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
do_test(void)29 do_test (void)
30 {
31 if (geteuid () != 0)
32 {
33 puts ("this test requires root");
34 return 0;
35 }
36
37 char name[sizeof "/tst-mqueue9-" + sizeof (pid_t) * 3];
38 snprintf (name, sizeof (name), "/tst-mqueue9-%u", getpid ());
39
40 struct mq_attr attr = { .mq_maxmsg = 1, .mq_msgsize = 1 };
41 mqd_t q = mq_open (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 ("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 ("failed to seteuid (1): %m\n");
57 mq_unlink (name);
58 return 0;
59 }
60
61 int result = 0;
62 if (mq_unlink (name) == 0)
63 {
64 puts ("mq_unlink unexpectedly succeeded");
65 result = 1;
66 }
67 else if (errno != EACCES)
68 {
69 printf ("mq_unlink did not fail with EACCES: %m\n");
70 result = 1;;
71 }
72
73 if (seteuid (0) != 0)
74 {
75 printf ("failed to seteuid (0): %m\n");
76 result = 1;
77 }
78
79 if (mq_unlink (name) != 0)
80 {
81 printf ("mq_unlink failed with: %m\n");
82 result = 1;
83 }
84
85 if (mq_close (q) != 0)
86 {
87 printf ("mq_close failed with: %m\n");
88 result = 1;
89 }
90
91 return result;
92 }
93
94 #include "../test-skeleton.c"
95