c++ - 我需要从 GetNamedSecurityInfo API 中释放哪些返回参数？

Question

当我调用 GetNamedSecurityInfo API 并且它成功了，MSDN 指出我需要在 ppSecurityDescriptor 上调用 LocalFree，但是 ppDacl 和 ppSacl?

Answer 1

根据 MSDN :

A pointer to a variable that receives a pointer to the owner SID in the security descriptor

A pointer to a variable that receives a pointer to the primary group SID in the returned security descriptor

A pointer to a variable that receives a pointer to the DACL in the returned security descriptor

A pointer to a variable that receives a pointer to the SACL in the returned security descriptor

those parameters will point to the corresponding parameters in the security descriptor returned in ppSecurityDescriptor.

您只需要释放 ppSecurityDescriptor，因为其他指针指向安全描述符中的字段。