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- /* rename.c -- BSD compatible directory function for System V
- Copyright (C) 1988, 1990, 1992 Free Software Foundation, Inc.
-
- This program 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 2, or (at your option)
- any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <errno.h>
- #ifndef STDC_HEADERS
- extern int errno;
- #endif
-
- /* Rename file FROM to file TO.
- Return 0 if successful, -1 if not. */
-
- int
- rename (from, to)
- char *from;
- char *to;
- {
- struct stat from_stats;
-
- if (stat (from, &from_stats))
- return -1;
-
- if (unlink (to) && errno != ENOENT)
- return -1;
-
- if (link (from, to))
- return -1;
-
- if (unlink (from) && errno != ENOENT)
- {
- unlink (to);
- return -1;
- }
-
- return 0;
- }
-