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5e8754f9 | 1 | /* closexec.c - set or clear the close-on-exec descriptor flag |
6ec2e0f5 | 2 | |
5e8754f9 | 3 | Copyright (C) 2004, 2009-2016 Free Software Foundation, Inc. |
6ec2e0f5 SDJ |
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 | |
5e8754f9 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
6ec2e0f5 SDJ |
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); |