1/* Test all open message queues descriptors are closed during exec*.
2 Copyright (C) 2004-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <fcntl.h>
21#include <mqueue.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/wait.h>
26#include <time.h>
27#include <unistd.h>
28#include <support/check.h>
29
30#define OPT_AFTEREXEC 20000
31
32static mqd_t after_exec = (mqd_t) -1;
33
34#define CMDLINE_OPTIONS \
35 { "after-exec", required_argument, NULL, OPT_AFTEREXEC },
36
37#define CMDLINE_PROCESS \
38 case OPT_AFTEREXEC: \
39 after_exec = (mqd_t) strtoul (optarg, NULL, 0); \
40 break;
41
42static int
43do_after_exec (void)
44{
45 int result = 0;
46
47 struct mq_attr attr;
48 if (mq_getattr (mqdes: after_exec, mqstat: &attr) == 0)
49 {
50 puts (s: "mq_getattr after exec unexpectedly succeeded");
51 result = 1;
52 }
53 else if (errno != EBADF)
54 {
55 printf (format: "mq_getattr after exec did not fail with EBADF: %m\n");
56 result = 1;
57 }
58
59 return result;
60}
61
62static int
63do_test (int argc, char **argv)
64{
65 if (after_exec != (mqd_t) -1)
66 return do_after_exec ();
67
68 char name[sizeof "/tst-mqueue7-" + sizeof (pid_t) * 3];
69 snprintf (s: name, maxlen: sizeof (name), format: "/tst-mqueue7-%u", getpid ());
70
71 struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 };
72 mqd_t q = mq_open (name: name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr);
73
74 if (q == (mqd_t) -1)
75 {
76 printf (format: "mq_open failed with: %m\n");
77 return 0;
78 }
79 else if (mq_unlink (name: name) != 0)
80 {
81 printf (format: "mq_unlink failed with: %m\n");
82 return 1;
83 }
84
85 if (mq_getattr (mqdes: q, mqstat: &attr) != 0)
86 {
87 printf (format: "mq_getattr failed: %m\n");
88 return 1;
89 }
90
91 char after_exec_arg[sizeof "--after-exec=0x" + sizeof (long) * 3];
92 snprintf (s: after_exec_arg, maxlen: sizeof (after_exec_arg),
93 format: "--after-exec=0x%lx", (long) q);
94
95 const char *newargv[argc + 2];
96 for (int i = 1; i < argc; ++i)
97 newargv[i - 1] = argv[i];
98 newargv[argc - 1] = "--direct";
99 newargv[argc] = after_exec_arg;
100 newargv[argc + 1] = NULL;
101
102 /* Verify that exec* has the effect of mq_close (q). */
103 execv (path: newargv[0], argv: (char * const *) newargv);
104 printf (format: "execv failed: %m\n");
105 return 1;
106}
107
108#include "../test-skeleton.c"
109

source code of glibc/rt/tst-mqueue7.c