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    Annotation of /trunk/mkinitrd/lib/linuxrc.sh

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    Revision 333 - (hide annotations) (download) (as text)
    Tue Feb 21 00:02:17 2006 UTC (18 years, 2 months ago) by niro
    File MIME type: application/x-sh
    File size: 4777 byte(s) 
    mkinitrd-livecd; probably working
    1 niro 333 #!/bin/sh
    2     # $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.1 2006-02-21 00:02:17 niro Exp $
    3    
    4     # loads given kernel modules
    5     load_kernel_modules()
    6     {
    7     local type="$1"
    8     local module
    9     local args
    10    
    11     echo -e "-- Loading ${type} modules:"
    12     ( cat /etc/modules.${type}; echo) | while read module args
    13     do
    14     case "${module}" in
    15     \#*|"") continue ;;
    16     esac
    17    
    18     if [ -e /lib/${module}.ko ]
    19     then
    20     insmod -f /lib/${module}.ko ${args} > /dev/null 2>&1
    21     [ $? -eq 0 ] && echo -e "-- ${module}"
    22     fi
    23     done
    24     echo
    25     }
    26    
    27     # check_drives $devices $fstype
    28     check_drives()
    29     {
    30     local devices="$1"
    31     local fs="$2"
    32    
    33     for dev in ${devices}
    34     do
    35     mount -t ${fs} ${dev} /sysroot/mnt/cdrom >/dev/null 2>&1
    36     media_found=$?
    37    
    38     # if mount was ok check if cdid exists
    39     if [ "${media_found}" -eq 0 ]
    40     then
    41     [ -e /sysroot/mnt/cdrom/livecdrootfs.sqsh ] && media_id_ok=$?
    42     umount /sysroot/mnt/cdrom
    43    
    44     if [ "${media_id_ok}" -eq 0 ]
    45     then
    46     echo -e "Magellan boot device found."
    47     BOOT_DEVICE="${dev}"
    48     FSTYPE=${fs}
    49     break
    50     fi
    51     fi
    52     done
    53     }
    54    
    55     ## some defaults ##
    56     DOSCSI=no
    57     DOUSB=no
    58     DOSATA=no
    59    
    60     ## starts here ##
    61    
    62     # mount essential filesystems
    63     mount -t proc proc /proc
    64     mount -t sysfs sysfs /sys
    65    
    66     # silencio
    67     echo 0 > /proc/sys/kernel/printk
    68    
    69     echo "-- Creating inital device nodes ..."
    70     mount -o mode=0755 -t tmpfs udev /dev
    71     mkdir /dev/pts
    72     mkdir /dev/shm
    73     mkdir /dev/mapper
    74     mknod /dev/console c 5 1
    75     mknod /dev/null c 1 3
    76     mknod /dev/ram b 1 1
    77     mknod /dev/rtc c 10 135
    78     mknod /dev/systty c 4 0
    79     mknod /dev/tty c 5 0
    80     mknod /dev/zero c 1 5
    81     mknod /dev/tty0 c 4 0
    82     mknod /dev/tty1 c 4 1
    83     mknod /dev/tty2 c 4 2
    84     mknod /dev/tty3 c 4 3
    85     mknod /dev/tty4 c 4 4
    86     mknod /dev/tty5 c 4 5
    87     mknod /dev/tty6 c 4 6
    88     mknod /dev/tty7 c 4 7
    89     mknod /dev/tty8 c 4 8
    90     mknod /dev/tty9 c 4 9
    91     mknod /dev/tty10 c 4 10
    92     mknod /dev/tty11 c 4 11
    93     mknod /dev/tty12 c 4 12
    94     mknod /dev/ttyS0 c 4 64
    95     mknod /dev/ttyS1 c 4 65
    96     mknod /dev/ttyS2 c 4 66
    97     mknod /dev/ttyS3 c 4 67
    98    
    99     echo "-- Starting udevd ..."
