mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-25 20:51:55 +00:00
166 lines
4.5 KiB
Bash
Executable File
166 lines
4.5 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# $Id$
|
|
# initrd builder for network booting
|
|
|
|
# Utility function to determine whether or not a filesystem is usable for
|
|
# loopback mounts. Lifted verbatim from Erik Troan's mkinitrd script.
|
|
#
|
|
is_good_fs() {
|
|
local parttype= tmpname=
|
|
local dir=$1
|
|
[[ -d $dir ]] || return 1
|
|
[[ -w $dir ]] || return 1
|
|
[[ $dir == */ ]] && dir=${dir%/}
|
|
parttype=$(awk "{if (\$2 == \""$dir"\") print \$3 }" /proc/mounts)
|
|
|
|
while tmpname=${dir%/*} && [[ -z $parttype ]];do
|
|
[[ -z $tmpname ]] && tmpname=/
|
|
parttype=$(awk "{if (\$2 == \""$tmpname"\") print \$3 }" /proc/mounts)
|
|
dir=$tmpname
|
|
done
|
|
|
|
case $parttype in
|
|
nfs|tmpfs) return 1;;
|
|
*) return 0;
|
|
esac
|
|
}
|
|
|
|
# Find a suitable temporary directory (i.e. not tmpfs or nfs)
|
|
if is_good_fs $TMPDIR; then
|
|
tmpdir=$TMPDIR
|
|
elif is_good_fs /tmp; then
|
|
tmpdir=/tmp
|
|
elif is_good_fs /var/tmp; then
|
|
tmpdir=/var/tmp
|
|
elif is_good_fs /root/tmp; then
|
|
tmpdir=/root/tmp
|
|
else
|
|
echo "Cannot use a tmp directory" >&2
|
|
exit 1
|
|
fi
|
|
|
|
# Default settings (some can be overridden by command-line options)
|
|
include_modules=include-modules
|
|
initrd_skel=/usr/lib/mkinitrd-net/initrd-skel
|
|
kernel_ver=`uname -r`
|
|
use_sudo=y
|
|
keep=n
|
|
output_dir=/var/lib/tftpboot
|
|
make_link=y
|
|
quiet=
|
|
|
|
# No need to use sudo if we are root
|
|
if [ $UID -eq 0 ]; then
|
|
use_sudo=n
|
|
fi
|
|
|
|
USAGE="Usage: $0 [-k|--kernel <kernel_ver>] [-n|--nolink] [-q|--quiet] [-l|--local] [--nosudo] [--keep] [--help] module_list ..."
|
|
|
|
# Parse command-line options
|
|
while [ $# -gt 0 ]; do
|
|
case "$1" in
|
|
-l|--local)
|
|
shift
|
|
use_local=y ;;
|
|
-k|--kernel)
|
|
shift
|
|
kernel_ver=$1
|
|
shift ;;
|
|
--nosudo) shift ; use_sudo=n ;;
|
|
--keep) shift ; keep=y ;;
|
|
--n|--nolink)
|
|
shift ; make_link=n ;;
|
|
-q|--quiet) shift ; quiet=-q ;;
|
|
--help) shift ; do_help=y ;;
|
|
--) shift ; break ;;
|
|
-*) echo "${0}: ${1}: invalid option" >&2
|
|
echo $USAGE >& 2
|
|
exit 2 ;;
|
|
*) break ;;
|
|
esac
|
|
done
|
|
|
|
# Build list of requested modules
|
|
modules="$*"
|
|
requested_modules="$modules"
|
|
modules="$modules nfs" # Always require nfs for nfs mount
|
|
modules="$modules af_packet" # Always require af_packet for udhcpc
|
|
|
|
# --help => Print help message
|
|
if [ "$do_help" == "y" ]; then
|
|
echo $USAGE
|
|
echo " -k, --kernel Specify kernel version"
|
|
echo " -n, --nolink Do not create a matching symbolic link"
|
|
echo " -l, --local Run locally from CVS (for developers only)"
|
|
echo " --nosudo Do not use sudo (i.e. must run as root instead)"
|
|
echo " --keep Keep temporary files instead of deleting them"
|
|
exit 0;
|
|
fi
|
|
|
|
# --local => we are running directly from CVS, rather than
|
|
# from an installed copy, so use local files and directories
|
|
if [ "$use_local" == "y" ]; then
|
|
include_modules=./include-modules
|
|
initrd_skel=initrd-skel
|
|
output_dir=tftpboot
|
|
fi
|
|
|
|
# If use_sudo is set, check that sudo exists
|
|
sudo=/usr/bin/sudo
|
|
if [ "$use_sudo" == "y" ]; then
|
|
if [ ! -x $sudo ]; then
|
|
use_sudo=n
|
|
echo "WARNING: --nosudo not specified but $sudo not found"
|
|
fi
|
|
fi
|
|
if [ "$use_sudo" == "n" ]; then
|
|
sudo=
|
|
fi
|
|
|
|
# Create temporary working files
|
|
initrd=`mktemp -d ${tmpdir}/initrd.XXXXXX`
|
|
initrdimg=`mktemp ${tmpdir}/initrd.img.XXXXXX`
|
|
initrdmnt=`mktemp -d ${tmpdir}/initrd.mnt.XXXXXX`
|
|
|
|
# Copy skeleton into temporary area
|
|
cp -a $initrd_skel/* $initrd/
|
|
mkdir -p $initrd/lib/modules/$kernel_ver
|
|
$include_modules $quiet -k $kernel_ver -d $initrd/lib/modules/$kernel_ver $modules > $initrd/bin/insert-modules || exit 1
|
|
chmod 755 $initrd/bin/insert-modules
|
|
|
|
# Create empty ext2fs image file
|
|
dd if=/dev/zero bs=1k of=$initrdimg count=$((`du -sk $initrd | cut -f1` * 7 / 6)) 2> /dev/null
|
|
/sbin/mke2fs -q -F $initrdimg 2> /dev/null
|
|
|
|
# Mount image file, copy files on, create /dev entries, display free space, umount
|
|
$sudo mount -o loop $initrdimg $initrdmnt
|
|
cp -a $initrd/* $initrdmnt/
|
|
$sudo mknod $initrdmnt/dev/console c 5 1
|
|
$sudo mknod $initrdmnt/dev/null c 1 3
|
|
$sudo mknod $initrdmnt/dev/ram b 1 1
|
|
$sudo mknod $initrdmnt/dev/systty c 4 0
|
|
for i in 1 2 3 4; do $sudo mknod $initrdmnt/dev/tty$i c 4 $i; done
|
|
if [ "$quiet" == "n" ]; then
|
|
df -h $initrdmnt
|
|
fi
|
|
$sudo umount $initrdmnt
|
|
|
|
# Create output file
|
|
initrd_suffix=`echo $requested_modules | tr " " .`
|
|
gzip -9 -n -c $initrdimg > $output_dir/initrd-$initrd_suffix.$kernel_ver.img
|
|
|
|
# Create symlink
|
|
if [ "$make_link" == "y" ]; then
|
|
link=$output_dir/initrd-$initrd_suffix.img
|
|
[ -L $link ] && rm -f $link
|
|
ln -s initrd-$initrd_suffix.$kernel_ver.img $link
|
|
fi
|
|
|
|
# Remove temporary files
|
|
if [ "$keep" == "n" ]; then
|
|
rm -rf $initrd
|
|
rm -f $initrdimg
|
|
rmdir $initrdmnt
|
|
fi
|