Free space from all devices

frees.sh

#!/bin/bash

fecho() {
  local c
  c=`perl -e "print ' ' x(15-${#1}) ; print $1"`
  c=`echo "$c" | sed "s/\([^.]\{3\}\)/\1./g;s/\.\$//"`
  echo -n "${c// ./  }"
}

tprint() {
  echo "        ttt.ggg.mmm.kkk.bbb"
  echo "total:  ""`fecho $1`"
  echo "used:   ""`fecho $2`"
  echo "_free:  ""`fecho $4`"
  echo "free:   ""`fecho $3`"
  echo "lost:   ""`fecho $5`"
}


z=`( IFS=$'\n'
  for f in \`df -PB1 2> /dev/null | grep ^/dev/ | grep -v /tmp | grep -v cdrom |
    sed "s/[^ ]* *\([^ ]*\) *\([^ ]*\) *\([^ ]*\).*/\1 \2 \3/"\` ; do
      echo t=t+${f%% *}
      f=${f#* }
      echo u=u+${f%% *}
      echo a=a+${f##* }
  done
  echo a2=t-u
  echo l=a2-a
  echo $'print t," ",u," ",a," ",a2," ",l\nquit'
) | bc -q`

tprint $z