Marcel the Shell (with shoes on)

Practice shell implementation

Name is a reference to this video

What's done:

Command execution
Pipes
Readline/history support
Builtin functions (cd, exit)
Dynamic prompt (changes to reflect exit code of previous command and current directory)
IO redirection (stdin, stdout, stderr)
Sane lexing + parsing (via flex and bison)
- Supports quoted strings
Proper job control
Safe signal handling via queueing
Setting environment variables per command

What isn't:

Set local variables
Set environment variables for entire session (e.g. export)
Escape sequences
Defining aliases/functions
Anything else not mentioned in the above section