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 # Setup the locking
  32 LOCKFILE="${LOCK_DIR}/.network-rename-lock"
  33
  34 # Check if the INTERFACE variable is properly set.
  35 assert isset INTERFACE
  36
  37 # Log what we are doing here.
  38 log DEBUG "Called for INTERFACE='${INTERFACE}'"
  39
  40 # Check if the device is already in use and
  41 # prevent the script to touch it in any way.
  42 if ! device_is_free ${INTERFACE}; then
  43         log ERROR "The device '${INTERFACE}' is in use"
  44         exit ${EXIT_ERROR}
  45 fi
  46
  47 # Everything is wrapped into a function so that we can use locking on it
  48 main() {
  49         # Determine the type of the device and then see what
  50         # we need to do with it.
  51         local type="$(device_get_type "${INTERFACE}")"
  52
  53         log DEBUG "Interface '${INTERFACE}' is of type '${type}'"
  54
  55         case "${type}" in
  56                 ethernet)
  57                         # Search within all the port configurations
  58                         # if this port has already been configured.
  59                         local port
  60                         for port in $(ports_get_all); do
  61                                 port_cmd hotplug_rename "${port}" "${INTERFACE}" &>/dev/null
  62                                 if [ $? -eq ${EXIT_TRUE} ]; then
  63                                         echo "${port}"
  64                                         exit ${EXIT_OK}
  65                                 fi
  66                         done
  67
  68                         # If no port configuration could be found,
  69                         # we search for the next unused name and return that.
  70                         port=$(port_find_free ${PORT_PATTERN})
  71                         echo "${port}"
  72
  73                         log DEBUG "Could not find an existing port configuration for '${INTERFACE}'"
  74                         log DEBUG "Renaming interface '${INTERFACE}' to '${port}'"
  75                         ;;
  76         esac
  77
  78         return ${EXIT_OK}
  79 }
  80
  81 # Run perform rename function exclusively
  82 lock "${RUN_DIR}/.network-rename-lock" main || exit $?