errno2result.c revision 290001 
1/*
2 * Copyright (C) 2004, 2005, 2007, 2011, 2012  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000-2002  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id$ */
19
20/*! \file */
21
22#include <config.h>
23
24#include <isc/result.h>
25#include <isc/strerror.h>
26#include <isc/util.h>
27
28#include "errno2result.h"
29
30/*%
31 * Convert a POSIX errno value into an isc_result_t.  The
32 * list of supported errno values is not complete; new users
33 * of this function should add any expected errors that are
34 * not already there.
35 */
36isc_result_t
37isc___errno2result(int posixerrno, const char *file, unsigned int line) {
38	char strbuf[ISC_STRERRORSIZE];
39
40	switch (posixerrno) {
41	case ENOTDIR:
42	case ELOOP:
43	case EINVAL:		/* XXX sometimes this is not for files */
44	case ENAMETOOLONG:
45	case EBADF:
46		return (ISC_R_INVALIDFILE);
47	case ENOENT:
48		return (ISC_R_FILENOTFOUND);
49	case EACCES:
50	case EPERM:
51		return (ISC_R_NOPERM);
52	case EEXIST:
53		return (ISC_R_FILEEXISTS);
54	case EIO:
55		return (ISC_R_IOERROR);
56	case ENOMEM:
57		return (ISC_R_NOMEMORY);
58	case ENFILE:
59	case EMFILE:
60		return (ISC_R_TOOMANYOPENFILES);
61	case EPIPE:
62#ifdef ECONNRESET
63	case ECONNRESET:
64#endif
65#ifdef ECONNABORTED
66	case ECONNABORTED:
67#endif
68		return (ISC_R_CONNECTIONRESET);
69#ifdef ENOTCONN
70	case ENOTCONN:
71		return (ISC_R_NOTCONNECTED);
72#endif
73#ifdef ETIMEDOUT
74	case ETIMEDOUT:
75		return (ISC_R_TIMEDOUT);
76#endif
77#ifdef ENOBUFS
78	case ENOBUFS:
79		return (ISC_R_NORESOURCES);
80#endif
81#ifdef EAFNOSUPPORT
82	case EAFNOSUPPORT:
83		return (ISC_R_FAMILYNOSUPPORT);
84#endif
85#ifdef ENETDOWN
86	case ENETDOWN:
87		return (ISC_R_NETDOWN);
88#endif
89#ifdef EHOSTDOWN
90	case EHOSTDOWN:
91		return (ISC_R_HOSTDOWN);
92#endif
93#ifdef ENETUNREACH
94	case ENETUNREACH:
95		return (ISC_R_NETUNREACH);
96#endif
97#ifdef EHOSTUNREACH
98	case EHOSTUNREACH:
99		return (ISC_R_HOSTUNREACH);
100#endif
101#ifdef EADDRINUSE
102	case EADDRINUSE:
103		return (ISC_R_ADDRINUSE);
104#endif
105	case EADDRNOTAVAIL:
106		return (ISC_R_ADDRNOTAVAIL);
107	case ECONNREFUSED:
108		return (ISC_R_CONNREFUSED);
109	default:
110		isc__strerror(posixerrno, strbuf, sizeof(strbuf));
111		UNEXPECTED_ERROR(file, line, "unable to convert errno "
112				 "to isc_result: %d: %s",
113				 posixerrno, strbuf);
114		/*
115		 * XXXDCL would be nice if perhaps this function could
116		 * return the system's error string, so the caller
117		 * might have something more descriptive than "unexpected
118		 * error" to log with.
119		 */
120		return (ISC_R_UNEXPECTED);
121	}
122}
123