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-rw-r--r--lib/isc/unix/errno2result.c131
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diff --git a/lib/isc/unix/errno2result.c b/lib/isc/unix/errno2result.c
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+++ b/lib/isc/unix/errno2result.c
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+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+#include "errno2result.h"
+#include <stdbool.h>
+
+#include <isc/platform.h>
+#include <isc/result.h>
+#include <isc/strerr.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+/*%
+ * Convert a POSIX errno value into an isc_result_t. The
+ * list of supported errno values is not complete; new users
+ * of this function should add any expected errors that are
+ * not already there.
+ */
+isc_result_t
+isc___errno2result(int posixerrno, bool dolog, const char *file,
+ unsigned int line) {
+ char strbuf[ISC_STRERRORSIZE];
+
+ switch (posixerrno) {
+ case ENOTDIR:
+ case ELOOP:
+ case EINVAL: /* XXX sometimes this is not for files */
+ case ENAMETOOLONG:
+ case EBADF:
+ return (ISC_R_INVALIDFILE);
+ case ENOENT:
+ return (ISC_R_FILENOTFOUND);
+ case EACCES:
+ case EPERM:
+ return (ISC_R_NOPERM);
+ case EEXIST:
+ return (ISC_R_FILEEXISTS);
+ case EIO:
+ return (ISC_R_IOERROR);
+ case ENOMEM:
+ return (ISC_R_NOMEMORY);
+ case ENFILE:
+ case EMFILE:
+ return (ISC_R_TOOMANYOPENFILES);
+#ifdef EDQUOT
+ case EDQUOT:
+ return (ISC_R_DISCQUOTA);
+#endif /* ifdef EDQUOT */
+ case ENOSPC:
+ return (ISC_R_DISCFULL);
+#ifdef EOVERFLOW
+ case EOVERFLOW:
+ return (ISC_R_RANGE);
+#endif /* ifdef EOVERFLOW */
+ case EPIPE:
+#ifdef ECONNRESET
+ case ECONNRESET:
+#endif /* ifdef ECONNRESET */
+#ifdef ECONNABORTED
+ case ECONNABORTED:
+#endif /* ifdef ECONNABORTED */
+ return (ISC_R_CONNECTIONRESET);
+#ifdef ENOTCONN
+ case ENOTCONN:
+ return (ISC_R_NOTCONNECTED);
+#endif /* ifdef ENOTCONN */
+#ifdef ETIMEDOUT
+ case ETIMEDOUT:
+ return (ISC_R_TIMEDOUT);
+#endif /* ifdef ETIMEDOUT */
+#ifdef ENOBUFS
+ case ENOBUFS:
+ return (ISC_R_NORESOURCES);
+#endif /* ifdef ENOBUFS */
+#ifdef EAFNOSUPPORT
+ case EAFNOSUPPORT:
+ return (ISC_R_FAMILYNOSUPPORT);
+#endif /* ifdef EAFNOSUPPORT */
+#ifdef ENETDOWN
+ case ENETDOWN:
+ return (ISC_R_NETDOWN);
+#endif /* ifdef ENETDOWN */
+#ifdef EHOSTDOWN
+ case EHOSTDOWN:
+ return (ISC_R_HOSTDOWN);
+#endif /* ifdef EHOSTDOWN */
+#ifdef ENETUNREACH
+ case ENETUNREACH:
+ return (ISC_R_NETUNREACH);
+#endif /* ifdef ENETUNREACH */
+#ifdef EHOSTUNREACH
+ case EHOSTUNREACH:
+ return (ISC_R_HOSTUNREACH);
+#endif /* ifdef EHOSTUNREACH */
+#ifdef EADDRINUSE
+ case EADDRINUSE:
+ return (ISC_R_ADDRINUSE);
+#endif /* ifdef EADDRINUSE */
+ case EADDRNOTAVAIL:
+ return (ISC_R_ADDRNOTAVAIL);
+ case ECONNREFUSED:
+ return (ISC_R_CONNREFUSED);
+ default:
+ if (dolog) {
+ strerror_r(posixerrno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(file, line,
+ "unable to convert errno "
+ "to isc_result: %d: %s",
+ posixerrno, strbuf);
+ }
+ /*
+ * XXXDCL would be nice if perhaps this function could
+ * return the system's error string, so the caller
+ * might have something more descriptive than "unexpected
+ * error" to log with.
+ */
+ return (ISC_R_UNEXPECTED);
+ }
+}