1 /* closexec.c - set or clear the close-on-exec descriptor flag 2 3 Copyright (C) 2004, 2009-2012 Free Software Foundation, Inc. 4 5 This program is free software: you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program 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 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18 */ 19 20 #include <stdbool.h> 21 22 /* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true, 23 or clear the flag if VALUE is false. 24 Return 0 on success, or -1 on error with 'errno' set. 25 26 Note that on MingW, this function does NOT protect DESC from being 27 inherited into spawned children. Instead, either use dup_cloexec 28 followed by closing the original DESC, or use interfaces such as 29 open or pipe2 that accept flags like O_CLOEXEC to create DESC 30 non-inheritable in the first place. */ 31 32 int set_cloexec_flag (int desc, bool value); 33 34 /* Duplicates a file handle FD, while marking the copy to be closed 35 prior to exec or spawn. Returns -1 and sets errno if FD could not 36 be duplicated. */ 37 38 int dup_cloexec (int fd); 39
