From ce05175372a9ddca1a225db0765ace1127a39293 Mon Sep 17 00:00:00 2001 From: Nicholas Date: Fri, 12 Nov 2021 09:22:01 -0800 Subject: chore: simplified organizational structure --- sys/cmd/rc/code.c | 277 ------- sys/cmd/rc/exec.c | 1267 ------------------------------- sys/cmd/rc/exec.h | 47 -- sys/cmd/rc/input.c | 1679 ----------------------------------------- sys/cmd/rc/io.c | 437 ----------- sys/cmd/rc/job.c | 91 --- sys/cmd/rc/lex.c | 394 ---------- sys/cmd/rc/main.c | 66 -- sys/cmd/rc/parse.c | 2059 --------------------------------------------------- sys/cmd/rc/parse.h | 141 ---- sys/cmd/rc/prompt.c | 36 - sys/cmd/rc/rc.h | 263 ------- sys/cmd/rc/rules.mk | 31 - sys/cmd/rc/syntax.y | 147 ---- sys/cmd/rc/sys.c | 137 ---- sys/cmd/rc/tree.c | 111 --- sys/cmd/rc/util.c | 65 -- sys/cmd/rc/var.c | 336 --------- sys/cmd/rc/wait.c | 247 ------ 19 files changed, 7831 deletions(-) delete mode 100644 sys/cmd/rc/code.c delete mode 100644 sys/cmd/rc/exec.c delete mode 100644 sys/cmd/rc/exec.h delete mode 100644 sys/cmd/rc/input.c delete mode 100644 sys/cmd/rc/io.c delete mode 100644 sys/cmd/rc/job.c delete mode 100644 sys/cmd/rc/lex.c delete mode 100644 sys/cmd/rc/main.c delete mode 100644 sys/cmd/rc/parse.c delete mode 100644 sys/cmd/rc/parse.h delete mode 100644 sys/cmd/rc/prompt.c delete mode 100644 sys/cmd/rc/rc.h delete mode 100644 sys/cmd/rc/rules.mk delete mode 100644 sys/cmd/rc/syntax.y delete mode 100644 sys/cmd/rc/sys.c delete mode 100644 sys/cmd/rc/tree.c delete mode 100644 sys/cmd/rc/util.c delete mode 100644 sys/cmd/rc/var.c delete mode 100644 sys/cmd/rc/wait.c (limited to 'sys/cmd/rc') diff --git a/sys/cmd/rc/code.c b/sys/cmd/rc/code.c deleted file mode 100644 index 786f284..0000000 --- a/sys/cmd/rc/code.c +++ /dev/null @@ -1,277 +0,0 @@ -#include "rc.h" -#include "parse.h" -#include "exec.h" - -// ----------------------------------------------------------------------- -// types - -struct Interpreter -{ - int i, cap; - Code *code; -}; - -Code *compiled = nil; -static struct Interpreter interpreter; -#define emiti(x) ((void)(interpreter.i != interpreter.cap || grow()), interpreter.code[interpreter.i].i = (x), interpreter.i++) -#define emitf(x) ((void)(interpreter.i != interpreter.cap || grow()), interpreter.code[interpreter.i].f = (x), interpreter.i++) -#define emits(x) ((void)(interpreter.i != interpreter.cap || grow()), interpreter.code[interpreter.i].s = (x), interpreter.i++) - -static -int -grow(void) -{ - interpreter.cap += 100; - interpreter.code = erealloc(interpreter.code, sizeof(*interpreter.code)*interpreter.cap); - memset(interpreter.code+interpreter.cap-100, 0, 100*sizeof(*interpreter.code)); - - return 0; -} - -static -void -storepc(int a) -{ - if(interpreter.i <= a || a < 0) - fatal("bad address %d in interpreter", a); - - interpreter.code[a].i = interpreter.i; -} - -static -void -walk(Tree *node) -{ - Tree *n; - int addr1, addr2; - - if(!node) - return; - - switch(node->type){ - default: - print(shell.err, "bad type %d in interpreter walk\n", node->type); - fatal("crashing\n"); - break; - - case '$': - emitf(Xmark); - walk(node->child[0]); - emitf(Xdollar); - break; - - case Tcount: - emitf(Xmark); - walk(node->child[0]); - emitf(Xcount); - break; - - case Tjoin: - emitf(Xmark); - walk(node->child[0]); - emitf(Xjoin); - break; - - case Tindex: - emitf(Xmark); - walk(node->child[1]); - emitf(Xmark); - walk(node->child[0]); - emitf(Xindex); - break; - - case ';': - walk(node->child[0]); - walk(node->child[1]); - break; - - case '^': - emitf(Xmark); - walk(node->child[1]); - emitf(Xmark); - walk(node->child[0]); - emitf(Xconcatenate); - break; - - case Tandand: - walk(node->child[0]); - emitf(Xtrue); - addr1 = emiti(0); - walk(node->child[1]); - storepc(addr1); - break; - - case Toror: - walk(node->child[0]); - emitf(Xfalse); - addr1 = emiti(0); - walk(node->child[1]); - storepc(addr1); - break; - - case Targs: - walk(node->child[1]); - walk(node->child[0]); - break; - - case Tparen: case Tblock: - walk(node->child[0]); - break; - - case Tbasic: - emitf(Xmark); - walk(node->child[0]); - emitf(Xbasic); - break; - - case Tbang: - walk(node->child[0]); - emitf(Xbang); - - case Tword: - emitf(Xword); - emits(strdup(node->str)); - break; - - case Twords: - walk(node->child[1]); - walk(node->child[0]); - break; - - case '=': - for(n=node; node && node->type == '='; node = node->child[2]) - ; - if(node){ - for(node=n; node->type=='='; node = node->child[2]){ - emitf(Xmark); - walk(node->child[1]); - emitf(Xmark); - walk(node->child[0]); - emitf(Xlocal); - } - walk(node); - for(node=n; node->type=='='; node = node->child[2]) - emitf(Xunlocal); - }else{ - for(node=n; node; node=node->child[2]){ - emitf(Xmark); - walk(node->child[1]); - emitf(Xmark); - walk(node->child[0]); - emitf(Xassign); - } - } - node = n; - break; - /* control structures */ - case Twhile: - addr1 = interpreter.i; // head of loop - walk(node->child[0]); - if(addr1 == interpreter.i) - fatal("TODO"); - emitf(Xtrue); - addr2 = emiti(0); // goto end of loop - - walk(node->child[1]); - emitf(Xgoto); - emiti(addr1); // goto top of loop - storepc(addr2); - break; - - case Tfor: - emitf(Xmark); - if(node->child[1]){ // for( x in X ) - walk(node->child[1]); - // emitf(Xglob) - }else{ // for(X) - fatal("TODO"); - } - emitf(Xmark); // null initial value for Xlocal - emitf(Xmark); - walk(node->child[0]); - emitf(Xlocal); - - addr1 = emitf(Xfor); - addr2 = emiti(0); - - walk(node->child[2]); - emitf(Xgoto); - emiti(addr1); - storepc(addr2); - emitf(Xunlocal); - break; - - /* forks */ - case '&': - emitf(Xasync); - addr1 = emiti(0); - walk(node->child[0]); - emitf(Xexit); - storepc(addr1); - break; - - case Tsubshell: - emitf(Xsubshell); - addr1 = emiti(0); - walk(node->child[0]); - emitf(Xexit); - storepc(addr1); - break; - - case Tpipe: - emitf(Xpipe); - - emiti(node->redir.fd[0]); - emiti(node->redir.fd[1]); - addr1 = emiti(0); - addr2 = emiti(0); - - walk(node->child[0]); - emitf(Xexit); - storepc(addr1); - - walk(node->child[1]); - emitf(Xreturn); - storepc(addr2); - - emitf(Xpipewait); - - break; - } -} - -// ----------------------------------------------------------------------- -// main exports - -void -freecode(Code *c) -{ - if(--c[0].i!=0) - return; - efree(c); -} - -Code * -copycode(Code *c) -{ - c[0].i++; - return c; -} - -int -compile(Tree *node) -{ - flush(shell.err); - - interpreter.i = 0; - interpreter.code = emalloc(100*sizeof(*interpreter.code)); - emiti(0); // reference count: no thread owns code yet - - walk(node); - - emitf(Xreturn); - emitf(nil); - - compiled = interpreter.code; - return 0; -} diff --git a/sys/cmd/rc/exec.c b/sys/cmd/rc/exec.c deleted file mode 100644 index 5baaf1a..0000000 --- a/sys/cmd/rc/exec.c +++ /dev/null @@ -1,1267 +0,0 @@ -#include "rc.h" -#include "exec.h" - -#include - -int yyparse(void); - -struct Builtin{ - char *name; - void (*func)(void); -}; - -struct State { - int async; -}; - -static struct State state; - -// ----------------------------------------------------------------------- -// globals - -static Word nullpath = { .str="", .link=nil }; - -struct Builtin builtin[]={ - {"cd", xcd}, - {".", xdot}, - {"echo", xecho}, - {"exit", xexit}, - {"fg", xfg}, - {"jobs", xjob}, - 0, -}; - -// ----------------------------------------------------------------------- -// internal - -/* words and lists */ - -static -void -pushword(char *str) -{ - if(!runner->args) - fatal("attempt to push on empty argument stack\n"); - - runner->args->word = makeword(str, runner->args->word); -} - -static -void -popword(void) -{ - Word *w; - if(!runner->args) - fatal("tried to pop word on empty argument stack\n"); - - w = runner->args->word; - if(!w) - fatal("tried to pop word but nothing there\n"); - - runner->args->word = w->link; - efree(w->str); - efree(w); -} - -static -Word* -copywords(Word *a, Word *tail) -{ - Word *v = nil, **end; - - for(end=&v; a; a = a->link,end=&(*end)->link) - *end = makeword(a->str, nil); - *end = tail; - - return v; -} - -static -void -freewords(Word *w) -{ - Word *n; - while(w){ - efree(w->str); - n = w->link; - efree(w); - w = n; - } -} - -static -void -freelist(Word *w) -{ - Word *n; - while(w){ - n = w->link; - efree(w->str); - efree(w); - w = n; - } - -} - -static -void -pushlist(void) -{ - List *stack = emalloc(sizeof(*stack)); - - stack->word = nil; - stack->link = runner->args; - - runner->args = stack; -} - -static -void -poplist(void) -{ - List *stack = runner->args; - if(!stack) - fatal("attempted to pop an empty argument stack\n"); - - freelist(stack->word); - runner->args = stack->link; - efree(stack); -} - -/* system interop */ -static -Word* -path(char *w) -{ - Word *path; - - if(strncmp(w, "/", 1)==0 - || strncmp(w, "./", 2)==0 - || strncmp(w, "../", 3)==0 - || (path = var("path")->val)==0) - path=&nullpath; - - return path; -} - -static inline -void -undoredirs(void) -{ - while(runner->redir.end != runner->redir.start) - Xpopredir(); -} - -static inline -int -exitsnext(void) -{ - Code *c = &runner->code.exe[runner->code.i]; - while(c->f == Xpopredir) - c++; - - return c->f == Xexit; -} - -static inline -void -defaultsignal(void) -{ - signal(SIGINT, SIG_DFL); - signal(SIGQUIT, SIG_DFL); - signal(SIGTSTP, SIG_DFL); - signal(SIGTTIN, SIG_DFL); - signal(SIGTTOU, SIG_DFL); - signal(SIGCHLD, SIG_DFL); -} - -static inline -void -setpid(Thread *job, int pid) -{ - job->pid = pid; - if(job->pgid <= 0){ - job->pgid = pid; - addjob(job); - } - - setpgid(pid, job->pgid); -} - -/* fork/execute helpers */ - -static inline -void -initchild(Thread *job, int fg) -{ - int pid = getpid(); - setpid(job, pid); - - if(job->flag.user){ - if(fg) - tcsetpgrp(0, job->pgid); - else - job->flag.user = 0; - defaultsignal(); - } - - clearwait(job); -} - -static inline -void -initparent(Thread *job, int pid, int fg) -{ - setpid(job, pid); - - if(job->flag.user){ - if(!fg){ - tcsetpgrp(0, job->pgid); - job->flag.user = 0; - } - } - addwait(job, pid); -} - -static -void -xx(void) -{ - popword(); // "exec" - if(!runner->args->word){ - Xerror("empty argument list"); - return; - } - - redirect(runner->redir.end); - execute(runner->args->word, path(runner->args->word->str)); - poplist(); -} - -static -int -xforkx(void) -{ - int n, pid; - - switch(pid=fork()){ - case -1: - Xerror("try again\n"); - return -1; - case 0: // child - initchild(runner, 1); - - pushword("exec"); - xx(); - - exit(2); // NOTE: unreachable: xx does not return - default: // parent - initparent(runner, pid, 0); - - return pid; - } -} - -/* redirections */ -void -pushredir(int type, int from, int to) -{ - Redir *r = emalloc(sizeof(*r)); - - r->type = type; - r->from = from; - r->to = to; - - r->link = runner->redir.end, runner->redir.end = r; -} - -/* byte code */ -static -void -run(Code *c, int pc, Var *local, int inherit) -{ - Thread *new = emalloc(sizeof(*new)); - - new->code.i = pc; - new->code.exe = copycode(c); - - new->cmd.path = nil; - new->cmd.io = nil; - - new->args = nil; - new->local = local; - - new->flag.eof = 0; - if(runner){ - new->pid = runner->pid; - new->flag.user = runner->flag.user; - new->redir.end = new->redir.start = runner->redir.end; - }else{ - new->pid = shell.pid; - new->flag.user = shell.interactive; - new->redir.end = new->redir.start = nil; - } - - new->wait.status = 0; - new->wait.len = 0; - new->wait.cap = 0; - new->wait.on = nil; - - new->status = 0; - if(inherit) - new->pgid = runner->pgid; - else - new->pgid = -1; - - new->line = 0; - new->caller = runner; - new->link = nil; - - runner = new; -} - -// ----------------------------------------------------------------------- -// exported builtins - -// XXX: find a better place for these -Word* -makeword(char *str, Word *link) -{ - Word *w = emalloc(sizeof(*w)); - - w->str = strdup(str); - w->link = link; - - return w; -} - -void -freeword(Word *word) -{ - Word *n; - - while(word){ - efree(word->str); - n = word->link; - efree(word); - word = n; - } -} - -int -count(Word *w) -{ - int n; - for(n = 0; w; n++) - w = w->link; - return n; -} - -// ----------------------------------------------------------------------- -// builtins - -void -xecho(void) -{ - int fd; - Word *arg; - char *b, *s, buf[128]; - - fd = mapfd(1); - b = buf; - - popword(); // echo - - // TODO: controllable flags here - arg = runner->args->word; -printword: - s = arg->str; - while(*s){ - *b++ = *s++; - if(b == arrend(buf)-2) // always have 2 bytes available - write(fd, buf, arrlen(buf)-2), b = buf; - } - - arg = arg->link; - if(arg){ - *b++ = ' '; - goto printword; - }else{ - *b++ = '\n'; - *b++ = 0; - /* fallthrough */ - } - write(fd, buf, b-buf); - - poplist(); -} - -void -xexit(void) -{ - Word *arg; - - popword(); // exit - arg = runner->args->word; - switch(count(arg)){ - default: - print(shell.err, "invalid number of arguments to exit, exiting anyways\n"); - case 0: - Xexit(); - } - /* unreachable */ -} - -void -xcd(void) -{ - Word *arg; - Word *cdpath; - char dir[512]; - - popword(); // cd - - arg = runner->args->word; - switch(count(arg)){ - default: - print(shell.err, "usage: cd [directory]\n"); - break; - case 0: - arg = var("home")->val; - if(count(arg) >= 1){ - if(chdir(arg->str) < 0) - print(shell.err, "failed cd: %s\n", strerror(errno)); - }else{ - print(shell.err, "ambiguous cd: $home empty\n"); - } - break; - - case 1: - // TODO: add cdpath - cdpath = &nullpath; - for(; cdpath; cdpath = cdpath->link){ - strcpy(dir, cdpath->str); - if(dir[0]) - strcat(dir,"/"); - strcat(dir, arg->str); - if(chdir(dir) < 0){ - print(shell.err, "failed cd %s: %s\n", dir, strerror(errno)); - } - break; - } - break; - } - - poplist(); -} - -static Code dotcmd[14] = -{ - [0] = {.i = 0}, - [1] = {.f = Xmark}, - [2] = {.f = Xword}, - [3] = {.s = "0"}, - [4] = {.f = Xlocal}, - [5] = {.f = Xmark}, - [6] = {.f = Xword}, - [7] = {.s = "*"}, - [8] = {.f = Xlocal}, - [9] = {.f = Xreadcmd}, - [10] = {.f = Xunlocal}, - [11] = {.f = Xunlocal}, - [12] = {.f = Xreturn}, -}; - -void -xdot(void) -{ - Word *p; - List *argv; - char *base; - int fd, iflag = 0; - Thread *old; - char file[512]; - - popword(); // "." -#if 0 - if(proc->args->word && strcmp(proc->args->word->str, "-i")==0){ - iflag = 1; - popword(); - } -#endif - /* get input file */ - if(!runner->args->word){ - Xerror("usage: . [-i] file [arg ...]\n"); - return; - } - - base = strdup(runner->args->word->str); - popword(); - for(fd=-1, p=path(base); p; p = p->link){ - strcpy(file, p->str); - - if(file[0]) - strcat(file, "/"); - strcat(file, base); - - if((fd = open(file, 0))>=0) - break; - } - - if(fd<0){ - print(shell.err, "failed open: %s: ", base); - return; - } - /* set up for a new command loop */ - old = runner; // store pointer to old code - run(dotcmd, 1, nil, 0); - - /* operations on new command stack */ - pushredir(Rclose, fd, 0); - runner->cmd.path = base; - runner->cmd.io = openfd(fd); - - /* push $* value */ - pushlist(); - runner->args->word = old->args->word; - - /* free caller's copy of $* */ - argv = old->args; - old->args = argv->link; - efree(argv); - - /* push $0 value */ - pushlist(); - pushword(base); - //ndot++; -} - -void -xjob(void) -{ - int i; - Thread *job; - - for(i=0, job = shell.jobs; job; job = job->link, i++) - report(job,i); - - poplist(); -} - -void -xfg(void) -{ - int i; - Thread *job, *old; - - popword(); // fg - - /* get input job id */ - if(!runner->args->word){ - print(shell.err, "usage: fg [pid|\%num]\n"); - poplist(); - return; - } - - i = atoi(runner->args->word->str); - popword(); // [pid|num] - - for(job=shell.jobs; i > 0; job=job->link, --i) - ; - - poplist(); // this goes here? - - wakeup(job); - job->caller = runner, runner = job; // XXX: can this leave zombies? - foreground(job, 1); -} - -void -xboot(int argc, char *argv[]) -{ - int i; - Code bootstrap[32]; - char num[12]; - - i = 0; - bootstrap[i++].i = 1; - bootstrap[i++].f = Xmark; - bootstrap[i++].f = Xword; - bootstrap[i++].s="*"; - bootstrap[i++].f = Xassign; - bootstrap[i++].f = Xmark; - bootstrap[i++].f = Xmark; - bootstrap[i++].f = Xword; - bootstrap[i++].s="*"; - bootstrap[i++].f = Xdollar; - bootstrap[i++].f = Xword; - bootstrap[i++].s = "/dev/stdin"; - bootstrap[i++].f = Xword; - bootstrap[i++].s="."; - bootstrap[i++].f = Xbasic; - bootstrap[i++].f = Xexit; - bootstrap[i].i = 0; - - run(bootstrap, 1, nil, 0); - runner->pid = runner->pgid = shell.pid; - pushlist(); // prime bootstrap argv - - argv0 = strdup(argv[0]); - for(i = argc-1; i > 0; --i) - pushword(argv[i]); - - /* main interpreter loop */ - for(;;){ - runner->code.i++; - (*runner->code.exe[runner->code.i-1].f)(); - } -} - -// ----------------------------------------------------------------------- -// exported interpreter bytecode - -void -Xmark(void) -{ - pushlist(); -} - -void -Xword(void) -{ - pushword(runner->code.exe[runner->code.i++].s); -} - -void -Xtrue(void) -{ - if(!runner->status){ - assert(runner->wait.status == Pdone); - runner->code.i++; - deljob(runner); - runner->pgid = -1; - }else - runner->code.i = runner->code.exe[runner->code.i].i; -} - -void -Xfalse(void) -{ - if(runner->status){ - assert(runner->wait.status == Pdone); - runner->code.i++; - deljob(runner); - runner->pgid = -1; - } else - runner->code.i = runner->code.exe[runner->code.i].i; -} - -void -Xgoto(void) -{ - runner->code.i = runner->code.exe[runner->code.i].i; -} - -void -Xfor(void) -{ - if(!runner->args->word){ - poplist(); - runner->code.i = runner->code.exe[runner->code.i].i; - }else{ - freelist(runner->local->val); - - runner->local->val = runner->args->word; - runner->local->new = 1; - runner->args->word = runner->args->word->link; - - runner->local->val->link = nil; - runner->code.i++; - } - -} - -static -Word* -catlist(Word *l, Word *r, Word *tail) -{ - Word *w; - char *buf; - - if(l->link || r->link) - tail = catlist( (!l->link)?l:l->link, (!r->link)?r:r->link, tail); - - buf = emalloc(strlen(l->str)+strlen(r->str)+1); - strcpy(buf, l->str); - strcat(buf, r->str); - - w = makeword(buf, tail); - efree(buf); - - return w; -} - -void -Xconcatenate(void) -{ - int rn, ln; - Word *l = runner->args->word; - Word *r = runner->args->link->word; - Word *w = runner->args->link->link->word; - - ln = count(l), rn = count(r); - if(ln != 0 || rn != 0) { - if(ln == 0 || rn == 0){ - Xerror("null list in concatenation\n"); - return; - } - if(ln != 1 && rn != 1 && ln != rn) { - Xerror("mismatched list lengths in concatenation\n"); - return; - } - w = catlist(l, r, w); - } - - poplist(); - poplist(); - runner->args->word = w; -} - -void -Xdollar(void) -{ - int n; - char *s, *t; - Word *a, *star; - - if(count(runner->args->word)!=1){ - Xerror("variable name not singleton!\n"); - return; - } - s = runner->args->word->str; - // deglob(s); - n = 0; - - for(t = s;'0'<=*t && *t<='9';t++) - n = n*10+*t-'0'; - - a = runner->args->link->word; - - if(n==0 || *t) - a = copywords(var(s)->val, a); - else{ - star = var("*")->val; - if(star && 1<=n && n<=count(star)){ - while(--n) - star = star->link; - - a = makeword(star->str, a); - } - } - - poplist(); - runner->args->word = a; -} - -static -Word* -cpwords(Word *array, Word *tail, int n) -{ - Word *cp, **end; - - cp = nil, end = &cp; - while(n-- > 0){ - *end = makeword(array->str, nil); - end = &(*end)->link; - array = array->link; - } - *end = tail; - - return cp; -} - - -static -Word* -getindex(Word *array, int len, Word *index, Word *tail) -{ - char *s; - int n, m; - if(!index) - return tail; - - tail = getindex(array, len, index->link, tail); - - s = index->str; - //deglob(s) - - m = 0, n = 0; - while('0' <= *s && *s <= '9') - n = 10*n + (*s++ - '0'); - if(*s == '-'){ - if(*++s == 0) - m = len - n; - else{ - while('0' <= *s && *s <= '9') - m = 10*m + (*s++ - '0'); - m -= n; - } - } - - if(n<1 || n > len || m < 0) - return tail; - if(n+m > len) - m = len-n; - while(--n > 0) - array = array->link; - return cpwords(array, tail, m+1); -} - -void -Xindex(void) -{ - char *s; - Word *val, *ret; - - if(count(runner->args->word) != 1){ - Xerror("variable name not a singleton"); - return; - } - s = runner->args->word->str; - //deglob(s) - val = var(s)->val; - poplist(); - - ret = runner->args->link->word; // pointer to next stack frame - ret = getindex(val, count(val), runner->args->word, ret); - poplist(); - - // push result back on stack - runner->args->word = ret; -} - -void -Xjoin(void) -{ - int n; - char *s; - Word *arg, *elt; - - if(count(runner->args->word) != 1){ - Xerror("variable name is not singleton\n"); - return; - } - - s = runner->args->word->str; - // deglob(s) - - arg = var(s)->val; - poplist(); - - n = count(arg); - if(n==0){ - pushword(""); - return; - } - - for(elt = arg; elt; elt=elt->link) - n += strlen(elt->str); - - s = emalloc(n); - if(arg){ - strcpy(s, arg->str); - for(elt = arg->link; elt; elt = elt->link){ - strcat(s, " "); - strcat(s, elt->str); - } - }else - s[0] = 0; - - pushword(s); - efree(s); -} - -void -Xassign(void) -{ - Var *v; - - if(count(runner->args->word)!