modules/stretch/files/wait-online.sh

   1 #!/bin/sh
   2 # from busters's ifupdown 0.8.32 package (as of May 2018)
   3 set -e
   4
   5 WAIT_ONLINE_METHOD="ifup"
   6 WAIT_ONLINE_IFACE=""
   7 WAIT_ONLINE_ADDRESS=""
   8 WAIT_ONLINE_TIMEOUT=300
   9
  10 [ -f /etc/default/networking ] && . /etc/default/networking
  11
  12 case "$WAIT_ONLINE_METHOD" in
  13 route)
  14         [ -n "$WAIT_ONLINE_ADDRESS" ] || WAIT_ONLINE_ADDRESS=default
  15         (/usr/bin/timeout "$WAIT_ONLINE_TIMEOUT" /bin/ip mon r & /bin/ip -4 r s; /bin/ip -6 r s) | /bin/grep -q "^$WAIT_ONLINE_ADDRESS\>"
  16         ;;
  17
  18 ping)
  19         if [ -z "$WAIT_ONLINE_ADDRESS" ]; then
  20                 echo "No WAIT_ONLINE_ADDRESS specified" >&2
  21                 exit 1
  22         fi
  23         /bin/ping -q -c 1 -w "WAIT_ONLINE_TIMEOUT" "$WAIT_ONLINE_ADDRESS" >/dev/null
  24         ;;
  25
  26 ping6)
  27         /bin/ping6 -q -c 1 -w "WAIT_ONLINE_TIMEOUT" "$WAIT_ONLINE_ADDRESS" >/dev/null
  28         ;;
  29
  30 ifup|iface|interface)
  31         up=false
  32         if [ -z "$WAIT_ONLINE_IFACE" ]; then
  33                 auto_list="$(/sbin/ifquery -X lo --list)"
  34                 hotplug_list="$(/sbin/ifquery -X lo --allow=hotplug --list)"
  35                 if [ -n "$auto_list" ]; then
  36                         for i in $(seq 1 $WAIT_ONLINE_TIMEOUT); do
  37                                 up=true
  38                                 for iface in $auto_list; do
  39                                         if ! /sbin/ifquery --state $iface >/dev/null; then
  40                                                 up=false
  41                                                 break
  42                                         fi
  43                                 done
  44                                 if [ $up = true ]; then
  45                                         break
  46                                 fi
  47                                 sleep 1
  48                         done
  49                 elif [ -n "$(/sbin/ifquery --allow=hotplug --list)" ]; then
  50                         for i in $(seq 1 $WAIT_ONLINE_TIMEOUT); do
  51                                 if [ -n "$(/sbin/ifquery -X lo --allow=hotplug --state)" ]; then
  52                                         up=true
  53                                         break
  54                                 fi
  55                                 sleep 1
  56                         done
  57                 else
  58                         exit 0
  59                 fi
  60         else
  61                 for i in $(seq 1 $WAIT_ONLINE_TIMEOUT); do
  62                         if [ -n "$(/sbin/ifquery --state $WAIT_ONLINE_IFACE)" ]; then
  63                                 up=true
  64                                 break
  65                         fi
  66                         sleep 1
  67                 done
  68         fi
  69         [ $up = true ] || exit 1
  70         ;;
  71
  72 no|none)
  73         exit 0
  74         ;;
  75
  76 *)
  77         echo "Unknown wait method $WAIT_ONLINE_METHOD" >&2
  78         exit 1
  79         ;;
  80 esac