Lab 9-10 Shell Script Assignment and Solution

Lab 9-10 Shell Script Requirement

Lab 9-10 Shell Script Solution

** Module 9 - Script in Korn Shell **

#!/bin/ksh

# Name: ABC, Lab9

# Module 9

# 1. Accept exactly 1 command line argument, or print a Usage message and exit with error code 1

if (( $# != 1 ))

then

echo "Incorrect argument - Usage: ./lab9 testDirectory"

exit 1

fi

dirName=$1

absdirName=`readlink -f "$dirName"`

#echo "Given directory path as an argument" $dirName

#echo "Absolute path of entered directory" $absdirName # readlink provides absolute path

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

# Function 1: 2. Call a function that checks for a valid directory. A valid directory is a user’s home directory or any of its subdirectories, so here are all the conditions to check: o it must be a directory o it must be a user’s home directory or any of the subdirectories below  - When either of these conditions is not met, print a separate error message and exit with error code 1

validDirectory( )

{

if [ ! -e "$dirName" ]

then

echo "Directory does not exist"

exit 1

fi

if [ ! -d "$dirName" ]

then

echo "Invalid Directory"

exit 1

fi

typeset validDir1="/home/student/"`whoami` # typeset  -- local variable --> local keyword in bash

typeset validDir2="/home/staff/"`whoami`

#echo "Dir1: " $validDir1 " Dir2: " $validDir2

#For this lab, a user’s home directory is in either /home/student/ or /home/staff/. The user may not always enter an absolute path (such as /home/etc), and instead enters a relative path (such as module9 or ../..). You must be able to catch the case when the user is at the home directory, but entered .. ,   which means the given directory is above the home directory and is an error. On the other hand, if the user is at the home directory and enters . (for the current directory), then it is a valid directory.

if [ `echo "$absdirName" | grep -c "$validDir1"` -gt 0 ] # make grep output quite (no message) and silent (no error display) 

then

echo -n "" #echo "Valid directory - Student"

elif [ `echo "$absdirName" | grep -c "$validDir2"` -gt 0 ]

then

echo -n "" #echo "Valid directory - Staff"

else

echo "can only search at your home directory"

exit 1

fi

}

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

# Function 2: Print Result

printResult( )

{

echo "Found " $bashFilesIndex " bash script files in " $dirName

trap '' INT # ignore control-c

typeset tmpcounter=0

for bashFile in ${bashFiles[@]}

do

(( tmpcounter=tmpcounter+1 ))

echo $bashFile

if (( $tmpcounter==5 ))

then

sleep 3

tmpcounter=0

fi

done

trap - INT # signal handling is reset to default   --> syntax for ksh shell is different than bash shell

}

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

# Main Function #

validDirectory # Function 1 Call

typeset bashFilesIndex=0

allFiles=`find "$dirName" -type f`

#echo ${allFiles[@]}

for file in ${allFiles[@]}

do

line1=`head -1 "$file"`

#echo "File: " $file "Line1: " $line1

if [[ ! -z $line1 ]]

then

if [[ $line1 == "#!/bin/bash" ]]

then

#echo "Match: " $line1

bashFiles[$bashFilesIndex]=$file

(( bashFilesIndex=$bashFilesIndex+1 ))

fi

fi

done

#echo ${bashFiles[@]}

printResult # Function 2 call to display result

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

** Module 10 - Script in C Shell **

#!/bin/tcsh

# Name: ABC, Lab10

# Module 10

# 1. Accept exactly 1 command line argument, or print a Usage message and exit with error code 1

if (( $# != 1 )) then

echo "Incorrect argument - Usage: ./lab10 testDirectory"

exit 1

endif

set dirName = "$1"

set absdirName = `readlink -f "$dirName"`

#echo "Given directory path as an argument" $dirName

#echo "Absolute path of entered directory" $absdirName # readlink provides absolute path

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

# Main Function #

# validDirectory # Function 1 Call

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

# Copied Function 1 into main for tcsh and modified: 2. Call a function that checks for a valid directory. A valid directory is a user’s home directory or any of its subdirectories, so here are all the conditions to check: o it must be a directory o it must be a user’s home directory or any of the subdirectories below  - When either of these conditions is not met, print a separate error message and exit with error code 1

if ( ! -e "$dirName" ) then

echo "Directory does not exist"

exit 1

endif

if ( ! -d "$dirName" ) then

echo "Invalid Directory"

exit 1

endif

set validDir1="/home/student/"`whoami` # typeset  -- local variable --> local keyword in bash

set validDir2="/home/staff/"`whoami`

#echo "Dir1: " $validDir1 " Dir2: " $validDir2

#For this lab, a user’s home directory is in either /home/student/ or /home/staff/. The user may not always enter an absolute path (such as /home/etc), and instead enters a relative path (such as module9 or ../..). You must be able to catch the case when the user is at the home directory, but entered .. ,   which means the given directory is above the home directory and is an error. On the other hand, if the user is at the home directory and enters . (for the current directory), then it is a valid directory.

if { ( echo "$absdirName" | grep -c "$validDir1" > /dev/null ) } then # make grep output quite (no message) and silent (no error display) 

echo -n "" #echo "Valid directory - Student"

else if { ( echo "$absdirName" | grep -c "$validDir2" > /dev/null ) } then

echo -n "" #echo "Valid directory - Staff"

else

echo "can only search at your home directory"

exit 1

endif

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

@ bashFilesIndex = 0

set allFiles = `find "$dirName" -type f`

set bashFiles = 

#echo ${allFiles[*]} # instead of @ changed to * (list) for tcsh

foreach tmpfile ($allFiles) # changed from for to foreach .. end instead of no do...done

set line1 = `head -1 "$tmpfile"`

#echo "File: " $tmpfile "Line1: " $line1

# echo $?line1 # check varible is set or not

if ( ${%line1} != 0 ) then # if ( ! -z "$line1" ) then

if ( "$line1" == "#\!/bin/bash" ) then

#echo "Match: " $line1

@ bashFilesIndex = $bashFilesIndex + 1

#set bashFiles[$bashFilesIndex]=$tmpfile

set bashFiles = ( $bashFiles $tmpfile )

endif

endif

end

#echo ${bashFiles[*]} # instead of @ changed to * (list) for tcsh

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

# Copied Function 2: Print Result here for tcsh script

echo "Found " $bashFilesIndex " bash script files in " $dirName

onintr - #trap '' INT # ignore control-c

@ tmpcounter = 0

foreach bashFile ($bashFiles) #for bashFile in ${bashFiles[@]}

@ tmpcounter = $tmpcounter + 1

echo $bashFile

if ( $tmpcounter == 5 ) then

sleep 3

@ tmpcounter = 0

endif

end

onintr #trap - INT # signal handling is reset to default   --> syntax for ksh shell is different than bash shell

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