e07df9c9df
filedesc: don't use ioctl(FIOCLEX) on Linux All `ioctl(2)`s will fail on `O_PATH` file descriptors on Linux (because they use `&empty_fops` as a security measure against `O_PATH` descriptors affecting the backing file). As a result, `File::try_clone()` and various other methods would always fail with `-EBADF` on `O_PATH` file descriptors. The solution is to simply use `F_SETFD` (as is used on other unices) which works on `O_PATH` descriptors because it operates through the `fnctl(2)` layer and not through `ioctl(2)`s. Since this code is usually only used in strange error paths (a broken or ancient kernel), the extra overhead of one syscall shouldn't cause any dramas. Most other systems programming languages also use the fnctl(2) so this brings us in line with them. Fixes: rust-lang/rust#62314 Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
This directory contains the source code of the rust project, including:
rustcand its testslibstd- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc guide.
There is also useful content in the following READMEs, which are gradually being moved over to the guide:
- https://github.com/rust-lang/rust/tree/master/src/librustc/ty/query
- https://github.com/rust-lang/rust/tree/master/src/librustc/dep_graph
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/higher_ranked
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/lexical_region_resolve