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