SysV terminal input queue count

[Bill Mulert]

While doing a port of a C program from Mushdos to Unix, recently,
I needed to implement a kbhit() function. A kbhit comes in the
Mushdos library, and implementing one under a BSD Unix usually
involves an ioctl(fd, FIONREAD) or TIOQCOUNT. Ok, how does one
do it under SysV? I am looking at an NCR Tower with a system V,
and I can find no way to determine how many characters are waiting
in the terminal input queue, or even if there are, or are not
characters waiting.

                   So how can you tell?

-- 
               Bill Mulert  at  Klockner Ferromatik Desma
          {decuac,pyramid,tut.cis.ohio-state.edu}!uccba!kfd1!wdm
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