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b320b56cca
Without --force, the boot process races with service shutdown, leaving enough time for the disks stage to start. With --force, systemd immediately kills processes, unmounts filesystems, and reboots.
52 lines
1.3 KiB
Bash
Executable File
52 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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# Requires sed to be present
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set -euxo pipefail
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# Mount /boot. Note that we mount /boot but we don't unmount it because we
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# are run in a systemd unit with MountFlags=slave so it is unmounted for us.
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bootmnt=/mnt/boot_partition
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mkdir -p ${bootmnt}
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bootdev=/dev/disk/by-label/boot
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mount -o rw ${bootdev} ${bootmnt}
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grubcfg="${bootmnt}/grub/grub.cfg"
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orig_kernelopts="$(grep kernelopts= $grubcfg | sed s,^kernelopts=,,)"
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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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sed -i "s|^\(kernelopts=\).*|\1$kernelopts|" $grubcfg
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systemctl reboot --force
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fi
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