COnverting date time in windows to unix timestamp

[Sree007]

Well i want to know if there is any code for converting the date time retrived from windows system date to a unix format,
:?:

[chrisranjana]

If you are using perl you could use any of these perl modules

http://dates.rcbowen.com/modules/Date/

[jitupatil_2007]

hey you can try this code in C#

double epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000; 
            Console.WriteLine(epoch.ToString());

this will help to convert current time to unix time stamp.

[vogu00]

The offset ( 621355968000000000) is wrong. The correct offset is

const unsigned long long  UnixTimeOffset = ((unsigned long long)(369 * 365 + 89) * 24 * 3600 * 10000000);

See ntfs-3g source code.

[sushi.at]

Just a tip: Disregard vogu00's message, the offset is indeed correct, using his suggested corrected value (after converting it into proper C# syntax) returns the year 3610 instead of 2010...

just another idea here: I wouldn't use a double to store the epoch value ... this is defined as a long

[crups]

Nope, vogu is right. I tried it. His offset
(369 * 365 + 89) * 24 * 3600 * 10000000) = 116444736000000000
is also confirmed by Microsoft (whatever that means). See http://support.microsoft.com/kb/167296 .
And in deed, the ntfs-3g uses the same value, see http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/fs/ntfs/time.h

@sushi.at: Vogu's source line is just perfect C++, no transformations needed.

[sushi.at]

Never said his code wouldn't compile in C++.... he labeled it as C# though. And when you run it in C# the offset is wrong. Seems like we got the correct offsets for both languages then...

[__avd]

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