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// Copyright 2009 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.
// Package signal implements operating system-independent signal handling.
package signal
import (
"runtime"
"strconv"
)
// A Signal can represent any operating system signal.
type Signal interface {
String() string
}
type UnixSignal int32
func (sig UnixSignal) String() string {
s := runtime.Signame(int32(sig))
if len(s) > 0 {
return s
}
return "Signal " + strconv.Itoa(int(sig))
}
// Incoming is the global signal channel.
// All signals received by the program will be delivered to this channel.
var Incoming <-chan Signal
func process(ch chan<- Signal) {
for {
var mask uint32 = runtime.Sigrecv()
for sig := uint(0); sig < 32; sig++ {
if mask&(1<<sig) != 0 {
ch <- UnixSignal(sig)
}
}
}
}
func init() {
runtime.Siginit()
ch := make(chan Signal) // Done here so Incoming can have type <-chan Signal
Incoming = ch
go process(ch)
}
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