#!/bin/bash
#http://www.sysresccd.org/Sysresccd-manual-en_How_to_install_SystemRescueCd_on_an_USB-stick
VERSION=x86-3.7.0
#Figure out your USB drive my using "dmesg | tail".
USBSTICK=/dev/sd<my_USB_Stick>
ISODIR=/tmp/cdrom
ISOFILE=/vol/opt/SystemRescueCD/systemrescuecd-$VERSION.iso
set -e

echo  "Mounting SystemRescueCD ISO."
if [ ! -d $ISODIR ]; then
   sudo mkdir $ISODIR
fi
sudo mount -o loop -o exec $ISOFILE $ISODIR
cd $ISODIR
echo "Contents of SystemRescueCD ISO:"
ls

echo "Installing to USB stick . . . "
if [ ! -z `mount | grep $USBSTICK` ]; then
   sudo umount $USBSTICK  # in case of auto-mounting
fi
cd /tmp/cdrom
sudo bash ./usb_inst.sh #ncurses installer
cd -
echo "Wrote SystemRescueCD contents to USB stick." #delay!

sudo umount $ISODIR
sudo mount $USBSTICK /mnt
echo "Contents of new SystemRescueCD USB stick:"
ls
sudo umount /mnt
sync
echo "SystemRescueCD USB stick is ready to use."

# If usb_inst.sh is successful, it ends with 
#Success
#Installation successfully completed            │  
#
# Why usb_inst.sh may fail: 
#
#1. SystemRescueCD wants an empty partition table on its target USB drive.
#If SystemRescueCD fails by failing silently to copy files, 
#use fdisk to delete any existing partitions and try again.
#
#Afterwards:
#[alison@bonnet ~]$ sudo fdisk -l /dev/sdc
#Disk /dev/sdc: 8086 MB, 8086618112 bytes
#37 heads, 13 sectors/track, 32836 cylinders, total 15794176 sectors
#   Device Boot      Start         End      Blocks   Id  System
#/dev/sdc1   *           1    15794175     7897087+   c  W95 FAT32 (LBA)
#
#This partition is created by SystemRescueCD.   Do not create by hand!
#
#2. Do not mount the ISO on /mnt/, as that's where usb_inst.sh mounts the
#USB stick.   Instead mount the ISO on /tmp/cdrom.