path: root/usr.sbin/bsdconfig/share/device.subr

if [ ! "$_DEVICE_SUBR" ]; then _DEVICE_SUBR=1
#
# Copyright (c) 2012-2013 Devin Teske
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
############################################################ INCLUDES

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." device.subr
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/strings.subr
f_include $BSDCFG_SHARE/struct.subr

BSDCFG_LIBE="/usr/libexec/bsdconfig"
f_include_lang $BSDCFG_LIBE/include/messages.subr

############################################################ GLOBALS

DEVICES=
DEVICE_NAMES=
NDEVICES=0

# A "device" from sysinstall's point of view
f_struct_define DEVICE \
	name		\
	desc		\
	devname		\
	type		\
	capacity	\
	enabled		\
	init		\
	get		\
	shutdown	\
	flags		\
	private		\
	volume	

# Network devices have their `private' property set to this
f_struct_define DEVICE_INFO \
	use_rtsol use_dhcp ipaddr ipv6addr netmask extras

setvar DEVICE_TYPE_NONE		1
setvar DEVICE_TYPE_DISK		2
setvar DEVICE_TYPE_FLOPPY	3
setvar DEVICE_TYPE_FTP		4
setvar DEVICE_TYPE_NETWORK	5
setvar DEVICE_TYPE_CDROM	6
setvar DEVICE_TYPE_USB		7
setvar DEVICE_TYPE_DOS		8
setvar DEVICE_TYPE_UFS		9
setvar DEVICE_TYPE_NFS		10
setvar DEVICE_TYPE_ANY		11
setvar DEVICE_TYPE_HTTP_PROXY	12
setvar DEVICE_TYPE_HTTP		13

# Network devices have the following flags available
setvar IF_ETHERNET	1
setvar IF_WIRELESS	2
setvar IF_ACTIVE	4

#
# Default behavior is to call f_device_get_all() automatically when loaded.
#
: ${DEVICE_SELF_SCAN_ALL=1}

############################################################ FUNCTIONS

# f_device_try $name [$i [$var_path]]
#
# Test a particular device. If $i is given, then $name is expected to contain a
# single "%d" where $i will be inserted using printf. If $var_path is given,
# it is used as a variable name to provide the caller the device pathname.
#
# Returns success if the device path exists and is a cdev.
#
f_device_try()
{
	local name="$1" i="$2" var_path="$3" unit
	if [ "$i" ]; then
		f_sprintf unit "$name" "$i"
	else
		unit="$name"
	fi
	case "$unit" in
	/dev/*) : good ;; # already qualified
	*) unit="/dev/$unit" ;;
	esac
	[ "$var_path" ] && setvar "$var_path" "$unit"
	f_dprintf "f_device_try: making sure %s is a device node" "$unit"
	if [ -c "$unit" ]; then
		f_dprintf "f_device_try: %s is a cdev [good]" "$unit"
		return $SUCCESS
	else
		f_dprintf "f_device_try: %s is not a cdev [skip]" "$unit"
		return $FAILURE
	fi
}

# f_device_register $name $desc $devname $type $enabled $init_function \
#                   $get_function $shutdown_function $private $capacity
#
# Register a device. A `structure' (see struct.subr) is created with the name
# device_$name (so make sure $name contains only alpha-numeric characters or
# the underscore, `_'). The remaining arguments after $name correspond to the
# properties of the `DEVICE' structure-type (defined above).
#
# If not already registered, the device is then appended to the DEVICES
# environment variable, a space-separated list of all registered devices.
#
f_device_register()
{
	local name="$1" desc="$2" devname="$3" type="$4" enabled="$5"
	local init_func="$6" get_func="$7" shutdown_func="$8" private="$9"
	local capacity="${10}"

	f_struct_new DEVICE "device_$name" || return $FAILURE
	device_$name set name     "$name"
	device_$name set desc     "$desc"
	device_$name set devname  "$devname"
	device_$name set type     "$type"
	device_$name set enabled  "$enabled"
	device_$name set init     "$init_func"
	device_$name set get      "$get_func"
	device_$name set shutdown "$shutdown_func"
	device_$name set private  "$private"
	device_$name set capacity "$capacity"

	# Scan our global register to see if it needs ammending
	local dev found=
	for dev in $DEVICES; do
		[ "$dev" = "$name" ] || continue
		found=1 && break
	done
	[ "$found" ] || DEVICES="$DEVICES $name"

	return $SUCCESS
}

# f_device_reset
#
# Reset the registered device chain.
#
f_device_reset()
{
	local dev
	for dev in $DEVICES; do
		f_device_shutdown $dev

		#
		# XXX this potentially leaks $dev->private if it's being
		# used to point to something dynamic, but you're not supposed
		# to call this routine at such times that some open instance
		# has its private member pointing somewhere anyway. XXX
		#
		f_struct_free device_$dev
	done
	DEVICES=
}

