This lab involved testing various attributes of virtual file system images in the FAT16 format. Each aspect of a FAT16 file system is convered in a different test parameter when running the program.
- dejagnu for
runtest
sudo apt install dejagnu
To build the fs executable:
$ make$ ./fs --image <image> --<optional test parameter>
The program takes in the required argument --image, which takes in an image file and loads it into memory with mmap().
The --test-mmap optional argument reads in a size and location from stdin and prints out the byte at that location in a specific size.
The --test-boot-sector optional argument prints out image information based on FAT16 boot sector headers.
The --test-directory-entry optional argument prints out the specified root directory entry information.
The --test-file-clusters optional argument prints out the linked list of clusters associated with the specified file entry.
The --test-file-name optional argument searches the image for a specified filename and prints out the file entry information.
The --test-file-contents optional argument searches the image for a specifed filename and prints out the file contents.
The --test-num-entries optional argument searches the file system for the number of files and directories.
The --test-space-usage optional argument calculates the space usage statistics for the given file system.
The --test-largest-file optional argument searches the file system for the largest file and the path to the file.
The --test-cookie optional argument searches all of the files in the file system for a particular string.
The --test-num-dir-levels optional argument searches the file system for the deepest level of subdirectories.
The --test-oldest-file optional argument searches the file system for the oldest file.
The --output-fs-data optional argument prints out the results of the previous 6 parameters.
The --write-fs-data optional argument is supposed to write out the contents of --output-fs-data to a file and place it in the given image. Currently, the program with this argument does not actually do anything.
$ runtest --tool=fs <optional specified test files>
Currently, there are 1006 passes out of 1052 tests because some test parameters are not implemented yet.
It takes about 2 minutes to run the entire test suite.
Only one optional argument may be used at a time.