#README for ush parser and Micro shell (ush).

Vincent W. Freeh

This a parser for a csh-like syntax. It is to be used for the ush shell project.

There are five files:

. README this file . Makefile . main.c driver program that reads and prints commands . parse.c define parsing function and other support functions . parse.h

To use in your program, you must include parse.h and call the function parse(), which return a Pipe data structure. (See main.c) The Pipe contains all the information in a line of input to a shell.

Dinesh Prasanth M K

This Micro shell (ush) has following built-in commands:

• cd
• where
• echo
• nice
• logout
• pwd
• setenv
• unsetenv

supports:

• redirection (>, >&, >>, >>&)
• supports multi pipe commands including stderr redirect (|, |&)

Running

	make
	./ush
	{yourhost}% [start typing commands]