UNGETC(3S)                                                          UNGETC(3S)



NAME
       ungetc - push character back into input stream

SYNOPSIS
       #include <stdio.h>

       ungetc(c, stream)
       FILE *stream;

DESCRIPTION
       _U_n_g_e_t_c  pushes the character _c back on an input stream.  That character
       will be returned by the next _g_e_t_c call on that stream.  _U_n_g_e_t_c  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.

       _F_s_e_e_k(3S) erases all memory of pushed back characters.

SEE ALSO
       getc(3S), setbuf(3S), fseek(3S)

DIAGNOSTICS
       _U_n_g_e_t_c returns EOF if it can’t push a character back.



7th Edition                      May 15, 1985                       UNGETC(3S)