| 1 | /* cloexec.c - set or clear the close-on-exec descriptor flag
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| 2 |
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| 3 | Copyright (C) 2004, 2009-2022 Free Software Foundation, Inc.
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| 4 |
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| 5 | This file is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU Lesser General Public License as
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| 7 | published by the Free Software Foundation; either version 2.1 of the
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| 8 | License, or (at your option) any later version.
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| 9 |
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| 10 | This file is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public License
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| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | /* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true,
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| 19 | or clear the flag if VALUE is false.
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| 20 | Return 0 on success, or -1 on error with 'errno' set.
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| 21 |
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| 22 | Note that on MingW, this function does NOT protect DESC from being
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| 23 | inherited into spawned children. Instead, either use dup_cloexec
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| 24 | followed by closing the original DESC, or use interfaces such as
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| 25 | open or pipe2 that accept flags like O_CLOEXEC to create DESC
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| 26 | non-inheritable in the first place. */
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| 27 |
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| 28 | int set_cloexec_flag (int desc, bool value);
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| 29 |
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| 30 | /* Duplicates a file handle FD, while marking the copy to be closed
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| 31 | prior to exec or spawn. Returns -1 and sets errno if FD could not
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| 32 | be duplicated. */
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| 33 |
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| 34 | int dup_cloexec (int fd);
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