NASD(1)NASD(1)NAMEnasd - Network Audio System server
SYNOPSISnasd [:listen port offset] [-option ...]
DESCRIPTIONnasd is the generic name for the Network Audio System
server. It is frequently a link or a copy of the appro
priate server binary for driving the most frequently used
server on a given machine.
STARTING THE SERVER
The server is usually started from /etc/rc or a user's
startup script.
When the Network Audio System server starts up, it takes
over /dev/audio. Note that applications that attempt to
access /dev/audio themselves will fail while it is run
ning.
NETWORK CONNECTIONS
The Network Audio System server supports connections made
using the following reliable byte-streams:
TCPIP
The server listens on port 8000+n, where n is the lis
ten port offset.
Unix Domain
The X server uses /tmp/.sockets/audion as the filename
for the socket, where n is the display number.
OPTIONS
All of the Network Audio System servers accept the follow
ing command line options:
-aa Allows clients on any host to connect. By
default, access is allowed only to clients on the
local host.
SIGNALS
The Network Audio System server attaches special meaning
to the following signals:
SIGHUP This signal causes the server to close all exist
ing connections, free all resources, and restore
all defaults.
SIGTERM This signal causes the server to exit cleanly.
SIGUSR1 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
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NASD(1)NASD(1)
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.
DIAGNOSTICS
Too numerous to list them all.
FILES
/tmp/.sockets/audio* Unix domain socket
/usr/adm/audio*msgs
/dev/audio Audio device
SEE ALSOnas(1), auinfo(1), auplay(1), auctl(1), nasd.conf(1)BUGS
If au dies before its clients, new clients won't be able
to connect until all existing connections have their TCP
TIME_WAIT timers expire.
The current access control support is weak at best.
COPYRIGHT
Copyright 1993, Network Computing Devices, Inc.
AUTHORS
The Network Audio System server was originally written by
Greg Renda and Dave Lemke, with large amounts of code bor
rowed from the sample X server.
The sample X server was originally written by Susan Ange
branndt, 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.
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