Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/boot/i386/root/usr/lib/bootloader/bootloader_entry

Text File | 2006-11-29 | 4.6 KB | 164 lines

#!/bin/bash
#
# This script represents an interface between the postinstall and postuninstall
# scripts of kernel rpms and the update-bootloader script.
#
# Interface:
# ----------
# /usr/lib/bootloader/bootloader_entry [add|remove] <kernel-flavor> <kernel-release> <image-name> <initrd-name>
#
# Call Semantics:
# ---------------
# [ -x $cmd ] && $cmd <parameters>
#
#
# Author: [e-mail]
#


# Print how to use this script correctly
function usage()
{
    echo "Unknown or missing parameter."
    echo "Usage: $0 [add|remove] <kernel-flavor> <kernel-release> <image-name> <initrd-name>"
    echo
    echo "The old interface with 4 parameters is still supported, but deprecated."
    echo "This interface will be dropped in the near future."
    echo "Usage: $0 [add|remove] <kernel-package-name> <image-name> <initrd-name>"
    exit 1
}


# Get all command line arguments
function getargs()
{
    # old interface with 4 parameters
    if [ $# -eq 4 ] ; then
        action=${1}        # contains the action to be executed, e.g. "add" or "remove"
        flavor=${2#*-}    # contains the kernel-flavor, e.g. "default" or "xen"
        flavor=${flavor%%-*}
        release=${2#*-*-}    # contains the kernel-release, e.g. "2.6.18-4-default"
        release=${release%.*.*}
        release="${release}-${flavor}"
        image=${3}        # contains the full image name, e.g. "vmlinuz-2.6.18-4-default"
        initrd=${4}        # contains the full initrd name, e.g. "initrd-2.6.18-4-default"

    # new interface with 5 parameters
    else
        action=${1}        # contains the action to be executed, e.g. "add" or "remove"
        flavor=${2}        # contains the kernel-flavor, e.g. "default" or "xen"
        release=${3}    # contains the kernel-release, e.g. "2.6.18-4-default"
        image=${4}        # contains the full image name, e.g. "vmlinuz-2.6.18-4-default"
        initrd=${5}        # contains the full initrd name, e.g. "initrd-2.6.18-4-default"
    fi
}


# Wrapper for the update-bootloader function
function update_bootloader()
{
    [ -x /sbin/update-bootloader -a \
      "$YAST_IS_RUNNING" != instsys ] || return 0
    /sbin/update-bootloader "$@"
}


##############################
# Add a new bootloader entry #
##############################
function add_entry()
{
    # Set up the new kernel
    if [ "$YAST_IS_RUNNING" != instsys ]; then
        case $flavor in
            (kdump|um)
                ;;
            (*)
                opt_xen_kernel=
                case $flavor in
                xen*)
                    set -- $flavor
                    set -- ${1#xen}
                    opt_xen_kernel=--xen-kernel=/boot/xen${1:+-$1}.gz
                    ;;
                esac

                # Add the new bootloader entry
                update_bootloader --image /boot/$image \
                  --initrd /boot/$initrd \
                  --default \
                  --add \
                  --force $opt_xen_kernel \
                  --name "Kernel-$release"

                # Run the bootloader (e.g., lilo).
                update_bootloader --refresh
                ;;
        esac
    fi
}


#######################################
# Remove an existing bootloader entry #
#######################################
function remove_entry()
{
    # Do not specify the name of a bootloader entry when removing it, thus
    # removing all sections matching the kernel image and initrd names
    # (either both a "linux" and a "failsafe" section, or a section
    # installed with the kernel postinstall script).
    #
    # Rationale: we do not know whether the old entry has
    #    - the product name as its name (when installed with
    #      yast-bootloader) or
    #    - "Kernel-<version>" (when installed with the kernel package's
    #       postinstall script and perl-Bootloader).
    #
    #  So we cannot use the name to find the correct section.
    #  This is safe, because on grub, this does still not match other
    #  sections on other partitions with the same name for the kernel
    #  image and initrd (because they will still have the (hdx,y) prefix
    #  in perl-Bootloader). Other bootloaders do not specify other
    #  sections at all, or do only chainload them (BootLILO.ycp), and
    #  thus do not match either. (#223030)
    #
       update_bootloader --image /boot/$image \
              --initrd /boot/$initrd \
              --remove \
              --force

    # Run the bootloader (e.g., lilo).
       update_bootloader --refresh
}



#####################  M A I N  ###############################################


# Checks if correct amount of arguments is given
if [ "$#" -ne "4" -a "$#" -ne "5" ] ; then
    usage
fi

# Get all given arguments
getargs $@

# Find out which action should be executed
case $action in
    add)
        # Add a new bootloader entry
        add_entry
        ;;
    remove)
        # Remove an existing bootloader entry
        remove_entry
        ;;
    *)
        # Unknown argument
        usage
        ;;
esac