Clark Wang wrote:
I've checked the ssh process and it does not catch SIGTTIN and that's why I'm confused.
---- From what I understand, a background process will automatically block when it tries to read from STDIN. By definition, processes become bg-processes by using '&'. I haven't looked at the code, but I'm guessing that the first 'ssh' that you launched (*without* the '&') is the process swallowing your input as it was declared to be a some sort of master-multiplexer for subsequent slave processes, but that's just a guess. Maybe putting the master in background @ launch (using '&') will cause it to auto-block(suspend) as you expect?
