utils/watchcat/files/initd_watchcat

   1 #!/bin/sh /etc/rc.common
   2
   3 START=97
   4
   5 PIDFILE="/tmp/run/watchcat"
   6
   7 append_string() {
   8         local varname="$1"; local add="$2"; local separator="${3:- }"; local actual
   9         eval "actual=\$$varname"
  10
  11         new="${actual:+$actual$separator}$add"
  12         eval "$varname=\$new"
  13 }
  14
  15 timetoseconds() {
  16         local time=$1
  17         unset seconds
  18
  19         { [ "$time" -ge 1 ] 2> /dev/null && seconds="$time"; } || \
  20         { [ "${time%s}" -ge 1 ] 2> /dev/null && seconds="${time%s}"; } || \
  21         { [ "${time%m}" -ge 1 ] 2> /dev/null && seconds=$((${time%m}*60)); } || \
  22         { [ "${time%h}" -ge 1 ] 2> /dev/null && seconds=$((${time%h}*3600)); } || \
  23         { [ "${time%d}" -ge 1 ] 2> /dev/null && seconds=$((${time%d}*86400)); }
  24 }
  25
  26 load_watchcat() {
  27         config_get period       $1 period
  28         config_get mode         $1 mode         "always"
  29         config_get pinghosts    $1 pinghosts    "8.8.8.8"
  30         config_get pingperiod   $1 pingperiod
  31         config_get forcedelay   $1 forcedelay   "0"
  32
  33         # Fix potential typo in mode (backward compatibility).
  34         [ "$mode" = "allways" ] && mode="always"
  35
  36         error=""
  37
  38         timetoseconds "$period"
  39         period="$seconds"
  40         [ "$period" -ge 1 ] \
  41                 || append_string "error" 'period is not a valid time value (ex: "30"; "4m"; "6h"; "2d")' "; "
  42         [ "$mode" = "always" -o "$mode" = "ping" ] \
  43                 || append_string "error" "mode must be 'always' or 'ping'" "; "
  44         [ -n "$pinghosts" -o "$mode" = "always" ] \
  45                 || append_string "error" "pinghosts must be set when in 'ping' mode" "; "
  46         [ "$mode" = "ping" ] && {
  47                 if [ -n "$pingperiod" ]
  48                 then
  49                         timetoseconds "$pingperiod"
  50                         pingperiod="$seconds"
  51                         if [ "$pingperiod" -ge 0 ]
  52                         then
  53                                 [ "$pingperiod" -lt "$period" ] \
  54                                         || append_string "error" "pingperiod must be less than period" "; "
  55                         else
  56                                 append_string "error" 'pingperiod is not a valid time value (ex: "30"; "4m"; "6h"; "2d")' "; "
  57                         fi
  58                 else
  59                         pingperiod="$((period/20))"
  60                 fi
  61         }
  62         [ "$forcedelay" -ge 0 ] \
  63                 || append_string "error" "forcedelay must be a integer greater or equal than 0, where 0 means disabled" "; "
  64
  65         [ -n "$error" ] && { logger -p user.err -t "watchcat" "reboot program $1 not started - $error"; return; }
  66
  67         if [ "$mode" = "always" ]
  68         then
  69                 /usr/bin/watchcat.sh "always" "$period" "$forcedelay" &
  70                 logger -p user.info -t "watchcat" "started task (mode=$mode;period=$period;forcedelay=$forcedelay)"
  71         else
  72                 /usr/bin/watchcat.sh "period" "$period" "$forcedelay" "$pinghosts" "$pingperiod" &
  73                 logger -p user.info -t "watchcat" "started task (mode=$mode;period=$period;pinghosts=$pinghosts;pingperiod=$pingperiod;forcedelay=$forcedelay)"
  74         fi
  75
  76         echo $! >> "${PIDFILE}.pids"
  77 }
  78
  79 stop() {
  80         if [ -f "${PIDFILE}.pids" ]
  81         then
  82                 logger -p user.info -t "watchcat" "stopping all tasks"
  83
  84                 while read pid
  85                 do
  86                         kill "$pid"
  87                 done < "${PIDFILE}.pids"
  88
  89                 rm "${PIDFILE}.pids"
  90
  91                 logger -p user.info -t "watchcat" "all tasks stopped"
  92         else
  93                 logger -p user.info -t "watchcat" "no tasks running"
  94         fi
  95 }
  96
  97 start() {
  98         [ -f "${PIDFILE}.pids" ] && stop
  99
 100         config_load system
 101         if [ -n "$(uci show system.@watchcat[0])" ] # at least one watchcat section exists
 102         then
 103                 logger -p user.info -t "watchcat" "starting all tasks"
 104                 config_foreach load_watchcat watchcat
 105                 logger -p user.info -t "watchcat" "all tasks started"
 106         else
 107                 logger -p user.info -t "watchcat" "no tasks defined"
 108         fi
 109 }