Zabbix

/*

** Zabbix

** Copyright (C) 2001-2025 Zabbix SIA

**

** 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.

**

** This program 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

#include "common.h"

#include "sysinfo.h"

#include "zbxregexp.h"

​

#ifdef KERNEL_2_4

#define DEVICE_DIR  "/proc/sys/dev/sensors"

#else

#define DEVICE_DIR  "/sys/class/hwmon"

static const char   *locations[] = {"", "/device", NULL};

#endif

​

#define ATTR_MAX    128

​

static void count_sensor(int do_task, const char *filename, double *aggr, int *cnt)

{

    FILE    *f;

    char    line[MAX_STRING_LEN];

    double  value;

​

    if (NULL == (f = fopen(filename, "r")))

        return;

​

    if (NULL == fgets(line, sizeof(line), f))

    {

        zbx_fclose(f);

        return;

    }

​

    zbx_fclose(f);

​

#ifdef KERNEL_2_4

    if (1 == sscanf(line, "%*f\t%*f\t%lf\n", &value))

    {

#else

    if (1 == sscanf(line, "%lf", &value))

    {

        if (NULL == strstr(filename, "fan"))

            value = value / 1000;

#endif

        (*cnt)++;

​

        switch (do_task)

        {

            case ZBX_DO_ONE:

                *aggr = value;

                break;

            case ZBX_DO_AVG:

                *aggr += value;

                break;

            case ZBX_DO_MAX:

                *aggr = (1 == *cnt ? value : MAX(*aggr, value));

                break;

            case ZBX_DO_MIN:

                *aggr = (1 == *cnt ? value : MIN(*aggr, value));

                break;

        }

    }

}

​

#ifndef KERNEL_2_4

/*********************************************************************************

 *                                                                               *

 * Function: sysfs_read_attr                                                     *

 *                                                                               *

 * Purpose: locate and read the name attribute of a sensor from sysfs            *

 *                                                                               *

 * Parameters:  device        - [IN] the path to sensor data in sysfs            *

 *              attribute     - [OUT] the sensor name                            *

 *                                                                               *

 * Return value: Subfolder where the sensor name file was found or NULL          *

 *                                                                               *

 * Comments: attribute string must be freed by caller after it's been used.      *

 *                                                                               *