fs::metadata - Value too large for defined data type

[szagi3891]

When i try get info abouth file with function : .metadata()
https://doc.rust-lang.org/std/fs/struct.DirEntry.html#method.metadata

I get an error:
{ repr: Os { code: 75, message: "Value too large for defined data type" } }

This file is in the directory is the size : 17848195008 byte.

[sfackler]

What OS are you on?

[szagi3891]

My platform : x86, linux (debian 8)

[alexcrichton]

Yeah it looks like you're trying to open a 17GB+ file in a 32-bit binary but we currently aren't using the LFS functions which allow opening files larger than 4GB on 32-bit Linux platforms.

I think this should be a pretty easy change to make, just gotta tweak some structs here and ther!

[alexcrichton]

triage: I-nominated

Seems like a good thing to categorize on behalf of the libs team though. This will have ramifications on the std::os module (e.g. the stat structure exposed) which may be good to discuss.

[cuviper]

This discussion was just rekindled on the internals LFS thread too.

I'd like to take this on, if no one else is already doing it.

[alexcrichton]

@cuviper feel free!

[cuviper]

Just a small update, I did get a little time to work on this over the holiday, but it's not pull-worthy yet. There's some overlap with #30175 though in fixing up dirent, where LFS wants dirent64, so I think it will make sense for me to wait for that to merge and then build on top.

[alexcrichton]

We talked about this in the libs triage meeting yesterday, and the conclusion was that I'll draft up an RFC to write about this as it'll have ramifications on std::os::raw

[alexcrichton]

I've now opened an RFC which I hope will help enable us to fix this issue in a "backwards-compatible" fashion