setup-disk.in 7.09 KB
Newer Older
Natanael Copa's avatar
Natanael Copa committed
1 2 3 4 5
#!/bin/sh

PREFIX=
. "$PREFIX/lib/libalpine.sh"

6
MBR=${MBR:-"/usr/share/syslinux/mbr.bin"}
Natanael Copa's avatar
Natanael Copa committed
7 8 9 10 11 12 13 14 15 16 17

in_list() {
	local i="$1"
	shift
	while [ $# -gt 0 ]; do
		[ "$i" = "$1" ] && return 0
		shift
	done
	return 1
}

18
enumerate_fstab() {
19 20
	local mnt="$1"
	[ -z "$mnt" ] && return
21 22 23
	local escaped_mnt=$(echo $mnt | sed 's:/:\\/:g')
	awk "\$2 ~ /^$escaped_mnt/ {print \$0}" /proc/mounts | \
		sed "s:$mnt:/:g; s: :\t:g" | sed 's:/\+:/:g'
24 25 26 27
}

install_mounted_root() {
	local mnt="$1"
28
	local features="ata base bootchart cdrom ext2 ext3 ide scsi usb"
29

30
	rootdev=$(awk "\$2 == \"$mnt\" { print \$1 }" /proc/mounts)
31 32 33 34 35
	if [ -z "$rootdev" ]; then
		echo "$mnt does not seem to be a mount point" >&2
		return 1
	fi

36 37 38 39 40 41
	local fs=$(awk "\$1 == \"$rootdev\" {print \$3}" /proc/mounts)
	if [ "$fs" != "ext2" ] && [ "$fs" != "ext3" ]; then
		echo "$fs is not supported. Only ext2 and ext3 are supported" >&2
		return 1
	fi
		
42 43 44 45
	rootdisk=${rootdev%[0-9]*}

	echon "Installing system on $rootdev: "
	lbu package - | tar -C "$mnt" -zx
46 47 48 49
	# apk reads config from target root so we need to copy the config
	mkdir -p "$mnt"/etc/apk/keys/
	cp /etc/apk/keys/* "$mnt"/etc/apk/keys/

50 51
	apk add -q --progress --update-cache --root "$mnt" \
		$(cat "$mnt"/var/lib/apk/world) \
52
		acct linux-grsec alpine-base >/dev/null || return 1
53 54 55
	echo ""
	# make things bootable
	kernel=$(ls "$mnt"/lib/modules)
56 57 58 59 60 61 62 63 64
	if [ "$rootdisk" = "/dev/md" ]; then
		local md=${rootdev#/dev/}
		features="$features raid"
		raidmod=$(cat /sys/block/$md/md/level)
		raidmod=",$raidmod"
		raidopt="-r"
		# get a list of slaves
		rootdisk=
		for i in /sys/block/$md/slaves/*; do
65 66 67
			j=${i##*/}
			i=${j%[0-9]*}
			rootdisk="$rootdisk /dev/${i}"
68 69
		done
	fi
70

71 72
	ln -s boot/grsec.gz "$mnt"/grsec.gz
	ln -s boot/grsec "$mnt"/grsec
73

74 75 76 77 78 79 80 81 82 83 84 85
	# create an extlinux.conf
	sed -e '/append initrd/d' \
		-e ':kernel /boot/grsec:d' \
		/media/*/syslinux.cfg > "$mnt"/boot/extlinux.conf
	cat >"$mnt"/boot/extlinux.conf <<EOF
timeout 20
prompt 1
default grsec
label grsec
	kernel /grsec
	append initrd=/grsec.gz root=$rootdev modules=sd-mod,usb-storage,ext3$raidmod quiet
EOF
86 87 88 89 90
	# fix the fstab
	enumerate_fstab "$mnt" >> "$mnt"/etc/fstab

