53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/* Test duplicating a file descriptor.
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Copyright (C) 2011-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <unistd.h>
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#include "signature.h"
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SIGNATURE_CHECK (dup, int, (int));
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#include <errno.h>
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#include <fcntl.h>
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#include "macros.h"
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int
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main (void)
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{
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/* Test behaviour for invalid file descriptors. */
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{
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errno = 0;
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ASSERT (dup (-1) == -1);
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ASSERT (errno == EBADF);
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}
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{
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close (99);
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errno = 0;
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ASSERT (dup (99) == -1);
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ASSERT (errno == EBADF);
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}
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#ifdef AT_FDCWD
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{
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errno = 0;
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ASSERT (dup (AT_FDCWD) == -1);
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ASSERT (errno == EBADF);
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}
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#endif
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return test_exit_status;
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}
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