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/* vi: set sw=4 ts=4:
*
* chmod.c - Change file mode bits
*
* Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* See http://pubs.opengroup.org/onlinepubs/009695399/utilities/chmod.html
*
USE_CHMOD(NEWTOY(chmod, "<2Rfv", TOYFLAG_BIN))
config CHMOD
bool "chmod"
default n
help
usage: chmod [-R] [-f] [-v] mode file...
Change mode bits of one or more files.
-R recurse into subdirectories.
-f suppress most error messages.
-v verbose output.
*/
#include "toys.h"
#define FLAG_R 4
#define FLAG_f 2
#define FLAG_v 1
DEFINE_GLOBALS(
long mode;
)
#define TT this.chmod
static int do_chmod(const char *path) {
int ret = chmod(path, TT.mode);
if (toys.optflags & FLAG_v)
xprintf("chmod(%04o, %s)\n", TT.mode, path);
if (ret == -1 && !(toys.optflags & FLAG_f))
perror_msg("changing perms of '%s' to %04o", path, TT.mode);
toys.exitval |= ret;
return ret;
}
// Copied from toys/cp.c:cp_node()
int chmod_node(char *path, struct dirtree *node)
{
char *s = path + strlen(path);
struct dirtree *n = node;
for ( ; ; n = n->parent) {
while (s!=path) {
if (*(--s) == '/') break;
}
if (!n) break;
}
if (s != path) s++;
do_chmod(s);
return 0;
}
void chmod_main(void)
{
char **s;
TT.mode = strtoul(*toys.optargs, NULL, 8);
if (toys.optflags & FLAG_R) {
// Recurse into subdirectories
for (s=toys.optargs + 1; *s; s++) {
struct stat sb;
if (stat(*s, &sb) == -1) {
if (!(toys.optflags & FLAG_f))
perror_msg("%s", *s);
continue;
}
do_chmod(*s);
if (S_ISDIR(sb.st_mode)) {
strncpy(toybuf, *s, sizeof(toybuf) - 1);
toybuf[sizeof(toybuf) - 1] = 0;
dirtree_read(toybuf, NULL, chmod_node);
}
}
} else {
// Do not recurse
for (s=toys.optargs + 1; *s; s++) {
do_chmod(*s);
}
}
}
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