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+.\" -*- nroff -*-
+.\" Copyright 2007 by Theodore Ts'o.  All Rights Reserved.
+.\" This file may be copied under the terms of the GNU Public License.
+.\"
+.TH UUIDD 8 "July 2014" "util-linux" "System Administration"
+.SH NAME
+uuidd \- UUID generation daemon
+.SH SYNOPSIS
+.B uuidd
+[options]
+.SH DESCRIPTION
+The
+.B uuidd
+daemon is used by the UUID library to generate
+universally unique identifiers (UUIDs), especially time-based UUIDs,
+in a secure and guaranteed-unique fashion, even in the face of large
+numbers of threads running on different CPUs trying to grab UUIDs.
+.SH OPTIONS
+.TP
+.BR \-d , " \-\-debug "
+Run uuidd in debugging mode.  This prevents uuidd from running as a daemon.
+.TP
+.BR \-F , " \-\-no-fork "
+Do not daemonize using a double-fork.
+.TP
+.BR \-k , " \-\-kill "
+If currently a uuidd daemon is running, kill it.
+.TP
+.BR \-n , " \-\-uuids " \fInumber\fR
+When issuing a test request to a running uuidd, request a bulk response
+of
+.I number
+UUIDs.
+.TP
+.BR \-P , " \-\-no-pid "
+Do not create a pid file.
+.TP
+.BR \-p , " \-\-pid " \fIpath\fR
+Specify the pathname where the pid file should be written.  By default,
+the pid file is written to @runstatedir@/uuidd/uuidd.pid.
+.TP
+.BR \-q , " \-\-quiet "
+Suppress some failure messages.
+.TP
+.BR \-r , " \-\-random "
+Test uuidd by trying to connect to a running uuidd daemon and
+request it to return a random-based UUID.
+.TP
+.BR \-S , " \-\-socket-activation "
+Do not create a socket but instead expect it to be provided by the calling
+process.  This implies \fB--no-fork\fR and \fB--no-pid\fR.  This option is
+intended to be used only with \fBsystemd\fR(1).  It needs to be enabled with
+a configure option.
+.TP
+.BR \-s , " \-\-socket " \fIpath\fR
+Make uuidd use this pathname for the unix-domain socket.  By default, the
+pathname used is @runstatedir@/uuidd/request.  This option is primarily
+for debugging purposes, since the pathname is hard-coded in the libuuid
+library.
+.TP
+.BR \-T , " \-\-timeout " \fInumber\fR
+Make uuidd exit after \fInumber\fR seconds of inactivity.
+.TP
+.BR \-t , " \-\-time "
+Test uuidd by trying to connect to a running uuidd daemon and
+request it to return a time-based UUID.
+.TP
+.BR \-V , " \-\-version "
+Output version information and exit.
+.TP
+.BR \-h , " \-\-help "
+Display help screen and exit.
+.SH EXAMPLE
+Start up a daemon, print 42 random keys, and then stop the daemon:
+.PP
+.RS
+.nf
+uuidd -p /tmp/uuidd.pid -s /tmp/uuidd.socket
+uuidd -d -r -n 42 -s /tmp/uuidd.socket
+uuidd -d -k -s /tmp/uuidd.socket
+.nf
+.RE
+.SH AUTHOR
+The
+.B uuidd
+daemon was written by Theodore Ts'o <tytso@mit.edu>.
+.SH "SEE ALSO"
+.BR uuid (3),
+.BR uuidgen (1)
+.SH AVAILABILITY
+The uuidd daemon is part of the util-linux package and is available from the
+.UR https://\:www.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
+Linux Kernel Archive
+.UE .