    100     ln -snf bin /sbin
    101     /sbin/udevstart
    102     ln -snf /proc/self/fd /dev/fd
    103     ln -snf fd/0 /dev/stdin
    104     ln -snf fd/1 /dev/stdout
    105     ln -snf fd/2 /dev/stderr
    106     ln -snf /proc/kcore /dev/core
    107     touch /dev/.udev
    108    
    109     echo "-- Setting up hotplug ..."
    110     #echo "/sbin/hotplug" > /proc/sys/kernel/hotplug
    111     echo "/sbin/udev" > /proc/sys/kernel/hotplug
    112    
    113     # check command line for params
    114     for i in $(cat /proc/cmdline)
    115     do
    116     case "${i}" in
    117     doscsi)
    118     DOSCSI=yes
    119     ;;
    120     dousb)
    121     DOUSB=yes
    122     ;;
    123     dosata)
    124     DOSATA=yes
    125     ;;
    126     esac
    127     done
    128    
    129     # now load all needed modules
    130     load_kernel_modules "generic"
    131     [ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
    132     [ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
    133     [ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
    134    
    135     # create newroot mount point
    136     mkdir -p /sysroot
    137     # fake a new filesystem (also needed with an initramfs!!)
    138     mount -t tmpfs tmpfs /sysroot
    139    
    140     mkdir -p /sysroot/mnt/cdrom
    141     mkdir -p /sysroot/mnt/cloop
    142     mkdir -p /sysroot/mnt/magellan
    143    
    144    
    145     # needed for the usbstick, the timeout maybe to short
    146     if [ "${DOUSB}" = "yes" ]; then
    147     echo "-- Waiting 3 seconds for possible usb mount ..."
    148     sleep 3
    149     fi
    150    
    151     # searching cdrom with cdid
    152     BOOT_DEVICE=""
    153     FSTYPE=""
    154    
    155     echo "Searching for a boot device ..."
    156    
    157     # searching usbstick
    158     check_drives "/dev/scsi/host[0-99]/bus[0-99]/target[0-99]/lun[0-99]/part[0-99]" "vfat"
    159    
    160     # for cdrom_device in $CDROM_LIST (ide)
    161     check_drives "/dev/cdroms/*" iso9660
    162     check_drives "/dev/hd*" iso9660
    163    
    164     # scsi cdroms
    165     check_drives "/dev/sr*" iso9660
    166    
    167     # mount our rootfs from cdrom
    168     if [ "${BOOT_DEVICE}" = "" ]
    169     then
    170     echo "No Magellan boot CD/USBStick found!!!"
    171     ash
    172     exit 1
    173     else
    174     echo -e "Booting from: $BOOT_DEVICE ..."
    175     mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
    176    
    177     # write our boot_device to /mnt/.bootdev for later use (mtab)
    178     echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
    179     echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
    180    
    181     # mount squashfs
    182     echo -e "Mounting squashfs system image ..."
    183     echo
    184     [ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
    185     mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh /sysroot/mnt/cloop
    186    
    187     # symlinking cloop rootfs to /mnt as newroot
    188     cd /sysroot
    189    
    190     for x in bin sbin lib boot usr opt
    191     do
    192     ln -s mnt/cloop/${x} ${x}
    193     done
    194     mkdir -p initrd proc tmp sys var/tmp dev
    195     chmod 1777 tmp var/tmp
    196    
    197     # make /sysroot/dev/console & /mnt/dev/null
    198     [ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
    199     [ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
    200    
    201     (cd /sysroot/mnt/cloop; cp -a etc root home var /sysroot)
    202    
    203     # shurely change to correct permissions
    204     chmod 1777 /sysroot/tmp
    205     chmod 1777 /sysroot/var/tmp
    206     fi
    207    
    208     cd /
    209    
    210     # de-silencio
    211     echo 3 > /proc/sys/kernel/printk
    212    
    213     echo "-- Switching to real sysroot ..."
    214     umount /sys
    215     umount /proc
    216    
    217     exec run-init /sysroot /sbin/init $@ </sysroot/dev/console >/sysroot/dev/console