Ying Wang | 0543663 | 2013-04-05 16:01:00 -0700 | [diff] [blame] | 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); |