PyShell

Command line interpreter implemented in Python.

Supported commands

Built-in commands

• bg
• cd [dir]
• pwd
• time command
• clr
• dir [dir]
• environ
• echo [comment]
• help
• quit
• fg
• jobs
• set var val
• shift
• test
• umask [mask]
• unset var

Use help for more detail.

Program execution from the shell is supported without doubt.

Features

Redirection (works only for built-in commands)

echo hello > hello.txt

Pipeline

cat shell.py | wc

Background execution

sleep 10 & sleep 5 &

Batchfile

python shell.py BATCHFILE