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Source file src/os/signal/signal_unix.go

Documentation: os/signal

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows
     6  
     7  package signal
     8  
     9  import (
    10  	"os"
    11  	"syscall"
    12  )
    13  
    14  // Defined by the runtime package.
    15  func signal_disable(uint32)
    16  func signal_enable(uint32)
    17  func signal_ignore(uint32)
    18  func signal_ignored(uint32) bool
    19  func signal_recv() uint32
    20  
    21  func loop() {
    22  	for {
    23  		process(syscall.Signal(signal_recv()))
    24  	}
    25  }
    26  
    27  func init() {
    28  	signal_enable(0) // first call - initialize
    29  	go loop()
    30  }
    31  
    32  const (
    33  	numSig = 65 // max across all systems
    34  )
    35  
    36  func signum(sig os.Signal) int {
    37  	switch sig := sig.(type) {
    38  	case syscall.Signal:
    39  		i := int(sig)
    40  		if i < 0 || i >= numSig {
    41  			return -1
    42  		}
    43  		return i
    44  	default:
    45  		return -1
    46  	}
    47  }
    48  
    49  func enableSignal(sig int) {
    50  	signal_enable(uint32(sig))
    51  }
    52  
    53  func disableSignal(sig int) {
    54  	signal_disable(uint32(sig))
    55  }
    56  
    57  func ignoreSignal(sig int) {
    58  	signal_ignore(uint32(sig))
    59  }
    60  
    61  func signalIgnored(sig int) bool {
    62  	return signal_ignored(uint32(sig))
    63  }
    64  

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