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In summary, if a software writer implements timer events or other events which generate a signal with a timing fast enough to occur while libpq is inside connect(), then connect returns -EINTR. The code following the connect call does not handle this and generates an error message. The sum result is that the pg_connect() fails. If the timer or other event is right on the window of the connect() completion time, the pg_connect() may appear to work sporadically. If the event is too slow, pg_connect() will appear to always work and if the event is too fast, pg_connect() will always fail. David Ford
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 several language bindings, including C, C++, Perl, Python, and Tcl, as well as drivers for JDBC and ODBC. 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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 ftp://ftp.postgresql.org/pub/. For more information look at our web site located at http://www.postgresql.org/.
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