$NetBSD: uuidgen.1,v 1.2 2004/09/13 23:44:04 wiz Exp $
Copyright (c) 2002 Marcel Moolenaar
All rights reserved.
Redistribution and use in source and binary forms, with or without
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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$FreeBSD: src/usr.bin/uuidgen/uuidgen.1,v 1.5 2003/05/22 13:10:32 ru Exp $
.Dd September 13, 2004 .Dt UUIDGEN 1 .Os .Sh NAME .Nm uuidgen .Nd generate universally unique identifiers .Sh SYNOPSIS .Nm .Op Fl 1s .Op Fl n Ar count .Op Fl o Ar filename .Sh DESCRIPTION The .Nm utility by default generates a single universally unique identifier (UUID), also known as a globally unique identifier (GUID). By default, .Nm generates a single UUID and outputs it in the standard string representation to stdout. The following options can be used to change the behavior of .Nm : l -tag -offset indent -width XoXfilenameXX t Fl 1 This option only has effect if multiple identifiers are to be generated and instructs .Nm to not generate them in batch, but one at a time. t Fl n Ar count This option controls the number of identifiers generated. By default, multiple identifiers are generated in batch. t Fl o Ar filename Redirect output to .Ar filename instead of stdout. t Fl s Output UUIDs as initialized C structures, rather than in the standard string format. .El
Copyright (c) 2002 Marcel Moolenaar
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
$FreeBSD: src/usr.bin/uuidgen/uuidgen.1,v 1.5 2003/05/22 13:10:32 ru Exp $
.Dd September 13, 2004 .Dt UUIDGEN 1 .Os .Sh NAME .Nm uuidgen .Nd generate universally unique identifiers .Sh SYNOPSIS .Nm .Op Fl 1s .Op Fl n Ar count .Op Fl o Ar filename .Sh DESCRIPTION The .Nm utility by default generates a single universally unique identifier (UUID), also known as a globally unique identifier (GUID). By default, .Nm generates a single UUID and outputs it in the standard string representation to stdout. The following options can be used to change the behavior of .Nm : l -tag -offset indent -width XoXfilenameXX t Fl 1 This option only has effect if multiple identifiers are to be generated and instructs .Nm to not generate them in batch, but one at a time. t Fl n Ar count This option controls the number of identifiers generated. By default, multiple identifiers are generated in batch. t Fl o Ar filename Redirect output to .Ar filename instead of stdout. t Fl s Output UUIDs as initialized C structures, rather than in the standard string format. .El
p Batched generation yields a dense set of identifiers in such a way that there is no identifier that is larger than the smallest identifier in the set and smaller than the largest identifier in the set and that is not already in the set.
p When generating the identifiers one at a time, the identifiers will be close to each other, but operating system latency and processing time will be reflected in the distance between two successive identifiers. .Sh DIAGNOSTICS .Ex -std .Sh SEE ALSO .Xr uuidgen 2 , .Xr uuid 3 .Sh HISTORY The .Nm command first appeared in .Nx 3.0 .
Indexes created Tue Sep 23 14:10:03 GMT 2025