shell script

 1 ShowTab()
 2 {
 3     whitespace=""
 4     if [ $# -gt 0 ] && [ $1 -gt 0 ]; then
 5         for index in $(seq 1 $1)
 6         do
 7             whitespace="${whitespace}    "
 8         done
 9     fi
10     echo "${whitespace}"
11 }
12 
13 ShowDir()
14 {
15     #if [ $# == 0 ]; then
16     #    echo "no argument,exit!"
17     #elif [ ! -e $1 ]; then
18     #    echo "filepath $1 is invalid"
19     if [ -d $1 ]; then
20         echo "$(ShowTab $2)$1"
21         argLs=$(ls $1)
22         for filename in ${argLs}
23         do
24             ShowDir $1/${filename} $(($2+1))
25         done
26     elif [ -f $1 ]; then
27         echo "$(ShowTab $2)$1"
28     fi
29 }
30 
31 paramOne=""
32 if [ $# == 0 ] ; then
33     paramOne=$(pwd)
34 else
35     paramOne=$1
36 fi
37 
38 if [ ! -e ${paramOne} ]; then
39     echo "arg1: ${paramOne} is not exist"
40     exit 0
41 fi
42 
43 ShowDir ${paramOne} 0