How to Prevent Ctrl C from Interrupting exec.Command Child Processes?

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:

1. 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,
   }

2. 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() {
       

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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