uuidgen.2 revision 97372
Copyright (c) 2002 Marcel Moolenaar
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$FreeBSD: head/lib/libc/sys/uuidgen.2 97372 2002-05-28 06:16:08Z marcel $
.Dd May 26, 2002 .Dt UUIDGEN 2 .Os .Sh NAME .Nm uuidgen .Nd generate universally unique identifiers .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/uuid.h .Ft int .Fn uuidgen "uuid_t *store" "int count" .Sh DESCRIPTION The .Nm system call generates .Fa count universally unique identifiers (UUIDs) and writes them to the buffer pointed to by .Fa store . The identifiers are generated according to the syntax and semantics of the DCE version 1 variant of universally unique identifiers. When no IEEE 802 address is available for the node field a random multicast address is generated for each call.
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: head/lib/libc/sys/uuidgen.2 97372 2002-05-28 06:16:08Z marcel $
.Dd May 26, 2002 .Dt UUIDGEN 2 .Os .Sh NAME .Nm uuidgen .Nd generate universally unique identifiers .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/uuid.h .Ft int .Fn uuidgen "uuid_t *store" "int count" .Sh DESCRIPTION The .Nm system call generates .Fa count universally unique identifiers (UUIDs) and writes them to the buffer pointed to by .Fa store . The identifiers are generated according to the syntax and semantics of the DCE version 1 variant of universally unique identifiers. When no IEEE 802 address is available for the node field a random multicast address is generated for each call.
p When multiple identifiers are requested, the .Nm system call will generate identifiers that are adjacent in time.
p Universally unique identifiers, also known as globally unique identifiers, are normally represented as: d -literal -offset indent 63d81915-7140-11d6-903d-00022d09712b .Ed .Sh RETURN VALUES .Rv -std .Sh ERRORS The .Nm system call can fail with: l -tag -width Er t Bq Er EFAULT The buffer pointed to by .Fa store could not be written to for any or all identifiers. t Bq Er EINVAL The .Fa count parameter is less than 1 or larger than the hard upper limit of 2048. .El .Sh SEE ALSO .Xr uuidgen 1 .Sh HISTORY The .Nm system call first appeared in .Fx 5.0 .