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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/String.h>
28#include <grp.h>
29#include <pwd.h>
30#include <stdio.h>
31#include <string.h>
32#include <sys/stat.h>
33#include <unistd.h>
34
35int main(int argc, char** argv)
36{
37 if (pledge("stdio rpath chown", nullptr) < 0) {
38 perror("pledge");
39 return 1;
40 }
41
42 if (argc < 2) {
43 printf("usage: chgrp <gid> <path>\n");
44 return 0;
45 }
46
47 gid_t new_gid = -1;
48 auto gid_arg = String(argv[1]);
49
50 if (gid_arg.is_empty()) {
51 fprintf(stderr, "Empty gid option\n");
52 return 1;
53 }
54
55 bool ok;
56 new_gid = gid_arg.to_uint(ok);
57
58 if (!ok) {
59 auto* group = getgrnam(gid_arg.characters());
60 if (!group) {
61 fprintf(stderr, "Unknown group '%s'\n", gid_arg.characters());
62 return 1;
63 }
64 new_gid = group->gr_gid;
65 }
66
67 int rc = chown(argv[2], -1, new_gid);
68 if (rc < 0) {
69 perror("chgrp");
70 return 1;
71 }
72
73 return 0;
74}