archlive_hook


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

# vim: set ft=sh:
run_hook ()
{
#Big Fat TODO... we need to add possible boot 'cheatcodes'
#  as is common in most livecds.  However, most of these can be handled
#  in real userspace (early userspace only needs to load the squashfs
#  image.  That is _all_.  Others will be handled in a custom rc.local/rc.conf

    #This is going to get brutal...

    if [ "x${ramdisk_size}" = "x" ]; then
        ramdisk_size="75%"
    fi
    msg -n ":: Mounting tmpfs, size=${ramdisk_size}..."
	mount -t tmpfs -o "size=${ramdisk_size}" tmpfs /tmpfs
    mkdir /tmpfs/bootcd
    msg "done."

    squashfound=0
    msg -n ":: Scanning for boot cdrom device..."
    for cdrom in /dev/cd/*; do
        if mount -r -t iso9660 "${cdrom}" /tmpfs/bootcd >/dev/null 2>&1; then
            if [ -e /tmpfs/bootcd/archlive.sqfs ]; then
                squashfound=1
                msg "${cdrom}"
                break
            fi
        fi
        [ $squashfound -eq 0 ] && umount /tmpfs/bootcd >/dev/null 2>&1
    done

    if [ $squashfound -eq 0 ]; then
        echo "ERROR: cannot find booted cdrom device, cannot continue..."
        exit 1
    fi

    msg -n ":: Mounting squashfs image..."
    /bin/modprobe -q squashfs >/dev/null 2>&1
    mkdir -p /tmpfs/squashfs_root
    if ! losetup /dev/loop0 /tmpfs/bootcd/archlive.sqfs; then
        echo "ERROR: Cannot mount loop device /dev/loop0...aborting"
        exit 1
    fi
    mount -r -t squashfs /dev/loop0 /tmpfs/squashfs_root
    #mount.full -r -t squashfs -o loop /tmpfs/bootcd/squashfs_image /tmpfs/squashfs_root
    msg "done."

    msg -n ":: Mounting root (union) filesystem..."
    /bin/modprobe -q unionfs >/dev/null 2>&1
	mount -t unionfs -o dirs=/tmpfs=rw:/tmpfs/squashfs_root=ro,debug=0 none /real_root
    msg "done."

    if [ -d /proc/sus/dev/cdrom ]; then
        echo 0 > /proc/sys/dev/cdrom/lock
        echo 1 > /proc/sys/dev/cdrom/autoeject
    fi

    msg ":: Stopping udevd"
    udevpid=$(/bin/minips -C udevd -o pid=)
    [ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid
    #Yep, we're bailing out here.  We don't need kinit.
    msg ":: Passing control to Archlinux Initscripts..."
    exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
}