minishell

About

minishell is a simple shell program that implements the minimum functionality of bash.
Using the C programmming language.

Building and Running

git clone "URL"
cd minishell
make
./minishell

Description

• Special characters to be interpreted:
  • quotes : '', ""
  • pipe : |
  • redirect and heredocument : <, <<, >, >>
• Implemented 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
• Environment variables ($ followed by characters) expand to their values.
• $? expand to the exit status of the most recently executed foreground pipeline.
• ctrl-C ctrl-D ctrl-\ work like in bash.
• When interactive:
  • ctrl-C print a new prompt on a newline
  • ctrl-D exit the shell
  • ctrl-\ do nothing

For more information

• rsudo's Hatena Blog: bash再実装課題の振り返り
• rakiyama's Hatena Blog: シェルの再実装しましたというお話。