postinst is in memcached 1.5.6-0ubuntu1.
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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73  | #!/bin/sh
set -e
GROUP="memcache"
USER="memcache"
DATADIR="/nonexistent"
# shamelessly copied from debian gearman-job-server package...
case "$1" in
configure)
    # creating memcache group if it isn't already there
    if ! getent group $GROUP >/dev/null ; then
            # Adding system group
            addgroup --system $GROUP >/dev/null
    fi
    # creating memcache user if it isn't already there
    if ! getent passwd $USER >/dev/null ; then
            # Adding system user
            adduser \
              --system \
              --disabled-login \
              --ingroup $GROUP \
              --home $DATADIR \
              --no-create-home \
              --gecos "Memcached" \
              --shell /bin/false \
              $USER  >/dev/null
    fi
    if [ ! -e /etc/memcached.conf ]
        then
            mkdir -p /etc
            cp /usr/share/memcached/memcached.conf.default /etc/memcached.conf
    fi
    ;;
esac
# Automatically added by dh_systemd_enable/11.1.4ubuntu1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# This will only remove masks created by d-s-h on package removal.
	deb-systemd-helper unmask 'memcached.service' >/dev/null || true
	# was-enabled defaults to true, so new installations run enable.
	if deb-systemd-helper --quiet was-enabled 'memcached.service'; then
		# Enables the unit on first installation, creates new
		# symlinks on upgrades if the unit file has changed.
		deb-systemd-helper enable 'memcached.service' >/dev/null || true
	else
		# Update the statefile to add new symlinks (if any), which need to be
		# cleaned up on purge. Also remove old symlinks.
		deb-systemd-helper update-state 'memcached.service' >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installinit/11.1.4ubuntu1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# In case this system is running systemd, we need to ensure that all
	# necessary tmpfiles (if any) are created before starting.
	if [ -d /run/systemd/system ] ; then
		systemd-tmpfiles --create /usr/lib/tmpfiles.d/memcached.conf >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installinit/11.1.4ubuntu1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/memcached" ]; then
		update-rc.d memcached defaults >/dev/null
		invoke-rc.d memcached start || exit 1
	fi
fi
# End automatically added section
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