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If-statement nested in case

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# 1  
Old 08-05-2010
If-statement nested in case
I'm trying to write case statements with 'if statements' embedded inside of them. I'm using the korn shell but it's not functioning.

If I want to see if a string exists in a file and then perform an action, what would be the best way to do this?

For file "asg51fin" to delete a line if a user input is matched:
Code:
Smith:Joseph:joe:12365

User searches "smith" and "smith is deleted. If name is search that doesn't exist then "sorry, no match found" is displayed.

Here's the code I'm using:
Code:
echo  "Please make a decision: \c"
read choice

case "$choice" in
[!AaDdMmIiXxVv]) echo "invalid entry, please try again";sleep 2;;
[Aa]) echo "Please enter the last name"; read last;
 echo "Please enter the first name";read first;
 echo "Please enter a nickname"; read nick;
 echo "Please enter a phone number in the following format: xxx-xxx-xxxx";
 read phone;echo "$last:$first:$nick:$phone" >> asg51fin;;

[Dd]) echo "Please enter the last name of the entry you want to remove"
read delete
if [ 'egrep "$delete" asg51fin' ]
then set -- 'grep "^$delete" >> asg51fin' && echo "$delete deleted" && sleep 2
else echo "Sorry, no match found for $delete" && sleep 2
fi;;

#Thanks so much for reading
Last edited by dazeman27; 08-05-2010 at 09:58 PM.. Reason: Please use code tags
# 2  
Old 08-06-2010
An if block will work just fine in a case statement as long as you make sure you have it formatted correctly. I did a little revamping of your code
and it executes fine.

Code:
#!/bin/ksh
#set -x
read choice?"Please make a decision: "
 
case "$choice" in
[!AaDdMmIiXxVv]) echo "invalid entry, please try again"
                         sleep 2
                         ;;
                 [Aa]) read last?"Please enter the last name: "
                         read first?"Please enter the first name: "
                         read nick?"Please enter a nickname: "
                         read phone?"Please enter a phone number in the
                                          following format: xxx-xxx-xxxx: "
                         echo "$last:$first:$nick:$phone" >> asg51fin
                         ;;
                 [Dd]) read delete?"Please enter the last name of the entry
                                          you want to remove: "
                         if [ `grep "^$delete" asg51fin` ]; then
                             echo `grep "^$delete" asg51fin`
                             echo "$delete deleted"
                             sleep 2
                         else
                             echo "Sorry, no match found for $delete"
                             sleep 2
                         fi
                         ;;
esac

If I were you I would use the sed command to remove the line from the file since your grep is finding the whole string. Either that or use awk where you can use $ format to find specific fields.
Last edited by port43; 08-06-2010 at 03:50 AM..
This User Gave Thanks to port43 For This Post:
dazeman27
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