GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/net/herror.c Lines: 0 20 0.0 %
Date: 2017-11-13 Branches: 0 8 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: herror.c,v 1.10 2015/09/14 07:38:38 guenther Exp $	*/
2
3
/*
4
 * ++Copyright++ 1987, 1993
5
 * -
6
 * Copyright (c) 1987, 1993
7
 *    The Regents of the University of California.  All rights reserved.
8
 *
9
 * Redistribution and use in source and binary forms, with or without
10
 * modification, are permitted provided that the following conditions
11
 * are met:
12
 * 1. Redistributions of source code must retain the above copyright
13
 *    notice, this list of conditions and the following disclaimer.
14
 * 2. Redistributions in binary form must reproduce the above copyright
15
 *    notice, this list of conditions and the following disclaimer in the
16
 *    documentation and/or other materials provided with the distribution.
17
 * 3. Neither the name of the University nor the names of its contributors
18
 *    may be used to endorse or promote products derived from this software
19
 *    without specific prior written permission.
20
 *
21
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31
 * SUCH DAMAGE.
32
 * -
33
 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
34
 *
35
 * Permission to use, copy, modify, and distribute this software for any
36
 * purpose with or without fee is hereby granted, provided that the above
37
 * copyright notice and this permission notice appear in all copies, and that
38
 * the name of Digital Equipment Corporation not be used in advertising or
39
 * publicity pertaining to distribution of the document or software without
40
 * specific, written prior permission.
41
 *
42
 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
43
 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
44
 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
45
 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
46
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
47
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
48
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
49
 * SOFTWARE.
50
 * -
51
 * --Copyright--
52
 */
53
54
#include <sys/types.h>
55
#include <sys/uio.h>
56
#include <netdb.h>
57
#include <unistd.h>
58
#include <string.h>
59
60
const char * const h_errlist[] = {
61
	"Resolver Error 0 (no error)",
62
	"Unknown host",				/* 1 HOST_NOT_FOUND */
63
	"Host name lookup failure",		/* 2 TRY_AGAIN */
64
	"Unknown server error",			/* 3 NO_RECOVERY */
65
	"No address associated with name",	/* 4 NO_ADDRESS */
66
};
67
const int	h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
68
69
extern int	h_errno;
70
71
/*
72
 * herror --
73
 *	print the error indicated by the h_errno value.
74
 */
75
void
76
herror(const char *s)
77
{
78
	struct iovec iov[4];
79
	struct iovec *v = iov;
80
81
	if (s && *s) {
82
		v->iov_base = (char *)s;
83
		v->iov_len = strlen(s);
84
		v++;
85
		v->iov_base = ": ";
86
		v->iov_len = 2;
87
		v++;
88
	}
89
	v->iov_base = (char *)hstrerror(h_errno);
90
	v->iov_len = strlen(v->iov_base);
91
	v++;
92
	v->iov_base = "\n";
93
	v->iov_len = 1;
94
	writev(STDERR_FILENO, iov, (v - iov) + 1);
95
}
96
97
const char *
98
hstrerror(int err)
99
{
100
	if (err < 0)
101
		return ("Resolver internal error");
102
	else if (err < h_nerr)
103
		return (h_errlist[err]);
104
	return ("Unknown resolver error");
105
}
106
DEF_WEAK(hstrerror);