Add a boolean GUC parameter "bonjour" to control whether a Bonjour-enabled

build actually attempts to advertise itself via Bonjour.  Formerly it always
did so, which meant that packagers had to decide for their users whether
this behavior was wanted or not.  The default is "off" to be on the safe
side, though this represents a change in the default behavior of a
Bonjour-enabled build.  Per discussion.

doc/src/sgml/config.sgml

@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.224 2009/08/24 20:08:31 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.225 2009/09/08 17:08:36 tgl Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -472,6 +472,20 @@ SET ENABLE_SEQSCAN TO OFF;
       </listitem>
      </varlistentry>
 
+     <varlistentry id="guc-bonjour" xreflabel="bonjour">
+      <term><varname>bonjour</varname> (<type>boolean</type>)</term>
+      <indexterm>
+       <primary><varname>bonjour</> configuration parameter</primary>
+      </indexterm>
+      <listitem>
+       <para>
+        Enables advertising the server's existence via
+        <productname>Bonjour</productname>.  The default is off.
+        This parameter can only be set at server start.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry id="guc-bonjour-name" xreflabel="bonjour_name">
       <term><varname>bonjour_name</varname> (<type>string</type>)</term>
       <indexterm>
@@ -479,7 +493,7 @@ SET ENABLE_SEQSCAN TO OFF;
       </indexterm>
       <listitem>
        <para>
-        Specifies the <productname>Bonjour</productname> broadcast
+        Specifies the <productname>Bonjour</productname> service
         name.  The computer name is used if this parameter is set to the
         empty string <literal>''</> (which is the default).  This parameter is
         ignored if the server was not compiled with

src/backend/postmaster/postmaster.c

@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.595 2009/09/08 16:08:26 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.596 2009/09/08 17:08:36 tgl Exp $
  *
  * NOTES
  *
@@ -200,6 +200,7 @@ bool		log_hostname;		/* for ps display and logging */
 bool		Log_connections = false;
 bool		Db_user_namespace = false;
 
+bool		enable_bonjour = false;
 char	   *bonjour_name;
 
 /* PIDs of special child processes; 0 when not running */
@@ -854,7 +855,7 @@ PostmasterMain(int argc, char *argv[])
 
 #ifdef USE_BONJOUR
 	/* Register for Bonjour only if we opened TCP socket(s) */
-	if (ListenSocket[0] != -1)
+	if (enable_bonjour && ListenSocket[0] != -1)
 	{
 		DNSServiceErrorType err;
 

src/backend/utils/misc/guc.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.515 2009/09/03 22:08:05 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.516 2009/09/08 17:08:36 tgl Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -152,6 +152,7 @@ static bool assign_phony_autocommit(bool newval, bool doit, GucSource source);
 static const char *assign_custom_variable_classes(const char *newval, bool doit,
 							   GucSource source);
 static bool assign_debug_assertions(bool newval, bool doit, GucSource source);
+static bool assign_bonjour(bool newval, bool doit, GucSource source);
 static bool assign_ssl(bool newval, bool doit, GucSource source);
 static bool assign_stage_log_stats(bool newval, bool doit, GucSource source);
 static bool assign_log_stats(bool newval, bool doit, GucSource source);
@@ -681,6 +682,14 @@ static struct config_bool ConfigureNamesBool[] =
 		&session_auth_is_superuser,
 		false, NULL, NULL
 	},
+	{
+		{"bonjour", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
+			gettext_noop("Enables advertising the server via Bonjour."),
+			NULL
+		},
+		&enable_bonjour,
+		false, assign_bonjour, NULL
+	},
 	{
 		{"ssl", PGC_POSTMASTER, CONN_AUTH_SECURITY,
 			gettext_noop("Enables SSL connections."),
@@ -2199,7 +2208,7 @@ static struct config_string ConfigureNamesString[] =
 
 	{
 		{"bonjour_name", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
-			gettext_noop("Sets the Bonjour broadcast service name."),
+			gettext_noop("Sets the Bonjour service name."),
 			NULL
 		},
 		&bonjour_name,
@@ -7394,6 +7403,21 @@ assign_debug_assertions(bool newval, bool doit, GucSource source)
 	return true;
 }
 
+static bool
+assign_bonjour(bool newval, bool doit, GucSource source)
+{
+#ifndef USE_BONJOUR
+	if (newval)
+	{
+		ereport(GUC_complaint_elevel(source),
+				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+				 errmsg("Bonjour is not supported by this build")));
+		return false;
+	}
+#endif
+	return true;
+}
+
 static bool
 assign_ssl(bool newval, bool doit, GucSource source)
 {

src/backend/utils/misc/postgresql.conf.sample

@@ -69,6 +69,8 @@
 #unix_socket_group = ''			# (change requires restart)
 #unix_socket_permissions = 0777		# begin with 0 to use octal notation
 					# (change requires restart)
+#bonjour = off				# advertise server via Bonjour
+					# (change requires restart)
 #bonjour_name = ''			# defaults to the computer name
 					# (change requires restart)
 

src/include/postmaster/postmaster.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/postmaster/postmaster.h,v 1.20 2009/05/05 19:59:00 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/postmaster/postmaster.h,v 1.21 2009/09/08 17:08:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -27,6 +27,7 @@ extern int	PreAuthDelay;
 extern int	AuthenticationTimeout;
 extern bool Log_connections;
 extern bool log_hostname;
+extern bool enable_bonjour;
 extern char *bonjour_name;
 
 #ifdef WIN32