sbase/chmod.c
Laslo Hunhold e92a1aef54 Handle { NULL } argv[] properly in manual arg-reduction
Thanks izabera for reporting this!
2017-08-05 23:50:39 +02:00

83 lines
1.6 KiB
C

/* See LICENSE file for copyright and license details. */
#include <sys/stat.h>
#include "fs.h"
#include "util.h"
static char *modestr = "";
static mode_t mask = 0;
static int ret = 0;
static void
chmodr(const char *path, struct stat *st, void *data, struct recursor *r)
{
mode_t m;
m = parsemode(modestr, st->st_mode, mask);
if (chmod(path, m) < 0) {
weprintf("chmod %s:", path);
ret = 1;
} else if (S_ISDIR(st->st_mode)) {
recurse(path, NULL, r);
}
}
static void
usage(void)
{
eprintf("usage: %s [-R [-H | -L | -P]] mode file ...\n", argv0);
}
int
main(int argc, char *argv[])
{
struct recursor r = { .fn = chmodr, .hist = NULL, .depth = 0, .maxdepth = 1,
.follow = 'P', .flags = 0 };
size_t i;
argv0 = *argv, argv0 ? (argc--, argv++) : (void *)0;
for (; *argv && (*argv)[0] == '-'; argc--, argv++) {
if (!(*argv)[1])
usage();
for (i = 1; (*argv)[i]; i++) {
switch ((*argv)[i]) {
case 'R':
r.maxdepth = 0;
break;
case 'H':
case 'L':
case 'P':
r.follow = (*argv)[i];
break;
case 'r': case 'w': case 'x': case 's': case 't':
/* -[rwxst] are valid modes, so we're done */
if (i == 1)
goto done;
/* fallthrough */
case '-':
/* -- terminator */
if (i == 1 && !(*argv)[i + 1]) {
argv++;
argc--;
goto done;
}
/* fallthrough */
default:
usage();
}
}
}
done:
mask = getumask();
modestr = *argv;
if (argc < 2)
usage();
for (--argc, ++argv; *argv; argc--, argv++)
recurse(*argv, NULL, &r);
return ret || recurse_status;
}