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#include <u.h>
#include <libn.h>
static struct Flags
{
uchar f : 1;
uchar i : 1;
uchar v : 1;
} flag;
static
char *
strcpyn(char *dst, char *src, int n)
{
while(*src && n-->0)
*dst++ = *src++;
*dst = 0;
return dst;
}
static
int
mv(char *from, char *to)
{
io·Stat src, dst;
if(lstat(from, &src)) {
errorf("%s", from);
return 1;
}
if(!flag.f && !access(to, F_OK)) {
int ask = 1;
int ch, first;
if(flag.i && !access(from, F_OK))
fprintf(stderr, "overwrite %s? ", to);
else
ask = 0;
if (ask) {
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (first != 'y' || first != 'Y')
return 0;
}
}
if(!rename(from, to)) {
if (flag.v)
fprintf(stdout, "%s -> %s\n", from, to);
return 0;
}
/* TODO: errno = EXDEV */
errorf("rename: %s to %s: %s", from, to, strerror(errno));
return 1;
}
static
void
usage(void)
{
fputs("usage: mv [-fiv] source ... dest\n", stderr);
exit(1);
}
int
main(int argc, char *argv[])
{
int err, len;
io·Stat info;
char *arg, *nm, *e, path[4096];
ARGBEGIN{
case 'f':
flag.f++;
break;
case 'i':
flag.i++;
break;
case 'v':
flag.v++;
break;
default:
usage();
}ARGEND;
if(argc < 2)
usage();
if(stat(argv[argc-1],&info) || !S_ISDIR(info.st_mode)) {
if (argc > 2)
usage();
exit(mv(argv[0], argv[1]));
}
/* we know the last argument is a directory */
e = strcpyn(path, argv[argc-1], sizeof path-1);
*e++ = '/';
for(err=0; --argc; ++argv) {
arg = argv[0];
if ((nm = strrchr(arg, '/')) == nil)
nm = arg;
else {
/* case: name/ */
if (!nm[1]) {
while(nm >= arg && nm[0] == '/')
nm--;
while(nm >= arg && nm[0] != '/')
nm--;
}
nm++;
}
if ((len = strlen(nm)) >= arrend(path)-e) {
errorf("%s: path name overflow\n", arg);
err++;
continue;
}
memmove(e, nm, len+1);
err += mv(arg, path);
}
exit(err);
}
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