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 correspond-
       ing 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
       unspecified.

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 Technol-
       ogy -- 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)