143 lines
3.0 KiB
Bash
143 lines
3.0 KiB
Bash
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#!/bin/sh
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# autoprovision stage 1: this script will be executed upon boot without a valid extroot (i.e. when rc.local is found and run from the internal overlay)
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. /root/autoprovision-functions.sh
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getPendriveSize()
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{
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# this is needed for the mmc card in some (all?) Huawei 3G dongle.
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# details: https://dev.openwrt.org/ticket/10716#comment:4
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if [ -e /dev/sda ]; then
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# force re-read of the partition table
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head /dev/sda >/dev/null
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fi
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if (grep -q sda /proc/partitions) then
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cat /sys/block/sda/size
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else
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echo 0
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fi
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}
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hasBigEnoughPendrive()
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{
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local size=$(getPendriveSize)
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if [ $size -ge 2000000 ]; then
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log "Found a pendrive of size: $(($size / 2 / 1024)) MB"
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return 0
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else
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return 1
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fi
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}
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setupPendrivePartitions()
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{
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# erase partition table
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dd if=/dev/zero of=/dev/sda bs=1M count=1
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# first is 'swap'
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# second is 'root'
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# the rest is 'data'
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fdisk /dev/sda <<EOF
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o
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n
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p
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1
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+64M
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n
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p
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2
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+512M
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n
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p
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3
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t
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1
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82
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w
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q
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EOF
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log "Finished partitioning /dev/sda using fdisk"
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until [ -e /dev/sda1 ]
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do
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echo "Waiting for a partitions to show up in /dev"
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sleep 1
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done
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# just to be sure we wait a bit more (i've seen once that mkswap worked on /dev/sda1, but then mkfs errored that there's no /dev/sda2 (?!))
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sleep 3
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mkswap -L swap -U $swapUUID /dev/sda1
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mkfs.ext4 -L root -U $rootUUID /dev/sda2
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mkfs.ext4 -L data -U $dataUUID /dev/sda3
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log "Finished setting up filesystems"
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}
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setupExtroot()
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{
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mkdir -p /mnt/extroot
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# we need to make the internal overlay read-only, otherwise the two md5's may be different
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# due to writing to the internal overlay from this point until the reboot.
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# files: /.extroot.md5sum (extroot) and /etc/extroot.md5sum (internal)
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mount -o remount,ro /
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log "Remounted / as read-only"
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mount UUID=$rootUUID /mnt/extroot
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tar -C /overlay -cvf - . | tar -C /mnt/extroot -xf -
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# let's write a new rc.local on extroot which will shadow the one which is in the rom and runs stage1
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cat >/mnt/extroot/etc/rc.local <<EOF
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/root/autoprovision-stage2.sh
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exit 0
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EOF
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# make sure that we shadow the /var -> /tmp symlink with the extroot, so that /var is permanent
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mkdir -p /mnt/extroot/var
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# KLUDGE: but /var/state is assumed to be transient, see https://dev.openwrt.org/ticket/12228
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cd /mnt/extroot/var
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ln -s /tmp state
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cd -
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log "Finished setting up extroot"
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}
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autoprovisionStage1()
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{
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signalAutoprovisionWorking
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# this way it will set a random password and only ssh key based login will work
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setRootPassword ""
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signalAutoprovisionWaitingForUser
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signalWaitingForPendrive
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until hasBigEnoughPendrive
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do
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echo "Waiting for a pendrive to be inserted"
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sleep 3
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done
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signalAutoprovisionWorking # to make it flash in sync with the USB led
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signalFormatting
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sleep 1
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setupPendrivePartitions
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sleep 1
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setupExtroot
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sync
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stopSignallingAnything
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reboot
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}
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autoprovisionStage1
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