Q: long long int, ext3 file sizes > 2GB

From: James Lehman (james[remove)
Date: 11/27/04

Date: Sat, 27 Nov 2004 12:33:36 -0500

Hello everyone.

As hardrives get bigger and cheaper,
issues of huge data storage come up.

I did a test in Red Hat 9.0, and sure enough the implementation
of ext3 on this system supports files that are much larger than 2GB.

dd if=/dev/zero of=zero_6GB bs=1048576 count=6144

produces a file that is 6GB.

-rw-r--r-- 1 root root 6442450944 Nov 27 03:46 zero_6GB

My questions are about how to deal with this in C/C++.

When I try to open the file like this:

file_in.open(name, ios::in | ios::binary);

it fails to open.

Assuming I can get the file open some how, what about file size?

Can I get a file size that is represented as a long long int?

If there is a collected set of information about this subject
on the Web, I have not been able to find it.

Thanks very much for your time.

Have a great day! James. :o)

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