[LTP] [PATCH v3] waitid10: Add .needs_tmpdir=1 to run test in temporary directory

[Hui Min Mina Chou]

When testing via NFS mount LTP folder on the board, with the NFS server
configured using 'anonuid' and 'anongid' options to set specific
uid/gid, waitid10 fails. This is due to a uid mismatch during core dump
file creation, leading to an aborted dump, resulting in the child
process receiving the signal CLD_KILLED instead of CLD_DUMPED.

  # ./waitid10
  tst_buffers.c:56: TINFO: Test is using guarded buffers
  tst_test.c:1732: TINFO: LTP version: 20240129
  tst_test.c:1616: TINFO: Timeout per run is 0h 05m 00s
  waitid10.c:64: TINFO: Raising RLIMIT_CORE rlim_cur=0 -> 0
  [  296.482665] mnt_uid= 1036, curr_uid= 0
  [  296.483041] Core dump to core aborted: cannot preserve file owner
  waitid10.c:36: TPASS: waitid(P_ALL, 0, infop, WEXITED) passed
  waitid10.c:37: TPASS: infop->si_pid == pidchild (149)
  waitid10.c:38: TPASS: infop->si_status == SIGFPE (8)
  waitid10.c:39: TPASS: infop->si_signo == SIGCHLD (17)
  waitid10.c:42: TFAIL: infop->si_code (2) != CLD_DUMPED (3)

Therefore, add .needs_tmpdir = 1 relocates the working directory to
temporary directory, preventing core file creation failures due to
NFS server settings.

Signed-off-by: Hui Min Mina Chou <minachou@andestech.com>
---
 testcases/kernel/syscalls/waitid/waitid10.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/testcases/kernel/syscalls/waitid/waitid10.c b/testcases/kernel/syscalls/waitid/waitid10.c
index e55e88c2325e..9100cc2d7a54 100644
--- a/testcases/kernel/syscalls/waitid/waitid10.c
+++ b/testcases/kernel/syscalls/waitid/waitid10.c
@@ -76,4 +76,5 @@ static struct tst_test test = {
 		{&infop, .size = sizeof(*infop)},
 		{},
 	},
+	.needs_tmpdir = 1,
 };
-- 
2.34.1