#!/bin/sh
#
# Copyright (c) 2022-2023, Jesús Daniel Colmenares Oviedo <DtxdF@disroot.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * 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.
#
# * Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.

. "${AJ_CONFIG}"
. "${LIBDIR}/load"

lib_load "${LIBDIR}/log"
lib_load "${LIBDIR}/check_func"
lib_load "${LIBDIR}/replace"
lib_load "${LIBDIR}/jail"

# Constants
MOUNT_OPTION_DEVICE=1
MOUNT_OPTION_MOUNTPOINT=2
MOUNT_OPTION_TYPE=3
MOUNT_OPTION_OPTIONS=4
MOUNT_OPTION_DUMP=5
MOUNT_OPTION_PASS=6

main()
{
	local args="$1"
	if lib_check_empty "${args}"; then
		lib_err - "usage: MOUNT --nopersist <device> <mountpoint> [<type>] [<options>] [<dump>] [<pass>]"
		lib_err - "       MOUNT [--nomount] [--nro [auto|<nro>]] <device> <mountpoint> [<type>] [<options>]"
		lib_err - "               [<dump>] [<dump>]"
		exit ${EX_USAGE}
	fi
	
	# options
	local automount=1
	local persist=1
	local nro="auto"

	# mount options
	local device=
	local mountpoint=
	local type="nullfs"
	local options="rw"
	local dump=0
	local pass=0

	# Arguments
	local args_list
	local total_items
	local current_index=0

	args_list=`lib_split_jailparams "${args}"` || exit $?
	total_items=`printf "%s\n" "${args_list}" | wc -l`
	
	while [ ${current_index} -lt ${total_items} ]; do 
		current_index=$((current_index+1))
		local arg=`printf "%s\n" "${args_list}" | head -${current_index} | tail -n 1`
		if lib_check_empty "${arg}"; then
			continue
		fi

		local optarg=
		case "${arg}" in
			--nro)
				current_index=$((current_index+1))
				if [ ${current_index} -eq ${total_items} ]; then
					main # usage
				fi

				optarg=`printf "%s\n" "${args_list}" | head -${current_index} | tail -n 1`
				if lib_check_empty "${optarg}"; then
					main # usage
				fi
				;;
		esac

		case "${arg}" in
			--nomount)
				automount=0
				;;
			--nopersist)
				persist=0
				;;
			--nro)
				nro="${optarg}"
				;;
			--)
				break
				;;
			--*)
				main # usage
				;;
			*)
				break
				;;
		esac
	done
	current_index=$((current_index-1))

	local escape_chars
	escape_chars='`"\'

	local option=0
	while [ ${current_index} -lt ${total_items} ]; do 
		option=$((option+1))
		current_index=$((current_index+1))

		local arg=`printf "%s\n" "${args_list}" | head -${current_index} | tail -n 1`

		if lib_check_empty "${arg}"; then
			lib_err ${EX_DATAERR} "An empty field cannot be used in MOUNT."
		fi

		if [ ${option} -eq ${MOUNT_OPTION_DEVICE} ]; then
			device="${arg}"
		elif [ ${option} -eq ${MOUNT_OPTION_MOUNTPOINT} ]; then
			mountpoint="${arg}"
		elif [ ${option} -eq ${MOUNT_OPTION_TYPE} ]; then
			type="${arg}"
		elif [ ${option} -eq ${MOUNT_OPTION_OPTIONS} ]; then
			options="${arg}"
		elif [ ${option} -eq ${MOUNT_OPTION_DUMP} ]; then
			dump="${arg}"
		elif [ ${option} -eq ${MOUNT_OPTION_PASS} ]; then
			pass="${arg}"
		else
			break
		fi
	done

	if [ -z "${device}" -o -z "${mountpoint}" ]; then
		main # usage
	fi

	if ! lib_check_number "${dump}"; then
		lib_err ${EX_DATAERR} "DUMP must be a number!"
	fi

	if ! lib_check_number "${pass}"; then
		lib_err ${EX_DATAERR} "PASS must be a number!"
	fi

	device=`lib_escape_string "${device}" "" "${escape_chars}"`
	mountpoint=`lib_escape_string "${mountpoint}" "" "${escape_chars}"`
	type=`lib_escape_string "${type}" "" "${escape_chars}"`
	options=`lib_escape_string "${options}" "" "${escape_chars}"`

	if [ ${persist} -eq 1 ]; then
		nro=`lib_escape_string "${nro}" "" "${escape_chars}"`
		dump=`lib_escape_string "${dump}" "" "${escape_chars}"`
		pass=`lib_escape_string "${pass}" "" "${escape_chars}"`

		echo "\"\${APPJAIL_SCRIPT}\" fstab jail \"\${APPJAIL_JAILNAME}\" set -n \"${nro}\" -d \"${device}\" -m \"${mountpoint}\" -t \"${type}\" -o \"${options}\" -D \"${dump}\" -P \"${pass}\""
		if [ ${automount} -eq 1 ]; then
			echo "\"\${APPJAIL_SCRIPT}\" fstab jail \"\${APPJAIL_JAILNAME}\" compile"
			echo "\"\${APPJAIL_SCRIPT}\" fstab jail \"\${APPJAIL_JAILNAME}\" mount -a"
		fi
	else
		echo "mount -t \"${type}\" -o \"${options}\" -- \"${device}\" \"\${APPJAIL_JAILDIR}/${mountpoint}\""
	fi
}

main "$@"
