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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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RUSHLAST(1)							      Gnurush							       RUSHLAST(1)

NAME

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SYNOPSIS

       rushlast [-F STRING] [-f DIR] [-n NUM] [--forward] [-H]

       rushlast {-v | -h | --usage}

DESCRIPTION

       rushlast is a utility to search backwards in the session history that GNU rush maintains about all users calling on its services.

OPTIONS

       -F STRING | --format=STRING
	      Use specified format string instead of the default string.

       -f DIR | --file=DIR
	      Use database directory DIR. Default location is /var/lib/rush.

       --forward
	      Display entries in chronological instead of reverse time order.  The latter is the default mode of operation.

       -n NUM | --count=NUM | -NUM
	      Show at most NUM records. The numerical form '-NUM' is to provide compatibility with the standard utility last(1).

       -H | --no-header
	      Suppress the header line in printout.

       -v | --version
	      Display program version.

       -h | --help
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       --usage
	      Display a concise usage summary.

SEE ALSO

       The  full  documentation for rushlast is maintained as a Texinfo manual. If the info and rush programs are properly installed at your site,
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	      info rush

       should give you access to the complete manual.

       See also rush(8) and rushwho(1).

AUTHOR

       This text was written by Mats Erik Andersson for the Debian project, since the original source supplies a documentation only in the form of
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GNU Rush 1.7							   December 2010						       RUSHLAST(1)
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