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/* Test posix_spawn setsid attribute.
Copyright (C) 2017-2021 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 <spawn.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/resource.h>
#include <unistd.h>
#include <support/check.h>
static void
do_test_setsid (bool test_setsid)
{
pid_t sid, child_sid;
int res;
/* Current session ID. */
sid = getsid(0);
if (sid == (pid_t) -1)
FAIL_EXIT1 ("getsid (0): %m");
posix_spawnattr_t attrp;
/* posix_spawnattr_init should not fail (it basically memset the
attribute). */
posix_spawnattr_init (&attrp);
if (test_setsid)
{
res = posix_spawnattr_setflags (&attrp, POSIX_SPAWN_SETSID);
if (res != 0)
{
errno = res;
FAIL_EXIT1 ("posix_spawnattr_setflags: %m");
}
}
/* Program to run. */
char *args[2] = { (char *) "true", NULL };
pid_t child;
res = posix_spawnp (&child, "true", NULL, &attrp, args, environ);
/* posix_spawnattr_destroy is noop. */
posix_spawnattr_destroy (&attrp);
if (res != 0)
{
errno = res;
FAIL_EXIT1 ("posix_spawnp: %m");
}
/* Child should have a different session ID than parent. */
child_sid = getsid (child);
if (child_sid == (pid_t) -1)
FAIL_EXIT1 ("getsid (%i): %m", child);
if (test_setsid)
{
if (child_sid == sid)
FAIL_EXIT1 ("child session ID matched parent one");
}
else
{
if (child_sid != sid)
FAIL_EXIT1 ("child session ID did not match parent one");
}
}
static int
do_test (void)
{
do_test_setsid (false);
do_test_setsid (true);
return 0;
}
#include <support/test-driver.c>
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