src/conductor/signal.go

   1 /* signal.go
   2  *
   3  * Signal Handlers
   4  */
   5
   6 package main
   7
   8 import (
   9         "os/signal"
  10         "os"
  11         "syscall"
  12         "fmt"
  13         o "orchestra"
  14 )
  15
  16
  17 // handle the signals.  By default, we ignore everything, but the
  18 // three terminal signals, HUP, INT, TERM, we want to explicitly
  19 // handle.
  20 func signalHandler() {
  21         for {
  22                 sig := <-signal.Incoming
  23
  24                 ux, ok := sig.(os.UnixSignal)
  25                 if !ok {
  26                         o.Warn("Couldn't handle signal %s, Coercion failed", sig)
  27                         continue
  28                 }
  29
  30                 switch int(ux) {
  31                 case syscall.SIGHUP:
  32                         o.Warn("Reloading Configuration")
  33                         ConfigLoad()
  34                 case syscall.SIGINT:
  35                         fmt.Fprintln(os.Stderr, "Interrupt Received - Terminating")
  36                         //FIXME: Gentle Shutdown
  37                         SaveState()
  38                         os.Exit(1)
  39                 case syscall.SIGTERM:
  40                         fmt.Fprintln(os.Stderr, "Terminate Received - Terminating")
  41                         //FIXME: Gentle Shutdown
  42                         os.Exit(2)
  43                 }
  44         }
  45
  46 }
  47
  48 func init() {
  49         go signalHandler()
  50 }