39 lines
923 B
Go
39 lines
923 B
Go
package common
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import (
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"os"
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"os/signal"
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"runtime"
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"syscall"
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)
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// A subsystem/server/... that can be stopped or queried about the status with a signal
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type SignalsReceiver interface {
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Status() string
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Stop() error
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}
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func SignalHandlerLoop(ss ...SignalsReceiver) {
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGUSR1)
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buf := make([]byte, 1<<20)
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for {
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sig := <-sigs
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switch sig {
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case syscall.SIGINT:
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Info.Printf("=== received SIGINT ===\n*** exiting\n")
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for _, subsystem := range ss {
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subsystem.Stop()
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}
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os.Exit(0)
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case syscall.SIGQUIT:
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stacklen := runtime.Stack(buf, true)
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Info.Printf("=== received SIGQUIT ===\n*** goroutine dump...\n%s\n*** end\n", buf[:stacklen])
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case syscall.SIGUSR1:
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for _, subsystem := range ss {
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Info.Printf("=== received SIGUSR1 ===\n*** status...\n%s\n*** end\n", subsystem.Status())
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}
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}
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}
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}
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