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Remove HAVE_UNIX_SOCKETS.

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Since HAVE_UNIX_SOCKETS is now defined unconditionally, remove the macro
and drop a small amount of dead code.

The last known systems not to have them (as far as I know at least) were
QNX, which we de-supported years ago, and Windows, which now has them.

If a new OS ever shows up with the POSIX sockets API but without working
AF_UNIX, it'll presumably still be able to compile the code, and fail at
runtime with an unsupported address family error.  We might want to
consider adding a HINT that you should turn off the option to use it if
your network stack doesn't support it at that point, but it doesn't seem
worth making the relevant code conditional at compile time.

Also adjust a couple of places in the docs and comments that referred to
builds without Unix-domain sockets, since there aren't any.  Windows
still gets a special mention in those places, though, because we don't
try to use them by default there yet.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/CA%2BhUKG%2BL_3brvh%3D8e0BW_VfX9h7MtwgN%3DnFHP5o7X2oZucY9dg%40mail.gmail.com
This commit is contained in:
Thomas Munro
2022-08-14 08:46:53 +12:00
parent e07ebd4b6e
commit f558088285
13 changed files with 12 additions and 130 deletions
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9
doc/src/sgml/libpq.sgml
View File

@ -1070,9 +1070,8 @@ postgresql://%2Fvar%2Flib%2Fpostgresql/dbname
specified, or is empty, is to connect to a Unix-domain
socket<indexterm><primary>Unix domain socket</primary></indexterm> in
<filename>/tmp</filename> (or whatever socket directory was specified
when <productname>PostgreSQL</productname> was built). On Windows and
on machines without Unix-domain sockets, the default is to connect to
<literal>localhost</literal>.
when <productname>PostgreSQL</productname> was built). On Windows,
the default is to connect to <literal>localhost</literal>.
</para>
<para>
A comma-separated list of host names is also accepted, in which case
@ -1152,8 +1151,8 @@ postgresql://%2Fvar%2Flib%2Fpostgresql/dbname
<para>
Without either a host name or host address,
<application>libpq</application> will connect using a local
Unix-domain socket; or on Windows and on machines without Unix-domain
sockets, it will attempt to connect to <literal>localhost</literal>.
Unix-domain socket; or on Windows, it will attempt to connect to
<literal>localhost</literal>.
</para>
</listitem>
</varlistentry>

2
doc/src/sgml/ref/psql-ref.sgml
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@ -656,7 +656,7 @@ EOF
of these options are required; there are useful defaults. If you omit the host
name, <application>psql</application> will connect via a Unix-domain socket
to a server on the local host, or via TCP/IP to <literal>localhost</literal> on
machines that don't have Unix-domain sockets. The default port number is
Windows. The default port number is
determined at compile time.
Since the database server uses the same default, you will not have
to specify the port in most cases. The default user name is your