functions.serial

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012  IPFire Network Development Team                         #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 # This is a list of baudrates that are supported.
  23 SERIAL_BAUDRATES="921600 460800 230400 115200 57600 38400 19200 9600"
  24
  25 function serial_exists() {
  26         local device=${1}
  27
  28         [ -c "${device}" ]
  29 }
  30
  31 function serial_is_locked() {
  32         local device=${1}
  33         assert isset device
  34
  35         device=$(basename ${device})
  36
  37         local dir
  38         for dir in /var/lock /var/lock/ppp; do
  39                 [ -e "${dir}/LCK..${device}" ] \
  40                         && return ${EXIT_TRUE}
  41         done
  42
  43         return ${EXIT_FALSE}
  44 }
  45
  46 function serial_is_unlocked() {
  47         serial_is_locked ${device} \
  48                 && return ${EXIT_FALSE} || return ${EXIT_TRUE}
  49 }
  50
  51 function serial_is_modem() {
  52         local device=${1}
  53         assert isset device
  54
  55         modem_chat --timeout=2 "${device}" "AT" &>/dev/null
  56         local ret=$?
  57
  58         case "${ret}" in
  59                 ${EXIT_OK})
  60                         return ${EXIT_TRUE}
  61                         ;;
  62                 ${EXIT_ERROR})
  63                         return ${EXIT_FALSE}
  64                         ;;
  65                 *)
  66                         return ${EXIT_UNKNOWN}
  67                         ;;
  68         esac
  69 }
  70
  71 function serial_get_bus_type() {
  72         local device="${1}"
  73         assert isset device
  74
  75         case "${device}" in
  76                 /dev/ttyUSB*)
  77                         print "usb"
  78                         return ${EXIT_OK}
  79                         ;;
  80         esac
  81
  82         print "unknown"
  83         return ${EXIT_ERROR}
  84 }