#!/bin/csh
## csh script: total
## --- compute total disk space in bytes for a directory hierarchy
## a recursive script

if ( $#argv == 1 && -d $1) then
   set x = `/bin/ls -l -d $1`
else
   echo usage : $0 directory; exit(1)
endif

set count = $x[5]   ## initialize byte count
foreach file ( $1/*  $1/.* )
   if ( -f $file ) then
      set x = `/bin/ls -l $file` 
      @ count = $count + $x[5]
   else if ( $file:t == "." ||  $file:t == ".." ) then
      continue
   else if ( -d $file ) then
      set y = `$0 $file`  ## recursive call
      @ count = $count + $y
   else
      echo $file not included in the total >>! /tmp/total.file
   endif
end
echo $count