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POif statement issue and grep issue in shell script of unix??
 

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    <p>Why is it that in my script, there are no outputs when I run it? What is the problem in my if and grep ?? Thank you.</p> <p>Here is my script,</p> <pre><code>userfile=~/casestudies/login_users clear echo " Password Recovery " echo "=============================" echo "Username: " ; read user cuser=`grep $user $login_users | cut -d':' -f1` if [ "$cuser" = "$user" ] then echo "Then choose a question to answer below" echo "(A) What is your 5th favorite color? " echo "(B) What is your favorite food? " echo "(C) What is the name of your pet? " echo "(D) What is the middle name of your mother's maiden name? " echo "(E) What is the model number of your laptop/monitor? " echo "choice : " else echo "Invalid choice. Choose another." fi read question || continue case $question in [Aa]) echo "answer in question A: " ; read A if [[ "$A" == $(grep $A userfile | tr ':' ' ') ]] #A is the answer of the user in question A, it is stored in the login_users then echo "Correct, your password is: " echo grep $passwd $userfile | tr ':' ' ' #passwd is the original password of the user, it is stored in login_users else echo "Incorrect. Choose another question to answer." ; fi ;; [Bb]) echo "answer in question B: " ; read B if [[ "$B" == $(grep $B userfile | tr ':' ' ') ]] #B is the answer of the user in question A, it is stored in the login_users then echo "Correct, your password is: " echo grep $passwd $userfile | tr ':' ' ' #passwd is the original password of the user, it is stored in login_users else echo "Incorrect. Choose another question to answer." ; fi ;; [Cc]) echo "answer in question C: " ; read C if [[ "$C"== $(grep $C userfile | tr ':' ' ') ]] #C is the answer of the user in question A, it is stored in the login_users then echo "Correct, your password is: " echo grep $passwd $userfile | tr ':' ' ' #passwd is the original password of the user, it is stored in login_users else echo "Incorrect. Choose another question to answer." ; fi ;; [Dd]) echo "answer in question D: " ; read D if [[ "$D"== $(grep $D userfile | tr ':' ' ') ]] #D is the answer of the user in question A, it is stored in the login_users then echo "Correct, your password is: " echo grep $passwd $userfile | tr ':' ' ' #passwd is the original password of the user, it is stored in login_users else echo "Incorrect. Choose another question to answer." ; fi ;; [Ee]) echo "answer in question E: " ; read E if [[ "$E"== $(grep $E userfile | tr ':' ' ') ]] #E is the answer of the user in question A, it is stored in the login_users then echo "Correct, your password is: " echo grep $passwd $userfile | tr ':' ' ' #passwd is the original password of the user, it is stored in login_users else echo "Incorrect. Choose another question to answer." ; fi ;; esac </code></pre>
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    1. USSam
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    1. COIn case you're wondering why your question's formatting was wonky, please read http://stackoverflow.com/editing-help.
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      1. USMatt Ball
    2. COIt is still wonky. The first lines aren't indented.
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    3. CO@chen: Without trying to debug you code, my guess is that you're never getting to the grep. Did you try turning on the debug features of your shell? `set -vx` either at the top of the script, or just before the grep you want to check should help. You should see your grep line being executed with a `+` at the front. Good luck.
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      1. USshellter
 

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