hi,
i'm trying to do a project to write a device driver for linux to implement a virtual cd device...this device driver will return the appropriate file from an iso image file present in the hard disk...an association wil be made b/n the iso file and the driver....
cd supported applications then wil not require a physical cd device to be present...

For this i need to retrieve files present in the image file.......
so i need to know abt iso file structure..........pls help me by suggesting measures or suggesting tutorials that wil give me a great deal of info abt iso file and file extraction from it......

Have a start at
http://en.wikipedia.org/wik

If I'm not completely mistaken, you not only posted this thread into two forums, but did it again (I'm fairly sure I read about this already some time ago, right?) Didn't you get answers last time, or why are you double-posting this a new time?
EDIT: seems like you only have two posts made, so I may be wrong (I'm sorry if that's the case). However a very similar thread was posted earlier, I'm sure of that. Very similar.

Last time somebody already suggested to take a look at mount and especially it's loop option, which lets mount iso images, which seems to be a great part of your project:

Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate.

Discussion continues here: https//www.linuxquestions.org/questions/showthread.php?t=585267