Shell Script - Contents of Directories

Script : Displaying the Contents of Directories

Script Name: formatdir.sh

Script Function: It generates a multi column listing of files and directories, showing files with their sizes and directories with the number of files they contain.
Eg:
# ./formatdir.sh
calculator.sh (4KB)|
formatdir.sh (4KB)|
mongo (5 entries)|
scripts (74 entries)|
server_t (11 entries)|

Script Usage: ./formatdir.sh < directory path >

Code:

#!/bin/bash

# formatdir–Outputs a directory listing in a friendly and useful format

# Note that you need to ensure “scriptbc” (Script #9) is in your current path

# because it’s invoked within the script more than once.

#scriptbc=$(which scriptbc)

# Function to format sizes in KB to KB, MB, or GB for more readable output

scriptbc(){

if [“$1” = “-p” ] ; then

precision=$2

shift 2

else

        precision=2 # Default

fi

bc -q -l << EOF

scale=$precision

$*

quit

EOF

}

readablesize()

{

if [ $1 -ge 1048576 ] ; then

echo “$($scriptbc -p 2 $1 / 1048576)GB”

elif [ $1 -ge 1024 ] ; then

echo “$($scriptbc -p 2 $1 / 1024)MB”

else

echo “${1}KB”

fi

}

#################

## MAIN CODE

if [ $# -gt 1 ] ; then

echo “Usage: $0 [dirname]” >&2

exit 1

elif [ $# -eq 1 ] ; then # Specified a directory other than the current one?

        cd “$@” # Then let’s change to that one.

        if [ $? -ne 0 ] ; then # Or quit if the directory doesn’t exist.

                exit 1

        fi

fi

for file in *

do

        if [ -d “$file” ] ; then

                size=$(ls “$file” | wc -l | sed ‘s/[^[:digit:]]//g’)

                if [ $size -eq 1 ] ; then

                        echo “$file ($size entry)|”

                else

                        echo “$file ($size entries)|”

                fi

        else

                size=“$(ls -sk “$file” | awk ‘{print $1}’)”

                echo “$file ($(readablesize $size))|”

        fi

done

sed ‘s/ /^^^/g’ |xargs -n 2 |sed ‘s/\^\^\^/ /g’ |awk -F\| ‘{ printf “%-39s %-39s\n”, $1, $2 }’

exit 0