47 	pid_t pid;  in main()  local
91 	pid = fork();  in main()
92 	assert(pid != -1);  in main()
93 	if (pid == 0) {  in main()
99 		assert(waitpid(pid, &status, 0) == pid);  in main()
106 		pid = fork();  in main()
107 		assert(pid != -1);  in main()
108 		if (pid == 0) {  in main()
119 			assert(waitpid(pid, &status, 0) == pid);  in main()
133 	pid = fork();  in main()
134 	assert(pid != -1);  in main()
135 	if (pid == 0) {  in main()
141 		assert(waitpid(pid, &status, 0) == pid);  in main()
148 		pid = fork();  in main()
149 		assert(pid != -1);  in main()
150 		if (pid == 0) {  in main()
161 			assert(waitpid(pid, &status, 0) == pid);  in main()