[Bug 272374] successive uuidgen(1) invocations have too many similar characters

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 04 Jul 2023 22:27:48 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272374

            Bug ID: 272374
           Summary: successive uuidgen(1) invocations have too many
                    similar characters
           Product: Base System
           Version: Unspecified
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: jonc@chen.org.nz

On STABLE/13 as of July 2023, successive calls to uuidgen(1) will generate
output with only 8 differing characters out of the 36 significant characters
(ie: excluding '-').

10:21am> uname -a
FreeBSD stormbringer 13.2-STABLE FreeBSD 13.2-STABLE #0
stable/13-n255361-b1e09025dfdb: Mon May 15 09:24:22 NZST 2023    
root@stormbringer:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
10:21am> uuidgen
24605203-1ab9-11ee-8e91-cc96e507d30e
10:21am> uuidgen
2a62673d-1ab9-11ee-8e91-cc96e507d30e
10:21am> uuidgen
3fd2e09c-1ab9-11ee-8e91-cc96e507d30e
10:22am> uuidgen
7c5ad421-1ab9-11ee-8e91-cc96e507d30e
10:24am> uuidgen
8a52529c-1ab9-11ee-8e91-cc96e507d30e

Compare this to Linux's uuidgen(1) which has a higher degree of difference:

10:23am> uname -a
Linux proxy-2 5.4.0-1057-aws #60~18.04.1-Ubuntu SMP Thu Sep 9 20:38:09 UTC 2021
x86_64 x86_64 x86_64 GNU/Linux
10:25am> uuidgen
17c12b04-639d-4b02-b022-68ceff175072
10:25am> uuidgen
96cce7cb-25f7-4749-8229-bccd9931feb8
10:26am> uuidgen
ad4a3e56-8895-43db-b8cb-6b440d9377f2

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