1 | /* Copyright (C) 2004-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <mqueue.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <unistd.h> |
24 | #include <support/check.h> |
25 | #include "tst-mqueue.h" |
26 | |
27 | #define TEST_FUNCTION do_test () |
28 | static int |
29 | do_test (void) |
30 | { |
31 | if (geteuid () != 0) |
32 | { |
33 | puts (s: "this test requires root" ); |
34 | return 0; |
35 | } |
36 | |
37 | char name[sizeof "/tst-mqueue9-" + sizeof (pid_t) * 3]; |
38 | snprintf (s: name, maxlen: sizeof (name), format: "/tst-mqueue9-%u" , getpid ()); |
39 | |
40 | struct mq_attr attr = { .mq_maxmsg = 1, .mq_msgsize = 1 }; |
41 | mqd_t q = mq_open (name: name, O_CREAT | O_EXCL | O_RDWR, 0600, &attr); |
42 | |
43 | if (q == (mqd_t) -1) |
44 | { |
45 | if (errno == ENOSYS) |
46 | FAIL_UNSUPPORTED ("mq_open not supported" ); |
47 | |
48 | printf (format: "mq_open failed with: %m\n" ); |
49 | return 1; |
50 | } |
51 | |
52 | add_temp_mq (name); |
53 | |
54 | if (seteuid (1) != 0) |
55 | { |
56 | printf (format: "failed to seteuid (1): %m\n" ); |
57 | mq_unlink (name: name); |
58 | return 0; |
59 | } |
60 | |
61 | int result = 0; |
62 | if (mq_unlink (name: name) == 0) |
63 | { |
64 | puts (s: "mq_unlink unexpectedly succeeded" ); |
65 | result = 1; |
66 | } |
67 | else if (errno != EACCES) |
68 | { |
69 | printf (format: "mq_unlink did not fail with EACCES: %m\n" ); |
70 | result = 1;; |
71 | } |
72 | |
73 | if (seteuid (0) != 0) |
74 | { |
75 | printf (format: "failed to seteuid (0): %m\n" ); |
76 | result = 1; |
77 | } |
78 | |
79 | if (mq_unlink (name: name) != 0) |
80 | { |
81 | printf (format: "mq_unlink failed with: %m\n" ); |
82 | result = 1; |
83 | } |
84 | |
85 | if (mq_close (mqdes: q) != 0) |
86 | { |
87 | printf (format: "mq_close failed with: %m\n" ); |
88 | result = 1; |
89 | } |
90 | |
91 | return result; |
92 | } |
93 | |
94 | #include "../test-skeleton.c" |
95 | |