xprintf_errno.c revision 255108 
1/*-
2 * Copyright (c) 2005 Poul-Henning Kamp
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 * $FreeBSD: head/lib/libc/stdio/xprintf_errno.c 255108 2013-08-31 22:32:42Z jilles $
27 */
28
29#include <namespace.h>
30#include <stdio.h>
31#include <string.h>
32#include <stdlib.h>
33#include <wchar.h>
34#include <vis.h>
35#include <assert.h>
36#include <sys/time.h>
37#include "errlst.h"
38#include "printf.h"
39
40int
41__printf_arginfo_errno(const struct printf_info *pi __unused, size_t n, int *argt)
42{
43
44	assert(n >= 1);
45	argt[0] = PA_INT;
46	return (1);
47}
48
49int
50__printf_render_errno(struct __printf_io *io, const struct printf_info *pi __unused, const void *const *arg)
51{
52	int ret, error;
53	char buf[64];
54	const char *p;
55
56	ret = 0;
57	error = *((const int *)arg[0]);
58	if (error >= 0 && error < __hidden_sys_nerr) {
59		p = strerror(error);
60		return (__printf_out(io, pi, p, strlen(p)));
61	}
62	sprintf(buf, "errno=%d/0x%x", error, error);
63	ret += __printf_out(io, pi, buf, strlen(buf));
64	__printf_flush(io);
65	return(ret);
66}
67