GNU bug report logs - #33639
ISO installer image is broken on i686

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Package: guix;

Reported by: Ludovic Courtès <ludo <at> gnu.org>

Date: Thu, 6 Dec 2018 00:04:02 UTC

Severity: serious

Merged with 35136

Done: Ludovic Courtès <ludo <at> gnu.org>

Bug is archived. No further changes may be made.

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From: "Thomas Schmitt" <scdbackup <at> gmx.net>
To: bug-xorriso <at> gnu.org
Cc: pelzflorian <at> pelzflorian.de, 33639 <at> debbugs.gnu.org
Subject: bug#33639: ISO installer image is broken on i686
Date: Mon, 15 Apr 2019 10:35:11 +0200

Hi,

it seems to help if you explicitely set the timestamps of the "/" directory

  export SOURCE_DATE_EPOCH=1555311212

  xorriso -outdev test.iso -map x /x \
          -alter_date b-c 1970010100000000 / -- \
          -alter_date c 1970010100000000 / --

ISOs made with these xorriso commands match perfectly.

A bit more elegant than 1970 would be to use the seconds value from
SOURCE_DATE_EPOCH (prefix "=" announces date +%s format):

          -alter_date b-c =$SOURCE_DATE_EPOCH / -- \
          -alter_date c   =$SOURCE_DATE_EPOCH / --

The -alter_date commands should be performed after all -map commands,
just to make sure that the timestamps do not get changed again.

I still need to find out where the current time sneaks in.
But this workaround should not do harm after the bug was corrected.


Have a nice day :)

Thomas
This bug report was last modified 5 years and 215 days ago.

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