1 /* Copyright (C) 2004-2021 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 "tst-mqueue.h"
25
26 #define TEST_FUNCTION do_test ()
27 static int
do_test(void)28 do_test (void)
29 {
30 if (geteuid () != 0)
31 {
32 puts ("this test requires root");
33 return 0;
34 }
35
36 char name[sizeof "/tst-mqueue9-" + sizeof (pid_t) * 3];
37 snprintf (name, sizeof (name), "/tst-mqueue9-%u", getpid ());
38
39 struct mq_attr attr = { .mq_maxmsg = 1, .mq_msgsize = 1 };
40 mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_RDWR, 0600, &attr);
41
42 if (q == (mqd_t) -1)
43 {
44 printf ("mq_open failed with: %m\n");
45 return 0;
46 }
47 else
48 add_temp_mq (name);
49
50 if (seteuid (1) != 0)
51 {
52 printf ("failed to seteuid (1): %m\n");
53 mq_unlink (name);
54 return 0;
55 }
56
57 int result = 0;
58 if (mq_unlink (name) == 0)
59 {
60 puts ("mq_unlink unexpectedly succeeded");
61 result = 1;
62 }
63 else if (errno != EACCES)
64 {
65 printf ("mq_unlink did not fail with EACCES: %m\n");
66 result = 1;;
67 }
68
69 if (seteuid (0) != 0)
70 {
71 printf ("failed to seteuid (0): %m\n");
72 result = 1;
73 }
74
75 if (mq_unlink (name) != 0)
76 {
77 printf ("mq_unlink failed with: %m\n");
78 result = 1;
79 }
80
81 if (mq_close (q) != 0)
82 {
83 printf ("mq_close failed with: %m\n");
84 result = 1;
85 }
86
87 return result;
88 }
89
90 #include "../test-skeleton.c"
91