From 0846cebb135295fa7c838f40b11e1db15e4b7098 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 6 Sep 2005 20:00:24 +0000
Subject: [PATCH] * config/move-if-change: Don't output "$2 is unchanged";
 suggested by Ben Elliston.  Handle weird characters correctly.

---
 ChangeLog             |  5 +++++
 config/move-if-change | 27 ++++++++++++++++++---------
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 9b0b06dd..73ce3078 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-09-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* config/move-if-change: Don't output "$2 is unchanged";
+	suggested by Ben Elliston.  Handle weird characters correctly.
+
 2005-09-06  Stepan Kasal  <kasal@ucw.cz>
 
 	* lib/autoconf/libs.m4 (AC_SEARCH_LIBS): Merge the two AC_LINK_IFELSE
diff --git a/config/move-if-change b/config/move-if-change
index 5cdc3b4d..ff74a556 100755
--- a/config/move-if-change
+++ b/config/move-if-change
@@ -1,13 +1,22 @@
 #!/bin/sh
 # Like mv $1 $2, but if the files are the same, just delete $1.
-# Status is 0 if $2 is changed, 1 otherwise.
-if test -r $2; then
-  if cmp -s $1 $2; then
-    echo $2 is unchanged
-    rm -f $1
-  else
-    mv -f $1 $2
-  fi
+# Status is zero if successful, nonzero otherwise.
+
+usage="$0: usage: $0 SOURCE DEST"
+
+case $# in
+2) ;;
+*) echo "$usage" >&2; exit 1;;
+esac
+
+for arg in "$1" "$2"; do
+  case $arg in
+   -*) echo "$usage" >&2; exit 1;;
+  esac
+done
+
+if test -r "$2" && cmp -s "$1" "$2"; then
+  rm -f "$1"
 else
-  mv -f $1 $2
+  mv -f "$1" "$2"
 fi
-- 
2.11.4.GIT