xref: /freebsd/lib/libc/stdio/xprintf_errno.c (revision 39beb93c3f8bdbf72a61fda42300b5ebed7390c8)
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  * $FreeBSD$
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 "printf.h"
38 
39 int
40 __printf_arginfo_errno(const struct printf_info *pi __unused, size_t n, int *argt)
41 {
42 
43 	assert(n >= 1);
44 	argt[0] = PA_INT;
45 	return (1);
46 }
47 
48 int
49 __printf_render_errno(struct __printf_io *io, const struct printf_info *pi __unused, const void *const *arg)
50 {
51 	int ret, error;
52 	char buf[64];
53 	const char *p;
54 
55 	ret = 0;
56 	error = *((const int *)arg[0]);
57 	if (error >= 0 && error < sys_nerr) {
58 		p = strerror(error);
59 		return (__printf_out(io, pi, p, strlen(p)));
60 	}
61 	sprintf(buf, "errno=%d/0x%x", error, error);
62 	ret += __printf_out(io, pi, buf, strlen(buf));
63 	__printf_flush(io);
64 	return(ret);
65 }
66