posix/tst-spawn2.c

   1 /* Further tests for spawn in case of invalid binary paths.
   2    Copyright (C) 2016-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <spawn.h>
  20 #include <error.h>
  21 #include <errno.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <sys/wait.h>
  26
  27 #include <stdio.h>
  28
  29 int
  30 posix_spawn_test (void)
  31 {
  32   /* Check if posix_spawn correctly returns an error and an invalid pid
  33      by trying to spawn an invalid binary.  */
  34
  35   const char *program = "/path/to/invalid/binary";
  36   char * const args[] = { 0 };
  37   pid_t pid = -1;
  38
  39   int ret = posix_spawn (&pid, program, 0, 0, args, environ);
  40   if (ret != ENOENT)
  41     error (EXIT_FAILURE, errno, "posix_spawn");
  42
  43   /* POSIX states the value returned on pid variable in case of an error
  44      is not specified.  GLIBC will update the value iff the child
  45      execution is successful.  */
  46   if (pid != -1)
  47     error (EXIT_FAILURE, errno, "posix_spawn returned pid != -1");
  48
  49   /* Check if no child is actually created.  */
  50   ret = waitpid (-1, NULL, 0);
  51   if (ret != -1 || errno != ECHILD)
  52     error (EXIT_FAILURE, errno, "waitpid");
  53
  54   /* Same as before, but with posix_spawnp.  */
  55   char *args2[] = { (char*) program, 0 };
  56
  57   ret = posix_spawnp (&pid, args2[0], 0, 0, args2, environ);
  58   if (ret != ENOENT)
  59     error (EXIT_FAILURE, errno, "posix_spawnp");
  60
  61   if (pid != -1)
  62     error (EXIT_FAILURE, errno, "posix_spawnp returned pid != -1");
  63
  64   ret = waitpid (-1, NULL, 0);
  65   if (ret != -1 || errno != ECHILD)
  66     error (EXIT_FAILURE, errno, "waitpid");
  67
  68   return 0;
  69 }
  70
  71 #define TEST_FUNCTION  posix_spawn_test ()
  72 #include "../test-skeleton.c"