lib/spawn_faction_init.c

   1 /* Copyright (C) 2000, 2009-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <spawn.h>
  21
  22 #include <errno.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "spawn_int.h"
  27
  28
  29 /* Function used to increase the size of the allocated array.  This
  30    function is called from the 'add'-functions.  */
  31 int
  32 __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *file_actions)
  33 {
  34   int newalloc = file_actions->_allocated + 8;
  35   void *newmem = realloc (file_actions->_actions,
  36                           newalloc * sizeof (struct __spawn_action));
  37
  38   if (newmem == NULL)
  39     /* Not enough memory.  */
  40     return ENOMEM;
  41
  42   file_actions->_actions = (struct __spawn_action *) newmem;
  43   file_actions->_allocated = newalloc;
  44
  45   return 0;
  46 }
  47
  48
  49 /* Initialize data structure for file attribute for 'spawn' call.  */
  50 int
  51 posix_spawn_file_actions_init (posix_spawn_file_actions_t *file_actions)
  52 {
  53   /* Simply clear all the elements.  */
  54   memset (file_actions, '\0', sizeof (*file_actions));
  55   return 0;
  56 }