lib/spawn_faction_addchdir.c

   1 /* Copyright (C) 2018-2019 Free Software Foundation, Inc.
   2
   3    This program is free software: you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; either version 3 of the License, or
   6    (at your option) any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  15
  16 #include <config.h>
  17
  18 /* Specification.  */
  19 #include <spawn.h>
  20
  21 #include <errno.h>
  22
  23 #if REPLACE_POSIX_SPAWN
  24 # include "spawn_int.h"
  25 #endif
  26
  27 /* Add an action to FILE-ACTIONS which tells the implementation to call
  28    'chdir' to the given directory during the 'spawn' call.  */
  29 int
  30 posix_spawn_file_actions_addchdir (posix_spawn_file_actions_t *file_actions,
  31                                    const char *path)
  32 #undef posix_spawn_file_actions_addchdir
  33 {
  34 #if !REPLACE_POSIX_SPAWN
  35   return posix_spawn_file_actions_addchdir_np (file_actions, path);
  36 #else
  37   /* Allocate more memory if needed.  */
  38   if (file_actions->_used == file_actions->_allocated
  39       && __posix_spawn_file_actions_realloc (file_actions) != 0)
  40     /* This can only mean we ran out of memory.  */
  41     return ENOMEM;
  42
  43   {
  44     struct __spawn_action *rec;
  45
  46     /* Add the new value.  */
  47     rec = &file_actions->_actions[file_actions->_used];
  48     rec->tag = spawn_do_chdir;
  49     rec->action.chdir_action.path = path;
  50
  51     /* Account for the new entry.  */
  52     ++file_actions->_used;
  53
  54     return 0;
  55   }
  56 #endif
  57 }