ci: Use ./ with shebangs rather than sh or bash

The scripts say how they should execute, there isn't any reason to
duplicate this wherever they are called.

.github/workflows/ci.yaml

@@ -9,16 +9,20 @@ env:
   CARGO_TERM_VERBOSE: true
   LIBC_CI: 1
 
+defaults:
+  run:
+    shell: bash
+
 jobs:
   style_check:
     name: Style check
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: sh ./ci/install-rust.sh
+        run: ./ci/install-rust.sh
       - name: Check style
-        run: sh ci/style.sh
+        run: ./ci/style.sh
 
   build_channels_linux:
     name: Build Channels Linux
@@ -37,9 +41,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TOOLCHAIN=${{ matrix.toolchain }} sh ./ci/install-rust.sh
+        run: TOOLCHAIN=${{ matrix.toolchain }} ./ci/install-rust.sh
       - name: Execute build.sh
-        run: TOOLCHAIN=${{ matrix.toolchain }} sh ./ci/build.sh
+        run: TOOLCHAIN=${{ matrix.toolchain }} ./ci/build.sh
 
   build_channels_macos:
     name: Build Channels macOS
@@ -59,9 +63,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TOOLCHAIN=${{ matrix.target.toolchain }} sh ./ci/install-rust.sh
+        run: TOOLCHAIN=${{ matrix.target.toolchain }} ./ci/install-rust.sh
       - name: Execute build.sh
-        run: TOOLCHAIN=${{ matrix.target.toolchain }} sh ./ci/build.sh
+        run: TOOLCHAIN=${{ matrix.target.toolchain }} ./ci/build.sh
 
   build_channels_windows:
     name: Build Channels Windows
@@ -80,7 +84,7 @@ jobs:
         run: rustup self update
         shell: bash
       - name: Execute build.sh
-        run: TOOLCHAIN=${{ matrix.toolchain }} sh ./ci/build.sh
+        run: TOOLCHAIN=${{ matrix.toolchain }} ./ci/build.sh
         shell: bash
 
   macos:
@@ -94,9 +98,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
       - name: Execute run.sh
-        run: sh ./ci/run.sh ${{ matrix.target }}
+        run: ./ci/run.sh ${{ matrix.target }}
 
   windows:
     name: Windows
@@ -124,10 +128,10 @@ jobs:
         run: rustup self update
         shell: bash
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
         shell: bash
       - name: Execute run.sh
-        run: sh ./ci/run.sh ${{ matrix.target }}
+        run: ./ci/run.sh ${{ matrix.target }}
         shell: bash
 
 
@@ -143,9 +147,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
       - name: Execute run-docker.sh
-        run: sh ./ci/run-docker.sh ${{ matrix.target }}
+        run: ./ci/run-docker.sh ${{ matrix.target }}
 
   docker_linux_tier2:
     name: Docker Linux Tier2
@@ -185,9 +189,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
       - name: Execute run-docker.sh
-        run: sh ./ci/run-docker.sh ${{ matrix.target }}
+        run: ./ci/run-docker.sh ${{ matrix.target }}
 
   solaris:
     name: Solaris
@@ -214,15 +218,15 @@ jobs:
             uname -a
           run: |
             export PATH=$HOME/.rust_solaris/bin:$PATH
-            bash ./ci/run.sh ${{ matrix.target }}
+            ./ci/run.sh ${{ matrix.target }}
 
   check_cfg:
     name: "Check #[cfg]s"
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TOOLCHAIN=nightly sh ./ci/install-rust.sh
+        run: TOOLCHAIN=nightly ./ci/install-rust.sh
       - name: Build with check-cfg
         run: LIBC_CHECK_CFG=1 cargo build -Z unstable-options -Z check-cfg
 

CONTRIBUTING.md

@@ -93,7 +93,7 @@ We have two automated tests running on
   - `cd libc-test && cargo test`
   - Use the `skip_*()` functions in `build.rs` if you really need a workaround.
 2. Style checker
-  - [`sh ci/style.sh`](https://github.com/rust-lang/libc/blob/main/ci/style.sh)
+  - [`./ci/style.sh`](https://github.com/rust-lang/libc/blob/main/ci/style.sh)
 
