Handling Ctrl C Interruptions in exec.Command
When executing external processes using exec.Command, it's crucial to consider how interruptions, such as Ctrl C, are handled. By default, pressing Ctrl C interrupts the entire process group, including child processes. This behavior can be problematic if you want to prevent interruption of specific processes.
To resolve this issue and prevent Ctrl C from disrupting child processes, follow these steps:
Set Process Group: Before executing the child process, use the SysProcAttr field to configure the process group.
cmd := exec.Command("sleep", "60") cmd.SysProcAttr = &syscall.SysProcAttr{ Setpgid: true, }
Signal Handling: In the parent process, handle the Ctrl C signal to prevent it from propagating to the process group.
interrupt := make(chan os.Signal, 1) signal.Notify(interrupt, os.Interrupt) go func() { <-interrupt log.Println("Ctrl+C received") // Perform any necessary cleanup or handling for Ctrl+C }() cmd.Run()
By separating the process group of the child process and handling the interrupt signal, you can prevent Ctrl C from disrupting the execution of the child process while allowing the parent process to handle the interruption as desired.
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