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#!/bin/sh
# How often to test, seconds
ping_time=67
# "One ping, must have reply in 1 sec"
ping_opts="-c1 -W1 -w1"
# If ping failed, how soon to retry
retry_time=5
# Reinit after this many consecutive ping error
max_fail=5
# Interface whose DHCP data to use
if=${PWD##*/dhcp_}
if=${if%%_pinger}
msg() {
echo "`date '+%Y-%m-%d %H:%M:%S'` $*" >>"$0.log"
}
if test -f "$0.log"; then
tail -999 "$0.log" >"$0.log.new"
mv "$0.log.new" "$0.log"
fi
test -f "../dhcp_$if/env.out" || exec env - sleep "$ping_time"
. "../dhcp_$if/env.out"
test x"$router" != x"" || exec env - sleep "$ping_time"
#msg "Pinging $router"
failcnt=0
while true; do
ping $ping_opts "$router" && exec env - sleep "$ping_time"
failcnt=$((failcnt+1))
msg "Failed to ping $router, fail count:$failcnt"
test $failcnt -ge $max_fail && break
env - sleep "$retry_time"
done
test -d "../dhcp_$if" && {
msg "Restarting dhcp_$if"
svc -t "dhcp_$if"
}
test -d "../supplicant_$if" && {
msg "Restarting supplicant_$if"
svc -t "supplicant_$if"
}
exec env - sleep "$ping_time"
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