How do I find out how many characters are in the tty queue?

[Tim Ramsey]

Is there any way that I can find out how many characters are available and
waiting to be read from the tty input queue?  I'm running SysV rel 2.1.2.

Thanks in advance for any help.

Tim

-- 
Timothy Ramsey, USENET Keeper-Upper  | Ada:
BITNET: tar at KSUVAX1                  |         Just say NO!
Internet: tar at ksuvax1.cis.ksu.edu    |
UUCP: ... !{pyramid,ucsd}!ncr-sd!ncrwic!ksuvax1!tar