# f_device_reset_network
#
# Reset the registered network device chain.
#
f_device_reset_network()
{
	local dev type private pruned_list=
	for dev in $DEVICES; do
		device_$dev get type type
		if [ "$type" != "$DEVICE_TYPE_NETWORK" ]; then
			pruned_list="$pruned_list $dev"
			continue
		fi

		#
		# Leave the device up (don't call shutdown routine)
		#

		# Network devices may have DEVICE_INFO private member
		device_$dev get private private
		[ "$private" ] && f_struct_free "$private"

		f_struct_free device_$dev
	done
	DEVICES="${pruned_list# }"
}

# f_device_get_all
#
# Get all device information for devices we have attached.
#
f_device_get_all()
{
	local devname desc capacity

	f_dprintf "f_device_get_all: Probing devices..."
	f_dialog_info "$msg_probing_devices_please_wait_this_can_take_a_while"

	# First go for the network interfaces
	f_device_get_all_network

	# Next, try to find all the types of devices one might use
	# as a media source for content
	#

	local dev type max n=0
	for dev in $DEVICE_NAMES; do
		n=$(( $n + 1 ))
		# Get the desc, type, and max (with debugging disabled)
		# NOTE: Bypassing f_device_name_get() for efficiency
		# ASIDE: This would be equivalent to the following:
		# 	debug= f_device_name_get $dev desc
		# 	debug= f_device_name_get $dev type
		# 	debug= f_device_name_get $dev max
		debug= f_getvar _device_desc$n desc
		debug= f_getvar _device_type$n type
		debug= f_getvar _device_max$n max

		local k=0
		while [ $k -lt ${max:-0} ]; do
			i=$k k=$(( $k + 1 ))
			devname=""
			case "$type" in
			$DEVICE_TYPE_CDROM)
				f_device_try "$dev" "$i" devname || continue
				f_device_capacity "$devname" capacity
				f_device_register "${devname##*/}" "$desc" \
					"$devname" $DEVICE_TYPE_CDROM 1 \
					f_media_init_cdrom f_media_get_cdrom \
					f_media_shutdown_cdrom "" "$capacity"
				f_dprintf "Found a CDROM device for %s" \
				          "$devname"
				;;
			$DEVICE_TYPE_FLOPPY)
				f_device_try "$dev" "$i" devname || continue
				f_device_capacity "$devname" capacity
				f_device_register "${devname##*/}" "$desc" \
					"$devname" $DEVICE_TYPE_FLOPPY 1 \
					f_media_init_floppy \
					f_media_get_floppy \
					f_media_shutdown_floppy "" "$capacity"
				f_dprintf "Found a floppy device for %s" \
				          "$devname"
				;;
			$DEVICE_TYPE_USB)
				f_device_try "$dev" "$i" devname || continue
				f_device_capacity "$devname" capacity
				f_device_register "${devname##*/}" "$desc" \
					"$devname" $DEVICE_TYPE_USB 1 \
					f_media_init_usb f_media_get_usb \
					f_media_shutdown_usb "" "$capacity"
				f_dprintf "Found a USB disk for %s" "$devname"
				;;
			esac
		done
	done

	# Register ISO9660 providers as CDROM devices
	for devname in /dev/iso9660/*; do
		f_device_try "$devname" || continue
		f_device_capacity "$devname" capacity
		f_device_register "${devname##*/}" "ISO9660 file system" \
			"$devname" $DEVICE_TYPE_CDROM 1 \
			f_media_init_cdrom f_media_get_cdrom \
			f_media_shutdown_cdrom "" "$capacity"
		f_dprintf "Found a CDROM device for %s" "$devname"
	done

	# Scan for mdconfig(8)-created md(4) devices
	local filename
	for devname in /dev/md[0-9] /dev/md[0-9][0-9]; do
		f_device_try "$devname" || continue

		# See if the md(4) device is a vnode type backed by a file
		filename=$( sysctl kern.geom.conftxt |
			awk -v devname="${devname##*/}" \
			'
				( $2 == "MD" ) && \
				( $3 == devname ) && \
				( $(NF-2) == "vnode" ) && \
				( $(NF-1) == "file" ) \
				{
					print $NF
				}
			' )
		case "$filename" in
		*.iso) # Register the device as an ISO9660 provider
			f_device_capacity "$devname" capacity
			f_device_register "${devname##*/}" \
				"md(4) vnode file system" \
				"$devname" $DEVICE_TYPE_CDROM 1 \
				f_media_init_cdrom f_media_get_cdrom \
				f_media_shutdown_cdrom "" "$capacity"
			f_dprintf "Found a CDROM device for %s" "$devname"
			;;
		esac
	done

