emacs - elisp中如何确定操作系统？

Question

如何以编程方式确定 ELisp 中运行 Emacs 的操作系统？

我想根据操作系统在 .emacs 中运行不同的代码。

Answer 1

系统类型变量:

system-type is a variable defined in `C source code'.
Its value is darwin

Documentation:
Value is symbol indicating type of operating system you are using.
Special values:
  `gnu'         compiled for a GNU Hurd system.
  `gnu/linux'   compiled for a GNU/Linux system.
  `darwin'      compiled for Darwin (GNU-Darwin, Mac OS X, ...).
  `ms-dos'      compiled as an MS-DOS application.
  `windows-nt'  compiled as a native W32 application.
  `cygwin'      compiled using the Cygwin library.
Anything else indicates some sort of Unix system.