lush

Shell is a program that takes what you input on the keyboard and gives them to the OS to perform. The Linux OS have System Calls, but they should be called through GNU C Library. Shell can provide a convenient way to call the System Calls.

lush is a simple implemention of shell.

Linux下Shell终端的简易实现

实现一个Shell，需要实现的功能有：

• IO交互，以更好的方式读取标准输入，以合适的时机标准输出
• 解析输入的数据
• 调用操作系统API实现基本功能
• 执行自己实现的功能
• 处理中断、异常

Add more to lush

add DIY commands to builtin.c/h

Compile

$ gcc main.c builtin.c -o lush

Run

$ ./lush

Reference

Advanced Programming in the UNIX Environment

starter

getch()

handle backspace

handle arrow-key

key code