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Support having multiple Unix-domain sockets per postmaster.

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Replace unix_socket_directory with unix_socket_directories, which is a list
of socket directories, and adjust postmaster's code to allow zero or more
Unix-domain sockets to be created.

This is mostly a straightforward change, but since the Unix sockets ought
to be created after the TCP/IP sockets for safety reasons (better chance
of detecting a port number conflict), AddToDataDirLockFile needs to be
fixed to support out-of-order updates of data directory lockfile lines.
That's a change that had been foreseen to be necessary someday anyway.

Honza Horak, reviewed and revised by Tom Lane
This commit is contained in:
Tom Lane
2012-08-10 17:26:44 -04:00
parent 85642ec00b
commit c9b0cbe98b
17 changed files with 369 additions and 126 deletions
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doc/src/sgml/client-auth.sgml
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@ -838,7 +838,7 @@ omicron bryanh guest1
<varname>unix_socket_permissions</varname> (and possibly
<varname>unix_socket_group</varname>) configuration parameters as
described in <xref linkend="runtime-config-connection">. Or you
could set the <varname>unix_socket_directory</varname>
could set the <varname>unix_socket_directories</varname>
configuration parameter to place the socket file in a suitably
restricted directory.
</para>