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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/* $Id: plugin_i2c_sensors.c,v 1.1 2004/01/10 17:36:56 reinelt Exp $
*
* I2C sensors plugin
*
* Copyright 2003,2004 Xavier Vello <xavier66@free.fr>
*
* This file is part of LCD4Linux.
*
* LCD4Linux is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LCD4Linux 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: plugin_i2c_sensors.c,v $
* Revision 1.1 2004/01/10 17:36:56 reinelt
*
* I2C Sensors plugin from Xavier added
*
*
*/
/*
* exported functions:
*
* int plugin_init_i2c_sensors (void)
* adds function i2c_sensors() to retrieve informations from
* the i2c sensors via the sysfs interface of 2.6.x kernels
*
* -- WARNING --
* This plugin is only for kernel series 2.5/2.6 and higher !
* It uses the new sysfs pseudo-filesystem that you can mount with:
* mount -t sysfs none /sys
*
* -- WARNING #2 --
* This plugin should detect where your sensors are at startup.
* If you can't get any token to work, ensure you don't get
* an error message with "lcd4linux -F".
*
* If so, try to force the path to your sensors in the conf like this :
* i2c_sensors.path /sys/bus/i2c/devices/0-6000/
*
* - replace 0-6000 with the appropriate dir
* - DON'T forget the trailing slash or it won't work !
*
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include "debug.h"
#include "plugin.h"
#include "cfg.h"
static char *path=NULL;
static void my_i2c_sensors (RESULT *result, RESULT *arg)
{
int fd=-2;
double value;
char buffer[32];
char *key=R2S(arg);
char *file;
// construct absolute path to the file to read
// Fixme: MR: free the path again??
file = strdup(path);
file = realloc(file, strlen(path)+strlen(key)+1);
file = strcat(file, key);
// read of file to buffer
fd = open(file, O_RDONLY);
read (fd, &buffer, 31);
close(fd);
if (!buffer) {
SetResult(&result, R_STRING, "??");
return;
}
// now the formating stuff, depending on the file wanted
if (!strncmp(key, "temp_", 5) ||
!strncmp(key, "curr_", 5) ||
!strncmp(key, "in_", 3) ||
!strncmp(key, "vid", 3)) {
value = strtod(buffer, NULL);
value /= 1000.0;
if (value) {
SetResult(&result, R_NUMBER, &value);
return;
}
} else if (!strncmp(key, "fan_", 4) ||
!strncmp(key, "pwn_", 4) ||
!strncmp(key, "vrm", 5)) {
value = strtod(buffer, NULL);
if (value) {
SetResult(&result, R_NUMBER, &buffer);
return;
}
} else {
SetResult(&result, R_STRING, &buffer);
return;
}
// fallback is there's a problem
SetResult(&result, R_STRING, "??");
}
void my_i2c_sensors_path(void)
{
struct dirent *dir;
struct dirent *file;
char *base="/sys/bus/i2c/devices/";
char dname[64];
DIR *fd1;
DIR *fd2;
int done;
fd1 = opendir(base);
while((dir = readdir(fd1))) {
// Skip '.' and '..'
if (strcmp(dir->d_name, "." )==0 ||
strcmp(dir->d_name, "..")==0) {
continue;
}
// dname is the absolute path
strcpy(dname, base);
strcat(dname, dir->d_name);
strcat(dname, "/");
fd2 = opendir(dname);
done = 0;
while((file = readdir(fd2))) {
if (!strcmp(file->d_name, "temp_input1")) { // FIXME : do all sensors have a temp_input1 ?
path = realloc(path, strlen(dname));
strcpy(path, dname); // we've got it ;)
done=1;
break;
}
}
closedir(fd2);
if (done) break;
}
closedir(fd1);
// fallback is path undefined
if (*path != '/') {
error("[i2c_sensors] No i2c sensors found via the i2c interface !");
error("[i2c_sensors] Try to specify the path to the sensors !");
}
}
int plugin_init_i2c_sensors (void)
{
// char *path_cfg=cfg_get(NULL, "i", "");
// printf("%s\n", path_cfg);
// if (strncmp(path_cfg, "/", 1)) {
// printf("%s\n", "Calling my_i2c_sensors_path()");
my_i2c_sensors_path();
// } else {
// path = realloc(path, strlen(path_cfg)+1);
// strcpy(path, path_cfg);
// }
AddFunction ("i2c_sensors", 1, my_i2c_sensors);
printf("%s\n", path);
return 0;
}
|
