/*用戶訪問權限控制*/
#include?

#include?“filesys.h“

unsigned?int?access（user_idinodemode）

unsigned?int?user_id;??//用戶ID

struct?inode?*inode;???//索引節點

unsigned?short?mode;//定義用戶有讀/寫的權利

{
???switch（mode）

???{

???case?READ://可讀?有不有該用戶并且該用戶有不有讀的權

???????if（inode->di_mode?&?ODIREAD）?return?1;?

??????if（（inode->di_mode?&?GDIREAD）?&&?

????????????????????????????（user[user_id].u_gid==inode->di_gid））?return?1;???

????????if（（inode->di_mode?&?UDIREAD）?&&?

????????????????????????????（user[user_id].u_uid==inode->di_uid））?return?1;

???????return?0;

???case?WRITE://可寫

???????if（inode->di_mode?&?ODIWRITE）??return?1;

???????if（（inode->di_mode?&?GDIWRITE）&&????????????

????????????（user[user_id].u_gid==inode->di_gid））?return?1;???

???????if（（inode->di_mode?&?UDIWRITE）&&

????????????（user[user_id].u_uid==inode->di_uid））?return?1;

???????return?0;

???case?EXICUTE://可執行

???????if（inode->di_mode?&?ODIEXICUTE）?return?1;

???????if（（inode->di_mode?&?GDIEXICUTE）&&???

????????????（user[user_id].u_gid==inode->di_gid））?return?1;

???????if（（inode->di_mode?&?UDIEXICUTE）&&???

????????????（user[user_id].u_uid==inode->di_uid））?return?1;

???????return?0;

???case?DEFAULTMODE:

???????return?1;

???defualt:

???????return?0;

????}

?}

?屬性????????????大小?????日期????時間???名稱
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?????文件???????1375??2010-09-15?20:51??filesys源代碼\access.c

?????文件???????2381??2010-09-15?20:51??filesys源代碼\ballfre.c

?????文件???????1136??2010-09-15?20:51??filesys源代碼\cat.c

?????文件????????334??2010-09-15?20:51??filesys源代碼\close.c

?????文件???????2127??2010-09-15?20:51??filesys源代碼\creat.c

?????文件???????1047??2010-09-15?20:51??filesys源代碼\delete.c

?????文件???????4621??2010-09-15?20:51??filesys源代碼\dir.c

?????文件????????255??2010-09-15?20:51??filesys源代碼\dirlt.c

?????文件???????5717??2016-07-12?08:58??filesys源代碼\filesys.h

?????文件???????3980??2010-09-15?20:51??filesys源代碼\format.c

?????文件????????874??2010-09-15?20:51??filesys源代碼\halt.c

?????文件???????2102??2010-09-16?15:23??filesys源代碼\iallfre.c

?????文件???????2472??2010-09-15?20:51??filesys源代碼\iget.c

?????文件???????1604??2010-09-15?20:51??filesys源代碼\install.c

?????文件???????1395??2010-09-15?20:51??filesys源代碼\log.c

?????文件???????4621??2010-09-15?20:51??filesys源代碼\main.c

?????文件???????4890??2016-07-12?09:03??filesys源代碼\main.o

?????文件???????1023??2010-09-15?20:51??filesys源代碼\name.c

?????文件???????1574??2010-09-15?20:51??filesys源代碼\open.c

?????文件???????3765??2010-09-15?20:51??filesys源代碼\rdwt.c

?????文件???????1321??2010-09-15?20:51??filesys源代碼\regist.c

?????文件????????868??2010-09-15?20:51??filesys源代碼\vi.c

????..AD...?????????0??2016-07-12?09:03??filesys源代碼

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????????????????49482????????????????????23