| /* closexec.c - set or clear the close-on-exec descriptor flag |
| |
| Copyright (C) 2004, 2009-2016 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| */ |
| |
| #include <stdbool.h> |
| |
| /* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true, |
| or clear the flag if VALUE is false. |
| Return 0 on success, or -1 on error with 'errno' set. |
| |
| Note that on MingW, this function does NOT protect DESC from being |
| inherited into spawned children. Instead, either use dup_cloexec |
| followed by closing the original DESC, or use interfaces such as |
| open or pipe2 that accept flags like O_CLOEXEC to create DESC |
| non-inheritable in the first place. */ |
| |
| int set_cloexec_flag (int desc, bool value); |
| |
| /* Duplicates a file handle FD, while marking the copy to be closed |
| prior to exec or spawn. Returns -1 and sets errno if FD could not |
| be duplicated. */ |
| |
| int dup_cloexec (int fd); |