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
32int 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
38int dup_cloexec (int fd);
39