From: Sami Kerola <kerolasa@iki.fi>
Date: Sat, 20 May 2017 09:41:23 +0000 (+0100)
Subject: rename: notice when expression and replacement are the same string
X-Git-Tag: v2.31-rc1~304
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9f430c8a5ba842465ac72b3a101cb66ba3848959;p=thirdparty%2Futil-linux.git

rename: notice when expression and replacement are the same string

The rename(1) can exit early when replace expression and replacement are
identical string.  It is also appropriate to change return value in this
case to 'nothing was renamed'.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---

diff --git a/misc-utils/rename.c b/misc-utils/rename.c
index b06a2d969b..8230ac3da0 100644
--- a/misc-utils/rename.c
+++ b/misc-utils/rename.c
@@ -204,6 +204,9 @@ int main(int argc, char **argv)
 	from = argv[0];
 	to = argv[1];
 
+	if (!strcmp(from, to))
+		return RENAME_EXIT_NOTHING;
+
 	for (i = 2; i < argc; i++)
 		ret |= do_rename(from, to, argv[i], verbose, noact, nooverwrite);