[英]“Access Denied” on writing on Mailslot in Windows Service program
I use Mailslots (in Delphi 7) for inter-programs dialog and all is OK. 我使用Mailslots(在Delphi 7中)进行程序间对话框,一切正常。
But when I use one of my program (in Windows XP) as Windows service I have a message "Mailslot Access Denied", when another (classical admin user's) program try to write to the mailslot. 但是,当我将其中一个程序(在Windows XP中)用作Windows服务时,会出现一条消息“ Mailslot Access Denied”,而另一个(经典管理员用户)程序尝试写入Mailslot。 I Understand that it is surely a rights problem since service have SYSTEM rights but...what is the solution ? 我知道这肯定是一个权限问题,因为服务具有SYSTEM权限,但是...解决方案是什么?
When calling CreateMailslot()
, specify a SECURITY_DESCRIPTOR
that allows all access to the mailslot, eg: 调用CreateMailslot()
,请指定一个SECURITY_DESCRIPTOR
,它允许对邮槽的所有访问,例如:
var
...
sd: SECURITY_DESCRIPTOR;
sa: SECURITY_ATTRIBUTES;
begin
...
InitializeSecurityDescriptor(@sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(@sd, True, nil, False);
sa.lpSecurityDescriptor := @sd;
sa.bInheritHandle := Frue;
... := CreateMailslot(..., @sa);
...
end;
I use C++ Embarcardero 2010, and I have to do some modifications to the solution of Remy Lebeau because the CreateMailSlot function receive a pointer of type SECURITY_ATTRIBUTES *, and not a pointer of type SECURITY_DESCRIPTOR *. 我使用C ++ Embarcardero 2010,并且必须对Remy Lebeau的解决方案进行一些修改,因为CreateMailSlot函数接收的是类型为SECURITY_ATTRIBUTES *的指针,而不是类型为SECURITY_DESCRIPTOR *的指针。
My solution in C++ is: 我在C ++中的解决方案是:
SECURITY_DESCRIPTOR sd;
InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sd, true, NULL, false);
SECURITY_ATTRIBUTES sa;
sa.lpSecurityDescriptor=&sd;
sa.bInheritHandle=true;
this->pHandleMailSlot = CreateMailslot("your mail slot path", 0, -1, &sa);
Note: In my case I've three applications: 注意:就我而言,我有三个应用程序:
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