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Source file src/os/signal/signal_unix.go

Documentation: os/signal

  // Copyright 2012 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris windows
  
  package signal
  
  import (
  	"os"
  	"syscall"
  )
  
  // Defined by the runtime package.
  func signal_disable(uint32)
  func signal_enable(uint32)
  func signal_ignore(uint32)
  func signal_recv() uint32
  
  func loop() {
  	for {
  		process(syscall.Signal(signal_recv()))
  	}
  }
  
  func init() {
  	signal_enable(0) // first call - initialize
  	go loop()
  }
  
  const (
  	numSig = 65 // max across all systems
  )
  
  func signum(sig os.Signal) int {
  	switch sig := sig.(type) {
  	case syscall.Signal:
  		i := int(sig)
  		if i < 0 || i >= numSig {
  			return -1
  		}
  		return i
  	default:
  		return -1
  	}
  }
  
  func enableSignal(sig int) {
  	signal_enable(uint32(sig))
  }
  
  func disableSignal(sig int) {
  	signal_disable(uint32(sig))
  }
  
  func ignoreSignal(sig int) {
  	signal_ignore(uint32(sig))
  }
  

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