errno2result.c revision 1.2 
1/*	$NetBSD: errno2result.c,v 1.2 2014/12/19 20:43:16 christos Exp $	*/
2
3/*
4 * Copyright (C) 2004, 2005, 2007, 2011, 2012  Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (C) 2000-2002  Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17 * PERFORMANCE OF THIS SOFTWARE.
18 */
19
20/* Id */
21
22/*! \file */
23
24#include <config.h>
25
26#include <isc/result.h>
27#include <isc/strerror.h>
28#include <isc/util.h>
29
30#include "errno2result.h"
31
32/*%
33 * Convert a POSIX errno value into an isc_result_t.  The
34 * list of supported errno values is not complete; new users
35 * of this function should add any expected errors that are
36 * not already there.
37 */
38isc_result_t
39isc___errno2result(int posixerrno, const char *file, unsigned int line) {
40	char strbuf[ISC_STRERRORSIZE];
41
42	switch (posixerrno) {
43	case ENOTDIR:
44	case ELOOP:
45	case EINVAL:		/* XXX sometimes this is not for files */
46	case ENAMETOOLONG:
47	case EBADF:
48		return (ISC_R_INVALIDFILE);
49	case ENOENT:
50		return (ISC_R_FILENOTFOUND);
51	case EACCES:
52	case EPERM:
53		return (ISC_R_NOPERM);
54	case EEXIST:
55		return (ISC_R_FILEEXISTS);
56	case EIO:
57		return (ISC_R_IOERROR);
58	case ENOMEM:
59		return (ISC_R_NOMEMORY);
60	case ENFILE:
61	case EMFILE:
62		return (ISC_R_TOOMANYOPENFILES);
63	case EPIPE:
64#ifdef ECONNRESET
65	case ECONNRESET:
66#endif
67#ifdef ECONNABORTED
68	case ECONNABORTED:
69#endif
70		return (ISC_R_CONNECTIONRESET);
71#ifdef ENOTCONN
72	case ENOTCONN:
73		return (ISC_R_NOTCONNECTED);
74#endif
75#ifdef ETIMEDOUT
76	case ETIMEDOUT:
77		return (ISC_R_TIMEDOUT);
78#endif
79#ifdef ENOBUFS
80	case ENOBUFS:
81		return (ISC_R_NORESOURCES);
82#endif
83#ifdef EAFNOSUPPORT
84	case EAFNOSUPPORT:
85		return (ISC_R_FAMILYNOSUPPORT);
86#endif
87#ifdef ENETDOWN
88	case ENETDOWN:
89		return (ISC_R_NETDOWN);
90#endif
91#ifdef EHOSTDOWN
92	case EHOSTDOWN:
93		return (ISC_R_HOSTDOWN);
94#endif
95#ifdef ENETUNREACH
96	case ENETUNREACH:
97		return (ISC_R_NETUNREACH);
98#endif
99#ifdef EHOSTUNREACH
100	case EHOSTUNREACH:
101		return (ISC_R_HOSTUNREACH);
102#endif
103#ifdef EADDRINUSE
104	case EADDRINUSE:
105		return (ISC_R_ADDRINUSE);
106#endif
107	case EADDRNOTAVAIL:
108		return (ISC_R_ADDRNOTAVAIL);
109	case ECONNREFUSED:
110		return (ISC_R_CONNREFUSED);
111	default:
112		isc__strerror(posixerrno, strbuf, sizeof(strbuf));
113		UNEXPECTED_ERROR(file, line, "unable to convert errno "
114				 "to isc_result: %d: %s",
115				 posixerrno, strbuf);
116		/*
117		 * XXXDCL would be nice if perhaps this function could
118		 * return the system's error string, so the caller
119		 * might have something more descriptive than "unexpected
120		 * error" to log with.
121		 */
122		return (ISC_R_UNEXPECTED);
123	}
124}
125