Function catchSignal

util/configv3/write_config.go:62–66

catchSignal tries to catch SIGHUP, SIGINT, SIGKILL, SIGQUIT and SIGTERM, and Interrupt for removing temporarily created config files before the program ends. Note: we cannot intercept a `kill -9`, so a well-timed `kill -9` will allow a temp config file to linger.

(sig chan os.Signal, tempConfigFileName string)

// ends.  Note:  we cannot intercept a `kill -9`, so a well-timed `kill -9`
// will allow a temp config file to linger.
func catchSignal(sig chan os.Signal, tempConfigFileName string) {
	<-sig
	_ = os.Remove(tempConfigFileName)
	os.Exit(2)
}