=1){ - Xerror("variable name not singleton!\n"); - return; - } - //deglob(runq->argv->words->word); - v = var(runner->args->word->str); - poplist(); - - //globlist(); - freewords(v->val); - v->val = runner->args->word; - v->new = 1; - if(v->update) - v->update(v); - - runner->args->word = nil; - poplist(); -} - -void -Xreadcmd(void) -{ - Thread *root; - Word *prompt; - - flush(shell.err); - root = runner; - - resetprompt(); - - if(yyparse()){ - // resource cleanup? - if(runner->flag.eof) - Xreturn(); - else - --root->code.i; - }else{ - --root->code.i; /* re-execute Xreadcmd after codebuf runs */ - run(compiled, 1, root->local, 0); - } - - killzombies(); - freeparsetree(); -} - -void -Xlocal(void) -{ - if(count(runner->args->word)!=1){ - Xerror("variable name must be singleton\n"); - return; - } - //deglob(shell->args->word->str); - - runner->local = makevar(strdup(runner->args->word->str), runner->local); - runner->local->val = copywords(runner->args->link->word, nil); - runner->local->new = 1; - - poplist(); - poplist(); -} - -void -Xunlocal(void) -{ - Var *v = runner->local, *hide; - if(!v) - fatal("Xunlocal: no locals!\n", 0); - - runner->local = v->link; - hide = var(v->name); - hide->new = 1; - - efree(v->name); - freewords(v->val); - efree(v); -} - -void -Xasync(void) -{ - int pid; - /* - int null = open("/dev/null", 0); - if(!null){ - Xerror("can not open /dev/null\n"); - return; - } - */ - - switch(pid=fork()){ - case -1: - // close(null); - Xerror("fork failed: try again"); - break; - - case 0: // child in background - initchild(runner,0); - /* pushredir(Ropen, null, 0); */ - - run(runner->code.exe, runner->code.i+1, runner->local, 0); - runner->caller = nil; - runner->flag.user = 0; - break; - - default: // parent in foreground - initparent(runner,pid,1); - // close(null); - - runner->code.i = runner->code.exe[runner->code.i].i; /* jump to end of async command */ - /* don't wait: continue running */ - } -} - -void -Xsubshell(void) -{ - int pid, user; - - user = runner->flag.user; - switch(pid=fork()){ - case -1: - Xerror("fork failed: try again"); - break; - - case 0: // child - initchild(runner, 1); - run(runner->code.exe, runner->code.i+1, runner->local, 1); - runner->caller = nil; - break; - - default: // parent - initparent(runner, pid, 0); // relinquish control - waitfor(runner, pid); // wait until child finishes - if(user){ - tcsetpgrp(0, shell.pid); - runner->flag.user = 1; // take control - } - - runner->code.i = runner->code.exe[runner->code.i].i; // jump to end of subshell command and continue execution - } -} - -void -Xpipewait(void) -{ - foreground(runner, 0); -} - -void -Xpipe(void) -{ - Thread *orig; - int pc, pid, lfd, rfd, pfd[2]; - - orig = runner; - pc = orig->code.i; - lfd = orig->code.exe[pc++].i; - rfd = orig->code.exe[pc++].i; - - if(pipe(pfd)<0){ - Xerror("can't get pipe\n"); - return; - } - - switch(pid=fork()){ - case -1: - Xerror("try again"); - break; - case 0: // child - initchild(runner,1); - - /* child 0 (writer) forked process */ - run(runner->code.exe, pc+2, runner->local, 1); - runner->caller = nil; - - close(pfd[0]); - pushredir(Ropen, pfd[1], lfd); - break; - - default: // parent - initparent(runner,pid,0); - - /* child 1 (reader) subprocess*/ - run(runner->code.exe, runner->code.exe[pc].i, runner->local, 1); - - close(pfd[1]); - pushredir(Ropen, pfd[0], rfd); - - orig->code.i = orig->code.exe[pc+1].i; - break; - } -} - -void -Xbasic(void) -{ - Var *v; - Word *arg; - int pid, status; - struct Builtin *b; - - arg = runner->args->word; - if(!arg){ - Xerror("empty argument list\n"); - return; - } - - v = var(arg->str); - if(v->func){ - return; - } - - // see if it matches a builtin - for(b = builtin; b->name; b++){ - if(strcmp(b->name, arg->str)==0){ - b->func(); - return; - } - } - - /* if we are here then it's an external command */ - if(exitsnext()){ // if we exit immediately, no need to fork - pushword("exec"); - xx(); - Xexit(); - } - - // run the external command - if((pid = xforkx()) < 0) { - Xerror("try again"); - return; - } - - poplist(); - foreground(runner, 0); // waits for child -} - -void -Xcount(void) -{ - Word *arg; - char *str, num[12]; - - if(count(runner->args->word) != 1){ - Xerror("variable name not a singleton\n"); - return; - } - - str = runner->args->word->str; - arg = var(str)->val; - poplist(); - - itoa(num, count(arg)); - pushword(num); -} - -void -Xflat(void) -{ - int len; - char *str; - Word *arg, *a; - - if(count(runner->args->word)!=1){ - Xerror("variable name is not a singleton\n"); - return; - } - - str = runner->args->word->str; - arg = var(str)->val; - poplist(); - - len = count(arg); - if(!len){ - pushword(""); - return; - } - - for(a=arg; a; a=a->link) - len += strlen(a->str); - - str = emalloc(len); - if(arg){ - strcpy(str, arg->str); - for(a = arg->link; a; a = a->link){ - strcat(str," "); - strcat(str,a->str); - } - }else - str[0] = 0; - - pushword(str); - efree(str); -} - -void -Xbang(void) -{ - if(runner->status) - runner->status = 0; - else - runner->status = 1; -} - -void -Xpopredir(void) -{ - Redir *r = runner->redir.end; - if(!r) - fatal("attempted to pop a nil redir\n"); - - runner->redir.end = runner->redir.end->link; - if(r->type==Ropen) - close(r->from); - - efree(r); -} - -void -Xreturn(void) -{ - Thread *curr = runner; - - switch(curr->wait.status){ - /* - * If our job is still running or suspended we must: - * 1. move program one step back to rerun Xreturn upon recall - * 2. return to our calling thread - * 3. don't free! - */ - case Prun: - report(curr, 0); - curr->flag.user = 0; - case Pstop: - curr->code.i--; - runner = curr->caller; - curr->caller = nil; // detach job - return; - /* - * If our job has finished: - * 1. remove from our list - * 2. continue to clean up its memory - */ - case Pdone: - deljob(curr); - /* fallthrough */ - default: - ; - } - - undoredirs(); - - while(curr->args) - poplist(); - freecode(curr->code.exe); - efree(curr->wait.on); - - runner = curr->caller; - efree(curr); - if(!runner) - exit(0); -} - -void -Xexit(void) -{ - exit(runner->status); -} - -void -Xerror(char *msg) -{ - print(shell.err, "rc: %s", msg); - flush(shell.err); - while(!runner->flag.user) - Xreturn(); -} - diff --git a/sys/cmd/rc/exec.h b/sys/cmd/rc/exec.h deleted file mode 100644 index a3a6ae9..0000000 --- a/sys/cmd/rc/exec.h +++ /dev/null @@ -1,47 +0,0 @@ -#pragma once - -/* - * opcode routines - * arguments on stack (...) - * arguments in line [...] - * code in line with jump around {...} - */ - -void Xmark(void); // Xmark marks stack location for word -void Xindex(void); // Xindex -void Xlocal(void); // Xlocal(name,val) create local variable, assign value -void Xunlocal(void); // Xunlocal delete local variable -void Xdollar(void); // Xdollar(name) get value of name -void Xtrue(void); // Xtrue{...} execute {} if true -void Xfalse(void); // Xfalse{...} execute {} if false -void Xgoto(void); // Xgoto[addr] goto address -void Xfor(void); // Xfor(var, list){... Xreturn} -void Xreadcmd(void); // -void Xassign(void); -void Xbang(void); -void Xasync(void); -void Xbasic(void); // Xbasic(args) run command and wait for result -void Xsubshell(void); -void Xword(void); -void Xjoin(void); -void Xconcatenate(void); -void Xcount(void); -void Xflat(void); -void Xpipe(void); -void Xpipewait(void); -void Xpopredir(void); - -void Xreturn(void); -void Xexit(void); - -void Xerror(char*); - -/* builtin commands */ -void xcd(void); -void xdot(void); -void xecho(void); -void xexit(void); -void xfg(void); -void xjob(void); - -void xboot(int argc, char *argv[]); diff --git a/sys/cmd/rc/input.c b/sys/cmd/rc/input.c deleted file mode 100644 index cc2383d..0000000 --- a/sys/cmd/rc/input.c +++ /dev/null @@ -1,1679 +0,0 @@ -#include "rc.h" - -#include -#include - -/* don't change order of these without modifying matrix */ -enum -{ - NonPrintable, - Alnum, - Punctuation, - Space -}; - -static int ascii[256] = -{ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 3, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, - 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, - 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -}; - -struct Mode -{ - ushort raw : 1; - ushort multiline : 1; - ushort mask : 1; - ushort defer : 1; - struct { - ushort on : 1; - ushort insert : 1; - } vi ; -}; - -/* - * the structure represents the state during line editing. - * we pass this state to functions implementing specific editing functionalities - */ -struct TerminalState -{ - int ifd; /* terminal stdin file descriptor. */ - int ofd; /* terminal stdout file descriptor. */ - - struct{ - char *s; /* raw UTF-8 bytes */ - int len; /* number of bytes in prompt */ - int size; /* number of (printed) runes in prompt */ - } prompt; - - struct{ - intptr cap; /* capacity of edit buffer */ - intptr len; /* current number of bytes stored */ - intptr pos; /* position within edit buffer */ - char *buf; - } edit; /* edit buffer */ - - struct{ - intptr cap; /* number of columns in terminal */ - intptr len; /* current edited line length (in runes) */ - intptr pos; /* current cursor position (in runes) */ - intptr old; /* previous refresh cursor position (in runes) */ - } cursor; - - struct{ - intptr cap; - intptr len; - char *buf; - } yank; /* yank buffer */ - - intptr maxrows; /* maximum num of rows used so far (multiline mode) */ - intptr history; /* index of history we are currently editing */ -}; - -/* - * line history (circular buffer) - */ -struct History -{ - char **bot, **top, *entry[1024]; -}; - -/* globals */ -static struct Mode mode; -static struct History history; -static struct termios originalterm; - -enum -{ - KeyNil = 0, /* nil */ - KeyCtrlA = 1, /* Ctrl+a */ - KeyCtrlB = 2, /* Ctrl-b */ - KeyCtrlC = 3, /* Ctrl-c */ - KeyCtrlD = 4, /* Ctrl-d */ - KeyCtrlE = 5, /* Ctrl-e */ - KeyCtrlF = 6, /* Ctrl-f */ - KeyCtrlH = 8, /* Ctrl-h */ - KeyTab = 9, /* Tab */ - KeyCtrlK = 11, /* Ctrl+k */ - KeyCtrlL = 12, /* Ctrl+l */ - KeyEnter = 13, /* Enter */ - KeyCtrlN = 14, /* Ctrl-n */ - KeyCtrlP = 16, /* Ctrl-p */ - KeyCtrlT = 20, /* Ctrl-t */ - KeyCtrlU = 21, /* Ctrl+u */ - KeyCtrlW = 23, /* Ctrl+w */ - KeyEsc = 27, /* Escape */ - KeyBackspace = 127 /* Backspace */ -}; - -static void doatexit(void); - -/* vi operations */ -typedef struct -{ - intptr buffer; - intptr cursor; -} Position; - -typedef Position (*Noun)(struct TerminalState*, int); -typedef void (*Verb)(struct TerminalState*, Position); - -static -int -runetype(rune r) -{ - if(r<128) - return ascii[r]; - if(utf8·isspace(r)) - return Space; - if(utf8·isdigit(r) || utf8·isalpha(r)) - return Alnum; - if(utf8·ispunct(r)) - return Punctuation; - - return NonPrintable; -} - -static -void -normalcursor(int fd) -{ - write(fd,"\e[2 q",5); -} - -static -void -insertcursor(int fd) -{ - write(fd,"\e[6 q",5); -} - -/* raw mode: 1960 magic shit. */ -static -int -enterraw(int fd) -{ - struct termios raw; - - if(!shell.interactive) - goto fatal; - - if(!mode.defer){ - atexit(doatexit); - mode.defer = 1; - } - if(tcgetattr(fd,&originalterm) == -1) - goto fatal; - - raw = originalterm; /* modify the original mode */ - - /* input modes: no break, no CR to NL, no parity check, no strip char, - * no start/stop output control. */ - raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); - /* output modes - disable post processing */ - raw.c_oflag &= ~(OPOST); - /* control modes - set 8 bit chars */ - raw.c_cflag |= (CS8); - /* local modes - choing off, canonical off, no extended functions, - * no signal chars (^Z,^C) */ - raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG); - /* control chars - set return condition: min number of bytes and timer. - * We want read to return every single byte, without timeout. */ - raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */ - - /* put terminal in raw mode after flushing */ - if(tcsetattr(fd,TCSAFLUSH,&raw) < 0) - goto fatal; - - mode.raw = 1; - return 1; - -fatal: - errno = ENOTTY; - return 0; -} - -static -void -exitraw(int fd) -{ - /* don't even check the return value as it's too late. */ - if(mode.raw && tcsetattr(fd,TCSAFLUSH,&originalterm) != -1) - mode.raw = 0; -} - -/* use the esc [6n escape sequence to query the horizontal cursor position - * and return it. on error -1 is returned, on success the position of the - * cursor. */ -static -int -cursorposition(int ifd, int ofd) -{ - char buf[32]; - int cols, rows; - unsigned int i = 0; - - /* Report cursor location */ - if(write(ofd, "\x1b[6n", 4) != 4) - return -1; - - /* Read the response: ESC [ rows ; cols R */ - while(i < sizeof(buf)-1) { - if(read(ifd,buf+i,1) != 1) - break; - if(buf[i] == 'R') - break; - i++; - } - buf[i] = '\0'; - - /* Parse it. */ - if(buf[0] != KeyEsc || buf[1] != '[') - return -1; - if(sscanf(buf+2,"%d;%d",&rows,&cols) != 2) - return -1; - - return cols; -} - -/* try to get the number of columns in the current terminal, or assume 80 if it fails. */ -static -int -columns(int ifd, int ofd) -{ - struct winsize ws; - - if(ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0){ - /* ioctl() failed. Try to query the terminal itself. */ - int start, cols; - - /* Get the initial position so we can restore it later. */ - start = cursorposition(ifd,ofd); - if(start == -1) - goto failed; - - /* Go to right margin and get position. */ - if(write(ofd,"\x1b[999C",6) != 6) - goto failed; - cols = cursorposition(ifd,ofd); - if(cols == -1) - goto failed; - - /* Restore position. */ - if(cols > start){ - char esc[32]; - snprintf(esc,32,"\x1b[%dD",cols-start); - if(write(ofd,esc,strlen(esc)) == -1) - ; - } - return cols; - }else - return ws.ws_col; - -failed: - return 80; -} - -static -void -clear(void) -{ - if(write(1,"\x1b[H\x1b[2J",7) <= 0) - ; -} - -/* beep: used for completion when there is nothing to complete or when all - * the choices were already shown. */ -static -void -beep(void) -{ - fprintf(stderr, "\x7"); - fflush(stderr); -} - -// ----------------------------------------------------------------------- -// command history - -void -inithistory(void) -{ - history.bot = history.top = history.entry; -} - -int -addhistory(char *line) -{ - char *copy; - - copy = strdup(line); - if(!copy) - return 0; - - *history.top++ = copy; - if(history.top == arrend(history.entry)) - history.top = history.entry; - - if(history.top == history.bot){ - efree(history.bot); - history.bot++; - } - - return 1; -} - -static -void -pophistory(void) -{ - if(--history.top < history.entry) - history.top = arrend(history.entry)-1; - efree(*history.top); -} - -static void refreshline(struct TerminalState *); - -static -char ** -currenthistory(struct TerminalState *term, intptr *size) -{ - char **entry; - intptr len, head; - - if(history.top > history.bot){ - len = history.top - history.bot; - entry = history.top - term->history - 1; - }else if(history.top < history.bot){ - len = (arrend(history.entry) - history.bot) + (history.top - history.entry); - if((head=history.top - history.entry) < term->history) - entry = arrend(history.entry) - head; - else - entry = history.top - term->history - 1; - }else - return nil; - - *size = len; - return entry; -} - -static -void -usehistory(struct TerminalState *term, int d) -{ - rune r; - intptr w, len; - char *b, *e, **entry; - - if(!(entry = currenthistory(term, &len))) - return; - - efree(*entry); - *entry = strdup(term->edit.buf); - - term->history += d; - if(term->history < 0){ - term->history = 0; - return; - }else if(term->history >= len){ - term->history = len - 1; - return; - } - entry = currenthistory(term, &len); - - strncpy(term->edit.buf, *entry, term->edit.cap); - term->edit.buf[term->edit.cap-1] = 0; - - /* update cursor/buffer positions */ - term->edit.len = term->edit.pos = strlen(term->edit.buf); - for(w=0, b=term->edit.buf, e=term->edit.buf+term->edit.len; b < e; ){ - b += utf8·decode(b, &r); - w += utf8·runewidth(r); - } - term->cursor.len = term->cursor.pos = w; - - refreshline(term); -} - -// ----------------------------------------------------------------------- -// line editing - -/* - * we define a very simple "append buffer" structure, that is an heap - * allocated string where we can append to. this is useful in order to - * write all the escape sequences in a buffer and flush them to the standard - * output in a single call, to avoid flickering effects. - */ - -struct Buffer -{ - int len; - char *b; -}; - -static -void -initbuffer(struct Buffer *ab) -{ - ab->b = nil; - ab->len = 0; -} - -static -void -append(struct Buffer *ab, const char *s, int len) -{ - char *new = realloc(ab->b,ab->len+len); - - if (new == nil) return; - memcpy(new+ab->len,s,len); - ab->b = new; - ab->len += len; -} - -static -void -freebuffer(struct Buffer *ab) -{ - free(ab->b); -} - -/* single line low level line refresh. - * - * rewrite the currently edited line accordingly to the buffer content, - * cursor position, and number of columns of the terminal. */ -static -void -refreshsingleline(struct TerminalState *term) -{ - char esc[64]; - struct Buffer ab; - - int n, w; - rune r; - int fd = term->ofd; - intptr off = term->prompt.size; - char *buf = term->edit.buf; - intptr len = term->edit.len; - intptr pos = term->cursor.pos; - intptr col = term->cursor.len; - - while((off+pos) >= term->cursor.cap){ - n = utf8·decode(buf, &r); - w = utf8·runewidth(r); - - buf+=n, len-=n; - pos-=w, col-=w; - } - - assert(buf <= term->edit.buf + len); - - while(off+col > term->cursor.cap){ - n = utf8·decodeprev(buf+len-1, &r); - w = utf8·runewidth(r); - - len-=n, col-=w; - } - assert(len >= 0); - - initbuffer(&ab); // TODO: do we need so much malloc pressure? - - /* move cursor to left edge */ - snprintf(esc,64,"\r"); - append(&ab,"\r",1); - - /* write the prompt and the current buffer content */ - append(&ab, term->prompt.s, term->prompt.len); - - if(mode.mask == 1) - while(len--) - append(&ab,"*",1); - else - append(&ab,buf,len); - - snprintf(esc,64,"\x1b[0K"); // erase to right - append(&ab,esc,strlen(esc)); - - snprintf(esc,64,"\r\x1b[%dC", (int)(off+pos)); // move cursor to original position - append(&ab,esc,strlen(esc)); - - if(write(fd,ab.b,ab.len) == -1) /* can't recover from write error. */ - ; - - freebuffer(&ab); -} - -/* multi line low level line refresh. - * - * Rewrite the currently edited line accordingly to the buffer content, - * cursor position, and number of columns of the terminal. */ -static -void -refreshmultilines(struct TerminalState *term) -{ -#if 0 - char esc[64]; - int plen = term->plen; - int rows = (plen+term->len+term->cols-1)/term->cols; /* rows used by current buf. */ - int rpos = (plen+term->oldpos+term->cols)/term->cols; /* cursor relative row. */ - int rpos2; /* rpos after refresh. */ - int col; /* colum position, zero-based. */ - int i; - int old_rows = term->maxrows; - int fd = term->ofd, j; - struct Buffer ab; - - /* Update maxrows if needed. */ - if(rows > (int)term->maxrows) - term->maxrows = rows; - - /* First step: clear all the lines used before. To do so start by - * going to the last row. */ - initbuffer(&ab); - if(old_rows-rpos > 0){ - snprintf(esc,64,"\x1b[%dB", old_rows-rpos); - append(&ab,esc,strlen(esc)); - } - - /* Now for every row clear it, go up. */ - for(j = 0; j < old_rows-1; j++){ - snprintf(esc,64,"\r\x1b[0K\x1b[1A"); - append(&ab,esc,strlen(esc)); - } - - /* clean the top line. */ - snprintf(esc,64,"\r\x1b[0K"); - append(&ab,esc,strlen(esc)); - - /* Write the prompt and the current buffer content */ - append(&ab,term->prompt,strlen(term->prompt)); - if(mode.mask == 1){ - for(i = 0; i < term->len; i++) append(&ab,"*",1); - }else - append(&ab,term->buf,term->len); - - /* If we are at the very end of the screen with our prompt, we need to - * emit a newline and move the prompt to the first column. */ - if(term->pos && term->pos == term->len && (term->pos+plen) % term->cols == 0) { - append(&ab,"\n",1); - snprintf(esc,64,"\r"); - append(&ab,esc,strlen(esc)); - rows++; - if(rows > (int)term->maxrows) - term->maxrows = rows; - } - - /* Move cursor to right position. */ - rpos2 = (plen+term->pos+term->cols)/term->cols; /* current cursor relative row. */ - - /* Go up till we reach the expected positon. */ - if(rows-rpos2 > 0){ - snprintf(esc,64,"\x1b[%dA", rows-rpos2); - append(&ab,esc,strlen(esc)); - } - - /* Set column. */ - col = (plen+(int)term->pos) % (int)term->cols; - if(col) - snprintf(esc,64,"\r\x1b[%dC", col); - else - snprintf(esc,64,"\r"); - append(&ab,esc,strlen(esc)); - - term->oldpos = term->pos; - - if(write(fd,ab.b,ab.len) == -1) /* Can't