60 static void child_start(struct child_data *child, const char *program)  in child_start()  argument
70 	child->pid = fork();  in child_start()
71 	if (child->pid == -1)  in child_start()
75 	if (!child->pid) {  in child_start()
77 		 * In child, replace stdout with the pipe, errors to  in child_start()
123 		 * In parent, remember the child and close our copy of the  in child_start()
127 		child->stdout = pipefd[0];  in child_start()
128 		child->output = NULL;  in child_start()
129 		child->exited = false;  in child_start()
130 		child->output_seen = false;  in child_start()
133 		ev.data.ptr = child;  in child_start()
135 		ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, child->stdout, &ev);  in child_start()
138 					   child->name, strerror(errno), errno);  in child_start()
143 static bool child_output_read(struct child_data *child)  in child_output_read()  argument
149 	ret = read(child->stdout, read_data, sizeof(read_data));  in child_output_read()
155 			       child->name, strerror(errno),  in child_output_read()
161 	child->output_seen = true;  in child_output_read()
164 	if (child->output) {  in child_output_read()
165 		strncpy(work, child->output, sizeof(work) - 1);  in child_output_read()
167 		free(child->output);  in child_output_read()
168 		child->output = NULL;  in child_output_read()
179 			ksft_print_msg("%s: %s\n", child->name, work);  in child_output_read()
188 		ret = asprintf(&child->output, "%s", work);  in child_output_read()
196 static void child_output(struct child_data *child, uint32_t events,  in child_output()  argument
203 			read_more = child_output_read(child);  in child_output()
208 		close(child->stdout);  in child_output()
209 		child->stdout = -1;  in child_output()
213 	if (flush && child->output) {  in child_output()
214 		ksft_print_msg("%s: %s<EOF>\n", child->name, child->output);  in child_output()
215 		free(child->output);  in child_output()
216 		child->output = NULL;  in child_output()
220 static void child_tickle(struct child_data *child)  in child_tickle()  argument
222 	if (child->output_seen && !child->exited)  in child_tickle()
223 		kill(child->pid, SIGUSR2);  in child_tickle()
226 static void child_stop(struct child_data *child)  in child_stop()  argument
228 	if (!child->exited)  in child_stop()
229 		kill(child->pid, SIGTERM);  in child_stop()
232 static void child_cleanup(struct child_data *child)  in child_cleanup()  argument
238 	if (!child->exited) {  in child_cleanup()
240 			ret = waitpid(child->pid, &status, 0);  in child_cleanup()
246 					       child->pid, strerror(errno),  in child_cleanup()
252 		child->exit_status = WEXITSTATUS(status);  in child_cleanup()
255 	if (!child->output_seen) {  in child_cleanup()
256 		ksft_print_msg("%s no output seen\n", child->name);  in child_cleanup()
260 	if (child->exit_status != 0) {  in child_cleanup()
262 			       child->name, child->exit_status);  in child_cleanup()
266 	ksft_test_result(!fail, "%s\n", child->name);  in child_cleanup()
308 static void start_fpsimd(struct child_data *child, int cpu, int copy)  in start_fpsimd()  argument
312 	ret = asprintf(&child->name, "FPSIMD-%d-%d", cpu, copy);  in start_fpsimd()
316 	child_start(child, "./fpsimd-test");  in start_fpsimd()
318 	ksft_print_msg("Started %s\n", child->name);  in start_fpsimd()
321 static void start_sve(struct child_data *child, int vl, int cpu)  in start_sve()  argument
329 	ret = asprintf(&child->name, "SVE-VL-%d-%d", vl, cpu);  in start_sve()
333 	child_start(child, "./sve-test");  in start_sve()
335 	ksft_print_msg("Started %s\n", child->name);  in start_sve()
338 static void start_ssve(struct child_data *child, int vl, int cpu)  in start_ssve()  argument
342 	ret = asprintf(&child->name, "SSVE-VL-%d-%d", vl, cpu);  in start_ssve()
350 	child_start(child, "./ssve-test");  in start_ssve()
352 	ksft_print_msg("Started %s\n", child->name);  in start_ssve()
355 static void start_za(struct child_data *child, int vl, int cpu)  in start_za()  argument
363 	ret = asprintf(&child->name, "ZA-VL-%d-%d", vl, cpu);  in start_za()
367 	child_start(child, "./za-test");  in start_za()
369 	ksft_print_msg("Started %s\n", child->name);  in start_za()
372 static void start_zt(struct child_data *child, int cpu)  in start_zt()  argument
376 	ret = asprintf(&child->name, "ZT-%d", cpu);  in start_zt()
380 	child_start(child, "./zt-test");  in start_zt()
382 	ksft_print_msg("Started %s\n", child->name);  in start_zt()
505 		ksft_exit_fail_msg("Unable to allocate child data\n");  in main()
599 		 * If the child processes have not produced output they  in main()