1 | /* closexec.c - set or clear the close-on-exec descriptor flag
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2 |
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3 | Copyright (C) 2004, 2009-2016 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 <http://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);
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