unbrot
f69b423b30
Before partitioning, check_repo_url() downloads system_setup/install.sh from REPO_URL and compares its sha256sum against the running script. Warns and asks to continue if the URL is unreachable or the checksums differ. Also accept an optional first argument to override REPO_URL. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
505 lines
20 KiB
Bash
Executable File
505 lines
20 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-FileCopyrightText: Daniel Pätzold
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# Bootstrap script: creates an OEMDRV partition by shrinking an existing
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# ext4 or btrfs partition by 4 GiB, formats the freed space as BTRFS with
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# label OEMDRV, mounts it to /opt/sys_config and clones the repository.
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#
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# Run as root on a target machine before any Kickstart installation.
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[[ "$EUID" -eq 0 ]] || { echo "ERROR: This script must be run as root." >&2; exit 1; }
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SHRINK_MIB=4096
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OEMDRV_LABEL="OEMDRV"
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MOUNT_POINT="/opt/sys_config"
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MOUNT_OPTS="compress=zstd:6"
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REPO_URL="${1:-https://gitea.dtext.online/obel1x/fedora-OEMDRV.git}"
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MIN_FREE_MIB=$(( SHRINK_MIB + 512 )) # require 512 MiB headroom above the shrink size
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# ── Helpers ───────────────────────────────────────────────────────────────────
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die() { echo; echo "ERROR: $*" >&2; exit 1; }
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info() { echo; echo ">>> $*"; }
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hr() { printf '%.0s─' {1..100}; echo; }
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require_root() {
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[[ "$EUID" -eq 0 ]] || die "This script must be run as root."
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}
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check_tools() {
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local missing=()
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for tool in lsblk blkid parted partprobe mkfs.btrfs git e2fsck resize2fs tune2fs; do
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command -v "$tool" >/dev/null 2>&1 || missing+=("$tool")
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done
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[[ ${#missing[@]} -eq 0 ]] || die "Missing required tools: ${missing[*]}"
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}
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# Returns 0 if the remote install.sh matches this script's checksum,
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# 1 if the URL is unreachable or the file cannot be downloaded,
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# 2 if the checksum does not match.
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check_repo_url() {
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local tmpdir sum_remote sum_local
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tmpdir=$(mktemp -d /tmp/oemdrv_repocheck.XXXXXX)
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if ! curl -fsSL "${REPO_URL%.git}/raw/branch/main/system_setup/install.sh" \
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-o "$tmpdir/install.sh" 2>/dev/null; then
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rm -rf "$tmpdir"
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return 1
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fi
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sum_remote=$(sha256sum "$tmpdir/install.sh" | awk '{print $1}')
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sum_local=$(sha256sum "$0" | awk '{print $1}')
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rm -rf "$tmpdir"
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[[ "$sum_remote" == "$sum_local" ]] || return 2
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return 0
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}
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# ── Free-space helpers ────────────────────────────────────────────────────────
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# Free MiB for a mounted device via df
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mounted_free_mib() {
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df --output=avail -BM "$1" 2>/dev/null | awk 'NR==2{gsub("M",""); print $1+0}'
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}
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# Free MiB for an unmounted ext4 device via tune2fs (no mount needed)
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ext4_free_mib() {
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local dev="$1" fb bs
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fb=$(tune2fs -l "$dev" 2>/dev/null | awk '/^Free blocks:/{print $3}')
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bs=$(tune2fs -l "$dev" 2>/dev/null | awk '/^Block size:/{print $3}')
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[[ -n "$fb" && -n "$bs" ]] || { echo 0; return; }
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echo $(( fb * bs / 1048576 ))
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}
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# Free MiB for a btrfs device – mounts temporarily if not already mounted
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btrfs_free_mib() {
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local dev="$1" mnt free tmp=0
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mnt=$(lsblk -n -o MOUNTPOINT "$dev" 2>/dev/null | grep -v '^$' | head -1)
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if [[ -z "$mnt" ]]; then
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mnt=$(mktemp -d /tmp/oemdrv_check.XXXXXX)
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mount -o ro "$dev" "$mnt" 2>/dev/null && tmp=1 || { rmdir "$mnt"; echo 0; return; }
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fi
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free=$(mounted_free_mib "$mnt")
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[[ $tmp -eq 1 ]] && { umount "$mnt"; rmdir "$mnt"; }
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echo "${free:-0}"
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}
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# ── Partition discovery ───────────────────────────────────────────────────────
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# Parallel arrays, indexed 0..PT_IDX-1
