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Fix redox compilation in stdlib#6298

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youknowone merged 1 commit into
RustPython:mainfrom
willnode:redox-compile
Nov 27, 2025
Merged

Fix redox compilation in stdlib#6298
youknowone merged 1 commit into
RustPython:mainfrom
willnode:redox-compile

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@willnode

@willnode willnode commented Nov 27, 2025 •
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This fixes compilation on Redox due to cfg filter in this code, and fcntl::open here returns OwnedFd already.

This upstream version can't be compiled to Redox due to other reasons, so as a workaround this patch fix is verified in Redox build system using a backported version.

Summary by CodeRabbit

  • Refactor
    • Improved internal file descriptor handling for enhanced code maintainability. No end-user facing changes.

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coderabbitai Bot commented Nov 27, 2025 •
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Walkthrough

The close_filetable_fds function in the redox target was refactored to use OwnedFd instead of raw file descriptors. The opened filetable is now stored as an owned wrapper, with the read operation updated to pass the reference directly rather than extracting the raw fd via as_raw_fd().

Changes

Cohort / File(s) Summary
File descriptor ownership refactoring
crates/stdlib/src/posixsubprocess.rs		 Updated close_filetable_fds to use OwnedFd wrapper instead of raw fd for filetable operations; read call modified to accept OwnedFd reference directly; fd comparisons updated to call as_raw_fd() as needed

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

  • Single file change with straightforward refactoring
  • Ownership pattern improvement from raw to RAII-based wrapper
  • No logic flow alterations, only resource management improvements

Suggested reviewers

  • moreal
  • youknowone

Poem

🐰 A file descriptor now safely owned,
No longer bare, but wrapped and grown!
From raw to RAII, the pattern's clear,
Resource safety brings us cheer! ✨

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Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title 'Fix redox compilation in stdlib' directly relates to the main change: adapting code to fix Redox compilation issues by properly handling OwnedFd from fcntl::open.
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
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  • crates/stdlib/src/posixsubprocess.rs (1 hunks)
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crates/stdlib/src/posixsubprocess.rs (1)
crates/stdlib/src/fcntl.rs (1)
  • fcntl (59-90)
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🔇 Additional comments (1)
crates/stdlib/src/posixsubprocess.rs (1)

444-452: OwnedFd-based filetable handling and read call look correct

Binding filetable directly to the result of fcntl::open and using RAII for closing, plus calling nix::unistd::read(&filetable, ...), is consistent with the newer nix APIs where open returns an OwnedFd and read accepts an AsFd-based argument. The later comparison against filetable.as_raw_fd() still prevents accidentally closing the filetable descriptor itself, so behavior is preserved while fixing the Redox compilation issue.

You may want to rely on cargo clippy to confirm there are no new lints (e.g., unused imports in this block) on the updated nix/Redox toolchain. As per coding guidelines, please ensure clippy is clean for this change.

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ShaharNaveh
ShaharNaveh approved these changes Nov 27, 2025
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@ShaharNaveh ShaharNaveh left a comment

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Thanks! LGTM.
cc @youknowone

youknowone
youknowone approved these changes Nov 27, 2025
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Thanks!

@youknowone youknowone merged commit 0e6e256 into RustPython:main Nov 27, 2025
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@ShaharNaveh ShaharNaveh ShaharNaveh approved these changes

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@willnode @youknowone @ShaharNaveh