How to loop inside the case ?

[kahpeng]

Is it possible to set a variable for a few lines of echo ?
After user enter a file name, the user will be asked to continue or not, if user press enter with no input which is * option in the case, i want the user be re-asked the same case menu which is

                echo "You just entered file name: [$filename]"
		echo "# Do you wish to enter another file name ?"
		echo ""
		echo "# Choices:-"
		echo "# ---------"
		echo "#    y/Y    -    Yes, I want to continue."
		echo "#    n/N    -    No, show me the last file name I entered!"
		echo -n "# Please enter your choice: "
		read choice

Any idea ?

Full Code

status=yes
while [ "$status" = yes ]
do
	echo -n "# Please enter file name: "
	read filename

	if [$filename = ""]
	then
		echo "# [Error] No Input!"
		echo "# Please run this script again."
		exit 1
	else
		echo "You just entered file name: [$filename]"
		echo "# Do you wish to enter another file name ?"
		echo ""
		echo "# Choices:-"
		echo "# ---------"
		echo "#    y/Y    -    Yes, I want to continue."
		echo "#    n/N    -    No, show me the last file name I entered!"
		echo -n "# Please enter your choice: "
		read choice 

		case $choice in
		y)	status=yes 
			;;
		n)	status=no
			echo ""
			echo "# Your last file name entered is : [$filename]" 
			;;
		Y)	status=yes 
			;;
		N)	status=no
			echo ""
			echo "# Your last file name entered is : [$filename]"
			;;
		*)	$repeat
			;;
		esac
		shift
	fi
done

[oz]

Is this homework/classwork?

[kahpeng]

hi there ozar, i'm just doing exercise, try 2 improve n learn more in linux programming. am i asking silly questions to you ?

[oz]

hi there ozar, i'm just doing exercise, try 2 improve n learn more in linux programming. am i asking silly questions to you ?

No, it's against the forum rules to post homework/classwork questions:

http://www.linuxforums.org/forum/lin...ums-rules.html

[kahpeng]

ozar, sorry about that, i don't know. even if i post the code and ask some comment from others also can't ? i need someone to correct if i do wrong, i want to learn >.<

[oz]

It's generally okay to post your code explaining what you've done to solve the problem yourself. People will often give clues and/or nudges to get you going.

It's not okay to post questions looking for specific answers to homework/classwork questions.

[kahpeng]

It's generally okay to post your code explaining what you've done to solve the problem yourself. People will often give clues and/or nudges to get you going.

It's not okay to post questions looking for specific answers to homework/classwork questions.

okay, I understand, maybe the way I post is not correct. So, this topic still consider "okay" or "not okay" ? Anyway, I changed my code while I was looking back at this topic, hope you don't close this topic as well. I added some error checking to my original code but need some advise to continue on.

Please do let me know if I can continue post my modified code in this topic, thanks for explaining about what the rules. Maybe my 1st post was confusing to you, I don't mean to ask for answer, I wanted to know if there's any other solution other than awk, I did reading sed stuff & etc, you might think I'm posting question for answers only, sorry about that

Cheers.

[oz]

Yeah, you'll probably be okay as long as you don't ask for specific answers, or expect someone to provide the solutions for you.

The forum rules are enforced at each moderator's discretion, so I can't speak for all mods.

Have fun with Linux, and good luck with your Linux course.

[radoulov]

Is it possible to set a variable for a few lines of echo ?
After user enter a file name, the user will be asked to continue or not, if user press enter with no input which is * option in the case, i want the user be re-asked the same case menu which is
[...]

May be something like this:

status=yes
while [ "$status" = yes ]
do
        [ "$invalid" ]||{ echo -n "# Please enter file name: "
        read filename;}

        if [ -z "$filename" ]
        then
                echo "# [Error] No Input!"
                echo "# Please run this script again."
                exit 1
        else
                [ "$invalid" ]||{
                echo "You just entered file name: [$filename]"
                echo "# Do you wish to enter another file name ?"
                echo ""
                echo "# Choices:-"
                echo "# ---------"
                echo "#    y/Y    -    Yes, I want to continue."
                echo "#    n/N    -    No, show me the last file name I entered!";}
                echo -n "# Please enter your choice: ";unset invalid
                read choice 

                case $choice in
                [Yy])   status=yes 
                        ;;
                [Nn])   status=no
                        echo ""
                        echo "# Your last file name entered is : [$filename]" 
                        ;;
                *)      echo "# You have to make a choice.";invalid=y
                        ;;
                esac
        fi
done

[kahpeng]

thanks radoulov, btw can i know -z purpose inside

 if [ -z "$filename" ]

the if statement ? Is it to check whether the variable is empty ?