posix/tst-spawn2.c

   1 /* Further tests for spawn in case of invalid binary paths.
   2    Copyright (C) 2016-2023 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    <https://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 #include <stdio.h>
  27
  28 #include <support/check.h>
  29
  30 int
  31 do_test (void)
  32 {
  33   /* Check if posix_spawn correctly returns an error and an invalid pid
  34      by trying to spawn an invalid binary.  */
  35
  36   const char *program = "/path/to/invalid/binary";
  37   char * const args[] = { 0 };
  38   pid_t pid = -1;
  39
  40   int ret = posix_spawn (&pid, program, 0, 0, args, environ);
  41   if (ret != ENOENT)
  42     {
  43       errno = ret;
  44       FAIL_EXIT1 ("posix_spawn: %m");
  45     }
  46
  47   /* POSIX states the value returned on pid variable in case of an error
  48      is not specified.  GLIBC will update the value iff the child
  49      execution is successful.  */
  50   if (pid != -1)
  51     FAIL_EXIT1 ("posix_spawn returned pid != -1 (%i)", (int) pid);
  52
  53   /* Check if no child is actually created.  */
  54   ret = waitpid (-1, NULL, 0);
  55   if (ret != -1 || errno != ECHILD)
  56     FAIL_EXIT1 ("waitpid: %m)");
  57
  58   /* Same as before, but with posix_spawnp.  */
  59   char *args2[] = { (char*) program, 0 };
  60
  61   ret = posix_spawnp (&pid, args2[0], 0, 0, args2, environ);
  62   if (ret != ENOENT)
  63     {
  64       errno = ret;
  65       FAIL_EXIT1 ("posix_spawnp: %m");
  66     }
  67
  68   if (pid != -1)
  69     FAIL_EXIT1 ("posix_spawnp returned pid != -1 (%i)", (int) pid);
  70
  71   ret = waitpid (-1, NULL, 0);
  72   if (ret != -1 || errno != ECHILD)
  73     FAIL_EXIT1 ("waitpid: %m)");
  74
  75   return 0;
  76 }
  77
  78 #include <support/test-driver.c>