Elaina Claus
9a6fea658d
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Daily Build and trunk tester / debian_update (push) Successful in 51s
171 lines
5.7 KiB
Bash
Executable File
171 lines
5.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# Copyright (C) 2025 Elaina Claus
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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if [ $(id -u) = 0 ]; then
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echo "Script should not be run as root, it could break something!" >&2
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fi
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# paths to bootcode
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mbr_file=build/mbr.bin
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vbr_file=build/vbr.bin
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stage2_file=build/stage2.bin
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boottest_file=build/BOOTi686.bin
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# Disk creation options
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disk_img=build/disk.img
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disk_img_final=build/output/disk.img.gz
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part_img=build/part.img
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part_img_final=build/output/part.img.gz
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artifacts_archive=build/output/artifacts.tar.gz
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# $disk_sector_size * $disk_size = total bytes, default is 256MiB
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disk_sectors=(524288 * 2)
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disk_sector_size=512
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part_start=2048
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part_sectors=$((disk_sectors - part_start))
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#
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# Build sanity section
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#
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echo "*** Performing pre-build sanity checks ***"
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# Tools needed:
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# sfdisk dosfstools (mkfs.fat), mtools (mcopy,mmd), gzip, dd, truncate, awk
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for t in mcopy mmd gzip dd truncate awk; do
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command -v "$t" >/dev/null || { echo "Missing tool: $t" >&2; exit 1; }
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done
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# these are normally in the sbin paths so I've had issues detecting them with command -v
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SF=$(command -v sfdisk || echo /usr/sbin/sfdisk)
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MKFS=$(command -v mkfs.fat || echo /usr/sbin/mkfs.fat)
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[[ -x "$SF" ]] || { echo "sfdisk not found"; exit 1; }
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[[ -x "$MKFS" ]] || { echo "mkfs.fat not found"; exit 1; }
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# check that required build files exist
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for f in "$mbr_file" "$vbr_file" "$stage2_file" "$boottest_file"; do
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[[ -f "$f" ]] || { echo "missing $f" >&2; exit 1; }
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done
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cat > /tmp/pt.sfdisk <<EOF
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label: dos
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unit: sectors
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sector-size: $disk_sector_size
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label-id: 0xa0b0c0d0
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start=$part_start, size=$((disk_sectors - part_start)), type=c, bootable
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EOF
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mtool_src=/tmp/mtools.conf
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cat > $mtool_src <<EOF
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drive c: file="$part_img"
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EOF
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#
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# Create disk images
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#
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echo "[1/7] Create disk.img and part.img"
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if ! [ -e "$disk_img" ]; then
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# create raw disk image
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if ! truncate -s $((disk_sectors * disk_sector_size)) "$disk_img"; then
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echo "Failed creating blank disk image." >&2
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exit 1
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fi
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sync
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else
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echo "Removing old disk image..."
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rm -rfv "$disk_img"
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if ! truncate -s $((disk_sectors * disk_sector_size)) "$disk_img"; then
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echo "Failed creating blank disk image." >&2
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exit 1
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fi
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sync
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fi
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if ! [ -e "$part_img" ]; then
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# create raw partition disk image
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if ! truncate -s $((part_sectors * disk_sector_size)) "$part_img"; then
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echo "Failed creating blank partition image." >&2
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exit 1
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fi
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sync
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else
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echo "Removing old (partition) disk image..."
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rm -rfv "$part_img"
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if ! truncate -s $((part_sectors * disk_sector_size)) "$part_img"; then
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echo "Failed creating blank partition image." >&2
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exit 1
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fi
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sync
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fi
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if [[ "$OSTYPE" == "linux-gnu"* ]]; then
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echo "[2/7] Write DOS partition table (single FAT32 LBA @ 2048)"
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"$SF" --no-reread "$disk_img" < /tmp/pt.sfdisk
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# BUG: the default disk img is 256MiB which mkfs.fat wants to create
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# a FAT16 FS by default. it needs to be at least 2GiB to to 'lock out'
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# FAT16 as an option. Force FAT32 here, might(?) break some things.
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echo "[3/7] Make FAT filesystem in partition image"
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"$MKFS" -F32 -v -n 'STEVIAFS' "$part_img"
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echo "[4/7] Patch VBR inside partition image (preserve BPB)"
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# copy jmp short entry; nop
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dd if=$vbr_file of="$part_img" bs=1 count=3 conv=notrunc
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# copy bootcode
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dd if=$vbr_file of="$part_img" bs=1 seek=90 skip=90 count=420 conv=notrunc
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# copy signature (should be 0xAA55)
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dd if=$vbr_file of="$part_img" bs=1 seek=510 skip=510 count=2 conv=notrunc
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# copy backup VBR within the created partition image
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# Linux dosfstools will complain (read: not work) unless this is done it seems
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# HACK: sector 6 is the **default** location of the BPB_BkBootSec, it **can** be different.
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dd if="$part_img" of="$part_img" bs=$disk_sector_size count=1 seek=6 conv=notrunc
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echo "[5/7] Copy boot payload to FAT32 filesystem using mtools as BOOT.BIN"
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MTOOLSRC="$mtool_src" mcopy "$boottest_file" C:BOOT.BIN
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MTOOLSRC="$mtool_src" mdir C:
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echo "[6/7] Patch MBR and install stage2 loader to disk image"
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# patch MBR+signature while preserving partition table
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dd if="$mbr_file" of="$disk_img" bs=1 count=440 conv=notrunc
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dd if="$mbr_file" of="$disk_img" bs=1 seek=510 skip=510 count=2 conv=notrunc
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# copy stage2 to absolute LBA 1
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dd if="$stage2_file" of="$disk_img" bs=$disk_sector_size seek=1 conv=notrunc
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echo "[7/7] Assembling final disk image"
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# place partition at it's place in the disk image
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dd if="$part_img" of="$disk_img" bs=$disk_sector_size seek=$part_start conv=notrunc
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echo " *** Outputing disk images will be in ./build/output/* *** "
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gzip -9c "$disk_img" > "$disk_img_final"
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gzip -9c "$part_img" > "$part_img_final"
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tar caf "$artifacts_archive" build/*.bin build/*.map
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else
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# Unknown.
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echo "Unknown OS type! Supported build hosts systems are GNU/Linux (& WSL)"
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exit 1
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fi |