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/*
* rename - rename a file
*/
/* Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#if !defined (HAVE_RENAME)
#include <bashtypes.h>
#include <posixstat.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include <errno.h>
#include <stdc.h>
#ifndef errno
extern int errno;
#endif
int
rename (from, to)
const char *from, *to;
{
struct stat fb, tb;
if (stat (from, &fb) < 0)
return -1;
if (stat (to, &tb) < 0)
{
if (errno != ENOENT)
return -1;
}
else
{
if (fb.st_dev == tb.st_dev && fb.st_ino == tb.st_ino)
return 0; /* same file */
if (unlink (to) < 0 && errno != ENOENT)
return -1;
}
if (link (from, to) < 0)
return (-1);
if (unlink (from) < 0 && errno != ENOENT)
{
int e = errno;
unlink (to);
errno = e;
return (-1);
}
return (0);
}
#endif /* !HAVE_RENAME */
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