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Currently if a standard I/O handle is set to inherited on Windows, no action is
taken and the slot in the process information description is set to
`INVALID_HANDLE_VALUE`. Due to our passing of `STARTF_USESTDHANDLES`, however,
this means that the handle is actually set to nothing and if a child tries to
print it will generate an error.
This commit fixes this behavior by explicitly creating stdio handles to be
placed in these slots by duplicating the current process's I/O handles. This is
presumably what previously happened silently by using a file-descriptor-based
implementation instead of a `HANDLE`-centric implementation.
Along the way this cleans up a lot of code in `Process::spawn` for Windows by
ensuring destructors are always run, using more RAII, and limiting the scope of
`unsafe` wherever possible.
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Conflicts:
src/test/run-pass/task-stderr.rs
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This API was exercised in a few tests and mirrors the `from_str_radix`
functionality of the integer types.
Conflicts:
src/doc/trpl/traits.md
src/libstd/sys/windows/fs2.rs
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The current implementation of using GetFinalPathNameByHandle actually reads all
intermediate links instead of just looking at the current link. This commit
alters the behavior of the function to use a different API which correctly reads
only one level of the soft link.
[breaking-change]
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This commit stabilizes the platform-specific `io` modules, specifically around
the traits having to do with the raw representation of each object on each
platform.
Specifically, the following material was stabilized:
* `AsRaw{Fd,Socket,Handle}`
* `RawFd` (renamed from `Fd`)
* `RawHandle` (renamed from `Handle`)
* `RawSocket` (renamed from `Socket`)
* `AsRaw{Fd,Socket,Handle}` implementations
* `std::os::{unix, windows}::io`
The following material was added as `#[unstable]`:
* `FromRaw{Fd,Socket,Handle}`
* Implementations for various primitives
There are a number of future improvements that are possible to make to this
module, but this should cover a good bit of functionality desired from these
modules for now. Some specific future additions may include:
* `IntoRawXXX` traits to consume the raw representation and cancel the
auto-destructor.
* `Fd`, `Socket`, and `Handle` abstractions that behave like Rust objects and
have nice methods for various syscalls.
At this time though, these are considered backwards-compatible extensions and
will not be stabilized at this time.
This commit is a breaking change due to the addition of `Raw` in from of the
type aliases in each of the platform-specific modules.
[breaking-change]
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The windows/unix modules were currently inconsistent about the traits being
implemented for `DirEntry` and there isn't much particular reason why the traits
*couldn't* be implemented for `ReadDir` and `DirEntry`, so this commit ensures
that they are implemented.
Closes #22577
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Per [RFC 579](https://github.com/rust-lang/rfcs/pull/579), this commit
adds a new `std::process` module. This module is largely based on the
existing `std::old_io::process` module, but refactors the API to use
`OsStr` and other new standards set out by IO reform.
The existing module is not yet deprecated, to allow for the new API to
get a bit of testing before a mass migration to it.
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This commit is an implementation of [RFC 739][rfc] which adds a new `std::fs`
module to the standard library. This module provides much of the same
functionality as `std::old_io::fs` but it has many tweaked APIs as well as uses
the new `std::path` module.
[rfc]: https://github.com/rust-lang/rfcs/pull/739
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