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Add systemd-volatile

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Adds support for "systemd.volatile=state" only.
See: https://github.com/Antynea/grub-btrfs/issues/92#issuecomment-966869223

"GRUB_BTRFS_SYSTEMD_VOLATILE" must be true.
The default init on the snapshot should be "systemd".
The snapshot must have the tag "ro=true".
This commit is contained in:
Antynea
2021-11-26 16:47:04 +01:00
committed by GitHub
parent ee3c366fa4
commit b2a3a2343c
1 changed files with 8 additions and 0 deletions
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8
41_snapshots-btrfs
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@@ -162,8 +162,16 @@ echo "$@" >> "$grub_directory/grub-btrfs.new"
}
## menu entries
old_kernel_parameters=${kernel_parameters}
make_menu_entries()
{
kernel_parameters="${old_kernel_parameters}"
if [[ "${GRUB_BTRFS_SYSTEMD_VOLATILE}" == true ]] ; then
if [[ $(strings -n7 "$grub_btrfs_mount_point/$snap_dir_name_trim/usr/bin/init" | grep -aEiom1 'upstart|systemd|sysvinit') == systemd ]] \
|| [[ $(strings -n7 "$grub_btrfs_mount_point/$snap_dir_name_trim/sbin/init" | grep -aEiom1 'upstart|systemd|sysvinit') == systemd ]]; then
[[ $(btrfs property get "$grub_btrfs_mount_point/$snap_dir_name_trim" ro) != "ro=false" ]] && kernel_parameters="${kernel_parameters} systemd.volatile=state";
fi
fi
## \" required for snap,kernels,init,microcode with space in their name
entry "submenu '${title_menu}' {
submenu '${title_submenu}' { echo }"