36d0c5b9d1
- init.sh: creates the @ / @home / @log / @snapshots subvolume layout on a target device (the installer step). - snapshot.sh: scheduled read-only snapshots with pruning, installed as /usr/local/sbin/arcline-snapshot. - rollback.sh: safe boot-to-snapshot rollback that refuses to touch the live @ and promotes a snapshot atomically.
67 lines
2.4 KiB
Bash
Executable File
67 lines
2.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# ─────────────────────────────────────────────────────────────────────────────
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# Arcline OS — btrfs subvolume layout initialiser
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#
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# btrfs/init.sh <device> (e.g. /dev/sda2)
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# btrfs/init.sh --list <device>
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#
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# Creates the Arcline subvolume layout on a fresh (or existing) btrfs device:
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#
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# @ → / system root (rolled back on failure)
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# @home → /home user data
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# @log → /var/log logs (not rolled back, survives)
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# @snapshots → /.snapshots where arcline-snapshot keeps snapshots
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#
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# This is the step the installer runs; it is safe to re-run (existing
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# subvolumes are kept, missing ones are created). Requires root.
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# ─────────────────────────────────────────────────────────────────────────────
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set -euo pipefail
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DEV="${1:?usage: btrfs/init.sh <device>}"
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TOP="/run/arcline-btrfs-init"
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require_root() {
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if [[ $EUID -ne 0 ]] && command -v sudo >/dev/null; then
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exec sudo -E "$0" "$@"
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elif [[ $EUID -ne 0 ]]; then
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echo "error: needs root" >&2; exit 1
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fi
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}
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require_root "$0" "$@"
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command -v btrfs >/dev/null || { echo "error: btrfs-progs not installed" >&2; exit 1; }
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if ! blkid -p -O "$DEV" | grep -q btrfs 2>/dev/null; then
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echo "error: $DEV is not a btrfs filesystem" >&2
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exit 1
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fi
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mkdir -p "$TOP"
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mount -o subvolid=5 "$DEV" "$TOP"
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trap 'umount "$TOP" 2>/dev/null || true; rmdir "$TOP" 2>/dev/null || true' EXIT
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create_subvol() {
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local name="$1"
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if [[ -d "$TOP/$name" ]]; then
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echo " keeping existing subvolume: $name"
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else
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echo " creating subvolume: $name"
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btrfs subvolume create "$TOP/$name" >/dev/null
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fi
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}
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echo "Arcline btrfs layout on $DEV:"
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create_subvol "@"
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create_subvol "@home"
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create_subvol "@log"
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create_subvol "@snapshots"
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# mark @snapshots read-only friendly (snapper/arcline-snapshot manage it)
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btrfs property set -ts "$TOP/@snapshots" ro false 2>/dev/null || true
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echo "done. The installer mounts:"
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echo " @ → /"
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echo " @home → /home"
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echo " @log → /var/log"
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echo " @snapshots → /.snapshots"
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