bin/live-new-uuid

   1 #!/bin/sh
   2 # -*- coding: utf-8 -*-
   3 #
   4 # «live-new-uuid» - Creates and injects new UUIDs for live disks
   5 #
   6 # Create new UUIDs for disks to prevent conflicts and booting the wrong live
   7 # directory.  Particularly useful in creating recovery disks that need to be
   8 # able to also work with recovery partitioning schemes.
   9 #
  10 # Copyright (C) 2008, Dell Inc.
  11 #
  12 # Author:
  13 #  - Mario Limonciello <Mario_Limonciello@Dell.com>
  14 #
  15 # This script is free software; you can redistribute it and/or modify it under
  16 # the terms of the GNU General Public License as published by the Free
  17 # Software Foundation; either version 2 of the License, or at your option)
  18 # any later version.
  19 #
  20 # This program is distributed in the hope that it will be useful,
  21 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 # GNU General Public License for more details.
  24 #
  25 # You should have received a copy of the GNU General Public License along
  26 # with this application; if not, write to the Free Software Foundation, Inc., 51
  27 # Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  28 ##################################################################################
  29
  30 set -e
  31
  32 help() {
  33  echo
  34  echo "USAGE: $0 initrd.gz <path-to-new-initrd.gz> <path-to-new-live-uuid> "
  35  echo
  36  echo "initrd.gz is the absolute path to the original gzipped initramfs"
  37  echo "<path-to-new-initrd.gz> is the destination directory for the new gzipped initramfs"
  38  echo "<path-to-new-live-uuid> is the destination directory for the new live-uuid-TYPE "
  39  echo
  40  echo "if either path is absent, they will end up in the current directory "
  41  echo "TYPE is determined by an already existing live-uuid-* or by 'uname -s'"
  42 }
  43
  44 if [ "$#" = "0" ] || [ "x$1" = x-h ] || [ "x$1" = x--help ]; then
  45         help
  46         exit 3
  47 fi
  48
  49 CWD=`pwd`
  50 TEMPDIR=`mktemp -d /tmp/uuid-XXXXXX`
  51 TYPE=`uname -r | cut -d '-' -f 3`
  52
  53 if [ -z "$2" ] || [ ! -d "$2" ] || [ "$2" = "." ]; then
  54         GZIPDIR="$CWD"
  55 else
  56         GZIPDIR="$2"
  57 fi
  58
  59 if [ -z "$3" ] || [ ! -d "$3" ] || [ "$3" = "." ]; then
  60         LIVEDIR="$CWD"
  61 else
  62         LIVEDIR="$3"
  63 fi
  64
  65 cd "$TEMPDIR"
  66 zcat "$1" | cpio -id
  67 uuidgen -r > conf/uuid.conf
  68 find . | cpio --quiet --dereference -o -H newc | gzip > "$GZIPDIR/initrd.gz"
  69 if [ "$(ls "$LIVEDIR/live-uuid"-* >/dev/null 2>&1 | wc -l)" = 1 ]; then
  70     cp conf/uuid.conf "$LIVEDIR/live-uuid"-*
  71 else
  72     cp conf/uuid.conf "$LIVEDIR/live-uuid-$TYPE"
  73 fi
  74 cd "$CWD"
  75 rm -rf "$TEMPDIR"