Question

Objective : Write a C Shell script which copies all files(*.java and *.class) from your home directory to a new one, and Analyze the new directory information such as number of files, user permissions, and disk usage. Sample Output:                                                    << CS Directory Analysis >>      Date:   ============================================================ Current Directory: /home/tomss New Directory Created : /home/tomss/pgm01 File information Total Number of files : 22 files Directory files:   0 files Plain text files:   10 files File have read permissions: 3 files File have write permissions: 4 files File have execute permissions : 2files File have length of zero : 0 files Others : 0 files Disk usage : 50 Kb Biggest 5 files in directory : 14.0 KB ./folder1/folder2/file 12.0 KB ./folder1/folder2/file2 etc ============================================================                                                                                        Reported by : <user>     Run C shell : -bash-4.2$ csh [tomss@csx8 ~]$ source .login %DirAnalyze.sh   pgm01

Notes. Change to C shell :   $ csh                                       %source .login Write a C shell script( csh ) named “DirAnalyze.sh” The script need to start with a line #! /bin/csh DirAnalyze.sh   put your name, section name and simple description for the assignment Print Title and date at the same line use echo command and cut command       << CS2351 Directory Analysis >>      Date: Tue Oct 29, 2018       Eg.          Wed Oct 30 17:48:15 CDT 2018 take --> Wed Oct 30, 2018 Display current directory Use the pwd command to make sure your home directory Create New Directory and copy files Create new directory with the mkdir command, directory name should be the first argument $1. * Command line argument are in special shell variables 0, 1, 2, 3 ,4 ...etc.    $0 is the name of the script itself, $1 the first, $2 the second ..etc. DirAnalyze.sh   pgm01   ------------------- ----------     $0                        $1 * Copy files copy *.java file in your $HOME directory to pgm01 copy *.class files in your $HOME directory to pgm01 cp $currentDir/*.java   $newDir cp $currentDir/*.class   $newDir change directory to pgm01 File information Use foreach loop and if statement foreach file (argument list)        if( -d $file) then         @ x ++ else if( -f $file    ) then     @ y ++ else if( -r $file   ) then               ……    else       ….    endif    end         # file inquiry Operator -d File is a Directory -e File Exists -f   File is a plain file -o user owns file -r user has read permission -x user has execute permission -z file has length of Zero Disk Usage Use du command      Find top 5 big files -print top 5 big file names and their size in decreasing order in human readable format(Hint : use “du” and “sort” and “head” commands together to achieve this) Run C shell            bash-4.2$ csh           [jongyk@csx8 ~]$ source .login           %DirAnalyze.sh pgm01 Examples vi DirAnalysis.sh #! /bin/csh       2 #Author : Jongyeop Kim       3 #Section: 401       4 #Description : put your description       5       6 echo -n "<< CS2351 Grade Report >> Date:" ;       7 echo `date |cut -c1-20` "\n"       8       9 ## set variables      10 set dirCount=0      11 set plainCount=0      12 set exePermission=0      13 set zeroLength=0      14      15 set currentDir=`pwd`      16 set newDir=$1      17      18 echo "A. Current Directory :" `pwd`      19 mkdir $newDir      20      21 echo "B. New Directory Created " `pwd`"/"$newDir      22 cp $currentDir/*.java $newDir      23 cp $currentDir/*.class $newDir      24      25 ## Change directory to pgm02      26      27 cd $newDir      28      29 ##count number file in your new Directory      30      31 foreach file (*)      32 ## echo $file      33   if( -x $file) then      34      echo "directory"      35      @ dirCount ++      36   else if( -f $file ) then      37     echo "plainCount"      38     @ plainCount ++      39   else      40     echo "zeroLength"      41     @ zeroLength=0      42   endif      43 end      44      45 echo "File is a directory" $dirCount      46 echo "File is a plain file" $plainCount      47 echo "File have length of zero” $zeroLength

Answer 1

#! /bin/csh
## set variables
set dirCount=0
set plainCount=0
set exePermission=0
set zeroLength=0
set readPermissions=0
set writePermissions=0
set totalFiles=0
set others=0
set diskUsage=0
set currentDir=`pwd`
set newDir=$1
echo "Current Directory :" `pwd` # Displays current directory
mkdir $newDir #create new directory
echo "New Directory Created " `pwd`"/"$newDir

## copy all .java files to new directory

cp $currentDir/*.java $newDir

## copy all .class files to new directory
cp $currentDir/*.class $newDir
## Change directory to the file name mentioned in command prompt
cd $newDir
echo "File information"
## count number of files in your new Directory
for file in $newDir; do # for every file in the new directory loop until you find 0 files
if( -e $file) then # if file exists then loop to find which file
@ totalFiles++ # increment total files
if( -d $file) then # if the file is directory file then increment dirCount
@ dirCount ++
else if( -f $file ) then # if file is plain text then increment plainCount
@ plainCount ++
else if( -r $file) then # if the current file has read permissions then increment readPermissions
@ readPermissions++
else if( -x $file) then # if the file has execute permissions then increment writePermissions
@ exePermission++
else if( -w $file) then   # if the file has write permissions then increment writePermissions
@ writePermissions++
else if( -z $file) then # if the file has zero length then increment zeroLength
@ zeroLength++
else
@ others++ # if the file is other than the above mentioned then increment others
fi # end if
fi # end if
end for # end for

## print the details
echo "Total number of files: " $totalFiles
echo "Directory files: " $dirCount
echo "Plain text files" $plainCount
echo "File have read permissions: " $readPermissions
echo "File have write permissions: " $writePermissions
echo "File have execute permissions: " $exePermission
echo "File have length of zero : " $zeroLength
echo "Others: " $others

## to get total disk size
echo "Disk Usage:" `du -sh`

## to get the top 5 largest files in storage
echo "Biggest 5 files in directory :" `du -h | sort -n -r | head -n 6`

exit 0

##

du command: Estimate file space usage.

h : Displays all files and folders in human readable format.

sort command : Sort lines of text files.

-n : Compare according to string numerical value.

-r : Reverse the result of comparisons.

head : Output the first part of files.

-n : Print the first ‘n’ lines. (In our case, We displayed first 6 lines, 6 because first line displays the total size then followed by the largest 5 files).