13 lines
495 B
Bash
Executable File
13 lines
495 B
Bash
Executable File
#!/bin/bash
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function mount_snapshot_overlay() {
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local root_mnt="$NEWROOT"
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if [[ "$(findmnt --mountpoint "$root_mnt" -o FSTYPE -n)" = "btrfs" ]] && [[ "$(btrfs property get ${root_mnt} ro)" != "ro=false" ]]; then
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local ram_dir=$(mktemp -d -p /)
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mount -t tmpfs cowspace ${ram_dir}
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mkdir -p ${ram_dir}/{upper,work}
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mount -t overlay -o lowerdir=${root_mnt},upperdir=${ram_dir}/upper,workdir=${ram_dir}/work rootfs ${root_mnt}
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fi
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}
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mount_snapshot_overlay
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