examples/functions/ksh-cd

   1 #
   2 # ksh-like `cd': cd [-LP] [dir [change]]
   3 #
   4 cd()
   5 {
   6         OPTIND=1
   7         while getopts "LP" opt
   8         do
   9                 case $opt in
  10                 L|P)    CDOPTS="$CDOPTS -$opt" ;;
  11                 *)      echo "$FUNCNAME: usage: $FUNCNAME [-LP] [dir] [change]" >&2
  12                         return 2;;
  13                 esac
  14         done
  15
  16         shift $(( $OPTIND - 1 ))
  17
  18         case $# in
  19         0)      builtin cd $CDOPTS "$HOME" ;;
  20         1)      builtin cd $CDOPTS "$@" ;;
  21         2)      old="$1" new="$2"
  22                 case "$PWD" in
  23                 *$old*) ;;
  24                 *)       echo "${0##*/}: $FUNCNAME: bad substitution" >&2 ; return 1 ;;
  25                 esac
  26
  27                 dir=${PWD//$old/$new}
  28
  29                 builtin cd $CDOPTS "$dir" && echo "$PWD"
  30
  31                 ;;
  32         *)      echo "${0##*/}: $FUNCNAME: usage: $FUNCNAME [-LP] [dir] [change]" >&2
  33                 return 2 ;;
  34         esac
  35 }