	# install extlinux
	apk add -q syslinux
91 92 93 94
	extlinux -i $raidopt "$mnt"/boot/

	# unmount the partitions
	umount $(awk '{print $2}' /proc/mounts | grep ^"$mnt" | sort -r)
95

96 97
	# fix mbr for all disk devices
	for i in $rootdisk; do
98 99 100 101
		local errmsg
		echo "Writing MBR to $i"
		errmsg=$(dd if="$MBR" of=$i 2>&1) \
			|| echo "$errmsg"
102
	done
103 104 105 106 107
	echo ""
	echo "Installation is done. Please reboot."
	apk del -q syslinux
}

108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129


# figure out decent default swap size in mega bytes
find_swap_size() {
	local memtotal_kb=$(awk '$1 == "MemTotal:" {print $2}' /proc/meminfo)
	# use 2 * avaiable ram
	echo $(( $memtotal_kb * 2 / 1024 ))
}

has_mounted_part() {
	local p
	# parse /proc/mounts for moutned devices
	for p in $(awk '$1 ~ /^\/dev\// {gsub("/dev/", "", $1); print $1}' \
			/proc/mounts); do
		if [ -e /sys/block/$1/$p ]; then
			return 0
		fi
	done
	return 1
}

find_disks() {
130
	local p= disks=
131 132 133
	for p in $(awk '$1 ~ /[0-9]+/ {print $4}' /proc/partitions); do
		b=$(echo $p | sed 's:/:!:g')
		if [ -e /sys/block/$b/device ] && ! has_mounted_part $p; then
134
			disks="$disks $p"
135 136
		fi
	done
137
	echo $disks
138 139
}

Natanael Copa's avatar
Natanael Copa committed
140
useall() {
141 142

	local rootdisk_dev="$1"
Natanael Copa's avatar
Natanael Copa committed
143
	local i size
144 145 146 147 148 149 150 151 152 153 154 155 156
	local boot_size=100 boot_part_type="83" 
	local swap_size=$(find_swap_size) swap_part_type="82"
	local root_part_type="83"
	local raidpkg= partitions=
	local minimum_root_size=$(($boot_size * 2));

	if [ -n "$USE_RAID" ]; then
		boot_part_type="fd"
		swap_part_type="fd"
		root_part_type="fd"
		raidpkg="mdadm"
	fi

157 158
	dmesg -n1
	apk_add -q sfdisk e2fsprogs $raidpkg || return 1
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
	local root_size=$(( $(sfdisk -s $rootdisk_dev) / 1024 - $swap_size - $boot_size))
	if [ "$root_size" -lt "$minimum_root_size" ]; then
		echo "The $rootdisk_dev is too small. At least $(( $boot_size + $swap_size + $minimum_root_size)) is needed." >&2
		return 1
	fi

	echo ""
	echo "Creating the following partitions on $rootdisk_dev:"
	echo " /boot	${boot_size}MB"
	echo " swap	${swap_size}MB"
	echo " /	${root_size}MB"
	echo ""
	echo -n "WARNING: All contents of $rootdisk_dev will be erased. Continue? [y/N]: "
	read i
	case "$i" in
		y*|Y*);;
		*) return 1;;
	esac
177 178
	
	echo "Initializing partitions..."
179 180 181 182 183 184 185
	if [ -n "$USE_RAID" ]; then
		local rd
		for rd in md0 md1 md2; do
			[ -b /dev/$rd ] && mdadm --stop /dev/$rd
		done
	fi

186 187 188 189 190 191
	# new disks does not have an DOS signature in sector 0
	# this makes sfdisk complain. We can workaround this by letting
	# fdisk create that DOS signature, by just do a "w", a write.
	# http://bugs.alpinelinux.org/issues/show/145
	echo "w" | fdisk $rootdisk_dev >/dev/null

192 193 194 195 196 197
	# create new partitions
	(cat <<EOF
0,$boot_size,$boot_part_type,*
,$swap_size,$swap_part_type
,,$root_part_type
EOF
198
	) | sfdisk -q -L -uM $rootdisk_dev >>/tmp/sfdisk.out || return 1
199 200

