Hello all,
I have to move a config file, and I am not sure of the best way of
handling it, so I wanted to ask for opinions.
The problem is that I am currently shipping an /etc/default/$package,
which needs to now become /etc/$package.conf - it's not a shell script,
but more of a hacked together config file. What I want to do is ensure
that any user changes to the old /etc/default/$package file get
seemlessly merged into /etc/$package.conf, but not mess up any user made
up $package.conf
Does the following postinst snippet do it, or should I let standard dpkg
config file handling take care of it, or does anyone have other
suggestions?
# HDPARM_OLD is the md5sum of the unmodified file
HDPARM_MD5=`md5sum /etc/default/hdparm | awk '{print $1}'`
HDPARM_CONF=`md5sum /etc/hdparm.conf | awk '{print $1}'`
HDPARM_OLD="9578464c1ae847fc33d58e049f8c08fc"
if [ -f /etc/hdparm.conf ]; then
if [ ! $HDPARM_CONF = $HDPARM_OLD ]; then
echo -n "Backing up old hdparm.conf . . "
mv /etc/hdparm.conf /etc/hdparm.conf.dpkg-old
echo "done"
fi
fi
if [ -f /etc/default/hdparm ]; then
if [ $HDPARM_MD5 = $HDPARM_OLD ]; then
# New basic default config file already added, just remove cruft
rm /etc/default/hdparm
else
echo -n "Moving /etc/default/hdparm to /etc/hdparm.conf . . "
mv /etc/default/hdparm /etc/hdparm.conf
echo "done"
fi
fi
There is also a note in README.Debian that the config file location has
changed. The problem I see with the above is that by the time postinst
runs, there will already be /etc/hdparm.conf, as it is shipped in the
package. So I see the flow of logic as, if /etc/hdparm.conf exists, and
is changed (most likely the user has made their own), then back up
theirs - if it is the same as the shipped, do nothing. If the old
config file exists, but is unchanged, remove it - they now have the new
config file. If it is changed, mv it to the new location.
Thanks for any comments,
--
-----------------------------------------------------------------
| ,''`. Stephen Gran |
| : :' : sgran@debian.org |
| `. `' Debian user, admin, and developer |
| `- http://www.debian.org |
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