recover from write error. */ - ; - - freebuffer(&ab); -#endif -} - -/* Calls the two low level functions refreshSingleLine() or - * refreshMultiLine() according to the selected mode. */ -static -void -refreshline(struct TerminalState *term) -{ - if(mode.multiline) - refreshmultilines(term); - else - refreshsingleline(term); -} - -/* insert the rune 'c' at cursor current position. - * on error writing to the terminal -1 is returned, otherwise 0. */ -int -insertrune(struct TerminalState *term, int n, char *c) -{ - int w; - rune r; - - utf8·decode(c, &r); - w = utf8·runewidth(r); - - if(term->edit.len + n <= term->edit.cap){ - if(term->edit.pos == term->edit.len){ - memcpy(term->edit.buf+term->edit.pos, c, n); - - term->edit.pos += n, term->edit.len += n; - term->cursor.pos += w, term->cursor.len += w; - - term->edit.buf[term->edit.len] = '\0'; - - if(!mode.multiline && ((term->prompt.size+term->cursor.pos+n) <= term->cursor.cap)){ - if(mode.mask){ - c = "*"; - n = 1; - } - if(write(term->ofd, c, n) == -1) - return 0; - } - refreshline(term); - }else{ - memmove(term->edit.buf+term->edit.pos+n, term->edit.buf+term->edit.pos, term->edit.len-term->edit.pos); - memcpy(term->edit.buf+term->edit.pos, c, n); - - term->edit.pos += n, term->edit.len += n; - term->cursor.pos += w, term->cursor.len += w; - - term->edit.buf[term->edit.len] = '\0'; - refreshline(term); - } - } - - return 1; -} - -int -insertbytes(struct TerminalState *term, int len, char *buf) -{ - int nr; - if(term->edit.len + len > term->edit.cap){ - len = term->edit.cap - term->edit.len; - buf[len] = 0; - } - nr = utf8·len(buf); - - if(term->edit.pos == term->cursor.len){ - memcpy(term->edit.buf+term->edit.len, buf, len); - - term->edit.pos += len, term->edit.len += len; - term->cursor.pos += nr, term->cursor.len += nr; - - // XXX: transfer the modeline here? - term->edit.buf[term->edit.len] = '\0'; - refreshline(term); - }else{ - memmove(term->edit.buf+term->edit.pos+len,term->edit.buf+term->edit.pos,term->edit.len-term->edit.pos); - memcpy(term->edit.buf+term->edit.pos, buf, len); - - term->edit.pos += len, term->edit.len += len; - term->cursor.pos += nr, term->cursor.len += nr; - - term->edit.buf[term->edit.len] = '\0'; - refreshline(term); - } - - return 1; -} - -// ----------------------------------------------------------------------- -// vi functionality - -/* modes */ - -static -void -normalmode(int fd) -{ - mode.vi.insert = 0; - normalcursor(fd); -} - -static -void -insertmode(int fd) -{ - mode.vi.insert = 1; - insertcursor(fd); -} - -/* actions */ - -static -void -move(struct TerminalState *term, Position to) -{ - if(to.buffer != term->edit.pos){ - term->edit.pos = to.buffer; - term->cursor.pos = to.cursor; - refreshline(term); - } -} - -static -void -yank(struct TerminalState *term, Position to) -{ - intptr len, off; - - if(to.buffer == term->edit.pos) - return; // noop - - if(to.buffer > term->edit.pos){ - len = to.buffer - term->edit.pos; - off = term->edit.pos; - }else{ - len = term->edit.pos - to.buffer; - off = to.buffer; - } - - if(term->yank.cap < len+1){ - efree(term->yank.buf); - term->yank.cap = len+1; - term->yank.buf = emalloc(len+1); - } - term->yank.len = len; - memcpy(term->yank.buf, term->edit.buf+off, len); - term->yank.buf[len] = 0; -} - -static -void -delete(struct TerminalState *term, Position to) -{ - intptr diff; - - // delete characters in front of us (exclusive) - if(to.buffer > term->edit.pos){ - diff = to.buffer - term->edit.pos; - memmove(term->edit.buf+term->edit.pos, term->edit.buf+to.buffer, term->edit.len-to.buffer+1); - term->edit.len -= diff; - - diff = to.cursor - term->cursor.pos; - goto refresh; - } - - // delete characters behind us - if(to.buffer < term->edit.pos){ - diff = term->edit.pos - to.buffer; - memmove(term->edit.buf+to.buffer, term->edit.buf+term->edit.pos, term->edit.len-term->edit.pos+1); - term->edit.pos = to.buffer; - term->edit.len -= diff; - - diff = term->cursor.pos - to.cursor; - term->cursor.pos = to.cursor; - goto refresh; - } - // do nothing - return; - -refresh: - term->cursor.len -= diff; - refreshline(term); -} -/* movements */ - -#define CURRENT(term) (Position){ .buffer=(term)->edit.pos, .cursor=(term)->cursor.pos }; - -// move cursor to the left n boxes -static -Position -left(struct TerminalState *term, int n) -{ - rune r; - int w, d; - Position pos = CURRENT(term); - char *buf = term->edit.buf + term->edit.pos; - - d = 0; - while(n > 0 && buf > term->edit.buf){ - buf -= utf8·decodeprev(buf-1, &r); - - w = utf8·runewidth(r); - n -= w; - d += w; - } - - pos.cursor = MAX(pos.cursor-d, 0); - pos.buffer = MAX(buf-term->edit.buf, 0); - return pos; -} - -// move cursor to the right n boxes -static -Position -right(struct TerminalState *term, int n) -{ - rune r; - int w, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - char *end = term->edit.buf + term->edit.len; - - d = 0; - while(n > 0 && buf < end){ - buf += utf8·decode(buf, &r); - - w = utf8·runewidth(r); - n -= w; - d += w; - } - - pos.cursor = MIN(pos.cursor+d, term->cursor.len); - pos.buffer = MIN(buf-term->edit.buf, term->edit.len); - return pos; -} - -static -Position -prevword(struct TerminalState *term, int n) -{ - rune r; - int c, w, b, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - - d = 0; - while(n-- > 0 && buf > term->edit.buf){ - eatspace: - b = utf8·decodeprev(buf-1, &r); - w = utf8·runewidth(r); - if((c=runetype(r)) == Space){ - buf -= b; - d += w; - - if(buf <= term->edit.buf) - break; - - goto eatspace; - } - - eatword: - if(runetype(r) == c){ - buf -= b; - d += w; - - if(buf <= term->edit.buf) - break; - - b = utf8·decodeprev(buf-1, &r); - w = utf8·runewidth(r); - - goto eatword; - } - } - - pos.cursor = MAX(pos.cursor-d, 0); - pos.buffer = MAX(buf-term->edit.buf, 0); - return pos; -} - -static -Position -nextword(struct TerminalState *term, int n) -{ - rune r; - int c, b, w, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - char *end = term->edit.buf + term->edit.len; - - d = 0; - while(n-- > 0 && buf < end){ - b = utf8·decode(buf, &r); - w = utf8·runewidth(r); - c = runetype(r); - eatword: - if(runetype(r) == c){ - buf += b; - d += w; - - if(buf >= end) - break; - - b = utf8·decode(buf, &r); - w = utf8·runewidth(r); - goto eatword; - } - eatspace: - while((c=runetype(r)) == Space){ - buf += b; - d += w; - - if(buf >= end) - break; - - b = utf8·decode(buf, &r); - w = utf8·runewidth(r); - goto eatspace; - } - } - - pos.cursor = MIN(pos.cursor+d, term->cursor.len); - pos.buffer = MIN(buf-term->edit.buf, term->edit.len); - return pos; -} - - -static -Position -prevWord(struct TerminalState *term, int n) -{ - rune r; - int c, w, b, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - - d = 0; - while(n-- > 0 && buf > term->edit.buf){ - eatspace: - b = utf8·decodeprev(buf-1, &r); - w = utf8·runewidth(r); - if((c=runetype(r)) == Space){ - buf -= b; - d += w; - - if(buf <= term->edit.buf) - break; - - goto eatspace; - } - - eatword: - if((c=runetype(r)) != Space){ - buf -= b; - d += w; - - if(buf <= term->edit.buf) - break; - - b = utf8·decodeprev(buf-1, &r); - w = utf8·runewidth(r); - - goto eatword; - } - } - - pos.cursor = MAX(pos.cursor-d, 0); - pos.buffer = MAX(buf-term->edit.buf, 0); - return pos; -} - -static -Position -nextWord(struct TerminalState *term, int n) -{ - rune r; - int b, w, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - char *end = term->edit.buf + term->edit.len; - - d = 0; - while(n-- > 0 && buf < end){ - eatword: - b = utf8·decode(buf, &r); - w = utf8·runewidth(r); - if(runetype(r) != Space){ - buf += b; - d += w; - - if(buf > end) - break; - - goto eatword; - } - - eatspace: - if(runetype(r) == Space){ - buf += b; - d += w; - - if(buf > end) - break; - - b = utf8·decode(buf, &r); - w = utf8·runewidth(r); - - goto eatspace; - } - } - - pos.cursor = MIN(pos.cursor+d, term->cursor.len); - pos.buffer = MIN(buf-term->edit.buf, term->edit.len); - return pos; -} - -static -Position -nextend(struct TerminalState *term, int n) -{ - rune r; - int c, b, w, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - char *end = term->edit.buf + term->edit.len; - - d = 0; - while(n-- > 0 && buf+1 < end){ - eatspace: - b = utf8·decode(buf+1, &r); - w = utf8·runewidth(r); - while((c=runetype(r)) == Space){ - buf += b; - d += w; - - if(buf+1 >= end) - break; - - goto eatspace; - } - eatword: - if(runetype(r) == c){ - buf += b; - d += w; - - if(buf+1 >= end) - break; - - b = utf8·decode(buf+1, &r); - w = utf8·runewidth(r); - goto eatword; - } - } - - pos.cursor = MIN(pos.cursor+d, term->cursor.len); - pos.buffer = MIN(buf-term->edit.buf, term->edit.len); - return pos; -} - -static -Position -nextEnd(struct TerminalState *term, int n) -{ - rune r; - int b, w, d; - Position pos = CURRENT(term); - - char *buf = term->edit.buf + term->edit.pos; - char *end = term->edit.buf + term->edit.len; - - d = 0; - while(n-- > 0 && buf+1 < end){ - eatspace: - b = utf8·decode(buf+1, &r); - w = utf8·runewidth(r); - if(runetype(r) == Space){ - buf += b; - d += w; - - if(buf+1 > end) - break; - - goto eatspace; - } - - eatword: - if(runetype(r) != Space){ - buf += b; - d += w; - - if(buf+1 > end) - break; - - b = utf8·decode(buf+1, &r); - w = utf8·runewidth(r); - - goto eatword; - } - } - - pos.cursor = MIN(pos.cursor+d, term->cursor.len); - pos.buffer = MIN(buf-term->edit.buf, term->edit.len); - return pos; -} - -#define HOME(term) (Position){0} -#define END(term) (Position){(term)->edit.len, (term)->cursor.len} - -static -int -vi(struct TerminalState *term, char c) -{ - int n = 1; - Verb verb = move; - -action: - switch(c){ - /* # of repeats */ - case '1': case '2': case '3': - case '4': case '5': case '6': - case '7': case '8': case '9': - n = 0; - while('0' <= c && c <= '9'){ - n = 10*n + (c-'0'); - if(read(term->ifd, &c, 1)<1) - return -1; - } - goto action; - - /* composable actions */ - case 'l': verb(term, right(term, n)); break; - case 'h': verb(term, left(term, n)); break; - case '0': verb(term, HOME(term)); break; - case '$': verb(term, END(term)); break; - case 'b': verb(term, prevword(term,n)); break; - case 'B': verb(term, prevWord(term,n)); break; - case 'w': verb(term, nextword(term,n)); break; - case 'W': verb(term, nextWord(term,n)); break; - case 'e': verb(term, nextend(term,n)); break; - case 'E': verb(term, nextEnd(term,n)); break; - - /* verb switches */ - case 'd': // delete - verb = delete; - if(read(term->ifd, &c, 1)<1) - return -1; - /* special cases */ - switch(c){ - case 'd': - move(term, HOME(term)); - delete(term, END(term)); - return 0; - default: - goto action; - } - case 'y': // yank - verb = yank; - if(read(term->ifd, &c, 1)<1) - return -1; - /* special cases */ - switch(c){ - case 'y': - if(term->yank.cap < term->edit.len+1){ - efree(term->yank.buf); - term->yank.len = term->edit.len; - term->yank.cap = term->edit.len+1; - term->yank.buf = emalloc(term->yank.cap); - } - memcpy(term->yank.buf, term->edit.buf, term->edit.len+1); - break; - default: - goto action; - } - break; - - case 'p': // put - insertbytes(term, term->yank.len, term->yank.buf); - refreshline(term); - return 0; - - /* special cases - * sadly I don't know a better way than to have these checks for move - * the vi language doesn't fully compose - */ - case 'i': insertmode: - if(verb != move) goto unrecognized; - insertmode(term->ofd); - break; - - case 'I': - if(verb != move) goto unrecognized; - move(term, HOME(term)); - goto insertmode; - - case 'a': - if(verb != move) goto unrecognized; - if(term->edit.pos < term->edit.len){ - term->edit.pos++; - refreshline(term); - } - goto insertmode; - - case 'A': - if(verb != move) goto unrecognized; - move(term, END(term)); - goto insertmode; - - case 'x': - if(verb != move) goto unrecognized; - delete(term, right(term, 1)); - break; - - case 'X': - if(verb != move) goto unrecognized; - delete(term, left(term, 1)); - break; - - case 'r': - if(verb != move) goto unrecognized; - if(read(term->ifd, &c, 1)<1) - return -1; - if(c < ' ') - break; - term->edit.buf[term->edit.pos] = c; - refreshline(term); - break; - - // TODO: replace mode? - - case 'c': - if(verb != move) goto unrecognized; - insertmode(term->ofd); - verb = delete; - if(read(term->ifd, &c, 1)<1) - return -1; - goto action; - - case 'C': - if(verb != move) goto unrecognized; - insertmode(term->ofd); - goto deleteln; - - case 'D': - if(verb != move) goto unrecognized; - deleteln: - term->edit.len = term->edit.pos; - term->edit.buf[term->edit.pos] = 0; - refreshline(term); - break; - - default: unrecognized: - beep(); - break; - } - - return 0; -} -#undef END - -#define END(term) (Position){(term).edit.len, (term).cursor.len} - -static -int -size(char *s) -{ - rune c; - int n, len = 0;; - while((c=*s)){ - if(c == '\033'){ - n = 1; - esccode: - c = s[n]; - if(!c) // we hit end of string in the middle of parsing an escape code! - return len; - if(c == 'm'){ - s += n + 1; - continue; // outer loop - } - n++; - goto esccode; - } - n = utf8·decode(s, &c); - s += n; - len += utf8·runewidth(c); - } - return len; -} - -/* this function is the core of the line editing capability of linenoise. - * it expects 'fd' to be already in "raw mode" so that every key pressed - * will be returned asap to read(). - * - * the resulting string is put into 'buf' when the user type enter, or - * when ctrl+d is typed. - * - * the function returns the length of the current buffer. */ -static -int -interact(int ifd, int ofd, char *buf, intptr len, char *prompt) -{ - int n, aux; - char esc[3]; - char c[UTFmax+1] = { 0 }; - rune r; - - struct TerminalState term; - /* - * populate the state that we pass to functions implementing - * specific editing functionalities - */ - term.ifd = ifd; - term.ofd = ofd; - - term.edit.buf = buf; - term.edit.cap = len; - term.edit.len = 0; - term.edit.pos = 0; - - term.prompt.s = prompt; - term.prompt.len = strlen(prompt); - term.prompt.size = size(prompt); - - term.cursor.pos = 0; - term.cursor.len = 0; - term.cursor.cap = columns(ifd, ofd); - - term.maxrows = 0; - term.history = 0; - - term.yank.buf = nil; - term.yank.cap = term.yank.len = 0; - - /* buffer starts empty. */ - term.edit.buf[0] = '\0'; - term.edit.cap--; /* make sure there is always space for the nulterm */ - - /* push current (empty) command onto history stack */ - addhistory(""); - - if(write(term.ofd,prompt,term.prompt.len) == -1) - return -1; - - for(;;){ - n = read(term.ifd,c,1); - if(n <= 0) - goto finish; - - /* partition input by rune */ - if(utf8·onebyte(c[0])){ - r = c[0]; - }else if(utf8·twobyte(c[0])){ - n = read(term.ifd,c+1,1); - if(n < 1 || (n=utf8·decode(c, &r)) != 2) - goto finish; - }else if(utf8·threebyte(c[0])){ - n = read(term.ifd,c+1,2); - if(n < 2 || (n=utf8·decode(c, &r)) != 3) - goto finish; - }else if(utf8·fourbyte(c[0])){ - n = read(term.ifd,c+1,3); - if(n < 3 || (n=utf8·decode(c, &r)) != 4) - goto finish; - }else - goto finish; - - switch(r){ - case KeyEnter: - pophistory(); - if(mode.multiline) - move(&term, END(term)); - goto finish; - - case KeyCtrlC: - errno = EAGAIN; - return -1; - - case KeyBackspace: - case KeyCtrlH: - delete(&term, left(&term, 1)); - break; - - case KeyCtrlD: - if(term.edit.len > 0) - delete(&term, right(&term, 1)); - break; - - case KeyCtrlT: - if(term.edit.pos > 0 && term.edit.pos < term.edit.len){ - aux = buf[term.edit.pos-1]; - - buf[term.edit.pos-1] = buf[term.edit.pos]; - buf[term.edit.pos] = aux; - - if(term.edit.pos != term.edit.len-1) - term.edit.pos++; - - refreshline(&term); - } - break; - - case KeyCtrlB: - move(&term, left(&term, 1)); - break; - - case KeyCtrlF: /* ctrl-f */ - move(&term, right(&term, 1)); - break; - - case KeyCtrlP: /* ctrl-p */ - usehistory(&term, +1); - break; - - case KeyCtrlN: /* ctrl-n */ - usehistory(&term, -1); - break; - - case KeyEsc: /* escape sequence */ - /* - * try to read two bytes representing the escape sequence. - * if we read less than 2 and we are in vi mode, interpret as command - * - * NOTE: we could do a timed read here - */ - switch(read(term.ifd,esc,2)){ - case 0: - if(mode.vi.on){ - if(mode.vi.insert){ - normalmode(term.ofd); - if(term.edit.pos > 0){ - --term.edit.pos; - refreshline(&term); - } - continue; - } - } - case 1: - if(mode.vi.on){ - if(mode.vi.insert){ - normalmode(term.ofd); - if(vi(&term,esc[0]) < 0){ - term.edit.len = -1; - goto finish; - } - continue; - } - } - default: // 2 - ; - } - - /* ESC [ sequences. */ - if(esc[0] == '['){ - if(0 <= esc[1] && esc[1] <= '9'){ - /* extended escape, read additional byte. */ - if(read(term.ifd,esc+2,1) == -1) - break; - - if(esc[2] == '~'){ - switch(esc[1]){ - case '3': /* delete key. */ - delete(&term, left(&term,1)); - break; - } - } - }else{ - switch(esc[1]) { - case 'A': /* up */ - usehistory(&term, +1); - break; - case 'B': /* down */ - usehistory(&term, -1); - break; - case 'C': /* right */ - move(&term, right(&term, 1)); - break; - case 'D': /* left */ - move(&term, left(&term, 1)); - break; - case 'H': /* home */ - move(&term, HOME(term)); - break; - case 'F': /* end*/ - move(&term, END(term)); - break; - } - } - } - /* ESC O sequences. */ - else if(esc[0] == 'O'){ - switch(esc[1]) { - case 'H': /* home */ - move(&term, HOME(term)); - break; - case 'F': /* end*/ - move(&term, END(term)); - break; - } - } - break; - - default: - if(mode.vi.on && !mode.vi.insert && n == 1){ - if(vi(&term,c[0]) < 0){ - term.edit.len = -1; - goto finish; - } - }else if(!insertrune(&term,n,c)){ - term.edit.len = -1; - goto finish; - } - - break; - - case KeyCtrlU: /* Ctrl+u, delete the whole line. */ - buf[0] = '\0'; - term.edit.pos = term.edit.len = 0; - term.cursor.pos = term.cursor.len = 0; - refreshline(&term); - break; - - case KeyCtrlK: /* Ctrl+k, delete from current to end of line. */ - buf[term.edit.pos] = '\0'; - term.edit.len = term.edit.pos; - term.cursor.len = term.cursor.pos; - refreshline(&term); - break; - - case KeyCtrlA: /* Ctrl+a, go to the start of the line */ - move(&term, HOME(term)); - break; - - case KeyCtrlE: /* ctrl+e, go to the end of the line */ - move(&term, END(term)); - break; - - case KeyCtrlL: /* ctrl+term, clear screen */ - clear(); - refreshline(&term); - break; - - case KeyCtrlW: /* ctrl+w, delete previous word */ - delete(&term, prevword(&term,1)); - break; - } - } -finish: - efree(term.yank.buf); - return term.edit.len; -} - -/* - * this special mode is used by linenoise in order to print scan codes - * on screen for debugging / development purposes. It is implemented - * by the linenoise_example program using the --keycodes option. - */ -void -printkeycode(void) -{ - int n; - char c, quit[4]; - - printf("entering debugging mode. printing key codes.\n" - "press keys to see scan codes. type 'quit' at any time to exit.