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annotate lib/cloexec.h @ 40196:e63f5d3edab5

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relocatable-prog: Update documentation. * doc/relocatable-maint.texi (Supporting Relocation): Update to match the recent changes.
author Bruno Haible <bruno@clisp.org>
date Sun, 24 Feb 2019 01:49:15 +0100
parents b06060465f09
children
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f4931d86d489 cloexec: spelling fixes in comments
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1 /* cloexec.c - set or clear the close-on-exec descriptor flag
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2
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b06060465f09 maint: Run 'make update-copyright'
Paul Eggert <eggert@cs.ucla.edu>
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3 Copyright (C) 2004, 2009-2019 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program 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 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 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 */
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19
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20 #include <stdbool.h>
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21
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22 /* Set the 'FD_CLOEXEC' flag of DESC if VALUE is true,
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23 or clear the flag if VALUE is false.
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24 Return 0 on success, or -1 on error with 'errno' set.
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25
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26 Note that on MingW, this function does NOT protect DESC from being
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27 inherited into spawned children. Instead, either use dup_cloexec
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28 followed by closing the original DESC, or use interfaces such as
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29 open or pipe2 that accept flags like O_CLOEXEC to create DESC
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30 non-inheritable in the first place. */
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31
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32 int set_cloexec_flag (int desc, bool value);
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33
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34 /* Duplicates a file handle FD, while marking the copy to be closed
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35 prior to exec or spawn. Returns -1 and sets errno if FD could not
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36 be duplicated. */
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37
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38 int dup_cloexec (int fd);