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PT_IDX=0
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PT_DEV=() # /dev/sda2
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PT_DISK=() # /dev/sda
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PT_PNUM=() # 2
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PT_SIZE=() # "100G"
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PT_FS=() # ext4 | btrfs
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PT_LABEL=() # home | -
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PT_UUID=() # xxxxxxxx | -
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PT_MNT=() # /home | -
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PT_FREE=() # free MiB (integer)
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PT_OK=() # 1 = shrinkable
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# Parallel arrays for unpartitioned free space regions, indexed 0..FS_IDX-1
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FS_IDX=0
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FS_DISK=() # /dev/sda
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FS_START=() # region start, MiB
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FS_END=() # region end, MiB
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FS_SIZE=() # region size, MiB
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collect_partitions() {
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local NAME SIZE FSTYPE LABEL UUID MOUNTPOINT TYPE PKNAME
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while IFS= read -r line; do
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NAME="" SIZE="" FSTYPE="" LABEL="" UUID="" MOUNTPOINT="" TYPE="" PKNAME=""
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eval "$line"
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[[ "$TYPE" != "part" ]] && continue
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[[ "$FSTYPE" != "ext4" && "$FSTYPE" != "btrfs" ]] && continue
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[[ "$LABEL" == "$OEMDRV_LABEL" ]] && continue
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[[ -z "$PKNAME" ]] && continue
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local disk="/dev/${PKNAME##*/}"
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local pnum
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pnum=$(cat /sys/class/block/"${NAME##/dev/}"/partition 2>/dev/null) || continue
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# Free space check
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local free_mib
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if [[ -n "$MOUNTPOINT" ]]; then
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free_mib=$(mounted_free_mib "$NAME")
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elif [[ "$FSTYPE" == "ext4" ]]; then
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free_mib=$(ext4_free_mib "$NAME")
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else
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free_mib=$(btrfs_free_mib "$NAME")
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fi
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free_mib=${free_mib:-0}
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# Shrinkable: not /, enough free space
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local ok=0
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[[ "$MOUNTPOINT" != "/" && "$free_mib" -ge "$MIN_FREE_MIB" ]] && ok=1
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PT_DEV[$PT_IDX]="$NAME"
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PT_DISK[$PT_IDX]="$disk"
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PT_PNUM[$PT_IDX]="$pnum"
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PT_SIZE[$PT_IDX]="$SIZE"
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PT_FS[$PT_IDX]="$FSTYPE"
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PT_LABEL[$PT_IDX]="${LABEL:--}"
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PT_UUID[$PT_IDX]="${UUID:--}"
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PT_MNT[$PT_IDX]="${MOUNTPOINT:--}"
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PT_FREE[$PT_IDX]="$free_mib"
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PT_OK[$PT_IDX]="$ok"
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(( PT_IDX++ )) || true
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done < <(lsblk -o NAME,SIZE,FSTYPE,LABEL,UUID,MOUNTPOINT,TYPE,PKNAME -p -P -n 2>/dev/null)
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}
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collect_free_space() {
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local disk
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while IFS= read -r disk; do
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[[ -b "$disk" ]] || continue
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while read -r s e sz; do
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FS_DISK[$FS_IDX]="$disk"
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FS_START[$FS_IDX]="$s"
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FS_END[$FS_IDX]="$e"
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FS_SIZE[$FS_IDX]="$sz"
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(( FS_IDX++ )) || true
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done < <(
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parted -s "$disk" -m unit MiB print free 2>/dev/null \
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| awk -F'[;:]' -v min="$SHRINK_MIB" '
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$1+0 > 0 {
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for (i = 1; i <= NF; i++) {
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if ($i == "free") {
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start=$2; end=$3; size=$4;
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gsub(/MiB/,"",start); gsub(/MiB/,"",end); gsub(/MiB/,"",size);
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s=int(start+0); e=int(end+0); sz=int(size+0);
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if (sz >= min) print s " " e " " sz;
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break
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}
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}
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}'
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)
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done < <(lsblk -d -p -n -o NAME 2>/dev/null)
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}
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# ── Table display ─────────────────────────────────────────────────────────────
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show_table() {
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hr
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printf " %-4s %-14s %-6s %-8s %-10s %-6s %-18s %-36s %s\n" \
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"#" "Device" "Disk" "Size" "Free (MiB)" "FS" "Label" "UUID" "Mountpoint"
