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<!-- manual page source format generated by PolyglotMan v3.0.7, -->
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<HTML>
<HEAD>
<TITLE>man page(1)</TITLE>
</HEAD>
<BODY bgcolor=white>
<A HREF="#toc">Table of Contents</A><P>
<H2><A NAME="sect0" HREF="#toc0">Name</A></H2>
<P>
nasd - Network Audio System server
<H2><A NAME="sect1" HREF="#toc1"><B>Synopsis</B></A></H2>
<P>
<B>nasd</B> [:listen port offset] [-option ...]
<H2><A NAME="sect2" HREF="#toc2"><B>Description</B></A></H2>
<P>
<I>nasd</I> is the generic name for the Network Audio System
server. It is frequently a link or a copy of the appropriate
server binary for driving the most frequently used
server on a given machine.
<H2><A NAME="sect3" HREF="#toc3"><B>Starting</B> <B>the</B> <B>Server</B></A></H2>
<P>
The server is usually started from /etc/rc or a user's
startup script.
<P>
When the Network Audio System server starts up, it takes
over /dev/audio. Note, that if ReleaseDevice is set to
TRUE [default] in the nasd.conf file, nasd will relinquish
control of the audio device whenever it has finished playing
a sound. This means you can use other non-NAS applications
when nasd is running, as long as nasd isn't currently
playing a song. If ReleaseDevice is set to FALSE
in the nasd.conf file, applications that attempt to access
/dev/audio themselves will fail while nasd is running.
<H2><A NAME="sect4" HREF="#toc4"><B>Network</B> <B>Connections</B></A></H2>
<P>
The Network Audio System server supports connections made
using the following reliable byte-streams:
<DL>
<DT><I>TCPIP</I></DT></DT>
<DD>
The server listens on port 8000+<I>n</I>, where <I>n</I> is the listen
port offset.
</DD>
</DL>
<P>
<I>Unix</I> <I>Domain</I><BR>
The X server uses <I>/tmp/.sockets/audio</I><B>n</B> as the filename
for the socket, where <I>n</I> is the display number.
<H2><A NAME="sect5" HREF="#toc5"><B>Options</B></A></H2>
<P>
All of the Network Audio System servers accept the following
generic command line options. Options specific to a
particular server may also be available, and are not
listed here. Try `nasd -?' for a list of those options,
if available.
<DL>
<DT><B>-aa</B> </DT></DT>
<DD> Allows any client to connect. By default, access
is allowed only to authenticated clients.
</DD>
<DT><B>-local</B> </DT></DT>
<DD>Allows only clients on the local host to connect.
By default, access is allowed to local and remote
hosts.
</DD>
<DT><B>-v</B> </DT></DT>
<DD> Enable verbose messages. This option overrides
the nasd.conf file setting.
</DD>
<DT><B>-d</B> <I>n</I> </DT></DT>
<DD> Enable debugging output at level <I>n</I>, where <I>n</I> is a
positive integer. The higher the level, the more
output you will get. A value of 0 [default] disables
debugging output. This option overrides the
nasd.conf file setting. When debugging is
enabled, stderr is not closed by the nasd process,
and all debugging messages are written there.
</DD>
<DT><B>-pn</B></DT></DT>
<DD>
</DD>
<DT><B>-nopn</B> <B>[default]</B></DT></DT>
<DD>
Enables or disables Partial Networking. Enabling
Partial Networking allows the server to start,
even if the server cannot establish all of its
well-known sockets (connection points for
clients), but establishes at least one.
</DD>
<DT><B>-config</B> <I>file</I> </DT></DT>
<DD> Use the config file <I>file</I>, instead of the default (/etc/nasd/nasd.conf).
</DD>
</DL>
<H2><A NAME="sect6" HREF="#toc6"><B>Signals</B></A></H2>
<P>
The Network Audio System server attaches special meaning
to the following signals:
<P>
<I>SIGHUP</I> This signal causes the server to close all existing
connections, free all resources, and restore
all defaults.
<P>
<I>SIGTERM</I> This signal causes the server to exit cleanly.
<P>
<I>SIGUSR1</I> This signal is used quite differently from either
of the above. When the server starts, it checks
to see if it has inherited SIGUSR1 as SIG_IGN
instead of the usual SIG_DFL. In this case, the
server sends a SIGUSR1 to its parent process after
it has set up the various connection schemes.
<H2><A NAME="sect7" HREF="#toc7"><B>Diagnostics</B></A></H2>
<P>
Too numerous to list them all.
<H2><A NAME="sect8" HREF="#toc8"><B>Files</B></A></H2>
<DL>
<DT>/tmp/.sockets/audio* </DT></DT>
<DD> Unix domain socket
</DD>
</DL>
<P>
/usr/adm/audio*msgs
<DL>
<DT>/dev/audio </DT></DT>
<DD> Audio device
</DD>
</DL>
<H2><A NAME="sect9" HREF="#toc9"><B>See</B> <B>Also</B></A></H2>
<P>
<A HREF="man:nas(1)">nas(1)</A>
, <A HREF="man:auinfo(1)">auinfo(1)</A>
, <A HREF="man:auplay(1)">auplay(1)</A>
, <A HREF="man:auctl(1)">auctl(1)</A>
, <A HREF="man:nasd.conf(1)">nasd.conf(1)</A>
<H2><A NAME="sect10" HREF="#toc10"><B>Bugs</B></A></H2>
<P>
If <I>au</I> dies before its clients, new clients won't be able
to connect until all existing connections have their TCP
TIME_WAIT timers expire.
<P>
The current access control support is weak at best.
<H2><A NAME="sect11" HREF="#toc11"><B>Copyright</B></A></H2>
<P>
Copyright 1993, Network Computing Devices, Inc.
<H2><A NAME="sect12" HREF="#toc12"><B>Authors</B></A></H2>
<P>
The Network Audio System server was originally written by
Greg Renda and Dave Lemke, with large amounts of code borrowed
from the sample X server.
<P>
The sample X server was originally written by Susan Angebranndt,
Raymond Drewry, Philip Karlton, and Todd Newman,
from Digital Equipment Corporation, with support from a
large cast. It has since been extensively rewritten by
Keith Packard and Bob Scheifler, from MIT.
<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">Starting the Server</A></LI>
<LI><A NAME="toc4" HREF="#sect4">Network Connections</A></LI>
<LI><A NAME="toc5" HREF="#sect5">Options</A></LI>
<LI><A NAME="toc6" HREF="#sect6">Signals</A></LI>
<LI><A NAME="toc7" HREF="#sect7">Diagnostics</A></LI>
<LI><A NAME="toc8" HREF="#sect8">Files</A></LI>
<LI><A NAME="toc9" HREF="#sect9">See Also</A></LI>
<LI><A NAME="toc10" HREF="#sect10">Bugs</A></LI>
<LI><A NAME="toc11" HREF="#sect11">Copyright</A></LI>
<LI><A NAME="toc12" HREF="#sect12">Authors</A></LI>
</UL>
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