Remove linux_rustix opt-in backend (#573)

As suggested
[here](#572 (review))
it may be worth to remove `linux_rustix` from the v0.3.0 release.

We probably will either return it in v0.3.1, or will introduce a
different `linux_raw` opt-in backend (see #572).

Author: newpavlov

.github/workflows/build.yml

@@ -121,9 +121,6 @@ jobs:
       - env:
           RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_getrandom"
         run: cargo build --target=${{ matrix.target }} --features=std
-      - env:
-          RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_rustix"
-        run: cargo build --target=${{ matrix.target }} --features=std
       - env:
           RUSTFLAGS: -Dwarnings --cfg getrandom_test_linux_fallback
         run: cargo build --features=std

.github/workflows/nopanic.yaml

@@ -49,13 +49,6 @@ jobs:
       - name: Check (linux_android.rs)
         run: (exit $( grep -c panic target/release/libgetrandom_wrapper.so ))
 
-      - name: Build (linux_rustix.rs)
-        env:
-          RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_rustix"
-        run: cargo build --release
-      - name: Check (linux_rustix.rs)
-        run: (exit $( grep -c panic target/release/libgetrandom_wrapper.so ))
-
       - name: Build (rdrand.rs)
         env:
           RUSTFLAGS: -Dwarnings --cfg getrandom_backend="rdrand"

.github/workflows/tests.yml

@@ -56,9 +56,6 @@ jobs:
       - env:
           RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_getrandom"
         run: cargo test --target=${{ matrix.target }} --features=std
-      - env:
-          RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_rustix"
-        run: cargo test --target=${{ matrix.target }} --features=std
       - env:
           RUSTFLAGS: -Dwarnings --cfg getrandom_test_linux_fallback
         run: cargo test --features=std

.github/workflows/workspace.yml

@@ -57,10 +57,6 @@ jobs:
       env:
         RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_getrandom"
       run: cargo clippy --target x86_64-unknown-linux-gnu
-    - name: Linux (linux_rustix.rs)
-      env:
-        RUSTFLAGS: -Dwarnings --cfg getrandom_backend="linux_rustix"
-      run: cargo clippy --target x86_64-unknown-linux-gnu
     - name: Linux (linux_android_with_fallback.rs)
       run: cargo clippy --target x86_64-unknown-linux-gnu
     - name: NetBSD (netbsd.rs)

CHANGELOG.md

@@ -36,7 +36,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `getrandom_backend` configuration flag for selection of opt-in backends [#504]
 - `Error::new_custom` method [#507]
 - `rndr` opt-in backend [#512]
-- `linux_rustix` opt-in backend [#520]
 - Automatic MemorySanitizer support [#521] [#571]
 - `u32` and `u64` functions for generating random values of the respective type [#544]
 
@@ -52,7 +51,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#504]: https://github.com/rust-random/getrandom/pull/504
 [#507]: https://github.com/rust-random/getrandom/pull/507
 [#512]: https://github.com/rust-random/getrandom/pull/512
-[#520]: https://github.com/rust-random/getrandom/pull/520
 [#521]: https://github.com/rust-random/getrandom/pull/521
 [#522]: https://github.com/rust-random/getrandom/pull/522
 [#532]: https://github.com/rust-random/getrandom/pull/532

Cargo.toml

@@ -19,13 +19,9 @@ compiler_builtins = { version = "0.1", optional = true }
 core = { version = "1.0", optional = true, package = "rustc-std-workspace-core" }
 
 # linux_android / linux_android_with_fallback
-[target.'cfg(all(any(target_os = "linux", target_os = "android"), not(any(target_env = "", getrandom_backend = "linux_rustix", getrandom_backend = "custom"))))'.dependencies]
+[target.'cfg(all(any(target_os = "linux", target_os = "android"), not(any(target_env = "", getrandom_backend = "custom"))))'.dependencies]
 libc = { version = "0.2.154", default-features = false }
 
-# linux_rustix
-[target.'cfg(all(any(target_os = "linux", target_os = "android"), any(target_env = "", getrandom_backend = "linux_rustix")))'.dependencies]
-rustix = { version = "0.38.38", default-features = false, features = ["rand"] }
-
 # apple-other
 [target.'cfg(any(target_os = "ios", target_os = "visionos", target_os = "watchos", target_os = "tvos"))'.dependencies]
 libc = { version = "0.2.154", default-features = false }
@@ -80,7 +76,7 @@ rustc-dep-of-std = ["dep:compiler_builtins", "dep:core"]
 [lints.rust.unexpected_cfgs]
 level = "warn"
 check-cfg = [
-  'cfg(getrandom_backend, values("custom", "rdrand", "rndr", "linux_getrandom", "linux_rustix", "wasm_js", "esp_idf"))',
+  'cfg(getrandom_backend, values("custom", "rdrand", "rndr", "linux_getrandom", "wasm_js", "esp_idf"))',
   'cfg(getrandom_msan)',
   'cfg(getrandom_test_linux_fallback)',
   'cfg(getrandom_test_netbsd_fallback)',

README.md

@@ -79,7 +79,6 @@ of randomness based on their specific needs:
 | Backend name      | Target               | Target Triple            | Implementation
 | ----------------- | -------------------- | ------------------------ | --------------
 | `linux_getrandom` | Linux, Android       | `*‑linux‑*`              | [`getrandom`][1] system call (without `/dev/urandom` fallback). Bumps minimum supported Linux kernel version to 3.17 and Android API level to 23 (Marshmallow).
-| `linux_rustix`    | Linux, Android       | `*‑linux‑*`              | Same as `linux_getrandom`, but uses [`rustix`] instead of `libc`.
 | `rdrand`          | x86, x86-64          | `x86_64-*`, `i686-*`     | [`RDRAND`] instruction
 | `rndr`            | AArch64              | `aarch64-*`              | [`RNDR`] register
 | `esp_idf`         | ESP-IDF              | `*‑espidf`               | [`esp_fill_random`]. WARNING: can return low-quality entropy without proper hardware configuration!
@@ -346,7 +345,6 @@ dual licensed as above, without any additional terms or conditions.
 [platform-support]: https://doc.rust-lang.org/stable/rustc/platform-support.html
 [WASI]: https://github.com/CraneStation/wasi
 [Emscripten]: https://www.hellorust.com/setup/emscripten/
-[`rustix`]: https://docs.rs/rustix
 
 [//]: # (licenses)
 

src/backends.rs

@@ -13,9 +13,6 @@ cfg_if! {
     } else if #[cfg(getrandom_backend = "linux_getrandom")] {
         mod linux_android;
         pub use linux_android::*;
-    } else if #[cfg(getrandom_backend = "linux_rustix")] {
-        mod linux_rustix;
-        pub use linux_rustix::*;
     } else if #[cfg(getrandom_backend = "rdrand")] {
         mod rdrand;
         pub use rdrand::*;