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<HTML>
<HEAD>
<TITLE>runsv(8) manual page</TITLE>
</HEAD>
<BODY bgcolor=white>
<a href="http://smarden.org/pape/">G. Pape</a><br><A HREF="index.html">runit</A><hr><P>
<H2><A NAME="sect0">Name</A></H2>
runsv - starts and monitors a service and optionally an appendant log
service
<H2><A NAME="sect1">Synopsis</A></H2>
<B>runsv</B> <I>service</I>
<H2><A NAME="sect2">Description</A></H2>
<I>service</I> must be a directory. <P>
<B>runsv</B>
switches to the directory <I>service</I> and starts ./run. if ./run exits and ./finish
exists, <B>runsv</B> starts ./finish. If ./finish doesn't exist or ./finish exits,
<B>runsv</B> restarts ./run. <P>
If ./run or ./finish exit immediatly, <B>runsv</B> waits a second
before starting ./finish or restarting ./run. <P>
If the file <I>service</I>/down exists,
<B>runsv</B> does not start ./run immediately. The control interface (see below)
can be used to start the service and to give other commands to <B>runsv</B>. <P>
If
the directory <I>service</I>/log exists, <B>runsv</B> creates a pipe, redirects <I>service</I>/run's
and <I>service</I>/finish's standard output to the pipe, switches to the directory
<I>service</I>/log and starts ./run (and ./finish) exactly as described above for
the <I>service</I> directory. The standard input of the log service a redirected
to read from the pipe. <P>
<B>runsv</B> maintains status information in a binary format
compatible to <B><I>supervise</B>(8)</I> in <I>service</I>/supervise/status and <I>service</I>/log/supervise/status,
and in a human-readable format in <I>service</I>/supervise/stat, <I>service</I>/log/supervise/stat,
<I>service</I>/supervise/pid, <I>service</I>/log/supervise/pid.
<H2><A NAME="sect3">Control</A></H2>
The named pipes
<I>service</I>/supervise/control, and (optionally) <I>service</I>/log/supervise/control
are provided to give commands to <B>runsv</B>. You can use <B><I>svc</B>(8)</I> to control the
service or just write one of the following characters to the named pipe:
<DL>
<DT><B>u</B> </DT>
<DD>Up. If the service is not running, start it. If the service stops, restart
it. </DD>
<DT><B>d</B> </DT>
<DD>Down. If the service is running, send it a TERM signal. If ./run exits,
start ./finish if it exists. After it stops, do not restart service. </DD>
<DT><B>o</B> </DT>
<DD>Once.
If the service is not running, start it. Do not restart it if it stops. </DD>
<DT><B>p</B>
</DT>
<DD>Pause. If the service is running, send it a STOP signal. </DD>
<DT><B>c</B> </DT>
<DD>Continue. If the
service is running, send it a CONT signal. </DD>
<DT><B>h</B> </DT>
<DD>Hangup. If the service is running,
send it a HUP signal. </DD>
<DT><B>a</B> </DT>
<DD>Alarm. If the service is running, send it a ALRM
signal. </DD>
<DT><B>i</B> </DT>
<DD>Interrupt. If the service is running, send it a INT signal. </LI><B></B><LI>User-defined
1. If the service is running, send it a USR1 signal. </LI><B></B><LI>User-defined 2. If the
service is running, send it a USR2 signal. </DD>
<DT><B>t</B> </DT>
<DD>Terminate. If the service is
running, send it a TERM signal. </DD>
<DT><B>k</B> </DT>
<DD>Kill. If the service is running, send it
a KILL signal. </DD>
<DT><B>x or <B>e</B> </B></DT>
<DD>Exit. If the service is running, send it a TERM signal.
Do not restart the service. If the service is down, and no log service exists,
<B>runsv</B> exits. If the service is down and a log service exists, send a TERM
signal to the log service. If the log service is down, <B>runsv</B> exits. This
command is ignored if it is given to <I>service</I>/log/supervise/control. </DD>
</DL>
<P>
For
example, to send a TERM signal to /service/socklog-unix, either do # svc
-t /service/socklog-unix<BR>
or<BR>
# echo -n t >/service/socklog-unix/supervise/control<BR>
<P>
If <B><I>echo</B>(1)</I> on your systems does not provide the -n option, leave it out,
<B>runsv</B> ignores unknown characters written to the control pipe. <B><I>echo</B>(1)</I> usually
blocks if no <B>runsv</B> process is running in the service directory.
<H2><A NAME="sect4">Signals</A></H2>
If
<B>runsv</B> receives a TERM signal, it acts as if the character x was written
to the control pipe.
<H2><A NAME="sect5">Exit Codes</A></H2>
<B>runsv</B> exits 111 on an error on startup or
if another <B>runsv</B> is running in <I>service</I>. <P>
<B>runsv</B> exits 0 if it was told to
exit.
<H2><A NAME="sect6">See Also</A></H2>
<I>runit(8)</I>, <I>runit-init(8)</I>, <I>runsvdir(8)</I>, <I>svc(8)</I>, <I>supervise(8)</I>
<P>
<I>http://smarden.org/runit/</I><BR>
<I>http://cr.yp.to/daemontools.html</I><BR>
<H2><A NAME="sect7">Author</A></H2>
Gerrit Pape <pape@smarden.org> <P>
<HR><P>
<A NAME="toc"><B>Table of Contents</B></A><P>
<UL>
<LI><A NAME="toc0" HREF="#sect0">Name</A></LI>
<LI><A NAME="toc1" HREF="#sect1">Synopsis</A></LI>
<LI><A NAME="toc2" HREF="#sect2">Description</A></LI>
<LI><A NAME="toc3" HREF="#sect3">Control</A></LI>
<LI><A NAME="toc4" HREF="#sect4">Signals</A></LI>
<LI><A NAME="toc5" HREF="#sect5">Exit Codes</A></LI>
<LI><A NAME="toc6" HREF="#sect6">See Also</A></LI>
<LI><A NAME="toc7" HREF="#sect7">Author</A></LI>
</UL>
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