43 	pid_t pid;  in main()  local
51 	pid = fork();  in main()
52 	assert(pid >= 0);  in main()
53 	if (!pid) {  in main()
61 	assert(wait4(pid, &s, WNOHANG | __WALL, NULL) == 0);  in main()
62 	assert(waitid(P_PID, pid, &info, WNOHANG | WEXITED) == 0);  in main()
66 	assert(wait4(pid, &s, 0, &rusage) == pid);  in main()
69 	pid = fork();  in main()
70 	assert(pid >= 0);  in main()
71 	if (!pid) {  in main()
75 	assert(wait4(pid, &s, __WALL, NULL) == pid);  in main()
78 	pid = fork();  in main()
79 	assert(pid >= 0);  in main()
80 	if (!pid) {  in main()
84 	assert(wait4(pid, &s, WUNTRACED, NULL) == pid);  in main()
87 	assert(kill(pid, SIGCONT) == 0);  in main()
88 	assert(waitid(P_PID, pid, &info, WEXITED | WSTOPPED) == 0);  in main()