6  * PID namespace.
45 	pid_t pid = -1;  in call_clone3_set_tid()  local
54 	pid = sys_clone3(&args, sizeof(args));  in call_clone3_set_tid()
55 	if (pid < 0) {  in call_clone3_set_tid()
61 	if (pid == 0) {  in call_clone3_set_tid()
66 		ksft_print_msg("I am the child, my PID is %d (expected %d)\n",  in call_clone3_set_tid()
96 	if (expected_pid == 0 || expected_pid == pid) {  in call_clone3_set_tid()
97 		ksft_print_msg("I am the parent (%d). My child's pid is %d\n",  in call_clone3_set_tid()
98 			       getpid(), pid);  in call_clone3_set_tid()
101 			"Expected child pid %d does not match actual pid %d\n",  in call_clone3_set_tid()
102 			expected_pid, pid);  in call_clone3_set_tid()
106 	if (waitpid(pid, &status, 0) < 0) {  in call_clone3_set_tid()
151 	pid_t pid, ns1, ns2, ns3, ns_pid;  in main()  local
187 	 * nested PID namespace.  in main()
208 	 * nested PID namespace.  in main()
214 	/* Try with an invalid PID */  in main()
227 	/* Try it in a new PID namespace */  in main()
234 	/* Try with a valid PID (1) this should return -EEXIST. */  in main()
237 		test_clone3_set_tid("duplicate PID 1",  in main()
242 	/* Try it in a new PID namespace */  in main()
244 		test_clone3_set_tid("duplicate PID 1",  in main()
269 	/* Find the current active PID */  in main()
270 	pid = fork();  in main()
271 	if (pid == 0) {  in main()
272 		ksft_print_msg("Child has PID %d\n", getpid());  in main()
275 	if (waitpid(pid, &status, 0) < 0)  in main()
276 		ksft_exit_fail_msg("Waiting for child %d failed", pid);  in main()
278 	/* After the child has finished, its PID should be free. */  in main()
279 	set_tid[0] = pid;  in main()
283 	/* This should fail as there is no PID 1 in that namespace */  in main()
288 	 * Creating a process with PID 1 in the newly created most nested  in main()
289 	 * PID namespace and PID 'pid' in the parent PID namespace. This  in main()
293 	set_tid[1] = pid;  in main()
294 	test_clone3_set_tid("create PID 1 in new NS",  in main()
295 			    set_tid, 2, CLONE_NEWPID, 0, pid, 0);  in main()
297 	ksft_print_msg("unshare PID namespace\n");  in main()
302 	set_tid[0] = pid;  in main()
304 	/* This should fail as there is no PID 1 in that namespace */  in main()
305 	test_clone3_set_tid("duplicate PID 1",  in main()
308 	/* Let's create a PID 1 */  in main()
312 		 * This and the next test cases check that all pid-s are  in main()
321 		set_tid[1] = pid;  in main()
325 		ksft_print_msg("Child in PID namespace has PID %d\n", getpid());  in main()
327 		test_clone3_set_tid("create PID 2 in child NS",  in main()
332 		set_tid[2] = pid;  in main()
333 		/* This should fail as there is invalid PID at level '1'. */  in main()
339 		set_tid[2] = pid;  in main()
341 		 * This should fail as there are not enough active PID  in main()
343 		 * PID namespace. Not yet nested.  in main()
345 		test_clone3_set_tid("fail due to too few active PID NSs",  in main()
350 		 * something like 'NSpid:	pid	42	1'.  in main()
352 		test_clone3_set_tid("verify that we have 3 PID NSs",  in main()
365 	snprintf(proc_path, sizeof(proc_path), "/proc/%d/status", pid);  in main()
408 	ksft_print_msg("Expecting PIDs %d, 42, 1\n", pid);  in main()
410 	ksft_test_result(ns3 == pid && ns2 == 42 && ns1 == 1,  in main()