	# Finally go get the disks and look for partitions to register
	local diskname slices index type rest slice part
	for diskname in $( sysctl -n kern.disks ); do

		case "$diskname" in
		cd*)
			# XXX
			#  Due to unknown reasons, kern.disks returns SCSI
			# CDROM as a valid disk. This will prevent bsdconfig
			# from presenting SCSI CDROMs as available disks in
			# various menus. Why GEOM treats SCSI CDROM as a disk
			# is beyond me and that should be investigated.
			# For temporary workaround, ignore SCSI CDROM device.
			#
			continue ;;
		esac

		# Try to create a list of partitions and their types,
		# consisting of "N,typeN ..." (e.g., "1,0xa5 2,0x06").
		if ! slices=$( fdisk -p "$diskname" 2> /dev/null |
			awk '( $1 == "p" ) { print $2","$3 }' )
		then
			f_dprintf "Unable to open disk %s" "$diskname"
			continue
		fi

		# Try and find its description
		f_device_desc "$diskname" $DEVICE_TYPE_DISK desc

		f_device_capacity "$diskname" capacity
		f_device_register "$diskname" "$desc" \
		                  "/dev/$diskname" $DEVICE_TYPE_DISK 0 \
		                  "" "" "" "" "$capacity"
		f_dprintf "Found a disk device named %s" "$diskname"

		# Look for existing partitions to register
		for slice in $slices; do
			index="${slice%%,*}" type="${slice#*,}"
			slice=${diskname}s$index
			case "$type" in
			0x01|0x04|0x06|0x0b|0x0c|0x0e|0xef)
				# DOS partitions to add as "DOS media devices"
				f_device_capacity "/dev/$slice" capacity
				f_device_register "$slice" "" \
					"/dev/$slice" $DEVICE_TYPE_DOS 1 \
					f_media_init_dos f_media_get_dos \
					f_media_shutdown_dos "" "$capacity"
				f_dprintf "Found a DOS partition %s" "$slice"
				;;
			0xa5) # FreeBSD partition
				for part in $(
					bsdlabel -r $slice 2> /dev/null |
						awk -v slice="$slice" '
						( $1 ~ /[abdefgh]:/ ) {
							printf "%s%s\n",
							       slice,
							       substr($1,1,1)
						}'
				); do
					f_quietly dumpfs -m /dev/$part ||
						continue
					f_device_capacity \
						"$/dev/$part" capacity
					f_device_register \
						"$part" "" "/dev/$part" \
						$DEVICE_TYPE_UFS 1 \
						f_media_init_ufs \
						f_media_get_ufs \
						f_media_shutdown_ufs "" \
						"$capacity"
					f_dprintf "Found a UFS partition %s" \
					          "$part"
				done # parts
				;;
			esac
		done # slices

	done # disks
}

# f_device_get_all_network
#
# Get all network device information for attached network devices.
#
f_device_get_all_network()
{
	local devname desc flags
	for devname in $( ifconfig -l ); do
		# Eliminate network devices that don't make sense
		case "$devname" in
		lo*) continue ;;
		esac

		# Try and find its description
		f_device_desc "$devname" $DEVICE_TYPE_NETWORK desc

		f_dprintf "Found a network device named %s" "$devname"
		f_device_register $devname \
			"$desc" "$devname" $DEVICE_TYPE_NETWORK 1 \
			f_media_init_network "" f_media_shutdown_network "" -1

		# Set flags based on media and status
		flags=0
		eval "$( ifconfig $devname 2> /dev/null | awk -v var=flags '
		function _or(var, mask) {
			printf "%s=$(( $%s | $%s ))\n", var, var, mask
		}
		BEGIN { S = "[[:space:]]+" }
		{
			if (!match($0, "^" S "(media|status):" S)) next
			value = substr($0, RLENGTH + 1)
			if ($1 == "media:") {
				if (value ~ /Ethernet/) _or(var, "IF_ETHERNET")
				if (value ~ /802\.11/) _or(var, "IF_WIRELESS")
			} else if ($1 == "status:") {
				if (value ~ /^active/) _or(var, "IF_ACTIVE")
			}
		}' )"
		device_$devname set flags $flags
	done
}

# f_device_name_get $type $name type|desc|max [$var_to_set]
#
# Fetch the device type (type), description (desc), or maximum number of
# devices to scan for (max) associated with device $name and $type. If $type is
# either NULL, missing, or set to $DEVICE_TYPE_ANY then only $name is used.
# Returns success if a match was found, otherwise failure.
#
# If $var_to_set is missing or NULL, the device name is printed to standard out
# for capturing in a sub-shell (which is less-recommended because of
# performance degredation; for example, when called in a loop).
#
f_device_name_get()
{
	local __type="$1" __name="$2" __prop="$3" __var_to_set="$4"
	local __dev __devtype __n=0