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hr
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local i mark note
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for (( i=0; i<PT_IDX; i++ )); do
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mark=" "
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note=""
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if [[ "${PT_OK[$i]}" == "1" ]]; then
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mark="* "
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elif [[ "${PT_MNT[$i]}" == "/" ]]; then
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note=" (root — skip)"
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else
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note=" (not enough free space)"
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fi
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printf "%s%-4s %-14s %-6s %-8s %-10s %-6s %-18s %-36s %s%s\n" \
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"$mark" \
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"$((i+1))" \
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"${PT_DEV[$i]}" \
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"${PT_DISK[$i]##/dev/}" \
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"${PT_SIZE[$i]}" \
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"${PT_FREE[$i]}" \
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"${PT_FS[$i]}" \
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"${PT_LABEL[$i]}" \
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"${PT_UUID[$i]}" \
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"${PT_MNT[$i]}" \
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"$note"
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done
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hr
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printf " * = shrinkable: will be reduced by %s MiB to create OEMDRV\n" "$SHRINK_MIB"
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echo
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}
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show_free_table() {
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[[ $FS_IDX -gt 0 ]] || return
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echo
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echo "Unpartitioned free space regions (>= ${SHRINK_MIB} MiB):"
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hr
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printf " %-4s %-14s %-12s %-12s %s\n" "#" "Disk" "Start (MiB)" "End (MiB)" "Size (MiB)"
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hr
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for (( i=0; i<FS_IDX; i++ )); do
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printf " %-4s %-14s %-12s %-12s %s\n" \
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"$((i+1))" \
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"${FS_DISK[$i]}" \
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"${FS_START[$i]}" \
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"${FS_END[$i]}" \
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"${FS_SIZE[$i]}"
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done
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hr
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echo
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}
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# ── Partition geometry via parted -m ─────────────────────────────────────────
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part_end_mib() {
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parted -s "$1" -m unit MiB print 2>/dev/null \
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| awk -F: -v p="$2" '$1==p{gsub("MiB","",$3); printf "%.0f\n",$3; exit}'
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}
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part_start_mib() {
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parted -s "$1" -m unit MiB print 2>/dev/null \
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| awk -F: -v p="$2" '$1==p{gsub("MiB","",$2); printf "%.0f\n",$2; exit}'
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}
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# Device name for a new partition on a given disk
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new_part_device() {
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local disk="$1" pnum="$2"
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if [[ "$disk" =~ (nvme|mmcblk) ]]; then
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echo "${disk}p${pnum}"
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else
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echo "${disk}${pnum}"
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fi
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}
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# ── Main ──────────────────────────────────────────────────────────────────────
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require_root
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check_tools
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info "Verifying repository URL..."
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check_repo_url
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case $? in
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1) echo
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echo "WARNING: '$REPO_URL' is not a reachable git repository."
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read -r -p " Continue anyway? [y/N]: " ans
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[[ "${ans,,}" == "y" ]] || { echo "Aborted."; exit 0; }
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;;
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2) echo
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echo "WARNING: The checksum of this script does not match 'system_setup/install.sh'"
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echo " at '$REPO_URL'."
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echo " You may be running an outdated or modified version of install.sh."
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read -r -p " Continue anyway? [y/N]: " ans
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[[ "${ans,,}" == "y" ]] || { echo "Aborted."; exit 0; }
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;;
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esac
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info "Scanning for shrinkable partitions and unpartitioned free space..."
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collect_partitions
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collect_free_space
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[[ $PT_IDX -gt 0 || $FS_IDX -gt 0 ]] \
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|| die "No ext4 or btrfs partitions and no free disk space found on this system."
