5251135bc
Denys Vlasenko
2015-10-15
Subject
better pinger service example
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examples/var_service/dhcp_if_pinger/run+34 -10
| @@ -1,23 +1,47 @@ | |
| #!/bin/sh | |
| - | delay=67 |
| - | |
| + | # 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" "$0.log" | |
| fi | |
| - | test -f "/var/service/dhcp_$if/dhcp_$if.out" || exec env - sleep "$delay" |
| - | . "/var/service/dhcp_$if/dhcp_$if.out" |
| - | test x"$router" != x"" || exec env - sleep "$delay" |
| + | test -f "/var/service/dhcp_$if/dhcp_$if.out" || exec env - sleep "$ping_time" |
| - | #echo "`date '+%Y-%m-%d %H:%M:%S'` Testing ping -c3 $router" >>"$0.log" |
| - | ping -c3 "$router" && exec env - sleep "$delay" |
| + | . "/var/service/dhcp_$if/dhcp_$if.out" |
| + | test x"$router" != x"" || exec env - sleep "$ping_time" |
| - | echo "`date '+%Y-%m-%d %H:%M:%S'` Restarting /var/service/dhcp_$if" >>"$0.log" |
| - | sv t "/var/service/dhcp_$if" |
| + | #msg "Pinging $router" |
| + | failcnt=0 |
| + | while true; do |
| + | ping $ping_opts "$router" && exec env - sleep "$ping_time" |
| + | : $((failcnt++)) |
| + | msg "Failed to ping $router, fail count:$failcnt" |
| + | test $failcnt -ge $max_fail && break |
| + | env - sleep "$retry_time" |
| + | done |
| - | exec env - sleep "$delay" |
| + | test -d "/var/service/dhcp_$if" && { |
| + | msg "Restarting /var/service/dhcp_$if" |
| + | sv t "/var/service/dhcp_$if" |
| + | } |
| + | test -d "/var/service/supplicant_$if" && { |
| + | msg "Restarting /var/service/supplicant_$if" |
| + | sv t "/var/service/supplicant_$if" |
| + | } |
| + | exec env - sleep "$ping_time" |