On Wed, Apr 28, 2010 at 1:54 AM, Munipradeep Beerakam
<[email protected]> wrote:
> Hi,
>
> I noticed that mqns test cases are failing. I am using March 2010 LTP.
> After changing mq_open syscall in mqns_01.c file, test is passing. Same
> thing is happening w.r.t. other mqns test cases. Below is the change I
> made.
>
> Changed
> mqd = syscall(__NR_mq_open, SLASH_MQ1, O_RDWR|O_CREAT|O_EXCL,0777,
> NULL);
>
> to
> mqd = mq_open(SLASH_MQ1, O_RDWR|O_CREAT|O_EXCL, 0777, NULL);
>
> Failure output I got is below:
> # ./mqns_01
> posixmq_namespace_01 0 TINFO : Testing posix mq namespaces through
> unshare(2).
>
> mq_open: Permission denied
> posixmq_namespace_01 1 TFAIL : mq_open failed
>
> After changing as above, I got the below output:
> # ./mqns_01
> posixmq_namespace_01 0 TINFO : Testing posix mq namespaces through
> unshare(2).
>
> posixmq_namespace_01 0 TINFO : Checking namespaces isolation from
> parent to child
>
> posixmq_namespace_01 1 TPASS : child process didn't find mqueue
>
> So, my question is that what is the difference between the two, i.e.,
> the previous one and the changed one. Both are calling the same mq_open
> system call. But first one is failing whereas the second one is
> succeeding.
>
> So, do we need to modify all mqns test cases to the new form?
Track down the execution path by first starting with glibc. It
might be a library vs kernel mismatch or a bug. Make sure that the
syscall number matches per your architecture, determine whether or not
your architecture has issues executing code in a biarch manner (64-bit
on 32-bit) if it applies.
HTH,
-Garrett
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