Date conversion and calculating elapsed times

[Mike Duffy]

Hi,

Does anyone know how to convert a date/time into seconds and then calculate the elapsed time between two times?

Thanks in advance.

[Kenneth_19]

I have a similar program in C which might fit you, it turns two dates into seconds and compare their difference:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include
#include
#include
#include
#include

int main(argc, argv)
int argc;
char *argv[];
{
struct tm st_time, en_time;
time_t start, finish;
double diff_time;

if (argc != 13)
{
printf("usage: timediff fm_yr fm_mon fm_day fm_hr fm_min fm_sec to_yr to_mon to_day to_hr to_min to_sec\n");
printf(" where fm_yr and to_yr are years in 4 digits\n");
printf(" and fm_hr and to_hr are hours in 24 hours time.\n\n");
printf("timediff returns the difference of two inputs in seconds\n");
}
else
{

st_time.tm_year = atoi(argv[1])-1900;
st_time.tm_mon = atoi(argv[2])-1;
st_time.tm_mday = atoi(argv[3]);
st_time.tm_hour = atoi(argv[4]);
st_time.tm_min = atoi(argv[5]);
st_time.tm_sec = atoi(argv[6]);
st_time.tm_isdst = 0;

en_time.tm_year = atoi(argv[7])-1900;
en_time.tm_mon = atoi(argv[8])-1;
en_time.tm_mday = atoi(argv[9]);
en_time.tm_hour = atoi(argv[10]);
en_time.tm_min = atoi(argv[11]);
en_time.tm_sec = atoi(argv[12]);
en_time.tm_isdst = 0;

finish = mktime(&en_time);
start = mktime(&st_time);
/*
printf("%ld, %s", start, ctime(&start));
printf("%ld, %s", finish, ctime(&finish));
*/
diff_time = difftime(finish,start);
/*
printf( "\nDelay time = %6.0f seconds.\n", diff_time );
*/
printf( "%-6.0f\n",diff_time );
}
return 0;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Mike Duffy]

Hi,

Somethink in Korn shell would be nice.

[Pete Randall]

You should take a look at A Clay Stephenson's "date hammer". A boolean forum search on +"date" +"hammer" +"Clay" turned up many threads, one of which is:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xea948cc5e03fd6118fff0090279cd0f9,00.html

Hope This Helps,
Pete

[nanthakishore]

start_time=$SECONDS
sleep 5
end_time=$SECONDS

elapsed_time=expr $start_time - $end_time`

echo $elapsed_time

[nanthakishore]

Sorry,

it should be like this,
elapsed_time=expr $end_time - $start_time`