Operating Systems Assignment 1

Usage :

Eg input:

./a.out input.txt output.txt symlink.txt

Eg output:

File Reversed Symlink Created : YES Symlink Verified : YES Directory Created File Created : YES Task 2.3.1 (Directory Permissions) : rwx --- --- Task 2.3.2 (File Permissions) : rw- --- --- Task 2.3.2 (Symlink Permissions) : rwx rwx rwx Task 2.4 DONE

Eg tree structure of current folder:

. ├── a.out ├── Assignment │   └── output.txt ├── input.txt ├── main.c ├── README.md └── symlink.txt -> Assignment/output.txt

Task 1 : Reverse the file

Given a file, you need to reverse the contents of that file and invert the case of each English character in the file and store the result in a new file within a new directory named “Assignment”. The file and directory thus created, can only be read/written by the user who created it.

Task 2:

Task 2.1:

Create a symlink to the above created file in “Assignment/.."”(Directory where the original file is present).

Task 2.2:

Task 2.2.1:

Verify the creation of the symlink.

Task 2.2.2:

Verify the creation of the new file and new directory created in the above part of question.

Task 2.3:

Check permissions for the three files mentioned in the above point.

Task 2.4:

Check if the file created is reversed and case-inverted version of the input file.