fs: Use readdir() instead of readdir_r() on Linux and Android #92778
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@bors r+ rollup |
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📌 Commit ea9181b has been approved by |
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Hang on, there's a bug in metadata() |
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…shtriplett fs: Use readdir() instead of readdir_r() on Linux readdir() is preferred over readdir_r() on Linux and many other platforms because it more gracefully supports long file names. Both glibc and musl (and presumably all other Linux libc implementations) guarantee that readdir() is thread-safe as long as a single DIR* is not accessed concurrently, which is enough to make a readdir()-based implementation of ReadDir safe. This implementation is already used for some other OSes including Fuchsia, Redox, and Solaris. See rust-lang#40021 for more details. Fixes rust-lang#86649.
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Okay, should be fixed. |
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@bors r+ |
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…shtriplett fs: Use readdir() instead of readdir_r() on Linux readdir() is preferred over readdir_r() on Linux and many other platforms because it more gracefully supports long file names. Both glibc and musl (and presumably all other Linux libc implementations) guarantee that readdir() is thread-safe as long as a single DIR* is not accessed concurrently, which is enough to make a readdir()-based implementation of ReadDir safe. This implementation is already used for some other OSes including Fuchsia, Redox, and Solaris. See rust-lang#40021 for more details. Fixes rust-lang#86649.
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@bors r- Failed in rollup: #92878 (comment) |
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I switched Android over too, and split up the commits a bit. I would test the Android build locally but I have no idea how. Is there documentation for building Rust for Android or should I just try to follow the CI script? |
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To test android, it needs the NDK. There is a script here for getting it, but I would just use the docker image. That can be done with |
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Thanks! I ran the library tests in that Docker image and they passed. |
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☔ The latest upstream changes (presumably #93119) made this pull request unmergeable. Please resolve the merge conflicts. |
readdir() is preferred over readdir_r() on Linux and many other platforms because it more gracefully supports long file names. Both glibc and musl (and presumably all other Linux libc implementations) guarantee that readdir() is thread-safe as long as a single DIR* is not accessed concurrently, which is enough to make a readdir()-based implementation of ReadDir safe. This implementation is already used for some other OSes including Fuchsia, Redox, and Solaris. See rust-lang#40021 for more details. Fixes rust-lang#86649. Fixes rust-lang#34668.
Bionic also guarantees that readdir() is thread-safe enough.
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Rebased! Linux and Android tests still pass |
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@bors r+ rollup |
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…askrgr Rollup of 7 pull requests Successful merges: - rust-lang#90247 (Improve Duration::try_from_secs_f32/64 accuracy by directly processing exponent and mantissa) - rust-lang#91861 (Replace iterator-based construction of collections by `Into<T>`) - rust-lang#92098 (add OpenBSD platform-support page) - rust-lang#92134 (Add x86_64-pc-windows-msvc linker-plugin-lto instructions) - rust-lang#92256 (Improve selection errors for `~const` trait bounds) - rust-lang#92778 (fs: Use readdir() instead of readdir_r() on Linux and Android) - rust-lang#93338 (Update minifier crate version to 0.0.42) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Bug rust-lang#50619 was fixed by adding an end_of_stream flag in rust-lang#50630. Unfortunately, that fix only applied to the readdir_r() path. When I switched Linux to use readdir() in rust-lang#92778, I inadvertently reintroduced the bug on that platform. Other platforms that had always used readdir() were presumably never fixed. This patch enables end_of_stream for all platforms, and adds a Linux-specific regression test that should hopefully prevent the bug from being reintroduced again.
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…imulacrum fs: Fix rust-lang#50619 (again) and add a regression test Bug rust-lang#50619 was fixed by adding an end_of_stream flag in rust-lang#50630. Unfortunately, that fix only applied to the readdir_r() path. When I switched Linux to use readdir() in rust-lang#92778, I inadvertently reintroduced the bug on that platform. Other platforms that had always used readdir() were presumably never fixed. This patch enables end_of_stream for all platforms, and adds a Linux-specific regression test that should hopefully prevent the bug from being reintroduced again.
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…imulacrum fs: Fix rust-lang#50619 (again) and add a regression test Bug rust-lang#50619 was fixed by adding an end_of_stream flag in rust-lang#50630. Unfortunately, that fix only applied to the readdir_r() path. When I switched Linux to use readdir() in rust-lang#92778, I inadvertently reintroduced the bug on that platform. Other platforms that had always used readdir() were presumably never fixed. This patch enables end_of_stream for all platforms, and adds a Linux-specific regression test that should hopefully prevent the bug from being reintroduced again.
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See #40021 for more details. Fixes #86649. Fixes #34668.