Shell Programming and Scripting

Hi all!
I wirte a little Shell Script, that kill pids by programm names. For example, when i want to kill any pid of xmms i use this command:

kill -9 `ps -A | awk ' ($4=="xmms") {print $1}'`

To put this in a "killprg" script i use the following linkes:

#!/bin/bash
echo ""
echo "Programm to kill?"
echo ">>>>"
read prg
echo "Quit Programm -> $prg <- "
kill -9 `ps -A | awk ' ($4=="$prg") {print $1}'`

-----------
But i alway get the output:
kill: usage: kill [-s sigspec | -n signum | -sigspec] [pid | job]... or kill -l [sigspec]
I think he cannot set the variable ($4=="$prg") ??!!

Does anyone have an idea?
Thank you!

I think you could look at it a slightly different way:

Code:

#!/bin/bash
echo ""
echo "Programm to kill?"
echo ">>>>"
read prg
echo "Quit Programm -> $prg <- "
ps -A | grep "$prg" | kill -9 `awk '{print $1}'`

OK! That was easy! Thank you