Updated `README.md` with instructions for building/using the kernel module.

[xeon-phi-kernel-module] / trace_capture / docapture.c

/*
 * Copyright 2010-2017 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * Disclaimer: The codes contained in these modules may be specific to
 * the Intel Software Development Platform codenamed Knights Ferry,
 * and the Intel product codenamed Knights Corner, and are not backward
 * compatible with other Intel products. Additionally, Intel will NOT
 * support the codes or instruction set in future products.
 *
 * Intel offers no warranty of any kind regarding the code. This code is
 * licensed on an "AS IS" basis and Intel is not obligated to provide
 * any support, assistance, installation, training, or other services
 * of any kind. Intel is also not obligated to provide any updates,
 * enhancements or extensions. Intel specifically disclaims any warranty
 * of merchantability, non-infringement, fitness for any particular
 * purpose, and any other warranty.
 *
 * Further, Intel disclaims all liability of any kind, including but
 * not limited to liability for infringement of any proprietary rights,
 * relating to the use of the code, even if Intel is notified of the
 * possibility of such liability. Except as expressly stated in an Intel
 * license agreement provided with this code and agreed upon with Intel,
 * no license, express or implied, by estoppel or otherwise, to any
 * intellectual property rights is granted herein.
 */

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>		/* open */
#include <unistd.h>		/* exit */
#include <sys/ioctl.h>		/* ioctl */

#include "trace_capture.h"

void
ioctl_start_capture(int file_desc, long trigger)
{
	ioctl(file_desc, MICTC_START_CAPTURE, trigger);
}

int
main (int argc, char *argv[])
{
	int file_desc;
	long trigger = 1;

	if ((file_desc = open(MICTC_FILE_NAME, 0)) < 0) {
		printf("Can't open device file: %s\n", MICTC_FILE_NAME);
		exit(-1);
	}

	if (argc == 2) {
		trigger = atoi(argv[1]);
		printf("Trigger %ld\n", trigger);
	}

	ioctl_start_capture(file_desc, trigger);
	printf("Done.\n");

	close(file_desc);
}