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README.md

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TODO:

  • Handle ’ (single quote) which should prevent the shell from interpreting the meta- characters in the quoted sequence.
  • Handle " (double quote) which should prevent the shell from interpreting the meta- characters in the quoted sequence except for $ (dollar sign).
  • << should be given a delimiter, then read the input until a line containing the delimiter is seen. However, it doesn’t have to update the history!

BUGS:

Redirection & Appender

➜ >> a cat LICENSE.md
Command not found!
➜ cat >> a LICENSE.md
➜ cat > a LICENSE.md

ENV var

➜  minishell git:(main) ✗ unset truc
➜  minishell git:(main) ✗ 12=machin
➜  minishell git:(main) ✗ echo $&é
[1] 6602
$
[1]  + 6602 done       echo $
zsh: command not found: é
➜  minishell git:(main) ✗ echo $12
machin
➜  minishell git:(main) ✗ export 12
export: not an identifier: 12
➜  minishell git:(main) ✗ unset 12
➜  minishell git:(main) ✗ test=aaa
➜  minishell git:(main) ✗ echo %test%
%test%
➜  minishell git:(main) ✗ echo %HOME%
%HOME%
➜  minishell git:(main) ✗ export 12=machin
export: not an identifier: 12
➜  minishell git:(main) ✗ echo $12
machin
➜  minishell git:(main) ✗ unset 12
➜  minishell git:(main) ✗

IN PROGRESS:

DONE

  • Implement pipes (| character). The output of each command in the pipeline is connected to the input of the next command via a pipe.
  • Handle $? which should expand to the exit status of the most recently executed foreground pipeline.
  • < should redirect input.
  • Display a prompt when waiting for a new command.
  • Have a working history.
  • Search and launch the right executable (based on the PATH variable or using a relative or an absolute path).
  • Not use more than one global variable. Think about it. You will have to explain its purpose. (I used it in controls/controls_handler.c)
  • Handle ctrl-C, ctrl-D and ctrl-\ which should behave like in bash.
    • In interactive mode:
    • ctrl-C displays a new prompt on a new line.
    • ctrl-D exits the shell.
    • ctrl-\ does nothing.
  • echo with option -n
  • cd with only a relative or absolute path
  • pwd with no options
  • exit with no options
  • Handle environment variables ($ followed by a sequence of characters) which should expand to their values.
  • Not interpret unclosed quotes or special characters which are not required by the subject such as \ (backslash) or ; (semicolon).
  • Parser don't support duplicated commands in a single line. (example: cat License.md && cat License.txt)
  • export with no options
  • unset with no options
  • env with no options or arguments
  • FIX cd command, it doesn't work properly, example:
➜ cd /var/www
➜ pwd
/var/www/
➜ cd .git
➜ pwd
.git/
  • >> should redirect output in append mode.
  • > should redirect output.