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62 lines
2.0 KiB
62 lines
2.0 KiB
18 years ago
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Because OpenWrt uses its own init script system, all init scripts must be installed
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as \texttt{/etc/init.d/\textit{name}} use \texttt{/etc/rc.common} as a wrapper.
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Example: \texttt{/etc/init.d/httpd}
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\begin{Verbatim}
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#!/bin/sh /etc/rc.common
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# Copyright (C) 2006 OpenWrt.org
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START=50
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start() {
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[ -d /www ] && httpd -p 80 -h /www -r OpenWrt
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}
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stop() {
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killall httpd
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}
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\end{Verbatim}
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as you can see, the script does not actually parse the command line arguments itself.
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This is done by the wrapper script \texttt{/etc/rc.common}.
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\texttt{start()} and \texttt{stop()} are the basic functions, which almost any init
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script should provide. \texttt{start()} is called when the user runs \texttt{/etc/init.d/httpd start}
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or (if the script is enabled and does not override this behavior) at system boot time.
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Enabling and disabling init scripts is done by running \texttt{/etc/init.d/\textit{name} start}
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or \texttt{/etc/init.d/\textit{name} stop}. This creates or removes symbolic links to the
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init script in \texttt{/etc/rc.d}, which is processed by \texttt{/etc/init.d/rcS} at boot time.
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The order in which these scripts are run is defined in the variable \texttt{START} in the init
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script, which is optional and defaults to \texttt{50}. Changing it requires running
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\texttt{/etc/init.d/\textit{name} enable} again.
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You can also override these standard init script functions:
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\begin{itemize}
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\item \texttt{boot()} \\
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Commands to be run at boot time. Defaults to \texttt{start()}
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\item \texttt{restart()} \\
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Restart your service. Defaults to \texttt{stop(); start()}
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\item \texttt{reload()} \\
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Reload the configuration files for your service. Defaults to \texttt{restart()}
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\end{itemize}
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You can also add custom commands by creating the appropriate functions and referencing them
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in the \texttt{EXTRA\_COMMANDS} variable. Helptext is added in \texttt{EXTRA\_HELP}.
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Example:
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\begin{Verbatim}
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status() {
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# print the status info
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}
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EXTRA_COMMANDS="status"
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EXTRA_HELP=" status Print the status of the service"
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\end{Verbatim}
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