ttttiinnpp() -- Terminal-Device Routine

#iinncclluuddee <ssyyss/ttttyy.hh>
iinntt
ttttiinnpp(_t_p)
TTTTYY *_t_p;

ttttiinnpp() returns  a nonzero value if  the tty input queue  can accept input,
and returns zero if the queue is full.  Before you call ttttiinn(), use ttttiinnpp()
to see if it is safe to do so.

_S_e_e _A_l_s_o
tteerrmmiinnaall-ddeevviiccee rroouuttiinneess, ttttiinn(), ttttoouuttpp()
