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/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
/* Rename the file OLD to NEW. */
int
DEFUN(rename, (old, new), CONST char *old AND CONST char *new)
{
int save = errno;
if (__link(old, new) < 0)
{
if (errno == EEXIST)
{
errno = save;
/* Race condition, required for 1003.1 conformance. */
if (__unlink(new) < 0 ||
__link(old, new) < 0)
return -1;
}
else
return -1;
}
if (__unlink(old) < 0)
{
save = errno;
if (__unlink(new) == 0)
errno = save;
return -1;
}
return 0;
}
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