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