Matthias Krüger 6d1cdcaee5 Rollup merge of #105458 - Ayush1325:blocking_spawn, r=Mark-Simulacrum ...

Allow blocking `Command::output`

### Problem
Currently, `Command::output` is internally implemented using `Command::spawn`. This is problematic because some targets (like UEFI) do not actually support multitasking and thus block while the program is executing. This coupling does not make much sense as `Command::output` is supposed to block until the execution is complete anyway and thus does not need to rely on a non-blocking `Child` or any other intermediate.

### Solution
This PR moves the implementation of `Command::output` to `std::sys`. This means targets can choose to implement only `Command::output` without having to implement `Command::spawn`.

### Additional Information

This was originally conceived when working on https://github.com/rust-lang/rust/pull/100316. Currently, the only target I know about that will benefit from this change is UEFI.

This PR can also be used to implement more efficient `Command::output` since the intermediate `Process` is not actually needed anymore, but that is outside the scope of this PR.

Since this is not a public API change, I'm not sure if an RFC is needed or not.

2022-12-17 23:44:26 +01:00

..

fd

I/O safety.

2021-08-19 12:02:39 -07:00

kernel_copy

add test for failing io::copy specialization

2021-02-22 21:41:32 +01:00

locks

std: cleanup timeouts in pthread condvar

2022-12-02 14:38:20 +01:00

os

Refactor weak symbols in std::sys::unix

2021-11-12 15:25:16 -08:00

os_str

Expose Utf8Lossy as Utf8Chunks

2022-08-20 12:49:20 -04:00

process

Rollup merge of #105458 - Ayush1325:blocking_spawn, r=Mark-Simulacrum

2022-12-17 23:44:26 +01:00

thread_parker

std: cleanup timeouts in pthread condvar

2022-12-02 14:38:20 +01:00

alloc.rs

Horizon OS STD support

2022-06-13 20:44:39 -07:00

android.rs

Refactor weak symbols in std::sys::unix

2021-11-12 15:25:16 -08:00

args.rs

Library changes for Apple WatchOS

2022-07-20 08:57:36 +01:00

cmath.rs

Reuse unix::cmath

2021-04-28 14:25:04 +02:00

env.rs

Library changes for Apple WatchOS

2022-07-20 08:57:36 +01:00

fd.rs

Address reviewer comments

2022-08-18 10:34:40 +01:00

fs.rs

Rollup merge of #105399 - mikebenfield:lfs, r=thomcc

2022-12-14 17:17:56 +01:00

futex.rs

std: panic instead of deadlocking in mutex implementation on Fuchsia

2022-07-18 10:56:10 +02:00

io.rs

Add IsTerminal trait to determine if a descriptor or handle is a terminal

2022-10-15 00:35:38 +01:00

kernel_copy.rs

Use more LFS functions.

2022-12-07 19:58:04 +00:00

l4re.rs

Use Rust 2021 prelude in std itself.

2022-05-09 11:12:32 +02:00

memchr.rs

mark FIXMES for all the places found that are probably offset_from

2022-03-29 20:18:28 -04:00

mod.rs

Use more LFS functions.

2022-12-07 19:58:04 +00:00

net.rs

Rollup merge of #96334 - devnexen:socket_mark, r=dtolnay

2022-08-29 06:34:42 +02:00

os_str.rs

Expose Utf8Lossy as Utf8Chunks

2022-08-20 12:49:20 -04:00

os.rs

Reduce CString allocations in std as much as possible

2022-10-03 11:13:17 -07:00

path.rs

Unix path::absolute: Fix leading "." component

2022-03-05 17:57:12 +00:00

pipe.rs

Add read_to_end for AnonPipe

2022-12-08 18:12:15 +05:30

rand.rs

Revert "Use getentropy when possible on all Apple platforms"

2022-10-05 00:48:22 -05:00

stack_overflow.rs

Use more LFS functions.

2022-12-07 19:58:04 +00:00

stdio.rs

Consolidate AsFd instances for stdio types into library/std/src/os/fd/owned.rs

2022-10-10 14:47:22 +01:00

thread_local_dtor.rs

sync thread_local key conditions exactly with what the macro uses

2022-10-13 14:09:08 +02:00

thread_local_key.rs

std: optimize TLS on Windows

2022-10-08 20:19:21 +02:00

thread.rs

Rollup merge of #105399 - mikebenfield:lfs, r=thomcc

2022-12-14 17:17:56 +01:00

time.rs

std: cleanup timeouts in pthread condvar

2022-12-02 14:38:20 +01:00

weak.rs

Reimplement weak! using Option.

2022-12-05 15:05:43 -08:00