src/udev/network-hotplug-rename

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2011  Michael Tremer & Christian Schmidt                      #
   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 # Setup logging.
  23 LOG_FACILITY="network-hotplug-rename"
  24 LOG_DISABLE_STDOUT="true"
  25
  26 . /usr/lib/network/functions
  27
  28 # Read network settings
  29 network_settings_read
  30
  31 # Check if the INTERFACE variable is properly set.
  32 assert isset INTERFACE
  33
  34 # Log what we are doing here.
  35 log DEBUG "Called for INTERFACE='${INTERFACE}'"
  36
  37 # Check if the device is already in use and
  38 # prevent the script to touch it in any way.
  39 if ! device_is_free ${INTERFACE}; then
  40         log ERROR "The device '${INTERFACE}' is in use"
  41         exit ${EXIT_ERROR}
  42 fi
  43
  44 # Everything is wrapped into a function so that we can use locking on it
  45 main() {
  46         # Check if the device has a unique MAC address (which is
  47         # what are using to uniquely identify an interface)
  48         local address="$(device_get_address "${INTERFACE}")"
  49         if isset address && [ "${address}" = "00:00:00:00:00:00" ]; then
  50                 log DEBUG "Ignoring interface ${INTERFACE} with invalid MAC address ${address}"
  51                 return ${EXIT_OK}
  52         fi
  53
  54         # Determine the type of the device and then see what
  55         # we need to do with it.
  56         local type="$(device_get_type "${INTERFACE}")"
  57
  58         log DEBUG "Interface '${INTERFACE}' is of type '${type}'"
  59
  60         case "${type}" in
  61                 ethernet)
  62                         # Search within all the port configurations
  63                         # if this port has already been configured.
  64                         local port
  65                         for port in $(ports_get_all); do
  66                                 port_cmd hotplug_rename "${port}" "${INTERFACE}" &>/dev/null
  67                                 if [ $? -eq ${EXIT_TRUE} ]; then
  68                                         print "${port}"
  69                                         exit ${EXIT_OK}
  70                                 fi
  71                         done
  72
  73                         # Could not find a valid port configuration, creating a new one
  74                         port="$(port_find_free "${PORT_PATTERN}")"
  75                         assert isset port
  76
  77                         # Create a new port configuration with the new name
  78                         if ! port_new "ethernet" "${port}" "${INTERFACE}"; then
  79                                 log ERROR "Could not create new port configuration for ${INTERFACE}"
  80                                 return ${EXIT_ERROR}
  81                         fi
  82
  83                         print "${port}"
  84                         ;;
  85         esac
  86
  87         return ${EXIT_OK}
  88 }
  89
  90 # Run perform rename function exclusively
  91 lock "${RUN_DIR}/.network-rename-lock" main || exit $?