Import from Autoconf sources:

	2005-09-06  Paul Eggert  <eggert@cs.ucla.edu>
	* move-if-change: Don't output "$2 is unchanged"; suggested by Ben
	Elliston.  Handle weird characters correctly.

diff --git a/ChangeLog b/ChangeLog
index 40ad17224b189eee76dd52591a3fb8b28aa4f5b4..069289f158785a67058edf3773680a7e133fca24 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2005-09-07  Ben Elliston  <bje@au.ibm.com>
+
+       Import from Autoconf sources:
+
+       2005-09-06  Paul Eggert  <eggert@cs.ucla.edu>
+       * move-if-change: Don't output "$2 is unchanged"; suggested by Ben
+       Elliston.  Handle weird characters correctly.
+
 2005-08-30  Phil Edwards  <phil@codesourcery.com>
 
        * configure.in (*-*-vxworks*):  Add target-libstdc++-v3 to noconfigdirs.

diff --git a/move-if-change b/move-if-change
index d267e7212a825d18b4c1e9f7adb1d8f521efa25e..ff74a556d2d716f54d83511968988333bfc61f80 100755 (executable)
--- a/move-if-change
+++ b/move-if-change
@@ -1,32 +1,22 @@
 #!/bin/sh
+# Like mv $1 $2, but if the files are the same, just delete $1.
+# Status is zero if successful, nonzero otherwise.
 
-# Copyright (C) 1996 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 of the License, 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+usage="$0: usage: $0 SOURCE DEST"
 
-if
-test -r $2
-then
-if
-cmp $1 $2 > /dev/null
-then
-echo $2 is unchanged
-rm -f $1
-else
-mv -f $1 $2
-fi
+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