#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2012  IPFire Network Development Team                         #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program is distributed in the hope that it will be useful,             #
# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
# GNU General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

# This is a list of baudrates that are supported.
SERIAL_BAUDRATES="921600 460800 230400 115200 57600 38400 19200 9600"

function serial_exists() {
	local device=${1}

	[ -c "${device}" ]
}

function serial_is_locked() {
	local device=${1}
	assert isset device

	device=$(basename ${device})

	local dir
	for dir in /var/lock /var/lock/ppp; do
		[ -e "${dir}/LCK..${device}" ] \
			&& return ${EXIT_TRUE}
	done

	return ${EXIT_FALSE}
}

function serial_is_unlocked() {
	serial_is_locked ${device} \
		&& return ${EXIT_FALSE} || return ${EXIT_TRUE}
}

function serial_is_modem() {
	local device=${1}
	assert isset device

	modem_chat --timeout=2 "${device}" "AT" &>/dev/null
	local ret=$?

	case "${ret}" in
		${EXIT_OK})
			return ${EXIT_TRUE}
			;;
		${EXIT_ERROR})
			return ${EXIT_FALSE}
			;;
		*)
			return ${EXIT_UNKNOWN}
			;;
	esac
}