watchMaster() — fiber Function Reference

Architecture documentation for the watchMaster() function in prefork.go from the fiber codebase.

Function go FiberCore Context

Entity Profile

FiberCore→ Context→ watchMaster() — fiber Function Reference

Dependency Diagram

graph TD
  1d38d225_f9eb_da1d_8937_6e20eea89b24["watchMaster()"]
  8f3667ad_bf3e_1448_af92_703572fb17e0["prefork.go"]
  1d38d225_f9eb_da1d_8937_6e20eea89b24 -->|defined in| 8f3667ad_bf3e_1448_af92_703572fb17e0
  style 1d38d225_f9eb_da1d_8937_6e20eea89b24 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

prefork.go lines 157–175

func watchMaster() {
	if runtime.GOOS == windowsOS {
		// finds parent process,
		// and waits for it to exit
		p, err := os.FindProcess(os.Getppid())
		if err == nil {
			_, _ = p.Wait() //nolint:errcheck // It is fine to ignore the error here
		}
		os.Exit(1) //nolint:revive // Calling os.Exit is fine here in the prefork
	}
	// if it is equal to 1 (init process ID),
	// it indicates that the master process has exited
	const watchInterval = 500 * time.Millisecond
	for range time.NewTicker(watchInterval).C {
		if os.Getppid() == 1 {
			os.Exit(1) //nolint:revive // Calling os.Exit is fine here in the prefork
		}
	}
}