#!/bin/sh set -e systemctl_stop() { unit="$1" echo "Stopping unit $unit" systemctl stop -q "$unit" || true for i in $(seq 20); do echo "Waiting until unit $unit is stopped [attempt $i]" if ! systemctl is-active -q "$unit"; then echo "$unit is stopped." return fi sleep .1 done } if [ "$1" = "purge" ]; then # Undo any bind mounts to ${SNAP_MOUNT_DIR} or /var/snap done by parallel # installs or LP:#1668659 for mp in /snap /var/snap; do if grep -q " $mp $mp" /proc/self/mountinfo; then umount -l "$mp" || true fi done units=$(systemctl list-unit-files --full | grep '^snap[-.]' | cut -f1 -d ' ' | grep -vF snap.mount.service || true) mounts=$(echo "$units" | grep '^snap[-.].*\.mount$' || true) services=$(echo "$units" | grep '^snap[-.].*\.service$' || true) for unit in $services $mounts; do # ensure its really a snap mount unit or systemd unit if ! grep -q 'What=/var/lib/snapd/snaps/' "/etc/systemd/system/$unit" && ! grep -q 'X-Snappy=yes' "/etc/systemd/system/$unit"; then echo "Skipping non-snapd systemd unit $unit" continue fi echo "Stopping $unit" systemctl_stop "$unit" # if it is a mount unit, we can find the snap name in the mount # unit (we just ignore unit files) snap=$(grep 'Where=/snap/' "/etc/systemd/system/$unit"|cut -f3 -d/) rev=$(grep 'Where=/snap/' "/etc/systemd/system/$unit"|cut -f4 -d/) if [ -n "$snap" ]; then echo "Removing snap $snap and revision $rev" # aliases if [ -d /snap/bin ]; then find /snap/bin -maxdepth 1 -lname "$snap" -delete find /snap/bin -maxdepth 1 -lname "$snap.*" -delete fi # generated binaries rm -f "/snap/bin/$snap" rm -f "/snap/bin/$snap".* # snap mount dir # we pass -d (clean up loopback devices) for trusty compatibility umount -d -l "/snap/$snap/$rev" 2> /dev/null || true rm -rf "/snap/$snap/$rev" rm -f "/snap/$snap/current" # snap data dir rm -rf "/var/snap/$snap/$rev" rm -rf "/var/snap/$snap/common" rm -f "/var/snap/$snap/current" # opportunistic remove (may fail if there are still revisions left for d in "/snap/$snap" "/var/snap/$snap"; do if [ -d "$d" ]; then rmdir --ignore-fail-on-non-empty "$d" || true fi done # udev rules find /etc/udev/rules.d -name "*-snap.${snap}.rules" -execdir rm -f "{}" \; # dbus policy files if [ -d /etc/dbus-1/system.d ]; then find /etc/dbus-1/system.d -name "snap.${snap}.*.conf" -execdir rm -f "{}" \; fi # modules rm -f "/etc/modules-load.d/snap.${snap}.conf" # timer and socket units find /etc/systemd/system -name "snap.${snap}.*.timer" -o -name "snap.${snap}.*.socket" | while read -r f; do systemctl_stop "$(basename "$f")" rm -f "$f" done # user services, sockets, and timers - we make no attempt to stop any of them. # TODO: ask snapd to ask each snapd.session-agent.service to stop snaps # user-session services and stop itself. find /etc/systemd/user -name "snap.${snap}.*.timer" -o -name "snap.${snap}.*.socket" -o -name "snap.${snap}.*.service" | while read -r f; do rm -f "$f" done fi echo "Removing $unit" rm -f "/etc/systemd/system/$unit" rm -f "/etc/systemd/system/multi-user.target.wants/$unit" done # snapd session-agent rm -f /etc/systemd/user/snapd.session-agent.socket rm -f /etc/systemd/user/snapd.session-agent.service rm -f /etc/systemd/user/sockets.target.wants/snapd.session-agent.socket # generated readme files rm -f "/snap/README" echo "Discarding preserved snap namespaces" # opportunistic as those might not be actually mounted if [ -d /run/snapd/ns ]; then if [ "$(find /run/snapd/ns/ -name "*.mnt" | wc -l)" -gt 0 ]; then for mnt in /run/snapd/ns/*.mnt; do umount -l "$mnt" || true rm -f "$mnt" done fi find /run/snapd/ns/ \( -name '*.fstab' -o -name '*.user-fstab' -o -name '*.info' \) -delete umount -l /run/snapd/ns/ || true fi # inside containers we have a generator that creates a bind mount to /snap if [ -e /run/systemd/container ]; then echo "Unmount /snap inside a container" umount /snap || true fi echo "Final directory cleanup" for d in "/snap/bin" "/snap" "/var/snap"; do # Force remove due to directories for old revisions could still exist rm -rf "$d" if [ -d "$d" ]; then echo "Cannot remove directory $d" fi done echo "Removing extra snap-confine apparmor rules" rm -f /etc/apparmor.d/snap.core.*.usr.lib.snapd.snap-confine echo "Removing snapd cache" rm -rf /var/cache/snapd/* echo "Removing snapd state" rm -rf /var/lib/snapd fi # Automatically added by dh_installdeb/13.3.4 dpkg-maintscript-helper rm_conffile /etc/apparmor.d/usr.lib.snapd.snap-confine 2.23.6~ snap-confine -- "$@" # End automatically added section # Automatically added by dh_installdeb/13.3.4 dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/snappy.conf 2.0.7~ -- "$@" # End automatically added section # Automatically added by dh_installdeb/13.3.4 dpkg-maintscript-helper rm_conffile /etc/grub.d/09_snappy 1.7.3ubuntu1 -- "$@" # End automatically added section # Automatically added by dh_apparmor/2.13.6-10 if [ "$1" = "purge" ] && ! [ -e "/etc/apparmor.d/usr.lib.snapd.snap-confine.real" ] ; then rm -f "/etc/apparmor.d/disable/usr.lib.snapd.snap-confine.real" || true rm -f "/etc/apparmor.d/force-complain/usr.lib.snapd.snap-confine.real" || true rm -f "/etc/apparmor.d/local/usr.lib.snapd.snap-confine.real" || true rm -f /var/cache/apparmor/*/"usr.lib.snapd.snap-confine.real" || true rmdir /etc/apparmor.d/disable 2>/dev/null || true rmdir /etc/apparmor.d/local 2>/dev/null || true rmdir /etc/apparmor.d 2>/dev/null || true fi # End automatically added section # Automatically added by dh_systemd_start/13.3.4 if [ -d /run/systemd/system ] && [ "$1" = remove ]; then systemctl --system daemon-reload >/dev/null || true fi # End automatically added section # Automatically added by dh_systemd_enable/13.3.4 if [ "$1" = "remove" ]; then if [ -x "/usr/bin/deb-systemd-helper" ]; then deb-systemd-helper mask 'snapd.recovery-chooser-trigger.service' 'snapd.seeded.service' 'snapd.service' 'snapd.socket' >/dev/null || true fi fi if [ "$1" = "purge" ]; then if [ -x "/usr/bin/deb-systemd-helper" ]; then deb-systemd-helper purge 'snapd.recovery-chooser-trigger.service' 'snapd.seeded.service' 'snapd.service' 'snapd.socket' >/dev/null || true deb-systemd-helper unmask 'snapd.recovery-chooser-trigger.service' 'snapd.seeded.service' 'snapd.service' 'snapd.socket' >/dev/null || true fi fi # End automatically added section