18 lines
1.1 KiB
Org Mode
18 lines
1.1 KiB
Org Mode
#+title: arsh - ARchaic SHell
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Since I started using GNU/Linux, I always wondered, how do shells work and what exactly are they responsible for.
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In order to learn it (and also to learn some C) I decided to make a simple shell for UNIX-like systems in C and try to implement some of the features, that other shells like bash, zsh, fish, etc have. And also I wanted to have the whole source code in a single ~.c~ file, that uses no external dependencies, other than the standard C library.
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* Features
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Some of the implemented features are:
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- You can pipe stdout of one command to stdin of another (ex. ~cat main.c | wc --lines~)
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- You can redirrect output/input with ~>~, ~>>~, ~<~, ~2>~, ~&>~
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- Variables expansion with ~$PATH~ and ~${HOME}~ syntax
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- Shows custom prompt, if ~PS1~ env variable is set
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- Run subcomands with ~$(hostname)~ or ~`pwd`~ (works with pipes)
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- Custom ~readline~ function with support for cursor moving (<-, ->) and inline editing
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- Run the shell in interactive and non interactive mode
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* Source code
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[[https://git.kylekrein.com/kylekrein/arsh][Forgejo]]
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