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	chgrp.c - sbase - suckless unix tools
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	---
	chgrp.c (1400B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/stat.h>
	3
	4 #include <errno.h>
	5 #include <fcntl.h>
	6 #include <grp.h>
	7 #include <unistd.h>
	8
	9 #include "fs.h"
	10 #include "util.h"
	11
	12 static int hflag = 0;
	13 static gid_t gid = -1;
	14 static int ret = 0;
	15
	16 static void
	17 chgrp(int dirfd, const char name, struct stat st, void *data, struct r…
	18 {
	19 int flags = 0;
	20
	21 if ((r->maxdepth == 0 && r->follow == 'P') \|\| (r->follow == 'H' …
	22 flags \|= AT_SYMLINK_NOFOLLOW;
	23 if (fchownat(dirfd, name, -1, gid, flags) < 0) {
	24 weprintf("chown %s:", r->path);
	25 ret = 1;
	26 } else if (S_ISDIR(st->st_mode)) {
	27 recurse(dirfd, name, NULL, r);
	28 }
	29 }
	30
	31 static void
	32 usage(void)
	33 {
	34 eprintf("usage: %s [-h] [-R [-H \| -L \| -P]] group file ...\n", a…
	35 }
	36
	37 int
	38 main(int argc, char *argv[])
	39 {
	40 struct group *gr;
	41 struct recursor r = { .fn = chgrp, .maxdepth = 1, .follow = 'P' …
	42
	43 ARGBEGIN {
	44 case 'h':
	45 hflag = 1;
	46 break;
	47 case 'R':
	48 r.maxdepth = 0;
	49 break;
	50 case 'H':
	51 case 'L':
	52 case 'P':
	53 r.follow = ARGC();
	54 break;
	55 default:
	56 usage();
	57 } ARGEND
	58
	59 if (argc < 2)
	60 usage();
	61
	62 errno = 0;
	63 if ((gr = getgrnam(argv[0]))) {
	64 gid = gr->gr_gid;
	65 } else {
	66 if (errno)
	67 eprintf("getgrnam %s:", argv[0]);
	68 gid = estrtonum(argv[0], 0, UINT_MAX);
	69 }
	70
	71 for (argc--, argv++; *argv; argc--, argv++)
	72 recurse(AT_FDCWD, *argv, NULL, &r);
	73
	74 return ret \|\| recurse_status;
	75 }