forked from pool/ignition
71 lines
2.1 KiB
Plaintext
71 lines
2.1 KiB
Plaintext
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#!/bin/bash
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# Based on Ignition's examples/ignition-kargs-helper
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set -euxo pipefail
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grubcfg="/sysroot/etc/default/grub"
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# Mount root file system. Note that we mount /boot but we don't unmount it
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# because we are run in a systemd unit with MountFlags=slave so it is unmounted
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# for us.
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. /dracut-state.sh
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mount "${root#block:}" "${NEWROOT}"
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# Also mount x-initrd.mount flagged mounts to get the current /etc state
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awk '$4 ~ /x-initrd.mount/ { system("findmnt /sysroot" $2 " >/dev/null || mount -t " $3 " -o " $4 " " $1 " /sysroot" $2) }' /sysroot/etc/fstab
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orig_kernelopts="$(grep GRUB_CMDLINE_LINUX_DEFAULT "${grubcfg}")"
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orig_kernelopts="${orig_kernelopts#*=}"
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# trim the leading and trailing quote
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orig_kernelopts="${orig_kernelopts:1:-1}"
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# add leading and trailing whitespace to allow for easy sed replacements
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kernelopts=" $orig_kernelopts "
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while [[ $# -gt 0 ]]
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do
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key="$1"
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case $key in
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--should-exist)
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arg="$2"
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# don't repeat the arg
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if [[ ! "${kernelopts[*]}" =~ " ${arg} " ]]; then
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kernelopts="$kernelopts$arg "
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fi
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shift 2
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;;
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--should-not-exist)
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kernelopts="$(echo "$kernelopts" | sed "s| $2 | |g")"
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shift 2
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;;
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*)
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echo "Unknown option"
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exit 1
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;;
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esac
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done
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# trim the leading and trailing whitespace
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kernelopts="$(echo "$kernelopts" | sed -e 's,^[[:space:]]*,,' -e 's,[[:space:]]*$,,')"
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# only apply the changes & reboot if changes have been made
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if [[ "$kernelopts" != "$orig_kernelopts" ]]; then
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combustiondir="/run/combustion/mount/combustion"
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mkdir -p "${combustiondir}"
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# escape escapes to survive the multiple shell invocations
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kernelopts="${kernelopts//\\/\\\\\\\\}"
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kernelopts="${kernelopts//$/\\\$}"
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cat << EOF > "${combustiondir}/script"
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sed -i "s|^\(GRUB_CMDLINE_LINUX_DEFAULT=\).*|\1\"$kernelopts\"|" /etc/default/grub
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/usr/sbin/grub2-mkconfig > /boot/grub2/grub.cfg
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EOF
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SYSTEMD_OFFLINE=1 combustion
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# Reset health-checker to prevent an unintended rollback
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echo "Clearing GRUB flag"
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chroot /sysroot grub2-editenv - set health_checker_flag=0 || true
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reboot
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fi
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