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49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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/* Rename the file OLD to NEW. */
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int
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rename (const char *old, const char *new)
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{
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int save = errno;
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if (__link (old, new) < 0)
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{
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if (errno == EEXIST)
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{
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__set_errno (save);
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/* Race condition, required for 1003.1 conformance. */
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if (__unlink (new) < 0
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|| __link (old, new) < 0)
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return -1;
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}
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else
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return -1;
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}
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if (__unlink (old) < 0)
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{
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save = errno;
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if (__unlink (new) == 0)
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__set_errno (save);
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return -1;
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}
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return 0;
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}
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