	# Return failure if no $name or $prop is an unknown property
	[ "$__name" ] || return $FAILURE
	case "$__prop" in type|desc|max) : good ;;
	*) return $FAILURE; esac

	#
	# Attempt to create an alternate-form of $__name that contains the
	# first contiguous string of numbers replaced with `%d' for comparison
	# against stored pattern names (see MAIN).
	#
	local __left="${__name%%[0-9]*}" __right="${__name#*[0-9]}" __dname=
	if [ "$__left" != "$__name" ]; then
		# Chop leading digits from right 'til we hit first non-digit
		while :; do
			case "$__right" in
			[0-9]*) __right="${__right#[0-9]}" ;;
			     *) break
			esac
		done
		__dname="${__left}%d$__right"
	fi

	[ "$__type" = "$DEVICE_TYPE_ANY" ] && __type=
	for __dev in $DEVICE_NAMES; do
		__n=$(( $__n + 1 ))
		[ "$__dev" = "$__name" -o "$__dev" = "$__dname" ] || continue
		f_getvar _device_type$__n __devtype
		[ "${__type:-$__devtype}" = "$__devtype" ] || continue
		f_getvar _device_$__prop$__n $__var_to_set
		return $?
	done
	return $FAILURE
}

# f_device_name_set $type $name $desc [$max]
#
# Store a description (desc) and [optionally] maximum number of devices to scan
# for (max) in-association with device $type and $name. Returns success unless
# $name is NULL or missing. Use the f_device_name_get() routine with the same
# $name and optionally $type to retrieve one of type, desc, or max properties.
#
f_device_name_set()
{
	local type="$1" name="$2" desc="$3" max="$4"
	local dev devtype n=0 found=
	[ "$name" ] || return $FAILURE
	for dev in $DEVICE_NAMES; do
		n=$(( $n + 1 ))
		[ "$dev" = "$name" ] || continue
		if f_getvar _device_type$n devtype; then
			# Allow multiple entries with same name but diff type
			[ "$devtype" = "$type" ] || continue
		fi
		found=1 && break
	done
	if [ ! "$found" ]; then
		DEVICE_NAMES="$DEVICE_NAMES $name"
		n=$(( $n + 1 ))
	fi
	setvar _device_type$n "$type"
	setvar _device_desc$n "$desc"
	[ "${4+set}" ] && setvar _device_max$n "$max"
	return $SUCCESS
}

# f_device_desc $device_name $device_type [$var_to_set]
#
# Print a description for a device name (eg., `fxp0') given a specific device
# type/class.
#
# If $var_to_set is missing or NULL, the device description is printed to
# standard out for capturing in a sub-shell (which is less-recommended because
# of performance degredation; for example, when called in a loop).
#
f_device_desc()
{
	local __name="$1" __type="$2" __var_to_set="$3"
	local __devname __devunit __cp

	# Check variables
	[ "$__name" ] || return $SUCCESS
	[ "$__type" = "$DEVICE_TYPE_ANY" ] && type=
	[ "$__var_to_set" ] && { setvar "$__var_to_set" "" || return; }

	#
	# Return sysctl MIB dev.NAME.UNIT.%desc if it exists,
	# otherwise fall through to below static list.
	#
	if f_have sysctl; then
		__devname="${__name%%[0-9]*}"
		__devunit="${__name#$__devname}"
		__devunit="${__devunit%%[!0-9]*}"
		if [ "$__var_to_set" ]; then
			if __cp=$(
				sysctl -n "dev.$__devname.$__devunit.%desc" \
				2> /dev/null
			); then
				setvar "$__var_to_set" "$__cp" &&
					return $SUCCESS
			fi
		else
			sysctl -n "dev.$__devname.$__devunit.%desc" \
				2> /dev/null && return $SUCCESS
		fi
	fi

	#
	# For disks, attempt to return camcontrol(8) descriptions.
	# Otherwise fall through to below static list.
	#
	f_have camcontrol &&
	[ "${__type:-$DEVICE_TYPE_DISK}" = "$DEVICE_TYPE_DISK" ] &&
	__cp=$( camcontrol devlist 2> /dev/null | awk -v disk="$__name" '
		$0~"(\\(|,)"disk"(,|\\))" {
			if (!match($0, "<[^>]+>")) next
			print substr($0, RSTART+1, RLENGTH-2)
			found = 1
			exit
		}
		END { exit ! found }
	' ) && setvar "$__var_to_set" "$__cp" && return $SUCCESS

