Hash: Command line interpreter

Harsha Shell, is a command line interpreter written in C.

Features and Usage

Initially when the shell is started, only commands from the /bin/ directory can be run.

>hash ls -la

'>hash' is output after execution after each command.

User defined paths can be appended to the internal path variable.

>hash $PATH -a /usr/bin/
/usr/bin/

And yes, the trailing '/' is necessary. After execution of the above command use the commands from the new directory as before.

>hash wc hash.c
 145  317 3546 hash.c

Three built-in commands are provided:

• cd : can be used to change the working directory
• exit : exit from hash
• path : used to overwrite the path variable with a single path

>hash path " "
>hash ls
'ls' command not found in the current path.
Try adding the path of the command through: $PATH -a [path].

In the above test, path variable was cleared, and ls couldn't be found!!

Output from a command can be redirected to a desired file.

>hash ls > output

output file contains the result of ls.

Stuff to add

• Facility for batch processing
• run many commands in parallel