Converting Epoch to readable date/time in C

[mukarj]

Hello
I presently have an int field representing the epoch seconds. I need to convert this into "2008/03/17 11:46:00". Can someone tell me how to do this please.

I am trying to use strftime, but it spits out incorrect values, im not sure why, maybe because its an int and not a time_t.

This is what I am doing now ..

char *format_datetime(time_t time_ptr)
{
    #ifdef LINUX
        /* convert from network endian to little endian */
        time_ptr = ntohs(time_ptr);
    #endif

    static char buf[30];
    strftime(buf,30 , "%Y%m%d %H:%M:%S",localtime(&time_ptr));

    return buf;
}

printf("%s",format_datetime(&integer_time_in_epochSec);

thanks

[wowbag1]

Here is an example and its output * strftime example */
#include <stdio.h>
#include <time.h>

int main ()
{
time_t rawtime;
struct tm * timeinfo;
char buffer [80];

time ( &rawtime );
timeinfo = localtime ( &rawtime );

strftime (buffer,80,"Now is &#37;I:%M%p.",timeinfo);
puts (buffer);

return 0;
}

Example output:


Now is 03:21PM.

As you can see it uses time_t.

Hope this may help.

[mukarj]

Turns out I was doing an extra ntohs in the code there and hence the time was coming out all messed up. Fixed that, everything seems ok now.

Thanks a lot for your help.