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    • /[magellan-source]/trunk/mkinitrd/lib/linuxrc.sh

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

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    Revision 400 - (show annotations) (download) (as text)
    Fri Nov 24 17:27:28 2006 UTC (17 years, 5 months ago) by niro
    File MIME type: application/x-sh
    File size: 3830 byte(s) 
    removed udev, using a static /dev for initial boots. udev gets started later
    1 #!/bin/sh
    2 # $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.6 2006-11-24 17:27:28 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 # check command line for params
    70 for i in $(cat /proc/cmdline)
    71 do
    72 case "${i}" in
    73 doscsi)
    74 DOSCSI=yes
    75 ;;
    76 dousb)
    77 DOUSB=yes
    78 ;;
    79 dosata)
    80 DOSATA=yes
    81 ;;
    82 esac
    83 done
    84
    85 # now load all needed modules
    86 load_kernel_modules "generic"
    87 [ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
    88 [ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
    89 [ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
    90
    91 # create newroot mount point
    92 mkdir -p /sysroot
    93 # fake a new filesystem (also needed with an initramfs!!)
    94 mount -t tmpfs tmpfs /sysroot
    95
    96 mkdir -p /sysroot/mnt/cdrom
    97 mkdir -p /sysroot/mnt/cloop
    98 mkdir -p /sysroot/mnt/magellan
    99
    100
    101 # needed for the usbstick, the timeout maybe to short
    102 if [ "${DOUSB}" = "yes" ]; then
    103 echo "-- Waiting 8 seconds for possible usb mount ..."
    104 sleep 8
    105 fi
    106
    107 # searching cdrom with cdid
    108 BOOT_DEVICE=""
    109 FSTYPE=""
    110
    111 echo "Searching for a boot device ..."
    112
    113 # searching usbstick
    114 if [ "${DOUSB}" = "yes" ]; then
    115 check_drives "/dev/scsi/host[0-99]/bus[0-99]/target[0-99]/lun[0-99]/part[0-99]" "vfat"
    116 fi
    117
    118 # for cdrom_device in $CDROM_LIST (ide)
    119 check_drives "/dev/cdroms/*" iso9660
    120 check_drives "/dev/hd*" iso9660
    121
    122 # scsi cdroms
    123 if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then
    124 check_drives "/dev/sr*" iso9660
    125 fi
    126
    127 # mount our rootfs from cdrom
    128 if [ "${BOOT_DEVICE}" = "" ]
    129 then
    130 echo "No Magellan boot CD/USBStick found!!!"
    131 ash
    132 exit 1
    133 else
    134 echo -e "Booting from: $BOOT_DEVICE ..."
    135 mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
    136
    137 # write our boot_device to /mnt/.bootdev for later use (mtab)
    138 echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
    139 echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
    140
    141 # mount squashfs
    142 echo -e "Mounting squashfs system image ..."
    143 echo
    144 [ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
    145 mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh /sysroot/mnt/cloop
    146
    147 # symlinking cloop rootfs to /mnt as newroot
    148 cd /sysroot
    149
    150 for x in bin sbin lib boot usr opt
    151 do
    152 ln -s mnt/cloop/${x} ${x}
    153 done
    154 mkdir -p initrd proc tmp sys var/tmp dev media
    155
    156 # make /sysroot/dev/console & /mnt/dev/null
    157 [ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
    158 [ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
    159
    160 (cd /sysroot/mnt/cloop; cp -a etc root home var /sysroot)
    161
    162 # ensure the right permissions
    163 chmod 1777 /sysroot/tmp
    164 chmod 1777 /sysroot/var/tmp
    165 fi
    166
    167 cd /
    168
    169 # de-silencio
    170 echo 3 > /proc/sys/kernel/printk
    171
    172 echo "-- Switching to real sysroot ..."
    173 umount /sys
    174 umount /proc
    175
    176 exec run-init /sysroot /sbin/init $@ </sysroot/dev/console >/sysroot/dev/console