1 /* Copyright (C) 2000 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 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 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <http://www.gnu.org/licenses/>. */ 17 18 #include <errno.h> 19 #include <spawn.h> 20 #include <unistd.h> 21 22 #include "spawn_int.h" 23 24 /* Add an action to FILE-ACTIONS which tells the implementation to call 25 `close' for the given file descriptor during the `spawn' call. */ 26 int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t * file_actions,int fd)27posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *file_actions, 28 int fd) 29 { 30 int maxfd = sysconf(_SC_OPEN_MAX); 31 struct __spawn_action *rec; 32 33 /* Test for the validity of the file descriptor. */ 34 if (fd < 0 || fd >= maxfd) 35 return EBADF; 36 37 /* Allocate more memory if needed. */ 38 if (file_actions->__used == file_actions->__allocated 39 && __posix_spawn_file_actions_realloc(file_actions) != 0) 40 /* This can only mean we ran out of memory. */ 41 return ENOMEM; 42 43 /* Add the new value. */ 44 rec = &file_actions->__actions[file_actions->__used]; 45 rec->tag = spawn_do_close; 46 rec->action.open_action.fd = fd; 47 48 /* Account for the new entry. */ 49 ++file_actions->__used; 50 return 0; 51 } 52