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VFPRINTF(3P)			    POSIX Programmer's Manual			     VFPRINTF(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
       vfprintf, vprintf, vsnprintf, vsprintf - format output of a stdarg argument list

SYNOPSIS
       #include <stdarg.h>
       #include <stdio.h>

       int vfprintf(FILE *restrict stream, const char *restrict format,
	      va_list ap);
       int vprintf(const char *restrict format, va_list ap);
       int vsnprintf(char *restrict s, size_t n, const char *restrict format,
	      va_list ap);
       int vsprintf(char *restrict s, const char *restrict format, va_list ap);

DESCRIPTION
       The  vprintf(),	vfprintf(),  vsnprintf(), and vsprintf() functions shall be equivalent to
       printf(), fprintf(), snprintf(), and sprintf() respectively, except that instead of  being
       called  with  a	variable  number  of  arguments, they are called with an argument list as
       defined by <stdarg.h>.

       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 fprintf().

ERRORS
       Refer to fprintf().

       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
       fprintf(), 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				     VFPRINTF(3P)
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