.\" @(#)ungetc.3 4.1 (Berkeley) %G%
ungetc \- push character back into input stream
That character will be returned by the next
One character of pushback is guaranteed provided
something has been read from the stream and the stream is
Attempts to push EOF are rejected.
erases all memory of pushed back characters.
getc(3), setbuf(3), fseek(3)
if it can't push a character back.