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- /* cloexec.c - set or clear the close-on-exec descriptor flag
- Copyright (C) 2004, 2009-2021 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 <https://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);
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