[LTP] [PATCH] shmget03: fix test when some shm segments already exist

[Alexey Kodanev]

Hi Li,
On 06.07.2021 15:49, Li Wang wrote:
> Hi Alexey,
> 
> On Tue, Jul 6, 2021 at 6:59 PM Alexey Kodanev <aleksei.kodanev@bell-sw.com <mailto:aleksei.kodanev@bell-sw.com>> wrote:
> 
>     It's unlikely, but still possible that some of them could be
>     created during the test as well, so the patch only checks
>     errno.
> 
> 
> Thanks for fixing this, seems the msgget03 has this problem as well.
> https://github.com/linux-test-project/ltp/issues/842 <https://github.com/linux-test-project/ltp/issues/842>

Yes, it is the same, it can be easily reproduced:

$ ./msgget03
tst_test.c:1311: TINFO: Timeout per run is 0h 05m 00s
msgget03.c:50: TINFO: The maximum number of message queues (32000) reached
msgget03.c:29: TPASS: msgget(1627491660, 1536) : ENOSPC (28)

$ ipcmk -Q
Message queue id: 32768

$ ./msgget03
tst_test.c:1311: TINFO: Timeout per run is 0h 05m 00s
msgget03.c:46: TBROK: msgget failed unexpectedly: ENOSPC (28)


We can fix it similarly.

> 
> 
>     Signed-off-by: Alexey Kodanev <aleksei.kodanev@bell-sw.com <mailto:aleksei.kodanev@bell-sw.com>>
> 
>  Reviewed-by: Li Wang <liwang@redhat.com <mailto:liwang@redhat.com>>
> 
> -- 
> Regards,
> Li Wang