os_stat.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: os_stat.c,v 11.22 2002/07/12 18:56:56 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <string.h>
- #endif
- #include "db_int.h"
- /*
- * __os_exists --
- * Return if the file exists.
- *
- * PUBLIC: int __os_exists __P((const char *, int *));
- */
- int
- __os_exists(path, isdirp)
- const char *path;
- int *isdirp;
- {
- int ret;
- DWORD attrs;
- if (DB_GLOBAL(j_exists) != NULL)
- return (DB_GLOBAL(j_exists)(path, isdirp));
- ret = 0;
- do {
- attrs = GetFileAttributes(path);
- if (attrs == (DWORD)-1)
- ret = __os_win32_errno();
- } while (ret == EINTR);
- if (ret != 0)
- return (ret);
- if (isdirp != NULL)
- *isdirp = (attrs & FILE_ATTRIBUTE_DIRECTORY);
- return (0);
- }
- /*
- * __os_ioinfo --
- * Return file size and I/O size; abstracted to make it easier
- * to replace.
- *
- * PUBLIC: int __os_ioinfo __P((DB_ENV *, const char *,
- * PUBLIC: DB_FH *, u_int32_t *, u_int32_t *, u_int32_t *));
- */
- int
- __os_ioinfo(dbenv, path, fhp, mbytesp, bytesp, iosizep)
- DB_ENV *dbenv;
- const char *path;
- DB_FH *fhp;
- u_int32_t *mbytesp, *bytesp, *iosizep;
- {
- int ret;
- BY_HANDLE_FILE_INFORMATION bhfi;
- unsigned __int64 filesize;
- if (DB_GLOBAL(j_ioinfo) != NULL)
- return (DB_GLOBAL(j_ioinfo)(path,
- fhp->fd, mbytesp, bytesp, iosizep));
- retry: if (!GetFileInformationByHandle(fhp->handle, &bhfi)) {
- if ((ret = __os_win32_errno()) == EINTR)
- goto retry;
- __db_err(dbenv,
- "GetFileInformationByHandle: %s", strerror(ret));
- return (ret);
- }
- filesize = ((unsigned __int64)bhfi.nFileSizeHigh << 32) +
- bhfi.nFileSizeLow;
- /* Return the size of the file. */
- if (mbytesp != NULL)
- *mbytesp = (u_int32_t)(filesize / MEGABYTE);
- if (bytesp != NULL)
- *bytesp = (u_int32_t)(filesize % MEGABYTE);
- /* The filesystem blocksize is not easily available. */
- if (iosizep != NULL)
- *iosizep = DB_DEF_IOSIZE;
- return (0);
- }