1 /* Test all open message queues descriptors are closed during exec*.
2 Copyright (C) 2004-2021 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
29 #define OPT_AFTEREXEC 20000
30
31 static mqd_t after_exec = (mqd_t) -1;
32
33 #define CMDLINE_OPTIONS \
34 { "after-exec", required_argument, NULL, OPT_AFTEREXEC },
35
36 #define CMDLINE_PROCESS \
37 case OPT_AFTEREXEC: \
38 after_exec = (mqd_t) strtoul (optarg, NULL, 0); \
39 break;
40
41 static int
do_after_exec(void)42 do_after_exec (void)
43 {
44 int result = 0;
45
46 struct mq_attr attr;
47 if (mq_getattr (after_exec, &attr) == 0)
48 {
49 puts ("mq_getattr after exec unexpectedly succeeded");
50 result = 1;
51 }
52 else if (errno != EBADF)
53 {
54 printf ("mq_getattr after exec did not fail with EBADF: %m\n");
55 result = 1;
56 }
57
58 return result;
59 }
60
61 static int
do_test(int argc,char ** argv)62 do_test (int argc, char **argv)
63 {
64 if (after_exec != (mqd_t) -1)
65 return do_after_exec ();
66
67 char name[sizeof "/tst-mqueue7-" + sizeof (pid_t) * 3];
68 snprintf (name, sizeof (name), "/tst-mqueue7-%u", getpid ());
69
70 struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 };
71 mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr);
72
73 if (q == (mqd_t) -1)
74 {
75 printf ("mq_open failed with: %m\n");
76 return 0;
77 }
78 else if (mq_unlink (name) != 0)
79 {
80 printf ("mq_unlink failed with: %m\n");
81 return 1;
82 }
83
84 if (mq_getattr (q, &attr) != 0)
85 {
86 printf ("mq_getattr failed: %m\n");
87 return 1;
88 }
89
90 char after_exec_arg[sizeof "--after-exec=0x" + sizeof (long) * 3];
91 snprintf (after_exec_arg, sizeof (after_exec_arg),
92 "--after-exec=0x%lx", (long) q);
93
94 const char *newargv[argc + 2];
95 for (int i = 1; i < argc; ++i)
96 newargv[i - 1] = argv[i];
97 newargv[argc - 1] = "--direct";
98 newargv[argc] = after_exec_arg;
99 newargv[argc + 1] = NULL;
100
101 /* Verify that exec* has the effect of mq_close (q). */
102 execv (newargv[0], (char * const *) newargv);
103 printf ("execv failed: %m\n");
104 return 1;
105 }
106
107 #include "../test-skeleton.c"
108