1/* Add a closefrom to a file action list for posix_spawn.
2 Copyright (C) 2021-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <spawn.h>
21#include <unistd.h>
22#include <spawn_int.h>
23
24int
25__posix_spawn_file_actions_addclosefrom (posix_spawn_file_actions_t
26 *file_actions, int from)
27{
28#if __SPAWN_SUPPORT_CLOSEFROM
29 struct __spawn_action *rec;
30
31 if (!__spawn_valid_fd (from))
32 return EBADF;
33
34 /* Allocate more memory if needed. */
35 if (file_actions->__used == file_actions->__allocated
36 && __posix_spawn_file_actions_realloc (file_actions) != 0)
37 /* This can only mean we ran out of memory. */
38 return ENOMEM;
39
40 /* Add the new value. */
41 rec = &file_actions->__actions[file_actions->__used];
42 rec->tag = spawn_do_closefrom;
43 rec->action.closefrom_action.from = from;
44
45 /* Account for the new entry. */
46 ++file_actions->__used;
47
48 return 0;
49#else
50 return EINVAL;
51#endif
52}
53weak_alias (__posix_spawn_file_actions_addclosefrom,
54 posix_spawn_file_actions_addclosefrom_np)
55#if !__SPAWN_SUPPORT_CLOSEFROM
56stub_warning (posix_spawn_file_actions_addclosefrom_np)
57#endif
58