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/* Test all open message queues descriptors are closed during exec*.
Copyright (C) 2004-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://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"
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