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="${RUN_DIR}/.rename_lock"
  33 function cleanup() {
  34         lock_release ${LOCKFILE}
  35 }
  36 trap cleanup EXIT TERM KILL
  37
  38 # Check if the INTERFACE variable is properly set.
  39 assert isset INTERFACE
  40
  41 # Log what we are doing here.
  42 log DEBUG "Called for interface '${INTERFACE}'."
  43
  44 # Just check if the device has already vanished.
  45 device_exists ${INTERFACE} || exit ${EXIT_ERROR}
  46
  47 # Acquiring lock for this operation.
  48 lock_acquire ${LOCKFILE}
  49
  50 # Check if the device is already in use and
  51 # prevent the script to touch it in any way.
  52 if ! device_is_free ${INTERFACE}; then
  53         log ERROR "The device '${INTERFACE}' is in use."
  54         exit ${EXIT_ERROR}
  55 fi
  56
  57 # Determine the type of the device and then see what
  58 # we need to do with it.
  59 type=$(device_get_type ${INTERFACE})
  60 log DEBUG "Interface '${INTERFACE}' is of type '${type}'."
  61
  62 case "${type}" in
  63         ethernet)
  64                 # Search within all the port configurations
  65                 # if this port has already been configured.
  66                 for port in $(ports_get_all); do
  67                         port_cmd hotplug_rename ${port} ${INTERFACE} &>/dev/null
  68                         if [ $? -eq ${EXIT_TRUE} ]; then
  69                                 echo "${port}"
  70                                 exit ${EXIT_OK}
  71                         fi
  72                 done
  73
  74                 # If no port configuration could be found,
  75                 # we search for the next unused name and return that.
  76                 port=$(port_find_free ${PORT_PATTERN})
  77                 echo "${port}"
  78
  79                 log DEBUG "Could not find an existing port configuration for '${INTERFACE}'"
  80                 log DEBUG "Renaming interface '${INTERFACE}' to '${port}'"
  81                 ;;
  82 esac
  83
  84 exit ${EXIT_OK}