1 /* Copyright (C) 2000, 2009, 2010 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
26 # define __sysconf(open_max) getdtablesize ()
29 #include "spawn_int.h"
31 /* Add an action to FILE-ACTIONS which tells the implementation to call
32 `close' for the given file descriptor during the `spawn' call. */
34 posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
37 int maxfd = __sysconf (_SC_OPEN_MAX);
38 struct __spawn_action *rec;
40 /* Test for the validity of the file descriptor. */
41 if (fd < 0 || fd >= maxfd)
44 /* Allocate more memory if needed. */
45 if (file_actions->_used == file_actions->_allocated
46 && __posix_spawn_file_actions_realloc (file_actions) != 0)
47 /* This can only mean we ran out of memory. */
50 /* Add the new value. */
51 rec = &file_actions->_actions[file_actions->_used];
52 rec->tag = spawn_do_close;
53 rec->action.open_action.fd = fd;
55 /* Account for the new entry. */
56 ++file_actions->_used;