\n"); - - if(!enterraw(0)) - return; - - memset(quit,' ',4); - - for(;;){ - n = read(0,&c,1); - if(n <= 0) - continue; - memmove(quit,quit+1,sizeof(quit)-1); // shift string to left - quit[arrlen(quit)-1] = c; /* Insert current char on the right. */ - - if(memcmp(quit,"quit",sizeof(quit)) == 0) - break; - - printf("'%c' %02x (%d) (type quit to exit)\n", isprint(c) ? c : '?', (int)c, (int)c); - printf("\r"); /* go to left edge manually, we are in raw mode. */ - fflush(stdout); - } - exitraw(0); -} - -/* - * this function calls the line editing function edit() using the stdin set in raw mode - */ -static -int -raw(char *buf, intptr len, char *prompt) -{ - int n; - - if(!len){ - errno = EINVAL; - return -1; - } - - // XXX: should we not hardcode stdin and stdout fd? - if(!enterraw(0)) return -1; - n = interact(0, 1, buf, len, prompt); - exitraw(0); - - return n; -} - -/* - * called when readline() is called with the standard - * input file descriptor not attached to a TTY. For example when the - * program is called in pipe or with a file redirected to its standard input - * in this case, we want to be able to return the line regardless of its length - */ -static -int -notty(void) -{ - int c; - - for(;;){ - c = fgetc(stdin); - put(&runner->cmd.io, c); - } -} - -void -enablevi(void) -{ - mode.vi.on = 1; - insertmode(1); -} - -/* - * The high level function that is the main API. - * This function checks if the terminal has basic capabilities and later - * either calls the line editing function or uses dummy fgets() so that - * you will be able to type something even in the most desperate of the - * conditions. - */ -int -readline(char *prompt) -{ - int n; - - // reset the command buffer - runner->cmd.io->e = runner->cmd.io->b = runner->cmd.io->buf; - - if(!shell.interactive) - return notty(); - - if((n = raw(runner->cmd.io->e, runner->cmd.io->cap-1, prompt)) == -1) - return 0; - runner->cmd.io->e += n; - - /* insert a newline character at the end */ - put(&runner->cmd.io, '\n'); - - return 1; -} - -/* At exit we'll try to fix the terminal to the initial conditions. */ -static -void -doatexit(void) -{ - exitraw(0); - normalcursor(1); -} diff --git a/sys/cmd/rc/io.c b/sys/cmd/rc/io.c deleted file mode 100644 index dc81c2e..0000000 --- a/sys/cmd/rc/io.c +++ /dev/null @@ -1,437 +0,0 @@ -#include "rc.h" -#include "parse.h" - -#define CAP0 512 - -Io* -openfd(int fd) -{ - Io *io = emalloc(sizeof(*io) + CAP0); - - io->fd = fd; - io->cap = CAP0; - io->b = io->e = io->buf; - io->s = nil; - - return io; -} - -Io* -openstr(void) -{ - char *s; - Io *io = emalloc(sizeof(*io) + CAP0); - - io->fd = -1; - io->cap = CAP0; - io->b = io->s = emalloc(101); - io->e = io->b+100; - - for(s = io->b; s<=io->e; s++) - *s=0; - - return io; -} - -#if 0 -/* - * open a corebuffer to read. EOF occurs after reading len characters from buf - */ - -Io* -opencore(char *s, int len) -{ - Io *io = emalloc(sizeof(*io)); - char *buf = emalloc(len); - io->fd = -1 /*open("/dev/null", 0)*/; - io->b = io->s = buf; - io->e = buf+len; - memcpy(buf, s, len); - - return io; -} -#endif - -void -iorewind(Io *io) -{ - if(io->fd==-1) - io->b = io->s; - else{ - io->b = io->e = io->buf; - lseek(io->fd, 0L, 0); - } -} - -void -terminate(Io *io) -{ - if(io->fd>=0) - close(io->fd); - if(io->s) - efree(io->s); - - efree((char *)io); -} - -static -int -refill(Io *io) -{ - int n; - - if(io->fd==-1 || (n = read(io->fd, io->buf, io->cap))<=0) - return EOF; - - io->b = io->buf; - io->e = io->buf+n; - - return *io->b++&0xff; -} - - -void -flush(Io *io) -{ - int n; - char *s; - - if(io->s){ - n = io->e-io->s; - io->s = realloc(io->s, n+101); - if(io->s==0) - panicf("Can't realloc %d bytes in flush!", n+101); - io->b = io->s+n; - io->e = io->b+100; - for(s = io->b;s<=io->e;s++) *s='\0'; - }else{ - n = io->b-io->buf; - if(n && write(io->fd, io->buf, n) < 0) - write(3, "write error\n", 12); - io->b = io->buf; - io->e = io->buf + io->cap; - } -} - - -static -void -printchar(Io *io, int c) -{ - if(io->b==io->e) - flush(io); - - *io->b++=c; -} - -void -printquote(Io *io, char *s) -{ - printchar(io, '\''); - for(;*s;s++) - if(*s=='\'') - print(io, "''"); - else printchar(io, *s); - printchar(io, '\''); -} - -void -printstr(Io *io, char *s) -{ - if(s==0) - s="(null)"; - while(*s) printchar(io, *s++); -} - -void -printword(Io *io, char *s) -{ - char *t; - - for(t = s;*t;t++) - if(!iswordchar(*t)) - break; - - if(t==s || *t) - printquote(io, s); - else - printstr(io, s); -} - -void -printptr(Io *io, void *v) -{ - int n; - uintptr p; - - p = (uintptr)v; - if(sizeof(uintptr) == sizeof(uvlong) && p>>32) - for(n = 60;n>=32;n-=4) printchar(io, "0123456789ABCDEF"[(p>>n)&0xF]); - - for(n = 28;n>=0;n-=4) printchar(io, "0123456789ABCDEF"[(p>>n)&0xF]); -} - -static -void -printint(Io *io, int n) -{ - if(n<0){ - if(n!=INT_MIN){ - printchar(io, '-'); - printint(io, -n); - return; - } - /* n is two's complement minimum integer */ - n = -(INT_MIN+1); - printchar(io, '-'); - printint(io, n/10); - printchar(io, n%10+'1'); - return; - } - if(n>9) - printint(io, n/10); - printchar(io, n%10+'0'); -} - -static -void -printoct(Io *io, unsigned n) -{ - if(n>7) - printoct(io, n>>3); - printchar(io, (n&7)+'0'); -} - -static -void -printval(Io *io, Word *a) -{ - if(a){ - while(a->link && a->link->str){ - printword(io, a->str); - printchar(io, ' '); - a = a->link; - } - printword(io, a->str); - } -} - -#define C0 t->child[0] -#define C1 t->child[1] -#define C2 t->child[2] - -static -void -printtree(Io *io, Tree *t) -{ - if(!t) - return; - - switch(t->type){ - default: print(io, "bad(%d)[%p %p %p]", t->type, C0, C1, C2); break; - case '$': print(io,"$%t",C0); break; - case '&': print(io,"%t&",C0); break; - case '^': print(io,"%t^%t",C0,C1); break; - case '`': print(io,"`%t",C0); break; - - case Tbasic: print(io, "%t", C0); break; - case Tbang: print(io, "!%t", C0); break; - case Tblock: print(io, "{%t}", C0); break; - case Tcount: print(io, "$#%t", C0); break; - case Tparen: print(io, "(%t)", C0); break; - case Tjoin: print(io,"$\"%t",C0); break; - case Tindex: print(io, "%t(%t)",C0); break; - case Tsubshell: print(io, "@ %t",C0); break; - //case Ttwiddle: print(io, "~ %t %t", C0, C1); break; - - case Toror: - case Tandand: - - case Targs: - if(!C0) - print(io, "%t", C1); - else if(!C1) - print(io, "%t", C0); - else - print(io, "%t %t", C0, C1); - break; - - case ';': - if(C0){ - if(C1) - print(io, "%t;%t", C0, C1); - else - print(io, "%t", C0); - }else - print(io, "%t", C1); - break; - - case Twords: - if(C0) - print(io, "%t", C0); - print(io, "%t", C1); - - case Tword: - if(t->quoted) - print(io, "%Q", t->str); - print(io, "%q", t->str); - break; - - case '=': - print(io, "%t=%t", C0, C1); - if(C2) - print(io, " %t", C2); - break; - - case Tdup: - if(t->redir.type == Rdupfd) - print(io, ">[%d=%d]", t->redir.fd[1], t->redir.fd[0]); - else - print(io, ">[%d=]", t->redir.fd[0]); - print(io, "%t", C1); - break; - - case Tredir: - switch(t->redir.type){ - case Rhere: - printchar(io, '<'); - case Rread: - printchar(io, '<'); - goto readfd; - case Rrdwr: - printchar(io, '<'); - printchar(io, '>'); - readfd: - if(t->redir.fd[0]!=0) - print(io, "[%d]", t->redir.fd[0]); - break; - case Rappend: - printchar(io, '>'); - goto writefd; - case Rwrite: - printchar(io, '>'); - printchar(io, '>'); - writefd: - if(t->redir.fd[0]!=1) - print(io, "[%d]", t->redir.fd[0]); - break; - } - print(io, "%t", C0); - if(C1) - print(io, " %t", C1); - break; - - case Tpipe: - print(io, "%t|", C0); - if(t->redir.fd[1]==0){ - if(t->redir.fd[0]!=1) - print(io, "[%d]", t->redir.fd[0]); - } - else - print(io, "[%d=%d]", t->redir.fd[0], t->redir.fd[1]); - print(io, "%t", C1); - break; - } -} - -#undef C0 -#undef C1 -#undef C2 - -// ----------------------------------------------------------------------- -// exports - -/* readers */ -int -get(Io *io) -{ - if(io->b==io->e) - return refill(io); - - return *io->b++ & 0xFF; -} - -/* writers */ -int -put(Io **iop, char c) -{ - int nb, ne, nc; - Io *io = *iop; - char *e = io->b + io->cap; - - if(io->e == e){ - nb = io->b - io->buf; - ne = io->e - io->buf; - nc = 2*io->cap; - - if(!(io = erealloc(io, sizeof(*io)+nc))) - return 0; - - io->b = io->buf + nb; - io->e = io->buf + ne; - io->cap = nc; - - *iop = io; - } - - *io->e++ = c; - return 1; -} - -/* printers */ -static int pfmtnest; - -void -print(Io *io, char *fmt, ...) -{ - va_list args; - char err[ERRMAX]; - - va_start(args, fmt); - pfmtnest++; - - for(;*fmt;fmt++) - if(*fmt!='%') - printchar(io, *fmt); - else - switch(*++fmt){ - case '\0': - va_end(args); - return; - case 'c': - printchar(io, va_arg(args, int)); - break; - case 'd': - printint(io, va_arg(args, int)); - break; - case 'o': - printoct(io, va_arg(args, unsigned)); - break; - case 'p': - printptr(io, va_arg(args, void*)); - break; - case 'Q': - printquote(io, va_arg(args, char *)); - break; - case 'q': - printword(io, va_arg(args, char *)); - break; - case 's': - printstr(io, va_arg(args, char *)); - break; - case 't': - printtree(io, va_arg(args, struct Tree *)); - break; - case 'v': - printval(io, va_arg(args, struct Word *)); - break; - default: - printchar(io, *fmt); - break; - } - - va_end(args); - - if(--pfmtnest==0) - flush(io); -} diff --git a/sys/cmd/rc/job.c b/sys/cmd/rc/job.c deleted file mode 100644 index 1587951..0000000 --- a/sys/cmd/rc/job.c +++ /dev/null @@ -1,91 +0,0 @@ -#include "rc.h" - -#include -#include - -// ----------------------------------------------------------------------- -// exports - -Thread * -getjob(int pid, int *index) -{ - int i; - Thread *job; - for(i=0,job=shell.jobs; job && job->pid != pid; i++, job=job->link) - ; - - return job; -} - -void -report(Thread *job, int index) -{ - switch(job->wait.status){ - case Pdone: - print(shell.err, "job %d [%d]: done\n", index, job->pid); - break; - case Pstop: - print(shell.err, "job %d [%d]: suspended\n", index, job->pid); - break; - case Pagain: - print(shell.err, "job %d [%d]: continued\n", index, job->pid); - break; - case Prun: - print(shell.err, "job %d [%d]: running\n", index, job->pid); - break; - default: - fatal("bad wait status: %d\n", job->wait.status); - } -} - -void -wakeup(Thread *job) -{ - int i; - job->wait.status = Prun; - for(i=0; i < job->wait.len; i++){ - if(job->wait.on[i].status == Pstop) - job->wait.on[i].status = Prun; - } - - tcsetpgrp(0, job->pgid); -} - -void -foreground(Thread *job, int now) -{ - Thread *caller = job->caller; - if(now){ - if(kill(-job->pgid, SIGCONT) < 0) - perror("kill[SIGCONT]"); - } - - waitall(job); - /* - * reset state if we have a caller - * otherwise we will exit anyways - */ - if(caller && caller->flag.user){ - tcsetpgrp(0, caller->pid); - job->flag.user = 1; - } -} - -void -addjob(Thread *job) -{ - job->link = shell.jobs; - shell.jobs = job; - job->wait.status = Prun; -} - -void -deljob(Thread *job) -{ - Thread **jp; - - for(jp = &shell.jobs; *jp && *jp != job; jp = &(*jp)->link) - ; - - *jp = job->link; -} diff --git a/sys/cmd/rc/lex.c b/sys/cmd/rc/lex.c deleted file mode 100644 index 9ca2453..0000000 --- a/sys/cmd/rc/lex.c +++ /dev/null @@ -1,394 +0,0 @@ -#include "rc.h" -#include "parse.h" - -static int advance(void); - -// ----------------------------------------------------------------------- -// lexer - -struct Lexer -{ - int c[2]; - ushort doprompt; - ushort hadword; - ushort haddollar; - ushort inquote; - char buf[BUFSIZ]; -}; - -static struct Lexer lexer = { .c={0, EOF}, .doprompt=1 }; - -#define put1(b) lexer.buf[0] = (b), lexer.buf[1] = 0; -#define put2(b0,b1) lexer.buf[0] = (b0), lexer.buf[1] = (b1), lexer.buf[2] = 0; -#define put3(b0,b1,b2) lexer.buf[0] = (b0), lexer.buf[1] = (b1), lexer.buf[2] = b2, lexer.buf[3] = 0; - -void -yyerror(const char *msg) -{ - print(shell.err, "rc:%d: ", runner->line); - - if(lexer.buf[0] && lexer.buf[0]!='\n') - print(shell.err, "%q: ", lexer.buf); - - print(shell.err, "%s\n", msg); - flush(shell.err); - - lexer.hadword = 0; - lexer.haddollar = 0; - - /* consume remaining tokens */ - while(lexer.c[0] !='\n' && lexer.c[0] != EOF) - advance(); -} - -int -readc(void) -{ - int c; - static int peek = EOF; - - if(peek!=EOF){ - c = peek; - peek = EOF; - return c; - } - - if(runner->flag.eof) - return EOF; - - if(!prompt(&lexer.doprompt)) - exit(1); // XXX: hack for signal handling right now... - - c = get(runner->cmd.io); - lexer.doprompt = lexer.doprompt || c=='\n' || c==EOF; - - if(c==EOF) - runner->flag.eof = 1; - - return c; -} - -static -int -peekc(void) -{ - if(lexer.c[1] == EOF) - lexer.c[1] = readc(); - - return lexer.c[1]; -} - -static -int -advance(void) -{ - int c = peekc(); - lexer.c[0] = lexer.c[1], lexer.c[1] = EOF; - - return c; -} - -static -void -skipws(void) -{ - int c; - for(;;){ - c = peekc(); - if(c== ' ' || c == '\t') - advance(); - else - return; - } -} - -static -void -skipnl(void) -{ - int c; - for(;;){ - c = peekc(); - if(c== ' ' || c == '\t' || c == '\n') - advance(); - else - return; - } -} - -static -int -nextis(int c) -{ - if(peekc()==c){ - advance(); - return 1; - } - return 0; -} - -static -char * -putbyte(char *buf, int c) -{ - if(!buf) - return buf; - - if(buf == arrend(lexer.buf)){ - fatal("lexer: out of buffer space"); - return nil; - } - *buf++ = c; - return buf; -} - -static -char * -putrune(char *buf, int c) -{ - buf = putbyte(buf, c); - if(utf8·onebyte(c)) - return buf; - if(utf8·twobyte(c)) - return putbyte(buf,advance()); - if(utf8·threebyte(c)){ - buf = putbyte(buf,advance()); - return putbyte(buf,advance()); - } - if(utf8·fourbyte(c)){ - buf = putbyte(buf,advance()); - buf = putbyte(buf,advance()); - return putbyte(buf,advance()); - } - fatal("malformed utf8 stream"); - - return nil; -} - -// ----------------------------------------------------------------------- -// exported functions - -// TODO: turn into static tables -int -iswordchar(int c) -{ - return !strchr("\n \t#;&|^$=`'{}()<>", c) && c!=EOF; -} - -int -isidentchar(int c) -{ - return c>' ' && !strchr("!\"#$%&'()+,-./:;<=>?@[\\]^`{|}~", c); -} - -int -yylex(void) -{ - int c, d = peekc(); - Tree *node; - char *w = lexer.buf; - - yylval.tree = nil; - - /* inject tokens */ - if(lexer.hadword){ - lexer.hadword = 0; - if(d=='('){ - advance(); - strcpy(lexer.buf, "( [Tindex]"); - return Tindex; - } - if(iswordchar(d) || d=='\'' || d=='`' || d=='$' || d=='"'){ - strcpy(lexer.buf, "^"); - return '^'; - } - } - - lexer.inquote = 0; - - skipws(); - switch(c=advance()){ - case EOF: - lexer.haddollar = 0; - put3('E','O','F'); - return EOF; - - case '$': - lexer.haddollar = 1; - if(nextis('#')){ - put2('$','#'); - return Tcount; - } - if(nextis('^')){ - put2('$','^'); - return Tjoin; - } - put1('$'); - return '$'; - - case '@': - lexer.haddollar = 0; - put1('@'); - return Tsubshell; - - case '!': - lexer.haddollar = 0; - put1('!'); - return Tbang; - - case '&': - lexer.haddollar = 0; - if(nextis('&')){ - put2('&','&'); - return Tandand; - } - put1('&'); - return '&'; - - case '|': - lexer.haddollar = 0; - if(nextis('|')){ - put2('|','|'); - return Toror; - } - node = maketree(); - *w++ = '|'; - - node->type = Tpipe; - node->redir.fd[0] = 1; - node->redir.fd[1] = 0; - goto redir; - - case '>': - lexer.haddollar = 0; - node = maketree(); - *w++ = '>'; - node->type = Tredir; - - if(nextis('>')){ - node->redir.type = Rappend; - *w++ = '>'; - }else - node->redir.type = Rwrite; - node->redir.fd[0] = 1; - goto redir; - - case '<': - lexer.haddollar = 0; - node = maketree(); - *w++ = '<'; - node->type = Tredir; - - if(nextis('<')){ - node->redir.type = Rhere; - *w++ = '<'; - }else if(nextis('>')){ - node->redir.type = Rrdwr; - *w++ = '>'; - }else{ - node->redir.type = Rread; - } - node->redir.fd[0] = 0; - /* fallthrough */ - redir: - if(nextis('[')){ - *w++='['; - c = advance(); - *w++ = c; - if(c < '0' || '9' < c){ - badredir: - *w = 0; - yyerror(node->type == Tpipe ? "pipe syntax" : "redirection syntax"); - return EOF; - } - node->redir.fd[0] = 0; - do{ - node->redir.fd[0] = 10*node->redir.fd[0]+(c-'0'); - *w++ = c; - c = advance(); - }while('0'<=c && c<='9'); - - if(c == '='){ - *w++ = '='; - if(node->type==Tredir) - node->type = Tdup; - c = advance(); - } - if(c < '0' || '9' < c){ - if(node->type == Tpipe) - goto badredir; - node->redir.type = Rclose; - }else{ - node->redir.type = Rdupfd; - node->redir.fd[1] = node->redir.fd[0]; - node->redir.fd[0] = 0; - do{ - node->redir.fd[0] = 10*node->redir.fd[0]+(c-'0'); - *w++ = c; - c = advance(); - }while('0'<=c && c<='9'); - } - if(c != ']' || (node->type == Tdup && (node->redir.type = Rhere || node->redir.type == Rappend))) - goto badredir; - *w++ = ']'; - } - *w++ = 0; - yylval.tree = node; - - return node->type; - - case '\'': - lexer.hadword = 1; - lexer.inquote = 1; - lexer.haddollar = 0; - for(;;){ - c = advance(); - if(c==EOF) - break; - - if(c=='\''){ - if(peekc()!='\'') - break; - advance(); - } - w = putrune(w, c); - } - if(w) - *w = 0; - node = token(Tword, lexer.buf); - node->quoted = 1; - return node->type; - - default: - ; - } - if(!iswordchar(c)){ - put1(c); - lexer.haddollar = 0; - return c; - } - - for(;;){ - w = putrune(w, c); - c = peekc(); - if(lexer.haddollar ? !isidentchar(c) : !iswordchar(c)) - break; - advance(); - } - - lexer.hadword = 1; - lexer.haddollar = 0; - if(w) - *w = 0; - - node = token(Tword, lexer.buf); - if((c=iskeyword(lexer.buf))){ - node->type = c; - lexer.hadword = 0; - } - - node->quoted = 0; - - yylval.tree = node; - return node->type; -} diff --git a/sys/cmd/rc/main.c b/sys/cmd/rc/main.c deleted file mode 100644 index 2c0aa42..0000000 --- a/sys/cmd/rc/main.c +++ /dev/null @@ -1,66 +0,0 @@ -#include "rc.h" -#include "parse.h" -#include "exec.h" - -#include -#include - -// ----------------------------------------------------------------------- -// globals - -Thread *runner = nil; -Shell shell = { 0 }; - -// ----------------------------------------------------------------------- -// functions - -void -initshell(void) -{ - if((shell.interactive=isatty(0))){ - while(tcgetpgrp(0) != (shell.pid = getpgrp())) - kill(-shell.pid, SIGTTIN); - - /* ignore job control signals */ - signal(SIGINT, SIG_IGN); - signal(SIGQUIT, SIG_IGN); - signal(SIGTSTP, SIG_IGN); - signal(SIGTTIN, SIG_IGN); - signal(SIGTTOU, SIG_IGN); - /* - * NOTE: if SIGCHLD is set to SIG_IGN then - * 1. children that terminate do not become zombies - * 2. call a to wait() will block until all children have terminated - * 3. the call to wait will fail with errno == ECHILD - * see for discussion: - * https://stackoverflow.com/questions/1608017/no-child-process-error-from-waitpid-when-waiting-for-process-group - */ - // signal(SIGCHLD, SIG_IGN); - - /* take control */ - shell.pid = getpid(); - if(setpgid(shell.pid, shell.pid)<0) - fatal("could not put shell in its own process group"); - - tcsetpgrp(shell.pid, shell.pid); - } -} - -// ----------------------------------------------------------------------- -// main point of entry - -int -main(int argc, char *argv[]) -{ - shell.err = openfd(2); - - initenv(); - initpath(); - initkeywords(); - initshell(); - inithistory(); - - enablevi(); - xboot(argc, argv); - /* unreachable */ -} diff --git a/sys/cmd/rc/parse.c b/sys/cmd/rc/parse.c deleted file mode 100644 index 1b29d41..0000000 --- a/sys/cmd/rc/parse.c +++ /dev/null @@ -1,2059 +0,0 @@ -/* A Bison parser, made by GNU Bison 3.8.2. */ - -/* Bison implementation for Yacc-like parsers in C - - Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2021 Free Software Foundation, - Inc. - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . */ - -/* As a special exception, you may create a larger work that contains - part or all of the Bison parser skeleton and distribute that work - under terms of your choice, so long as that work isn't itself a - parser generator using the skeleton or a modified version thereof - as a parser skeleton. Alternatively, if you modify or redistribute - the parser skeleton itself, you may (at your option) remove this - special exception, which will cause the skeleton and the resulting - Bison output files to be licensed under the GNU General Public - License without this special exception. - - This special exception was added by the Free Software Foundation in - version 2.2 of Bison. */ - -/* C LALR(1) parser skeleton written by Richard Stallman, by - simplifying the original so-called "semantic" parser. */ - -/* DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual, - especially those whose name start with YY_ or yy_. They are - private implementation details that can be changed or removed. */ - -/* All symbols defined below should begin with yy or YY, to avoid - infringing on user name space. This should be done even for local - variables, as they might otherwise be expanded by user macros. - There are some unavoidable exceptions within include files to - define necessary library symbols; they are noted "INFRINGES ON - USER NAME SPACE" below. */ - -/* Identify Bison output, and Bison version. */ -#define YYBISON 30802 - -/* Bison version string. */ -#define YYBISON_VERSION "3.8.2" - -/* Skeleton name. */ -#define YYSKELETON_NAME "yacc.c" - -/* Pure parsers. */ -#define YYPURE 0 - -/* Push parsers. */ -#define YYPUSH 0 - -/* Pull parsers. */ -#define YYPULL 1 - - - - -/* First part of user prologue. */ -#line 7 "sys/cmd/rc/syntax.y" - - #include "rc.h" - - int yylex(void); - void yyerror(const char *); - -#line 78 "sys/cmd/rc/parse.c" - -# ifndef YY_CAST -# ifdef __cplusplus -# define YY_CAST(Type, Val) static_cast (Val) -# define YY_REINTERPRET_CAST(Type, Val) reinterpret_cast (Val) -# else -# define YY_CAST(Type, Val) ((Type) (Val)) -# define YY_REINTERPRET_CAST(Type, Val) ((Type) (Val)) -# endif -# endif -# ifndef YY_NULLPTR -# if defined __cplusplus -# if 201103L <= __cplusplus -# define YY_NULLPTR nullptr -# else -# define YY_NULLPTR 0 -# endif -# else -# define YY_NULLPTR ((void*)0) -# endif -# endif - -#include "parse.h" -/* Symbol kind. */ -enum yysymbol_kind_t -{ - YYSYMBOL_YYEMPTY = -2, - YYSYMBOL_YYEOF = 0, /* "end of file" */ - YYSYMBOL_YYerror = 1, /* error */ - YYSYMBOL_YYUNDEF = 2, /* "invalid token" */ - YYSYMBOL_Tfor = 3, /* Tfor */ - YYSYMBOL_Tin = 4, /* Tin */ - YYSYMBOL_Twhile = 5, /* Twhile */ - YYSYMBOL_Tif = 6, /* Tif */ - YYSYMBOL_Telse = 7, /* Telse */ - YYSYMBOL_Tswitch = 8, /* Tswitch */ - YYSYMBOL_Tcase = 9, /* Tcase */ - YYSYMBOL_Tcasebody = 10, /* Tcasebody */ - YYSYMBOL_Ttwiddle = 11, /* Ttwiddle */ - YYSYMBOL_Tbang = 12, /* Tbang */ - YYSYMBOL_Tsubshell = 13, /* Tsubshell */ - YYSYMBOL_Tfunc = 14, /* Tfunc */ - YYSYMBOL_Tredir = 15, /* Tredir */ - YYSYMBOL_Tdup = 16, /* Tdup */ - YYSYMBOL_Tpipe = 17, /* Tpipe */ - YYSYMBOL_Tindex = 18, /* Tindex */ - YYSYMBOL_Tbasic = 19, /* Tbasic */ - YYSYMBOL_Targs = 20, /* Targs */ - YYSYMBOL_Tword = 21, /* Tword */ - YYSYMBOL_Twords = 22, /* Twords */ - YYSYMBOL_Tparen = 23, /* Tparen */ - YYSYMBOL_Tblock = 24, /* Tblock */ - YYSYMBOL_25_ = 25, /* ')' */ - YYSYMBOL_Tandand = 26, /* Tandand */ - YYSYMBOL_Toror = 27, /* Toror */ - YYSYMBOL_28_n_ = 28, /* '\n' */ - YYSYMBOL_29_ = 29, /* '^' */ - YYSYMBOL_30_ = 30, /* '$' */ - YYSYMBOL_Tcount = 31, /* Tcount */ - YYSYMBOL_Tjoin = 32, /* Tjoin */ - YYSYMBOL_33_ = 33, /* '(' */ - YYSYMBOL_34_ = 34, /* '{' */ - YYSYMBOL_35_ = 35, /* '}' */ - YYSYMBOL_36_ = 36, /* ';' */ - YYSYMBOL_37_ = 37, /* '&' */ - YYSYMBOL_38_ = 38, /* '=' */ - YYSYMBOL_39_ = 39, /* '`' */ - YYSYMBOL_YYACCEPT = 40, /* $accept */ - YYSYMBOL_rc = 41, /* rc */ - YYSYMBOL_line = 42, /* line */ - YYSYMBOL_body = 43, /* body */ - YYSYMBOL_paren = 44, /* paren */ - YYSYMBOL_block = 45, /* block */ - YYSYMBOL_cmds = 46, /* cmds */ - YYSYMBOL_cmdsln = 47, /* cmdsln */ - YYSYMBOL_ifbody = 48, /* ifbody */ - YYSYMBOL_case = 49, /* case */ - YYSYMBOL_casebody = 50, /* casebody */ - YYSYMBOL_assign = 51, /* assign */ - YYSYMBOL_redir = 52, /* redir */ - YYSYMBOL_epilog = 53, /* epilog */ - YYSYMBOL_cmd = 54, /* cmd */ - YYSYMBOL_basic = 55, /* basic */ - YYSYMBOL_atom = 56, /* atom */ - YYSYMBOL_word = 57, /* word */ - YYSYMBOL_executable = 58, /* executable */ - YYSYMBOL_nonkeyword = 59, /* nonkeyword */ - YYSYMBOL_keyword = 60, /* keyword */ - YYSYMBOL_words = 61, /* words */ - YYSYMBOL_wordsnl = 62, /* wordsnl */ - YYSYMBOL_nl = 63 /* nl */ -}; -typedef enum yysymbol_kind_t yysymbol_kind_t; - - - - -#ifdef short -# undef short -#endif - -/* On compilers that do not define __PTRDIFF_MAX__ etc., make sure - and (if available) are included - so that the code can choose integer types of a good width. */ - -#ifndef __PTRDIFF_MAX__ -# include /* INFRINGES ON USER NAME SPACE */ -# if defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__ -# include /* INFRINGES ON USER NAME SPACE */ -# define YY_STDINT_H -# endif -#endif - -/* Narrow types that promote to a signed type and that can represent a - signed or unsigned integer of at least N bits. In tables they can - save space and decrease cache pressure. Promoting to a signed type - helps avoid bugs in integer arithmetic. */ - -#ifdef __INT_LEAST8_MAX__ -typedef __INT_LEAST8_TYPE__ yytype_int8; -#elif defined YY_STDINT_H -typedef int_least8_t yytype_int8; -#else -typedef signed char yytype_int8; -#endif - -#ifdef __INT_LEAST16_MAX__ -typedef __INT_LEAST16_TYPE__ yytype_int16; -#elif defined YY_STDINT_H -typedef int_least16_t yytype_int16; -#else -typedef short yytype_int16; -#endif - -/* Work around bug in HP-UX 11.23, which defines these macros - incorrectly for preprocessor constants. This workaround can likely - be removed in 2023, as HPE has promised support for HP-UX 11.23 - (aka HP-UX 11i v2) only through the end of 2022; see Table 2 of - . */ -#ifdef __hpux -# undef UINT_LEAST8_MAX -# undef UINT_LEAST16_MAX -# define UINT_LEAST8_MAX 255 -# define UINT_LEAST16_MAX 65535 -#endif - -#if defined __UINT_LEAST8_MAX__ && __UINT_LEAST8_MAX__ <= __INT_MAX__ -typedef __UINT_LEAST8_TYPE__ yytype_uint8; -#elif (!defined __UINT_LEAST8_MAX__ && defined YY_STDINT_H \ - && UINT_LEAST8_MAX <= INT_MAX) -typedef uint_least8_t yytype_uint8; -#elif !defined __UINT_LEAST8_MAX__ && UCHAR_MAX <= INT_MAX -typedef unsigned char yytype_uint8; -#else -typedef short yytype_uint8; -#endif - -#if defined __UINT_LEAST16_MAX__ && __UINT_LEAST16_MAX__ <= __INT_MAX__ -typedef __UINT_LEAST16_TYPE__ yytype_uint16; -#elif (!defined __UINT_LEAST16_MAX__ && defined YY_STDINT_H \ - && UINT_LEAST16_MAX <= INT_MAX) -typedef uint_least16_t yytype_uint16; -#elif !defined __UINT_LEAST16_MAX__ && USHRT_MAX <= INT_MAX -typedef unsigned short yytype_uint16; -#else -typedef int yytype_uint16; -#endif - -#ifndef YYPTRDIFF_T -# if defined __PTRDIFF_TYPE__ && defined __PTRDIFF_MAX__ -# define YYPTRDIFF_T __PTRDIFF_TYPE__ -# define YYPTRDIFF_MAXIMUM __PTRDIFF_MAX__ -# elif defined PTRDIFF_MAX -# ifndef ptrdiff_t -# include /* INFRINGES ON USER NAME SPACE */ -# endif -# define YYPTRDIFF_T ptrdiff_t -# define YYPTRDIFF_MAXIMUM PTRDIFF_MAX -# else -# define YYPTRDIFF_T long -# define YYPTRDIFF_MAXIMUM LONG_MAX -# endif -#endif - -#ifndef YYSIZE_T -# ifdef __SIZE_TYPE__ -# define YYSIZE_T __SIZE_TYPE__ -# elif defined size_t -# define YYSIZE_T size_t -# elif defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__ -# include /* INFRINGES ON USER NAME SPACE */ -# define YYSIZE_T size_t -# else -# define YYSIZE_T unsigned -# endif -#endif - -#define YYSIZE_MAXIMUM \ - YY_CAST (YYPTRDIFF_T, \ - (YYPTRDIFF_MAXIMUM < YY_CAST (YYSIZE_T, -1) \ - ? YYPTRDIFF_MAXIMUM \ - : YY_CAST (YYSIZE_T, -1))) - -#define YYSIZEOF(X) YY_CAST (YYPTRDIFF_T, sizeof (X)) - - -/* Stored state numbers (used for stacks). */ -typedef yytype_uint8 yy_state_t; - -/* State numbers in computations. */ -typedef int yy_state_fast_t; - -#ifndef YY_ -# if defined YYENABLE_NLS && YYENABLE_NLS -# if ENABLE_NLS -# include /* INFRINGES ON USER NAME SPACE */ -# define YY_(Msgid) dgettext ("bison-runtime", Msgid) -# endif -# endif -# ifndef YY_ -# define YY_(Msgid) Msgid -# endif -#endif - - -#ifndef YY_ATTRIBUTE_PURE -# if defined __GNUC__ && 2 < __GNUC__ + (96 <= __GNUC_MINOR__) -# define YY_ATTRIBUTE_PURE __attribute__ ((__pure__)) -# else -# define YY_ATTRIBUTE_PURE -# endif -#endif - -#ifndef YY_ATTRIBUTE_UNUSED -# if defined __GNUC__ && 2 < __GNUC__ + (7 <= __GNUC_MINOR__) -# define YY_ATTRIBUTE_UNUSED __attribute__ ((__unused__)) -# else -# define YY_ATTRIBUTE_UNUSED -# endif -#endif - -/* Suppress unused-variable warnings by "using" E. */ -#if ! defined lint || defined __GNUC__ -# define YY_USE(E) ((void) (E)) -#else -# define YY_USE(E) /* empty */ -#endif - -/* Suppress an incorrect diagnostic about yylval being uninitialized. */ -#if defined __GNUC__ && ! defined __ICC && 406 <= __GNUC__ * 100 + __GNUC_MINOR__ -# if __GNUC__ * 100 + __GNUC_MINOR__ < 407 -# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \ - _Pragma ("GCC diagnostic push") \ - _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"") -# else -# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \ - _Pragma ("GCC diagnostic push") \ - _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"") \ - _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"") -# endif -# define YY_IGNORE_MAYBE_UNINITIALIZED_END \ - _Pragma ("GCC diagnostic pop") -#else -# define YY_INITIAL_VALUE(Value) Value -#endif -#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN -# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN -# define YY_IGNORE_MAYBE_UNINITIALIZED_END -#endif -#ifndef YY_INITIAL_VALUE -# define YY_INITIAL_VALUE(Value) /* Nothing. */ -#endif - -#if defined __cplusplus && defined __GNUC__ && ! defined __ICC && 6 <= __GNUC__ -# define YY_IGNORE_USELESS_CAST_BEGIN \ - _Pragma ("GCC diagnostic push") \ - _Pragma ("GCC diagnostic ignored \"-Wuseless-cast\"") -# define YY_IGNORE_USELESS_CAST_END \ - _Pragma ("GCC diagnostic pop") -#endif -#ifndef YY_IGNORE_USELESS_CAST_BEGIN -# define YY_IGNORE_USELESS_CAST_BEGIN -# define YY_IGNORE_USELESS_CAST_END -#endif - - -#define YY_ASSERT(E) ((void) (0 && (E))) - -#if 1 - -/* The parser invokes alloca or malloc; define the necessary symbols. */ - -# ifdef YYSTACK_USE_ALLOCA -# if YYSTACK_USE_ALLOCA -# ifdef __GNUC__ -# define YYSTACK_ALLOC __builtin_alloca -# elif defined __BUILTIN_VA_ARG_INCR -# include /* INFRINGES ON USER NAME SPACE */ -# elif defined _AIX -# define YYSTACK_ALLOC __alloca -# elif defined _MSC_VER -# include /* INFRINGES ON USER NAME SPACE */ -# define alloca _alloca -# else -# define YYSTACK_ALLOC alloca -# if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS -# include /* INFRINGES ON USER NAME SPACE */ - /* Use EXIT_SUCCESS as a witness for stdlib.h. */ -# ifndef EXIT_SUCCESS -# define EXIT_SUCCESS 0 -# endif -# endif -# endif -# endif -# endif - -# ifdef YYSTACK_ALLOC - /* Pacify GCC's 'empty if-body' warning. */ -# define YYSTACK_FREE(Ptr) do { /* empty */; } while (0) -# ifndef YYSTACK_ALLOC_MAXIMUM - /* The OS might guarantee only one guard page at the bottom of the stack, - and a page size can be as small as 4096 bytes. So we cannot safely - invoke alloca (N) if N exceeds 4096. Use a slightly smaller number - to allow for a few compiler-allocated temporary stack slots. */ -# define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */ -# endif -# else -# define YYSTACK_ALLOC YYMALLOC -# define YYSTACK_FREE YYFREE -# ifndef YYSTACK_ALLOC_MAXIMUM -# define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM -# endif -# if (defined __cplusplus && ! defined EXIT_SUCCESS \ - && ! ((defined YYMALLOC || defined malloc) \ - && (defined YYFREE || defined free))) -# include /* INFRINGES ON USER NAME SPACE */ -# ifndef EXIT_SUCCESS -# define EXIT_SUCCESS 0 -# endif -# endif -# ifndef YYMALLOC -# define YYMALLOC malloc -# if ! defined malloc && ! defined EXIT_SUCCESS -void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */ -# endif -# endif -# ifndef YYFREE -# define YYFREE free -# if ! defined free && ! defined EXIT_SUCCESS -void free (void *); /* INFRINGES ON USER NAME SPACE */ -# endif -# endif -# endif -#endif /* 1 */ - -#if (! defined yyoverflow \ - && (! defined __cplusplus \ - || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))) - -/* A type that is properly aligned for any stack member. */ -union yyalloc -{ - yy_state_t yyss_alloc; - YYSTYPE yyvs_alloc; -}; - -/* The size of the maximum gap between one aligned stack and the next. */ -# define YYSTACK_GAP_MAXIMUM (YYSIZEOF (union yyalloc) - 1) - -/* The size of an array large to enough to hold all stacks, each with - N elements. */ -# define YYSTACK_BYTES(N) \ - ((N) * (YYSIZEOF (yy_state_t) + YYSIZEOF (YYSTYPE)) \ - + YYSTACK_GAP_MAXIMUM) - -# define YYCOPY_NEEDED 1 - -/* Relocate STACK from its old location to the new one. The - local variables YYSIZE and YYSTACKSIZE give the old and new number of - elements in the stack, and YYPTR gives the new location of the - stack. Advance YYPTR to a properly aligned location for the next - stack. */ -# define YYSTACK_RELOCATE(Stack_alloc, Stack) \ - do \ - { \ - YYPTRDIFF_T yynewbytes; \ - YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \ - Stack = &yyptr->Stack_alloc; \ - yynewbytes = yystacksize * YYSIZEOF (*Stack) + YYSTACK_GAP_MAXIMUM; \ - yyptr += yynewbytes / YYSIZEOF (*yyptr); \ - } \ - while (0) - -#endif - -#if defined YYCOPY_NEEDED && YYCOPY_NEEDED -/* Copy COUNT objects from SRC to DST. The source and destination do - not overlap. */ -# ifndef YYCOPY -# if defined __GNUC__ && 1 < __GNUC__ -# define YYCOPY(Dst, Src, Count) \ - __builtin_memcpy (Dst, Src, YY_CAST (YYSIZE_T, (Count)) * sizeof (*(Src))) -# else -# define YYCOPY(Dst, Src, Count) \ - do \ - { \ - YYPTRDIFF_T yyi; \ - for (yyi = 0; yyi < (Count); yyi++) \ - (Dst)[yyi] = (Src)[yyi]; \ - } \ - while (0) -# endif -# endif -#endif /* !YYCOPY_NEEDED */ - -/* YYFINAL -- State number of the termination state. */ -#define YYFINAL 56 -/* YYLAST -- Last index in YYTABLE. */ -#define YYLAST 478 - -/* YYNTOKENS -- Number of terminals. */ -#define YYNTOKENS 40 -/* YYNNTS -- Number of nonterminals. */ -#define YYNNTS 24 -/* YYNRULES -- Number of rules. */ -#define YYNRULES 73 -/* YYNSTATES -- Number of states. */ -#define YYNSTATES 129 - -/* YYMAXUTOK -- Last valid token kind. */ -#define YYMAXUTOK 283 - - -/* YYTRANSLATE(TOKEN-NUM) -- Symbol number corresponding to TOKEN-NUM - as returned by yylex, with out-of-bounds checking. */ -#define YYTRANSLATE(YYX) \ - (0 <= (YYX) && (YYX) <= YYMAXUTOK \ - ? YY_CAST (yysymbol_kind_t, yytranslate[YYX]) \ - : YYSYMBOL_YYUNDEF) - -/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM - as returned by yylex. */ -static const yytype_int8 yytranslate[] = -{ - 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 28, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 30, 2, 37, 2, - 33, 25, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 36, - 2, 38, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 29, 2, 39, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 34, 2, 35, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 1, 2, 3, 4, - 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, - 26, 27, 31, 32 -}; - -#if YYDEBUG -/* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ -static const yytype_uint8 yyrline[] = -{ - 0, 38, 38, 39, 42, 43, 46, 47, 50, 53, - 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, - 74, 77, 80, 81, 84, 85, 88, 89, 90, 91, - 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, - 102, 105, 106, 107, 110, 111, 114, 115, 118, 119, - 122, 123, 124, 125, 126, 127, 128, 132, 132, 132, - 132, 132, 132, 132, 132, 132, 132, 135, 136, 139, - 140, 141, 143, 145 -}; -#endif - -/** Accessing symbol of state STATE. */ -#define YY_ACCESSING_SYMBOL(State) YY_CAST (yysymbol_kind_t, yystos[State]) - -#if 1 -/* The user-facing name of the symbol whose (internal) number is - YYSYMBOL. No bounds checking. */ -static const char *yysymbol_name (yysymbol_kind_t yysymbol) YY_ATTRIBUTE_UNUSED; - -/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at YYNTOKENS, nonterminals. */ -static const char *const yytname[] = -{ - "\"end of file\"", "error", "\"invalid token\"", "Tfor", "Tin", - "Twhile", "Tif", "Telse", "Tswitch", "Tcase", "Tcasebody", "Ttwiddle", - "Tbang", "Tsubshell", "Tfunc", "Tredir", "Tdup", "Tpipe", "Tindex", - "Tbasic", "Targs", "Tword", "Twords", "Tparen", "Tblock", "')'", - "Tandand", "Toror", "'\\n'", "'^'", "'$'", "Tcount", "Tjoin", "'('", - "'{'", "'}'", "';'", "'&'", "'='", "'`'", "$accept", "rc", "line", - "body", "paren", "block", "cmds", "cmdsln", "ifbody", "case", "casebody", - "assign", "redir", "epilog", "cmd", "basic", "atom", "word", - "executable", "nonkeyword", "keyword", "words", "wordsnl", "nl", YY_NULLPTR -}; - -static const char * -yysymbol_name (yysymbol_kind_t yysymbol) -{ - return yytname[yysymbol]; -} -#endif - -#define YYPACT_NINF (-82) - -#define yypact_value_is_default(Yyn) \ - ((Yyn) == YYPACT_NINF) - -#define YYTABLE_NINF (-3) - -#define yytable_value_is_error(Yyn) \ - 0 - -/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing - STATE-NUM. */ -static const yytype_int16 yypact[] = -{ - 121, -17, -2, -2, 5, 439, 439, 343, -82, -82, - 343, 343, 343, -82, 439, -23, 45, 32, 11, 439, - 439, 439, 13, 158, -14, -82, 343, 439, -82, -82, - 343, 30, 30, -82, -82, -82, -82, -82, -82, -82, - -82, -82, -82, -82, 34, -82, -82, 47, -82, -82, - 195, 41, -82, 439, 54, -82, -82, -82, 11, -82, - -82, 30, 30, -82, -82, -82, -82, -82, -82, 34, - 343, 343, 19, 44, 375, 375, 4, 343, -82, -82, - -82, 34, -82, -82, -82, -82, 375, 375, 375, -82, - 34, -82, -82, -82, -82, 29, 77, -82, 29, -82, - -82, 269, -82, 30, 30, 306, 375, -82, 25, -82, - 34, -82, 29, 375, 407, 375, 29, -82, 407, 407, - 48, 54, 29, 232, -82, -82, -82, -82, -82 -}; - -/* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM. - Performed when YYTABLE does not specify something else to do. Zero - means the default is an error. */ -static const yytype_int8 yydefact[] = -{ - 26, 0, 0, 0, 0, 26, 26, 0, 22, 50, - 0, 0, 0, 69, 26, 0, 0, 0, 24, 26, - 26, 26, 4, 27, 41, 48, 0, 26, 72, 72, - 0, 34, 35, 57, 58, 59, 60, 61, 62, 63, - 64, 65, 66, 46, 23, 44, 45, 51, 54, 55, - 0, 0, 12, 26, 6, 56, 1, 3, 24, 28, - 5, 33, 32, 72, 72, 72, 10, 11, 43, 42, - 0, 0, 0, 0, 26, 26, 0, 0, 67, 53, - 70, 71, 9, 7, 13, 25, 26, 26, 26, 49, - 21, 67, 72, 8, 73, 38, 24, 39, 14, 72, - 47, 0, 29, 30, 31, 0, 26, 72, 0, 52, - 68, 72, 36, 26, 26, 26, 15, 67, 26, 26, - 0, 18, 37, 0, 20, 19, 40, 17, 16 -}; - -/* YYPGOTO[NTERM-NUM]. */ -static const yytype_int8 yypgoto[] = -{ - -82, -82, 75, -19, 93, -11, 18, -52, -82, -82, - -21, -82, -1, 42, 0, -82, -9, 28, -82, 2, - -82, -81, -82, -22 -}; - -/* YYDEFGOTO[NTERM-NUM]. */ -static const yytype_int8 yydefgoto[] = -{ - 0, 16, 17, 51, 28, 18, 52, 53, 97, 119, - 120, 20, 21, 59, 54, 23, 43, 110, 24, 25, - 46, 101, 50, 74 -}; - -/* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM. If - positive, shift that token. If negative, reduce the rule whose - number is the opposite. If YYTABLE_NINF, syntax error. */ -static const yytype_int16 yytable[] = -{ - 22, 47, 48, 49, 55, 31, 32, 75, 73, 45, - 105, 14, 45, 45, 45, 70, 26, 58, 19, 22, - 61, 62, 68, 91, 71, 45, 7, 8, 45, 99, - 63, 27, 45, 77, 83, 44, 123, 19, 30, 64, - 65, 86, 87, 88, 92, 56, 63, 63, 77, 66, - 67, 69, 45, 94, 72, 64, 65, 58, 76, 114, - 57, 89, 118, 77, 96, 78, 118, 118, 100, 93, - 106, 63, 45, 45, 95, 98, 82, 108, 81, 45, - 64, 65, 84, 126, 107, 113, 102, 103, 104, 115, - 66, 67, 7, 8, 60, 58, 29, 124, 125, 90, - 85, 0, 0, 45, 0, 0, 112, 45, 0, 0, - 0, 0, 0, 116, 121, 122, 0, 0, 121, 121, - 0, -2, 0, 0, 1, 45, 2, 3, 0, 4, - 0, 0, 0, 5, 6, 0, 7, 8, 0, 0, - 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, - 0, 10, 11, 12, 13, 14, 0, 0, 0, 0, - 15, 33, 34, 35, 36, 37, 38, 39, 0, 0, - 40, 41, 42, 7, 8, 0, 0, 0, 0, 9, - 0, 0, 0, 0, 0, 0, 0, 0, 10, 11, - 12, 13, 0, 0, 0, 0, 0, 15, 33, 34, - 35, 36, 37, 38, 39, 0, 0, 40, 41, 42, - 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, - 79, 0, 0, 80, 0, 10, 11, 12, 13, 0, - 0, 0, 0, 0, 15, 33, 34, 35, 36, 37, - 38, 39, 0, 0, 40, 41, 42, 0, 0, 0, - 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, - 127, 0, 10, 11, 12, 13, 0, 0, 128, 0, - 0, 15, 33, 34, 35, 36, 37, 38, 39, 0, - 0, 40, 41, 42, 0, 0, 0, 0, 0, 0, - 9, 0, 0, 0, 109, 0, 0, 0, 0, 10, - 11, 12, 13, 0, 0, 0, 0, 0, 15, 33, - 34, 35, 36, 37, 38, 39, 0, 0, 40, 41, - 42, 0, 0, 0, 0, 0, 0, 9, 0, 0, - 0, 111, 0, 0, 0, 0, 10, 11, 12, 13, - 0, 0, 0, 0, 0, 15, 33, 34, 35, 36, - 37, 38, 39, 0, 0, 40, 41, 42, 0, 0, - 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, - 0, 0, 0, 10, 11, 12, 13, 0, 1, 0, - 2, 3, 15, 4, 0, 0, 0, 5, 6, 0, - 7, 8, 0, 0, 0, 0, 9, 0, 0, 0, - 0, 0, 0, 94, 0, 10, 11, 12, 13, 14, - 1, 0, 2, 3, 15, 4, 117, 0, 0, 5, - 6, 0, 7, 8, 0, 0, 0, 0, 9, 0, - 0, 0, 0, 0, 0, 0, 0, 10, 11, 12, - 13, 14, 1, 0, 2, 3, 15, 4, 0, 0, - 0, 5, 6, 0, 7, 8, 0, 0, 0, 0, - 9, 0, 0, 0, 0, 0, 0, 0, 0, 10, - 11, 12, 13, 14, 0, 0, 0, 0, 15 -}; - -static const yytype_int8 yycheck[] = -{ - 0, 10, 11, 12, 15, 5, 6, 29, 27, 7, - 91, 34, 10, 11, 12, 29, 33, 18, 0, 19, - 20, 21, 23, 4, 38, 23, 15, 16, 26, 25, - 17, 33, 30, 29, 53, 7, 117, 19, 33, 26, - 27, 63, 64, 65, 25, 0, 17, 17, 29, 36, - 37, 23, 50, 28, 26, 26, 27, 58, 30, 34, - 28, 70, 114, 29, 75, 18, 118, 119, 77, 25, - 92, 17, 70, 71, 74, 75, 35, 99, 50, 77, - 26, 27, 28, 35, 7, 107, 86, 87, 88, 111, - 36, 37, 15, 16, 19, 96, 3, 118, 119, 71, - 58, -1, -1, 101, -1, -1, 106, 105, -1, -1, - -1, -1, -1, 113, 114, 115, -1, -1, 118, 119, - -1, 0, -1, -1, 3, 123, 5, 6, -1, 8, - -1, -1, -1, 12, 13, -1, 15, 16, -1, -1, - -1, -1, 21, -1, -1, -1, -1, -1, -1, -1, - -1, 30, 31, 32, 33, 34, -1, -1, -1, -1, - 39, 3, 4, 5, 6, 7, 8, 9, -1, -1, - 12, 13, 14, 15, 16, -1, -1, -1, -1, 21, - -1, -1, -1, -1, -1, -1, -1, -1, 30, 31, - 32, 33, -1, -1, -1, -1, -1, 39, 3, 4, - 5, 6, 7, 8, 9, -1, -1, 12, 13, 14, - -1, -1, -1, -1, -1, -1, 21, -1, -1, -1, - 25, -1, -1, 28, -1, 30, 31, 32, 33, -1, - -1, -1, -1, -1, 39, 3, 4, 5, 6, 7, - 8, 9, -1, -1, 12, 13, 14, -1, -1, -1, - -1, -1, -1, 21, -1, -1, -1, -1, -1, -1, - 28, -1, 30, 31, 32, 33, -1, -1, 36, -1, - -1, 39, 3, 4, 5, 6, 7, 8, 9, -1, - -1, 12, 13, 14, -1, -1, -1, -1, -1, -1, - 21, -1, -1, -1, 25, -1, -1, -1, -1, 30, - 31, 32, 33, -1, -1, -1, -1, -1, 39, 3, - 4, 5, 6, 7, 8, 9, -1, -1, 12, 13, - 14, -1, -1, -1, -1, -1, -1, 21, -1, -1, - -1, 25, -1, -1, -1, -1, 30, 31, 32, 33, - -1, -1, -1, -1, -1, 39, 3, 4, 5, 6, - 7, 8, 9, -1, -1, 12, 13, 14, -1, -1, - -1, -1, -1, -1, 21, -1, -1, -1, -1, -1, - -1, -1, -1, 30, 31, 32, 33, -1, 3, -1, - 5, 6, 39, 8, -1, -1, -1, 12, 13, -1, - 15, 16, -1, -1, -1, -1, 21, -1, -1, -1, - -1, -1, -1, 28, -1, 30, 31, 32, 33, 34, - 3, -1, 5, 6, 39, 8, 9, -1, -1, 12, - 13, -1, 15, 16, -1, -1, -1, -1, 21, -1, - -1, -1, -1, -1, -1, -1, -1, 30, 31, 32, - 33, 34, 3, -1, 5, 6, 39, 8, -1, -1, - -1, 12, 13, -1, 15, 16, -1, -1, -1, -1, - 21, -1, -1, -1, -1, -1, -1, -1, -1, 30, - 31, 32, 33, 34, -1, -1, -1, -1, 39 -}; - -/* YYSTOS[STATE-NUM] -- The symbol kind of the accessing symbol of - state STATE-NUM. */ -static const yytype_int8 yystos[] = -{ - 0, 3, 5, 6, 8, 12, 13, 15, 16, 21, - 30, 31, 32, 33, 34, 39, 41, 42, 45, 46, - 51, 52, 54, 55, 58, 59, 33, 33, 44, 44, - 33, 54, 54, 3, 4, 5, 6, 7, 8, 9, - 12, 13, 14, 56, 57, 59, 60, 56, 56, 56, - 62, 43, 46, 47, 54, 45, 0, 28, 52, 53, - 42, 54, 54, 17, 26, 27, 36, 37, 52, 57, - 29, 38, 57, 43, 63, 63, 57, 29, 18, 25, - 28, 57, 35, 43, 28, 53, 63, 63, 63, 56, - 57, 4, 25, 25, 28, 54, 45, 