	#
	# Attempt to create an alternate-form of $__name that contains the
	# first contiguous string of numbers replaced with `%d' for comparison
	# against stored pattern names (see MAIN).
	#
	local __left="${__name%%[0-9]*}" __right="${__name#*[0-9]}" __dname=
	if [ "$__left" != "$__name" ]; then
		# Chop leading digits from right 'til we hit first non-digit
		while :; do
			case "$__right" in
			[0-9]*) __right="${__right#[0-9]}" ;;
			     *) break
			esac
		done
		__dname="${__left}%d$__right"
	fi

	local __dev __devtype __n=0
	for __dev in $DEVICE_NAMES; do
		__n=$(( $__n + 1 ))
		debug= f_getvar _device_type$__n __devtype
		[ "${__type:-$__devtype}" = "$__devtype" ] || continue
		if [ "$__devtype" = "$DEVICE_TYPE_NETWORK" ]; then
			__devname=$( f_substr "$__name" 0 ${#__dev} )
			[ "$__devname" = "$__dev" ] || continue
		else
			[ "$__dev" = "$__name" -o "$__dev" = "$__dname" ] ||
				continue
		fi
		debug= f_getvar _device_desc$__n $__var_to_set
		return $?
	done

	#
	# Sensible fall-backs for specific types
	#
	case "$__type" in
	$DEVICE_TYPE_CDROM)   __cp="<unknown cdrom device type>" ;;
	$DEVICE_TYPE_DISK)    __cp="<unknown disk device type>" ;;
	$DEVICE_TYPE_FLOPPY)  __cp="<unknown floppy device type>" ;;
	$DEVICE_TYPE_USB)     __cp="<unknown usb storage device type>" ;;
	$DEVICE_TYPE_NETWORK) __cp="<unknown network interface type>" ;;
	*)
		__cp="<unknown device type>"
	esac

	if [ "$__var_to_set" ]; then
		setvar "$__var_to_set" "$__cp"
	else
		echo "$__cp"
	fi

	return $FAILURE
}

# f_device_is_ethernet $device
#
# Returns true if $device is a wired Ethernet network interface. Otherwise
# returns false. Example wired interfaces include: fxp0 em0 bge0 rl0 etc.
#
f_device_is_ethernet()
{
	local dev="$1" type flags

	# Make sure we have an actual device by that name
	f_struct "device_$dev" || return $FAILURE

	# Make sure that the device is a network device
	device_$dev get type type
	[ "$type" = "$DEVICE_TYPE_NETWORK" ] || return $FAILURE

	# Make sure that the media flags indicate that it is Ethernet
	device_$dev get flags flags
	[ $(( ${flags:-0} & $IF_ETHERNET )) -eq $IF_ETHERNET ]
}

# f_device_is_wireless $device
#
# Returns true if $device is a Wireless network interface. Otherwise returns
# false. Examples of wireless interfaces include: iwn0
#
f_device_is_wireless()
{
	local dev="$1" type flags

	# Make sure we have an actual device by that name
	f_struct "device_$dev" || return $FAILURE

	# Make sure that the device is a network device
	device_$dev get type type
	[ "$type" = "$DEVICE_TYPE_NETWORK" ] || return $FAILURE

	# Make sure that the media flags indicate that it is Ethernet
	device_$dev get flags flags
	[ $(( ${flags:-0} & $IF_WIRELESS )) -eq $IF_WIRELESS ]
}

# f_device_is_active $device
#
# Returns true if $device is active. Otherwise returns false. Currently this
# only works for network interfaces.
#
f_device_is_active()
{
	local dev="$1" type flags=0

	# Make sure we have an actual device by that name
	f_struct "device_$dev" || return $FAILURE

	device_$dev get type type
	case "$type" in
	$DEVICE_TYPE_NETWORK)
		# Make sure that the media flags indicate that it is active
		device_$dev get flags flags
		[ $(( ${flags:-0} & $IF_ACTIVE )) -eq $IF_ACTIVE ]
		;;
	*)
		return $FAILURE
	esac
}

# f_device_rescan
#
# Rescan all devices, after closing previous set - convenience function.
#
f_device_rescan()
{
	f_device_reset
	f_device_get_all
}

# f_device_rescan_network
#
# Rescan all network devices, after closing previous set - for convenience.
#
f_device_rescan_network()
{
	f_device_reset_network
	f_device_get_all_network
}

# f_device_find $name [$type [$var_to_set]] 
#
# Find one or more registered devices by name, type, or both. Returns a space-
# separated list of devices matching the search criterion.
#
# If $var_to_set is missing or NULL, the device name(s) are printed to standard
# out for capturing in a sub-shell (which is less-recommended because of
# performance degredation; for example, when called in a loop).
#
f_device_find()
{
	local __name="$1" __type="${2:-$DEVICE_TYPE_ANY}" __var_to_set="$3"
	local __dev __devname __devtype __found=
	for __dev in $DEVICES; do
		device_$__dev get name __devname
		device_$__dev get type __devtype
		if [ "$__name" = "$__devname" -o ! "$__name" ] &&
		   [ "$__type" = "$DEVICE_TYPE_ANY" -o \
		     "$__type" = "$__devtype" ]
		then
			__found="$__found $__dev"
		fi
	done
	if [ "$__var_to_set" ]; then
		setvar "$__var_to_set" "${__found# }"
	else
		echo $__found
	fi
	[ "$__found" ] # Return status
}

