52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* Copyright (C) 1991, 1992, 1996 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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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 (old, new)
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const char *old;
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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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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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