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annotate tests/test-dup.c @ 17530:8981b79e1271

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error: make the module depend on vfprintf-posix * modules/error (Depends-on): Add vfprintf-posix, since error calls vfprintf unconditionally, via error_tail.
author Jim Meyering <meyering@fb.com>
date Sat, 12 Oct 2013 19:28:40 -0700
parents 3a09cc104f4c
children 344018b6e5d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Test duplicating a file descriptor.
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2 Copyright (C) 2011-2013 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 #include <config.h>
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18
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19 #include <unistd.h>
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20
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21 #include "signature.h"
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22 SIGNATURE_CHECK (dup, int, (int));
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23
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24 #include <errno.h>
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25
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26 #include "macros.h"
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27
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28 int
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29 main (void)
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30 {
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31 /* Test behaviour for invalid file descriptors. */
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32 {
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33 errno = 0;
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34 ASSERT (dup (-1) == -1);
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35 ASSERT (errno == EBADF);
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36 }
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37 {
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38 close (99);
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39 errno = 0;
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40 ASSERT (dup (99) == -1);
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41 ASSERT (errno == EBADF);
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42 }
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43
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44 return 0;
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45 }