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#!/bin/sh

case "$DPKG_MAINTSCRIPT_PACKAGE::$DPKG_MAINTSCRIPT_NAME" in
   linux-image-extra*::postrm)
      exit 0;;
esac

KERNEL_UPGRADED=0
# Prefer showing the canonical-livepatch reboot message if one is required
if [ -f "/snap/bin/canonical-livepatch" ]; then
    # k-u-r returns 1 if livepatch isn't enabled or if a reboot isn't required
    kur_rc=$(/snap/bin/canonical-livepatch kernel-upgrade-required 2> /dev/null)
    if [ $? -eq 0 ]; then
        exit 0;
    elif [ $? -eq 1 ]; then
        # status returns 1 if livepatch isn't enabled
        status_rc=$(/snap/bin/canonical-livepatch status 2> /dev/null)
        if [ $? -eq 0 ]; then
            KERNEL_UPGRADED=1
        fi
    fi
fi

# while a reboot isn't required for the new kernel it might be for another package
if [ $KERNEL_UPGRADED -eq 1 ]; then
    if [ "$(echo $DPKG_MAINTSCRIPT_PACKAGE | cut -c1-5)" = "linux" ]; then
        exit 0;
    fi
fi

if [ -d /var/run ]; then
    touch /var/run/reboot-required
    if ! grep -q "^$DPKG_MAINTSCRIPT_PACKAGE$" /var/run/reboot-required.pkgs 2> /dev/null ; then
        echo "$DPKG_MAINTSCRIPT_PACKAGE" >> /var/run/reboot-required.pkgs
    fi
fi