examples/scripts.v2/lowercase

   1 #! /bin/bash
   2 #
   3 # original from
   4 # @(#) lowercase.ksh 1.0 92/10/08
   5 # 92/10/08 john h. dubois iii (john@armory.com)
   6 #
   7 # conversion to bash v2 syntax done by Chet Ramey
   8
   9 Usage="Usage: $name file ..."
  10 phelp()
  11 {
  12 echo "$name: change filenames to lower case.
  13 $Usage
  14 Each file is moved to a name with the same directory component, if any,
  15 and with a filename component that is the same as the original but with
  16 any upper case letters changed to lower case."
  17 }
  18
  19 name=${0##*/}
  20
  21 while getopts "h" opt; do
  22         case "$opt" in
  23         h)      phelp; exit 0;;
  24         *)      echo "$Usage" 1>&2; exit 2;;
  25         esac
  26 done
  27
  28 shift $((OPTIND - 1))
  29
  30 for file; do
  31     filename=${file##*/}
  32     case "$file" in
  33     */*)    dirname=${file%/*} ;;
  34     *)    dirname=. ;;
  35     esac
  36     nf=$(echo $filename | tr A-Z a-z)
  37     newname="${dirname}/${nf}"
  38     if [ "$nf" != "$filename" ]; then
  39         mv "$file" "$newname"
  40         echo "$0: $file -> $newname"
  41     else
  42         echo "$0: $file not changed."
  43     fi
  44 done