54 lines
2.0 KiB
Bash
Executable File
54 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# Create a fresh test disk image that mimics the XPS 17 layout:
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# p1: 150 MiB EFI vfat (with a fake EFI/Microsoft/* tree)
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# p2: 128 MiB MSR
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# p3: 4 GiB NTFS placeholder ("Windows", must NOT be touched)
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# p5: rest btrfs "Mint" (will be wiped by installer)
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#
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# No root required: uses sgdisk on the raw file + mtools for FAT32.
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# The installer reformats p5; p3 carries only a partition-type flag (0700).
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#
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# Output: a sparse raw image (QEMU format=raw).
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set -Eeuo pipefail
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PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
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OUT="${1:-$PROJECT_DIR/out/test-disk.img}"
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SIZE="${SIZE:-32G}"
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mkdir -p "$(dirname "$OUT")"
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command -v sgdisk >/dev/null || { echo "sgdisk missing (gptfdisk)"; exit 1; }
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command -v mformat >/dev/null || { echo "mformat missing (mtools)"; exit 1; }
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command -v mmd >/dev/null || { echo "mmd missing (mtools)"; exit 1; }
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command -v mcopy >/dev/null || { echo "mcopy missing (mtools)"; exit 1; }
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echo ">>> creating sparse raw disk ($SIZE) at $OUT"
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rm -f "$OUT"
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truncate -s "$SIZE" "$OUT"
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echo ">>> partitioning"
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sgdisk -Z "$OUT" >/dev/null 2>&1 || true
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sgdisk \
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-n 1:2048:+150M -t 1:ef00 -c 1:"EFI system partition" \
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-n 2:0:+128M -t 2:0c01 -c 2:"Microsoft reserved partition" \
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-n 3:0:+4G -t 3:0700 -c 3:"Basic data partition" \
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-n 5:0:0 -t 5:8300 -c 5:"Mint" \
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"$OUT" >/dev/null
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# Derive partition-1 byte offset + sector count from GPT metadata.
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P1_START=$(sgdisk -i 1 "$OUT" | awk '/First sector:/ {print $3}')
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P1_LAST=$(sgdisk -i 1 "$OUT" | awk '/Last sector:/ {print $3}')
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P1_SECTORS=$(( P1_LAST - P1_START + 1 ))
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P1_OFFSET=$(( P1_START * 512 ))
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echo ">>> formatting EFI partition 1 (FAT32) at byte offset $P1_OFFSET"
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mformat -i "$OUT@@$P1_OFFSET" -F -T "$P1_SECTORS" -v ESP ::
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echo ">>> faking Windows EFI loader on p1"
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mmd -i "$OUT@@$P1_OFFSET" ::/EFI ::/EFI/Microsoft ::/EFI/Microsoft/Boot
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printf 'FAKE WINDOWS BOOTMGR\n' \
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| mcopy -i "$OUT@@$P1_OFFSET" - ::/EFI/Microsoft/Boot/bootmgfw.efi
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echo ">>> done: $OUT"
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