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Write a regular expression which catches user $HOME in shellscripting

-1

I'd like to write a regex in shellscript which would compare the user input path to user$HOME. Then it would raise an error in case the user input path contains the user $HOME. The home folder normally starts with /ort/home but /ort part is not a must. When I run it always gives a valid path although I clearly enter an invalid path. What am I doing wrong? Thanks. Please refer following link[1] if necessary to see how regex are used in shellscript

My attempt is as follows

#!/bin/bash



function user_input () {



        read -p "Type the path for project1:" user_path



        string1="${HOME}"

        echo "$string1"



        if [ "$user_path" = "$string1 | /ort/home/+.* |  .*+/home/+.*"  ]; then 

             echo "Not a valid path, contains $HOME directory"        

        else

             echo "valid path"

        fi

}



function main() {



user_input

}



main

Terminal output

Please note first entry is a valid path and other two are invalid paths.

jenny@server32:~$ ./test.sh 

Type the path for project1:/scratch/random

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home/j/jen

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home

/ort/home/j/jen

valid path

[1]https://stackoverflow.com/questions/2237080/how-to-compare-strings-in-bash

command-line bash scripts regex

share

asked 6 mins ago

JennyJenny

845

add a comment | 

-1

I'd like to write a regex in shellscript which would compare the user input path to user$HOME. Then it would raise an error in case the user input path contains the user $HOME. The home folder normally starts with /ort/home but /ort part is not a must. When I run it always gives a valid path although I clearly enter an invalid path. What am I doing wrong? Thanks. Please refer following link[1] if necessary to see how regex are used in shellscript

My attempt is as follows

#!/bin/bash



function user_input () {



        read -p "Type the path for project1:" user_path



        string1="${HOME}"

        echo "$string1"



        if [ "$user_path" = "$string1 | /ort/home/+.* |  .*+/home/+.*"  ]; then 

             echo "Not a valid path, contains $HOME directory"        

        else

             echo "valid path"

        fi

}



function main() {



user_input

}



main

Terminal output

Please note first entry is a valid path and other two are invalid paths.

jenny@server32:~$ ./test.sh 

Type the path for project1:/scratch/random

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home/j/jen

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home

/ort/home/j/jen

valid path

[1]https://stackoverflow.com/questions/2237080/how-to-compare-strings-in-bash

command-line bash scripts regex

share

asked 6 mins ago

JennyJenny

845

add a comment | 

I'd like to write a regex in shellscript which would compare the user input path to user$HOME. Then it would raise an error in case the user input path contains the user $HOME. The home folder normally starts with /ort/home but /ort part is not a must. When I run it always gives a valid path although I clearly enter an invalid path. What am I doing wrong? Thanks. Please refer following link[1] if necessary to see how regex are used in shellscript

My attempt is as follows

#!/bin/bash



function user_input () {



        read -p "Type the path for project1:" user_path



        string1="${HOME}"

        echo "$string1"



        if [ "$user_path" = "$string1 | /ort/home/+.* |  .*+/home/+.*"  ]; then 

             echo "Not a valid path, contains $HOME directory"        

        else

             echo "valid path"

        fi

}



function main() {



user_input

}



main

Terminal output

Please note first entry is a valid path and other two are invalid paths.

jenny@server32:~$ ./test.sh 

Type the path for project1:/scratch/random

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home/j/jen

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home

/ort/home/j/jen

valid path

[1]https://stackoverflow.com/questions/2237080/how-to-compare-strings-in-bash

command-line bash scripts regex

share

asked 6 mins ago

JennyJenny

845

#!/bin/bash



function user_input () {



        read -p "Type the path for project1:" user_path



        string1="${HOME}"

        echo "$string1"



        if [ "$user_path" = "$string1 | /ort/home/+.* |  .*+/home/+.*"  ]; then 

             echo "Not a valid path, contains $HOME directory"        

        else

             echo "valid path"

        fi

}



function main() {



user_input

}



main

jenny@server32:~$ ./test.sh 

Type the path for project1:/scratch/random

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home/j/jen

/ort/home/j/jen

valid path



jenny@server32:~$ ./test.sh 

Type the path for project1:/ort/home

/ort/home/j/jen

valid path

share

asked 6 mins ago

JennyJenny

845

share

asked 6 mins ago

JennyJenny

845

asked 6 mins ago

JennyJenny

845

asked 6 mins ago

JennyJenny

845