[ILUG] Output on/off in SSH?
kenn at linux.ie
Sun Sep 17 23:00:22 IST 2000
VMS's terminal driver had a cool little feature... Because
programs could produce reams of output and because terminals
were (and still are) quite slow, you could hit Ctrl-O to
toggle output to the terminal.
Hit it once and the machine says *OUTPUT OFF*, your program
runs bucket loads faster if it was I/O-bound on stdout, then
hit it again and you get your output again.
And, IIRC, CTERM (like telnet, the protocol behind the
SET HOST command) was smart enough, that when you hit ^O
locally, the remote machine was told to stop sending
the output, thus ensuring that the unwanted output didn't
waste bandwidth and slow down the running program by
going across the wire.
Now, the TELNET protocol seems to have something similar.
You can send an AO (abort output) which apparently tells
the remote to flush any pending output.
But it seems you can't do this with SSH. Argh!
Kenn (who's dealing with voluminous output over a 28.8k modem...)
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