#
# this handler will save various reports of vital system information.
# by default, all the reports are enabled and are saved in /var/backups.
#
# (1) a list of all the packages installed and removed.
#     this file can be used to restore the state of installed packages
#     by running "dpkg --set-selections < dpkg-selections.txt
# 
# (2) the partition table of all disks. 
#     this partition table can be used to format another disk of
#     the same size. this can be handy if using software raid and 
#     you have a disk go bad. just replace the disk and partition it
#     by running "sfdisk /dev/sdb < partitions.sdb.txt"
#     (MAKE SURE YOU PARTITION THE CORRECT DISK!!!)
#
# (3) hardware information. 
#     a simple report is generated of the kernel modules, the devices,
#     and the model of the hardware which 'discover' is able to detect.

getconf packages yes
getconf packagesfile /var/backups/dpkg-selections.txt

getconf partitions yes
getconf partitionsfile /var/backups/partitions.*.txt

getconf hardware yes
getconf hardwarefile /var/backups/hardware.txt

if [ "$packages" == "yes" ]; then
	if [ ! -x "`which dpkg`" ]; then
		debug 2 "can't find dpkg, skipping installed packages report."
		packages="no"
	fi
fi

if [ "$partitions" == "yes" ]; then
	if [ ! -x "`which sfdisk`" ]; then
		debug 2 "can't find sfdisk, skipping partition report."
		partitions="no"
	fi
fi

if [ "$hardware" == "yes" ]; then
	if [ ! -x "`which discover`" ]; then
		debug 2 "can't find discover, skipping hardware report."
		hardware="no"
	fi
fi

## PACKAGES ##############################

#
# here we grab a list of the packages installed and removed.
#

if [ "$packages" == "yes" ]; then
	dpkg --get-selections > $packagesfile
fi

## PARTITIONS #############################

#
# here we use sfdisk to dump a listing of all the partitions. 
# these files can be used to directly partition a disk of the same size.
#

if [ "$partitions" == "yes" ]; then
	for i in `sfdisk -l | grep "^/dev/" | awk '{print $1}'`; do
		devices=`echo $i | sed 's/[0-9]//'`
	done
	devices=`echo $devices | sort | uniq`
	for dev in $devices; do
		# remove leading /dev/
		label=${devices#/dev/}
		# replace any remaining '/'
		label=${label//\//-}
		outputfile=${partitionsfile//__star__/$label}
		sfdisk -d $dev > $outputfile
	done
fi

## HARDWARE #############################

#
# here we use discover to dump a table listing all the
# information we can find on the hardware of this machine
# 

if [ "$hardware" == "yes" ]; then
	printf "%15s%15s    %s / %s\n" "kernel module" "device" "vender" "model" > $hardwarefile
	printf "%15s%15s    %s / %s\n\n" "=============" "======" "======" "=====" >> $hardwarefile
	oldifs=$IFS
	IFS=$'\t\n'
	discover --format="'%m'\t'%d'\t'%V'\t'%M'\n" all | \
		while read module device vender model
	    	do printf "%15s%15s    %s / %s\n" "${module//\'/}" "${device//\'/}" "${vender//\'/}" "${model//\'/}" >> $hardwarefile
		done
	IFS=$oldifs
fi