VFPRINTF(3)

NAME
vfprintf, vprintf, vsprintf, vsnprintf, vasprintf, vasnprintf, _vfprintf_r, _vprintf_r, _vsprintf_r, _vsnprintf_r, _vasprintf_r, _vasnprintf_r - format argument list

SYNOPSIS

#include <stdio.h>

#include <stdarg.h>

int vprintf(const char *fmt, va_list list);

int vfprintf(FILE *fp, const char *fmt, va_list list);

int vsprintf(char *str, const char *fmt, va_list list);

int vsnprintf(char *str, size_t size, const char *fmt, va_list list);

int vasprintf(char **strp, const char *fmt, va_list list);

char *vasnprintf(char *str, size_t *size, const char *fmt, va_list list);

int _vprintf_r(struct _reent *reent, const char *fmt, va_list list);

int _vfprintf_r(struct _reent *reent, FILE *fp, const char *fmt, va_list list);

int _vsprintf_r(struct _reent *reent, char *str, const char *fmt, va_list list);

int _vasprintf_r(struct _reent *reent, char **str, const char *fmt, va_list list);

int _vsnprintf_r(struct _reent *reent, char *str, size_t size, const char *fmt, va_list list);

char *_vasnprintf_r(struct _reent *reent, char *str, size_t *size, const char *fmt, va_list list);

DESCRIPTION

vprintf, vfprintf, vasprintf, vsprintf, vsnprintf, and vasnprintf are (respectively) variants of printf, fprintf, asprintf, sprintf, snprintf, and asnprintf. They differ only in allowing their caller to pass the variable argument list as a va_list object (initialized by va_start) rather than directly accepting a variable number of arguments. The caller is responsible for calling va_end.

_vprintf_r, _vfprintf_r, _vasprintf_r, _vsprintf_r, _vsnprintf_r, and _vasnprintf_r are reentrant versions of the above.

RETURNS

The return values are consistent with the corresponding functions.

PORTABILITY

ANSI C requires vprintf, vfprintf, vsprintf, and vsnprintf. The remaining functions are newlib extensions.

Supporting OS subroutines required: close, fstat, isatty, lseek, read, sbrk, write.

AUTHORS

Steve Chamberlain
    Author.

Roland Pesch
    Author.

Red Hat Support

Jeff Johnston
    Author.

COPYRIGHT

This file documents the ANSI C library.

Copyright (C) 1992, 1993, 1994-2014 Red Hat, Inc.

libc includes software developed by the University of California, Berkeley and its contributors.

libc includes software developed by Martin Jackson, Graham Haley and Steve Chamberlain of Tadpole Technology and released to Cygnus.

libc uses floating-point conversion software developed at AT&T, which includes this copyright information:

The author of this software is David M. Gay.

Copyright (c) 1991 by AT&T.

Permission to use, copy, modify, and distribute this software for any purpose without fee is hereby granted, provided that this entire notice is included in all copies of any software which is or includes a copy or modification of this software and in all copies of the supporting documentation for such software.

THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED WARRANTY. IN PARTICULAR, NEITHER THE AUTHOR NOR AT&T MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.

Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.

Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, subject to the terms of the GNU General Public License, which includes the provision that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.

Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions.