ina260-zmq-publisher/src/logger.c

//  Weather update client
//  Connects SUB socket to tcp://localhost:5556
//  Collects weather updates and finds avg temp in zipcode
#include <zmq.h>
#include <assert.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/stat.h>
#include "utils.h"
#include <time.h>

// Global:
char *__client;
char __logdir[255];
char __regpower[100];
int __loginterval;

int main (int argc, char *argv [])
{
  if(argc != 4){
    printf("Usage: %s <abslogdir> <client> <loginterval>",argv[0]);
    exit(1);
  }

  //----- Init global variables
  __client=argv[2];
  __loginterval=atoi(argv[3]);
  // __logdir:
  strcat(__logdir,argv[1]);
  strcat(__logdir,"/");
  strcat(__logdir,__client);
  // __regpower:
  strcat(__regpower,INA260_SYSFS);
  strcat(__regpower,"/");
  strcat(__regpower,__client);
  strcat(__regpower,"/");
  strcat(__regpower,INA260_POWER_REGISTER);

  //----- Sanity checks
  mkdirp(__logdir);
  if(__loginterval<MIN_INTERVAL){
    printf("Log interval is too small (min=%ds)\n",MIN_INTERVAL);
    exit(2);
  }
  if(FILE_EXISTS(__regpower)){
    printf("Logger cannot access to %s\n",__regpower);
    exit(3);
  }

  //----- Start logging
  printf("Logger started [client=%s,interval=%ds]\n",__client,__loginterval);

  FILE *regptr,*logptr;
  char logfilepath[255]="";
  regptr=fopen("/home/loic/out.txt","r");
  char buffer[255];
  int power;
  time_t interval;

  while(1){
    interval=INTERVAL(__loginterval);
    *logfilepath='\0';
    sprintf(logfilepath,"%s/%ld",__logdir,interval);
    logptr=fopen(logfilepath,"w");
    fprintf(logptr,"timestamp,power\n");
    // Log current interval
    while((TIMESTAMP()-interval)<__loginterval){
      fgets(buffer,255,regptr);
      power=atoi(buffer);
      fprintf(logptr,"%ld,%d\n",TIMESTAMP(),power);
      fseek(regptr,0,SEEK_SET);
      sleep(1);
      printf("Tick\n");
    }
    fclose(logptr);
  }

  fclose(regptr);
  return 0;
}