mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
84 lines
2.6 KiB
Groff
84 lines
2.6 KiB
Groff
.\" 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 26, 2002
|
|
.Dt UUIDGEN 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm uuidgen
|
|
.Nd generate universally unique identifiers
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In 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.
|
|
.Pp
|
|
When multiple identifiers are requested, the
|
|
.Nm
|
|
system call will generate identifiers that are adjacent in time.
|
|
.Pp
|
|
Universally unique identifiers, also known as globally unique identifiers,
|
|
are normally represented as:
|
|
.Pp
|
|
.Dl 63d81915-7140-11d6-903d-00022d09712b
|
|
.Sh RETURN VALUES
|
|
.Rv -std
|
|
.Sh ERRORS
|
|
The
|
|
.Nm
|
|
system call can fail with:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EFAULT
|
|
The buffer pointed to by
|
|
.Fa store
|
|
could not be written to for any or all identifiers.
|
|
.It 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 .
|