Learning how to avoid vulnerabilities while writing a file in C

The special care we will take in this recipe is that we will unlink all the links (if any) to the file that we are going to create. We will also ensure that our program does not overwrite any file if it already exists. 

How to do it...

Here are the steps to write a program to avoid vulnerabilities while creating a file in C:

1. A file pointer is defined.
2. The hacker might create a soft link and attach a sensitive file to the file that we want to create.
3. Remove the links from the file that you want to write in.
4. Open the file using the flags that check whether the file already exists or not. If the file exists, it should be overwritten.
5. Associate the file descriptor...