Poster of Linux kernelThe best gift for a Linux geek
VFPRINTF

VFPRINTF

Section: POSIX Programmer's Manual (P) Updated: 2003
Local index Up
 

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 original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
EXAMPLES
APPLICATION USAGE
RATIONALE
FUTURE DIRECTIONS
SEE ALSO
COPYRIGHT

This document was created by man2html, using the manual pages.
Time: 21:58:04 GMT, April 16, 2011