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Current File : /var/lib/dpkg/info/snapd.postrm
#!/bin/sh

set -e

# "powerpc" is not supported unfortunately, do nothing here# 
if [ "$DPKG_MAINTSCRIPT_ARCH" = powerpc ]; then
    exit 0
fi

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 and /var/snap that resulted from parallel
    # installs for classic snaps or LP:#1668659 (for /snap only, that bug can't
    # happen in trusty -- and doing this would mess up snap.mount.service there)
    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$' || true)
    slices=$(echo "$units" | grep '^snap[-.].*\.slice$' || true)

    for unit in $services $mounts $slices; do
        # ensure its really a snap mount unit or systemd unit
        if ! grep -q 'What=/var/lib/snapd/snaps/' "/etc/systemd/system/$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/$rev" 2> /dev/null || true
            rm -rf --one-file-system "/snap/$snap/$rev"
            rm -f "/snap/$snap/current"
            # snap data dir
            rm -rf --one-file-system "/var/snap/$snap/$rev"
            rm -rf --one-file-system "/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.${snap}.conf"
            rm -f "/etc/modprobe.d/snap.${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/$unit"
        rm -f "/etc/systemd/system/snapd.mounts.target.wants/$unit"
    done
    # Remove empty ".wants/" directory created by enabling mount units
    rmdir "/etc/systemd/system/snapd.mounts.target.wants" || true
    # Units may have been removed do a reload
    systemctl -q daemon-reload || true

    # 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

    # dbus activation configuration
    rm -f /etc/dbus-1/session.d/snapd.session-services.conf
    rm -f /etc/dbus-1/system.d/snapd.system-services.conf

    # 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 --one-file-system "$d" || true
        if [ -d "$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/12.10ubuntu1
dpkg-maintscript-helper rm_conffile /etc/sudoers.d/99-snapd.conf 2.50~ -- "$@"
# End automatically added section
# Automatically added by dh_installdeb/12.10ubuntu1
dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/snappy.conf 2.0.7~ -- "$@"
# End automatically added section
# Automatically added by dh_installdeb/12.10ubuntu1
dpkg-maintscript-helper rm_conffile /etc/grub.d/09_snappy 1.7.3ubuntu1 -- "$@"
# End automatically added section
# Automatically added by dh_installdeb/12.10ubuntu1
dpkg-maintscript-helper rm_conffile /etc/apparmor.d/usr.lib.snapd.snap-confine 2.23.6~ -- "$@"
# End automatically added section
# Automatically added by dh_systemd_start/12.10ubuntu1
if [ -d /run/systemd/system ]; then
	systemctl --system daemon-reload >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_systemd_start/12.10ubuntu1
if [ -d /run/systemd/system ]; then
	systemctl --system daemon-reload >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_systemd_start/12.10ubuntu1
if [ -d /run/systemd/system ]; then
	systemctl --system daemon-reload >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_systemd_enable/12.10ubuntu1
if [ "$1" = "remove" ]; then
	if [ -x "/usr/bin/deb-systemd-helper" ]; then
		deb-systemd-helper mask 'snapd.apparmor.service' 'snapd.autoimport.service' 'snapd.core-fixup.service' 'snapd.recovery-chooser-trigger.service' 'snapd.seeded.service' 'snapd.service' 'snapd.snap-repair.timer' 'snapd.socket' 'snapd.system-shutdown.service' >/dev/null || true
	fi
fi

if [ "$1" = "purge" ]; then
	if [ -x "/usr/bin/deb-systemd-helper" ]; then
		deb-systemd-helper purge 'snapd.apparmor.service' 'snapd.autoimport.service' 'snapd.core-fixup.service' 'snapd.recovery-chooser-trigger.service' 'snapd.seeded.service' 'snapd.service' 'snapd.snap-repair.timer' 'snapd.socket' 'snapd.system-shutdown.service' >/dev/null || true
		deb-systemd-helper unmask 'snapd.apparmor.service' 'snapd.autoimport.service' 'snapd.core-fixup.service' 'snapd.recovery-chooser-trigger.service' 'snapd.seeded.service' 'snapd.service' 'snapd.snap-repair.timer' 'snapd.socket' 'snapd.system-shutdown.service' >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_apparmor/2.13.3-7ubuntu5.4
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
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