/* Test posix_spawn setsid attribute.

   Copyright (C) 2017-2018 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

   <http://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>