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#!/bin/bash
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# LEdoian's absurdly simple initrd generator (ad-hoc arc)
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here="$(dirname "$0")"
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set -eu
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outdir="$1"
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mkdir "$outdir/initrd"
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cp "$here/init" "$outdir/initrd/"
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busybox="$(which busybox)"
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cp "$busybox" "$outdir/initrd/busybox"
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# TODO: get kernel version from /boot/vmlinuz-linux (which we use)
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kver="$(uname -r)"
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zstdcat /usr/lib/modules/$kver/kernel/drivers/net/ethernet/intel/e1000/e1000.ko.zst > "$outdir/initrd/e1000.ko"
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pushd "$outdir/initrd"
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find . | cpio -o -H newc > ../initrd.img
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popd
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