Shell Programming and Scripting

Code:

displaydir()
(
  [ -d "$1" ] && cd "$1" || return 1
  w=$(( $COLUMNS / 4  ))
  n=3
  em='\e[31m'
  no='\e[0m'
  for file in *
  do
    n=$(( ($n + 1) % 4 ))
    [ $n -gt 0 ] && printf "\e[$(( $n * $w ))C\e[D "
    if [ -d "$file" ]
    then
       printf "$em%-$w.${w}s$no\r" "$file"
    else
       printf "%-$w.${w}s\r" "$file"
    fi
    [ $n -eq 3 ] && echo
  done
)

"Pretty much the same" doesn't tell us anything. If you are still having problems, post the exact code you are now using and explain exactly what is going wrong and what you expect to happen.

Code:

#!/bin/bash

#descend/display/ignore the contents of a chosen directory



#displays the contents of a passed directory parameters in four column format and highlights sub-directories


displaydir()

(
	
	[ -d "$1" ] && cd "$1" || return 1

	w=15

	n=3

	em='\e[31m'

	no='\e[0m'

	for file in *

	do

		n=$(( ($n + 1) % 4 ))

		[ $n -gt 0 ] && printf "\e[$(( $n * $w ))C\e[D "

		if [ -d "$file" ]

		then

			printf "$em%-$w.${w}s$no\r" "$file"

		else

			printf "%-$w.${w}s\r" "$file"

		fi

		[ $n -eq 3 ] && echo

	done

)



#filters through the contents of the passed directory parameter and asks whether to descend into the directory

#(which in turn recalls the function), list the contents of the directory (calls the display function), or just 

#ignore the directory and move onto the next.


descenddir()

(

	local BASEDIR="$1"

	local LOCALDIR="$PWD"



	echo "The present working directory is: $BASEDIR "

	cd "$BASEDIR" || return 1

	echo "Do you want to display the contents of this directory (Y, N)?"

	read answer

	case $answer in

		[yY]) displaydir "$BASEDIR";;

	esac


	for file in *

	do

		if [ -d $file ] 

		then

			echo "Found directory $file; do you want to Descend, List or Ignore (D,L, I): "

			read answer

			case $answer in

				[dD]) descenddir "$BASEDIR/$file/";;

				[lL]) displaydir "$BASEDIR/$file/";;

				[iI]) echo "The directory was ignored" ;;

			esac
 
		fi

	done

	cd "$LOCALDIR" || return 1

)



#goes through all passed directory parameters and calls the descend function. If no parameters use PWD.

if [ $# -gt 0 ] 

   then 

	for dir

	do

		descenddir "$dir"

	done 

   else 

	descenddir "$PWD"

fi