empty() for USG UNIX ?

[Dan Ts'o]

	Sorry for being so lazy, but can someone send me a C routine for
the USG System V termio equivalent of the old Rand empty(fd) call.
The empty(fd) call took a file descriptor argument, usually a tty, and returned
1 if there were no characters in the queue to read (would block if read(fd)
were issued) and 0 if there were bytes to read. It also worked on pipes, but
I don't care about that feature at this point. I have the 4BSD equivalent,
which just uses ioctl(FIONREAD) to return how many characters are in the
queue. So what is the System V equivalent ? Thanks.
	Please email responses.

				Cheers,
				Dan Ts'o		212-570-7671
				Dept. Neurobiology	dan at rna.rockefeller.edu
				Rockefeller Univ.	...cmcl2!rna!dan
				1230 York Ave.		rna!dan at nyu.arpa
				NY, NY 10021		tso at rockefeller.arpa
							tso at rockvax.bitnet