Date: Wed, 24 May 2000 15:36:58 -0400 From: "TEMPLE, MATTHEW (LNG)" <matthew.temple@lexis-nexis.com> To: "'Dan Nelson'" <dnelson@emsphone.com> Cc: "'freebsd-questions@freebsd.org'" <freebsd-questions@FreeBSD.ORG>, "MITZKA, JOHN (LNG)" <JOHN.MITZKA@lexis-nexis.com> Subject: RE: uuidgen or other GUID-generating utility Message-ID: <27E4B476932BD211945B00805FE67AF5089DE1E1@lnxdayexch05.lexis-nexis.com>
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Ok...SunOS 5.5.1 does have a uuidgen and Linux's uuidgen does not simply
spit out a random string. Included below is an excerpt from the Linux man
page for uuidgen. I need to generate a GUID of comparable quality on a
FreeBSD web server. Does anyone on this list know if FreeBSD has equivalent
functionality or, if not, where I might find source code for a uuidgen
utility?
Thanks...
----------------------------------------------------------------------------
-----------------------------------------------------------
UUIDGEN(1) UUIDGEN(1)
NAME
uuidgen - command-line utility to create a new UUID value
SYNOPSIS
uuidgen [ -r | -t ]
DESCRIPTION
The uuidgen program creates a new universally unique iden¡
tifier (UUID) using the libuuid(3) library. The new UUID
can reasonably be considered unique among all UUIDs cre¡
ated on the local system, and among UUIDs created on other
systems in the past and in the future.
There are two types of UUID's which uuidgen can generate:
time-based UUID's and random-based UUID's. By default
uuidgen will generate a random-based UUID if a high-qual¡
ity random number generator is present. Otherwise, it
will chose a time-based UUID. It is possible to force the
generation of one of these two UUID types by using the -r
or -t options.
OPTIONS
-r Generate a random-based UUID. This method creates
a UUID consisting mostly of random bits. It
requires that the operating system have a high
quality random number generator, such as /dev/ran¡
dom.
-t Generate a time-based UUID. This method creates a
UUID based on the system clock plus the system's
ethernet hardware address, if present.
...
> -----Original Message-----
> From: Dan Nelson [SMTP:dnelson@emsphone.com]
> Sent: Wednesday, May 24, 2000 3:05 PM
> To: TEMPLE, MATTHEW (LNG)
> Cc: 'freebsd-questions@freebsd.org'
> Subject: Re: uuidgen or other GUID-generating utility
>
> In the last episode (May 24), TEMPLE, MATTHEW (LNG) said:
> > I need a globally unique ID, like 28eea00e-a872-491e-8848-a9b8daf3314b.
> > Linux and Solaris have a utility called uuidgen that spits them out.
>
> Solaris doesn't have anything like that (on 2.6 at least), and Linux's
> uuidgen simply generates a random string.
>
> This should do what you want:
>
> printf "%s%s-%s-%s-%s-%s%s%s\n" `jot -r -w "%04x" 8 0 65536`
>
> --
> Dan Nelson
> dnelson@emsphone.com
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