[C] time.h -> non aggiorna il tempo

[andrew19881123]

include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>

#define CPUTEMP "/proc/acpi/thermal_zone/THRM/temperature"    /* path to the thermal cpu sensor's file */
#define TMP        "/tmp/temp"                                    /* path to the temporary file to storage datas */

int main()
{
    
    FILE *ifp;    /* referred to CPUTEMP */
    FILE *ofp;    /* referred to TMP */
    char what[9];
    int a=1000000;    /* actual cpu temperature value */ 
    int b=100;        /* min. cpu temp. */
    int c=0, i;        /* max. cpu temp. */
    time_t actual=0 /* time now */; 
    time_t mint=0 /* time at min temp */;
    time_t maxt=0 /* time at max temp */;
    time_t gotime=0 /* time at program start */;
    time_t fGotime=0 /* formatted gotime */;
    time_t fActual=0 /* formatted actual time */;
    time_t fMint=0 /* formatted min time */;
    time_t fMaxt=0 /* formatted max time */;
    
    gotime = time (NULL);
    system("date");        /* only for a good feedback on terminal */
    time ( &fGotime );
    
    fActual = fGotime;
    fMint = fGotime;
    fMaxt = fGotime;
    fGotime += 0;        /* !!!se aggiunta aggiorna i 3 valori sopra altrimenti rimangono settati a zero!!! why? */
    
    for (;;){
        for (i=0; i<10; i++){
            actual = time (NULL);
            
            ifp=fopen(CPUTEMP,"r");
            if(ifp==NULL)                               
                perror("");
            fscanf(ifp, "%s %d", *&what, &a);
            fclose(ifp);
            
            if (a<b){                /* if a<b set the current temp as min */
                mint = time (NULL);
                
                b=a;
            }
            if (a>c){                /* if a>c set the current temp as max */
                maxt = time (NULL);
                c=a;
            }
            
            usleep(500000) ;         /* sleep for .5 seconds */
        }
    
    
    //printf("%s\n\tnow: %d at %ldM %ldS\n\tmin: %d at %ldM %ldS\n\tmax: %d at %ldM %ldS\n", what, a, (actual-gotime)/60, (actual-gotime)%60, b, (mint-gotime)/60, (mint-gotime)%60, c, (maxt-gotime)/60, (maxt-gotime)%60);
    //printf("a file with temperatures of cpu is created at /tmp/temp");
    printf("fGotime: %s", ctime (&fGotime));
    printf("%ld\n%ld\n%ld\n", actual-gotime, mint-gotime, maxt-gotime);
    printf("fActu: %s fMint: %s fMaxt: %s\n", ctime (&fActual), ctime (&fMint), ctime (&fMaxt));
    
    fMint += 10; //+ (int)(mint-gotime);
    fMint += 0;
    fActual += 60; //+ (int)(actual-gotime);
    fActual += 0;
    fMaxt += 30; //+ (int)(maxt-gotime);
    fMaxt += 0;
    
    printf("fActu: %s fMint: %s fMaxt: %s\n", ctime (&fActual), ctime (&fMint), ctime (&fMaxt));
    ofp=fopen(TMP, "w+");
    if(ofp==NULL)                               
        perror("");
    fprintf(ofp, "Started: %s\n%s\n\tnow: %d at %ldM %ldS\n\tmin: %d at %ldM %ldS\n\tmax: %d at %ldM %ldS\n", ctime (&fGotime), what, a, (actual-gotime)/60, (actual-gotime)%60, b, (mint-gotime)/60, (mint-gotime)%60, c, (maxt-gotime)/60, (maxt-gotime)%60);
    fclose(ofp);
    }
    
    return 0;

il pezzo critico e' questo
fMint += 10; //+ (int)(mint-gotime);
fMint += 0;
fActual += 60; //+ (int)(actual-gotime);
fActual += 0;
fMaxt += 30; //+ (int)(maxt-gotime);
fMaxt += 0;
non riesco a capire xke' nn aggiorna questi tempi semplicemente aggiungendo degli interi, anzi sembra che aggiorni solo f actual

output

     Fri Apr  3 16:10:46 CEST 2009
fGotime: Fri Apr  3 16:10:46 2009
5
0
0
fActu: Fri Apr  3 16:10:46 2009
 fMint: Fri Apr  3 16:10:46 2009
 fMaxt: Fri Apr  3 16:10:46 2009

fActu: Fri Apr  3 16:11:46 2009
 fMint: Fri Apr  3 16:11:46 2009
 fMaxt: Fri Apr  3 16:11:46 2009

fGotime: Fri Apr  3 16:10:46 2009
10
0
0
fActu: Fri Apr  3 16:11:46 2009
 fMint: Fri Apr  3 16:11:46 2009
 fMaxt: Fri Apr  3 16:11:46 2009

fActu: Fri Apr  3 16:12:46 2009
 fMint: Fri Apr  3 16:12:46 2009
 fMaxt: Fri Apr  3 16:12:46 2009

come si vede ogni passo aumentano tutti i valori d 60..