Provided Source Code
As a starting point for this project we are given the following source code.
diskSimulator.c/h
contain C functions to simulate the operation of the device driver to read and write disk blocks given an LBA-style index. The disk itself is simulated by a 2-dimensional array of bytes (C type uint8_t) The disk has 256 blocks, each with 1024 bytes (so each block can be indexed by a single byte, also uint8_t). There are also routines that can read and write the array, simulating the block management on the disk. For debugging, there is also a routine that prints the 1k bytes of a block to the screen (16 rows of 16 2-digit hex numbers, similar to the Unix command od).
Makefile
Makefile is a standard Unix make file to compile all the source files and make an executable called cpmRun.
cpmfsys.h
This file contains function and data structure declarations you will need to implement the filesystem. For this assignment you will implement the functions listed below. The detailed specification of each function and a prototype for it is to be found in the comments of the cpmfsys.h file.
- mkDirStruct
- writeDirStruct
- makeFreeList
- printFreeList
- checkLegalName
- findExtentWithName
- cpmDir
- cpmDelete
- cpmRename
image1.img
This is a disk image file to be used in testing your functions
fsysdriver.c
implements main() to test your functions. The driver program reads the image file as its starting point (see previous item in this list), and should produce output as shown in the similarly named output file (see next item in this list).
sampleOutput.txt
text file showing the output on the console you should see after running the main() routine from the previous driver.
Note: The remaining functions with prototypes in cpmfsys.h may be implemented in a future assignment. If you intend to further improve your programming skills, you may implement these remaining functions as an optional task.