JezK
Edit File: wait-online.sh
#!/bin/sh set -e WAIT_ONLINE_METHOD="ifup" WAIT_ONLINE_IFACE="" WAIT_ONLINE_ADDRESS="" WAIT_ONLINE_TIMEOUT=300 [ -f /etc/default/networking ] && . /etc/default/networking case "$WAIT_ONLINE_METHOD" in route) [ -n "$WAIT_ONLINE_ADDRESS" ] || WAIT_ONLINE_ADDRESS=default (timeout "$WAIT_ONLINE_TIMEOUT" ip mon r & ip -4 r s; ip -6 r s) | grep -q "^$WAIT_ONLINE_ADDRESS\>" ;; ping) if [ -z "$WAIT_ONLINE_ADDRESS" ]; then echo "No WAIT_ONLINE_ADDRESS specified" >&2 exit 1 fi timeout "$WAIT_ONLINE_TIMEOUT" sh -c 'while ! ping -q -c 1 -W 1 "'$WAIT_ONLINE_ADDRESS'" >/dev/null; do sleep 1; done' ;; ping6) if [ -z "$WAIT_ONLINE_ADDRESS" ]; then echo "No WAIT_ONLINE_ADDRESS specified" >&2 exit 1 fi timeout "$WAIT_ONLINE_TIMEOUT" sh -c 'while ! ping6 -q -c 1 -W 1 "'$WAIT_ONLINE_ADDRESS'" >/dev/null; do sleep 1; done' ;; ifup|iface|interface) up=false if [ -z "$WAIT_ONLINE_IFACE" ]; then auto_list="$(ifquery -X lo --list)" hotplug_list="$(ifquery -X lo --allow=hotplug --list)" if [ -n "$auto_list" ]; then for i in $(seq 1 $WAIT_ONLINE_TIMEOUT); do up=true for iface in $auto_list; do if ! ifquery --state $iface >/dev/null; then up=false break fi done if [ $up = true ]; then break fi sleep 1 done elif [ -n "$hotplug_list" ]; then for i in $(seq 1 $WAIT_ONLINE_TIMEOUT); do if [ -n "$(ifquery --state $hotplug_list)" ]; then up=true break fi sleep 1 done else exit 0 fi else for i in $(seq 1 $WAIT_ONLINE_TIMEOUT); do if [ -n "$(ifquery --state $WAIT_ONLINE_IFACE)" ]; then up=true break fi sleep 1 done fi [ $up = true ] || exit 1 ;; no|none) exit 0 ;; *) echo "Unknown wait method $WAIT_ONLINE_METHOD" >&2 exit 1 ;; esac