1 files changed, 36 insertions, 0 deletions
diff --git a/test/zdtm/static/child_subreaper.c b/test/zdtm/static/child_subreaper.c
new file mode 100644
index 000000000..267795249
--- /dev/null
+++ b/test/zdtm/static/child_subreaper.c
@@ -0,0 +1,36 @@
+#include <stdlib.h>
+#include <sys/prctl.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check that child subreaper attribute is restored";
+const char *test_author	= "Michał Cłapiński <mclapinski@google.com>";
+
+int main(int argc, char **argv)
+{
+	test_init(argc, argv);
+
+	int cs_before = 1;
+	int ret = prctl(PR_SET_CHILD_SUBREAPER, cs_before, 0, 0, 0);
+	if (ret) {
+		pr_perror("Can't set child subreaper attribute, err = %d", ret);
+		exit(1);
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	int cs_after;
+	ret = prctl(PR_GET_CHILD_SUBREAPER, (unsigned long)&cs_after, 0, 0, 0);
+	if (ret) {
+		pr_perror("Can't get child subreaper attribute, err = %d", ret);
+		exit(1);
+	}
+
+	if (cs_before != cs_after)
+		fail("%d != %d\n", cs_before, cs_after);
+	else
+		pass();
+
+	return 0;
+}