In article <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] (Joey Hess) writes:
> I lookd at how smail currently does it: it uses the crontab command to add a
> crontab for the mail user. However, it doesn't check to see if the mail user
> already has a crontab. Seems very broken to me.
Try looking at how exim does it---it adds a crontab for the mail user, but
does correctly handle the mail user's existing crontab.
To install it does this:
# Install in crontab for user mail if not there
oldcrontab=$(crontab -u mail -l|tail +4)
if [ "$(echo "$oldcrontab"|grep exim)" == "" ]; then
cat <<EOM | crontab -u mail -
$oldcrontab
23 * * * * /usr/sbin/exim -q
EOM
fi
# Uncomment crontab entry if it's commented
crontab -u mail -l | tail +4 | sed 's/^#\(.*exim\)/\1/' \
| crontab -u mail -
On remove (prerm) it does:
# Comment out crontab entry
crontab -u mail -l | tail +4 | sed 's/^\(.*exim\)/#\1/' \
| crontab -u mail -
And on purge it does:
# Remove from mail user's crontab
crontab -u mail -l | tail +4 | grep -v exim | crontab -u mail -
The tail +4 in each case is to get rid of the header.
(By the way, I'd like to apologise for the ^Ms on the end of the lines of
this and other postings I've made to the debian lists. This is a bug in
knews which I'm in the middle of trying to fix. Obviously I'll file a bug
report with my patch when I've got it working).
.
