[LTP] : drop test pidns03 ?

[Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>]

I am not sure about the original intent of pidns03 test case but I think
the test is expected to fail :-(

The header for this test says:

	* Verify that:
	* 1. When parent, clone a process with flag CLONE_NEWPID, see the
	* process id of the parent is existing after mounting /proc

The test passes in the parent-pid from init-pid-ns and looks for that
pid in the child's mount of /proc.

But for the CLONE_NEWPID child, parent process should appear to have a
pid == 0. The pid of the parent in the initial pid namespace must NOT
be visible to the child - in fact a different process can have that pid.

I am not surprised the test fails - I am curious to know the version of
the kernel when this test reliably passed - if at all. I tried this on
2.6.29 and 2.6.34-rc5 and it fails reliably.

I dug through my history and see that this test was part of a 6-patch set,
We did have some comments on the coding style on the set, but we seem to
have missed the intent of this test :-(.

Do we have any other history of this test ? If not, I think we should either
drop the test or modify the test to verify the opposite (i.e.  verify that
the opendir() in the test fails with ENOENT).

Sukadev

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