Shell script for formatting the SD card

--------------------

The script is first extended and then formatted. One fat extension and one ext3 Partition

-------------------

#! /Bin/sh
#
# Partition and format the SD card script
# Usage mksdboot. Sh -- device/dev/SDB

Version = "0.1"

Execute ()
{
$ *>/Dev/null
If [$? -Ne 0]; then
Echo
Echo "error: executing $ *"
Echo
Exit 1
Fi
}

Version ()
{
Echo
Echo "'basename $ 1' version $ version"
Echo

Exit 0
}

Usage ()
{
Echo"
Usage: 'basename $ 1' <Options> [files for install partition]

Mandatory options:
-- Device SD block device node (e. g/dev/SDD)

Optional options:
-- Version print version.
-- Help print this help message.
"
Exit 1
}

# Process command line...
While [$ #-GT 0]; do
Case $1 in
-- Help |-h)
Usage $0
;;
-- Device) shift; device = $1; shift ;;;
-- Version) version $0 ;;
*) Copy = "$ copy $1"; shift ;;;
Esac
Done

Test-Z $ Device & Usage $0

 
If [! -B $ device]; then
Echo "error: $ device is not a block Device File"
Exit 1;
Fi

Echo "************************************** **********************"
Echo "* This will delete all the data on $ device *"
Echo "**"
Echo "* warning! Make sure your computer does not go *"
Echo "* in to idle mode while this script is *"
Echo "* running. The script will complete ,*"
Echo "* but your SD card may be too upted .*"
Echo "**"
Echo "* press <enter> to confirm ....*"
Echo "************************************** **********************"
Read junk

For I in 'LS-1 $ device? '; Do
Echo "unmounting device '$ I '"
Umount $ I 2>/dev/null
Done

Execute "dd If =/dev/Zero of = $ device BS = 1024 COUNT = 1024"

# Get the partition information.
Total_size = 'fdisk-L $ device | grep disk | awk '{print $5 }''
Total_cyln = 'echo $ total_size/255/63/512 | bc'

# Default number of cylinder for first parition
PC1 = 5

# Calculate Number of cylinder for the second parition
If ["$ copy "! = ""]; Then
# Installer on one 4 gb sd card.
PC2 = 110
# PC2 = $ ($ total_cyln-$ pC1)/2 ))
Fi

{
Echo, $ pC1, 0x0c ,*
If ["$ PC2 "! = ""]; Then
Echo, $ PC2 ,,-
Echo ,,,-
Else
Echo ,,,-
Fi
} | Sfdisk-D-H 255-s 63-C $ total_cyln $ Device

If [$? -Ne 0]; then
Echo Error
Exit 1;
Fi

Echo "formating $ {Device} 1 ..."
Execute "mkfs. vfat-F 32-n" Boot "$ {Device} 1"
Echo "formating $ {Device} 2 ..."
Execute "mkfs. ext3-J-L" rootfs "$ {Device} 2"
If ["$ PC2 "! = ""]; Then
Echo "formating $ {Device} 3 ..."
Execute "mkfs. ext3-J-L" start_here "$ {Device} 3"
Fi

Echo "completed! "