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 You need to run this script as root
  25 echo Usage: sudo $0 distro.iso /dev/sdX
  26 echo Example: sudo $0 foobar_5.0_i386.iso /dev/sdb
  27 echo
  28 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!
  29 echo ANOTHER WARNING!: This script can bite your dog. Use it with care, backup your data.
  30 exit 1
  31 }
  32
  33 [ $(id -u) != 0 ] && usage
  34 [ $# != 2 ] && usage
  35
  36 ISO=$1
  37 DEV=$2
  38 PERSISTENCESIZE=4096 # Size of the persistence file, in MB
  39
  40 ISOTMP=$(mktemp -d)
  41 DEVTMP=$(mktemp -d)
  42
  43 umount $DEV* || true
  44 mount -o loop $ISO $ISOTMP
  45
  46 # Create FAT32 LBA partition taking all disk
  47 echo 'start=2048, type=c' | sfdisk $DEV
  48 mkfs.vfat -I -F32 ${DEV}1 -n FSF-LIVE
  49
  50 # Copy the data
  51 mount ${DEV}1 $DEVTMP
  52 cp -vr $ISOTMP/* $ISOTMP/.disk $DEVTMP || true
  53
  54 cp -vr $DEVTMP/isolinux $DEVTMP/syslinux
  55 mv $DEVTMP/syslinux/isolinux.cfg $DEVTMP/syslinux/syslinux.cfg
  56
  57 # Create persistency file
  58 # dd if=/dev/zero of=$DEVTMP/casper-rw bs=1M count=$PERSISTENCESIZE oflag=sync status=progress
  59 # mkfs.ext4 -L casper-rw -F $DEVTMP/casper-rw
  60 # sed -i 's/noprompt --/noprompt persistent --/' $DEVTMP/syslinux/txt.cfg $DEVTMP/isolinux/txt.cfg
  61
  62 umount $DEVTMP
  63 umount $ISOTMP
  64
  65 rmdir $DEVTMP
  66 rmdir $ISOTMP
  67
  68 # Set up bootloader, requires syslinux 4x
  69 # https://mirror.fsf.org/trisquel/pool/main/s/syslinux/syslinux-common_4.05+dfsg-6+deb8u1_all.deb
  70 # https://mirror.fsf.org/trisquel/pool/main/s/syslinux/syslinux_4.05+dfsg-6+deb8u1_amd64.deb
  71 syslinux ${DEV}1
  72 dd conv=notrunc if=/usr/lib/syslinux/mbr.bin bs=440 count=1 of=$DEV
  73 parted $DEV set 1 boot on
  74
  75 eject $DEV
  76 sync
  77