Installer implemented in the live CD! However we still need to add some old realtek network card support for r1
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4 changed files with 497 additions and 4 deletions
212
board/mentalnet/overlay/usr/sbin/mentalnet-install
Executable file
212
board/mentalnet/overlay/usr/sbin/mentalnet-install
Executable file
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#!/bin/sh
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#
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# mentalnet-install - install Mentalnet GNU/Linux from the live CD onto a hard disk
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#
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# Run as root on the live system: mentalnet-install
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#
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# The installed system boots from its own MBR (GRUB) with the root
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# filesystem on a single ext4 partition (plus optional swap).
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set -u
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MIN_DISK_SECTORS=819200 # 400 MiB minimum target disk
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BOOT_START_SECTORS=2048 # first sector of root: leaves the MBR gap
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# free for the GRUB core.img embedding
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MNT=/mnt/hd
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msg() { printf '%s\n' "$*"; }
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warn() { printf 'WARNING: %s\n' "$*"; }
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die() { printf 'ERROR: %s\n' "$*" >&2; exit 1; }
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# make sure a failed run never leaves the target disk mounted
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cleanup() {
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grep -q " $MNT " /proc/mounts 2>/dev/null && umount "$MNT" 2>/dev/null
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[ -n "${TMNT:-}" ] && umount /mnt 2>/dev/null
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return 0
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}
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trap cleanup EXIT
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[ "$(id -u)" -eq 0 ] || die "please run as root"
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for t in fdisk mkfs.ext4 mkswap grub-install; do
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command -v "$t" >/dev/null 2>&1 || die "required tool '$t' not found"
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done
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banner() {
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clear 2>/dev/null
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msg ""
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msg " ============================================================"
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msg " Mentalnet GNU/Linux - hard disk installer"
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msg " ============================================================"
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msg ""
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msg " This will copy the live system from the CD onto a local"
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msg " disk, install the GRUB bootloader, and make the disk"
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msg " bootable on its own."
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msg ""
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}
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list_disks() {
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for d in /sys/block/*; do
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dev=${d##*/}
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case "$dev" in
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sr*|loop*|ram*|zram*|md*|dm-*|fd*|nbd*) continue ;;
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esac
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size=$(cat "$d/size" 2>/dev/null) || continue
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mib=$((size / 2048))
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model=$(cat "$d/device/model" 2>/dev/null | tr -d ' ')
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printf ' /dev/%-6s %6s MiB %s\n' "$dev" "$mib" "${model:-}"
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done
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}
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banner
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msg " Detected disks:"
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list_disks
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msg ""
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printf ' Disk to install to (e.g. sda): '
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read -r DISK
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[ -n "${DISK:-}" ] || die "no disk given"
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case "$DISK" in
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sr*|loop*|ram*|zram*|md*|dm-*|fd*|nbd*) die "refusing to use $DISK" ;;
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*[!/a-z0-9]*) die "invalid disk name" ;;
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esac
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DEV="/dev/$DISK"
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SYS="/sys/block/$DISK"
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[ -d "$SYS" ] && [ -b "$DEV" ] || die "$DEV is not a block device"
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SIZE=$(cat "$SYS/size")
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[ "$SIZE" -ge "$MIN_DISK_SECTORS" ] \
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|| die "$DEV is too small (need $((MIN_DISK_SECTORS / 2048)) MiB minimum)"
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if grep -q "^$DEV" /proc/mounts; then
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die "$DEV (or a partition on it) is currently mounted"
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fi
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msg ""
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warn "ALL DATA on $DEV will be DESTROYED without further notice."
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printf ' Type YES to continue: '
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read -r ANSWER
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[ "${ANSWER:-}" = "YES" ] || { msg "Aborted."; exit 0; }
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# --- swap? ---------------------------------------------------------------
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printf ' Create a swap partition? [y/N]: '
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read -r SWAPANS
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SWAP=0
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case "${SWAPANS:-}" in
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y|Y|yes|Yes|YES) SWAP=1 ;;
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esac
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SWAP_SECTORS=0
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if [ "$SWAP" -eq 1 ]; then
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MEM_KB=$(awk '/^MemTotal:/{print $2}' /proc/meminfo)
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SWAP_MIB=$((MEM_KB / 1024 * 2))
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[ "$SWAP_MIB" -gt 512 ] && SWAP_MIB=512
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[ "$SWAP_MIB" -lt 32 ] && SWAP_MIB=32
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SWAP_SECTORS=$((SWAP_MIB * 2048))
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msg " Swap partition: ${SWAP_MIB} MiB"
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fi
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# --- partition -----------------------------------------------------------
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msg " Partitioning $DEV (MBR, root at sector $BOOT_START_SECTORS) ..."
