In FreeBSD, how can I determine the size of a file in C++ when the file is
greater than 4gb?
Currently, I use stat() and use st_size. That is limited to 4gb (32bit
unsigned int)
I could use st_blocks, but that wouldn't give me the exact size.
(st_blocks -1) * 512 + (st_size % 512)
This would make sense, but in tests st_blocks is larger than I would expect.
I assume it means that st_blocks is how many blocks the file takes up on the
filesystem, and does not directly translate to how large the file is.
Backgound:
I have some C++ utilities for manipulating files. I have recently (and not
supprisingly) discovered that my program has issues with file sizes greater
than 4gb because I use an unsigned int for something. I guess I will have
to switch to unsigned long long, which appears to be a 64bit int.
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