Write A Program In Python/C++ To Make USB Device Bootable by Installing Required System Files.

============ Python Program ============

12345678910111213141516171819import commands

print "\nCREATING A BOOTABLE USB\n";

print "\nSTEP 1: UNMOUNTING THE DEVICE\n"

print commands.getoutput("umount /dev/sdb*")

print commands.getoutput("echo y | mkfs /dev/sdb")

print "\nSTEP 3: MODIFY 1st SECTOR OF DEVICE\n"

print commands.getoutput("dd if=boot_sect.bin of=/dev/sdb bs=512 count=1")

print "\nSTEP 4: CREATING THE FILE SYSTEM\n"

print commands.getoutput("echo n p \"\n\n\n\n\n\" w | fdisk /dev/sdb")

print "\nDONE\n"

============ OUTPUT ============

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182[root@localhost ~]# python pythonbootable.py

CREATING A BOOTABLE USB

STEP 1: UNMOUNTING THE DEVICE

mke2fs 1.42.7 (21-Jan-2013) 

/dev/sdb is entire device, not just one partition! 

Proceed anyway? (y,n) Filesystem label= 

OS type: Linux 

Block size=4096 (log=2) 

Fragment size=4096 (log=2) 

Stride=0 blocks, Stripe width=0 blocks 

977280 inodes, 3908352 blocks 

195417 blocks (5.00%) reserved for the super user 

First data block=0 

Maximum filesystem blocks=4005560320 

120 block groups 

32768 blocks per group, 32768 fragments per group 

8144 inodes per group 

Superblock backups stored on blocks: 

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208 

Allocating group tables: done 

Writing inode tables: done       

Writing superblocks and filesystem accounting information: done   

STEP 3: MODIFY 1st SECTOR OF DEVICE 

dd: failed to open ‘boot_sect.bin’: No such file or directory 

STEP 4: CREATING THE FILE SYSTEM 

Welcome to fdisk (util-linux 2.23.1). 

Changes will remain in memory only, until you decide to write them. 

Be careful before using the write command. 

Device does not contain a recognized partition table 

Building a new DOS disklabel with disk identifier 0xa883a4db. 

Command (m for help): Partition type: 

p   primary (0 primary, 0 extended, 4 free) 

e   extended 

Select (default p): Using default response p 

Partition number (1-4, default 1): First sector (2048-31266815, default 2048): Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-31266815, default 31266815): Using default value 31266815 

Partition 1 of type Linux and of size 14.9 GiB is set 

Command (m for help): The partition table has been altered! 

Calling ioctl() to re-read partition table. 

Syncing disks. 

DONE