-/* $Id: plugin_i2c_sensors.c,v 1.1 2004/01/10 17:36:56 reinelt Exp $
+/* $Id: plugin_i2c_sensors.c,v 1.2 2004/01/27 05:06:10 reinelt Exp $
*
* I2C sensors plugin
*
*
*
* $Log: plugin_i2c_sensors.c,v $
+ * Revision 1.2 2004/01/27 05:06:10 reinelt
+ * i2c update from Xavier
+ *
* Revision 1.1 2004/01/10 17:36:56 reinelt
*
* I2C Sensors plugin from Xavier added
* -- 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".
+ * an error message with "lcd4linux -Fvvv".
*
* 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 !
+ * i2c_sensors-path '/sys/bus/i2c/devices/0-6000/'
+ * (replace 0-6000 with the appropriate dir)
*
*/
-
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "debug.h"
#include "plugin.h"
#include "cfg.h"
+#include "hash.h"
static char *path=NULL;
+static HASH I2Csensors = { 0, };
-static void my_i2c_sensors (RESULT *result, RESULT *arg)
+static int parse_i2c_sensors(RESULT *arg)
{
- int fd=-2;
double value;
+ char val[32];
char buffer[32];
char *key=R2S(arg);
- char *file;
+ char file[64];
+ FILE *stream;
// 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);
+ strcpy(file, path);
+ strcat(file, key);
- if (!buffer) {
- SetResult(&result, R_STRING, "??");
- return;
+ // read of file to buffer
+ stream=fopen(file, "r");
+ if (stream==NULL) {
+ error ("fopen(%s) failed",file);
+ return -1;
}
+ fgets (buffer, sizeof(buffer), stream);
+ fclose (stream);
- // now the formating stuff, depending on the file wanted
+ if (!buffer) {
+ error ("%s empty ?!",file);
+ return -1;
+ }
+
+ // now the formating stuff, depending on the file :
+ // Some values must be divided by 1000, the others
+ // are parsed directly (we just remove the \n).
if (!strncmp(key, "temp_", 5) ||
!strncmp(key, "curr_", 5) ||
!strncmp(key, "in_", 3) ||
!strncmp(key, "vid", 3)) {
value = strtod(buffer, NULL);
+ // FIXME: any way to do this without converting to double ?
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;
- }
-
+ sprintf(val, "%f", value);
+
} else {
- SetResult(&result, R_STRING, &buffer);
- return;
+ sprintf(val, "%s", buffer);
+ // we supress this nasty \n at the end
+ val[strlen(val)-1]='\0';
}
- // fallback is there's a problem
- SetResult(&result, R_STRING, "??");
-}
+ hash_set (&I2Csensors, key, val);
+ return 0;
+}
+
+void my_i2c_sensors (RESULT *result, RESULT *arg)
+{
+ int age;
+ char *val;
+ char *key=R2S(arg);
+
+ age=hash_age(&I2Csensors, key, &val);
+ // refresh every 100msec
+ if (age<0 || age>100)
+ {
+ parse_i2c_sensors(arg);
+ val=hash_get(&I2Csensors, key);
+ }
+ if (val) {
+ SetResult(&result, R_STRING, val);
+ } else {
+ SetResult(&result, R_STRING, "??");
+ }
+}
void my_i2c_sensors_path(void)
{
struct dirent *dir;
struct dirent *file;
- char *base="/sys/bus/i2c/devices/";
+ const char *base="/sys/bus/i2c/devices/";
char dname[64];
DIR *fd1;
DIR *fd2;
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 ;)
+ path = realloc(path, strlen(dname)+1);
+ strcpy(path, dname);
done=1;
break;
}
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);
+ char *path_cfg=cfg_get(NULL, "i2c_sensors-path", "");
+
+ if (strncmp(path_cfg, "/", 1)) {
+ debug("No path to i2c sensors found in the conf, calling my_i2c_sensors_path()");
+ my_i2c_sensors_path();
+ if (!path) {
+ error("[i2c_sensors] No i2c sensors found via the i2c interface !");
+ error("[i2c_sensors] Try to specify the path to the sensors !");
+ } else {
+ debug("Your i2c sensors are probably in %s", path);
+ debug("if i2c_sensors doesn't work, try to specify the path in your conf");
+ }
+
+ } else {
+ if (path_cfg[strlen(path_cfg)-1] != '/') {
+ // the headless user forgot the trailing slash :/
+ debug("adding a trailing slash at the end of the path");
+ path_cfg = realloc(path_cfg, strlen(path_cfg)+2);
+ strcat(path_cfg, "/");
+ }
+ debug("Path to i2c sensors from the conf : %s", path_cfg);
+ debug("if i2c_sensors doesn't work, double check this value !");
+ path = realloc(path, strlen(path_cfg)+1);
+ strcpy(path, path_cfg);
+ free(path_cfg);
+ }
- printf("%s\n", path);
+ // we activate the function only if there's a possibly path found
+ if (!path) {
+ free(path);
+ } else {
+ AddFunction ("i2c_sensors", 1, my_i2c_sensors);
+ }
+
return 0;
}
-
projects / lcd4linux.git / commitdiff