live-usb-loader.sh

   1 #!/bin/bash
   2 #
   3 #    Copyright (C) 2012-2020  Ruben Rodriguez <ruben@trisquel.info>
   4 #    Copyright (C) 2020       Andrew Engelbrecht <andrew@fsf.org>
   5 #
   6 #    This program is free software; you can redistribute it and/or modify
   7 #    it under the terms of the GNU General Public License as published by
   8 #    the Free Software Foundation; either version 2 of the License, or
   9 #    (at your option) any later version.
  10 #
  11 #    This program is distributed in the hope that it will be useful,
  12 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 #    GNU General Public License for more details.
  15 #
  16 #    You should have received a copy of the GNU General Public License
  17 #    along with this program; if not, write to the Free Software
  18 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19 #
  20
  21 set -e
  22
  23 usage(){
  24 echo
  25 echo You need to run this script as root
  26 echo Usage: sudo $0 distro.iso /dev/sdX
  27 echo Example: sudo $0 trisquel_11.0-fsf_amd64.iso /dev/sdb
  28 echo
  29 echo WARNING!: this script will delete all data on the whole disk you pass as the second parameter. Make sure it is your USB drive and not your internal hard drive!
  30 echo ANOTHER WARNING!: This script can bite your dog. Use it with care, backup your data.
  31 echo
  32 exit 1
  33 }
  34
  35 [ $(id -u) != 0 ] && usage
  36 [ $# != 2 ] && usage
  37
  38 ISO=$1
  39 DEV=$2
  40 PERSISTENCESIZE=4096 # Size of the persistence file, in MB
  41
  42 ISOTMP=$(mktemp -d)
  43 DEVTMP=$(mktemp -d)
  44
  45 umount $DEV* || true
  46 mount -o loop $ISO $ISOTMP
  47
  48 # Create FAT32 LBA partition taking all disk
  49 echo 'start=2048, type=c' | sfdisk $DEV
  50 mkfs.vfat -I -F32 ${DEV}1 -n FSF-LIVE
  51
  52 # Copy the data
  53 mount ${DEV}1 $DEVTMP
  54 cp -vr $ISOTMP/* $ISOTMP/.disk $DEVTMP || true
  55
  56 cp -vr $DEVTMP/isolinux $DEVTMP/syslinux
  57 mv $DEVTMP/syslinux/isolinux.cfg $DEVTMP/syslinux/syslinux.cfg
  58
  59 # apparently running syslinux command when /syslinux/ and /isolinux/ both exist
  60 # leads to GRUB not detecting the isolinux directory.
  61 mv $DEVTMP/isolinux $DEVTMP/isolinux.bak
  62
  63 # Create persistency file
  64 # dd if=/dev/zero of=$DEVTMP/casper-rw bs=1M count=$PERSISTENCESIZE oflag=sync status=progress
  65 # mkfs.ext4 -L casper-rw -F $DEVTMP/casper-rw
  66 # sed -i 's/noprompt --/noprompt persistent --/' $DEVTMP/syslinux/txt.cfg $DEVTMP/isolinux/txt.cfg
  67
  68 umount $DEVTMP
  69 umount $ISOTMP
  70
  71 # Set up bootloader, requires syslinux. version 6.04 has been tested.
  72 syslinux --directory /syslinux/ --install ${DEV}1
  73 sudo dd if=/usr/lib/SYSLINUX/mbr.bin of=${DEV}
  74 parted $DEV set 1 boot on
  75
  76 mount ${DEV}1 $DEVTMP
  77 mv $DEVTMP/isolinux.bak $DEVTMP/isolinux
  78 umount $DEVTMP
  79
  80 rmdir $DEVTMP
  81 rmdir $ISOTMP
  82
  83 #eject $DEV
  84 sync
  85