 ## Breaking change policy
 

ci/build.sh

@@ -199,7 +199,7 @@ esac
 for target in $targets; do
     if echo "$target" | grep -q "$filter"; then
         if [ "${OS}" = "windows" ]; then
-            TARGET="$target" sh ./ci/install-rust.sh
+            TARGET="$target" ./ci/install-rust.sh
             test_target build "$target"
         else
             test_target build "$target"

ci/docker/aarch64-linux-android/Dockerfile

@@ -20,8 +20,8 @@ COPY android* /android/
 ENV ANDROID_ARCH=aarch64
 ENV PATH=$PATH:/android/linux-x86_64/bin:/android/sdk/cmdline-tools/tools:/android/sdk/platform-tools
 
-RUN sh /android/android-install-ndk.sh
-RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN /android/android-install-ndk.sh
+RUN /android/android-install-sdk.sh $ANDROID_ARCH
 RUN mv /root/.android /tmp
 RUN chmod 777 -R /tmp/.android
 RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linux-x86_64/*

ci/docker/aarch64-unknown-linux-musl/Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc-aarch64-linux-gnu qemu-user
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh aarch64
+RUN /install-musl.sh aarch64
 
 # FIXME: shouldn't need the `-lgcc` here, shouldn't that be in std?
 ENV PATH=$PATH:/musl-aarch64/bin:/rust/bin \

ci/docker/arm-linux-androideabi/Dockerfile

@@ -20,8 +20,8 @@ COPY android* /android/
 ENV ANDROID_ARCH=arm
 ENV PATH=$PATH:/android/linux-x86_64/bin:/android/sdk/cmdline-tools/tools:/android/sdk/platform-tools
 
-RUN sh /android/android-install-ndk.sh
-RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN /android/android-install-ndk.sh
+RUN /android/android-install-sdk.sh $ANDROID_ARCH
 RUN mv /root/.android /tmp
 RUN chmod 777 -R /tmp/.android
 RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linux-x86_64/*

ci/docker/arm-unknown-linux-musleabihf/Dockerfile

@@ -8,7 +8,7 @@ RUN sed -i -E 's/(archive|security)\.ubuntu\.com/old-releases.ubuntu.com/g' \
         gcc-arm-linux-gnueabihf qemu-user
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh arm
+RUN /install-musl.sh arm
 
 ENV PATH=$PATH:/musl-arm/bin:/rust/bin \
     CC_arm_unknown_linux_musleabihf=musl-gcc \

ci/docker/asmjs-unknown-emscripten/Dockerfile

@@ -18,7 +18,7 @@ RUN apt-get install -y --no-install-recommends \
     bzip2
 
 COPY emscripten.sh /
-RUN bash /emscripten.sh
+RUN /emscripten.sh
 
 ENV PATH=$PATH:/rust/bin \
     CARGO_TARGET_ASMJS_UNKNOWN_EMSCRIPTEN_RUNNER=node

ci/docker/i686-linux-android/Dockerfile

@@ -20,8 +20,8 @@ COPY android* /android/
 ENV ANDROID_ARCH=i686
 ENV PATH=$PATH:/android/linux-x86_64/bin:/android/sdk/cmdline-tools/tools:/android/sdk/platform-tools
 
-RUN sh /android/android-install-ndk.sh
-RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN /android/android-install-ndk.sh
+RUN /android/android-install-sdk.sh $ANDROID_ARCH
 RUN mv /root/.android /tmp
 RUN chmod 777 -R /tmp/.android
 RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linux-x86_64/*

ci/docker/i686-unknown-linux-musl/Dockerfile

@@ -9,7 +9,7 @@ RUN sed -i -E 's/(archive|security)\.ubuntu\.com/old-releases.ubuntu.com/g' \
         gcc-multilib make libc6-dev git curl ca-certificates libc6-i386
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh i686
+RUN /install-musl.sh i686
 
