28 Feb
2017
28 Feb
'17
5:55 p.m.
On Feb 27, 2017, at 9:04 AM, Arthur Krewat
<krewat(a)kilonet.net> wrote:
In TOPS-10, you could detach from your current job, login again, and keep going. Then,
attach to the previous job, and go back and forth endlessly.
ITS had this feature as well.
I actually implemented this for UNIX in a crude way. I put a program as my login shell
that spawned off a shell on a PTY and the program did sort of a lightweight “telnet”
between the PTY and my login terminal.
I could then make the intermediary program go away (effectively logging out of the system)
while leaving the shell running on the PTY. The subsequent login, the program would
notice I still had my previous session running and offer to reconnect it for me.