[LTP] [PATCH v3 2/2] shmem_2nstest: fix a bug of hang

[Peng Haitao <penght@cn.fujitsu.com>]

commit d2e9f84 replace fprintf() with snprintf() in tst_print(), but this will
cause container_test.sh hang in case shmem_2nstest.

If compile tst_res.c without -O[level], the case will not hang.

When I test the following cases:
# ./shmem_2nstest none
shmem_2nstest    0  TINFO  :  Shared Memory namespace test : none
shmem_2nstest    0  TINFO  :  Cont1: Able to create shared mem segment
shmem_2nstest    1  TPASS  :  Plain cloned process able to access shmem segment created
# ./shmem_2nstest unshare
shmem_2nstest    0  TINFO  :  Shared Memory namespace test : unshare
shmem_2nstest    0  TINFO  :  Cont1: Able to create shared mem segment
shmem_2nstest    0  TINFO  :  Cont2: Able to allocate shmem seg with the same key
shmem_2nstest    1  TPASS  :  unshare : In namespace2 unable to access the shmem seg created in Namespace1
# ./shmem_2nstest clone
shmem_2nstest    0  TINFO  :  Shared Memory namespace test : clone

this will hang up.

So I think tst_resm("Cont1") will cause hang.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
---
 .../kernel/containers/sysvipc/shmem_2nstest.c      |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/testcases/kernel/containers/sysvipc/shmem_2nstest.c b/testcases/kernel/containers/sysvipc/shmem_2nstest.c
index 7a468ad..28e91ff 100644
--- a/testcases/kernel/containers/sysvipc/shmem_2nstest.c
+++ b/testcases/kernel/containers/sysvipc/shmem_2nstest.c
@@ -69,8 +69,8 @@ int check_shmem1(void *vtest)
 	if (id1 == -1)
 		tst_brkm(TFAIL|TERRNO, NULL, "shmget failed");
 
-	tst_resm(TINFO, "Cont1: Able to create shared mem segment");
 	write(p1[1], "done", 5);
+	tst_resm(TINFO, "Cont1: Able to create shared mem segment");
 	tst_exit();
 }
 
-- 
1.7.1

-- 
Best Regards,
Peng


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