examples/var_service/dhcp_if_pinger/run

   1 #!/bin/sh
   2
   3 # How often to test, seconds
   4 ping_time=67
   5 # "One ping, must have reply in 1 sec"
   6 ping_opts="-c1 -W1 -w1"
   7 # If ping failed, how soon to retry
   8 retry_time=5
   9 # Reinit after this many consecutive ping error
  10 max_fail=5
  11 # Interface whose DHCP data to use
  12 if=${PWD##*/dhcp_}
  13 if=${if%%_pinger}
  14
  15 msg() {
  16         echo "`date '+%Y-%m-%d %H:%M:%S'` $*" >>"$0.log"
  17 }
  18
  19 if test -f "$0.log"; then
  20         tail -999 "$0.log" >"$0.log.new"
  21         mv "$0.log.new" "$0.log"
  22 fi
  23
  24 test -f "/var/service/dhcp_$if/env.out" || exec env - sleep "$ping_time"
  25
  26 . "/var/service/dhcp_$if/env.out"
  27 test x"$router" != x"" || exec env - sleep "$ping_time"
  28
  29 #msg "Pinging $router"
  30 failcnt=0
  31 while true; do
  32         ping $ping_opts "$router" && exec env - sleep "$ping_time"
  33         : $((failcnt++))
  34         msg "Failed to ping $router, fail count:$failcnt"
  35         test $failcnt -ge $max_fail && break
  36         env - sleep "$retry_time"
  37 done
  38
  39 test -d "/var/service/dhcp_$if" && {
  40         msg "Restarting /var/service/dhcp_$if"
  41         sv t "/var/service/dhcp_$if"
  42 }
  43 test -d "/var/service/supplicant_$if" && {
  44         msg "Restarting /var/service/supplicant_$if"
  45         sv t "/var/service/supplicant_$if"
  46 }
  47 exec env - sleep "$ping_time"