	# create device nodes if not exist
Natanael Copa's avatar
Natanael Copa committed
201 202
	mdev -s

203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
	if [ -n "$USE_RAID" ]; then
		local p= rd=
		for p in $(sfdisk -l $rootdisk_dev 2>/dev/null \
				| awk '/Linux raid/ {print $1}'); do
			case "$p" in
				*1) rd=/dev/md0; boot_dev=/dev/md0;;
				*2) rd=/dev/md1; swap_dev=/dev/md1;;
				*3) rd=/dev/md2; root_dev=/dev/md2;;
			esac
			mdadm --create $rd --level=1 --raid-devices=2 \
				--quiet --run $p missing
		done
	else
		local p=
		for p in $(sfdisk -l $rootdisk_dev 2>/dev/null \
				| awk '$1 ~ /^\/dev/ {print $1}'); do
			case "$p" in
				*1) boot_dev=$p;;
				*2) swap_dev=$p;;
				*3) root_dev=$p;;
			esac
		done
	fi
	mkfs.ext3 -q $boot_dev >/dev/null \
		&& mkswap $swap_dev >/dev/null \
		&& mkfs.ext3 -q >/dev/null $root_dev \
		|| return 1

	mkdir -p /mnt
	mount -t ext3 $root_dev /mnt || return 1
	mkdir -p /mnt/boot
	mount -t ext3 $boot_dev /mnt/boot || return 1
	if [ -n "$USE_RAID" ]; then
		mdadm --detail --scan > /etc/mdadm.conf
		rc-update --quiet add mdadm-raid boot
	fi
	rc-update --quiet add swap boot
	# the func to generate fstab does not detect swap. add it manually
	sed -i -e '/swap/d' /etc/fstab
	echo -e "$swap_dev\tswap\t\tswap\tdefaults 0 0" >> /etc/fstab
243
	install_mounted_root /mnt
Natanael Copa's avatar
Natanael Copa committed
244 245
}

246 247 248 249 250 251 252 253
# Parse args
while getopts "r" opt; do
	case $opt in
		r) USE_RAID=1;;
	esac
done
shift $(( OPTIND - 1))

254 255
if [ -d "$1" ]; then
	# install to given mounted root
256
	install_mounted_root "${1%/}"
257 258 259
	exit $?
fi

260
disks=$(find_disks)
Natanael Copa's avatar
Natanael Copa committed
261 262 263 264

# no disks so lets exit quietly.
[ -z "$disks" ] && exit 0

265 266 267 268 269
if [ $# -gt 0 ]; then
	# check that they are 
	for i in "$@"; do
		j=$(readlink -f "$i" | sed 's:^/dev/::; s:/:!:g')
		if ! [ -e "/sys/block/$j/device" ]; then
Natanael Copa's avatar
Natanael Copa committed
270
			echo "$i is not a suitable for partitioning"
271 272 273 274 275
			exit 1
		fi
	done

else
276
	set -- $disks
277 278 279
	rootdisk=
	while ! in_list "$rootdisk" $disks "none" "abort"; do
		echo "Available disks are: $disks"
280 281
		echon "Which one is the root disk? (or none) [$1] "
		default_read rootdisk $1
282 283 284 285 286
	done
	case "$rootdisk" in
		none|abort) exit 0;;
	esac
fi
Natanael Copa's avatar
Natanael Copa committed
287

288 289 290 291 292 293 294 295 296 297
#echon "Do you want use *all* of $rootdisk for Alpine? (y/n) [n] "
#default_read useall "n"
#case "$useall" in
#	[Yy]*) useall="yes";;
#esac
#
#if [ "x$useall" != "xyes" ]; then
#	echo "Only 'use all' option is available at the moment. Sorry"
#	exit 1
#fi
Natanael Copa's avatar
Natanael Copa committed
298

299
rootdisk_dev=${rootdisk_dev:-"/dev/$rootdisk"}
Natanael Copa's avatar
Natanael Copa committed
300

301 302
if ! [ -b "$rootdisk_dev" ]; then
	echo "$rootdisk_dev is not a block device" >&2
Natanael Copa's avatar
Natanael Copa committed
303 304 305
	exit 1
fi

306
useall $rootdisk_dev