Annotation of src/lib/libc/resolv/herror.c, Revision 1.6
1.6 ! ghen 1: /* $NetBSD: herror.c,v 1.1.1.3 2007/03/30 20:16:21 ghen Exp $ */
1.1 christos 2:
3: /*
4: * Copyright (c) 1987, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: /*
37: * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
38: * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
39: *
40: * Permission to use, copy, modify, and distribute this software for any
41: * purpose with or without fee is hereby granted, provided that the above
42: * copyright notice and this permission notice appear in all copies.
43: *
44: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
45: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
46: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
47: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
48: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
49: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
50: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
51: */
52:
1.3 christos 53: #include <sys/cdefs.h>
1.1 christos 54: #if defined(LIBC_SCCS) && !defined(lint)
1.3 christos 55: #ifdef notdef
1.5 christos 56: static const char rcsid[] = "Id: herror.c,v 1.3.18.1 2005/04/27 05:01:09 sra Exp";
1.3 christos 57: #else
1.6 ! ghen 58: __RCSID("$NetBSD: herror.c,v 1.5 2007/01/27 22:26:44 christos Exp $");
1.3 christos 59: #endif
1.1 christos 60: #endif /* LIBC_SCCS and not lint */
61:
62: #include "port_before.h"
63:
1.4 christos 64: #include "namespace.h"
1.1 christos 65: #include <sys/types.h>
66: #include <sys/param.h>
67: #include <sys/uio.h>
68:
69: #include <netinet/in.h>
70: #include <arpa/nameser.h>
71:
72: #include <netdb.h>
73: #include <resolv.h>
74: #include <string.h>
75: #include <unistd.h>
76:
77: #include "port_after.h"
78:
79: const char *h_errlist[] = {
80: "Resolver Error 0 (no error)",
1.5 christos 81: "Unknown host", /*%< 1 HOST_NOT_FOUND */
82: "Host name lookup failure", /*%< 2 TRY_AGAIN */
83: "Unknown server error", /*%< 3 NO_RECOVERY */
84: "No address associated with name", /*%< 4 NO_ADDRESS */
1.1 christos 85: };
86: int h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };
87:
88: #if !(__GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)
89: #undef h_errno
90: int h_errno;
91: #endif
92:
1.4 christos 93: #ifdef __weak_alias
94: __weak_alias(herror,_herror)
95: #endif
96:
1.5 christos 97: /*%
1.1 christos 98: * herror --
99: * print the error indicated by the h_errno value.
100: */
101: void
102: herror(const char *s) {
103: struct iovec iov[4], *v = iov;
104: char *t;
105:
106: if (s != NULL && *s != '\0') {
107: DE_CONST(s, t);
108: v->iov_base = t;
109: v->iov_len = strlen(t);
110: v++;
111: DE_CONST(": ", t);
112: v->iov_base = t;
113: v->iov_len = 2;
114: v++;
115: }
1.2 christos 116: DE_CONST(hstrerror(h_errno), t);
1.1 christos 117: v->iov_base = t;
118: v->iov_len = strlen(v->iov_base);
119: v++;
120: DE_CONST("\n", t);
121: v->iov_base = t;
122: v->iov_len = 1;
123: writev(STDERR_FILENO, iov, (v - iov) + 1);
124: }
125:
1.5 christos 126: /*%
1.1 christos 127: * hstrerror --
128: * return the string associated with a given "host" errno value.
129: */
130: const char *
131: hstrerror(int err) {
132: if (err < 0)
133: return ("Resolver internal error");
134: else if (err < h_nerr)
135: return (h_errlist[err]);
136: return ("Unknown resolver error");
137: }
1.5 christos 138:
139: /*! \file */
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