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#
# 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. 
#     write to a text file the important things which hwinfo can gleen.
#

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

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

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

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

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

if [ "$hardware" == "yes" ]; then
	if [ ! -x "`which hwinfo`" ]; then
		warning "can't find hwinfo, 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
	devices=`hwinfo --disk | grep "Device File" | cut -d\  -f5`
	for dev in $devices; do
		[ -b $dev ] || continue
		label=${dev#/dev/}
		label=${label//\//-}
		outputfile=${partitionsfile//__star__/$label}
		debug "sfdisk -d $dev > $outputfile"
		sfdisk -d $dev > $outputfile
	done
fi

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

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

if [ "$hardware" == "yes" ]; then
	if [ -f $hardwarefile ]; then
		rm $hardwarefile
	fi
	touch $hardwarefile
	echo -e "\n\n====================== summary ======================\n" >>  $hardwarefile
	debug "hwinfo --short --cpu --network --disk --pci  >> $hardwarefile"
	hwinfo --short --cpu --network --disk --pci  >> $hardwarefile
	for flag in cpu network disk bios pci; do
		echo -e "\n\n====================== $flag ======================\n" >>  $hardwarefile
		hwinfo --$flag >> $hardwarefile
	done
fi