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
144
145
146
147
|
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
#include <string.h>
#include "cputemp2maxfreq.h"
#include "debug.h"
#include "sysfs.h"
#include "cputemp.h"
extern struct s_config config;
// Check if the sensor matches our search criteria and validate the readout
void cputemp_match_and_validate(char *name_file,char *input_file,char *sensor_name,struct s_sensor *sensor)
{
int datalen;
long int testdata;
char buf[255];
// Read the name to see if it matches what we're looking for
datalen=sysfs_read_str(name_file,buf,sizeof(buf));
if (datalen<0)
{
DEBUG2_CPUTEMP("Failed to read name\n");
return;
}
DEBUG1_CPUTEMP("Name is: %s\n",buf);
if (strncasecmp(buf,sensor_name,255)==0)
{
DEBUG2_CPUTEMP("Name machtes our search criteria\n");
DEBUG1_CPUTEMP("Input filename: %s\n",input_file);
// Validate the sensor by reading it
testdata=sysfs_read_long_int(input_file);
DEBUG2_CPUTEMP("Input value: %ld\n",testdata);
if ((testdata>=VALID_TEMP_MIN) && (testdata<=VALID_TEMP_MAX))
{
DEBUG1_CPUTEMP("Input data is valid, marking sensor as valid\n");
sensor->valid=1;
strncpy(sensor->name,buf,sizeof(buf));
strncpy(sensor->filename,input_file,sizeof(sensor->filename));
} else {
DEBUG1_CPUTEMP("Input data is invalid, ignoring sensor\n");
}
}
}
// Read a single hwmon directory and search for the requested sensor name
void cputemp_read_hwmon(char *hwmon,char *sensor_name,struct s_sensor *sensor)
{
DIR *hwmon_dir;
struct dirent *hwmon_dirent;
int count;
char name_file[255];
char input_file[255];
int offset;
DEBUG1_CPUTEMP("Searching for sensors in %s\n",hwmon);
hwmon_dir=opendir(hwmon);
if (hwmon_dir==NULL)
{
DEBUG1_CPUTEMP("Failed to open hwmon dir\n");
return;
}
hwmon_dirent=readdir(hwmon_dir);
while((hwmon_dirent!=NULL) && (sensor->valid==0))
{
DEBUG3_CPUTEMP("%s\n",hwmon_dirent->d_name);
// We are searching for files named "temp<number>_label"
if (strncmp(hwmon_dirent->d_name,"temp",4)==0)
{
DEBUG3_CPUTEMP("Found temp entry: %s\n",hwmon_dirent->d_name);
offset=0;
for(count=5;count<7;count++)
{
if (hwmon_dirent->d_name[count]=='_')
{
DEBUG3_CPUTEMP("Underscore at %d\n",count);
offset=count+1;
break;
}
}
if (strncmp(hwmon_dirent->d_name+offset,"label",5)==0)
{
DEBUG2_CPUTEMP("Found label %s\n",hwmon_dirent->d_name);
sprintf(name_file,"%s/%s",hwmon,hwmon_dirent->d_name);
sprintf(input_file,"%s/%s",hwmon,hwmon_dirent->d_name);
offset=strlen(input_file)-5;
strncpy(input_file+offset,"input",5);
cputemp_match_and_validate(name_file,input_file,sensor_name,sensor);
}
}
hwmon_dirent=readdir(hwmon_dir);
}
closedir(hwmon_dir);
// Some drivers do note have labels, so check the driver too if we didn't find anything so far
if (sensor->valid==0)
{
DEBUG2_CPUTEMP("Checking driver name\n");
sprintf(name_file,"%s/name",hwmon);
sprintf(input_file,"%s/temp1_input",hwmon);
cputemp_match_and_validate(name_file,input_file,sensor_name,sensor);
}
}
// Find all entries under /sys/class/hwmon and check them with
// cputemp_read_hwmon
void cputemp_find_sensor(char *sensor_name,struct s_sensor *sensor)
{
DIR *hwmon_dir;
struct dirent *hwmon_dirent;
char subdir[255];
DEBUG1_CPUTEMP("Searching for sensor %s\n",sensor_name);
// Mark sensor data as invalid, it will be set valid if we find something
sensor->valid=0;
hwmon_dir=opendir("/sys/class/hwmon");
if (hwmon_dir==NULL)
{
DEBUG1_CPUTEMP("Failed to open /sys/class/hwmon, is sysfs mounted?\n");
return;
}
hwmon_dirent=readdir(hwmon_dir);
while((hwmon_dirent!=NULL) && (sensor->valid==0))
{
DEBUG3_CPUTEMP("Found file: %s\n",hwmon_dirent->d_name);
// If the name starts with hwmon try to read it
// Note that /sys/class/hwmon actually contains symlinks but we treat them like directories
if (strncmp(hwmon_dirent->d_name,"hwmon",5)==0)
{
sprintf(subdir,"/sys/class/hwmon/%s",hwmon_dirent->d_name);
DEBUG2_CPUTEMP("Found hwmon entry: %s\n",subdir);
cputemp_read_hwmon(subdir,sensor_name,sensor);
}
hwmon_dirent=readdir(hwmon_dir);
}
closedir(hwmon_dir);
}
|
