我需要从GetNamedSecurityInfo API中解除哪些返回的参数？

Question

当我调用GetNamedSecurityInfo API并且它成功时，MSDN声明我需要在ppSecurityDescriptor上调用LocalFree ，但是ppDacl和ppSacl呢？

Answer 1

According to 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.

You only need to free ppSecurityDescriptor as the other pointers point to the fields within the security descriptor.