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Full Discussion: Bash KeyPress (or Read Single Character)
Top Forums Shell Programming and Scripting Bash KeyPress (or Read Single Character) Post 302437177 by Ste_Moore01 on Wednesday 14th of July 2010 08:31:50 AM
Old 07-14-2010
Thanks Funksen, raw works for me too!

---------- Post updated at 01:31 PM ---------- Previous update was at 12:54 PM ----------

Sorry to bother you again.

When I tried this previously, I just had a standard read command.
So I would press the key and then press return and the command would be fired.

Now that have the below code instead, I can't seem to capture the keypresses correctly
Code:
	stty raw
	sel=`dd if=/dev/tty bs=1 count=1 2>/dev/null`
	stty -raw

I used to have
Code:
read sel

case $sel in
		1)  KEY=1 ; NUM=$sel
	;;
		2)  KEY=2 ; NUM=$sel
	;;
		3)  KEY=3 ; NUM=$sel
	;;
		4)  KEY=4 ; NUM=$sel
	;;
		5)  KEY=5 ; NUM=$sel
	;;
		6)  KEY="" ; QUIT="Y" 
	;;
		["Q","q"]) KEY="" ; QUIT="Y" 
	;;
		$'\e[A' ) 
		if [ $NUM -eq 1 ]
		then
			NUM=6
		else
			NUM=$(($NUM - 1)) 
		fi
	;;
		$'\e[B' ) 
		if [ $NUM -eq 6 ]
		then
			NUM=1
		else
			NUM=$(($NUM + 1)) 
		fi
	;;
		"") KEY=$NUM 
	;;
		*) echo "ERROR"
	;;
	esac

This would determine whether the user was pressing up and down, q, a number or just pressing enter.

Now when I use the same code it isn't recognising the up, down or enter keypresses.

Have you any idea what I should change to get it to work.

Just to clarify, my code looks like the following.
Code:
	echo -n "Choose one: " 
	stty raw
	sel=`dd if=/dev/tty bs=1 count=1 2>/dev/null`
	stty -raw
		
	case $sel in
		1)  KEY=1 ; NUM=$sel
	;;
		2)  KEY=2 ; NUM=$sel
	;;
		3)  KEY=3 ; NUM=$sel
	;;
		4)  KEY=4 ; NUM=$sel
	;;
		5)  KEY=5 ; NUM=$sel
	;;
		6)  KEY="" ; QUIT="Y" 
	;;
		["Q","q"]) KEY="" ; QUIT="Y" 
	;;
		$'\e[A' ) 
		if [ $NUM -eq 1 ]
		then
			NUM=6
		else
			NUM=$(($NUM - 1)) 
		fi
	;;
		$'\e[B' ) 
		if [ $NUM -eq 6 ]
		then
			NUM=1
		else
			NUM=$(($NUM + 1)) 
		fi
	;;
		"") KEY=$NUM 
	;;
		*) echo "ERROR"
	;;
	esac

Any suggestions would be much appreciated.
 

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