debian/ifupdown.init

   1 #!/bin/sh -e
   2 ### BEGIN INIT INFO
   3 # Provides:          ifupdown
   4 # Required-Start:    ifupdown-clean
   5 # Required-Stop:     $local_fs
   6 # Default-Start:     S
   7 # Default-Stop:      0 6
   8 # Short-Description: Prepare the system for taking up interfaces.
   9 ### END INIT INFO
  10
  11 [ -x /sbin/ifup ] || exit 0
  12 [ -x /sbin/ifdown ] || exit 0
  13
  14 MYNAME="${0##*/}"
  15 report() { echo "${MYNAME}: $*" ; }
  16 report_err() { report "Error: $*" >&2 ; }
  17 RUN_DIR=/etc/network/run
  18 [ -r /etc/default/ifupdown ] && . /etc/default/ifupdown
  19
  20 # Note: The state file location is hardcoded in ifup|ifdown
  21 IFSTATE=/etc/network/run/ifstate
  22
  23 myreadlink () {
  24   dest="${1%/}"
  25   extras=""
  26
  27   while [ "$dest" != "" ]; do
  28     if [ -d "$dest" ]; then
  29       cd "$dest"
  30       dest=$(/bin/pwd)
  31       break
  32     fi
  33
  34     if [ -L "$dest" ]; then
  35       d2=$(readlink "$dest")
  36       if [ "${d2#/}" = "$d2" ]; then
  37         dest="${dest%/*}/$d2"
  38       else
  39         dest="$d2"
  40       fi
  41     fi
  42
  43     while [ ! -e "$dest" ]; do
  44       extras="${dest##*/}/$extras"
  45       if [ "${extras%%/*}" = ".." ]; then return 1; fi
  46       destx="${dest%/*}"
  47       if [ "$destx" = "$dest" ]; then destx=""; fi
  48       dest="$destx"
  49     done
  50   done
  51   dest="$dest/$extras"
  52   echo "${dest%/}"
  53 }
  54
  55 case "$1" in
  56   start|restart)
  57     if [ "$2" ]; then
  58       report_err "Arguments to '$1' command not accepted"
  59       exit 3
  60     fi
  61     echo -n "Setting up networking..."
  62
  63     # if /etc/network/run is a symlink to a directory that doesn't exist,
  64     # create it.
  65
  66     if [ -L "$RUN_DIR" ] && [ ! -d "$RUN_DIR" ] ; then
  67       runmkdir="$(myreadlink "$RUN_DIR")"
  68       if [ ! "$runmkdir" ] ; then
  69         echo "failed."
  70         report_err "Cannot create target of /etc/network/run"
  71         exit 1
  72       fi
  73       if ! mkdir -p "$runmkdir"; then
  74         echo "failed."
  75         report_err "Failure creating directory $runmkdir"
  76         exit 1
  77       fi
  78     fi
  79
  80     # Create the state file
  81     # Doing this also signals that ifupdown is available for use
  82     if [ ! -r "$IFSTATE" ]; then
  83       if ! : > "$IFSTATE" ; then
  84         echo "failed."
  85         report_err "Failure initializing $IFSTATE"
  86         exit 1
  87       fi
  88     fi
  89
  90     echo "done."
  91     exit 0
  92     ;;
  93
  94   stop)
  95     if [ "$2" ]; then
  96       report_err "Arguments to '$1' command not accepted"
  97       exit 3
  98     fi
  99     if [ -x /etc/init.d/ifupdown-clean ]; then
 100       /etc/init.d/ifupdown-clean start
 101     fi
 102     ;;
 103
 104   force-reload)
 105     ;;
 106
 107   *)
 108     echo "Usage: $0 {start|stop|restart|force-reload}" >&2
 109     exit 3
 110     ;;
 111 esac
 112
 113 exit 0