The program traverses the directories and look for files or directories that are duplicates of each other (i.e. identical). The full pathnames of duplicates will be printed as output.
The program can be invoked with the following options and arguments:
identic [-f | -d ] [-c] [-n] [-s] [<dir1> < dir2> ..]
[-f | -d ] -f means look for identical files, -d means look for identical
directories. The default is identical files.
-c Identical will mean the contents are exactly the same (note
that the names can be different).
-n Identical will mean the directory/file names are exactly the
same (note that the contents can be different).
-cn Identical will mean both the contents and the directory/file
names are exactly the same.
[<dir1> <dir2> ..] The list of directories to traverse (note that the directories
will be traversed recursively, i.e. directories and their
subdirectories and their subdirectories etc. etc.). The
default is current directory.
-s The size for each duplicate will also be printed. The
duplicates should be printed in descending order of size.
This option is ignored when –n option is used.
It is assumed that directory hierarchy forms a tree. It is assumed there are no symbolic links.
• The program uses sha256 hashes in order to locate identical items.
• To locate identical directories, hash trees are used.
Developed for CMPE 230 SYSTEMS PROGRAMMING course, Bogazici University Computer Engineering, Spring 2020.