#! /bin/sh
set -e
TYPE="$1"

case $TYPE in
    maybe-floppy)
	logger -t list-devices "deprecated parameter maybe-floppy"
	TYPE=floppy
        ;;
    maybe-usb-floppy)
        # Linux specific option, ignore it
        exit 0
        ;;
    cd|disk|partition|floppy)
        ;;
    usb-partition)
        TYPE=usb_partition
        ;;
    *)
	echo "Usage: $0 cd|disk|partition|floppy|maybe-usb-floppy|usb-partition" >&2
	exit 2
        ;;
esac

#
# We are using the entries present in /dev to detect the different kind
# of devices. Some heuristics are then used to refine the result.
#

is_cd() {
	echo "$1" | egrep -q '^/dev/cd[0-9]+$' || return 1
	
	return 0
}

is_disk() {
	echo "$1" | egrep -q '^/dev/(ad|da)[0-9]+$' || return 1
	
	return 0
}

is_partition() {
	echo "$1" | egrep -q '^/dev/((ad|da)[0-9]+[ps][0-9]+[a-z]?$|md[0-9])+$' || return 1
	
	return 0
}

is_floppy() {
	echo "$1" | egrep -q '^/dev/fd[0-9]+$' || return 1

	return 0
}

is_usb_partition() {
	echo "$1" | egrep -q '^/dev/(ad|da)[0-9]+[ps][0-9]+$' || return 1
	drive="$(echo "$1" | sed -e 's,^/dev/,,' -e 's,[ps][0-9]\+,,')"
	grep -q "kernel: $drive at umass" /var/log/syslog || return 1

 	return 0
}

# Loop through all /dev/ entries and test all the character ones
for x in /dev/* ; do
	[ -c "$x" ] || continue

	if is_$TYPE "$x" ; then
		echo $x
	fi
done

exit 0