?如何用vb程序设置文件夹权限

本文探讨了使用VB程序在Windows 2000和2003系统中对NTFS格式磁盘上的文件和文件夹进行用户权限操作时遇到的问题。特别是当使用继承属性时出现的权限顺序错误提示。

关于怎样用vb程序对win2000和win2003下NTFS格式的磁盘上的文件及文件夹进行用户权限操作,在论坛上发贴和在msdn搜到程序在对权限操作的时候都出现问题:
在文件夹使用继承属性时,用程序设置过文件夹的权限后,打开文件夹的"属性-》安全"标签的时候提示“XXXX 上的权限顺序不正确,可能导致某些数据无法作用。请按“确定”以继续并将权限正确排序,或按“取消”来复位权限。”
在在文件夹不是使用继承属性时,设置后权限正常!

问题一直未解决希望各位能指教,谢谢!
论坛帖子地址:http://community.youkuaiyun.com/Expert/topic/5685/5685970.xml?temp=.499798
       http://community.youkuaiyun.com/Expert/topic/5726/5726633.xml?temp=.5362818

程序如下:

Option Explicit

Private Const FOLDER_PATH = "f:/Test"

' Success status of high level access control APIs
Private Const ERROR_SUCCESS = 0&

' Type of Securable Object we are operating in this sample code
Private Const SE_FILE_OBJECT = 1&
Const KEY_ALL_ACCESS = KEY_QUERY_VALUE + KEY_SET_VALUE + KEY_CREATE_SUB_KEY + KEY_ENUMERATE_SUB_KEYS + KEY_NOTIFY + KEY_CREATE_LINK + READ_CONTROL
' The Security Information constants required
Private Const DACL_SECURITY_INFORMATION = 4&
Private Const SET_ACCESS = 2&

Private Enum SE_OBJECT_TYPE
SE_UNKNOWN_OBJECT_TYPE = 0&
SE_FILE_OBJECT = 1&
SE_SERVICE = 2&
SE_PRINTER = 3&
SE_REGISTRY_KEY = 4&
SE_LMSHARE = 5&
SE_KERNEL_OBJECT = 6&
SE_WINDOW_OBJECT = 7&
End Enum
' Standard access rights extracted from WinNT.h
Private Const SYNCHRONIZE = &H100000
Private Const READ_CONTROL = &H20000
Private Const WRITE_DAC = &H40000
Private Const WRITE_OWNER = &H80000
Private Const STANDARD_RIGHTS_READ = (READ_CONTROL)
Private Const STANDARD_RIGHTS_WRITE = (READ_CONTROL)
Private Const DELETE = &H10000

' Generic access rights extracted from WinNT.h
Private Const GENERIC_ALL = &H10000000
Private Const GENERIC_EXECUTE = &H20000000
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000

' Inheritance Flags
Private Const CONTAINER_INHERIT_ACE = &H2
Private Const OBJECT_INHERIT_ACE = &H1

' The TRUSTEE structure identifies the user account, group account, or logon session
' to which an ACE applies. The structure can use a name or a security identifier (SID)
' to identify the trustee.

' Access control APIs, such as SetEntriesInAcl and GetExplicitEntriesFromAcl, use this
' structure to identify the account associated with the access-control or audit-control
' information in an EXPLICIT_ACCESS structure.
Private Type TRUSTEE
pMultipleTrustee As Long
MultipleTrusteeOperation As Long
TrusteeForm As Long
TrusteeType As Long
ptstrName As String
End Type

' EXPLICIT_ACCESS structure that specifies access-control information for a specified
' trustee such as access mask as well as inheritance flags
Private Type EXPLICIT_ACCESS
grfAccessPermissions As Long
grfAccessMode As Long
grfInheritance As Long
pTRUSTEE As TRUSTEE
End Type

' High Level access control API declarations
Private Declare Sub BuildExplicitAccessWithName Lib "Advapi32.dll" Alias _
"BuildExplicitAccessWithNameA" _
(ea As Any, _
ByVal TrusteeName As String, _
ByVal AccessPermissions As Long, _
ByVal AccessMode As Integer, _
ByVal Inheritance As Long)

Private Declare Function SetEntriesInAcl Lib "Advapi32.dll" Alias _
"SetEntriesInAclA" _
(ByVal CountofExplicitEntries As Long, _
ea As Any, _
ByVal OldAcl As Long, _
NewAcl As Long) As Long

Private Declare Function GetNamedSecurityInfo Lib "Advapi32.dll" Alias _
"GetNamedSecurityInfoA" _
(ByVal ObjName As String, _
ByVal SE_OBJECT_TYPE As Long, _
ByVal SecInfo As Long, _
ByVal pSid As Long, _
ByVal pSidGroup As Long, _
pDacl As Long, _
ByVal pSacl As Long, _
pSecurityDescriptor As Long) As Long

Private Declare Function SetNamedSecurityInfo Lib "Advapi32.dll" Alias _
"SetNamedSecurityInfoA" _
(ByVal ObjName As String, _
ByVal SE_OBJECT As Long, _
ByVal SecInfo As Long, _
ByVal pSid As Long, _
ByVal pSidGroup As Long, _
ByVal pDacl As Long, _
ByVal pSacl As Long) As Long

Private Declare Function LocalFree Lib "kernel32" (ByVal hMem As Long) As Long

Private Sub Command1_Click()

Dim result As Long
Dim pSecDesc As Long
Dim ea As EXPLICIT_ACCESS
Dim pNewDACL As Long
Dim pOldDACL As Long

' Get the DACL information of the folder using GetNamedSecurityInfo() API.
' SE_FILE_OBJECT constant says that the named securable object is a file or folder
result = GetNamedSecurityInfo(FOLDER_PATH, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, 0&, 0&, pOldDACL, 0&, pSecDesc)
If result = ERROR_SUCCESS Then

' Construct an EXPLICIT_ACCESS structure for Everyone with GENERIC_ALL access that will apply for c:/test1
' as well as subfolder and files using BuildExplicitAccessWithName() API
BuildExplicitAccessWithName ea, "EVERYONE", GENERIC_ALL, SET_ACCESS, CONTAINER_INHERIT_ACE Or OBJECT_INHERIT_ACE

' Merge constructed EXPLICIT_ACCESS structure to the existing DACL and get an updated DACL in memory from
' SetEntriesInAcl() API
result = SetEntriesInAcl(1, ea, pOldDACL, pNewDACL)
If result = ERROR_SUCCESS Then
MsgBox "SetEntriesInAcl succeeded"

' Call SetNamedSecurityInfo() API with the updated DACL in memory to change the DACL of c:/test folder
result = SetNamedSecurityInfo(FOLDER_PATH, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, 0&, 0&, pNewDACL, 0&)
If result = ERROR_SUCCESS Then
MsgBox "SetNamedSecurityInfo succeeded"
Else
MsgBox "SetNamedSecurityInfo failed with error code : " & result
End If

' Free the memory allocated for the new DACL by the SetEntriesInAcl() API, using LocalFree() API
LocalFree pNewDACL
Else
MsgBox "SetEntriesInAcl failed with error code : " & result
End If

' Free the memory allocated for the security descriptor by the GetNamedSecurityInfo() API, using LocalFree() API
LocalFree pSecDesc
Else
MsgBox "GetNamedSecurityInfo failed with error code : " & result
End If
End Sub

评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值