drhyme_ioctl_test.c Source

1	// SPDX-License-Identifier: GPL-2.0
2	#include <errno.h>
3	#include <fcntl.h>
4	#include <stdio.h>
5	#include <stdlib.h>
6	#include <string.h>
7	#include <sys/ioctl.h>
8	#include <unistd.h>
9
10	#include "drhyme_sensor_uapi.h"
11
12	static void die(const char *what)
13	{
14	fprintf(stderr, "%s: %s\n", what, strerror(errno));
15	exit(1);
16	}
17
18	int main(int argc, char **argv)
19	{
20	const char *path = argc > 1 ? argv[1] : "/dev/drhyme_sensor0";
21	struct drhyme_sensor_config config = { .config = 42 };
22	struct drhyme_sensor_status status;
23	int fd;
24
25	fd = open(path, O_RDONLY);
26	if (fd < 0)
27	die("open");
28
29	if (ioctl(fd, DRHYME_IOCTL_SET_CONFIG, &config) < 0)
30	die("DRHYME_IOCTL_SET_CONFIG");
31
32	memset(&status, 0, sizeof(status));
33	if (ioctl(fd, DRHYME_IOCTL_GET_STATUS, &status) < 0)
34	die("DRHYME_IOCTL_GET_STATUS");
35
36	printf("abi=%u enabled=%u config=%u read_count=%llu\n",
37	status.abi_version, status.enabled, status.config,
38	(unsigned long long)status.read_count);
39
40	close(fd);
41	return 0;
42	}