FIORDCHK

[Aryeh M. Weiss]

In article <4587 at questar.QUESTAR.MN.ORG> jeff at questar.UUCP (Jeff Holmes) writes:
>...
>	In /usr/include/term.h there is a comment about modification
>	history dated MAR 18,1988 and the comment...
>
>	   ...added XENIX FIORDCHK as alternative to BSD FIONREAD...
>
>	So i tried x = ioctl(0, FIORDCHK, &n) and noticed that "n"
>	did NOT change but the return value from ioctl was 1 on
>	a function key press and 0 for anything that returned a single
>	character.
>
See the SCO function rdchk(S).  Rdchk(S) returns 1 if there is data to
be read from the tty.  FIORDCHK sounds like it is the ioctl interface to
the same function or else rdchk is a wrapper function for this ioctl call.
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