Directories on an NT NTFS file system have two different sets of permissions.
The first set of permissions is the ACL set on the directory itself, this is
usually displayed in the first set of parentheses in the normal "RW" NT
style. This first set of permissions is created by Samba in exactly the same
way as normal file permissions are, described above, and is displayed in the
same way.
The second set of directory permissions has no real meaning in the UNIX
permissions world and represents the "inherited" permissions that any file
created within this directory would inherit.
目录权限的第二种设定方法在UNIX权限world中没有实际意义,并且表现为和目录一起建
立的任何文件应该继承的“继承”权限。
Samba synthesises these inherited permissions for NT by returning as an NT
ACL the UNIX permission mode that a new file created by Samba on this share
would receive.