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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1999, 2000
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: os_errno.c,v 11.5 2000/11/30 00:58:43 ubell Exp $";
#endif /* not lint */
#include "db_int.h"
/*
* __os_get_errno --
* Return the value of errno.
*/
int
__os_get_errno()
{
/* This routine must be able to return the same value repeatedly. */
return (errno);
}
/*
* __os_set_errno --
* Set the value of errno.
*/
void
__os_set_errno(evalue)
int evalue;
{
errno = evalue;
}
/*
* __os_win32_errno --
* Return the last Windows error as an errno.
* We give generic error returns:
*
* EFAULT means Win* call failed,
* and GetLastError provided no extra info.
*
* EIO means error on Win* call.
* and we were unable to provide a meaningful errno for this Windows
* error. More information is only available by setting a breakpoint
* here.
*
* PUBLIC: #if defined(DB_WIN32)
* PUBLIC: int __os_win32_errno __P((void));
* PUBLIC: #endif
*/
int
__os_win32_errno(void)
{
DWORD last_error;
int ret;
/*
* It's possible that errno was set after the error.
* The caller must take care to set it to 0 before
* any system operation.
*/
if (__os_get_errno() != 0)
return (__os_get_errno());
last_error = GetLastError();
/*
* Take our best guess at translating some of the Windows error
* codes. We really care about only a few of these.
*/
switch (last_error) {
case ERROR_FILE_NOT_FOUND:
case ERROR_INVALID_DRIVE:
case ERROR_PATH_NOT_FOUND:
ret = ENOENT;
break;
case ERROR_NO_MORE_FILES:
case ERROR_TOO_MANY_OPEN_FILES:
ret = EMFILE;
break;
case ERROR_ACCESS_DENIED:
ret = EPERM;
break;
case ERROR_INVALID_HANDLE:
ret = EBADF;
break;
case ERROR_NOT_ENOUGH_MEMORY:
ret = ENOMEM;
break;
case ERROR_DISK_FULL:
ret = ENOSPC;
case ERROR_ARENA_TRASHED:
case ERROR_BAD_COMMAND:
case ERROR_BAD_ENVIRONMENT:
case ERROR_BAD_FORMAT:
case ERROR_GEN_FAILURE:
case ERROR_INVALID_ACCESS:
case ERROR_INVALID_BLOCK:
case ERROR_INVALID_DATA:
case ERROR_READ_FAULT:
case ERROR_WRITE_FAULT:
ret = EFAULT;
break;
case ERROR_FILE_EXISTS:
ret = EEXIST;
break;
case ERROR_NOT_SAME_DEVICE:
ret = EXDEV;
break;
case ERROR_WRITE_PROTECT:
ret = EACCES;
break;
case ERROR_NOT_READY:
ret = EBUSY;
break;
case ERROR_LOCK_VIOLATION:
case ERROR_SHARING_VIOLATION:
ret = EBUSY;
break;
case 0:
ret = EFAULT;
break;
default:
ret = EIO; /* Generic error. */
break;
}
return (ret);
}
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