procinfo.cpp

这是linux下读取pc主板温度传感器的源代码

/***************************************************************************
                          procinfo.c  -  description
                             -------------------
    begin                : Wed Jan 9 2002
    copyright            : (C) 2002 by Miguel Novas
    email                : [e-mail]
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program 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 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "procinfo.h"

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>


bool existsFile(const char *file)
{
struct stat buf;

 return (stat((const char *)file,&buf)==0);
}


int read_file(const char *name, char *buf, int max)
{
    int fd = open(name, O_RDONLY);
    if(fd >= 0) {
       int r = read(fd, buf, max);
       close(fd);
       return r;
    }
    return -1;
}


// ***** Dell i8k sensors info *****
//
//    $ cat /proc/i8k
//    1.0 A17 2J59L02 52 2 1 8040 6420 1 2
//
//The fields read from /proc/18k are:
//
//    1.0 A17 2J59L02 52 2 1 8040 6420 1 2
//    |   |   |       |  | | |    |    | |
//    |   |   |       |  | | |    |    | +------- 10. buttons status
//    |   |   |       |  | | |    |    +--------- 9.  ac status
//    |   |   |       |  | | |    +-------------- 8.  right fan rpm
//    |   |   |       |  | | +------------------- 7.  left fan rpm
//    |   |   |       |  | +--------------------- 6.  right fan status
//    |   |   |       |  +----------------------- 5.  left fan status
//    |   |   |       +-------------------------- 4.  CPU temperature (Celsius)
//    |   |   +---------------------------------- 3.  serial number
//    |   +-------------------------------------- 2.  BIOS version
//    +------------------------------------------ 1.  /proc/i8k format version

int getI8KInfo(double *cpuTemp,  double *leftFan, double *rightFan)
{
double version;
char buf[256];

 if(read_file("/proc/i8k", buf, sizeof(buf)) <= 0) return -1;
 if(sscanf(buf, "%lf %*s %*s %lf %*d %*d %lf %lf", &version, cpuTemp,leftFan,rightFan)!=4) return -2;
 if(version!=1.0) return -3;
 return 0;
}


// *************  Acpi temperature ************
// cat /proc/acpi/thermal_zone/THRM/temperature
// temperature: