Module Name: src
Committed By: mlelstv
Date: Sun Oct 20 08:21:30 UTC 2024
Modified Files:
src/sbin/gpt: gpt.c gpt_private.h gpt_uuid.c uuid.c
Log Message:
When generating timestamp based GUIDs for reproducable builds
- increment timestamp by 100ns for each partition.
- use the standard time-based UUID format (type 1) and don't
pretend it's a random number (type 4).
- make the -T option actually work for the uuid command.
Random GUIDs:
start size index contents
34 1000 1 GPT part - d93ba067-a788-4ce0-99b8-0ead51f00215
1034 2000 2 GPT part - bebba77a-7fdc-4ca0-a1bf-7450aa871d41
d93ba067-a788-4ce0-99b8-0ead51f00215:
Version 4 Random
Variant 2 RFC 4122
Data D9 3B A0 67 A7 88 4C E0 99 B8 0E AD 51 F0 02 15
bebba77a-7fdc-4ca0-a1bf-7450aa871d41:
Version 4 Random
Variant 2 RFC 4122
Data BE BB A7 7A 7F DC 4C A0 A1 BF 74 50 AA 87 1D 41
Timestamp based GUIDs:
start size index contents
34 1000 1 GPT part - 0a524600-8eba-11ef-8000-000000000000
1034 2000 2 GPT part - 0a524601-8eba-11ef-8000-000000000000
0a524600-8eba-11ef-8000-000000000000:
Version 1 Time and MAC based
Variant 2 RFC 4122
Node 00:00:00:00:00:00
Clock 0
Time 2024-10-20T08:05:16.000000.0Z
0a524601-8eba-11ef-8000-000000000000:
Version 1 Time and MAC based
Variant 2 RFC 4122
Node 00:00:00:00:00:00
Clock 0
Time 2024-10-20T08:05:16.000000.1Z
Node (host MAC address) and clock (sequence number incremented whenever
the time went backwards) are left undefined (all zero) for our purpose.
To generate a diff of this commit:
cvs rdiff -u -r1.89 -r1.90 src/sbin/gpt/gpt.c
cvs rdiff -u -r1.3 -r1.4 src/sbin/gpt/gpt_private.h
cvs rdiff -u -r1.22 -r1.23 src/sbin/gpt/gpt_uuid.c
cvs rdiff -u -r1.2 -r1.3 src/sbin/gpt/uuid.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
