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Tom Lane db6986f47c Fix libpq to not require user's home directory to exist. 
Some people like to run libpq-using applications in environments where
there's no home directory.  We've broken that scenario before (cf commits
5b4067798 and bd58d9d88), and commit ba005f193 broke it again, by making
it a hard error if we fail to get the home directory name while looking
for ~/.pgpass.  The previous precedent is that if we can't get the home
directory name, we should just silently act as though the file we hoped
to find there doesn't exist.  Rearrange the new code to honor that.

Looking around, the service-file code added by commit 41a4e4595 had the
same disease.  Apparently, that escaped notice because it only runs when
a service name has been specified, which I guess the people who use this
scenario don't do.  Nonetheless, it's wrong too, so fix that case as well.

Add a comment about this policy to pqGetHomeDirectory, in the probably
vain hope of forestalling the same error in future.  And upgrade the
rather miserable commenting in parseServiceInfo, too.

In passing, also back off parseServiceInfo's assumption that only ENOENT
is an ignorable error from stat() when checking a service file.  We would
need to ignore at least ENOTDIR as well (cf 5b4067798), and seeing that
the far-better-tested code for ~/.pgpass treats all stat() failures alike,
I think this code ought to as well.

Per bug #14872 from Dan Watson.  Back-patch the .pgpass change to v10
where ba005f193 came in.  The service-file bugs are far older, so
back-patch the other changes to all supported branches.

Discussion: https://postgr.es/m/20171025200457.1471.34504@wrigleys.postgresql.org
2017-10-25 19:32:24 -04:00
config Extend & revamp pg_bswap.h infrastructure. 2017-09-29 17:24:39 -07:00
contrib pg_stat_statements: Add a comment about the dangers of padding bytes. 2017-10-20 09:44:03 -04:00
doc Documentation improvements around domain types. 2017-10-24 14:08:40 -04:00
src Fix libpq to not require user's home directory to exist. 2017-10-25 19:32:24 -04:00
.dir-locals.el emacs: Set indent-tabs-mode in perl-mode 2015-04-12 23:53:23 -04:00
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Add lcov --initial 2017-09-29 08:54:34 -04:00
aclocal.m4 Make configure check for IPC::Run when --enable-tap-tests is specified. 2017-06-15 15:56:12 -04:00
configure Force "restrict" not to be used when compiling with xlc. 2017-10-13 12:15:06 -07:00
configure.in Force "restrict" not to be used when compiling with xlc. 2017-10-13 12:15:06 -07:00
COPYRIGHT Update copyright for 2017 2017-01-03 12:37:53 -05:00
GNUmakefile.in Have "make coverage" recurse into contrib as well 2016-09-05 18:44:36 -03:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Prevent passing down MAKELEVEL/MAKEFLAGS from non-GNU make to GNU make. 2017-08-09 12:05:53 -04:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00

README 

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.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

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