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RocketLink!--> Man page versions: OpenBSD FreeBSD Solaris Others

[ANSI C X3.159-1989]

UNGETC(3)                 OpenBSD Programmer's Manual                UNGETC(3)

     ungetc - un-get character from input stream

     #include <stdio.h>

     ungetc(int c, FILE *stream);

     The ungetc() function pushes the character c (converted to an unsigned
     char) back onto the input stream pointed to by stream. The pushed-backed
     characters will be returned by subsequent reads on the stream (in reverse
     order).  A successful intervening call, using the same stream, to one of
     the file positioning functions (fseek(3),  fsetpos(3),  or rewind(3))
     will discard the pushed back characters.

     One character of push-back is guaranteed, but as long as there is suffi-
     cient memory, an effectively infinite amount of pushback is allowed.

     If a character is successfully pushed-back, the end-of-file indicator for
     the stream is cleared.

     The ungetc() function returns the character pushed-back after the conver-
     sion, or EOF if the operation fails.  If the value of the argument c
     character equals EOF, the operation will fail and the stream will remain

     fseek(3),  getc(3),  setvbuf(3)

     The ungetc() function conforms to ANSI X3.159-1989 (``ANSI C'').

OpenBSD 2.6                      June 4, 1993                                1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for ungetc(3) functions
OpenBSD sources for ungetc(3)

[Overview Topics]

Up to: Stdio Stream file operations - Buffered access of files and devices. fopen, fputc, fgetc, et al.

RocketLink!--> Man page versions: OpenBSD FreeBSD Solaris Others

[ANSI C X3.159-1989]

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