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glibc/rt/tst-mqueue7.c
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/* Test all open message queues descriptors are closed during exec*. | |
Copyright (C) 2004-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <fcntl.h> | |
#include <mqueue.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <sys/wait.h> | |
#include <time.h> | |
#include <unistd.h> | |
#define OPT_AFTEREXEC 20000 | |
static mqd_t after_exec = (mqd_t) -1; | |
#define CMDLINE_OPTIONS \ | |
{ "after-exec", required_argument, NULL, OPT_AFTEREXEC }, | |
#define CMDLINE_PROCESS \ | |
case OPT_AFTEREXEC: \ | |
after_exec = (mqd_t) strtoul (optarg, NULL, 0); \ | |
break; | |
static int | |
do_after_exec (void) | |
{ | |
int result = 0; | |
struct mq_attr attr; | |
if (mq_getattr (after_exec, &attr) == 0) | |
{ | |
puts ("mq_getattr after exec unexpectedly succeeded"); | |
result = 1; | |
} | |
else if (errno != EBADF) | |
{ | |
printf ("mq_getattr after exec did not fail with EBADF: %m\n"); | |
result = 1; | |
} | |
return result; | |
} | |
static int | |
do_test (int argc, char **argv) | |
{ | |
if (after_exec != (mqd_t) -1) | |
return do_after_exec (); | |
char name[sizeof "/tst-mqueue7-" + sizeof (pid_t) * 3]; | |
snprintf (name, sizeof (name), "/tst-mqueue7-%u", getpid ()); | |
struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 }; | |
mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr); | |
if (q == (mqd_t) -1) | |
{ | |
printf ("mq_open failed with: %m\n"); | |
return 0; | |
} | |
else if (mq_unlink (name) != 0) | |
{ | |
printf ("mq_unlink failed with: %m\n"); | |
return 1; | |
} | |
if (mq_getattr (q, &attr) != 0) | |
{ | |
printf ("mq_getattr failed: %m\n"); | |
return 1; | |
} | |
char after_exec_arg[sizeof "--after-exec=0x" + sizeof (long) * 3]; | |
snprintf (after_exec_arg, sizeof (after_exec_arg), | |
"--after-exec=0x%lx", (long) q); | |
const char *newargv[argc + 2]; | |
for (int i = 1; i < argc; ++i) | |
newargv[i - 1] = argv[i]; | |
newargv[argc - 1] = "--direct"; | |
newargv[argc] = after_exec_arg; | |
newargv[argc + 1] = NULL; | |
/* Verify that exec* has the effect of mq_close (q). */ | |
execv (newargv[0], (char * const *) newargv); | |
printf ("execv failed: %m\n"); | |
return 1; | |
} | |
#include "../test-skeleton.c" |