huschi.net

VFSCANF(3P)                POSIX Programmer's Manual               VFSCANF(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       vfscanf, vscanf, vsscanf - format input of a stdarg argument list
SYNOPSIS
       #include <stdarg.h>
       #include <stdio.h>
       int vfscanf(FILE *restrict stream, const char *restrict format,
              va_list arg);
       int vscanf(const char *restrict format, va_list arg);
       int vsscanf(const char *restrict s, const char *restrict format,
              va_list arg);

DESCRIPTION
       The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to
       the  scanf(),  fscanf(),  and  sscanf() functions, respectively, except
       that instead of being called with a variable number of arguments,  they
       are  called  with an argument list as defined in the <stdarg.h> header.
       These functions shall not invoke the va_end macro. As  these  functions
       invoke  the  va_arg macro, the value of ap after the return is unspeci-
       fied.
RETURN VALUE
       Refer to fscanf().
ERRORS
       Refer to fscanf().
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       Applications using these functions should call va_end(  ap)  afterwards
       to clean up.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       fscanf(),   the   Base   Definitions  volume  of  IEEE Std 1003.1-2001,
       <stdarg.h>, <stdio.h>
COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the  referee document. The original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                  2003                          VFSCANF(3P)