Interactive shells cannot use job control

[pete-woods]

Description

When starting an interactive BASH session, you get the error:

bash: no job control in this shell

This is because BASH cannot manage process groups, due to the lack of the below code:

	if cmd.SysProcAttr == nil {
		cmd.SysProcAttr = &syscall.SysProcAttr{}
	}
	cmd.SysProcAttr.Setsid = true
	cmd.SysProcAttr.Setctty = true

You can see creack PTY doing it here. I had to add the above code explicitly in my SSH server to work around.

https://github.com/creack/pty/blob/edfbf75025b0ba4ee17c19f52d9b600fad80a787/start.go#L18

I'm guessing you must somehow skip that pathway through creak when starting processes on UNIX.