79 lines
2.2 KiB
Bash
Executable File
79 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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echo "*** GENERATE ROOTFS BEGIN ***"
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SRC_ROOT=$(pwd)
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# Remember the glibc prepared folder.
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GLIBC_PREPARED=$(pwd)/work/glibc/glibc_prepared
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# Remember the BysyBox install folder.
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BUSYBOX_INSTALLED=$(pwd)/work/busybox/busybox_installed
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cd work
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echo "Preparing initramfs work area..."
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rm -rf rootfs
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# Copy all BusyBox generated stuff to the location of our 'initramfs' folder.
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cp -r $BUSYBOX_INSTALLED rootfs
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# Copy all rootfs resources to the location of our 'initramfs' folder.
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cp -r src/minimal_rootfs/* rootfs
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cd rootfs
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# Remove 'linuxrc' which is used when we boot in 'RAM disk' mode.
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rm -f linuxrc
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# Read the 'COPY_SOURCE_ROOTFS' property from '.config'
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COPY_SOURCE_ROOTFS="$(grep -i ^COPY_SOURCE_ROOTFS $SRC_ROOT/.config | cut -f2 -d'=')"
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if [ "$COPY_SOURCE_ROOTFS" = "true" ] ; then
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# Copy all prepared source files and folders to '/src'. Note that the scripts
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# will not work there because you also need proper toolchain.
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cp -r ../src src
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echo "Source files and folders have been copied to '/src'."
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else
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echo "Source files and folders have been skipped."
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fi
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# This is for the dynamic loader. Note that the name and the location are both
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# specific for 32-bit and 64-bit machines. First we check the BusyBox executable
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# and then we copy the dynamic loader to its appropriate location.
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BUSYBOX_ARCH=$(file bin/busybox | cut -d' ' -f3)
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if [ "$BUSYBOX_ARCH" = "64-bit" ] ; then
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mkdir lib64
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cp $GLIBC_PREPARED/lib/ld-linux* lib64
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echo "Dynamic loader is accessed via '/lib64'."
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else
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cp $GLIBC_PREPARED/lib/ld-linux* lib
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echo "Dynamic loader is accessed via '/lib'."
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fi
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# Copy all necessary 'glibc' libraries to '/lib' BEGIN.
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# BusyBox has direct dependencies on these libraries.
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cp $GLIBC_PREPARED/lib/libm.so.6 lib
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cp $GLIBC_PREPARED/lib/libc.so.6 lib
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# These libraries are necessary for the DNS resolving.
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cp $GLIBC_PREPARED/lib/libresolv.so.2 lib
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cp $GLIBC_PREPARED/lib/libnss_dns.so.2 lib
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# Copy all necessary 'glibc' libraries to '/lib' END.
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strip -g \
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$SRC_ROOT/work/rootfs/bin/* \
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$SRC_ROOT/work/rootfs/sbin/* \
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$SRC_ROOT/work/rootfs/lib/* \
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2>/dev/null
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echo "Reduced the size of libraries and executables."
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echo "The initramfs area has been generated."
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cd $SRC_ROOT
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echo "*** GENERATE ROOTFS END ***"
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