 ENV PATH=$PATH:/musl-i686/bin:/rust/bin \
     CC_i686_unknown_linux_musl=musl-gcc \

ci/docker/loongarch64-unknown-linux-musl/Dockerfile

@@ -4,7 +4,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         ca-certificates curl gcc git libc6-dev make qemu-user xz-utils
 
 COPY install-musl-cross.sh /
-RUN sh /install-musl-cross.sh loongarch64-unknown-linux-musl
+RUN /install-musl-cross.sh loongarch64-unknown-linux-musl
 
 ENV CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_LINKER=loongarch64-unknown-linux-musl-gcc \
     CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_RUNNER="qemu-loongarch64" \

ci/docker/s390x-unknown-linux-gnu/Dockerfile

@@ -8,7 +8,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         cpio
 
 COPY linux-s390x.sh /
-RUN bash /linux-s390x.sh
+RUN /linux-s390x.sh
 
 COPY test-runner-linux /
 

ci/docker/s390x-unknown-linux-musl/Dockerfile

@@ -7,7 +7,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         qemu-user
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh s390x
+RUN /install-musl.sh s390x
 
 # FIXME: shouldn't need the `-lgcc` here, shouldn't that be in std?
 ENV CARGO_TARGET_S390X_UNKNOWN_LINUX_GNU_LINKER=s390x-linux-gnu-gcc \

ci/docker/sparc64-unknown-linux-gnu/Dockerfile

@@ -15,7 +15,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         p7zip-full cpio linux-libc-dev-sparc64-cross
 
 COPY linux-sparc64.sh /
-RUN bash /linux-sparc64.sh
+RUN /linux-sparc64.sh
 
 COPY test-runner-linux /
 

ci/docker/wasm32-unknown-emscripten/Dockerfile

@@ -26,7 +26,7 @@ RUN apt-get install -y --no-install-recommends \
 RUN ln -s /usr/bin/python3 /usr/bin/python & \
     ln -s /usr/bin/pip3 /usr/bin/pip
 COPY emscripten.sh /
-RUN bash /emscripten.sh
+RUN /emscripten.sh
 
 ENV PATH=$PATH:/rust/bin \
     CARGO_TARGET_WASM32_UNKNOWN_EMSCRIPTEN_RUNNER=node-wrapper.sh

ci/docker/wasm32-wasip1/Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:24.10
 
 COPY wasi.sh /
-RUN bash /wasi.sh
+RUN /wasi.sh
 
 # Note that `-D_WASI_EMULATED_PROCESS_CLOCKS` is used to enable access to
 # clock-related defines even though they're emulated. Also note that the usage

ci/docker/wasm32-wasip2/Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:24.10
 
 COPY wasi.sh /
-RUN bash /wasi.sh
+RUN /wasi.sh
 
 # Note that most of these are copied from `wasm32-wasip1/Dockerfile`
 #

ci/docker/x86_64-linux-android/Dockerfile

@@ -12,12 +12,12 @@ RUN apt-get update && \
 WORKDIR /android/
 ENV ANDROID_ARCH=x86_64
 COPY android-install-ndk.sh /android/
-RUN sh /android/android-install-ndk.sh
+RUN /android/android-install-ndk.sh
 
 # We do not run x86_64-linux-android tests on an android emulator.
 # See ci/android-sysimage.sh for information about how tests are run.
 COPY android-sysimage.sh /android/
-RUN bash /android/android-sysimage.sh x86_64 x86_64-24_r07.zip
+RUN /android/android-sysimage.sh x86_64 x86_64-24_r07.zip
 
 ENV PATH=$PATH:/rust/bin:/android/linux-x86_64/bin \
     CARGO_TARGET_X86_64_LINUX_ANDROID_LINKER=x86_64-linux-android28-clang \

ci/docker/x86_64-unknown-linux-musl/Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh x86_64
+RUN /install-musl.sh x86_64
 
 ENV PATH=$PATH:/musl-x86_64/bin:/rust/bin \
     RUSTFLAGS="-L /musl-x86_64/lib"