centos man page for vfprintf

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 correspond-
       ing 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 unspeci-
       fied.

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 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							      VFPRINTF(3P)