initial. broken because it expects UUID support from mount which is not compiled in by default

2014-12-03 00:31:57 +01:00
parent f4d8e7bc14
commit 84bf08c3dc
11 changed files with 412 additions and 3 deletions
--- a/image-extras/root/autoprovision-stage1.sh
+++ b/image-extras/root/autoprovision-stage1.sh
@@ -0,0 +1,142 @@
+#!/bin/sh
+
+# 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)
+
+. /root/autoprovision-functions.sh
+
+getPendriveSize()
+{
+    # this is needed for the mmc card in some (all?) Huawei 3G dongle.
+    # details: https://dev.openwrt.org/ticket/10716#comment:4
+    if [ -e /dev/sda ]; then
+        # force re-read of the partition table
+        head /dev/sda >/dev/null
+    fi
+
+    if (grep -q sda /proc/partitions) then
+        cat /sys/block/sda/size
+    else
+        echo 0
+    fi
+}
+
+hasBigEnoughPendrive()
+{
+    local size=$(getPendriveSize)
+    if [ $size -ge 2000000 ]; then
+        log "Found a pendrive of size: $(($size / 2 / 1024)) MB"
+        return 0
+    else
+        return 1
+    fi
+}
+
+setupPendrivePartitions()
+{
+    # erase partition table
+    dd if=/dev/zero of=/dev/sda bs=1M count=1
+
+    # first is 'swap'
+    # second is 'root'
+    # the rest is 'data'
+    fdisk /dev/sda <<EOF
+o
+n
+p
+1
+
+64M
+n
+p
+2
+
+512M
+n
+p
+3
+
+
+t
+1
+82
+w
+q
+EOF
+    log "Finished partitioning /dev/sda using fdisk"
+
+    until [ -e /dev/sda1 ]
+    do
+        echo "Waiting for a partitions to show up in /dev"
+        sleep 1
+    done
+
+    # 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 (?!))
+    sleep 3
+
+    mkswap -L swap -U $swapUUID /dev/sda1
+    mkfs.ext4 -L root -U $rootUUID /dev/sda2
+    mkfs.ext4 -L data -U $dataUUID /dev/sda3
+
+    log "Finished setting up filesystems"
+}
+
+setupExtroot()
+{
+    mkdir -p /mnt/extroot
+    # we need to make the internal overlay read-only, otherwise the two md5's may be different
+    # due to writing to the internal overlay from this point until the reboot.
+    # files: /.extroot.md5sum (extroot) and /etc/extroot.md5sum (internal)
+    mount -o remount,ro /
+
+    log "Remounted / as read-only"
+
+    mount UUID=$rootUUID /mnt/extroot
+    tar -C /overlay -cvf - . | tar -C /mnt/extroot -xf -
+
+    # let's write a new rc.local on extroot which will shadow the one which is in the rom and runs stage1
+    cat >/mnt/extroot/etc/rc.local <<EOF
+/root/autoprovision-stage2.sh
+exit 0
+EOF
+
+    # make sure that we shadow the /var -> /tmp symlink with the extroot, so that /var is permanent
+    mkdir -p /mnt/extroot/var
+    # KLUDGE: but /var/state is assumed to be transient, see https://dev.openwrt.org/ticket/12228
+    cd /mnt/extroot/var
+    ln -s /tmp state
+    cd -
+
+    log "Finished setting up extroot"
+}
+
+autoprovisionStage1()
+{
+    signalAutoprovisionWorking
+
+    # this way it will set a random password and only ssh key based login will work
+    setRootPassword ""
+
+    signalAutoprovisionWaitingForUser
+    signalWaitingForPendrive
+
+    until hasBigEnoughPendrive
+    do
+        echo "Waiting for a pendrive to be inserted"
+        sleep 3
+    done
+
+    signalAutoprovisionWorking # to make it flash in sync with the USB led
+    signalFormatting
+
+    sleep 1
+
+    setupPendrivePartitions
+    sleep 1
+    setupExtroot
+
+    sync
+    stopSignallingAnything
+    reboot
+}
+
+autoprovisionStage1