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Thomas Munro 5079e420b9 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
2026-04-04 14:02:28 +13:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
contrib Avoid memory leak on error while parsing pg_stat_statements dump file 2026-03-27 12:21:29 +02:00
doc doc: Add missing description for DROP SUBSCRIPTION IF EXISTS. 2026-04-01 09:48:48 -05:00
src More tar portability adjustments. 2026-04-04 14:02:28 +13:00
.abi-compliance-history Update .abi-compliance-history for AddRelationNotNullConstraints(). 2026-02-21 13:08:44 +01:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:53 -04:00
.cirrus.tasks.yml Fix typo 2026-01-07 15:48:45 +01:00
.cirrus.yml ci: Per-repo configuration for manually trigger tasks 2025-08-14 11:33:44 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add script to keep .editorconfig in sync with .gitattributes 2025-02-01 10:09:45 +01:00
.git-blame-ignore-revs Add previous commit to .git-blame-ignore-revs. 2025-10-21 10:02:19 -05:00
.gitattributes Fix git whitespace warning 2025-08-15 10:32:22 +02:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
.mailmap Add a Git .mailmap file 2024-11-05 13:56:02 +01:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
configure.ac Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
COPYRIGHT Update copyright for 2026 2026-01-01 13:24:10 -05:00
GNUmakefile.in Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Adapt REL_18_STABLE to its new status as a stable branch 2025-06-29 23:00:00 -04:00
meson.build Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
meson_options.txt Add support for basic NUMA awareness 2025-04-07 23:08:17 +02:00
README.md Adapt REL_18_STABLE to its new status as a stable branch 2025-06-29 23:00:00 -04:00

PostgreSQL Database Management System

This directory contains the source code distribution of the PostgreSQL database management system.

PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.