posix/spawn_faction_init.c

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <spawn.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "spawn_int.h"
  25
  26
  27 /* Function used to increase the size of the allocated array.  This
  28    function is called from the `add'-functions.  */
  29 int
  30 __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *file_actions)
  31 {
  32   int newalloc = file_actions->__allocated + 8;
  33   void *newmem = realloc (file_actions->__actions,
  34                           newalloc * sizeof (struct __spawn_action));
  35
  36   if (newmem == NULL)
  37     /* Not enough memory.  */
  38     return ENOMEM;
  39
  40   file_actions->__actions = (struct __spawn_action *) newmem;
  41   file_actions->__allocated = newalloc;
  42
  43   return 0;
  44 }
  45
  46
  47 /* Initialize data structure for file attribute for `spawn' call.  */
  48 int
  49 posix_spawn_file_actions_init (posix_spawn_file_actions_t *file_actions)
  50 {
  51   /* Simply clear all the elements.  */
  52   memset (file_actions, '\0', sizeof (*file_actions));
  53   return 0;
  54 }