I'm trying to send a SIGTSTP signal to a child process. The problem I'm facing is that sending SIGTSTP to the child process halts my entire program and the caller is unable to proceed with execution of the rest of the program. Here's my code
cmd := exec.Command("ping", "google.com")
stdout, _ := cmd.StdoutPipe()
cmd.Start()
io.Copy(os.Stdout, stdout)
cmd.Wait()
Running this code, I get output from ping google.com printed on the terminal. When I hit ctrl-z, the output is stopped, but the program is not longer able to accept signals or do anything else unless SIGCONT is sent to the child process. Am I missing something? How do I suspend the child process but resume execution of the caller? Thanks.
Wait waits for the command to exit. Your child process isn't exiting, it's just paused, so Wait doesn't return.