[LTP] [PATCH V2 09/11] syscalls/waitpid: adapt reap_children() to test stopped children

[Stanislav Kholmanskikh]

If the pid returned by waitpid() is the pid of a stopped child,
we send it the SIGCONT signal.

Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
---
This is a new patch in the series, extracted from V1 of waitpid13.c

 testcases/kernel/syscalls/waitpid/waitpid_common.h |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/testcases/kernel/syscalls/waitpid/waitpid_common.h b/testcases/kernel/syscalls/waitpid/waitpid_common.h
index f724a17..7b67a06 100644
--- a/testcases/kernel/syscalls/waitpid/waitpid_common.h
+++ b/testcases/kernel/syscalls/waitpid/waitpid_common.h
@@ -131,6 +131,23 @@ static int reap_children(pid_t wp_pid, int wp_opts, pid_t *children, int len)
 			return -1;
 		}
 
+		if (WIFSTOPPED(status)) {
+			if (WSTOPSIG(status) != SIGSTOP) {
+				tst_res(TFAIL,
+					"Pid %d: expected SIGSTOP, got %d",
+					pid, WSTOPSIG(status));
+				return -1;
+			}
+
+			if (kill(pid, SIGCONT) < 0) {
+				tst_res(TFAIL | TERRNO,
+					"kill(%d, SIGCONT) failed", pid);
+				return -1;
+			}
+
+			continue;
+		}
+
 		for (i = 0; i < len; i++) {
 			if (pid == children[i]) {
 				children[i] = 0;
-- 
1.7.1