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if [ "$SWAP" -eq 1 ]; then
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P1_END=$((SIZE - SWAP_SECTORS - 1))
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P2_START=$((SIZE - SWAP_SECTORS))
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printf 'o\nn\np\n1\n%d\n%d\nn\np\n2\n%d\n%d\nt\n2\n82\na\n1\nw\n' \
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"$BOOT_START_SECTORS" "$P1_END" \
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"$P2_START" "$((SIZE - 1))" \
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| fdisk -u "$DEV" >/dev/null || die "fdisk failed"
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else
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printf 'o\nn\np\n1\n%d\n%d\na\nw\n' \
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"$BOOT_START_SECTORS" "$((SIZE - 1))" \
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| fdisk -u "$DEV" >/dev/null || die "fdisk failed"
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fi
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ROOTPART="${DEV}1"
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i=0
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while [ ! -b "$ROOTPART" ] && [ "$i" -lt 10 ]; do
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i=$((i + 1))
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partprobe "$DEV" 2>/dev/null
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sleep 1
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done
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[ -b "$ROOTPART" ] || die "$ROOTPART did not appear after partitioning"
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# --- filesystems ---------------------------------------------------------
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msg " Creating ext4 filesystem on $ROOTPART ..."
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mkfs.ext4 -F -L rootfs "$ROOTPART" >/dev/null || die "mkfs.ext4 failed"
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if [ "$SWAP" -eq 1 ]; then
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msg " Creating swap on ${DEV}2 ..."
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mkswap "${DEV}2" >/dev/null || die "mkswap failed"
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fi
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# --- copy the live system ------------------------------------------------
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# /mnt lives on the read-only CD, so put a writable tmpfs over it to
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# get a usable mount point
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TMNT=
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if ! grep -q ' /mnt ' /proc/mounts; then
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mount -t tmpfs -o mode=0755 tmpfs /mnt || die "cannot set up /mnt"
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TMNT=1
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fi
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mkdir -p "$MNT"
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mount -t ext4 "$ROOTPART" "$MNT" || die "could not mount $ROOTPART"
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msg " Copying the system (this takes a while) ..."
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# NOTE: one single tar invocation per side. busybox tar stops reading at
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# the first end-of-archive marker, so piping several archives through
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# '-' would silently transfer only the first directory.
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DIRS=
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for d in bin boot etc home lib lib32 lib64 media opt root sbin srv usr var; do
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[ -e "/$d" ] && DIRS="$DIRS $d"
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done
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(cd / && tar -cf - $DIRS) | (cd "$MNT" && tar -xpf -) \
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|| die "copying failed"
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# mount points that live in tmpfs on the CD
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mkdir -p "$MNT/proc" "$MNT/sys" "$MNT/dev" "$MNT/tmp" "$MNT/run" "$MNT/mnt"
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# CD-only artifacts must not end up on the disk
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rm -f "$MNT/boot/grub/grub-eltorito.img"
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# --- /etc/fstab ----------------------------------------------------------
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msg " Writing /etc/fstab ..."
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cat > "$MNT/etc/fstab" <<EOF
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# /etc/fstab - generated by mentalnet-install
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$ROOTPART / ext4 rw,noatime 0 1
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proc /proc proc defaults 0 0
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devpts /dev/pts devpts defaults,gid=5,mode=620,ptmxmode=0666 0 0
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tmpfs /dev/shm tmpfs mode=1777 0 0
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tmpfs /tmp tmpfs mode=1777 0 0
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tmpfs /run tmpfs mode=0755,nosuid,nodev 0 0
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sysfs /sys sysfs defaults 0 0
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EOF
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if [ "$SWAP" -eq 1 ]; then
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printf '%s none swap sw 0 0\n' "${DEV}2" >> "$MNT/etc/fstab"
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fi
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# --- bootloader ----------------------------------------------------------
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msg " Writing bootloader configuration ..."
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sed "s|@ROOTDEV@|$ROOTPART|" /usr/share/mentalnet/grub-disk.cfg \
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> "$MNT/boot/grub/grub.cfg" \
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|| die "could not write grub.cfg"
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msg " Installing GRUB to the MBR of $DEV ..."
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grub-install --boot-directory="$MNT/boot" "$DEV" >/dev/null 2>&1 \
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|| die "grub-install failed"
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sync
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umount "$MNT" || umount -f "$MNT" || die "could not unmount $MNT"
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[ -n "$TMNT" ] && umount /mnt
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msg ""
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msg " ============================================================"
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msg " Installation complete!"
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msg " ============================================================"
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msg ""
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msg " Root partition : $ROOTPART (ext4)"
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[ "$SWAP" -eq 1 ] && msg " Swap : ${DEV}2 (${SWAP_MIB} MiB)"
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msg " Login : root / mnlinux"
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msg ""
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msg " Remove the CD and reboot: poweroff"
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msg ""
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@ -0,0 +1,6 @@
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set default="0"
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set timeout="5"
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menuentry "Mentalnet GNU/Linux" {
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linux /boot/bzImage root=@ROOTDEV@ rootwait rw console=ttyS0,9600n8 console=tty0
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}
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