UNGETC(3S) UNGETC(3S)
NAME
ungetc - push character back into input stream
SYNOPSIS
#include <stdio.h>
ungetc(c, stream)
FILE *stream;
DESCRIPTION
Ungetc pushes the character c back on an input stream. That character will be returned by the next getc call on that stream. Ungetc
returns c.
One character of pushback is guaranteed provided something has been read from the stream and the stream is actually buffered. Attempts to
push EOF are rejected.
Fseek(3S) erases all memory of pushed back characters.
SEE ALSO
getc(3S), setbuf(3S), fseek(3S)
DIAGNOSTICS
Ungetc returns EOF if it can't push a character back.
7th Edition May 15, 1985 UNGETC(3S)
