structure for the mountid, but it is 32/64 bits long only, whereas
mountid is 128 bits long. Because we did not initialize the unused bits to
zero, the mountid was not always unique within a filesystem.
This makes autocad 1.3 able to start up.
Service happy. Code in libc attempts to open files in the ns filesystem, and
then uses getmountid on failure to ensure that the ns filesystem is really
mounted. We don't emulate the ns filesystem yet, but getmountid now correctly
reports that ns is not present.
Note: It seems that the mountid of the ns filesystem should always be
00000005 00000000 00000000 7fff3000