# f_device_init $name
#
# Initialize a device by evaluating its `init' function.
#
f_device_init()
{
	local name="$1" init_func
	device_$name get init init_func || return $?
	${init_func:-:} $name
}

# f_device_get $name $file [$probe]
#
# Read $file by evaluating the device's `get' function. The file is commonly
# produced on standard output (but it truly depends on the function called).
#
f_device_get()
{
	local name="$1" file="$2" probe="$3" get_func
	device_$name get get get_func || return $?
	${get_func:-:} $name "$file" ${3+"$probe"}
}

# f_device_shutdown $name
#
# Shutdown a device by evaluating its `shutdown' function.
#
f_device_shutdown()
{
	local name="$1" shutdown_func
	device_$name get shutdown shutdown_func || return $?
	${shutdown_func:-:} $name
}

# f_device_menu $title $prompt $hline $device_type [$helpfile]
#
# Display a menu listing all the devices of a certain type in the system.
#
f_device_menu()
{
	f_dialog_title "$1"
	local title="$DIALOG_TITLE" btitle="$DIALOG_BACKTITLE"
	f_dialog_title_restore

	local prompt="$2" hline="$3" type="$4" helpfile="$5"

	local dev devtype devs=
	for dev in $DEVICES; do
		device_$dev get type devtype || continue
		[ "$devtype" = "$type" ] || continue
		devs="$devs $dev"
	done
	[ "$devs" ] || return $DIALOG_CANCEL

	local desc menu_list=
	for dev in $devs; do
		device_$dev get desc desc
		f_shell_escape "$desc" desc
		menu_list="$menu_list '$dev' '$desc'"
	done

	local height width rows
	eval f_dialog_menu_size height width rows \
	                        \"\$title\"  \
	                        \"\$btitle\" \
	                        \"\$prompt\" \
	                        \"\$hline\"  \
	                        $menu_list

	local errexit=
	case $- in *e*) errexit=1; esac
	set +e

	local mtag
	while :; do
		mtag=$( eval $DIALOG \
			--title \"\$title\"             \
			--backtitle \"\$btitle\"        \
			--ok-label \"\$msg_ok\"         \
			--cancel-label \"\$msg_cancel\" \
			${helpfile:+                    \
			  --help-button                 \
			  --help-label \"\$msg_help\"   \
			  ${USE_XDIALOG:+--help \"\"}   \
			}                               \
			--menu \"\$prompt\"             \
			$height $width $rows            \
			$menu_list                      \
			2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
		)
		local retval=$?

		[ $retval -ne $DIALOG_HELP ] && break
			# Otherwise, the Help button was pressed
		f_show_help "$helpfile"
			# ...then loop back to menu
	done
	f_dprintf "retval=%u mtag=[%s]" $retval "$mtag"

	[ "$errexit" ] && set -e

	if [ $retval -eq $DIALOG_OK ]; then
		# Clean up the output of [X]dialog(1) and return it
		f_dialog_data_sanitize mtag
		echo "$mtag" >&2
	fi

	return $retval
}

# f_device_capacity $device [$var_to_set]
#
# Return the capacity of $device in bytes.
#
f_device_capacity()
{
	local __dev="$1" __var_to_set="$2"
	local __bytes

	__bytes=$( diskinfo -v "$__dev" 2> /dev/null |
		awk '/# mediasize in bytes/{print $1}' ) || __bytes=-1

	if [ "$__var_to_set" ]; then
		setvar "$__var_to_set" "$__bytes"
	else
		echo "$__bytes"
	fi
}

#
# Short-hand
#
f_cdrom()   {  f_device_name_set $DEVICE_TYPE_CDROM   "$1" "$2" "$3";  }
f_disk()    {  f_device_name_set $DEVICE_TYPE_DISK    "$1" "$2" "$3";  }
f_floppy()  {  f_device_name_set $DEVICE_TYPE_FLOPPY  "$1" "$2" "$3";  }
f_serial()  {  f_device_name_set $DEVICE_TYPE_NETWORK "$1" "$2" "$3";  }
f_usb()     {  f_device_name_set $DEVICE_TYPE_USB     "$1" "$2" "$3";  }
f_network() {  f_device_name_set $DEVICE_TYPE_NETWORK "$1" "$2";       }

