preinst is in squid3 3.3.8-1ubuntu6.
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.
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set -e
case "$1" in
upgrade|install-upgrade)
;;
abort-upgrade)
exit 0
;;
esac
#
# Add the "proxy" user/group to /etc/passwd if needed.
#
if ! grep -q "^proxy:" /etc/passwd
then
#
# Let's hope that this works; if /var/spool/squid3 is
# already present this fails :(
#
adduser --system --home /var/spool/squid3 --group proxy
#
# Change the shell so that cron jobs will work.
# (They run as root now, but you can never know).
#
chsh -s /bin/sh proxy
fi
disable_profile() {
APP_CONFFILE="/etc/apparmor.d/usr.sbin.squid3"
APP_DISABLE="/etc/apparmor.d/disable/usr.sbin.squid3"
# Create a symlink to the yet-to-be-unpacked profile
if [ ! -e "$APP_CONFFILE" ]; then
mkdir -p `dirname $APP_DISABLE` 2>/dev/null || true
ln -sf $APP_CONFFILE $APP_DISABLE
fi
}
if [ "$1" = "install" ]; then
# Disable AppArmor profile on install
disable_profile
elif [ "$1" = "upgrade" ] && dpkg --compare-versions "$2" lt "3.1.19-1ubuntu4" ; then
# Disable AppArmor on upgrade from earlier than when we first shipped
# the profile if the user does not already have a profile defined
disable_profile
fi
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
# Automatically added by dh_installinit
if [ "$1" = install ] || [ "$1" = upgrade ]; then
if [ -e "/etc/init.d/squid3" ] && [ -L "/etc/init.d/squid3" ] \
&& [ $(readlink -f "/etc/init.d/squid3") = /lib/init/upstart-job ]
then
rm -f "/etc/init.d/squid3"
fi
fi
# End automatically added section
# Because of this bug:
# https://bugs.launchpad.net/bugs/573853
# Upstart may have lost track of squid. Correct that by using the
# pid file to stop it and then start the job back up
if [ "$1" = "upgrade" ] \
&& [ -f "/var/run/squid.pid" ] \
&& [ -f "/etc/init/squid3.conf" ]
then
SQUID_PID=`cat /var/run/squid3.pid`
# is this still running, and actually squid
if [ -d "/proc/${SQUID_PID}" ] \
&& [ "`stat -L -c %D%i /proc/${SQUID_PID}/exe`" = "`stat -L -c %D%i /usr/sbin/squid`" ]
then
UPSTART_SQUID_PID=`initctl status squid3 | awk -F'process ' '/start\/running, process / { print $2 }'`
PIDFILE_PPID=`awk '{print $4}' /proc/$SQUID_PID/stat`
# If the user has disabled expect fork the pids will be the same
if [ "$UPSTART_SQUID_PID" != "$SQUID_PID" -a "$PIDFILE_PPID" != "$UPSTART_SQUID_PID" ]
then
# stop the job
if invoke-rc.d squid3 stop
then
# kill the pid file pid
kill ${SQUID_PID}
# start the job again
invoke-rc.d squid3 start
fi
fi
fi
fi
# Automatically added by dh_installinit
if [ "$1" = install ] || [ "$1" = upgrade ]; then
if [ -e "/etc/init.d/squid3" ] && [ -L "/etc/init.d/squid3" ] \
&& [ $(readlink -f "/etc/init.d/squid3") = /lib/init/upstart-job ]
then
rm -f "/etc/init.d/squid3"
fi
fi
# End automatically added section
exit 0
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