| 释义 |
daemon, n. Computing.
Brit. |ˈdiːmən|, U.S. |ˈdim(ə)n|
Forms: 19– daemon, 19– demon
[Probably an extended use of demon n.1 (see forms s.v.), but also interpreted as an acronym ‹ the initial letters of either disk and execution monitor or device monitor.]
A program (or part of a program), esp. within a Unix system, which runs in the background without intervention by the user, either continuously or only when automatically activated by a particular event or condition.
A distinction is sometimes made between the form daemon, referring to a program on an operating system, and demon, referring to a portion of a program, but the forms seem generally to be used interchangeably, daemon being more usual.
1971A. Bhushan Request for Comments (Network Working Group) (Electronic text) No. 114. 2 The cooperating processes may be ‘daemon’ processes which ‘listen’ to agreed-upon sockets, and follow the initial connection protocol. 1983E. S. Raymond Hacker's Dict. 53 The printer daemon is just a program that is always running; it checks the special directory periodically, and whenever it finds a file there it prints it and then deletes it. 1989DesignCenter ii. 41/3 The file server runs a standard set of HP-UX system and network daemons. 1992New Scientist 18 Jan. 35/2 These programs, which could recognise simple patterns, were made up of several independent information-processing units, or ‘demons’, and a ‘master demon’. 2002N.Y. Times 7 Mar. d4/5 A mailer daemon installed on an e-mail system can respond to a piece of incorrectly addressed e-mail by generating an automated message to the sender that the message was undeliverable. |