############################################################ MAIN

# CDROM, Disk, Floppy, Serial, and USB devices/names
f_cdrom  "cd%d"   "SCSI CDROM drive"                  4
f_cdrom  "mcd%d"  "Mitsumi (old model) CDROM drive"   4
f_cdrom  "scd%d"  "Sony CDROM drive - CDU31/33A type" 4
f_disk   "aacd%d" "Adaptec FSA RAID array"            4
f_disk   "ada%d"  "ATA/SATA disk device"              16
f_disk   "amrd%d" "AMI MegaRAID drive"                4
f_disk   "da%d"   "SCSI disk device"                  16
f_disk   "idad%d" "Compaq RAID array"                 4
f_disk   "ipsd%d" "IBM ServeRAID RAID array"          4
f_disk   "mfid%d" "LSI MegaRAID SAS array"            4
f_disk   "mlxd%d" "Mylex RAID disk"                   4
f_disk   "twed%d" "3ware ATA RAID array"              4
f_disk   "vtbd%d" "VirtIO Block Device"               16
f_floppy "fd%d"   "Floppy Drive unit A"               4
f_serial "cuau%d" "%s on device %s (COM%d)"           16
f_usb    "da%da"  "USB Mass Storage Device"           16

# Network interfaces/names
f_network "ae"    "Attansic/Atheros L2 Fast Ethernet"
f_network "age"   "Attansic/Atheros L1 Gigabit Ethernet"
f_network "alc"   "Atheros AR8131/AR8132 PCIe Ethernet"
f_network "ale"   "Atheros AR8121/AR8113/AR8114 PCIe Ethernet"
f_network "an"    "Aironet 4500/4800 802.11 wireless adapter"
f_network "ath"   "Atheros IEEE 802.11 wireless adapter"
f_network "aue"   "ADMtek USB Ethernet adapter"
f_network "axe"   "ASIX Electronics USB Ethernet adapter"
f_network "bce"   "Broadcom NetXtreme II Gigabit Ethernet card"
f_network "bfe"   "Broadcom BCM440x PCI Ethernet card"
f_network "bge"   "Broadcom BCM570x PCI Gigabit Ethernet card"
f_network "bm"    "Apple BMAC Built-in Ethernet"
f_network "bwn"   "Broadcom BCM43xx IEEE 802.11 wireless adapter"
f_network "cas"   "Sun Cassini/Cassini+ or NS DP83065 Saturn Ethernet"
f_network "cc3i"  "SDL HSSI sync serial PCI card"
f_network "cue"   "CATC USB Ethernet adapter"
f_network "cxgb"  "Chelsio T3 10Gb Ethernet card"
f_network "dc"    "DEC/Intel 21143 (and clones) PCI Fast Ethernet card"
f_network "de"    "DEC DE435 PCI NIC or other DC21040-AA based card"
f_network "disc"  "Software discard network interface"
f_network "ed"    "Novell NE1000/2000; 3C503; NE2000-compatible PCMCIA"
f_network "el"    "3Com 3C501 Ethernet card"
f_network "em"    "Intel(R) PRO/1000 Ethernet card"
f_network "en"    "Efficient Networks ATM PCI card"
f_network "ep"    "3Com 3C509 Ethernet card/3C589 PCMCIA"
f_network "et"    "Agere ET1310 based PCI Express Gigabit Ethernet card"
f_network "ex"    "Intel EtherExpress Pro/10 Ethernet card"
f_network "fe"    "Fujitsu MB86960A/MB86965A Ethernet card"
f_network "fpa"   "DEC DEFPA PCI FDDI card"
f_network "fwe"   "FireWire Ethernet emulation"
f_network "fwip"  "IP over FireWire"
f_network "fxp"   "Intel EtherExpress Pro/100B PCI Fast Ethernet card"
f_network "gem"   "Apple GMAC or Sun ERI/GEM Ethernet adapter"
f_network "hme"   "Sun HME (Happy Meal Ethernet) Ethernet adapter"
f_network "ie"    "AT&T StarLAN 10 and EN100; 3Com 3C507; NI5210"
f_network "igb"   "Intel(R) PRO/1000 PCI Express Gigabit Ethernet card"
f_network "ipw"   "Intel PRO/Wireless 2100 IEEE 802.11 adapter"
f_network "iwi"   "Intel PRO/Wireless 2200BG/2225BG/2915ABG adapter"
f_network "iwn"   "Intel Wireless WiFi Link 4965AGN IEEE 802.11n adapter"
f_network "ixgbe" "Intel(R) PRO/10Gb Ethernet card"
f_network "ixgb"  "Intel(R) PRO/10Gb Ethernet card"
f_network "ix"    "Intel Etherexpress Ethernet card"
	# Maintain sequential order of above(3): ixgbe ixgb ix
