I found this in a man page for ls in solaris linux.


What does it mean when it says:

D the entry is a door?

  • 4
    Wikipedia is your friend Doors_(computing) Doors are an inter-process communication facility for Unix computer systems. They provide a form of procedure call. – HBruijn Apr 29 '14 at 11:28
  • 4
    They also allow for a killer interview question for Solaris admins: When is a door not a door? When it's a jar. – Matt Apr 29 '14 at 11:39

A door is a special file in Solaris for bidirectional communication between processes (IPC). Doors provide client processes with a way to call remote code in a server process and fetch the result.

As @HBrujin stated, the Wikipedia article is a good entry point to doors (if that makes sense to you).

As explained by ls man page, doors are identified by the letter D in ls output.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.