Subtle errors

I am adding Strigi support to an application using the Strigi socket interface (it’s faster than DBus and, in my case, easier to use). When using the socket interface, Strigi needs to to know where the socket should be created (for instance, /home/pgquiles/.strigi/socket) and it will search for indices in a subdirectory of that directory (/home/pgquiles/.strigi/clucene if using the CLucene backend, /home/pgquiles/.strigi/estraier if using the HyperEstraier backend, etc).

So I was telling Strigi the socket should be created in /home/pgquiles/.strigi/socket and to use the CLucene backend, thus indices would be looked for in /home/pgquiles/.strigi/clucene. Problem is, I was not getting any result back!

    std::string socketpath("/.strigi/socket");

    const char *homeVariableName = "HOME";
    char *home = getenv(homeVariableName);

    if( 0 != home ) {
      std::string socketpath = std::string(home) + "/.strigi/socket";      
    }

    socket.setSocketPath( (const char*)socketpath.c_str() );

Notice the subtle error with block-scoped std::string socketpath hiding method-scoped std::string socketpath. Due to that, Strigi tried to use a socket from /.strigi/socket (which did not exist) instead of the right one, so it did not even try to look for indices!.