X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=move-if-change;fp=move-if-change;h=ff74a556d2d716f54d83511968988333bfc61f80;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=ee1b348beebd9d85ffc66a39d5c4c8940ca45897;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git

diff --git a/move-if-change b/move-if-change
index ee1b348b..ff74a556 100755
--- 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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