tst-spawn2.c

/* Further tests for spawn in case of invalid binary paths.
   Copyright (C) 2016 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 <spawn.h>
#include <error.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>

#include <stdio.h>

int
posix_spawn_test (void)
{
  /* Check if posix_spawn correctly returns an error and an invalid pid
     by trying to spawn an invalid binary.  */

  const char *program = "/path/to/invalid/binary";
  char * const args[] = { 0 };
  pid_t pid = -1;

  int ret = posix_spawn (&pid, program, 0, 0, args, environ);
  if (ret != ENOENT)
    error (EXIT_FAILURE, errno, "posix_spawn");

  /* POSIX states the value returned on pid variable in case of an error
     is not specified.  GLIBC will update the value iff the child
     execution is successful.  */
  if (pid != -1)
    error (EXIT_FAILURE, errno, "posix_spawn returned pid != -1");

  /* Check if no child is actually created.  */
  ret = waitpid (-1, NULL, 0);
  if (ret != -1 || errno != ECHILD)
    error (EXIT_FAILURE, errno, "waitpid");

  /* Same as before, but with posix_spawnp.  */
  char *args2[] = { (char*) program, 0 };

  ret = posix_spawnp (&pid, args2[0], 0, 0, args2, environ);
  if (ret != ENOENT)
    error (EXIT_FAILURE, errno, "posix_spawnp");

  if (pid != -1)
    error (EXIT_FAILURE, errno, "posix_spawnp returned pid != -1");

  ret = waitpid (-1, NULL, 0);
  if (ret != -1 || errno != ECHILD)
    error (EXIT_FAILURE, errno, "waitpid");

  return 0;
}

#define TEST_FUNCTION  posix_spawn_test ()
#include "../test-skeleton.c"