f_network "jme"   "JMicron JMC250 Gigabit/JMC260 Fast Ethernet"
f_network "kue"   "Kawasaki LSI USB Ethernet adapter"
f_network "le"    "AMD Am7900 LANCE or Am79C9xx PCnet Ethernet adapter"
f_network "lge"   "Level 1 LXT1001 Gigabit Ethernet card"
f_network "lnc"   "Lance/PCnet (Isolan/Novell NE2100/NE32-VL) Ethernet"
f_network "lo"    "Loop-back (local) network interface"
f_network "lp"    "Parallel Port IP (PLIP) peer connection"
f_network "malo"  "Marvell Libertas 88W8335 802.11 wireless adapter"
f_network "msk"   "Marvell/SysKonnect Yukon II Gigabit Ethernet"
f_network "mxge"  "Myricom Myri10GE 10Gb Ethernet card"
f_network "nfe"   "NVIDIA nForce MCP Ethernet"
f_network "nge"   "NatSemi PCI Gigabit Ethernet card"
f_network "ng"    "Vimage netgraph(4) bridged Ethernet device"
	# Maintain sequential order of above(2): nge ng
f_network "nve"   "NVIDIA nForce MCP Ethernet"
f_network "nxge"  "Neterion Xframe 10GbE Server/Storage adapter"
f_network "pcn"   "AMD Am79c79x PCI Ethernet card"
f_network "plip"  "Parallel Port IP (PLIP) peer connection"
f_network "ral"   "Ralink Technology IEEE 802.11 wireless adapter"
f_network "ray"   "Raytheon Raylink 802.11 wireless adapter"
f_network "re"    "RealTek 8139C+/8169/8169S/8110S PCI Ethernet adapter"
f_network "rl"    "RealTek 8129/8139 PCI Ethernet card"
f_network "rue"   "RealTek USB Ethernet card"
f_network "rum"   "Ralink Technology USB IEEE 802.11 wireless adapter"
f_network "sf"    "Adaptec AIC-6915 PCI Ethernet card"
f_network "sge"   "Silicon Integrated Systems SiS190/191 Ethernet"
f_network "sis"   "SiS 900/SiS 7016 PCI Ethernet card"
f_network "sk"    "SysKonnect PCI Gigabit Ethernet card"
f_network "snc"   "SONIC Ethernet card"
f_network "sn"    "SMC/Megahertz Ethernet card"
	# Maintain sequential order of above(2): snc sn
f_network "sr"    "SDL T1/E1 sync serial PCI card"
f_network "ste"   "Sundance ST201 PCI Ethernet card"
f_network "stge"  "Sundance/Tamarack TC9021 Gigabit Ethernet"
f_network "ti"    "Alteon Networks PCI Gigabit Ethernet card"
f_network "tl"    "Texas Instruments ThunderLAN PCI Ethernet card"
f_network "txp"   "3Com 3cR990 Ethernet card"
f_network "tx"    "SMC 9432TX Ethernet card"
	# Maintain sequential order of above(2): txp tx
f_network "uath"  "Atheros AR5005UG and AR5005UX USB wireless adapter"
f_network "upgt"  "Conexant/Intersil PrismGT USB wireless adapter"
f_network "ural"  "Ralink Technology RT2500USB 802.11 wireless adapter"
f_network "urtw"  "Realtek 8187L USB wireless adapter"
f_network "vge"   "VIA VT612x PCI Gigabit Ethernet card"
f_network "vlan"  "IEEE 802.1Q VLAN network interface"
f_network "vr"    "VIA VT3043/VT86C100A Rhine PCI Ethernet card"
f_network "vx"    "3COM 3c590 / 3c595 Ethernet card"
f_network "wb"    "Winbond W89C840F PCI Ethernet card"
f_network "wi"    "Lucent WaveLAN/IEEE 802.11 wireless adapter"
f_network "wpi"   "Intel 3945ABG IEEE 802.11 wireless adapter"
f_network "wx"    "Intel Gigabit Ethernet (82452) card"
f_network "xe"    "Xircom/Intel EtherExpress Pro100/16 Ethernet card"
f_network "xl"    "3COM 3c90x / 3c90xB PCI Ethernet card"
f_network "zyd"   "ZyDAS ZD1211/ZD1211B USB 802.11 wireless adapter"

f_count NDEVICES $DEVICE_NAMES
f_dprintf "%s: Initialized %u known device names/descriptions." device.subr \
	  $NDEVICES

#
# Scan for the above devices unless requeted otherwise
#
f_dprintf "%s: DEVICE_SELF_SCAN_ALL=[%s]" device.subr "$DEVICE_SELF_SCAN_ALL"
case "$DEVICE_SELF_SCAN_ALL" in
""|0|[Nn][Oo]|[Oo][Ff][Ff]|[Ff][Aa][Ll][Ss][Ee]) : do nothing ;;
*) f_device_get_all
esac

f_dprintf "%s: Successfully loaded." device.subr

fi # ! $_DEVICE_SUBR