Update.
[glibc.git] / posix / spawn_faction_addclose.c
blobb90abb1f7ac516b6779663a0b56e234364df03f1
1 /* Copyright (C) 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <errno.h>
20 #include <spawn.h>
21 #include <unistd.h>
23 #include "spawn_int.h"
25 /* Add an action to FILE-ACTIONS which tells the implementation to call
26 `close' for the given file descriptor during the `spawn' call. */
27 int
28 posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
29 int fd)
31 int maxfd = sysconf (_SC_OPEN_MAX);
32 struct __spawn_action *rec;
34 /* Test for the validity of the file descriptor. */
35 if (fd < 0 || fd >= maxfd)
36 return EBADF;
38 /* Allocate more memory of needed. */
39 if (file_actions->__used == file_actions->__allocated
40 && __posix_spawn_file_actions_realloc (file_actions) != 0)
41 /* THis can only mean we ran out of memory. */
42 return ENOMEM;
44 /* Add the new value. */
45 rec = &file_actions->__actions[file_actions->__used];
46 rec->tag = spawn_do_close;
47 rec->action.open_action.fd = fd;
49 /* Account for the new entry. */
50 ++file_actions->__used;
52 return 0;