/*++

Copyright?（c）?1989-2000?Microsoft?Corporation

Module?Name:

????AcChkSup.c

Abstract:

????This?module?implements?the?FAT?access?checking?routine


--*/

#include?“FatProcs.h“

//
//??Our?debug?trace?level
//

#define?Dbg??????????????????????????????（DEBUG_TRACE_ACCHKSUP）

NTSTATUS
FatCreateRestrictEveryoneToken（
????IN?PACCESS_TOKEN?Token
????OUT?PACCESS_TOKEN?*RestrictedToken
????）;

#ifdef?ALLOC_PRAGMA
#pragma?alloc_text（PAGE?FatCheckFileAccess）
#pragma?alloc_text（PAGE?FatCheckManageVolumeAccess）
#pragma?alloc_text（PAGE?FatCreateRestrictEveryoneToken）
#pragma?alloc_text（PAGE?FatExplicitDeviceAccessGranted）
#endif


BOOLEAN
FatCheckFileAccess?（
????PIRP_CONTEXT?IrpContext
????IN?UCHAR?DirentAttributes
????IN?PACCESS_MASK?DesiredAccess
????）

/*++

Routine?Description:

????This?routine?checks?if?a?desired?access?is?allowed?to?a?file?represented
????by?the?specified?DirentAttriubutes.

Arguments:

????DirentAttributes?-?Supplies?the?Dirent?attributes?to?check?access?for

????DesiredAccess?-?Supplies?the?desired?access?mask?that?we?are?checking?for

Return?Value:

????BOOLEAN?-?TRUE?if?access?is?allowed?and?FALSE?otherwise

--*/

{
????BOOLEAN?Result;

????DebugTrace（+1?Dbg?“FatCheckFileAccess\n“?0）;
????DebugTrace（?0?Dbg?“DirentAttributes?=?%8lx\n“?DirentAttributes）;
????DebugTrace（?0?Dbg?“DesiredAccess????=?%8lx\n“?*DesiredAccess）;

????PAGED_CODE（）;

????//
????//??This?procedures?is?programmed?like?a?string?of?filters?each
????//??filter?checks?to?see?if?some?access?is?allowed??if?it?is?not?allowed
????//??the?filter?return?FALSE?to?the?user?without?further?checks?otherwise
????//??it?moves?on?to?the?next?filter.??The?filter?check?is?to?check?for
????//??desired?access?flags?that?are?not?allowed?for?a?particular?dirent
????//

????Result?=?TRUE;

????try?{

????????//
????????//??Check?for?Volume?ID?or?Device?Dirents?these?are?not?allowed?user
????????//??access?at?all
????????//

????????if?（FlagOn（DirentAttributes?FAT_DIRENT_ATTR_VOLUME_ID）?||
????????????FlagOn（DirentAttributes?FAT_DIRENT_ATTR_DEVICE））?{

????????????DebugTrace（0?Dbg?“Cannot?access?volume?id?or?device\n“?0）;

????????????try_return（?Result?=?FALSE?）;
????????}

????????//
????????//??Check?the?desired?access?for?the?object?-?we?only?blackball?that
????????//??we?do?not?understand.??The?model?of?filesystems?using?ACLs?is?that
????????//??they?do?not?type?the?ACL?to?the?object?the?ACL?is?on.??Permissions
????????//??are?not?checked?for?consistency?vs.?the?object?type?-?dir/file.
????????//

????????if?（FlagOn（*DesiredAccess?~（DELETE?|
?????????????????????????????????????READ_CONTROL?|
?????????????????????????????????????WRITE_OWNER?|
?????????????????????????????????????WRITE_DAC?|
?????????????????????????????????????SYNCHRONIZE?|
?????????????????????????????????????ACCESS_SYSTEM_SECURITY?|
?????????????????????????????????????FIL

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-05-01?17:27??fastfat\
?????文件??????????55??2012-05-01?17:27??fastfat\dirs
?????目錄???????????0??2012-05-01?17:27??fastfat\Win7\
?????文件???????11909??2010-02-08?19:29??fastfat\Win7\acchksup.c
?????文件??????156596??2010-02-08?19:29??fastfat\Win7\allocsup.c
?????文件???????50689??2010-02-08?19:29??fastfat\Win7\cachesup.c
?????文件???????35122??2010-02-08?19:29??fastfat\Win7\cleanup.c
?????文件???????34516??2010-02-08?19:29??fastfat\Win7\close.c
?????文件??????192076??2010-02-08?19:29??fastfat\Win7\create.c
?????文件????????9700??2010-02-08?19:29??fastfat\Win7\devctrl.c
?????文件???????96165??2010-02-08?19:29??fastfat\Win7\deviosup.c
?????文件???????48849??2010-02-08?19:29??fastfat\Win7\dirctrl.c
?????文件??????????16??2012-05-01?17:27??fastfat\Win7\dirs
?????文件??????107307??2010-02-08?19:29??fastfat\Win7\dirsup.c
?????文件????????9862??2010-02-08?19:29??fastfat\Win7\dumpsup.c
?????文件???????57327??2010-02-08?19:29??fastfat\Win7\ea.c
?????文件??????108410??2010-02-08?19:29??fastfat\Win7\easup.c
?????文件?????????319??2010-02-08?19:29??fastfat\Win7\fastfat.rc
?????文件???????27208??2010-02-08?17:24??fastfat\Win7\fat.h
?????文件???????36424??2010-02-08?19:29??fastfat\Win7\fatdata.c
?????文件???????10045??2010-02-08?19:29??fastfat\Win7\fatdata.h
?????文件???????21418??2010-02-08?19:29??fastfat\Win7\fatinit.c
?????文件???????68982??2010-02-08?19:29??fastfat\Win7\fatprocs.h
?????文件???????47373??2010-02-08?19:29??fastfat\Win7\fatstruc.h
?????文件??????141900??2010-02-08?19:29??fastfat\Win7\fileinfo.c
?????文件???????14262??2010-02-08?19:29??fastfat\Win7\filobsup.c
?????文件???????31850??2010-02-08?19:29??fastfat\Win7\flush.c
?????文件??????214914??2010-02-08?19:29??fastfat\Win7\fsctrl.c
?????文件???????11728??2010-02-08?19:29??fastfat\Win7\fspdisp.c
?????文件????????1409??2010-02-08?17:24??fastfat\Win7\lfn.h
?????文件???????17788??2010-02-08?19:29??fastfat\Win7\lockctrl.c
............此處省略149個(gè)文件信息