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# Count shrinkable partitions
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shrink_count=0
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for (( i=0; i<PT_IDX; i++ )); do [[ "${PT_OK[$i]}" == "1" ]] && (( shrink_count++ )) || true; done
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[[ $PT_IDX -gt 0 ]] && show_table
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show_free_table
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[[ $shrink_count -gt 0 || $FS_IDX -gt 0 ]] \
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|| die "No shrinkable partitions and no free space found. A non-root ext4 or btrfs partition needs at least ${MIN_FREE_MIB} MiB free."
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# ── Selection ─────────────────────────────────────────────────────────────────
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MODE="" # "freespace" | "shrink"
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SEL=-1
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while true; do
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echo
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if [[ $FS_IDX -gt 0 && $shrink_count -gt 0 ]]; then
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read -r -p "Enter f<n> to use free space, s<n> to shrink a partition, or q to quit: " INPUT
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elif [[ $FS_IDX -gt 0 ]]; then
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read -r -p "Enter number of free space region to use, or q to quit: " INPUT
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[[ "$INPUT" =~ ^[0-9]+$ ]] && INPUT="f${INPUT}"
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else
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read -r -p "Enter number of partition to shrink, or q to quit: " INPUT
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[[ "$INPUT" =~ ^[0-9]+$ ]] && INPUT="s${INPUT}"
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fi
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[[ "$INPUT" =~ ^[qQ]$ ]] && { echo "Aborted."; exit 0; }
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if [[ "$INPUT" =~ ^[fF]([0-9]+)$ ]]; then
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local_i=$(( ${BASH_REMATCH[1]} - 1 ))
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(( local_i >= 0 && local_i < FS_IDX )) || { echo " Number out of range."; continue; }
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MODE="freespace"; SEL=$local_i; break
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elif [[ "$INPUT" =~ ^[sS]([0-9]+)$ ]]; then
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local_i=$(( ${BASH_REMATCH[1]} - 1 ))
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(( local_i >= 0 && local_i < PT_IDX )) || { echo " Number out of range."; continue; }
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[[ "${PT_OK[$local_i]}" == "1" ]] || { echo " That partition cannot be shrunk (see marks above)."; continue; }
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MODE="shrink"; SEL=$local_i; break
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else
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echo " Invalid input."
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fi
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done
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# ── Confirm ───────────────────────────────────────────────────────────────────
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echo
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if [[ "$MODE" == "freespace" ]]; then
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WORK_DISK="${FS_DISK[$SEL]}"
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OEMDRV_START="${FS_START[$SEL]}"
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OEMDRV_END=$(( FS_START[$SEL] + SHRINK_MIB ))
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echo " Disk : $WORK_DISK"
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echo " Free region : ${FS_START[$SEL]} MiB – ${FS_END[$SEL]} MiB (${FS_SIZE[$SEL]} MiB available)"
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echo " New OEMDRV : ${OEMDRV_START} MiB – ${OEMDRV_END} MiB (${SHRINK_MIB} MiB)"
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echo " It will be mounted at $MOUNT_POINT and the repository cloned into it."
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else
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S_DEV="${PT_DEV[$SEL]}"
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S_DISK="${PT_DISK[$SEL]}"
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S_PNUM="${PT_PNUM[$SEL]}"
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S_FS="${PT_FS[$SEL]}"
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S_MNT="${PT_MNT[$SEL]}"
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WORK_DISK="$S_DISK"
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echo " Partition : $S_DEV (${PT_FS[$SEL]}, ${PT_SIZE[$SEL]}, ${PT_FREE[$SEL]} MiB free)"
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echo " Disk : $S_DISK Partition number: $S_PNUM"
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echo " Mountpoint: $S_MNT"
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echo
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echo " $S_DEV will be shrunk by ${SHRINK_MIB} MiB."
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echo " A new ${SHRINK_MIB} MiB BTRFS partition labeled OEMDRV will be created."
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echo " It will be mounted at $MOUNT_POINT and the repository cloned into it."
