LinuxQuestions.org - Weired ctime() asctime() output

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Weired ctime() asctime() output

Erm the code firs :} :

Code:

#include <stdio.h>

#include <utmp.h>

#include <string.h>

#include <time.h>

 

int main(  )

 

{

 

 

 

 

        struct lastlog vsebina_lastloga ;

        FILE *datoteka ;

 

        if ((datoteka = fopen("/var/log/lastlog", "r+")) == NULL) 

 

        {

                fprintf(stderr,"Napaka pri odpiranju datoteke\n");

                return (9);

 

        }

 

 

                struct tm faketime ;

 

                faketime.tm_sec = 40; 

                faketime.tm_min = 54;    

                faketime.tm_hour = 21 ;

                faketime.tm_mday = 12 ;

                faketime.tm_mon = 3;  

                faketime.tm_year = 304 ;        

                faketime.tm_wday =  5 ; 

                faketime.tm_yday = 300 ;

 

 

        datoteka = fopen("/var/log/lastlog", "r+") ;

        fread(&vsebina_lastloga, sizeof(struct lastlog), 1, datoteka);

 

        printf("%s\n%s\n" , asctime(&faketime), ctime(&vsebina_lastloga.ll_time)) ;

 

        fclose(datoteka) ;

        return 0 ;

 

}

Now what i don't understand is how can this printf " printf("%s\n%s\n" , asctime(&faketime), ctime(&vsebina_lastloga.ll_time)) " prints two IDENTICAL values like this :
bash-2.05b# ./a.out
Fri Apr 12 21:54:40 2204

Fri Apr 12 21:54:40 2204

Can somebody explain me how can this succede ?

This code:

Code:

#include <stdio.h>

#include <time.h>    

#include <errno.h>

int main(int argc, char *argv[]  )



{  

    struct tm faketime ;

    time_t ll_time=86400 * 2000;

    faketime.tm_sec = 40;

    faketime.tm_min = 54;

    faketime.tm_hour = 21 ;

    faketime.tm_mday = 12 ;

    faketime.tm_mon = 3;

    faketime.tm_year = 304 ;

    faketime.tm_wday =  5 ;

    faketime.tm_yday = 300 ;    

    printf("%s\n", asctime(&faketime) );

    printf("errno =%d\n", errno);

    printf("%s\n" , ctime(&ll_time)) ;

    printf("errno =%d\n", errno);

    return 0 ;

}

Gives me this output:

Fri Apr 12 21:54:40 2204

errno =0
Mon Jun 23 18:00:00 1975

errno =0

You do know that the implementation of asctime creates allocates memory and creates a temporary struct tm