WebSVN – livecd – Diff – /trunk/linux-live.sl/initrd/linuxrc

 #!/bin/ash
+#
 # Original version from http://www.linux-live.org/
+#
 # modified by Urs Beyerle, PSI
 # - to allow LiveCD mounted over NFS
 # - add support for LiveCD on SATA devices
 export PATH=.:/:/usr/sbin:/usr/bin:/sbin:/bin
 . liblinuxlive
 echolog "mounting /proc and /sys filesystems"
 mount -t proc proc /proc
 mount -t sysfs sysfs /sys
+ln -sf /proc/mounts /etc/mtab # this allows us to use umount -a
 # setup DEBUGCMD variable. If debug boot option is present, call debug()
 # function several times during script's execution
 if [ "`cmdline_parameter debug`" ]; then DEBUGCMD="debug"; else DEBUGCMD=""; fi
 $DEBUGCMD
+# amount of RAM to store changes
+RAMSIZE="`cmdline_value ramsize`"
+if [ "$RAMSIZE" = "" ]; then RAMSIZE="70%"; fi
 # I have to set these variables very carefully
 UNION=/union
 MEMORY=/memory
 #MOUNTDIR=mnt
 MOUNTDIR=livecd
 CHANGES=$MEMORY/changes
 COPY2RAM=$MEMORY/copy2ram
 IMAGES=$MEMORY/images
 INITRAMDISK=$MOUNTDIR/live
 # set NFSROOT if nfsroot= in boot parameter
 NFSROOT="`cmdline_value nfsroot`"
 # we need cdrom support, isofs support, unionfs support, etc
 modprobe_essential_modules
 setup_dma
 $DEBUGCMD
-# load network modules, if NFSROOT is set
+# if NFSROOT is set:
 echolog "check for nfsroot"
 if [ "$NFSROOT" != "" ]; then
-   echolog "nfsroot: $NFSROOT"
-   # mii maybe need by NIC
-   echolog "load module mii"
-   modprobe_module mii
-   # detecting network card
-   PCITABLE=/bin/pcitable
-   NICS=`lspci -n | awk '/Class 0200/ {print $4}' | tr ':' ' ' \
-   | while read x y ; do grep "0x$x.*0x$y" $PCITABLE \
-   | awk '$3 !~ /"unknown"/ {print $3}' | tr -d '"' ; done`
-   echolog "Found network card(s): $NICS"
-   if [ -n "$NICS" ]; then
-       echo $NICS | while read nic ; do
-	   echo "Loading module $nic"
-	   modprobe_module $nic
-       done
-   else
-       echo "ERROR: No network card detected!"
-       echo "Type in your network card driver (e.g. tg3, e1000). "
-       echo "Or ask your system administrator for help."
-       echo -n "Network card driver: "
-       read nic
-       echo "Loading module $nic"
-       modprobe_module $nic
-   fi
-fi
+   # load network modules, if NFSROOT is set
+   echolog "nfsroot: $NFSROOT"
-$DEBUGCMD
+   load_network_modules
-# get DHCP lease
-if [ "$NFSROOT" != "" ]; then
-    # create /dev/urandom (needed by udhcpc)
-    mknod /dev/urandom c 1 9
-    echolog "Try to get DHCP lease on eth0"
-    udhcpc --now --quit --interface=eth0 --script=/bin/udhcpc.script
-    if [ $? -ne 0 ]; then
-	echo "ERROR: couldn't get DHCP lease, trying again"
-	udhcpc --now --quit --interface=eth0 --script=/bin/udhcpc.script
-	if [ $? -ne 0 ]; then
-	    echo "ERROR: couldn't get DHCP lease, trying eth1"
-	    udhcpc --now --quit --interface=eth1 --script=/bin/udhcpc.script
-	    if [ $? -ne 0 ]; then
-		echo "ERROR: couldn't get DHCP lease, trying again eth1"
-		udhcpc --now --quit --interface=eth1 --script=/bin/udhcpc.script
-		if [ $? -ne 0 ]; then
-		    echo "ERROR: can't get DHCP lease on eth0 and eth1"
-		fi
-	    fi
-	fi
-    fi
+   $DEBUGCMD
-fi
+   # get DHCP lease
+   echolog "get DHCP lease"
