Unbufferred file I/O

[Ben Humphreys]

As I have not been able to get any versions of talk to run on my SCO system, I
was forced to use write.  But write is a bummer because it is bufferred.  You
end up typing over top of each other.  With program bundle.c in hand, I fig-
ured it wouldn't be too hard to make it write one character at a time to the
tty and stay in interactive mode until EOF.  Boy was I wrong.  I ended up 
using read() and write() to read from the local terminal and write to the 
remote terminal.  But, as far as I can tell, write() doesn't actually write
until it receives a newline / carriage return.  Even if I close() and re
open() the /dev/ttynn file, it still won't flush it's buffer.  Is there a way
for force write() to flush the buffer without requiring a newline / carriage
return.  Or, optionally, is there a way to get one character from the local
terminal (unbufferred) and write said character to the local terminal (again, 
unbufferred)?  

Anyone got a version of talk.c to run under SCO 2.1.3???  
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