/* cloexec.c - set or clear the close-on-exec descriptor flag Copyright (C) 2004, 2009-2020 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); |