Hi Nikos,
std::sys is private and only for internal use in libstd as of now. It was
broken in the course of the Great Runtime Overhaul
https://github.com/rust-lang/rust/pull/18557
Stay tuned for updates from aturon...
Regards,
Kai
野田 開 <noda...@gmail.com>
2014-11-19 7:13 GMT+08:00 Nikos Vasilakis <ni...@vasilak.is>:
> Hi everyone,
>
> (I apologize if this is not the right mailing list for this; if not,
> please point me to the right direction).
>
> At a high level, I am trying to get the file descriptor for a file I
> am opening -- the reason for this is I want to pass it on to ioctl
> later on. I am trying two approaches here:
>
> 1. Use libc FFI, and create and pass around a sys::fs::FileDesc. This
> worked until today, when I updated to latest rustc (using rustup).
> Now, trying to compile, gives me "unresolved import
> `sys::fs::FileDesc`. Maybe a missing `extern crate sys`?". (and extern
> does not work, can't find crate).
>
> Looking in the rust-lang source, however, I see it being used (and
> being imported) exactly as I do above (e.g.,
> libstd/sys/unix/{helper_signal.rs, process.rs}). So, what's going on?
>
> 2. (Try to) Use regular, rust-y std::io::{File, Open, ReadWrite}, and
> try to use the `as_fd()` method on the `File` result I get from open.
> This is somewhat undocumented, but I came across the method in fs.rs
> source [1] (I think I intuitively understand what
> `sys_common::AsFileDesc` means in `impl sys_common::AsFileDesc for
> File`), and I then saw that process.rs actually uses it, of course
> after doing `use sys_common::{AsFileDesc}` at the beginning, as my
> intuition suggested. Still though, I get a similar error to (1) above,
> i.e., `unresolved import `sys_common::AsFileDesc`. Maybe a missing
> `extern crate sys_common`?` What's going on here?
>
> What doesn't any of these imports work? Also, where is the
> `sys_common` documented? And, most importantly, how do I get to play
> with file descriptors, without implementing the abstraction myself (in
> the case of (1), for instance)?
>
> Thanks!
> Nikos
>
>
> [1]
> http://doc.rust-lang.org/src/std/home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libstd/io/fs.rs.html#91-95
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