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65 lines
1.2 KiB
65 lines
1.2 KiB
//go:build !plan9
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// +build !plan9
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package grace
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import (
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"os"
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"os/signal"
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"sync"
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"syscall"
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)
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var signalChan chan os.Signal
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var interruptHooks = make([]func(), 0)
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var interruptHookLock sync.RWMutex
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var reloadHooks = make([]func(), 0)
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var reloadHookLock sync.RWMutex
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func init() {
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signalChan = make(chan os.Signal, 1)
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signal.Notify(signalChan,
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os.Interrupt,
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os.Kill,
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syscall.SIGALRM,
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syscall.SIGHUP,
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syscall.SIGINT,
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syscall.SIGTERM,
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// syscall.SIGQUIT,
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)
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go func() {
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for s := range signalChan {
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if s.String() == syscall.SIGHUP.String() {
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reloadHookLock.RLock()
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for _, hook := range reloadHooks {
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hook()
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}
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reloadHookLock.RUnlock()
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} else {
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interruptHookLock.RLock()
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for _, hook := range interruptHooks {
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hook()
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}
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interruptHookLock.RUnlock()
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os.Exit(0)
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}
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}
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}()
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}
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func OnReload(fn func()) {
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// prevent reentry
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reloadHookLock.Lock()
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defer reloadHookLock.Unlock()
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reloadHooks = append(reloadHooks, fn)
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}
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func OnInterrupt(fn func()) {
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// prevent reentry
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interruptHookLock.Lock()
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defer interruptHookLock.Unlock()
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// deal with control+c,etc
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// controlling terminal close, daemon not exit
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interruptHooks = append(interruptHooks, fn)
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}
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