postinst is in dnscache-run 1:1.05-8ubuntu1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #!/bin/sh
set -e
test "$1" = 'configure' || exit 0
if test ! -r /etc/sv/dnscache/seed; then
rm -rf /etc/sv/dnscache/.'{tmp}'.$$
dnscache-conf Gdnscache Gdnslog /etc/sv/dnscache/.'{tmp}'.$$
mv /etc/sv/dnscache/.'{tmp}'.$$/seed /etc/sv/dnscache/seed
rm -rf /etc/sv/dnscache/.'{tmp}'.$$
fi
if test -e /etc/service/dnscache; then
echo 'Restarting dnscache service...'
svc -t /etc/service/dnscache || :
else
update-service --add /etc/sv/dnscache
fi
test -z "$2" || exit 0
chown Gdnslog:adm /var/log/dnscache
# adapt resolv.conf
! grep 'nameserver 127.0.0.1' /etc/resolv.conf >/dev/null || exit 0
test -e /etc/resolv.conf || exec echo 'nameserver 127.0.0.1' >/etc/resolv.conf
sed -e 's/nameserver /# nameserver /g' /etc/resolv.conf >/etc/resolv.conf'{new}'
echo 'nameserver 127.0.0.1' >>/etc/resolv.conf'{new}'
mv -f /etc/resolv.conf'{new}' /etc/resolv.conf
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