48, 54, 25, - 56, 61, 54, 54, 54, 61, 63, 7, 63, 25, - 57, 25, 54, 63, 34, 63, 54, 9, 47, 49, - 50, 54, 54, 61, 50, 50, 35, 28, 36 -}; - -/* YYR1[RULE-NUM] -- Symbol kind of the left-hand side of rule RULE-NUM. */ -static const yytype_int8 yyr1[] = -{ - 0, 40, 41, 41, 42, 42, 43, 43, 44, 45, - 46, 46, 47, 47, 48, 48, 49, 49, 50, 50, - 50, 51, 52, 52, 53, 53, 54, 54, 54, 54, - 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, - 54, 55, 55, 55, 56, 56, 57, 57, 58, 58, - 59, 59, 59, 59, 59, 59, 59, 60, 60, 60, - 60, 60, 60, 60, 60, 60, 60, 61, 61, 62, - 62, 62, 63, 63 -}; - -/* YYR2[RULE-NUM] -- Number of symbols on the right-hand side of rule RULE-NUM. */ -static const yytype_int8 yyr2[] = -{ - 0, 2, 0, 2, 1, 2, 1, 2, 3, 3, - 2, 2, 1, 2, 1, 4, 3, 3, 1, 2, - 2, 3, 1, 2, 0, 2, 0, 1, 2, 4, - 4, 4, 2, 2, 2, 2, 6, 8, 4, 4, - 8, 1, 2, 2, 1, 1, 1, 3, 1, 3, - 1, 2, 5, 3, 2, 2, 2, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, - 2, 2, 0, 2 -}; - - -enum { YYENOMEM = -2 }; - -#define yyerrok (yyerrstatus = 0) -#define yyclearin (yychar = YYEMPTY) - -#define YYACCEPT goto yyacceptlab -#define YYABORT goto yyabortlab -#define YYERROR goto yyerrorlab -#define YYNOMEM goto yyexhaustedlab - - -#define YYRECOVERING() (!!yyerrstatus) - -#define YYBACKUP(Token, Value) \ - do \ - if (yychar == YYEMPTY) \ - { \ - yychar = (Token); \ - yylval = (Value); \ - YYPOPSTACK (yylen); \ - yystate = *yyssp; \ - goto yybackup; \ - } \ - else \ - { \ - yyerror (YY_("syntax error: cannot back up")); \ - YYERROR; \ - } \ - while (0) - -/* Backward compatibility with an undocumented macro. - Use YYerror or YYUNDEF. */ -#define YYERRCODE YYUNDEF - - -/* Enable debugging if requested. */ -#if YYDEBUG - -# ifndef YYFPRINTF -# include /* INFRINGES ON USER NAME SPACE */ -# define YYFPRINTF fprintf -# endif - -# define YYDPRINTF(Args) \ -do { \ - if (yydebug) \ - YYFPRINTF Args; \ -} while (0) - - - - -# define YY_SYMBOL_PRINT(Title, Kind, Value, Location) \ -do { \ - if (yydebug) \ - { \ - YYFPRINTF (stderr, "%s ", Title); \ - yy_symbol_print (stderr, \ - Kind, Value); \ - YYFPRINTF (stderr, "\n"); \ - } \ -} while (0) - - -/*-----------------------------------. -| Print this symbol's value on YYO. | -`-----------------------------------*/ - -static void -yy_symbol_value_print (FILE *yyo, - yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep) -{ - FILE *yyoutput = yyo; - YY_USE (yyoutput); - if (!yyvaluep) - return; - YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN - YY_USE (yykind); - YY_IGNORE_MAYBE_UNINITIALIZED_END -} - - -/*---------------------------. -| Print this symbol on YYO. | -`---------------------------*/ - -static void -yy_symbol_print (FILE *yyo, - yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep) -{ - YYFPRINTF (yyo, "%s %s (", - yykind < YYNTOKENS ? "token" : "nterm", yysymbol_name (yykind)); - - yy_symbol_value_print (yyo, yykind, yyvaluep); - YYFPRINTF (yyo, ")"); -} - -/*------------------------------------------------------------------. -| yy_stack_print -- Print the state stack from its BOTTOM up to its | -| TOP (included). | -`------------------------------------------------------------------*/ - -static void -yy_stack_print (yy_state_t *yybottom, yy_state_t *yytop) -{ - YYFPRINTF (stderr, "Stack now"); - for (; yybottom <= yytop; yybottom++) - { - int yybot = *yybottom; - YYFPRINTF (stderr, " %d", yybot); - } - YYFPRINTF (stderr, "\n"); -} - -# define YY_STACK_PRINT(Bottom, Top) \ -do { \ - if (yydebug) \ - yy_stack_print ((Bottom), (Top)); \ -} while (0) - - -/*------------------------------------------------. -| Report that the YYRULE is going to be reduced. | -`------------------------------------------------*/ - -static void -yy_reduce_print (yy_state_t *yyssp, YYSTYPE *yyvsp, - int yyrule) -{ - int yylno = yyrline[yyrule]; - int yynrhs = yyr2[yyrule]; - int yyi; - YYFPRINTF (stderr, "Reducing stack by rule %d (line %d):\n", - yyrule - 1, yylno); - /* The symbols being reduced. */ - for (yyi = 0; yyi < yynrhs; yyi++) - { - YYFPRINTF (stderr, " $%d = ", yyi + 1); - yy_symbol_print (stderr, - YY_ACCESSING_SYMBOL (+yyssp[yyi + 1 - yynrhs]), - &yyvsp[(yyi + 1) - (yynrhs)]); - YYFPRINTF (stderr, "\n"); - } -} - -# define YY_REDUCE_PRINT(Rule) \ -do { \ - if (yydebug) \ - yy_reduce_print (yyssp, yyvsp, Rule); \ -} while (0) - -/* Nonzero means print parse trace. It is left uninitialized so that - multiple parsers can coexist. */ -int yydebug; -#else /* !YYDEBUG */ -# define YYDPRINTF(Args) ((void) 0) -# define YY_SYMBOL_PRINT(Title, Kind, Value, Location) -# define YY_STACK_PRINT(Bottom, Top) -# define YY_REDUCE_PRINT(Rule) -#endif /* !YYDEBUG */ - - -/* YYINITDEPTH -- initial size of the parser's stacks. */ -#ifndef YYINITDEPTH -# define YYINITDEPTH 200 -#endif - -/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only - if the built-in stack extension method is used). - - Do not make this value too large; the results are undefined if - YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH) - evaluated with infinite-precision integer arithmetic. */ - -#ifndef YYMAXDEPTH -# define YYMAXDEPTH 10000 -#endif - - -/* Context of a parse error. */ -typedef struct -{ - yy_state_t *yyssp; - yysymbol_kind_t yytoken; -} yypcontext_t; - -/* Put in YYARG at most YYARGN of the expected tokens given the - current YYCTX, and return the number of tokens stored in YYARG. If - YYARG is null, return the number of expected tokens (guaranteed to - be less than YYNTOKENS). Return YYENOMEM on memory exhaustion. - Return 0 if there are more than YYARGN expected tokens, yet fill - YYARG up to YYARGN. */ -static int -yypcontext_expected_tokens (const yypcontext_t *yyctx, - yysymbol_kind_t yyarg[], int yyargn) -{ - /* Actual size of YYARG. */ - int yycount = 0; - int yyn = yypact[+*yyctx->yyssp]; - if (!yypact_value_is_default (yyn)) - { - /* Start YYX at -YYN if negative to avoid negative indexes in - YYCHECK. In other words, skip the first -YYN actions for - this state because they are default actions. */ - int yyxbegin = yyn < 0 ? -yyn : 0; - /* Stay within bounds of both yycheck and yytname. */ - int yychecklim = YYLAST - yyn + 1; - int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; - int yyx; - for (yyx = yyxbegin; yyx < yyxend; ++yyx) - if (yycheck[yyx + yyn] == yyx && yyx != YYSYMBOL_YYerror - && !yytable_value_is_error (yytable[yyx + yyn])) - { - if (!yyarg) - ++yycount; - else if (yycount == yyargn) - return 0; - else - yyarg[yycount++] = YY_CAST (yysymbol_kind_t, yyx); - } - } - if (yyarg && yycount == 0 && 0 < yyargn) - yyarg[0] = YYSYMBOL_YYEMPTY; - return yycount; -} - - - - -#ifndef yystrlen -# if defined __GLIBC__ && defined _STRING_H -# define yystrlen(S) (YY_CAST (YYPTRDIFF_T, strlen (S))) -# else -/* Return the length of YYSTR. */ -static YYPTRDIFF_T -yystrlen (const char *yystr) -{ - YYPTRDIFF_T yylen; - for (yylen = 0; yystr[yylen]; yylen++) - continue; - return yylen; -} -# endif -#endif - -#ifndef yystpcpy -# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE -# define yystpcpy stpcpy -# else -/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in - YYDEST. */ -static char * -yystpcpy (char *yydest, const char *yysrc) -{ - char *yyd = yydest; - const char *yys = yysrc; - - while ((*yyd++ = *yys++) != '\0') - continue; - - return yyd - 1; -} -# endif -#endif - -#ifndef yytnamerr -/* Copy to YYRES the contents of YYSTR after stripping away unnecessary - quotes and backslashes, so that it's suitable for yyerror. The - heuristic is that double-quoting is unnecessary unless the string - contains an apostrophe, a comma, or backslash (other than - backslash-backslash). YYSTR is taken from yytname. If YYRES is - null, do not copy; instead, return the length of what the result - would have been. */ -static YYPTRDIFF_T -yytnamerr (char *yyres, const char *yystr) -{ - if (*yystr == '"') - { - YYPTRDIFF_T yyn = 0; - char const *yyp = yystr; - for (;;) - switch (*++yyp) - { - case '\'': - case ',': - goto do_not_strip_quotes; - - case '\\': - if (*++yyp != '\\') - goto do_not_strip_quotes; - else - goto append; - - append: - default: - if (yyres) - yyres[yyn] = *yyp; - yyn++; - break; - - case '"': - if (yyres) - yyres[yyn] = '\0'; - return yyn; - } - do_not_strip_quotes: ; - } - - if (yyres) - return yystpcpy (yyres, yystr) - yyres; - else - return yystrlen (yystr); -} -#endif - - -static int -yy_syntax_error_arguments (const yypcontext_t *yyctx, - yysymbol_kind_t yyarg[], int yyargn) -{ - /* Actual size of YYARG. */ - int yycount = 0; - /* There are many possibilities here to consider: - - If this state is a consistent state with a default action, then - the only way this function was invoked is if the default action - is an error action. In that case, don't check for expected - tokens because there are none. - - The only way there can be no lookahead present (in yychar) is if - this state is a consistent state with a default action. Thus, - detecting the absence of a lookahead is sufficient to determine - that there is no unexpected or expected token to report. In that - case, just report a simple "syntax error". - - Don't assume there isn't a lookahead just because this state is a - consistent state with a default action. There might have been a - previous inconsistent state, consistent state with a non-default - action, or user semantic action that manipulated yychar. - - Of course, the expected token list depends on states to have - correct lookahead information, and it depends on the parser not - to perform extra reductions after fetching a lookahead from the - scanner and before detecting a syntax error. Thus, state merging - (from LALR or IELR) and default reductions corrupt the expected - token list. However, the list is correct for canonical LR with - one exception: it will still contain any token that will not be - accepted due to an error action in a later state. - */ - if (yyctx->yytoken != YYSYMBOL_YYEMPTY) - { - int yyn; - if (yyarg) - yyarg[yycount] = yyctx->yytoken; - ++yycount; - yyn = yypcontext_expected_tokens (yyctx, - yyarg ? yyarg + 1 : yyarg, yyargn - 1); - if (yyn == YYENOMEM) - return YYENOMEM; - else - yycount += yyn; - } - return yycount; -} - -/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message - about the unexpected token YYTOKEN for the state stack whose top is - YYSSP. - - Return 0 if *YYMSG was successfully written. Return -1 if *YYMSG is - not large enough to hold the message. In that case, also set - *YYMSG_ALLOC to the required number of bytes. Return YYENOMEM if the - required number of bytes is too large to store. */ -static int -yysyntax_error (YYPTRDIFF_T *yymsg_alloc, char **yymsg, - const yypcontext_t *yyctx) -{ - enum { YYARGS_MAX = 5 }; - /* Internationalized format string. */ - const char *yyformat = YY_NULLPTR; - /* Arguments of yyformat: reported tokens (one for the "unexpected", - one per "expected"). */ - yysymbol_kind_t yyarg[YYARGS_MAX]; - /* Cumulated lengths of YYARG. */ - YYPTRDIFF_T yysize = 0; - - /* Actual size of YYARG. */ - int yycount = yy_syntax_error_arguments (yyctx, yyarg, YYARGS_MAX); - if (yycount == YYENOMEM) - return YYENOMEM; - - switch (yycount) - { -#define YYCASE_(N, S) \ - case N: \ - yyformat = S; \ - break - default: /* Avoid compiler warnings. */ - YYCASE_(0, YY_("syntax error")); - YYCASE_(1, YY_("syntax error, unexpected %s")); - YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); - YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); - YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); - YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); -#undef YYCASE_ - } - - /* Compute error message size. Don't count the "%s"s, but reserve - room for the terminator. */ - yysize = yystrlen (yyformat) - 2 * yycount + 1; - { - int yyi; - for (yyi = 0; yyi < yycount; ++yyi) - { - YYPTRDIFF_T yysize1 - = yysize + yytnamerr (YY_NULLPTR, yytname[yyarg[yyi]]); - if (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM) - yysize = yysize1; - else - return YYENOMEM; - } - } - - if (*yymsg_alloc < yysize) - { - *yymsg_alloc = 2 * yysize; - if (! (yysize <= *yymsg_alloc - && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM)) - *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM; - return -1; - } - - /* Avoid sprintf, as that infringes on the user's name space. - Don't have undefined behavior even if the translation - produced a string with the wrong number of "%s"s. */ - { - char *yyp = *yymsg; - int yyi = 0; - while ((*yyp = *yyformat) != '\0') - if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) - { - yyp += yytnamerr (yyp, yytname[yyarg[yyi++]]); - yyformat += 2; - } - else - { - ++yyp; - ++yyformat; - } - } - return 0; -} - - -/*-----------------------------------------------. -| Release the memory associated to this symbol. | -`-----------------------------------------------*/ - -static void -yydestruct (const char *yymsg, - yysymbol_kind_t yykind, YYSTYPE *yyvaluep) -{ - YY_USE (yyvaluep); - if (!yymsg) - yymsg = "Deleting"; - YY_SYMBOL_PRINT (yymsg, yykind, yyvaluep, yylocationp); - - YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN - YY_USE (yykind); - YY_IGNORE_MAYBE_UNINITIALIZED_END -} - - -/* Lookahead token kind. */ -int yychar; - -/* The semantic value of the lookahead symbol. */ -YYSTYPE yylval; -/* Number of syntax errors so far. */ -int yynerrs; - - - - -/*----------. -| yyparse. | -`----------*/ - -int -yyparse (void) -{ - yy_state_fast_t yystate = 0; - /* Number of tokens to shift before error messages enabled. */ - int yyerrstatus = 0; - - /* Refer to the stacks through separate pointers, to allow yyoverflow - to reallocate them elsewhere. */ - - /* Their size. */ - YYPTRDIFF_T yystacksize = YYINITDEPTH; - - /* The state stack: array, bottom, top. */ - yy_state_t yyssa[YYINITDEPTH]; - yy_state_t *yyss = yyssa; - yy_state_t *yyssp = yyss; - - /* The semantic value stack: array, bottom, top. */ - YYSTYPE yyvsa[YYINITDEPTH]; - YYSTYPE *yyvs = yyvsa; - YYSTYPE *yyvsp = yyvs; - - int yyn; - /* The return value of yyparse. */ - int yyresult; - /* Lookahead symbol kind. */ - yysymbol_kind_t yytoken = YYSYMBOL_YYEMPTY; - /* The variables used to return semantic value and location from the - action routines. */ - YYSTYPE yyval; - - /* Buffer for error messages, and its allocated size. */ - char yymsgbuf[128]; - char *yymsg = yymsgbuf; - YYPTRDIFF_T yymsg_alloc = sizeof yymsgbuf; - -#define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)) - - /* The number of symbols on the RHS of the reduced rule. - Keep to zero when no symbol should be popped. */ - int yylen = 0; - - YYDPRINTF ((stderr, "Starting parse\n")); - - yychar = YYEMPTY; /* Cause a token to be read. */ - - goto yysetstate; - - -/*------------------------------------------------------------. -| yynewstate -- push a new state, which is found in yystate. | -`------------------------------------------------------------*/ -yynewstate: - /* In all cases, when you get here, the value and location stacks - have just been pushed. So pushing a state here evens the stacks. */ - yyssp++; - - -/*--------------------------------------------------------------------. -| yysetstate -- set current state (the top of the stack) to yystate. | -`--------------------------------------------------------------------*/ -yysetstate: - YYDPRINTF ((stderr, "Entering state %d\n", yystate)); - YY_ASSERT (0 <= yystate && yystate < YYNSTATES); - YY_IGNORE_USELESS_CAST_BEGIN - *yyssp = YY_CAST (yy_state_t, yystate); - YY_IGNORE_USELESS_CAST_END - YY_STACK_PRINT (yyss, yyssp); - - if (yyss + yystacksize - 1 <= yyssp) -#if !defined yyoverflow && !defined YYSTACK_RELOCATE - YYNOMEM; -#else - { - /* Get the current used size of the three stacks, in elements. */ - YYPTRDIFF_T yysize = yyssp - yyss + 1; - -# if defined yyoverflow - { - /* Give user a chance to reallocate the stack. Use copies of - these so that the &'s don't force the real ones into - memory. */ - yy_state_t *yyss1 = yyss; - YYSTYPE *yyvs1 = yyvs; - - /* Each stack pointer address is followed by the size of the - data in use in that stack, in bytes. This used to be a - conditional around just the two extra args, but that might - be undefined if yyoverflow is a macro. */ - yyoverflow (YY_("memory exhausted"), - &yyss1, yysize * YYSIZEOF (*yyssp), - &yyvs1, yysize * YYSIZEOF (*yyvsp), - &yystacksize); - yyss = yyss1; - yyvs = yyvs1; - } -# else /* defined YYSTACK_RELOCATE */ - /* Extend the stack our own way. */ - if (YYMAXDEPTH <= yystacksize) - YYNOMEM; - yystacksize *= 2; - if (YYMAXDEPTH < yystacksize) - yystacksize = YYMAXDEPTH; - - { - yy_state_t *yyss1 = yyss; - union yyalloc *yyptr = - YY_CAST (union yyalloc *, - YYSTACK_ALLOC (YY_CAST (YYSIZE_T, YYSTACK_BYTES (yystacksize)))); - if (! yyptr) - YYNOMEM; - YYSTACK_RELOCATE (yyss_alloc, yyss); - YYSTACK_RELOCATE (yyvs_alloc, yyvs); -# undef YYSTACK_RELOCATE - if (yyss1 != yyssa) - YYSTACK_FREE (yyss1); - } -# endif - - yyssp = yyss + yysize - 1; - yyvsp = yyvs + yysize - 1; - - YY_IGNORE_USELESS_CAST_BEGIN - YYDPRINTF ((stderr, "Stack size increased to %ld\n", - YY_CAST (long, yystacksize))); - YY_IGNORE_USELESS_CAST_END - - if (yyss + yystacksize - 1 <= yyssp) - YYABORT; - } -#endif /* !defined yyoverflow && !defined YYSTACK_RELOCATE */ - - - if (yystate == YYFINAL) - YYACCEPT; - - goto yybackup; - - -/*-----------. -| yybackup. | -`-----------*/ -yybackup: - /* Do appropriate processing given the current state. Read a - lookahead token if we need one and don't already have one. */ - - /* First try to decide what to do without reference to lookahead token. */ - yyn = yypact[yystate]; - if (yypact_value_is_default (yyn)) - goto yydefault; - - /* Not known => get a lookahead token if don't already have one. */ - - /* YYCHAR is either empty, or end-of-input, or a valid lookahead. */ - if (yychar == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token\n")); - yychar = yylex (); - } - - if (yychar <= YYEOF) - { - yychar = YYEOF; - yytoken = YYSYMBOL_YYEOF; - YYDPRINTF ((stderr, "Now at end of input.\n")); - } - else if (yychar == YYerror) - { - /* The scanner already issued an error message, process directly - to error recovery. But do not keep the error token as - lookahead, it is too special and may lead us to an endless - loop in error recovery. */ - yychar = YYUNDEF; - yytoken = YYSYMBOL_YYerror; - goto yyerrlab1; - } - else - { - yytoken = YYTRANSLATE (yychar); - YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); - } - - /* If the proper action on seeing token YYTOKEN is to reduce or to - detect an error, take that action. */ - yyn += yytoken; - if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken) - goto yydefault; - yyn = yytable[yyn]; - if (yyn <= 0) - { - if (yytable_value_is_error (yyn)) - goto yyerrlab; - yyn = -yyn; - goto yyreduce; - } - - /* Count tokens shifted since error; after three, turn off error - status. */ - if (yyerrstatus) - yyerrstatus--; - - /* Shift the lookahead token. */ - YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); - yystate = yyn; - YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN - *++yyvsp = yylval; - YY_IGNORE_MAYBE_UNINITIALIZED_END - - /* Discard the shifted token. */ - yychar = YYEMPTY; - goto yynewstate; - - -/*-----------------------------------------------------------. -| yydefault -- do the default action for the current state. | -`-----------------------------------------------------------*/ -yydefault: - yyn = yydefact[yystate]; - if (yyn == 0) - goto yyerrlab; - goto yyreduce; - - -/*-----------------------------. -| yyreduce -- do a reduction. | -`-----------------------------*/ -yyreduce: - /* yyn is the number of a rule to reduce with. */ - yylen = yyr2[yyn]; - - /* If YYLEN is nonzero, implement the default value of the action: - '$$ = $1'. - - Otherwise, the following line sets YYVAL to garbage. - This behavior is undocumented and Bison - users should not rely upon it. Assigning to YYVAL - unconditionally makes the parser a bit smaller, and it avoids a - GCC warning that YYVAL may be used uninitialized. */ - yyval = yyvsp[1-yylen]; - - - YY_REDUCE_PRINT (yyn); - switch (yyn) - { - case 2: /* rc: %empty */ -#line 38 "sys/cmd/rc/syntax.y" - { return 0; } -#line 1549 "sys/cmd/rc/parse.c" - break; - - case 3: /* rc: line '\n' */ -#line 39 "sys/cmd/rc/syntax.y" - { return compile((yyvsp[-1].tree)); } -#line 1555 "sys/cmd/rc/parse.c" - break; - - case 5: /* line: cmds line */ -#line 43 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(';', (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1561 "sys/cmd/rc/parse.c" - break; - - case 7: /* body: cmdsln body */ -#line 47 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(';', (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1567 "sys/cmd/rc/parse.c" - break; - - case 8: /* paren: '(' body ')' */ -#line 50 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tparen, (yyvsp[-1].tree)); } -#line 1573 "sys/cmd/rc/parse.c" - break; - - case 9: /* block: '{' body '}' */ -#line 53 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tblock, (yyvsp[-1].tree)); } -#line 1579 "sys/cmd/rc/parse.c" - break; - - case 11: /* cmds: cmd '&' */ -#line 57 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1('&', (yyvsp[-1].tree)); } -#line 1585 "sys/cmd/rc/parse.c" - break; - - case 14: /* ifbody: cmd */ -#line 64 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Tif, nil, (yyvsp[0].tree)); } -#line 1591 "sys/cmd/rc/parse.c" - break; - - case 15: /* ifbody: block Telse nl cmd */ -#line 65 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree3(Tif, nil, (yyvsp[-3].tree), (yyvsp[-2].tree)); } -#line 1597 "sys/cmd/rc/parse.c" - break; - - case 16: /* case: Tcase words ';' */ -#line 68 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-2].tree), (yyvsp[-1].tree), 0); } -#line 1603 "sys/cmd/rc/parse.c" - break; - - case 17: /* case: Tcase words '\n' */ -#line 69 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-2].tree), (yyvsp[-1].tree), 0); } -#line 1609 "sys/cmd/rc/parse.c" - break; - - case 18: /* casebody: cmd */ -#line 72 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Tcasebody, (yyvsp[0].tree), nil); } -#line 1615 "sys/cmd/rc/parse.c" - break; - - case 19: /* casebody: case casebody */ -#line 73 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Tcasebody, (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1621 "sys/cmd/rc/parse.c" - break; - - case 20: /* casebody: cmdsln casebody */ -#line 74 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Tcasebody, (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1627 "sys/cmd/rc/parse.c" - break; - - case 21: /* assign: executable '=' word */ -#line 77 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2('=', (yyvsp[-2].tree), (yyvsp[0].tree)); } -#line 1633 "sys/cmd/rc/parse.c" - break; - - case 23: /* redir: Tredir word */ -#line 81 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-1].tree), (yyvsp[0].tree), 0); } -#line 1639 "sys/cmd/rc/parse.c" - break; - - case 24: /* epilog: %empty */ -#line 84 "sys/cmd/rc/syntax.y" - { (yyval.tree) = nil; } -#line 1645 "sys/cmd/rc/parse.c" - break; - - case 25: /* epilog: redir epilog */ -#line 85 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-1].tree), (yyvsp[0].tree), 1); } -#line 1651 "sys/cmd/rc/parse.c" - break; - - case 26: /* cmd: %empty */ -#line 88 "sys/cmd/rc/syntax.y" - { (yyval.tree) = nil; } -#line 1657 "sys/cmd/rc/parse.c" - break; - - case 27: /* cmd: basic */ -#line 89 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tbasic, (yyvsp[0].tree)); } -#line 1663 "sys/cmd/rc/parse.c" - break; - - case 28: /* cmd: block epilog */ -#line 90 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangepilog((yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1669 "sys/cmd/rc/parse.c" - break; - - case 29: /* cmd: cmd Tpipe nl cmd */ -#line 91 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild2((yyvsp[-2].tree), (yyvsp[-3].tree), 0, (yyvsp[0].tree), 1); } -#line 1675 "sys/cmd/rc/parse.c" - break; - - case 30: /* cmd: cmd Tandand nl cmd */ -#line 92 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Tandand, (yyvsp[-3].tree), (yyvsp[0].tree)); } -#line 1681 "sys/cmd/rc/parse.c" - break; - - case 31: /* cmd: cmd Toror nl cmd */ -#line 93 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Toror, (yyvsp[-3].tree), (yyvsp[0].tree)); } -#line 1687 "sys/cmd/rc/parse.c" - break; - - case 32: /* cmd: redir cmd */ -#line 94 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-1].tree), (yyvsp[0].tree), 1); } -#line 1693 "sys/cmd/rc/parse.c" - break; - - case 33: /* cmd: assign cmd */ -#line 95 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-1].tree), (yyvsp[0].tree), 2); } -#line 1699 "sys/cmd/rc/parse.c" - break; - - case 34: /* cmd: Tbang cmd */ -#line 96 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tbang, (yyvsp[0].tree)); } -#line 1705 "sys/cmd/rc/parse.c" - break; - - case 35: /* cmd: Tsubshell cmd */ -#line 97 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tsubshell, (yyvsp[0].tree)); } -#line 1711 "sys/cmd/rc/parse.c" - break; - - case 36: /* cmd: Tfor '(' word ')' nl cmd */ -#line 98 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild3((yyvsp[-5].tree), (yyvsp[-3].tree), nil, (yyvsp[0].tree)); } -#line 1717 "sys/cmd/rc/parse.c" - break; - - case 37: /* cmd: Tfor '(' word Tin words ')' nl cmd */ -#line 99 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild3((yyvsp[-7].tree), (yyvsp[-5].tree), (yyvsp[-3].tree), (yyvsp[0].tree)); } -#line 1723 "sys/cmd/rc/parse.c" - break; - - case 38: /* cmd: Twhile paren nl cmd */ -#line 100 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild2((yyvsp[-3].tree), (yyvsp[-2].tree), 0, (yyvsp[0].tree), 1); } -#line 1729 "sys/cmd/rc/parse.c" - break; - - case 39: /* cmd: Tif paren nl ifbody */ -#line 101 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild1((yyvsp[-2].tree), (yyvsp[-3].tree), 0); } -#line 1735 "sys/cmd/rc/parse.c" - break; - - case 40: /* cmd: Tswitch '(' word ')' nl '{' casebody '}' */ -#line 102 "sys/cmd/rc/syntax.y" - { (yyval.tree) = hangchild2((yyvsp[-7].tree), (yyvsp[-5].tree), 0, (yyvsp[-1].tree), 1); } -#line 1741 "sys/cmd/rc/parse.c" - break; - - case 42: /* basic: basic word */ -#line 106 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Targs, (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1747 "sys/cmd/rc/parse.c" - break; - - case 43: /* basic: basic redir */ -#line 107 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Targs, (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1753 "sys/cmd/rc/parse.c" - break; - - case 45: /* atom: keyword */ -#line 111 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tword, (yyvsp[0].tree)); } -#line 1759 "sys/cmd/rc/parse.c" - break; - - case 47: /* word: word '^' atom */ -#line 115 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2('^', (yyvsp[-2].tree), (yyvsp[0].tree)); } -#line 1765 "sys/cmd/rc/parse.c" - break; - - case 49: /* executable: executable '^' atom */ -#line 119 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2('^', (yyvsp[-2].tree), (yyvsp[0].tree)); } -#line 1771 "sys/cmd/rc/parse.c" - break; - - case 51: /* nonkeyword: '$' atom */ -#line 123 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1('$', (yyvsp[0].tree)); } -#line 1777 "sys/cmd/rc/parse.c" - break; - - case 52: /* nonkeyword: '$' atom Tindex words ')' */ -#line 124 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Tindex, (yyvsp[-3].tree), (yyvsp[-1].tree)); } -#line 1783 "sys/cmd/rc/parse.c" - break; - - case 53: /* nonkeyword: '(' wordsnl ')' */ -#line 125 "sys/cmd/rc/syntax.y" - { (yyval.tree) = (yyvsp[-1].tree); } -#line 1789 "sys/cmd/rc/parse.c" - break; - - case 54: /* nonkeyword: Tcount atom */ -#line 126 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tcount, (yyvsp[0].tree)); } -#line 1795 "sys/cmd/rc/parse.c" - break; - - case 55: /* nonkeyword: Tjoin atom */ -#line 127 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1(Tjoin, (yyvsp[0].tree)); } -#line 1801 "sys/cmd/rc/parse.c" - break; - - case 56: /* nonkeyword: '`' block */ -#line 128 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree1('`', (yyvsp[0].tree)); } -#line 1807 "sys/cmd/rc/parse.c" - break; - - case 67: /* words: %empty */ -#line 135 "sys/cmd/rc/syntax.y" - { (yyval.tree) = nil; } -#line 1813 "sys/cmd/rc/parse.c" - break; - - case 68: /* words: words word */ -#line 136 "sys/cmd/rc/syntax.y" - { (yyval.tree) = maketree2(Twords, (yyvsp[-1].tree), (yyvsp[0].tree)); } -#line 1819 "sys/cmd/rc/parse.c" - break; - - case 69: /* wordsnl: %empty */ -#line 139 "sys/cmd/rc/syntax.y" - { (yyval.tree) = nil; } -#line 1825 "sys/cmd/rc/parse.c" - break; - - case 71: /* wordsnl: wordsnl word */ -#line 141 "sys/cmd/rc/syntax.y" - {(yyval.tree) = (!(yyvsp[-1].tree)) ? ((!(yyvsp[0].tree)) ? nil : (yyvsp[0].tree)) : ((!(yyvsp[0].tree)) ? (yyvsp[-1].tree) : maketree2(Twords, (yyvsp[-1].tree), (yyvsp[0].tree))); } -#line 1831 "sys/cmd/rc/parse.c" - break; - - -#line 1835 "sys/cmd/rc/parse.c" - - default: break; - } - /* User semantic actions sometimes alter yychar, and that requires - that yytoken be updated with the new translation. We take the - approach of translating immediately before every use of yytoken. - One alternative is translating here after every semantic action, - but that translation would be missed if the semantic action invokes - YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or - if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an - incorrect destructor might then be invoked immediately. In the - case of YYERROR or YYBACKUP, subsequent parser actions might lead - to an incorrect destructor call or verbose syntax error message - before the lookahead is translated. */ - YY_SYMBOL_PRINT ("-> $$ =", YY_CAST (yysymbol_kind_t, yyr1[yyn]), &yyval, &yyloc); - - YYPOPSTACK (yylen); - yylen = 0; - - *++yyvsp = yyval; - - /* Now 'shift' the result of the reduction. Determine what state - that goes to, based on the state we popped back to and the rule - number reduced by. */ - { - const int yylhs = yyr1[yyn] - YYNTOKENS; - const int yyi = yypgoto[yylhs] + *yyssp; - yystate = (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyssp - ? yytable[yyi] - : yydefgoto[yylhs]); - } - - goto yynewstate; - - -/*--------------------------------------. -| yyerrlab -- here on detecting error. | -`--------------------------------------*/ -yyerrlab: - /* Make sure we have latest lookahead translation. See comments at - user semantic actions for why this is necessary. */ - yytoken = yychar == YYEMPTY ? YYSYMBOL_YYEMPTY : YYTRANSLATE (yychar); - /* If not already recovering from an error, report this error. */ - if (!yyerrstatus) - { - ++yynerrs; - { - yypcontext_t yyctx - = {yyssp, yytoken}; - char const *yymsgp = YY_("syntax error"); - int yysyntax_error_status; - yysyntax_error_status = yysyntax_error (&yymsg_alloc, &yymsg, &yyctx); - if (yysyntax_error_status == 0) - yymsgp = yymsg; - else if (yysyntax_error_status == -1) - { - if (yymsg != yymsgbuf) - YYSTACK_FREE (yymsg); - yymsg = YY_CAST (char *, - YYSTACK_ALLOC (YY_CAST (YYSIZE_T, yymsg_alloc))); - if (yymsg) - { - yysyntax_error_status - = yysyntax_error (&yymsg_alloc, &yymsg, &yyctx); - yymsgp = yymsg; - } - else - { - yymsg = yymsgbuf; - yymsg_alloc = sizeof yymsgbuf; - yysyntax_error_status = YYENOMEM; - } - } - yyerror (yymsgp); - if (yysyntax_error_status == YYENOMEM) - YYNOMEM; - } - } - - if (yyerrstatus == 3) - { - /* If just tried and failed to reuse lookahead token after an - error, discard it. */ - - if (yychar <= YYEOF) - { - /* Return failure if at end of input. */ - if (yychar == YYEOF) - YYABORT; - } - else - { - yydestruct ("Error: discarding", - yytoken, &yylval); - yychar = YYEMPTY; - } - } - - /* Else will try to reuse lookahead token after shifting the error - token. */ - goto yyerrlab1; - - -/*---------------------------------------------------. -| yyerrorlab -- error raised explicitly by YYERROR. | -`---------------------------------------------------*/ -yyerrorlab: - /* Pacify compilers when the user code never invokes YYERROR and the - label yyerrorlab therefore never appears in user code. */ - if (0) - YYERROR; - ++yynerrs; - - /* Do not reclaim the symbols of the rule whose action triggered - this YYERROR. */ - YYPOPSTACK (yylen); - yylen = 0; - YY_STACK_PRINT (yyss, yyssp); - yystate = *yyssp; - goto yyerrlab1; - - -/*-------------------------------------------------------------. -| yyerrlab1 -- common code for both syntax error and YYERROR. | -`-------------------------------------------------------------*/ -yyerrlab1: - yyerrstatus = 3; /* Each real token shifted decrements this. */ - - /* Pop stack until we find a state that shifts the error token. */ - for (;;) - { - yyn = yypact[yystate]; - if (!yypact_value_is_default (yyn)) - { - yyn += YYSYMBOL_YYerror; - if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYSYMBOL_YYerror) - { - yyn = yytable[yyn]; - if (0 < yyn) - break; - } - } - - /* Pop the current state because it cannot handle the error token. */ - if (yyssp == yyss) - YYABORT; - - - yydestruct ("Error: popping", - YY_ACCESSING_SYMBOL (yystate), yyvsp); - YYPOPSTACK (1); - yystate = *yyssp; - YY_STACK_PRINT (yyss, yyssp); - } - - YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN - *++yyvsp = yylval; - YY_IGNORE_MAYBE_UNINITIALIZED_END - - - /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", YY_ACCESSING_SYMBOL (yyn), yyvsp, yylsp); - - yystate = yyn; - goto yynewstate; - - -/*-------------------------------------. -| yyacceptlab -- YYACCEPT comes here. | -`-------------------------------------*/ -yyacceptlab: - yyresult = 0; - goto yyreturnlab; - - -/*-----------------------------------. -| yyabortlab -- YYABORT comes here. | -`-----------------------------------*/ -yyabortlab: - yyresult = 1; - goto yyreturnlab; - - -/*-----------------------------------------------------------. -| yyexhaustedlab -- YYNOMEM (memory exhaustion) comes here. | -`-----------------------------------------------------------*/ -yyexhaustedlab: - yyerror (YY_("memory exhausted")); - yyresult = 2; - goto yyreturnlab; - - -/*----------------------------------------------------------. -| yyreturnlab -- parsing is finished, clean up and return. | -`----------------------------------------------------------*/ -yyreturnlab: - if (yychar != YYEMPTY) - { - /* Make sure we have latest lookahead translation. See comments at - user semantic actions for why this is necessary. */ - yytoken = YYTRANSLATE (yychar); - yydestruct ("Cleanup: discarding lookahead", - yytoken, &yylval); - } - /* Do not reclaim the symbols of the rule whose action triggered - this YYABORT or YYACCEPT. */ - YYPOPSTACK (yylen); - YY_STACK_PRINT (yyss, yyssp); - while (yyssp != yyss) - { - yydestruct ("Cleanup: popping", - YY_ACCESSING_SYMBOL (+*yyssp), yyvsp); - YYPOPSTACK (1); - } -#ifndef yyoverflow - if (yyss != yyssa) - YYSTACK_FREE (yyss); -#endif - if (yymsg != yymsgbuf) - YYSTACK_FREE (yymsg); - return yyresult; -} - -#line 147 "sys/cmd/rc/syntax.y" - diff --git a/sys/cmd/rc/parse.h b/sys/cmd/rc/parse.h deleted file mode 100644 index 64ee07b..0000000 --- a/sys/cmd/rc/parse.h +++ /dev/null @@ -1,141 +0,0 @@ -/* A Bison parser, made by GNU Bison 3.8.2. */ - -/* Bison interface for Yacc-like parsers in C - - Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2021 Free Software Foundation, - Inc. - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . */ - -/* As a special exception, you may create a larger work that contains - part or all of the Bison parser skeleton and distribute that work - under terms of your choice, so long as that work isn't itself a - parser generator using the skeleton or a modified version thereof - as a parser skeleton. Alternatively, if you modify or redistribute - the parser skeleton itself, you may (at your option) remove this - special exception, which will cause the skeleton and the resulting - Bison output files to be licensed under the GNU General Public - License without this special exception. - - This special exception was added by the Free Software Foundation in - version 2.2 of Bison. */ - -/* DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual, - especially those whose name start with YY_ or yy_. They are - private implementation details that can be changed or removed. */ - -#ifndef YY_YY_SYS_CMD_RC_PARSE_H_INCLUDED -# define YY_YY_SYS_CMD_RC_PARSE_H_INCLUDED -/* Debug traces. */ -#ifndef YYDEBUG -# define YYDEBUG 0 -#endif -#if YYDEBUG -extern int yydebug; -#endif - -/* Token kinds. */ -#ifndef YYTOKENTYPE -# define YYTOKENTYPE - enum yytokentype - { - YYEMPTY = -2, - YYEOF = 0, /* "end of file" */ - YYerror = 256, /* error */ - YYUNDEF = 257, /* "invalid token" */ - Tfor = 258, /* Tfor */ - Tin = 259, /* Tin */ - Twhile = 260, /* Twhile */ - Tif = 261, /* Tif */ - Telse = 262, /* Telse */ - Tswitch = 263, /* Tswitch */ - Tcase = 264, /* Tcase */ - Tcasebody = 265, /* Tcasebody */ - Ttwiddle = 266, /* Ttwiddle */ - Tbang = 267, /* Tbang */ - Tsubshell = 268, /* Tsubshell */ - Tfunc = 269, /* Tfunc */ - Tredir = 270, /* Tredir */ - Tdup = 271, /* Tdup */ - Tpipe = 272, /* Tpipe */ - Tindex = 273, /* Tindex */ - Tbasic = 274, /* Tbasic */ - Targs = 275, /* Targs */ - Tword = 276, /* Tword */ - Twords = 277, /* Twords */ - Tparen = 278, /* Tparen */ - Tblock = 279, /* Tblock */ - Tandand = 280, /* Tandand */ - Toror = 281, /* Toror */ - Tcount = 282, /* Tcount */ - Tjoin = 283 /* Tjoin */ - }; - typedef enum yytokentype yytoken_kind_t; -#endif -/* Token kinds. */ -#define YYEMPTY -2 -#define YYEOF 0 -#define YYerror 256 -#define YYUNDEF 257 -#define Tfor 258 -#define Tin 259 -#define Twhile 260 -#define Tif 261 -#define Telse 262 -#define Tswitch 263 -#define Tcase 264 -#define Tcasebody 265 -#define Ttwiddle 266 -#define Tbang 267 -#define Tsubshell 268 -#define Tfunc 269 -#define Tredir 270 -#define Tdup 271 -#define Tpipe 272 -#define Tindex 273 -#define Tbasic 274 -#define Targs 275 -#define Tword 276 -#define Twords 277 -#define Tparen 278 -#define Tblock 279 -#define Tandand 280 -#define Toror 281 -#define Tcount 282 -#define Tjoin 283 - -/* Value type. */ -#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED -union YYSTYPE -{ -#line 24 "sys/cmd/rc/syntax.y" - - struct Tree *tree; - -#line 127 "sys/cmd/rc/parse.h" - -}; -typedef union YYSTYPE YYSTYPE; -# define YYSTYPE_IS_TRIVIAL 1 -# define YYSTYPE_IS_DECLARED 1 -#endif - - -extern YYSTYPE yylval; - - -int yyparse (void); - - -#endif /* !YY_YY_SYS_CMD_RC_PARSE_H_INCLUDED */ diff --git a/sys/cmd/rc/prompt.c b/sys/cmd/rc/prompt.c deleted file mode 100644 index 1122d54..0000000 --- a/sys/cmd/rc/prompt.c +++ /dev/null @@ -1,36 +0,0 @@ -#include "rc.h" - -/* static char promptbuf[7] = {'>', ' ', 0, ' ' , ' ', ' ', 0}; */ -static char *base= "\x1b[1;31m" ">" "\x1b[0;0m" " ", *promptstr; - -void -resetprompt(void) -{ - promptstr = base; -} - -int -prompt(ushort *flag) -{ - int f = *flag; - - if(f){ - if(!readline(promptstr)){ - runner->flag.eof = 1; - return 0; - } - if(runner->cmd.io->e[-1] == '\n'){ - runner->cmd.io->e[-1] = 0; - addhistory(runner->cmd.io->b); - runner->cmd.io->e[-1] = '\n'; - } - - write(mapfd(0), "\n\r", 2); - promptstr = " "; - - runner->line++; - *flag = 0; - } - - return 1; -} diff --git a/sys/cmd/rc/rc.h b/sys/cmd/rc/rc.h deleted file mode 100644 index 9b415fc..0000000 --- a/sys/cmd/rc/rc.h +++ /dev/null @@ -1,263 +0,0 @@ - -#include -#include -#include - -// ----------------------------------------------------------------------- -// types - -typedef struct Io Io; -typedef struct Var Var; -typedef struct Word Word; -typedef struct List List; -typedef struct Tree Tree; -typedef struct Redir Redir; -typedef union Code Code; -typedef struct Thread Thread; -typedef struct Shell Shell; - -struct Io -{ - int fd, cap; - char *s; - char *b, *e, buf[]; -}; - -enum -{ - Rappend, - Rwrite, - Rread, - Rhere, - Rdupfd, - Ropen, - Rclose, - Rrdwr -}; - -struct Tree -{ - int type; - union{ - struct { - ushort quoted; - char *str; // Tword - }; - struct { - ushort type; // Tpipe, Tredir, Tdup - int fd[2]; - } redir; - }; - Tree *child[3]; - Tree *link; -}; - -struct Word -{ - char *str; - Word *link; -}; - -struct List -{ - Word *word; - List *link; -}; - -/* - * the first word of any code vector is a reference count - * always create a new reference to a code vector by calling copycode() - * always call freecode() when deleting a reference - */ -union Code -{ - int i; - void (*f)(void); - char *s; -}; - -struct Var -{ - char *name; - Word *val; - short new : 1; - short newfunc : 1; - Code *func; - void (*update)(Var *); - Var *link; -}; - -struct Redir -{ - char type; /* what to do */ - short from, to; /* what to do it to */ - struct Redir *link; /* what else to do (reverse order) */ -}; - -enum -{ - Pnil, - Prun, - Pstop, - Psig, - Pagain, - Pdone, -}; - -struct WaitItem -{ - int pid; - ushort status; -}; - -struct Thread -{ - struct { - int i; - Code *exe; - } code; // execution stack - struct { - Io *io; - char *path; - } cmd; // command input - - List *args; // argument stack - Var *local; // local variables - struct { - Redir *start; - Redir *end; - } redir; // list of redirections - - struct { - ushort user : 1; - ushort eof : 1; - } flag; - - struct { - ushort status; - int len, cap; - struct WaitItem *on; - } wait; - - int pid, pgid, status; - long line; - - Thread *caller; // process we return to - Thread *link; // next job -}; - -struct Shell -{ - int pid; - Io *err; - int status; - int interactive; - Thread *jobs; -}; - -// ----------------------------------------------------------------------- -// globals - -extern Shell shell; -extern Thread *runner; -extern Code *compiled; - -// ----------------------------------------------------------------------- -// functions - -/* util.c */ -void itoa(char*, long i); -void fatal(char *, ...); -void *emalloc(uintptr); -void *erealloc(void*, uintptr); -void efree(void*); - -/* input.c */ -int readline(char *); -void enablevi(void); - -void inithistory(void); -int addhistory(char *); - -/* prompt.c */ -void resetprompt(void); -int prompt(ushort *); - -/* io.c */ -Io *openfd(int fd); -Io *openstr(void); -void terminate(Io *io); - -int get(Io *); -int put(Io **, char); - -void flush(Io *io); -void print(Io *, char *, ...); - -/* lex.c */ -int iswordchar(int c); -int yylex(void); - -/* tree.c */ -Tree *maketree(void); -Tree *maketree1(int, Tree*); -Tree *maketree2(int, Tree*, Tree*); -Tree *maketree3(int, Tree*, Tree*, Tree*); - -Tree *token(int, char *); -Tree *hangchild1(Tree *, Tree *, int); -Tree *hangchild2(Tree *, Tree *, int, Tree *, int); -Tree *hangchild3(Tree *, Tree *, Tree *, Tree *); -Tree *hangepilog(Tree *, Tree*); - -void freeparsetree(void); - -/* sys.c */ -void initenv(void); -void redirect(struct Redir *); -void execute(Word *, Word*); -int mapfd(int fd); - -/* wait.c */ -void addwait(Thread *, int); -void delwait(Thread *, int); -void clearwait(Thread*); - -int waitall(Thread *); -int waitfor(Thread *, int); - -void killzombies(void); - -/* job.c */ -Thread *getjob(int, int*); -void addjob(Thread *); -void deljob(Thread *); -void wakeup(Thread *); -void report(Thread *, int); - -void foreground(Thread *, int); -void background(Thread *, int); - -/* exec.c */ -// XXX: odd place for this -int count(Word *); -Word *makeword(char *str, Word *link); -void freeword(Word *w); - -/* var.c */ -Var *var(char*); -Var *definevar(char*, Var *); -Var *globalvar(char*); -Var *makevar(char *name, Var *link); -void setvar(char *, Word *); -int iskeyword(char *); - -void initpath(void); -void initkeywords(void); - -char **mkenv(void); - -/* code.c */ -int compile(Tree *); -Code *copycode(Code *c); -void freecode(Code *c); diff --git a/sys/cmd/rc/rules.mk b/sys/cmd/rc/rules.mk deleted file mode 100644 index a2fd058..0000000 --- a/sys/cmd/rc/rules.mk +++ /dev/null @@ -1,31 +0,0 @@ -include share/push.mk -# Iterate through subdirectory tree - -# Local sources -SRCS_$(d) :=\ - $(d)/util.c\ - $(d)/input.c\ - $(d)/prompt.c\ - $(d)/io.c\ - $(d)/lex.c\ - $(d)/parse.c\ - $(d)/tree.c\ - $(d)/code.c\ - $(d)/var.c\ - $(d)/sys.c\ - $(d)/wait.c\ - $(d)/job.c\ - $(d)/exec.c\ - $(d)/main.c - -BINS_$(d) := $(d)/rc - -include share/paths.mk -$(d)/parse.h $(d)/parse.c: $(d)/syntax.y - yacc --header=$( line cmds cmdsln body paren block ifbody casebody case assign epilog redir; -%type cmd basic executable nonkeyword keyword word words wordsnl atom; -%type Tfor Tin Twhile Tif Telse Tswitch Tcase Ttwiddle Tbang Tsubshell Tfunc; -%type Tword Tredir Tpipe Tdup; - -/* grammar */ - -%start rc - -%% -rc: -/*empty*/ { return 0; } -| line '\n' { return compile($1); } - -line: - cmd -| cmds line { $$ = maketree2(';', $1, $2); } - -body: - cmd -| cmdsln body { $$ = maketree2(';', $1, $2); } - -paren: - '(' body ')' { $$ = maketree1(Tparen, $2); } - -block: - '{' body '}' { $$ = maketree1(Tblock, $2); } - -cmds: - cmd ';' -| cmd '&' { $$ = maketree1('&', $1); } - -cmdsln: - cmds -| cmd '\n' - -ifbody: - cmd %prec Telse { $$ = maketree2(Tif, nil, $1); } -| block Telse nl cmd { $$ = maketree3(Tif, nil, $1, $2); } - -case: - Tcase words ';' { $$ = hangchild1($1, $2, 0); } -| Tcase words '\n' { $$ = hangchild1($1, $2, 0); } - -casebody: - cmd { $$ = maketree2(Tcasebody, $1, nil); } -| case casebody { $$ = maketree2(Tcasebody, $1, $2); } -| cmdsln casebody { $$ = maketree2(Tcasebody, $1, $2); } - -assign: - executable '=' word { $$ = maketree2('=', $1, $3); } - -redir: - Tdup -| Tredir word { $$ = hangchild1($1, $2, 0); } - -epilog: -/* empty */ { $$ = nil; } -| redir epilog { $$ = hangchild1($1, $2, 1); } - -cmd: -/* empty */ %prec Twhile { $$ = nil; } -| basic { $$ = maketree1(Tbasic, $1); } -| block epilog { $$ = hangepilog($1, $2); } -| cmd Tpipe nl cmd { $$ = hangchild2($2, $1, 0, $4, 1); } -| cmd Tandand nl cmd { $$ = maketree2(Tandand, $1, $4); } -| cmd Toror nl cmd { $$ = maketree2(Toror, $1, $4); } -| redir cmd %prec Tbang { $$ = hangchild1($1, $2, 1); } -| assign cmd %prec Tbang { $$ = hangchild1($1, $2, 2); } -| Tbang cmd { $$ = maketree1(Tbang, $2); } -| Tsubshell cmd { $$ = maketree1(Tsubshell, $2); } -| Tfor '(' word ')' nl cmd { $$ = hangchild3($1, $3, nil, $6); } -| Tfor '(' word Tin words ')' nl cmd { $$ = hangchild3($1, $3, $5, $8); } -| Twhile paren nl cmd { $$ = hangchild2($1, $2, 0, $4, 1); } -| Tif paren nl ifbody { $$ = hangchild1($2, $1, 0); } -| Tswitch '(' word ')' nl '{' casebody '}' { $$ = hangchild2($1, $3, 0, $7, 1); } - -basic: - executable -| basic word { $$ = maketree2(Targs, $1, $2); } -| basic redir { $$ = maketree2(Targs, $1, $2); } - -atom: - nonkeyword -| keyword { $$ = maketree1(Tword, $1); } - -word: - atom -| word '^' atom { $$ = maketree2('^', $1, $3); } - -executable: - nonkeyword -| executable '^' atom { $$ = maketree2('^', $1, $3); } - -nonkeyword: - Tword -| '$' atom { $$ = maketree1('$', $2); } -| '$' atom Tindex words ')' { $$ = maketree2(Tindex, $2, $4); } -| '(' wordsnl ')' { $$ = $2; } -| Tcount atom { $$ = maketree1(Tcount, $2); } -| Tjoin atom { $$ = maketree1(Tjoin, $2); } -| '`' block { $$ = maketree1('`', $2); } -//| Tredir block { $$ = hangchild1($1, $2, 0); $$->type = Tpipefd; } - -keyword: - Tfor|Tin|Twhile|Tif|Telse|Tswitch|Tcase|Tbang|Tsubshell|Tfunc - -words: -/* empty */ { $$ = nil; } -| words word { $$ = maketree2(Twords, $1, $2); } - -wordsnl: -/* empty */ { $$ = nil; } -| wordsnl '\n' /* empty */ -| wordsnl word {$$ = (!$1) ? ((!$2) ? nil : $2) : ((!$2) ? $1 : maketree2(Twords, $1, $2)); } - -nl: -/*empty*/ -| nl '\n' - -%% diff --git a/sys/cmd/rc/sys.c b/sys/cmd/rc/sys.c deleted file mode 100644 index 807359d..0000000 --- a/sys/cmd/rc/sys.c +++ /dev/null @@ -1,137 +0,0 @@ -#include "rc.h" - -// ----------------------------------------------------------------------- -// internal - -static -char** -mkargv(Word *args) -{ - char **argv=emalloc((count(args)+2)*sizeof(char *)); - char **argp=argv+1; /* leave one at front for runcoms */ - - for(;args;args=args->link) - *argp++=args->str; - *argp=nil; - - return argv; -} - -static -Word* -envval(char *s) -{ - Word *v; - char *t, c; - - for(t=s; *t && *t!='\1'; t++) - ; - - c = *t; - *t = '\0'; - - v = makeword(s, (c=='\0') ? nil : envval(t+1)); - *t=c; - - return v; -} - -// ----------------------------------------------------------------------- -// exported - -void -initenv(void) -{ - extern char **environ; - - char *s; - char **env; - - for(env=environ; *env; env++) { - for(s=*env; *s && *s != '(' && *s != '='; s++) - ; - switch(*s){ - case '\0': - break; - case '(': /* ignore functions */ - break; - case '=': - *s = '\0'; - setvar(*env, envval(s+1)); - *s = '='; - break; - } - } -} - -void -execute(Word *cmd, Word *path) -{ - int nc; - char **argv = mkargv(cmd); - char **env = mkenv(); - char file[1024]; - - for(; path; path=path->link){ - nc = strlen(path->str); - if(nc < arrlen(file)){ - strcpy(file, path->str); - if(file[0]){ - strcat(file, "/"); - nc++; - } - if(nc+strlen(argv[1]) < arrlen(file)){ - strcat(file, argv[1]); - execve(file, argv+1, env); - }else - fatal("command name too long"); - } - } - print(shell.err, "could not execute command: %s\n", argv[1]); - efree(argv); -} - -void -redirect(Redir *r) -{ - if(r){ - redirect(r->link); - switch(r->type){ - case Ropen: - if(r->from != r->to){ - dup2(r->from, r->to); - close(r->from); - } - break; - case Rdupfd: - dup2(r->from, r->to); // TODO: error checking - break; - case Rclose: - close(r->from); - break; - default: - fatal("unrecognized redirection type %d\n", r->type); - } - } -} - -int -mapfd(int fd) -{ - Redir *r; - for(r = runner->redir.end; r; r = r->link){ - switch(r->type){ - case Rclose: - if(r->from == fd) - fd = -1; - break; - case Rdupfd: - case Ropen: - if(r->to == fd) - fd = r->from; - break; - } - } - - return fd; -} diff --git a/sys/cmd/rc/tree.c b/sys/cmd/rc/tree.c deleted file mode 100644 index 2c65041..0000000 --- a/sys/cmd/rc/tree.c +++ /dev/null @@ -1,111 +0,0 @@ -#include "rc.h" -#include "parse.h" - -static Tree *nodes; - -Tree* -maketree(void) -{ - Tree *node = emalloc(sizeof(*node)); - - node->link = nodes; - nodes = node; - return node; -} - -void -freeparsetree(void) -{ - Tree *t, *nt; - for(t = nodes; t; t = nt) { - nt = t->link; - if(t->type == Tword && t->str) - efree(t->str); - efree(t); - } - nodes = nil; -} - -Tree* -maketree1(int type, Tree *c0) -{ - return maketree2(type, c0, nil); -} - -Tree* -maketree2(int type, Tree *c0, Tree *c1) -{ - return maketree3(type, c0, c1, nil); -} - -Tree* -maketree3(int type, Tree *c0, Tree *c1, Tree *c2) -{ - Tree *node = maketree(); - - node->type = type; - node->child[0] = c0; - node->child[1] = c1; - node->child[2] = c2; - - return node; -} - -Tree* -hangchild1(Tree *node, Tree *c, int i) -{ - node->child[i] = c; - - return node; -} - -Tree* -hangchild2(Tree *node, Tree *c1, int i1, Tree *c2, int i2) -{ - node->child[i1] = c1; - node->child[i2] = c2; - - return node; -} - -Tree* -hangchild3(Tree *node, Tree *c0, Tree *c1, Tree *c2) -{ - node->child[0] = c0; - node->child[1] = c1; - node->child[2] = c2; - - return node; -} - -Tree* -hangepilog(Tree *cmd, Tree *epi) -{ - Tree *p; - if(!epi) - return cmd; - for(p = epi; p->child[1]; p = p->child[1]) - ; - - p->child[1] = cmd; - return epi; -} - -Tree* -token(int type, char *s) -{ - Tree *node = maketree(); - - node->type = type; - node->str = strdup(s); - - return node; -} - -/* -Tree* -basic(Tree *node) -{ - return maketree1(Tbasic, node); -} -*/ diff --git a/sys/cmd/rc/util.c b/sys/cmd/rc/util.c deleted file mode 100644 index b0be788..0000000 --- a/sys/cmd/rc/util.c +++ /dev/null @@ -1,65 +0,0 @@ -#include "rc.h" - -void -fatal(char *msg, ...) -{ - va_list args; - vfprintf(stderr, msg, args); - va_end(args); - - abort(); -} - -void* -emalloc(uintptr n) -{ - void *p; - if(!(p = malloc(n))) - fatal("out of memory: can't allocate %d bytes", n); - - memset(p, 0, n); - return p; -} - -void* -erealloc(void *p, uintptr n) -{ - void *r; - if(!(r = realloc(p,n))) - fatal("out of memory: can't reallocate %d bytes", n); - - return r; -} - -void -efree(void *p) -{ - if(p) - free(p); - // TODO: log the double free -} - - -char *bp; - -static -void -iacvt(int n) -{ - if(n<0){ - *bp++='-'; - n=-n; /* doesn't work for n==-inf */ - } - if(n/10) - iacvt(n/10); - - *bp++=n%10+'0'; -} - -void -itoa(char *s, long n) -{ - bp = s; - iacvt(n); - *bp='\0'; -} diff --git a/sys/cmd/rc/var.c b/sys/cmd/rc/var.c deleted file mode 100644 index 3e9635f..0000000 --- a/sys/cmd/rc/var.c +++ /dev/null @@ -1,336 +0,0 @@ -#include "rc.h" -#include "parse.h" - -// TODO: string interning - -// ----------------------------------------------------------------------- -// globals - -struct Keyword -{ - char *name; - int type; -}; - -static Var *globals[512]; -static struct Keyword keywords[100]; // sparse map means less hits - -// ----------------------------------------------------------------------- -// internals - -static -int -hash(char *s, int len) -{ - int h =0, i = 1; - while(*s) - h += *s++*i++; - - h %= len; - return h < 0 ? h+len : h; -} - -static -void -·setvar(char *name, Word *val, int call) -{ - Var *v = var(name); - freeword(v->val); - - v->val = val; - v->new = 1; // this never turns off? - - if(call && v->update) - v->update(v); -} - -static -char* -list2strcolon(Word *words) -{ - char *value, *s, *t; - int len = 0; - Word *ap; - for(ap = words;ap;ap = ap->link) - len+=1+strlen(ap->str); - - value = emalloc(len+1); - - s = value; - for(ap = words; ap; ap = ap->link){ - for(t = ap->str;*t;) *s++=*t++; - *s++=':'; - } - - if(s==value) - *s='\0'; - else - s[-1]='\0'; - - return value; -} - -static -void -littlepath(Var *v) -{ - /* convert $path to $PATH */ - char *p; - Word *w; - - p = list2strcolon(v->val); - w = emalloc(sizeof(*w)); - w->str = p; - w->link = nil; - - ·setvar("PATH", w, 1); -} - -static -void -bigpath(Var *v) -{ - /* convert $PATH to $path */ - char *p, *q; - Word **l, *w; - - if(v->val == nil){ - ·setvar("path", nil, 0); - return; - } - - p = v->val->str; - w = nil; - l = &w; - - /* Doesn't handle escaped colon nonsense. */ - if(p[0] == 0) - p = nil; - - while(p){ - q = strchr(p, ':'); - if(q) - *q = 0; - - *l = makeword(p[0] ? p : ".", nil); - l = &(*l)->link; - - if(q){ - *q = ':'; - p = q+1; - }else - p = nil; - } - ·setvar("path", w, 0); -} - -// ----------------------------------------------------------------------- -// exports - -Var* -makevar(char *name, Var *link) -{ - Var *v = emalloc(sizeof(*v)); - - v->name = name; - v->val = 0; - v->new = 0; - v->newfunc = 0; - v->link = link; - v->func = nil; - v->update = nil; - - return v; -} - -void -setvar(char *name, Word *val) -{ - ·setvar(name, val, 1); -} - -Var* -definevar(char *name, Var *link) -{ - Var *v = emalloc(sizeof(*v)); - - v->name = name; - v->val = 0; - v->link = link; - - return v; -} - -Var* -globalvar(char *name) -{ - int h; - Var *v; - - h = hash(name, arrlen(globals)); - - if(strcmp(name,"PATH")==0){ - flush(shell.err); - } - - for(v = globals[h]; v; v = v->link){ - if(strcmp(v->name, name) == 0){ - return v; - } - } - - return globals[h] = definevar(strdup(name), globals[h]); -} - -Var* -var(char *name) -{ - Var *v; - if(runner){ - for(v = runner->local; v; v=v->link) - if(strcmp(v->name, name) == 0) - return v; - } - return globalvar(name); -} - -static -int -cmpenv(const void *a, const void *b) -{ - return strcmp(*(char**)a, *(char**)b); -} - -char** -mkenv(void) -{ - char **env, **ep, *p, *q; - Var **h, *v; - Word *a; - int nvar=0, nchr=0, sep; - -#define BODY \ - if((v==var(v->name)) && v->val){ \ - nvar++; \ - nchr+=strlen(v->name)+1; \ - for(a=v->val;a;a=a->link) \ - nchr+=strlen(a->str)+1; \ - } - - for(v= runner->local; v; v=v->link){ - BODY - } - for(h=globals; h!=arrend(globals); h++){ - for(v = *h; v; v=v->link){ - BODY - } - } - -#undef BODY - - env=emalloc((nvar+1)*sizeof(*env)+nchr); - ep=env; - p=(char *)&env[nvar+1]; - -#define BODY \ - if((v==var(v->name)) && v->val){ \ - *ep++=p; \ - q=v->name; \ - while(*q) \ - *p++=*q++; \ - sep='='; \ - for(a=v->val;a;a=a->link){ \ - *p++=sep; \ - sep='\1'; \ - q=a->str; \ - while(*q) \ - *p++=*q++; \ - } \ - *p++='\0'; \ - } - - for(v=runner->local; v; v=v->link){ - BODY - } - for(h=globals; h!=arrend(globals); h++){ - for(v = *h; v; v=v->link){ - BODY - } - } -#undef BODY - - *ep=0; - - qsort((char *)env, nvar, sizeof ep[0], cmpenv); - return env; -} - -void -initpath(void) -{ - Var *v; - - v = globalvar("path"); - v->update = littlepath; - - v = globalvar("PATH"); - v->update = bigpath; - - flush(shell.err); - bigpath(v); -} - -#define KEYWORDS \ - KEYWORD("for", Tfor) \ - KEYWORD("in", Tin) \ - KEYWORD("while", Twhile) \ - KEYWORD("if", Tif) \ - KEYWORD("else", Telse) \ - KEYWORD("switch", Tswitch) \ - KEYWORD("case", Tcase) \ - KEYWORD("!", Tbang) \ - KEYWORD("@", Tsubshell) \ - KEYWORD("func", Tfunc) - -void -initkeywords(void) -{ - int i, s, j, h; -#define KEYWORD(a, b) a, - static char *name[] = { KEYWORDS }; -#undef KEYWORD -#define KEYWORD(a, b) b, - static int type[] = { KEYWORDS }; -#undef KEYWORD - - for(i = 0; i < arrlen(type); i++){ - h = hash(name[i], arrlen(keywords)); - for(s=0; s < arrlen(keywords); s++){ - j = (h + s) % arrlen(keywords); - if(!keywords[j].type || strcmp(keywords[j].name, name[i]) == 0){ - keywords[j].name = name[i]; - keywords[j].type = type[i]; - goto nextkeyword; - } - } - nextkeyword:; - } -} - -int -iskeyword(char *word) -{ - int i, s, h; - - h = hash(word, arrlen(keywords)); - for(s = 0; s < arrlen(keywords); s++){ - i = (h + s) % arrlen(keywords); - if(!keywords[i].type) - return 0; - if(strcmp(keywords[i].name, word) == 0) - return keywords[i].type; - } - return 0; -} - -#undef KEYWORDS diff --git a/sys/cmd/rc/wait.c b/sys/cmd/rc/wait.c deleted file mode 100644 index 911601c..0000000 --- a/sys/cmd/rc/wait.c +++ /dev/null @@ -1,247 +0,0 @@ -#include "rc.h" - -#include - -// ----------------------------------------------------------------------- -// globals - -struct WaitMsg -{ - int pid; - int type; - ulong time[3]; - int status; -}; - -// ----------------------------------------------------------------------- -// internal - -static -int -await(int pid4, int opt, struct WaitMsg *msg) -{ - int pid, status, core; - struct rusage ru; - ulong u, s; - - /* event loop */ - for(;;){ - if((pid = wait4(pid4, &status, opt, &ru)) <= 0){ - if(errno == ECHILD){ - msg->pid = -1; - return 1; - } - msg->pid = 0; - perror("failed wait4"); - return 0; - } - - u = ru.ru_utime.tv_sec*1000+((ru.ru_utime.tv_usec+500)/1000); - s = ru.ru_stime.tv_sec*1000+((ru.ru_stime.tv_usec+500)/1000); - - if(WIFEXITED(status)){ - msg->pid = pid; - msg->time[0] = u; - msg->time[1] = s; - msg->time[2] = u+s; - msg->status = WEXITSTATUS(status); - msg->type = Pdone; - - return 1; - } - - if(WIFSIGNALED(status)){ - msg->pid = pid; - msg->time[0] = u; - msg->time[1] = s; - msg->time[2] = u+s; - msg->status = WTERMSIG(status); - msg->type = Psig; - - return 1; - } - - if(WIFSTOPPED(status)){ - msg->pid = pid; - msg->time[0] = u; - msg->time[1] = s; - msg->time[2] = u+s; - msg->status = WSTOPSIG(status); - msg->type = Pstop; - - return 1; - } - } -} - -static -int -shouldwait(Thread *job) -{ - int i; - - for(i=0; iwait.len; i++){ - if(job->wait.on[i].status == Prun) - return 1; - } - - return 0; -} - -static inline -void -notify(Thread *job, struct WaitMsg msg) -{ - int i; - for(i=0; i < job->wait.len; i++){ - if(job->wait.on[i].pid == msg.pid){ - job->status = msg.status; - switch(msg.type){ - case Pstop: - print(shell.err, "%d: suspended\n", msg.pid); - job->wait.status = Pstop; - job->wait.on[i].status = Pstop; - break; - - case Psig: - print(shell.err, "%d: terminated by signal %d\n", msg.pid, msg.status); - /* fallthrough */ - case Pdone: - job->wait.on[i].status = Pdone; - delwait(job, msg.pid); - if(!job->wait.len) - job->wait.status = Pdone; - break; - - default: - fatal("%d: unrecognized message type %d\n", msg.pid, msg.type); - } - break; - } - } -} - -// ----------------------------------------------------------------------- -// exported - -void -clearwait(Thread *job) -{ - job->wait.len = 0; -} - -int -havewait(Thread *job, int pid) -{ - int i; - - for(i=0; iwait.len; i++) - if(job->wait.on[i].pid == pid) - return 1; - return 0; -} - -void -addwait(Thread *job, int pid) -{ - if(job->wait.len == job->wait.cap){ - job->wait.cap = job->wait.cap + 2; - job->wait.on = erealloc(job->wait.on, job->wait.cap*sizeof(*job->wait.on)); - } - - job->wait.on[job->wait.len++] = (struct WaitItem){.pid=pid, .status=Prun}; -} - -void -delwait(Thread *job, int pid) -{ - int r, w; - - for(r=w=0; r < job->wait.len; r++){ - if(job->wait.on[r].pid != pid) - job->wait.on[w++].pid = job->wait.on[r].pid; - } - job->wait.len = w; -} - -int -waitall(Thread *job) -{ - int i; - Thread *t; - struct WaitMsg msg; - - while(shouldwait(job) && await(-job->pgid, WUNTRACED, &msg)){ - switch(msg.pid){ - case 0: // error - perror("wait job"); - return 0; - case -1: // no children: assume they have exited - job->wait.status = Pdone; - clearwait(job); - return 1; - default: - ; - } - - notify(job, msg); - } - return 1; -} - -int -waitfor(Thread *job, int pid) -{ - int i; - Thread *t; - struct WaitMsg msg; - - while(shouldwait(job) && await(-job->pgid, WUNTRACED, &msg)){ - switch(msg.pid){ - case 0: // error - perror("wait for"); - return 0; - case -1: // no children: assume they have exited - job->wait.status = Pdone; - clearwait(job); - return 1; - default: - ; - } - - notify(job, msg); - /* allow for an early exit */ - if(msg.pid == pid) - return 1; - } - return 1; - -} - -void -killzombies(void) -{ - Thread *job; - int index, status, pid; - - while((pid=waitpid(-1, &status, WNOHANG))>0){ - print(shell.err, "found zombie pid %d\n", pid); - flush(shell.err); - - job = getjob(pid, &index); - if(!job) - perror("invalid pid"); - - if(WIFEXITED(status)) - job->wait.status = Pdone; - if(WIFSTOPPED(status)) - job->wait.status = Pstop; - if(WIFCONTINUED(status)) - job->wait.status = Pagain; - - if(job->wait.status == Pdone){ - report(job,index); - deljob(job); - } - } -} -- cgit v1.2.1