39 lines
844 B
Bash
39 lines
844 B
Bash
# shellcheck shell=bash
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delete_subvolume_recursively() {
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IFS=$'\n'
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for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
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delete_subvolume_recursively "/mnt/btrfs/${i}"
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done
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btrfs subvolume delete "$1"
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}
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mkdir -p /mnt/btrfs
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mount "$DEVICE" /mnt/btrfs
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if [[ -e /mnt/btrfs/@ ]]; then
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mkdir -p /mnt/btrfs/@.bak
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timestamp=$(date --date="@$(stat -c %Y /mnt/btrfs/@)" "+%Y%m%dT%H%M")
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base="@.$timestamp"
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target="/mnt/btrfs/@.bak/$base"
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if [[ -e "$target" ]]; then
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i=1
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while [[ -e "/mnt/btrfs/@.bak/${base}_$i" ]]; do
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(( i++ ))
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done
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target="/mnt/btrfs/@.bak/${base}_$i"
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fi
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mv /mnt/btrfs/@ "$target"
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fi
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find /mnt/btrfs/@.bak/ -maxdepth 1 -mtime +7 | while IFS= read -r i; do
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delete_subvolume_recursively "$i"
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done
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btrfs subvolume create /mnt/btrfs/@
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umount /mnt/btrfs
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rmdir /mnt/btrfs
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