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1/* $OpenBSD: vdprintf.c,v 1.4 2025/08/08 15:58:53 yasuoka Exp $ */
2/* $FreeBSD: src/lib/libc/stdio/vdprintf.c,v 1.4 2012/11/17 01:49:40 svnexp Exp $ */
3
4/*-
5 * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Copyright (c) 2011 The FreeBSD Foundation
9 * All rights reserved.
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <errno.h>
36#include <stdarg.h>
37#include <stdio.h>
38#include <string.h>
39#include <unistd.h>
40
41#include "local.h"
42
43static int
44__dwrite(void *cookie, const char *buf, int n)
45{
46 int *fdp = cookie;
47 return (write(*fdp, buf, n));
48}
49
50int
51vdprintf(int fd, const char * __restrict fmt, va_list ap)
52{
53 FILE f = FILEINIT(__SWR);
54 unsigned char buf[BUFSIZ];
55 int ret;
56
57 f._p = buf;
58 f._w = sizeof(buf);
59 f._bf._base = buf;
60 f._bf._size = sizeof(buf);
61 f._cookie = &fd;
62 f._write = __dwrite;
63
64 if ((ret = __vfprintf(&f, fmt, ap)) < 0)
65 return ret;
66
67 return __sflush(&f) ? EOF : ret;
68}
69DEF_WEAK(vdprintf);