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#include "rc.h"
struct Wait
{
int len, cap, *pid;
};
static struct Wait wait;
// -----------------------------------------------------------------------
// 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
clearwait(void)
{
wait.len = 0;
}
int
havewait(int pid)
{
int i;
for(i=0; i<wait.len; i++)
if(wait.pid[i] == pid)
return 1;
return 0;
}
void
addwait(int pid)
{
if(wait.len == wait.cap){
wait.cap = wait.cap + 2;
wait.pid = erealloc(wait.pid, wait.cap*sizeof(*wait.pid));
}
wait.pid[wait.len++] = pid;
}
/*
int
waitfor(int pid)
{
Thread *p;
struct WaitMsg *w;
char errbuf[ERRMAX];
if(pid >= 0 && !havewait(pid))
return 0;
}
*/
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){
strcat(file, "/");
nc++;
}
if(nc+strlen(argv[1]) < 1024){
strcat(file, argv[1]);
execve(file, argv+1, env);
}else
fatal("command name too long");
}
}
efree(argv);
fatal("failed to exec\n");
}
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