104 lines
3.1 KiB
Docker
104 lines
3.1 KiB
Docker
FROM frebib/debian-builder as builder
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ARG ARCH=x86_64
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ARG ARCH_ALT=i686
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ARG GLIBC_VER=2.27
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ARG BUSYB_VER=1.28.0
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ARG SU_EXEC_VER=v0.3
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ARG TINI_VER=v0.16.1
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ARG PREFIX=/output
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WORKDIR $PREFIX
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#Set up our dependencies, configure the output filesystem a bit
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RUN mkdir -p dev etc home proc root tmp usr/{bin,lib/pkgconfig,lib32} var && \
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# Set up directories in a very confusing but very worky way
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ln -sv usr/lib lib64 && \
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ln -sv usr/lib lib && \
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ln -sv usr/bin bin && \
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ln -sv usr/bin sbin && \
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ln -sv bin usr/sbin
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# Pull tini and su-exec utilities
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RUN curl -fL https://github.com/frebib/su-exec/releases/download/${SU_EXEC_VER}/su-exec-x86_64 > sbin/su-exec && \
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curl -fL https://github.com/krallin/tini/releases/download/${TINI_VER}/tini-amd64 > sbin/tini && \
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chmod +x sbin/su-exec sbin/tini
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WORKDIR /tmp/glibc/build
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# Download and build glibc from source
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RUN apt install -y bison && \
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curl -fL https://ftp.gnu.org/gnu/glibc/glibc-${GLIBC_VER}.tar.xz \
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| tar xJ --strip-components=1 -C .. && \
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\
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echo "slibdir=/usr/lib" >> configparms && \
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echo "rtlddir=/usr/lib" >> configparms && \
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echo "sbindir=/bin" >> configparms && \
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echo "rootsbindir=/sbin" >> configparms && \
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echo "build-programs=yes" >> configparms && \
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\
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../configure \
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--prefix=/usr \
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--libdir=/usr/lib \
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--libexecdir=/usr/lib \
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--enable-add-ons \
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--enable-obsolete-rpc \
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--enable-kernel=3.10.0 \
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--enable-bind-now \
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--disable-profile \
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--enable-stackguard-randomization \
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--enable-stack-protector=strong \
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--enable-lock-elision \
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--enable-multi-arch \
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--disable-werror && \
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make -j "$(nproc)" && \
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make -j "$(nproc)" install_root="$(pwd)/out" install
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RUN strip -s out/sbin/ldconfig && \
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# Patch ldd to use sh not bash
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sed -i '1s/.*/#!\/bin\/sh/' out/usr/bin/ldd && \
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sed -i 's/lib64/lib/g' out/usr/bin/ldd && \
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# Copy glibc libs & loader
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cp -d out/usr/lib/*.so* "${PREFIX}/usr/lib" && \
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cp -d out/usr/bin/ldd "${PREFIX}/bin" && \
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cp -d out/sbin/ldconfig "${PREFIX}/sbin" && \
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\
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echo /usr/lib32 > "${PREFIX}/etc/ld.so.conf"
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WORKDIR /tmp/busybox
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# Download and build busybox from source
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RUN curl -fL https://busybox.net/downloads/busybox-${BUSYB_VER}.tar.bz2 \
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| tar xj --strip-components=1 && \
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# Use default configuration
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make defconfig && \
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make -j "$(nproc)" && \
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cp busybox "${PREFIX}/bin" && \
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# "Install" busybox, creating symlinks to all binaries it provides
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./busybox --list-full | xargs -i ln -s /bin/busybox "${PREFIX}/{}"
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WORKDIR $PREFIX
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# Generate initial ld.so.cache so ELF binaries work.
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# This is important otherwise everything will error with
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# 'no such file or directory' when looking for libraries
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RUN ${PREFIX}/sbin/ldconfig -r ${PREFIX} && \
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# Copy UTC localtime to output
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cp /usr/share/zoneinfo/Etc/UTC etc/
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# =============
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FROM scratch
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WORKDIR /
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COPY --from=builder /output/ /
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# Add default skeleton configuration files
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ADD skel/* /etc/
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RUN chmod 1777 /tmp
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ENV ENV="/etc/profile"
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ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/bin
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CMD ["/bin/sh"]
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