1 /* rename.c -- BSD compatible directory function for System V
2 Copyright (C) 1988, 1990 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
29 #ifdef STAT_MACROS_BROKEN
31 #endif /* STAT_MACROS_BROKEN. */
33 #if !defined(S_ISDIR) && defined(S_IFDIR)
34 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
37 #include "safe-stat.h"
39 /* Rename file FROM to file TO.
40 Return 0 if successful, -1 if not. */
47 struct stat from_stats, to_stats;
50 if (SAFE_STAT (from, &from_stats))
53 /* Be careful not to unlink `from' if it happens to be equal to `to' or
54 (on filesystems that silently truncate filenames after 14 characters)
55 if `from' and `to' share the significant characters. */
56 if (SAFE_STAT (to, &to_stats))
63 if ((from_stats.st_dev == to_stats.st_dev)
64 && (from_stats.st_ino == to_stats.st_dev))
65 /* `from' and `to' designate the same file on that filesystem. */
68 if (unlink (to) && errno != ENOENT)
72 if (S_ISDIR (from_stats.st_mode))
74 /* Need a setuid root process to link and unlink directories. */
79 error (1, errno, "cannot fork");
82 execl (MVDIR, "mvdir", from, to, (char *) 0);
83 error (255, errno, "cannot run `%s'", MVDIR);
85 default: /* Parent. */
86 while (wait (&status) != pid)
89 errno = 0; /* mvdir printed the system error message. */
98 if (unlink (from) && errno != ENOENT)