add directory study
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206
study/boot/mkbootdisk
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206
study/boot/mkbootdisk
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#!/bin/bash
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# mkbootdisk
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#
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# Written by Erik Troan <ewt@redhat.com>
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pause=yes
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unset kernel
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device=/dev/fd0
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unset verbose
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unset witheth
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unset mkinitrdargs
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unset compact
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MOUNTDIR=/tmp/mkbootdisk
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PATH=/sbin:$PATH
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export PATH
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VERSION=1.4.2
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usage () {
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cat >&2 <<EOF
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usage: `basename $0` [--version] [--noprompt] [--mkinitrdargs <args>]
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[--device <devicefile>] [--verbose -v] [--compact] <kernel>
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(ex: `basename $0` --device /dev/fd1 2.0.31)
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EOF
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exit $1
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}
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while [ $# -gt 0 ]; do
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case $1 in
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--device)
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shift
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device=$1
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;;
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--mkinitrdargs)
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shift
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mkinitrdargs=$1
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;;
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--help)
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usage 0
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;;
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--noprompt)
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unset pause
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;;
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-v)
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verbose=true
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;;
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--verbose)
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verbose=true
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;;
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--version)
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echo "mkbootdisk: version $VERSION"
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exit 0
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;;
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--compact)
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compact="compact"
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;;
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*)
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if [ -z "$kernel" ]; then
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kernel=$1
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else
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usage
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fi
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;;
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esac
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shift
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done
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[ -z "$kernel" ] && usage 1
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[ -d /lib/modules/$kernel ] || {
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echo "/lib/modules/$kernel is not a directory." >&2
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exit 1
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}
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[ -f /boot/vmlinuz-$kernel ] || {
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echo "/boot/vmlinuz-$kernel does not exist." >&2
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exit 1
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}
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[ -f /etc/modules.conf -a -f /lib/modules/$kernel/modules.dep ] && {
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ethmodule=`sort -u /etc/modules.conf | awk '/^alias eth0/ { print $3 }'`
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[ -n "$ethmodule" ] && {
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if echo $ethmodule | grep '\.o$'; then
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ethmodule=`echo ${ethmodule} | sed "s/\.o$//"`
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fi
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deps=`grep "/net/$ethmodule.o" /lib/modules/$kernel/modules.dep | head -1`
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deps=`echo $deps | cut -d: -f2`
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for n in $deps; do
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mod=`basename $n | cut -d. -f1`
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witheth="$witheth --with $mod"
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done
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witheth="$witheth --with $ethmodule"
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}
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}
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[ -f /lib/modules/$kernel/fs/isofs.o ] &&
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withfs="$withfs --with isofs"
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[ -f /lib/modules/$kernel/fs/nfs.o ] &&
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withfs="$withfs --with nfs"
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[ -f /lib/modules/$kernel/fs/fat.o ] &&
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withfs="$withfs --with fat"
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[ -f /lib/modules/$kernel/fs/msdos.o ] &&
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withfs="$withfs --with msdos"
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rootdev=`awk '$1 ~ /^[^#]/ && $2 ~ /^\/$/ { print $1 ; exit }' /etc/fstab`
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if [ $(echo $rootdev | cut -c1-6) = "LABEL=" ]; then
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rootlabel=$(echo $rootdev | cut -c7-)
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# whee, now we have to look through every partition looking for
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# the thing called $rootlabel, which could be raid. Ick.
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list=$(tail +3 /proc/partitions | awk '{ print $4 '} | grep '^md')
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list="$list $(tail +3 /proc/partitions |
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awk '{ print $4 '} | grep -v '^md')"
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rootdev=""
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for dev in $list; do
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if tune2fs -l /dev/$dev >/dev/null 2>/dev/null; then
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label=$(tune2fs -l /dev/$dev 2>/dev/null |
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grep "Filesystem volume name" | awk '{print $4}')
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if [ "$label" = $rootlabel ]; then
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rootdev=/dev/$dev
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break
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fi
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fi
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done
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fi
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[ -z $rootdev ] && {
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echo 'Cannot find root partition in /etc/fstab.' >&2
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exit 1
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}
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[ -n "$pause" ] && {
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echo "Insert a disk in $device. Any information on the disk will be lost."
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echo -n "Press <Enter> to continue or ^C to abort: "
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read aline
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}
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[ -n "$verbose" ] && echo -n "Formatting $device... "
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mkdosfs -I $device > /dev/null || {
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echo "Failed to format $device" >&2
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exit 1
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}
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syslinux $device
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[ -n "$verbose" ] && echo "done."
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rm -rf $MOUNTDIR
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mkdir $MOUNTDIR || {
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echo "Failed to create $MOUNTDIR" >&2
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exit 1
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}
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[ -d $MOUNTDIR ] || {
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echo "$MOUNTDIR is not a directory!" >&2
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exit 1
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}
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mount -t vfat $device $MOUNTDIR || {
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rmdir $MOUNTDIR
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exit 1
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}
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[ -n "$verbose" ] && echo -n "Copying /boot/vmlinuz-$kernel... "
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cp -a /boot/vmlinuz-$kernel $MOUNTDIR/vmlinuz
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[ -n "$verbose" ] && echo "done."
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[ -n "$verbose" ] && echo -n "Creating initrd image... "
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/sbin/mkinitrd $mkinitrdargs $witheth --ifneeded $MOUNTDIR/initrd.img $kernel
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[ -n "$verbose" ] && echo "done."
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[ -n "$verbose" ] && echo -n "Setting up syslinux... "
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[ -f $MOUNTDIR/initrd.img ] && INITRDARG="initrd=initrd.img"
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if [ $(echo $rootdev | cut -b 6-9) = "loop" ]; then
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rootdev=$(ls -l $rootdev | sed 's/,//' | awk '{ printf("%02x%02x\n", $5, $6); }')
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fi
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cat > $MOUNTDIR/syslinux.cfg <<EOF
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default linux
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prompt 1
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display boot.msg
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timeout 100
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label linux
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kernel vmlinuz
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append $INITRDARG root=$rootdev
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EOF
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chmod 644 $MOUNTDIR/syslinux.cfg
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cat >> $MOUNTDIR/boot.msg <<EOF
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Press <return> (or wait 10 seconds) to boot your Red Hat Linux system from
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$rootdev. You may override the default linux kernel parameters by typing
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"linux <params>", followed by <return> if you like.
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EOF
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[ -n "$verbose" ] && echo "done."
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umount $MOUNTDIR
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rmdir $MOUNTDIR
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