vdprintf.c revision 189356 
1/*-
2 * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/lib/libc/stdio/vdprintf.c 189356 2009-03-04 03:38:51Z das $");
29
30#include "namespace.h"
31#include <errno.h>
32#include <limits.h>
33#include <stdarg.h>
34#include <stdio.h>
35#include "un-namespace.h"
36
37#include "local.h"
38
39int
40vdprintf(int fd, const char * __restrict fmt, va_list ap)
41{
42	FILE f;
43	unsigned char buf[BUFSIZ];
44	int ret;
45
46	if (fd > SHRT_MAX) {
47		errno = EMFILE;
48		return (EOF);
49	}
50
51	f._p = buf;
52	f._w = sizeof(buf);
53	f._flags = __SWR;
54	f._file = fd;
55	f._cookie = &f;
56	f._write = __swrite;
57	f._bf._base = buf;
58	f._bf._size = sizeof(buf);
59	f._orientation = 0;
60	bzero(&f._mbstate, sizeof(f._mbstate));
61
62	if ((ret = __vfprintf(&f, fmt, ap)) < 0)
63		return (ret);
64
65	return (__fflush(&f) ? EOF : ret);
66}
67