dcacpu.c

/*
 * If not stated otherwise in this file or this component's Licenses.txt file the
 * following copyright and licenses apply:
 *
 * Copyright 2016 RDK Management
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/
 
 
 
/**
* @defgroup dca
* @{
**/
 
 
 
 
/**
* @defgroup dca
* @{
* @defgroup src
* @{
**/
 
//cpu and free memory
#include <stdio.h>
#include "safec_lib.h"
#include <string.h>
#include <unistd.h>
 
#define MAXLEN 512
 
int getCpuUsage(char * cpuUtil);
 
/**
 * @addtogroup DCA_APIS
 * @{
 */
int main()
{
         char cpuUsage[MAXLEN] = {'\0'};
 
         if(getCpuUsage(cpuUsage))
         {
             printf("USED_CPU:%s\n", cpuUsage);
         }
         else
         {
             printf("USED_CPU:NOT AVAILABLE\n");
         }
 
         return 0;
}
 
/**
 * @brief To get CPU  usage of the device.
 *
 * @param[out] cpuUtil  CPU usage of the device.
 *
 * @return  Returns status of operation.
 * @retval  Return 1 on success.
 */
int getCpuUsage(char * cpuUtil)
{
        long double a[10], b[10],usr_cpu,total_time;
        FILE *fp;
        char cpuUtilization[MAXLEN]={'\0'};
        int i=0;
        errno_t rc = -1;
 
        for(i=0; i<5; i++)
        {
                fp = fopen("/proc/stat","r");
                if(!fp)
                {
                        return 0;
                }
                /*Coverity Fix CID:18504 CHECKED_RETURN */
                if( fscanf(fp,"%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
                &a[0],&a[1],&a[2],&a[3],&a[4],&a[5],&a[6],&a[7],&a[8],&a[9]) != 10 )
                       printf("%s:Error in fscanf()\n",__FUNCTION__);
 
                fclose(fp);
                sleep(1);
 
                fp = fopen("/proc/stat","r");
                if(!fp)
                {
                        return 0;
                }
                /*Coverity Fix CID:18504 CHECKED_RETURN */
                if( fscanf(fp,"%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
                &b[0],&b[1],&b[2],&b[3],&b[4],&b[5],&b[6],&b[7],&b[8],&b[9]) != 10 )
                       printf("Error in fscanf()\n");
              
                fclose(fp);
 
                total_time=(b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]+b[7]+b[8]+b[9])
                                -
                        (a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]+a[7]+a[8]+a[9]);
 
                usr_cpu=((b[0]-a[0])/total_time)*100;
 
                rc = sprintf_s(cpuUtilization,sizeof(cpuUtilization),"%Lf",usr_cpu);
                if(rc < EOK)
                {
                  ERR_CHK(rc);
                  return 0;
                }
        }
 
        if(cpuUtil)
        {
        rc = strcpy_s(cpuUtil,MAXLEN,cpuUtilization);
        if(rc != EOK)
        {
          ERR_CHK(rc);
          return 0;
        }
                return 1;
        }
        else
        {
                printf("Exit from getCPUusage due to NULL pointer\n");
                return 0;
        }
}
/** @} */  //END OF GROUP DCA_APIS
 
/** @} */
 
 
/** @} */
/** @} */