From: Thomas Munro <tmunro@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: More tar portability adjustments.
Date: Sat, 04 Apr 2026 01:02:21 +0000
Message-ID: <E1w8pP3-002psb-01@gemulon.postgresql.org> (raw)
More tar portability adjustments.
For the three implementations that have caused problems so far:
* GNU and BSD (libarchive) tar both understand --format=ustar
* ustar doesn't support large UID/GID values, so set them to 0 to
avoid a hard error from at least GNU tar
* OpenBSD tar needs -F ustar, and it appears to warn but carry
on with "nobody" if a UID is too large
* -f /dev/null is a more portable way to throw away the output, since
the default destination might be a tape device depending on build
options that a distribution might change
* Windows ships BSD tar but lacks /dev/null, so ask perl for its name
Based on their manuals, the other two implementations the tests are
likely to encounter in the wild don't seem to need any special handling:
* Solaris/illumos tar uses ustar and replaces large UIDs with 60001
* AIX tar uses ustar (unless --format=pax) and truncates large UIDs
Backpatch-through: 18
Co-authored-by: Thomas Munro <thomas.munro@gmail.com>
Co-authored-by: Sami Imseih <samimseih@gmail.com> (large UIDs)
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> (earlier version)
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com> (OpenBSD)
Reviewed-by: Andrew Dunstan <andrew@dunslane.net> (Windows)
Discussion: https://postgr.es/m/3676229.1775170250%40sss.pgh.pa.us
Discussion: https://postgr.es/m/CAA5RZ0tt89MgNi4-0F4onH%2B-TFSsysFjMM-tBc6aXbuQv5xBXw%40mail.gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/bab656bb87b0ffed92407f93d0d4a9e4d18c0c5c
Modified Files
--------------
src/test/perl/PostgreSQL/Test/Utils.pm | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: tmunro@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: More tar portability adjustments.
In-Reply-To: <E1w8pP3-002psb-01@gemulon.postgresql.org>
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