1 | /* cloexec.c - set or clear the close-on-exec descriptor flag |
2 | |
3 | Copyright (C) 2004, 2009-2019 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 <https://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 | |