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 __posix_spawn_file_actions_addclosefrom(posix_spawn_file_actions_t * file_actions,int from)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 } 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