4 option "mount" - "New mount namespace" flag off
5 option "uname" - "New uname" flag off
6 option "ipc" - "New IPC context" flag off
7 option "mask" - "Pass user defined flag" int typestr="MASK" no multiple
8 option "chroot" - "Chroot in the specified directory" string typestr="DIRECTORY" no
9 option "uid" - "Change to the specified UID" int typestr="UID" no
10 option "gid" - "Add the specified GID" int typestr="GID" no multiple