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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;
- }
-