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/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <limits.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "fs.h"
#include "util.h"
static int hflag = 0;
static uid_t uid = -1;
static gid_t gid = -1;
static int ret = 0;
static void
chownpwgr(int dirfd, const char *name, struct stat *st, void *data, struct recursor *r)
{
int flags = 0;
if ((r->maxdepth == 0 && r->follow == 'P') || (r->follow == 'H' && r->depth) || (hflag && !(r->depth)))
flags |= AT_SYMLINK_NOFOLLOW;
if (fchownat(dirfd, name, uid, gid, flags) < 0) {
weprintf("chown %s:", r->path);
ret = 1;
} else if (S_ISDIR(st->st_mode)) {
recurse(dirfd, name, NULL, r);
}
}
static void
usage(void)
{
eprintf("usage: %s [-h] [-R [-H | -L | -P]] owner[:[group]] file ...\n"
" %s [-h] [-R [-H | -L | -P]] :group file ...\n",
argv0, argv0);
}
int
main(int argc, char *argv[])
{
struct group *gr;
struct passwd *pw;
struct recursor r = { .fn = chownpwgr, .maxdepth = 1, .follow = 'P' };
char *owner, *group;
ARGBEGIN {
case 'h':
hflag = 1;
break;
case 'r':
case 'R':
r.maxdepth = 0;
break;
case 'H':
case 'L':
case 'P':
r.follow = ARGC();
break;
default:
usage();
} ARGEND
if (argc < 2)
usage();
owner = argv[0];
if ((group = strchr(owner, ':')))
*group++ = '\0';
if (owner && *owner) {
errno = 0;
pw = getpwnam(owner);
if (pw) {
uid = pw->pw_uid;
} else {
if (errno)
eprintf("getpwnam %s:", owner);
uid = estrtonum(owner, 0, UINT_MAX);
}
}
if (group && *group) {
errno = 0;
gr = getgrnam(group);
if (gr) {
gid = gr->gr_gid;
} else {
if (errno)
eprintf("getgrnam %s:", group);
gid = estrtonum(group, 0, UINT_MAX);
}
}
if (uid == (uid_t)-1 && gid == (gid_t)-1)
usage();
for (argc--, argv++; *argv; argc--, argv++)
recurse(AT_FDCWD, *argv, NULL, &r);
return ret || recurse_status;
}