56b842f0b7
nopingtime UCI option rationale: I want relatively fast reaction(i.e. 1m or 2m) for 'no internet' condition, but i don't want my router to reboot every 1 minute if there is still no internet after reboot. initd_watchcat: * add: nopingtime uci option support * add: defaults to all non-critical options * add: log warnings for non-critical errors(when option is missed and default is applyed) * fix: error handling and config_get defaults are somtimes in conflict because of config_get defaults. They are gone now, error handling improved. * fix: calling watchcat.sh with 'period' mode instead of 'ping'. Typo? * fix: pingperiod default changed from period/20 to more reasonable period/5 watchcat.sh: * add: nopingtime uci option support( sleep if uptime < nopingtime ) * remove: [ "$mode" = "allways" ] && mode="always" - not needed, already done by initd_watchcat in load_watchcat() func * add: echo 1 > /proc/sys/kernel/sysrq before sysrq-trigger * refactor: eliminated once used not needed variables, code size reduced. * PKG_RELEASE bumped up Signed-off-by: Vasily Trotzky <trotzky.vas@gmail.com>
65 lines
1.8 KiB
Bash
65 lines
1.8 KiB
Bash
#!/bin/sh
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#
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# Copyright (C) 2010 segal.di.ubi.pt
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#
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# This is free software, licensed under the GNU General Public License v2.
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#
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reboot_now() {
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reboot &
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[ "$1" -ge 1 ] && {
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sleep "$1"
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echo 1 > /proc/sys/kernel/sysrq
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echo b > /proc/sysrq-trigger # Will immediately reboot the system without syncing or unmounting your disks.
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}
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}
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watchcat_always() {
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local period="$1"; local forcedelay="$2"
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sleep "$period" && reboot_now "$forcedelay"
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}
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watchcat_ping() {
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local period="$1"; local forcedelay="$2"; local pinghosts="$3"; local pingperiod="$4"; local nopingtime="$5"
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local time_now="$(cat /proc/uptime)";time_now="${time_now%%.*}"
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[ "$time_now" -lt "$nopingtime" ] && sleep "$((nopingtime-time_now))"
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time_now="$(cat /proc/uptime)";time_now="${time_now%%.*}"
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local time_lastcheck="$time_now"
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local time_lastcheck_withinternet="$time_now"
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while true
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do
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# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
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time_now="$(cat /proc/uptime)"; time_now="${time_now%%.*}"
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local time_diff="$((time_now-time_lastcheck))"
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[ "$time_diff" -lt "$pingperiod" ] && sleep "$((pingperiod-time_diff))"
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time_now="$(cat /proc/uptime)";time_now="${time_now%%.*}"
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time_lastcheck="$time_now"
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for host in $pinghosts
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do
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if ping -c 1 "$host" &> /dev/null
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then
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time_lastcheck_withinternet="$time_now"
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else
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logger -p daemon.info -t "watchcat[$$]" "no internet connectivity for $((time_now-time_lastcheck_withinternet)). Reseting when reaching $period"
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fi
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done
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[ "$((time_now-time_lastcheck_withinternet))" -ge "$period" ] && reboot_now "$forcedelay"
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done
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}
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if [ "$1" = "always" ]
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then
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watchcat_always "$2" "$3"
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else
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watchcat_ping "$2" "$3" "$4" "$5" "$6"
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fi
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