posix/spawn_faction_addchdir.c

   1 /* Add a directory change to a file action list for posix_spawn.
   2    Copyright (C) 2000-2020 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 <errno.h>
  20 #include <spawn.h>
  21 #include <string.h>
  22
  23 #include "spawn_int.h"
  24
  25 int
  26 posix_spawn_file_actions_addchdir_np (posix_spawn_file_actions_t *file_actions,
  27                                       const char *path)
  28 {
  29   struct __spawn_action *rec;
  30
  31   char *path_copy = __strdup (path);
  32   if (path_copy == NULL)
  33     return ENOMEM;
  34
  35   /* Allocate more memory if needed.  */
  36   if (file_actions->__used == file_actions->__allocated
  37       && __posix_spawn_file_actions_realloc (file_actions) != 0)
  38     {
  39       /* This can only mean we ran out of memory.  */
  40       free (path_copy);
  41       return ENOMEM;
  42     }
  43
  44   /* Add the new value.  */
  45   rec = &file_actions->__actions[file_actions->__used];
  46   rec->tag = spawn_do_chdir;
  47   rec->action.chdir_action.path = path_copy;
  48
  49   /* Account for the new entry.  */
  50   ++file_actions->__used;
  51
  52   return 0;
  53 }