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The hint "Is another postmaster already running ..." should only be printed for errors that are really about something else already using the address. In other cases it is misleading. So only show that hint if errno == EADDRINUSE. Also, since Unix-domain sockets in the file-system namespace never report EADDRINUSE for an existing file (they would just overwrite it), the part of the hint saying "If not, remove socket file \"%s\" and retry." can never happen, so remove it. Unix-domain sockets in the abstract namespace can report EADDRINUSE, but in that case there is no file to remove, so the hint doesn't work there either. Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://www.postgresql.org/message-id/flat/6dee8574-b0ad-fc49-9c8c-2edc796f0033@2ndquadrant.com
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/.