Initscripts/Writing rc.d scripts

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Revision as of 23:13, 30 July 2011 by Andrwe (Talk | contribs) (Guideline: added description for some functions)

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As part of Arch's 'BSD-style' init, rc.d scripts are used to control the starting, stopping and restarting of daemons.

Guideline

  • Source Template:Filename, Template:Filename, and optionally Template:Filename.
  • Arguments and other daemon options should be placed in Template:Filename. This is done to separate configuration from logic and to keep a consistent style among daemon scripts.
  • Use functions in Template:Filename instead of duplicating their functionality.
  • Include at least start, stop and restart as arguments to the script.
  • There are some functions provided by Template:Filename:
    • stat_busy "<message>": set status busy for printed message (e.g. Starting daemon [BUSY])
    • stat_done: set status done (e.g. Starting daemon [DONE])
    • stat_fail: set status failed (e.g. Starting daemon [FAILED])
    • get_pid <program>: get PID of the program
    • ck_pidfile <PID-file> <program>: check whether PID-file is still valid for the program (e.g. ck_pidfile /var/run/daemon.pid daemon || rm -f /var/run/daemon.pid)
    • [add|rm]_daemon <program>: add/remove program to running daemons (stored in Template:Filename)

Example

The following is an example for crond. Look in Template:Filename for greater variety.

The configuration file: Template:File

The actual script: Template:File