1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/* $OpenBSD: sensors.c,v 1.1 2006/05/26 00:33:16 henning Exp $ */
/*
* Copyright (c) 2006 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/sensors.h>
#include <sys/sysctl.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ntpd.h"
#define SENSORS_MAX 255
void sensor_add(struct ntpd_conf *, struct sensor *);
void
sensor_init(struct ntpd_conf *conf)
{
TAILQ_INIT(&conf->ntp_sensors);
}
void
sensor_scan(struct ntpd_conf *conf)
{
struct sensor sensor;
int i;
int mib[3];
size_t len;
mib[0] = CTL_HW;
mib[1] = HW_SENSORS;
for (i = 0; i < SENSORS_MAX; i++) {
mib[2] = i;
len = sizeof(sensor);
if (sysctl(mib, 3, &sensor, &len, NULL, 0) == -1) {
if (errno != ENOENT)
log_warn("sensor_scan sysctl");
break;
}
if (sensor.type == SENSOR_TIMEDELTA)
sensor_add(conf, &sensor);
}
}
void
sensor_add(struct ntpd_conf *conf, struct sensor *sensor)
{
struct ntp_sensor *s;
/* check wether it is already there */
TAILQ_FOREACH(s, &conf->ntp_sensors, entry)
if (!strcmp(s->device, sensor->device))
return;
if ((s = calloc(1, sizeof(*s))) == NULL)
fatal("sensor_add calloc");
s->next = time(NULL);
if ((s->device = strdup(sensor->device)) == NULL)
fatal("sensor_add strdup");
s->sensorid = sensor->num;
TAILQ_INSERT_TAIL(&conf->ntp_sensors, s, entry);
log_debug("sensor %s added", s->device);
}
void
sensor_remove(struct ntpd_conf *conf, struct ntp_sensor *s)
{
TAILQ_REMOVE(&conf->ntp_sensors, s, entry);
free(s->device);
free(s);
}
int
sensor_query(struct ntp_sensor *s)
{
struct sensor sensor;
int mib[3];
size_t len;
s->next = time(NULL) + SENSOR_QUERY_INTERVAL;
if (s->update.rcvd < time(NULL) - SENSOR_DATA_MAXAGE)
s->update.good = 0;
mib[0] = CTL_HW;
mib[1] = HW_SENSORS;
mib[2] = s->sensorid;
len = sizeof(sensor);
if (sysctl(mib, 3, &sensor, &len, NULL, 0) == -1) {
log_warn("sensor_query sysctl");
return (0);
}
if (sensor.flags & SENSOR_FINVALID ||
sensor.status != SENSOR_S_OK)
return (0);
if (sensor.type != SENSOR_TIMEDELTA ||
strcmp(sensor.device, s->device))
return (-1); /* causes sensor removal */
if (sensor.tv.tv_sec == s->update.rcvd) /* already seen */
return (0);
s->update.offset = 0 - (float)sensor.value / 1000000000.0;
s->update.status.stratum = 0; /* increased when sent out */
s->update.status.rootdelay = 0;
s->update.status.rootdispersion = 0;
s->update.status.reftime = sensor.tv.tv_sec;
/* XXX 4 char, 'DCF ', 'GPS ', 'PPS ' and the like */
s->update.status.refid = 0;
s->update.rcvd = sensor.tv.tv_sec;
s->update.good = 1;
log_debug("sensor %s: offset %f", s->device, s->update.offset);
return (0);
}
|
