1/*
2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
15 */
16
17/* $Id: errno2result.c,v 1.5 2020/09/14 08:40:44 florian Exp $ */
18
19/*! \file */
20
21#include <errno.h>
22#include <string.h>
23
24#include <isc/result.h>
25#include <isc/util.h>
26
27#include "errno2result.h"
28
29/*%
30 * Convert a POSIX errno value into an isc_result_t.  The
31 * list of supported errno values is not complete; new users
32 * of this function should add any expected errors that are
33 * not already there.
34 */
35isc_result_t
36isc___errno2result(int posixerrno, int dolog,
37		   const char *file, unsigned int line)
38{
39	switch (posixerrno) {
40	case ENOTDIR:
41	case ELOOP:
42	case EINVAL:		/* XXX sometimes this is not for files */
43	case ENAMETOOLONG:
44	case EBADF:
45		return (ISC_R_INVALIDFILE);
46	case ENOENT:
47		return (ISC_R_FILENOTFOUND);
48	case EACCES:
49	case EPERM:
50		return (ISC_R_NOPERM);
51	case EEXIST:
52		return (ISC_R_FILEEXISTS);
53	case EIO:
54		return (ISC_R_IOERROR);
55	case ENOMEM:
56		return (ISC_R_NOMEMORY);
57	case ENFILE:
58	case EMFILE:
59		return (ISC_R_TOOMANYOPENFILES);
60	case EOVERFLOW:
61		return (ISC_R_RANGE);
62	case EPIPE:
63	case ECONNRESET:
64	case ECONNABORTED:
65		return (ISC_R_CONNECTIONRESET);
66	case ENOTCONN:
67		return (ISC_R_NOTCONNECTED);
68	case ETIMEDOUT:
69		return (ISC_R_TIMEDOUT);
70	case ENOBUFS:
71		return (ISC_R_NORESOURCES);
72	case EAFNOSUPPORT:
73		return (ISC_R_FAMILYNOSUPPORT);
74	case ENETDOWN:
75		return (ISC_R_NETDOWN);
76	case EHOSTDOWN:
77		return (ISC_R_HOSTDOWN);
78	case ENETUNREACH:
79		return (ISC_R_NETUNREACH);
80	case EHOSTUNREACH:
81		return (ISC_R_HOSTUNREACH);
82	case EADDRINUSE:
83		return (ISC_R_ADDRINUSE);
84	case EADDRNOTAVAIL:
85		return (ISC_R_ADDRNOTAVAIL);
86	case ECONNREFUSED:
87		return (ISC_R_CONNREFUSED);
88	default:
89		if (dolog) {
90			UNEXPECTED_ERROR(file, line, "unable to convert errno "
91					 "to isc_result: %d: %s",
92					 posixerrno, strerror(posixerrno));
93		}
94		/*
95		 * XXXDCL would be nice if perhaps this function could
96		 * return the system's error string, so the caller
97		 * might have something more descriptive than "unexpected
98		 * error" to log with.
99		 */
100		return (ISC_R_UNEXPECTED);
101	}
102}
103