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fi
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echo
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read -r -p " Type YES (uppercase) to confirm, anything else to abort: " CONFIRM
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[[ "$CONFIRM" == "YES" ]] || { echo "Aborted."; exit 0; }
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# ── Shrink path: geometry + filesystem resize + partition table update ─────────
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WAS_MOUNTED=0
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ORIG_MNT=""
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if [[ "$MODE" == "shrink" ]]; then
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info "Reading partition geometry on $S_DISK..."
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CURR_END=$(part_end_mib "$S_DISK" "$S_PNUM")
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CURR_START=$(part_start_mib "$S_DISK" "$S_PNUM")
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[[ -n "$CURR_END" && -n "$CURR_START" ]] \
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|| die "Could not read geometry for partition $S_PNUM on $S_DISK."
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NEW_END=$(( CURR_END - SHRINK_MIB ))
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NEW_FS_MIB=$(( NEW_END - CURR_START ))
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OEMDRV_START=$NEW_END
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OEMDRV_END=$CURR_END
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echo " Current partition : ${CURR_START} MiB – ${CURR_END} MiB"
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echo " After shrink : ${CURR_START} MiB – ${NEW_END} MiB (filesystem: ${NEW_FS_MIB} MiB)"
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echo " New OEMDRV : ${OEMDRV_START} MiB – ${OEMDRV_END} MiB (${SHRINK_MIB} MiB)"
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if [[ "$S_FS" == "ext4" ]]; then
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# ext4 requires offline resize — unmount first
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if [[ "$S_MNT" != "-" && -n "$S_MNT" ]]; then
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info "Unmounting $S_DEV from $S_MNT..."
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ORIG_MNT="$S_MNT"
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umount "$S_DEV" || die "Cannot unmount $S_DEV. Close all open files and try again."
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WAS_MOUNTED=1
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fi
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info "Running e2fsck on $S_DEV..."
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e2fsck -f "$S_DEV" || die "e2fsck found errors on $S_DEV. Fix them before retrying."
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info "Shrinking ext4 filesystem to ${NEW_FS_MIB} MiB..."
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resize2fs "$S_DEV" "${NEW_FS_MIB}M" || die "resize2fs failed."
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elif [[ "$S_FS" == "btrfs" ]]; then
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# btrfs supports online resize — use existing mount point if available,
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# otherwise mount temporarily
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info "Shrinking btrfs filesystem on $S_DEV to ${NEW_FS_MIB} MiB..."
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if [[ "$S_MNT" != "-" && -n "$S_MNT" ]]; then
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btrfs filesystem resize "${NEW_FS_MIB}m" "$S_MNT" \
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|| die "btrfs filesystem resize failed."
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else
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TMP_MNT=$(mktemp -d /tmp/oemdrv_btrfs.XXXXXX)
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mount "$S_DEV" "$TMP_MNT" || { rmdir "$TMP_MNT"; die "Cannot mount $S_DEV for btrfs resize."; }
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btrfs filesystem resize "${NEW_FS_MIB}m" "$TMP_MNT" \
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|| { umount "$TMP_MNT"; rmdir "$TMP_MNT"; die "btrfs filesystem resize failed."; }
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sync
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umount "$TMP_MNT" && rmdir "$TMP_MNT"
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fi
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fi
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info "Shrinking partition $S_PNUM to ${NEW_END} MiB in partition table..."
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SECTOR_SIZE=$(cat /sys/block/"${S_DISK##*/}"/queue/hw_sector_size 2>/dev/null || echo 512)
|
||
NEW_END_SEC=$(( NEW_END * 1048576 / SECTOR_SIZE ))
|
||
sfdisk -d "$S_DISK" | awk -v dev="$S_DEV" -v new_end="$NEW_END_SEC" '
|
||
$0 ~ "^" dev " : " {
|
||
match($0, /start= *([0-9]+)/, a)
|
||
sub(/size= *[0-9]+/, "size= " (new_end - a[1]+0))
|
||
}
|
||
{ print }
|
||
' | sfdisk --no-reread --force "$S_DISK" \
|
||
|| die "sfdisk partition resize failed."
|
||
fi
|
||
|
||
# ── Create OEMDRV partition ───────────────────────────────────────────────────
|
||
|
||
info "Creating new OEMDRV partition (${OEMDRV_START}–${OEMDRV_END} MiB) on $WORK_DISK..."
