This project is all about creating a simplified shell program that can run binaries, have a working history, builtins functionality like echo or export and more.

Shell capabilities:

• Have a working History with saving after reboot.
• Search and launch the right executable (based on the PATH variable or by using relative or absolute path)
• Implements the builtins:
  • echo with option -n
  • cd with only a relative or absolute path
  • pwd with no options
  • export with no options
  • unset with no options
  • env with no options or arguments
  • exit with no options
• ' inhibits all interpretation of a sequence of characters.
• " inhibits all interpretation of a sequence of characters except for $.
• Redirections:
  • "<" redirect input.
  • ">" redirect output.
  • "<<" read input from the current source until a line containing only the delimiter is seen.
  • ">>" redirect output with append mode.
• Pipes | the output of each command in the pipeline is connected via a pipe to the input of the next command.
• Environment variables ($ followed by characters) expands to their values.
• $? expands to the exit status of the most recently executed foreground pipeline.
• ctrl-C ctrl-D ctrl-\ works like in bash.
• When interactive:
  • ctrl-C print a new prompt on a newline.
  • ctrl-D exit the shell.
  • ctrl-\ do nothing.

All functions are created in accordance with Norm - the bunch of rules how code should be formatted.

• Not interpret unclosed quotes or unspecified special characters like \ or ;.
• Show a prompt when waiting for a new command.

Project requires:

• Readline library
• C Lang compiler: gcc or clang
• Possibility to work with Makefile

Tested on:

• MacOS 10.15
• Linux Ubuntu 20.04

Run:

$> make install && make
$> ./minishell
42minishell $> echo "Hello world!"
Hello world!

• make / make all / make minishell - compile project
• make srcs/*.o - compile specific source file
• make clean - clean all object files
• make fclean - clean all object files & library
• make norminette - check that all functions are created in accordance with Norm (you need to have norminette)
• make install - install readline library (you need to have Homebrew)