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✏️ Editing: systemd.postinst

#!/bin/sh

set -e

_systemctl() {
    if [ -d /run/systemd/system ]; then
        systemctl "$@"
    fi
}

_update_catalog() {
    journalctl --update-catalog || true
}

# Update Message Catalogs database in response to dpkg trigger
if [ "$1" = "triggered" ]; then
    _update_catalog
    exit 0
fi

# Enable getty and remote-fs.target by default on new installs
if [ -z "$2" ]; then
    systemctl enable getty@tty1.service || true
    systemctl enable remote-fs.target || true
fi

# Enable resolved by default on new installs installs and upgrades
if dpkg --compare-versions "$2" lt "234-1ubuntu2~"; then
    systemctl enable systemd-resolved.service || true
fi

# Drop stock /etc/rc.local on upgrades
if dpkg --compare-versions "$2" lt "234-2ubuntu11~"; then
        if [ -f /etc/rc.local ]; then
                if [ "10fd9f051accb6fd1f753f2d48371890" = "$(md5sum /etc/rc.local | cut -d\  -f1)" ]; then
                        echo Removing empty /etc/rc.local
                        rm -f /etc/rc.local || true
                fi
        fi
fi

# Use stub resolve.conf by default on new installs
if [ -z "$2" ]; then
    mkdir -p /run/systemd/resolve
    if [ -e /etc/resolv.conf ]; then
            cp /etc/resolv.conf /run/systemd/resolve/stub-resolv.conf
    fi
    # If /etc/resolv.conf is a bind-mount, moving or replacing
    # /etc/resolv.conf may fail
    ln -snf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf || true
fi

# Enable systemd-pstore by default on new installs and upgrades, see #952767
if dpkg --compare-versions "$2" lt "245.4-4~"; then
    systemctl enable systemd-pstore.service || true
fi

# Create /etc/machine-id
systemd-machine-id-setup

# Setup system users and groups
addgroup --quiet --system systemd-journal

adduser --quiet --system --group --no-create-home --home /run/systemd \
    --gecos "systemd Network Management" systemd-network
adduser --quiet --system --group --no-create-home --home /run/systemd \
    --gecos "systemd Resolver" systemd-resolve

# Enable persistent journal, in auto-mode, by default on new installs installs and upgrades
if dpkg --compare-versions "$2" lt "235-3ubuntu3~"; then
    mkdir -p /var/log/journal
    # create tmpfiles only when running systemd, otherwise %b substitution fails
    if [ -d /run/systemd/system ]; then
        systemd-tmpfiles --create --prefix /var/log/journal
    fi
fi

# Initial update of the Message Catalogs database
_update_catalog

# Disable networkd when upgrading from broken versions 8..10. Turns out
# enabling networkd unconditionally has long boot time side-effects
if dpkg --compare-versions "$2" gt "234-2ubuntu8~" &&
   dpkg --compare-versions "$2" lt "234-2ubuntu11~"; then
    systemctl disable systemd-networkd-wait-online.service || true
fi

# skip daemon-reexec and try-restarts during shutdown to avoid hitting LP: #1803391
if [ -n "$2" ] && [ "$(systemctl is-system-running)" != "stopping" ]; then
    # LP: #2013543 - the systemd cmdline can get mangled depending on the
    # contents of /proc/cmdline, which causes systemd to fail to deserialize
    # it's previous state on daemon-reexec. This means that for upgrades from
    # affected versions, we need a reboot and cannot re-exec here, else the
    # bug could be triggered.
    if dpkg --compare-versions "$2" lt "249.11-0ubuntu3.10~"; then
        if ! grep -Fqsx systemd /run/reboot-required.pkgs; then
            echo systemd >> /run/reboot-required.pkgs || true
        fi

# Reload to avoid warnings when restarting services below
        _systemctl daemon-reload || true
    else
        _systemctl daemon-reexec || true
    fi

# don't restart logind; this can be done again once this gets implemented:
    # https://github.com/systemd/systemd/issues/1163
    if dpkg --compare-versions "$2" lt-nl "246.2-2~"; then
        # the socket configuration changed
        _systemctl stop systemd-networkd.socket || true
    fi
    _systemctl try-restart systemd-networkd.service || true
    _systemctl try-restart systemd-resolved.service || true
    _systemctl try-restart systemd-journald.service || true
fi

# Process all tmpfiles that we ship, including any overrides in
# runtime-dir/sysadmin-dir/other packages (e.g. rsyslog)
#
# Ignore if this fails, because e.g. %b will fail on WSL
systemd-tmpfiles --create || :

if dpkg --compare-versions "$2" lt-nl "245.4-4~"; then
    # systemd-pstore.service is now enabled via sysinit.target
    rm -f /etc/systemd/system/systemd-remount-fs.service.wants/systemd-pstore.service
    rmdir --ignore-fail-on-non-empty /etc/systemd/system/systemd-remount-fs.service.wants 2> /dev/null || true
fi

if dpkg --compare-versions "$2" lt-nl "245.4-5~"; then
    # Clean up removed ondemand service
    rm -f /etc/systemd/system/multi-user.target.wants/ondemand.service
fi

# Automatically added by dh_installtmpfiles/13.6ubuntu1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# In case this system is running systemd, we need to ensure that all
	# necessary tmpfiles (if any) are created before starting.
	if [ -z "${DPKG_ROOT:-}" ] && [ -d /run/systemd/system ] ; then
		systemd-tmpfiles --create debian.conf home.conf journal-nocow.conf legacy.conf systemd-nologin.conf systemd-pstore.conf systemd-tmp.conf systemd.conf tmp.conf var.conf x11.conf >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installdeb/13.6ubuntu1
dpkg-maintscript-helper rm_conffile /etc/dhcp/dhclient-exit-hooks.d/timesyncd 245.4-2\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/systemd/timesyncd.conf 245.4-2\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/dhcp/dhclient-enter-hooks.d/resolved 246-2ubuntu1\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/pam.d/systemd-user 246.6-3\~ -- "$@"
# End automatically added section

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