// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org> */ #include <getopt.h>#include <stdlib.h>#include <string.h>#include <stdio.h> #include "osnoise.h"#include "timerlat.h" /* * rtla_usage - print rtla usage */static void rtla_usage(int err){	int i; 	static const char *msg[] = {		"",		"rtla version " VERSION,		"",		"  usage: rtla COMMAND ...",		"",		"  commands:",		"     osnoise  - gives information about the operating system noise (osnoise)",		"     hwnoise  - gives information about hardware-related noise",		"     timerlat - measures the timer irq and thread latency",		"",		NULL,	}; 	for (i = 0; msg[i]; i++)		fprintf(stderr, "%s\n", msg[i]);	exit(err);} /* * run_command - try to run a rtla tool command * * It returns 0 if it fails. The tool's main will generally not * return as they should call exit(). */int run_command(int argc, char **argv, int start_position){	if (strcmp(argv[start_position], "osnoise") == 0) {		osnoise_main(argc-start_position, &argv[start_position]);		goto ran;	} else if (strcmp(argv[start_position], "hwnoise") == 0) {		hwnoise_main(argc-start_position, &argv[start_position]);		goto ran;	} else if (strcmp(argv[start_position], "timerlat") == 0) {		timerlat_main(argc-start_position, &argv[start_position]);		goto ran;	} 	return 0;ran:	return 1;} int main(int argc, char *argv[]){	int retval; 	/* is it an alias? */	retval = run_command(argc, argv, 0);	if (retval)		exit(0); 	if (argc < 2)		goto usage; 	if (strcmp(argv[1], "-h") == 0) {		rtla_usage(0);	} else if (strcmp(argv[1], "--help") == 0) {		rtla_usage(0);	} 	retval = run_command(argc, argv, 1);	if (retval)		exit(0); usage:	rtla_usage(1);	exit(1);}