mirror of
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146 lines
2.5 KiB
C
146 lines
2.5 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1999-2002
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: os_errno.c,v 11.10 2002/07/12 04:05:00 mjc Exp $";
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#endif /* not lint */
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#include "db_int.h"
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/*
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* __os_get_errno --
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* Return the value of errno.
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*/
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int
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__os_get_errno()
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{
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/* This routine must be able to return the same value repeatedly. */
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return (errno);
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}
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/*
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* __os_set_errno --
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* Set the value of errno.
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*/
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void
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__os_set_errno(evalue)
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int evalue;
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{
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errno = evalue;
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}
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/*
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* __os_win32_errno --
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* Return the last Windows error as an errno.
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* We give generic error returns:
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*
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* EFAULT means Win* call failed,
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* and GetLastError provided no extra info.
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*
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* EIO means error on Win* call.
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* and we were unable to provide a meaningful errno for this Windows
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* error. More information is only available by setting a breakpoint
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* here.
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*
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* PUBLIC: #if defined(DB_WIN32)
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* PUBLIC: int __os_win32_errno __P((void));
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* PUBLIC: #endif
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*/
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int
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__os_win32_errno(void)
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{
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DWORD last_error;
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int ret;
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/* Ignore errno - we used to check it here. */
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last_error = GetLastError();
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/*
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* Take our best guess at translating some of the Windows error
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* codes. We really care about only a few of these.
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*/
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switch (last_error) {
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case ERROR_FILE_NOT_FOUND:
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case ERROR_INVALID_DRIVE:
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case ERROR_PATH_NOT_FOUND:
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ret = ENOENT;
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break;
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case ERROR_NO_MORE_FILES:
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case ERROR_TOO_MANY_OPEN_FILES:
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ret = EMFILE;
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break;
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case ERROR_ACCESS_DENIED:
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ret = EPERM;
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break;
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case ERROR_INVALID_HANDLE:
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ret = EBADF;
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break;
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case ERROR_NOT_ENOUGH_MEMORY:
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ret = ENOMEM;
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break;
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case ERROR_DISK_FULL:
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ret = ENOSPC;
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case ERROR_ARENA_TRASHED:
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case ERROR_BAD_COMMAND:
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case ERROR_BAD_ENVIRONMENT:
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case ERROR_BAD_FORMAT:
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case ERROR_GEN_FAILURE:
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case ERROR_INVALID_ACCESS:
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case ERROR_INVALID_BLOCK:
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case ERROR_INVALID_DATA:
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case ERROR_READ_FAULT:
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case ERROR_WRITE_FAULT:
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ret = EFAULT;
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break;
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case ERROR_FILE_EXISTS:
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case ERROR_ALREADY_EXISTS:
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ret = EEXIST;
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break;
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case ERROR_NOT_SAME_DEVICE:
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ret = EXDEV;
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break;
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case ERROR_WRITE_PROTECT:
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ret = EACCES;
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break;
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case ERROR_NOT_READY:
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ret = EBUSY;
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break;
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case ERROR_LOCK_VIOLATION:
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case ERROR_SHARING_VIOLATION:
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ret = EBUSY;
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break;
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case ERROR_RETRY:
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ret = EINTR;
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break;
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case 0:
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ret = EFAULT;
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break;
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default:
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ret = EIO; /* Generic error. */
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break;
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}
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return (ret);
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}
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