if [ ! "$_MEDIA_USB_SUBR" ]; then _MEDIA_USB_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..." media/usb.subr
f_include $BSDCFG_SHARE/device.subr
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/media/common.subr
f_include $BSDCFG_SHARE/struct.subr
f_include $BSDCFG_SHARE/variable.subr

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

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

USB_MOUNTED=

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

# f_media_set_usb
#
# Attempt to use USB as the media type. Return success if we both found and set
# the media type to be a USB drive.
#
f_media_set_usb()
{
	f_media_close

	local devs ndevs
	f_device_find "" $DEVICE_TYPE_USB devs
	ndevs=$( set -- $devs; echo $# )

	if [ ${ndevs:=0} -eq 0 ]; then
		f_show_msg "$msg_no_usb_devices_found"
		return $FAILURE
	elif [ $ndevs -gt 1 ]; then
		local title="$msg_choose_a_usb_drive"
		local prompt="$msg_please_select_a_usb_drive"
		local hline=""

		local dev retval
		dev=$( f_device_menu \
			"$title" "$prompt" "$hline" $DEVICE_TYPE_USB \
			2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD )
		retval=$?
		[ "$dev" ] || return $FAILURE

		f_device_find "$dev" $DEVICE_TYPE_USB devs
		[ "$devs" ] || return $FAILURE
		dev="${devs%%[$IFS]*}"

		f_struct_copy device_$dev device_media
		[ $retval -eq $SUCCESS ] || return $FAILURE
	else
		f_struct_copy device_$devs device_media
	fi

	f_struct device_media &&
		device_media unset private

	if f_interactive; then
		local name
		f_struct device_media get name name
		f_show_msg "$msg_using_usb_device" "$name"
	fi

	f_struct device_media || return $FAILURE
}

# f_media_init_usb $device
#
# Initializes the USB media device. Returns success if able to mount the USB
# disk device using mount(8).
#
f_media_init_usb()
{
	local dev="$1" devname err

	device_$dev get devname devname || return $FAILURE
	f_dprintf "Init routine called for USB device. devname=[%s]" \
	          "$devname"

	if [ "$USB_MOUNTED" ]; then
		f_dprintf "USB device already mounted."
		return $SUCCESS
	fi

	if [ ! -e "$MOUNTPOINT" ] &&
	   ! err=$( mkdir -p "$MOUNTPOINT" 2>&1 )
	then
		f_dialog_msgbox "$err"
		return $FAILURE
	fi

	if err=$( mount "$devname" "$MOUNTPOINT" 2>&1 ); then
		USB_MOUNTED=1
		return $SUCCESS
	fi

	err="${err#mount: }"; err="${err#$devname: }"
	f_show_msg "$msg_error_mounting_usb_drive" \
	           "$devname" "$MOUNTPOINT" "$err"
	return $FAILURE
}

# f_media_get_usb $device $file [$probe_only]
#
# Returns data from $file on a mounted USB disk device. Similar to cat(1).
# If $probe_only is present and non-NULL, returns success if $file exists.
#
f_media_get_usb()
{
	local dev="$1" file="$2" probe_only="$3"

	f_dprintf "f_media_get_usb: dev=[%s] file=[%s] probe_only=%s" \
	          "$dev" "$file" "$probe_only"

	f_media_generic_get "$MOUNTPOINT" "$file" "$probe_only"
}

# f_media_shutdown_usb $device
#
# Shuts down the USB disk device using umount(8). Return status should be
# ignored.
#
f_media_shutdown_usb()
{
	local dev="$1" err

	[ "$USB_MOUNTED" ] || return

	if ! err=$( umount -f "$MOUNTPOINT" 2>&1 ); then
		err="${err#umount: }"; err="${err#*: }"
		f_show_msg "$msg_could_not_unmount_the_ufs_partition" \
		           "$MOUNTPOINT" "$err"
	else
		USB_MOUNTED=
	fi
}

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

f_dprintf "%s: Successfully loaded." media/usb.subr

fi # ! $_MEDIA_USB_SUBR