#! /bin/sh
# #############################################################################

       NAME_="bkernel"
       HTML_="build linux kernel script"
    PURPOSE_="build linux kernels 2.2.xx and 2.4.xx"
   SYNOPSIS_="$NAME_ [-hml] -a|-b <kernel_version>"
   REQUIRES_="standard GNU commands"
    VERSION_="1.2"
       DATE_="2002-05-17; last update: 2003-11-12"
     AUTHOR_="Dawid Michalczyk <dm@eonworks.com>"
        URL_="www.comp.eonworks.com"
   CATEGORY_="admin"
   PLATFORM_="Linux"
      SHELL_="bash"
 DISTRIBUTE_="yes"

# #############################################################################
# This program is distributed under the terms of the GNU General Public License

usage() {

echo >&2 "$NAME_ $VERSION_ - $PURPOSE_
Usage: $SYNOPSIS_
Requires: $REQUIRES_
Options:
     -a <kernel_version>, build kernel with modules
     -b <kernel_version>, build kernel with no modules    
     -h, usage and options (this help)
     -m, manual
     -l, see this script"
    exit 1
}

manual() { echo >&2 "

NAME

    $NAME_ $VERSION_ - $PURPOSE_

SYNOPSIS

    $SYNOPSIS_

DESCRIPTION

    This script compiles the i386 architecture 2.2.xx and 2.4.xx linux kernels
    assuming that the sources are located in /usr/src/linux. Although the kernel
    does not need to be compiled as root, the script must be run as root to be
    able to install modules and the kernel.

AUTHOR

    $AUTHOR_ Suggestions and bug reports are welcome.
    For updates and more scripts visit $URL_

"; exit 1; }

# local functions
kernel_modules () {

    cd /usr/src/linux && \
    make dep && make clean && make bzImage && make modules && make modules_install && \
    cp arch/i386/boot/bzImage /boot/vmlinuz-${1} && cp System.map /boot/System.map-${1} && \
    echo Done compiling linux kernel $1 with modules
    echo "don't forget to edit /etc/lilo.conf and run lilo"

 }

kernel_no_modules () {

    cd /usr/src/linux && \
    make dep && make clean && make bzImage && \
    cp arch/i386/boot/bzImage /boot/vmlinuz-${1} && cp System.map /boot/System.map-${1} && \
    echo Done compiling linux kernel $1 with no modules
    echo "don't forget to edit /etc/lilo.conf and run lilo"
 
 } 

# args check
[ $# -eq 0 ] && { echo >&2 missing argument, type $NAME_ -h for help; exit 1; }

# args and options
while getopts hmla:b: options; do

    case $options in

        a) kernel_modules $OPTARG ;;
        b) kernel_no_modules $OPTARG ;;	
        h) usage ;;
        m) manual ;;
        l) more $0; exit 1 ;;
       \?) echo invalid argument, type $NAME_ -h for help; exit 1 ;;

    esac

done