derek.holloway
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37 lines
1.5 KiB
C
37 lines
1.5 KiB
C
/* cloexec.c - set or clear the close-on-exec descriptor flag
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Copyright (C) 2004, 2009-2022 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <stdbool.h>
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/* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true,
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or clear the flag if VALUE is false.
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Return 0 on success, or -1 on error with 'errno' set.
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Note that on MingW, this function does NOT protect DESC from being
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inherited into spawned children. Instead, either use dup_cloexec
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followed by closing the original DESC, or use interfaces such as
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open or pipe2 that accept flags like O_CLOEXEC to create DESC
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non-inheritable in the first place. */
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int set_cloexec_flag (int desc, bool value);
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/* Duplicates a file handle FD, while marking the copy to be closed
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prior to exec or spawn. Returns -1 and sets errno if FD could not
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be duplicated. */
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int dup_cloexec (int fd);
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