backup

#! /bin/csh
#echo Start
set Total = 0
set BD = BackDir
#ls *~
if( ! -e $BD ) then
	mkdir $BD
endif
foreach i (`ls *~ *\#*`)
#    echo ============== Backing up $i

#Count the number of backups for this file
    set Total = `ls $BD/$i* | wc -l`
#    echo There are $Total

#Compare this backup to the last one in the directory.
#If different, copy this backup to the Backup Directory,
#increasing the number suffix.
#If there's no change, remove it.
    if( $Total == 0 ) then
	@ Total = $Total + 1
        echo Moving  $i
        mv $i $BD/$i"."$Total
    else
        if( `diff $i $BD/$i"."$Total |wc -l` != 0 ) then
            @ Total = $Total + 1
            echo Moving  $i
            mv $i $BD/$i"."$Total
        else
            echo removing $i  Backup exists.
            rm $i
        endif
   endif
end