// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org> */#include <sys/types.h>#include <sys/stat.h>#include <pthread.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <errno.h>#include <fcntl.h>#include <stdio.h> #include "timerlat.h" static void timerlat_usage(int err){	int i; 	static const char * const msg[] = {		"",		"timerlat version " VERSION,		"",		"  usage: [rtla] timerlat [MODE] ...",		"",		"  modes:",		"     top   - prints the summary from timerlat tracer",		"     hist  - prints a histogram of timer latencies",		"",		"if no MODE is given, the top mode is called, passing the arguments",		NULL,	}; 	for (i = 0; msg[i]; i++)		fprintf(stderr, "%s\n", msg[i]);	exit(err);} int timerlat_main(int argc, char *argv[]){	if (argc == 0)		goto usage; 	/*	 * if timerlat was called without any argument, run the	 * default cmdline.	 */	if (argc == 1) {		timerlat_top_main(argc, argv);		exit(0);	} 	if ((strcmp(argv[1], "-h") == 0) || (strcmp(argv[1], "--help") == 0)) {		timerlat_usage(0);	} else if (strncmp(argv[1], "-", 1) == 0) {		/* the user skipped the tool, call the default one */		timerlat_top_main(argc, argv);		exit(0);	} else if (strcmp(argv[1], "top") == 0) {		timerlat_top_main(argc-1, &argv[1]);		exit(0);	} else if (strcmp(argv[1], "hist") == 0) {		timerlat_hist_main(argc-1, &argv[1]);		exit(0);	} usage:	timerlat_usage(1);	exit(1);}