Re: use and abuse of debconf

[Stefan Hornburg <racke@linuxia.de>]

Joey Hess <joeyh@debian.org> writes:


[...]

> 
> Each time the package is upgraded or dpkg-reconfigured, /etc/foo is
> wiped out. Any changes the admin may have made are destroyed.
> 
> Now an example of a package that does it right. Its config script:
> 
> #!/bin/sh -e
> . /usr/share/debconf/confmodule
> if [ -e /etc/foo ]; then
> 	. /etc/foo || true
> 	if [ "$QUESTION" ]; then
> 		db_set foo/question $QUESTION
> 	fi
> fi
> db_input medium foo/question || true
> db_go || true

For multiple variables I'm using the following:

if [ -e /etc/iptables/init.cfg ]; then
	# Read current state from configuration file
	. /etc/iptables/init.cfg || true
    for token in BACKDOOR ICMPDIAG IFOUT DMZ IPOUT LOCALIFS LOCALNET LOGNETBIOS MODENAME PASSOUT REJECTLOCAL SERVICES SERVICES_UNCOMMON; do 
		tokvar=`echo '$'$token`
		tokval=`eval echo $tokvar`
		if [ "$tokval" ]; then
			db_set iptables/`echo $token | tr [A-Z] [a-z]` $tokval
		fi
    done
fi

Any comments ?

Bye
        Racke

-- 
LinuXia Systems && Cobolt NetServices, eCommerce and more
Shop- und Datenbanklösungen mit MiniVend, Firewalls auf Debian-Basis
http://www.linuxia.de - http://www.cobolt.net
--> Junior Officer of the MiniVend/Interchange Bug Patrol <---