| 1 | /* Add a closefrom to a file action list for posix_spawn. |
|---|---|
| 2 | Copyright (C) 2021-2022 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 | |
| 24 | int |
| 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 (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 | } |
| 53 | weak_alias (__posix_spawn_file_actions_addclosefrom, |
| 54 | posix_spawn_file_actions_addclosefrom_np) |
| 55 | #if !__SPAWN_SUPPORT_CLOSEFROM |
| 56 | stub_warning (posix_spawn_file_actions_addclosefrom_np) |
| 57 | #endif |
| 58 |