Partial output of remote telnet to local console about elks HOT 3 CLOSED

from elks.

The observed bad behaviour is coming from a poor redirection implementation in telnetd. I revised that implementation with a cleaner code, but I detected two new problems on the master side of the pseudo-terminal.

First is that select() does not work, and second is that read() blocks when at least one character is available but when requesting more characters than available (not compliant to read manual page).

I also had to disable getty on virtual consoles 2 and 3 to get enough memory space for ktcp, telnetd, sh and its children, but that latest is not really a bug, rather a known limitation.

from elks.

Server and PTY master side fixed. But the current implementation of telnetd is still poor : no login, no IAC handling, not able to restart another session, etc.

from elks.