Converting a user inputted date to epoch time

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# 1  
Old 09-20-2011
Converting a user inputted date to epoch time

Hi all ,

I need to know how to convert a time stamp entered by the user to be converted to GMT/UTC(epoch time) using mktime() and gmtime()
for exapample the input will be put in the form
ptm.tm_sec = 0;
ptm.tm_min = 59;
ptm.tm_hour = 11;
ptm.tm_mday = 20;
ptm.tm_mon = 9-1;
ptm.tm_year = 2011-1900;
ptm.tm_wday = 0;
ptm.tm_yday = 0;
ptm.tm_isdst = -1;

and this has to be converted to epoch time.

Thanks for your help!!
# 2  
Old 09-20-2011
Look at the mktime() function.

The function mktime(3) converts the local time, expressed in the structure
pointed to by tm into a time_t time value with the same encoding as that
of the values returned by the time(2) function, that is, seconds from the
Epoch, UTC.
# 3  
Old 09-20-2011
Take a look at this recent discussion here
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