Hi,
I am new to programming in C. I have to create a unix shell that can implement 1. basic commands such as ls, pwd, mkdir etc
2. can implement redirection
3. pipelining

Any help on where to start from or source codes will be appreciated
Thank You

You can look at bash source code, although being that you are a novice this may be hard to swallow.
There is little out there in terms of building your own shell (at least that I have seen) as it is a non-trivial process.
How long do you have and what is your background?

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Maybe start with "ash" from the Busybox project?


MxB

hey guys,
Thanks for the quick reply. I am familiar with a bit of UNIX but not at all with C or any other programming languages. I know the basic commands in UNIX. I did go through some source codes but they all went over my head. I checked some tutorials of C but still i could not get anything when i went through the source codes. This thing is killing me

Dont get discouraged; persistence pays off.
Start small by writing the main execution loop. Thats basically all a shell does is process input in a loop and hand functionality off to the proper executables. Scripting is a bit more involved, but lets leave that for now.
The main loop should look something like:
This is not C code, but can easily be converted. Get that working and you can start to move to parsing the input you got.

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