105436638acc7c010349a69c3395f1a57c642dc62Ying Wang/* Copyright (C) 2000, 2009-2012 Free Software Foundation, Inc. 205436638acc7c010349a69c3395f1a57c642dc62Ying Wang This file is part of the GNU C Library. 305436638acc7c010349a69c3395f1a57c642dc62Ying Wang 405436638acc7c010349a69c3395f1a57c642dc62Ying Wang This program is free software: you can redistribute it and/or modify 505436638acc7c010349a69c3395f1a57c642dc62Ying Wang it under the terms of the GNU General Public License as published by 605436638acc7c010349a69c3395f1a57c642dc62Ying Wang the Free Software Foundation; either version 3 of the License, or 705436638acc7c010349a69c3395f1a57c642dc62Ying Wang (at your option) any later version. 805436638acc7c010349a69c3395f1a57c642dc62Ying Wang 905436638acc7c010349a69c3395f1a57c642dc62Ying Wang This program is distributed in the hope that it will be useful, 1005436638acc7c010349a69c3395f1a57c642dc62Ying Wang but WITHOUT ANY WARRANTY; without even the implied warranty of 1105436638acc7c010349a69c3395f1a57c642dc62Ying Wang MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1205436638acc7c010349a69c3395f1a57c642dc62Ying Wang GNU General Public License for more details. 1305436638acc7c010349a69c3395f1a57c642dc62Ying Wang 1405436638acc7c010349a69c3395f1a57c642dc62Ying Wang You should have received a copy of the GNU General Public License 1505436638acc7c010349a69c3395f1a57c642dc62Ying Wang along with this program. If not, see <http://www.gnu.org/licenses/>. */ 1605436638acc7c010349a69c3395f1a57c642dc62Ying Wang 1705436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <config.h> 1805436638acc7c010349a69c3395f1a57c642dc62Ying Wang 1905436638acc7c010349a69c3395f1a57c642dc62Ying Wang/* Specification. */ 2005436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <spawn.h> 2105436638acc7c010349a69c3395f1a57c642dc62Ying Wang 2205436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <errno.h> 2305436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <unistd.h> 2405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 2505436638acc7c010349a69c3395f1a57c642dc62Ying Wang#if !_LIBC 2605436638acc7c010349a69c3395f1a57c642dc62Ying Wang# define __sysconf(open_max) getdtablesize () 2705436638acc7c010349a69c3395f1a57c642dc62Ying Wang#endif 2805436638acc7c010349a69c3395f1a57c642dc62Ying Wang 2905436638acc7c010349a69c3395f1a57c642dc62Ying Wang#if !HAVE_WORKING_POSIX_SPAWN 3005436638acc7c010349a69c3395f1a57c642dc62Ying Wang# include "spawn_int.h" 3105436638acc7c010349a69c3395f1a57c642dc62Ying Wang#endif 3205436638acc7c010349a69c3395f1a57c642dc62Ying Wang 3305436638acc7c010349a69c3395f1a57c642dc62Ying Wang/* Add an action to FILE-ACTIONS which tells the implementation to call 3405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 'close' for the given file descriptor during the 'spawn' call. */ 3505436638acc7c010349a69c3395f1a57c642dc62Ying Wangint 3605436638acc7c010349a69c3395f1a57c642dc62Ying Wangposix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions, 3705436638acc7c010349a69c3395f1a57c642dc62Ying Wang int fd) 3805436638acc7c010349a69c3395f1a57c642dc62Ying Wang#undef posix_spawn_file_actions_addclose 3905436638acc7c010349a69c3395f1a57c642dc62Ying Wang{ 4005436638acc7c010349a69c3395f1a57c642dc62Ying Wang int maxfd = __sysconf (_SC_OPEN_MAX); 4105436638acc7c010349a69c3395f1a57c642dc62Ying Wang 4205436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Test for the validity of the file descriptor. */ 4305436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (fd < 0 || fd >= maxfd) 4405436638acc7c010349a69c3395f1a57c642dc62Ying Wang return EBADF; 4505436638acc7c010349a69c3395f1a57c642dc62Ying Wang 4605436638acc7c010349a69c3395f1a57c642dc62Ying Wang#if HAVE_WORKING_POSIX_SPAWN 4705436638acc7c010349a69c3395f1a57c642dc62Ying Wang return posix_spawn_file_actions_addclose (file_actions, fd); 4805436638acc7c010349a69c3395f1a57c642dc62Ying Wang#else 4905436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Allocate more memory if needed. */ 5005436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (file_actions->_used == file_actions->_allocated 5105436638acc7c010349a69c3395f1a57c642dc62Ying Wang && __posix_spawn_file_actions_realloc (file_actions) != 0) 5205436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* This can only mean we ran out of memory. */ 5305436638acc7c010349a69c3395f1a57c642dc62Ying Wang return ENOMEM; 5405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 5505436638acc7c010349a69c3395f1a57c642dc62Ying Wang { 5605436638acc7c010349a69c3395f1a57c642dc62Ying Wang struct __spawn_action *rec; 5705436638acc7c010349a69c3395f1a57c642dc62Ying Wang 5805436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Add the new value. */ 5905436638acc7c010349a69c3395f1a57c642dc62Ying Wang rec = &file_actions->_actions[file_actions->_used]; 6005436638acc7c010349a69c3395f1a57c642dc62Ying Wang rec->tag = spawn_do_close; 6105436638acc7c010349a69c3395f1a57c642dc62Ying Wang rec->action.open_action.fd = fd; 6205436638acc7c010349a69c3395f1a57c642dc62Ying Wang 6305436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Account for the new entry. */ 6405436638acc7c010349a69c3395f1a57c642dc62Ying Wang ++file_actions->_used; 6505436638acc7c010349a69c3395f1a57c642dc62Ying Wang 6605436638acc7c010349a69c3395f1a57c642dc62Ying Wang return 0; 6705436638acc7c010349a69c3395f1a57c642dc62Ying Wang } 6805436638acc7c010349a69c3395f1a57c642dc62Ying Wang#endif 6905436638acc7c010349a69c3395f1a57c642dc62Ying Wang} 70