Shell-script question

[Andre Berger <uzscd5@uni-bonn.de>]

I wrote a shell script "/usr/local/bin/mailcheck" (/usr/local/bin/ is in
$PATH of my potato bash) that gives a list of pon "targets" (diff.
ISPs), and is owned by root., perms 755. I've virtually no experience
with shell scripting, so it may be poor quality. Anyway: If the script
is invoked from a command line within or outside X, it works.  If it's
invoked via "rxvt -e mailcheck" or "rxvt -ls -e mailcheck", everything
looks normal, but nothing's dialed. 

Andre Berger                                [andre.berger@topmail.de]


#!/bin/sh
# /usr/local/bin/mailcheck
# Auswahldialog fuer Nur-Mailcheck-PPP-Verbindungen

isplist="/tmp/isplist"
rm $isplist 2> /dev/null

providerlist=$(ls /etc/ppp/peers/ | grep -v bak | grep -v \~)

dialogtext="Email checken und Verbindung BEENDEN"

isp=
j="1"

while [ -z "$isp" ]; do
	echo -e "$dialogtext:\n"
	for i in $providerlist; do
		echo "["$j"]" $i
		echo "["$j"]" $i >> $isplist
		j=$[$j+1]
	done 
	echo -e "\n[0] Abbrechen\n"
	echo -n "Auswahl: "
	read isp
	isp=${isp##[^0-9]*}
	if [ "$isp" = "0" ]; then
		rm $isplist 2> /dev/null
		echo "Abgebrochen." 
		exit 1
	else
		if [ -z "$isp" ]; then
			echo "Unbekannt, bitte Eingabe wiederholen"
		fi
	fi
	sleep 1
done

dialisp=$(cat $isplist | grep "["$isp"]" | mawk '{print $2}')
rm $isplist 2> /dev/null

echo -e -n "[$isp] $dialisp...\n"
sleep 1

touch $HOME/NURMAIL
exec pon $dialisp