+   get_dhcp_lease
-$DEBUGCMD
+   $DEBUGCMD
-# we need nfs modules loaded, if NFSROOT is set
+    # we need nfs modules loaded, if NFSROOT is set
-if [ "$NFSROOT" != "" ]; then
     modprobe_nfs_modules
 fi
 $DEBUGCMD
 # $UNION will be used as a root directory, livecd modules will be added soon.
 echolog "setup union on $UNION"
 mkdir -p $UNION
 mkdir -p $MEMORY
 CHANGESDEV="`cmdline_value changes`"
 if [ "$CHANGESDEV" != "" ]; then
    echo "mounting $CHANGESDEV to $MEMORY"
    mount_device $CHANGESDEV $MEMORY
 else false; fi
 # mount tmpfs only in the case when changes= boot parameter was empty
 # or we were not able to mount the storage device
-if [ $? -ne 0 ]; then mount -t tmpfs -o "size=80%" tmpfs $MEMORY; fi
+if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi
 mkdir -p $CHANGES
 mkdir -p $COPY2RAM
 mkdir -p $IMAGES
 mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION
 if [ $? -ne 0 ]; then fatal "can't setup union in /union directory"; fi
 $DEBUGCMD
 # try to find livecd data directory. If not found, try modprobing
 # USB and SATA kernel modules and repeat the find procedure again
 echolog "looking for data modules"
 DATA="`find_live_data_dir $MOUNTDIR`";
 # if [ "$DATA" = "" ]; then modprobe_usb_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
 if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
 if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found. Are you using SCSI?"; fi
 echolog "LiveCD found in: $DATA"
 $DEBUGCMD
 # If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.
 # (skip modules from /optional/ which are not listed in load= boot option)
 # Finaly modify DATA variable so it will point to correct directory
 if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then
    echolog "copying modules to RAM, this may take some time"
    copy_to_ram $DATA $COPY2RAM
    cd_autoeject 1
    umount $DATA 2>/dev/null
    if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi
    DATA=$COPY2RAM
    cd_autoeject 0
 fi
 mkdir -p $UNION/boot
 mount -o bind $DATA $UNION/boot
 $DEBUGCMD
 # DATA contains path to the base directory of all .mo images which need
 # to be mounted and inserted into live filesystem. Do it now.
 echolog "inserting all modules and creating live filesystem"
 union_insert_modules $UNION $DATA $IMAGES
 $DEBUGCMD
 echo "copying rootchanges"
 copy_rootchanges $DATA $UNION
 $DEBUGCMD
 echo "creating /etc/fstab"
 activate_fstab $UNION
 # More likely these directories aren't there.
 # Even if they are, this won't hurt.
 mkdir -p $UNION/proc
 mkdir -p $UNION/sys
 mkdir -p $UNION/tmp
+chmod 1777 $UNION/tmp
 mkdir -p $UNION/dev
+mkdir -p $UNION/initrd
 $DEBUGCMD
 # Union contains all the files and directories unioned from all modules.
 # Change root directory to it, and move initrd's root to /livecd/live/initramdisk
 # Finaly execute /sbin/init to start the distribution.
 echolog "changing root directory..."
 cd $UNION
 mkdir -p $INITRAMDISK
 umount /sys # we won't need it anymore
 if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi
 if [ -x $UNION/usr/sbin/chroot ];
   then CHROOT=/usr/sbin/chroot
   else CHROOT=/usr/bin/chroot
 fi
 echolog "End of linux live scripts"
 # pure magic ;-)
 cat $UNION/bin/true >/dev/null
 $DEBUGCMD
 pivot_root . $INITRAMDISK
-exec $CHROOT . sbin/init <dev/console >dev/console 2>&1; fi
+exec $CHROOT . sbin/init <dev/console >dev/console 2>&1
 header "ERROR!"
 echolog "You are not supposed to be here, something went wrong!"
 echolog "Even Ctrl+Alt+Del won't help you in kernel panic."

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