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// 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);
}
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