I am trying to Simulate a Linux shell, called MASH (for MiniAture SHell) in the C language but its not working can any one make it for me.

What does the simulation do exactly? What platforms does it target? If it is supposed to be a piece of software as sophisticated as say, GNU bash, it is unlikely that someone could just whip one up for you from scratch. The shell may just look like "$", but it is a pretty impressive program with a boatload of documentation that has been refined over a period of years.

Not trying to be a jerk... It sounds to me like it's a programming assignment. I ran across at least one class in college that assigned a program description such as:

Write a basic command interpreter.
The program should present the user with an opportunity to enter commands, process them, and wait for the next command.
Your program will need to parse the command line to determine the command and argument(s).
The commands that must be supported are:
etc.

So, there are three things I see that will prevent anyone from posting a "solution". First, it sounds like homework.

Second, nobody is receptive to "I can't do it, so do it for me" requests. If you want help, the traditional approach is to post the code you have, explain what's not working, and identify what's been tried to fix it.

Lastly, the foundation of any shell is simply a loop: read input from the user, parse, take appropriate action, get input from the user. It's not tough. That's not to say bash is simple, but it follows the same premise. The OP can always download the source code to bash and snoop around if ideas are needed.

I agree with Dark_Helmet, no one is going to do it for you, post up the relevant lines of code that are causing the errors, along with the errors, explain what you are trying to do and what you have done already to try and fix the problem - you will get a much more helpful response

This isn't the forum for posting something you want somebody to write for you. We will be happy to help you with any specific problems you have.