Plan 9 from Bell Labs’s /usr/web/sources/patch/maybe/telnet-notkbd/readme

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
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This patch corrects a couple of minor problems with telnet when using
the notkbd option (-n).

The first issue was to disable changing raw mode when a pipe was being
used.  This would result in raw mode being enabled on the calling
console.

The second issue was a deadlock caused by the net child being handed a
terminal note.  This would cause the parent to spin waiting for the
child to notify.  This was changed to a waitpid loop such that the
main thread can shutdown gracefully if needed.

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