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/*-
* Copyright (c) 2014-2015 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 --
* POSIX implementation of wiredtiger_strerror.
*/
const char *
__wt_strerror(int error)
{
const char *p;
/*
* POSIX errors are non-negative integers; check for 0 explicitly
* in-case the underlying strerror doesn't handle 0, some don't.
*/
if (error == 0)
return ("Successful return: 0");
if (error > 0 && (p = strerror(error)) != NULL)
return (p);
return (NULL);
}
/*
* __wt_strerror_r --
* POSIX implementation of wiredtiger_strerror_r.
*/
int
__wt_strerror_r(int error, char *buf, size_t buflen)
{
const char *p;
/* Require at least 2 bytes, printable character and trailing nul. */
if (buflen < 2)
return (ENOMEM);
/*
* Check for POSIX errors then fallback to something generic. Copy the
* string into the user's buffer, return success if anything printed.
*/
p = __wt_strerror(error);
if (p != NULL && snprintf(buf, buflen, "%s", p) > 0)
return (0);
/* Fallback to a generic message, then guess it's a memory problem. */
return (
snprintf(buf, buflen, "error return: %d", error) > 0 ? 0 : ENOMEM);
}
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