31 lines
692 B
Go
31 lines
692 B
Go
package signals
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import (
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"os"
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"os/signal"
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"syscall"
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)
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var onlyOneSignalHandler = make(chan struct{})
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var shutdownSignals = []os.Signal{os.Interrupt, syscall.SIGTERM}
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// SetupSignalHandler registered for SIGTERM and SIGINT. A stop channel is returned
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// which is closed on one of these signals. If a second signal is caught, the program
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// is terminated with exit code 1.
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func SetupSignalHandler() (stopCh <-chan struct{}) {
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close(onlyOneSignalHandler) // panics when called twice
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stop := make(chan struct{})
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c := make(chan os.Signal, 2)
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signal.Notify(c, shutdownSignals...)
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go func() {
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<-c
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close(stop)
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<-c
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os.Exit(1) // second signal. Exit directly.
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}()
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return stop
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}
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