shm_unlink: failed openposixtest 9-1

[cocobean]

Test that shm_unlink() sets errno = EACCES if permission is denied to unlink the named shared memory object.

Steps:

1. Create a shared memory object.
2. Set his effective user id to another user id which is not root.
3. Try to unlink the name. If it fails: set the effective user id to real user id and unlink.

NOTE: In most cases, this test will be unresolved if not run by root.

Ref: ​https://github.com/haiku/open_posix_testsuite/blob/master/conformance/interfaces/shm_unlink/9-1.c

Tested on: hrev56630 x64

[cocobean]

As of UNIX 2003, these tests are considered OPTIONAL. (don't need to implement/fix at this time)

Please close this ticket.

[pulkomandy]

Can you please stop opening tickets and then ask to close them a few months later? It is wasting everyone's time.