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/*-
* Copyright (c) 2014-2020 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __wt_errno --
* Return errno, or WT_ERROR if errno not set.
*/
int
__wt_errno(void)
{
/*
* Called when we know an error occurred, and we want the system error code, but there's some
* chance it's not set.
*/
return (errno == 0 ? WT_ERROR : errno);
}
/*
* __wt_strerror --
* WT_SESSION.strerror and wiredtiger_strerror.
*/
const char *
__wt_strerror(WT_SESSION_IMPL *session, int error, char *errbuf, size_t errlen)
{
const char *p;
/*
* Check for a WiredTiger or POSIX constant string, no buffer needed.
*/
if ((p = __wt_wiredtiger_error(error)) != NULL)
return (p);
/*
* !!!
* This function MUST handle a NULL WT_SESSION_IMPL handle.
*
* When called with a passed-in buffer, write the buffer.
* When called with a valid session handle, write the session's buffer.
* There's no way the session's buffer should be NULL if buffer format
* succeeded, but Coverity is unconvinced; regardless, a test for NULL
* isn't a bad idea given future code changes in the underlying code.
*
* Fallback to a generic message.
*/
if (errbuf != NULL && __wt_snprintf(errbuf, errlen, "error return: %d", error) == 0)
return (errbuf);
if (session != NULL && __wt_buf_fmt(session, &session->err, "error return: %d", error) == 0 &&
session->err.data != NULL)
return (session->err.data);
/* Defeated. */
return ("Unable to return error string");
}
/*
* __wt_ext_map_windows_error --
* Extension API call to map a Windows system error to a POSIX/ANSI error.
*/
int
__wt_ext_map_windows_error(WT_EXTENSION_API *wt_api, WT_SESSION *wt_session, uint32_t windows_error)
{
WT_UNUSED(wt_api);
WT_UNUSED(wt_session);
/*
* This extension API only makes sense in Windows builds, but it's hard to exclude it otherwise
* (there's no way to return an error, anyway). Call an underlying function on Windows, else panic
* so callers figure out what they're doing wrong.
*/
#ifdef _WIN32
return (__wt_map_windows_error(windows_error));
#else
WT_UNUSED(windows_error);
WT_RET_PANIC(
(WT_SESSION_IMPL *)wt_session, WT_PANIC, "unexpected attempt to map Windows error");
#endif
}
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