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Tom Lane 7dc66a2f6e 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 Absorb -D_USE_32BIT_TIME_T switch from Perl, if relevant. 2017-08-14 11:48:59 -04:00
contrib Fix crash when logical decoding is invoked from a PL function. 2017-10-06 19:18:58 -04:00
doc Doc: fix missing explanation of default object privileges. 2017-10-11 16:56:40 -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 Fix whitespace and remove obsolete gitattributes entry 2016-03-13 16:03:13 -04:00
.gitignore Add .gitignore entries for AIX-specific intermediate build artifacts. 2015-07-08 20:44:22 -04:00
aclocal.m4 Replace our hacked version of ax_pthread.m4 with latest upstream version. 2015-07-08 20:36:06 +03:00
configure Avoid SIGBUS on Linux when a DSM memory request overruns tmpfs. 2017-09-25 16:09:20 -04:00
configure.in Avoid SIGBUS on Linux when a DSM memory request overruns tmpfs. 2017-09-25 16:09:20 -04:00
COPYRIGHT Update copyright for 2017 2017-01-03 12:37:53 -05:00
GNUmakefile.in Fix distclean/maintainer-clean targets to remove top-level tmp_install dir. 2015-05-13 18:48:05 -04:00
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 12:06:08 -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/.