NAME

mDNSResponder — Multicast DNS daemon

SYNOPSIS

mDNSResponder

DESCRIPTION

mDNSResponder (also known as mdnsd on some systems) is a daemon invoked
at boot time to implement Multicast DNS and DNS Service Discovery.

mDNSResponder listens UDP port 5353 for Multicast DNS Query packets.
When it receives a query for which it knows an answer, mDNSResponder
issues the appropriate Multicast DNS Reply packet.

mDNSResponder also performs Multicast DNS Queries on behalf of client
processes, and maintains a cache of the replies.

mDNSResponder has no user-specifiable command-line argument, and users
should not run mDNSResponder manually.

To examine mDNSResponder’s internal state, for debugging and disagnostic
purposes, send it a SIGINFO signal, and it will then dump a snapshot sum-
mary of its internal state to /var/log/system.log, e.g.

sudo killall -INFO mDNSResponder

FILES

/usr/sbin/mDNSResponder

SEE ALSO

mDNS(1)

For information on Multicast DNS, see http://www.multicastdns.org/
For information on DNS Service Discovery, see http://www.dns-sd.org/
For information on how to use the Multicast DNS and the DNS Service Dis-
covery APIs on Mac OS X and other platforms, see
http://developer.apple.com/bonjour/
For the source code to mDNSResponder, see
http://developer.apple.com/darwin/projects/bonjour/

BUGS

mDNSResponder bugs are tracked in Apple Radar component “mDNSResponder”.

HISTORY

The mDNSResponder daemon first appeared in Mac OS X 10.2 (Jaguar).

Also available from the Darwin open source repository (though not offi-
cially supported by Apple) are mDNSResponder daemons for other platforms,
including Mac OS 9, Microsoft Windows, Linux, FreeBSD, NetBSD, Solaris,
and other POSIX systems.

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NAME

diskarbitrationd — disk arbitration daemon

SYNOPSIS

diskarbitrationd [-d]

DESCRIPTION

diskarbitrationd listens for connections from clients, notifies clients
of the appearance of disks and filesystems, and governs the mounting of
filesystems and the claiming of disks amongst clients.

diskarbitrationd is accessed via the Disk Arbitration framework.

Options:

-d Report detailed information in /var/log/diskarbitrationd.log.
This option forces diskarbitrationd to run in the foreground.

The file /etc/fstab is consulted for user-defined mount points, indexed
by filesystem, in the mount point determination for a filesystem. Each
filesystem can be identified by its UUID or by its label, using the con-
structs “UUID” or “LABEL”, respectively. For example:

UUID=DF000C7E-AE0C-3B15-B730-DFD2EF15CB91 /export ufs ro
UUID=FAB060E9-79F7-33FF-BE85-E1D3ABD3EDEA none hfs rw,noauto
LABEL=The\040Volume\040Name\040Is\040This none msdos ro

FILES

/etc/fstab
/etc/mach_init.d/diskarbitrationd.plist
/var/log/diskarbitrationd.log
/var/run/diskarbitrationd.pid

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