rio (software)

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rio is the window system of the operating system Plan 9 .

Overview

Window in rio during plan 9 installation

Many features of rio implement basic concepts in Plan 9:

  • Each window runs in its own private namespace .
  • It exports a file system interface for running application programs which is the same one that rio has already received from the operating system. This allows rio to run in a rio window without any problems. By using 9P, rio is completely network transparent , although it does not contain any explicit network code.
  • Windows are treated like raw text that can also be edited.

A special feature is that the window management is transparent for the applications. This enables rio to run from within rio, or from within another window manager .

history

Rio is the youngest member of the numerous graphical user interfaces developed by Bell Labs , and thus in a certain sense a "descendant" of the X Window System (for Unix ).

In older versions of Plan 9, rio was called 8½.

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