File: spawn_faction_init.c

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/* Copyright (C) 2000-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <spawn.h>
#include <stdlib.h>
#include <string.h>

#include "spawn_int.h"


/* Function used to increase the size of the allocated array.  This
   function is called from the `add'-functions.  */
int
__posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *file_actions)
{
  int newalloc = file_actions->__allocated + 8;
  void *newmem = realloc (file_actions->__actions,
			  newalloc * sizeof (struct __spawn_action));

  if (newmem == NULL)
    /* Not enough memory.  */
    return ENOMEM;

  file_actions->__actions = (struct __spawn_action *) newmem;
  file_actions->__allocated = newalloc;

  return 0;
}


/* Initialize data structure for file attribute for `spawn' call.  */
int
posix_spawn_file_actions_init (posix_spawn_file_actions_t *file_actions)
{
  /* Simply clear all the elements.  */
  memset (file_actions, '\0', sizeof (*file_actions));
  return 0;
}