BuildingOperatingSystem.md

Getting Started on Building an Operating System using Vagrant (added credits)

Step 1:
If you don't have vagrant installed, then follow first 10 steps in README.
Step 2:
Using Git...
$cd "/d/vagrant"
$mkdir basic-os && cd basic-os
$vagrant box add lucid32 http://files.vagrantup.com/lucid32.box --- this is Ubuntu lucid32 image
It will take some hours to complete the installation...
Step 3:
After installation...
Open any code editor...
Copy-Paste this file into the editor and save it as Vagrantfile without any file extension in basic-os directory.
Step 4:
$vagrant up
It will take some minutes to complete (since it's first time to boot up lucid32)...
Step 5:
$cd "/d/[someother path]"
$git clone https://github.com/SamyPesse/How-to-Make-a-Computer-Operating-System.git
The src folder consists of kernel, disk-booting and user area.
Copy all files in src folder and paste it in basic-os directory.
Step 6:
$vagrant ssh
$cd /vagrant
$make all
$make run -- it can't run because the disk-image file in basic-os/sdk is corrupted.
Step 7:
Guess what? We successfully learnt how an operating system is made and built...
Keep that cloned-repo.
In that cloned-repo itself, the chapters will help in understanding the internal-build.
Now, delete those basic-os directory files (except Vagrantfile and .vagrant folder)
Keep lucid32 for future use...
LOL
$vagrant halt
$vagrant up
$vagrant provision

Adding Try-Attempts:-
After Step 5,
Goto basic-os/sdk directory, Delete the c disk image, diskimage.sh, qemu.sh
Create own disk image inorder to avoid file corruption.
Make sure that Git bash is running in admin mode.
$vagrant ssh
$cd /vagrant
We will create disk-image inside sdk directory.
$cd sdk
$qemu-img create c.img 2M
$fdisk ./c.img << EOF
x
c
4
h
16
s
63
r
n
p
1
1
4
a
1
w

$fdisk -l -u ./c.img

$losetup -o 32256 /dev/loop1 ./c.img --- Got Permission denied
$mke2fs /dev/loop1 --- Got Permission denied
$mount /dev/loop1 /mnt/ --- Got Permission denied
$cp -R bootdisk/* /mnt/ --- Got Permission denied
$umount /mnt/ --- Got Permission denied
If permission does not get denied, then a successfully disk image will be ready to run.
Installing GRUB on the disk:
$grub --device-map=/dev/null << EOF
>>device (hd0) ./c.img
>>geometry (hd0) 4 16 63
>>root (hd0,0)
>>setup (hd0)
>>quit
>>EOF

$losetup -d /dev/loop1 --- Got Permission denied
If permission is not denied, then GRUB will successfully boot.

$make run
The OS will run if it never received permission-denied in any commands.

~$exit
$vagrant halt

If failed, Go to Step 7.