|
||
printf 'Yes\n' | parted "$WORK_DISK" mkpart anacondainstall btrfs "${OEMDRV_START}MiB" "${OEMDRV_END}MiB" \
|
||
|| die "parted mkpart failed. Check that the target area is free space on $WORK_DISK."
|
||
|
||
partprobe "$WORK_DISK"
|
||
sleep 1
|
||
|
||
# Determine new partition number (highest on the disk after partprobe)
|
||
NEW_PNUM=$(parted -s "$WORK_DISK" -m unit MiB print 2>/dev/null \
|
||
| awk -F: '/^[0-9]/{n=$1} END{print n}')
|
||
[[ -n "$NEW_PNUM" ]] || die "Could not determine new partition number on $WORK_DISK."
|
||
|
||
OEMDRV_DEV=$(new_part_device "$WORK_DISK" "$NEW_PNUM")
|
||
[[ -b "$OEMDRV_DEV" ]] || die "New partition device $OEMDRV_DEV not found after partprobe."
|
||
|
||
info "New partition device: $OEMDRV_DEV"
|
||
|
||
# ── Format ────────────────────────────────────────────────────────────────────
|
||
|
||
info "Formatting $OEMDRV_DEV as BTRFS (label: $OEMDRV_LABEL)..."
|
||
mkfs.btrfs -f -L "$OEMDRV_LABEL" "$OEMDRV_DEV" || die "mkfs.btrfs failed."
|
||
|
||
# ── Remount original partition (shrink path only) ─────────────────────────────
|
||
|
||
if [[ $WAS_MOUNTED -eq 1 && -n "$ORIG_MNT" ]]; then
|
||
info "Remounting $S_DEV to $ORIG_MNT..."
|
||
mount "$S_DEV" "$ORIG_MNT" \
|
||
|| echo "WARNING: Could not remount $S_DEV to $ORIG_MNT — remount manually."
|
||
fi
|
||
|
||
# ── Mount OEMDRV ──────────────────────────────────────────────────────────────
|
||
|
||
info "Mounting $OEMDRV_DEV to $MOUNT_POINT (options: $MOUNT_OPTS)..."
|
||
[[ -d "$MOUNT_POINT" ]] || mkdir -p "$MOUNT_POINT"
|
||
mount -o "$MOUNT_OPTS" "$OEMDRV_DEV" "$MOUNT_POINT" || die "mount failed."
|
||
|
||
# ── Clone repository ──────────────────────────────────────────────────────────
|
||
|
||
info "Cloning $REPO_URL into $MOUNT_POINT..."
|
||
cd "$MOUNT_POINT" || die "Cannot cd to $MOUNT_POINT."
|
||
git clone --progress --depth 1 "$REPO_URL" . || die "git clone failed."
|
||
|
||
# ── Done ──────────────────────────────────────────────────────────────────────
|
||
|
||
info "Done."
|
||
echo
|
||
echo " OEMDRV device : $OEMDRV_DEV"
|
||
echo " Mounted at : $MOUNT_POINT"
|
||
echo
|
||
|
||
# ── Optionally run configure.sh ───────────────────────────────────────────────
|
||
|
||
CONF_SCRIPT="$MOUNT_POINT/system_setup/configure.sh"
|
||
|
||
echo
|
||
read -r -p "Run configure.sh now to set up your environment? [y/N]: " RUN_CONF
|
||
if [[ "${RUN_CONF,,}" == "y" ]]; then
|
||
if [[ -n "$SUDO_USER" ]]; then
|
||
info "Running configure.sh as user '$SUDO_USER'..."
|
||
su - "$SUDO_USER" -c "bash '$CONF_SCRIPT'"
|
||
else
|
||
echo
|
||
echo "configure.sh must be run as a non-root user. Please run:"
|
||
echo " bash $CONF_SCRIPT"
|
||
fi
|
||
else
|
||
echo
|
||
echo "Next steps:"
|
||
echo " 1. Run: bash $CONF_SCRIPT"
|
||
echo " 2. Boot the Kickstart installer — it will detect the OEMDRV partition automatically."
|
||
echo
|
||
fi
|