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-rw-r--r--lib/sh/rename.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/sh/rename.c b/lib/sh/rename.c
new file mode 100644
index 0000000..e410b5e
--- /dev/null
+++ b/lib/sh/rename.c
@@ -0,0 +1,76 @@
+/*
+ * 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 */