On 09:34 Fri 04 Dec, Otto Moerbeek wrote: > > The main problem with this code is that ENOTTY is the wrong errno to > > return. ENOTTY has a very specific meaning. > > It's hard to pick the right one. ESRCH seems close, but is for the > reverse situation (you're requesting info for a pid taht does not exist). > How about ECHILD?
Maybe also ENOTCONN (as when no pid is available -- tunnel is not connected), or EPROCUNAVAIL/EPROGUNAVAIL (the name suits, but the intro(2) description doesn't).
