postinst

#! /bin/sh
# postinst script for kexec-tools
#
# see: dh_installdeb(1)

set -e

update_param() {                                                               
        eval old=\"'$'$1\"
        eval new=\"'$'new_$1\"

        if test "$old" = "$new"; then
                return
        fi

        if test -z "$old"; then
                grep -Eq "^ *$1=" "$INITCONFFILE" || echo "$1=" \
                       >> "$INITCONFFILE"
        fi

	sed -e "s/^ *$1=.*/$1=$new/" < $INITCONFFILE > $INITCONFFILE.$$
	mv -f $INITCONFFILE.$$ $INITCONFFILE
}

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
#

case "$1" in
    configure)
	if [ -L /etc/rc6.d/K39kexec-load ]; then
	    # remove this old entry, we'll add correct one below
	    update-rc.d -f kexec-load remove > /dev/null || exit 0
	fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    exit 0	
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# Handle debconf
. /usr/share/debconf/confmodule
                                                                                                                              
INITCONFFILE=/etc/default/kexec
 
# We generate several files during the postinst, and we don't want
#       them to be readable only by root.
umask 022
 
# Generate configuration file if it does not exist, using default values.
[ -r "${INITCONFFILE}" ] || {
        echo Generating ${INITCONFFILE}... >&2
        cat >${INITCONFFILE} <<'EOFMAGICNUMBER1234'
# Defaults for kexec initscript
# sourced by /etc/init.d/kexec and /etc/init.d/kexec-load

# Load a kexec kernel (true/false)
LOAD_KEXEC=false

# Kernel and initrd image
KERNEL_IMAGE="/vmlinuz"
INITRD="/initrd.img"

# If empty, use current /proc/cmdline
APPEND=""

# Load the default kernel from grub config (true/false)
USE_GRUB_CONFIG=false
EOFMAGICNUMBER1234
}

# Add USE_GRUB_CONFIG parameter to config file if it does not exist
. ${INITCONFFILE}
if test -z "$USE_GRUB_CONFIG" ; then
	echo "" >> ${INITCONFFILE}
	echo "# Load the default kernel from grub config (true/false)" >> ${INITCONFFILE}
	echo "USE_GRUB_CONFIG=" >> ${INITCONFFILE}
fi

# Detect if system is configured to place kernel link under /boot instead of /
# If yes, update kernel and initrd image locations in config file
if [ -f /etc/kernel-img.conf ]; then
	LINK_IN_BOOT=`grep link_in_boot /etc/kernel-img.conf | cut -f2 -d= | tr -d '[:blank:]'`
	if [ "$LINK_IN_BOOT" = "yes" ]; then
		sed -e "s/KERNEL_IMAGE=\"\/vmlinuz\"/KERNEL_IMAGE=\"\/boot\/vmlinuz\"/" < ${INITCONFFILE} > ${INITCONFFILE}.$$
		mv -f ${INITCONFFILE}.$$ $INITCONFFILE
		sed -e "s/INITRD=\"\/initrd.img\"/INITRD=\"\/boot\/initrd.img\"/" < ${INITCONFFILE} > ${INITCONFFILE}.$$
		mv -f ${INITCONFFILE}.$$ $INITCONFFILE
	else
		sed -e "s/KERNEL_IMAGE=\"\/boot\/vmlinuz\"/KERNEL_IMAGE=\"\/vmlinuz\"/" < ${INITCONFFILE} > ${INITCONFFILE}.$$
		mv -f ${INITCONFFILE}.$$ $INITCONFFILE
		sed -e "s/INITRD=\"\/boot\/initrd.img\"/INITRD=\"\/initrd.img\"/" < ${INITCONFFILE} > ${INITCONFFILE}.$$
		mv -f ${INITCONFFILE}.$$ $INITCONFFILE
	fi
fi

# Determine if vmlinux is actually used and adjust INITCONFFILE
if [ -f /boot/vmlinux -o -f /vmlinux ]; then
	sed -e "s/vmlinuz/vmlinux/" -i ${INITCONFFILE}
fi

# ------------------------- Debconf questions start ---------------------

db_get kexec-tools/load_kexec || RET=false
new_LOAD_KEXEC="${RET}"
update_param LOAD_KEXEC

if [ -d /boot/grub ]
then
	db_get kexec-tools/use_grub_config || RET=true
	new_USE_GRUB_CONFIG="${RET}"
else
	new_USE_GRUB_CONFIG="false"
	db_set kexec-tools/use_grub_config "false"
fi
update_param USE_GRUB_CONFIG
                                                                                                                              
# ------------------------- Debconf questions end ---------------------

# no triggers in grub2,
#  see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=481542
if [ -x /usr/sbin/update-grub ] && [ -e /boot/grub/grub.cfg ]; then
	update-grub
fi

# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/kexec" ]; then
		update-rc.d kexec defaults >/dev/null
	fi
	if [ -x "/etc/init.d/kexec" ] || [ -e "/etc/init/kexec.conf" ]; then
		invoke-rc.d kexec start || exit $?
	fi
fi
# End automatically added section
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/kexec-load" ]; then
		update-rc.d kexec-load defaults >/dev/null
	fi
	if [ -x "/etc/init.d/kexec-load" ] || [ -e "/etc/init/kexec-load.conf" ]; then
		invoke-rc.d kexec-load start || exit $?
	fi
fi
# End automatically added section


exit 0
kexec-tools 1:2.0.10-1ubuntu2 / postinst
