Fixes for --enable-named-pipe

Docs/manual.texi:
  Added information about --enable-named-pipe

Docs/manual.texi

@@ -6349,6 +6349,9 @@ Optimized binary with support for symbolic links, BDB and InnoDB tables.
 Like @code{mysqld-max}, but compiled with support for named pipes.
 @end multitable
 
+Starting from 3.23.50, named pipes are only enabled if start mysqld with
+@code{--enable-named-pipe}.
+
 All of the above binaries are optimized for the Pentium Pro processor but
 should work on any Intel processor >= i386.
 
@@ -10334,6 +10337,11 @@ You can force a MySQL client to use named pipes by specifying the
 @code{--pipe} option or by specifying @code{.} as the host name.  Use the 
 @code{--socket} option to specify the name of the pipe.
 
+Note that starting from 3.23.50, named pipes are only enabled if start
+mysqld with @code{--enable-named-pipe}.  This is because some users have
+experienced problems shutting down the MySQL server when one uses named
+pipes.
+
 You can test whether or not MySQL is working by executing the
 following commands:
 
@@ -10613,6 +10621,9 @@ option to the new MySQL clients or create an option file
 host = localhost
 @end example
 
+Starting from 3.23.50, named pipes are only enabled if start mysqld with
+@code{--enable-named-pipe}.
+
 @item @code{Access denied for user} error
 If you get the error @code{Access denied for user: 'some-user@@unknown'
 to database 'mysql'} when accessing a MySQL server on the same
@@ -14724,6 +14735,10 @@ Enable system locking.  Note that if you use this option on a system
 which a not fully working lockd() (as on Linux) you will easily get
 mysqld to deadlock.
 
+@item --enable-named-pipe
+Enable support for named pipes; This only works on NT and newer windows
+versions.
+
 @item -T, --exit-info
 This is a bit mask of different flags one can use for debugging the
 mysqld server;  One should not use this option if one doesn't know
@@ -43394,12 +43409,13 @@ are used if you don't specify a hostname or if you specify the special
 hostname @code{localhost}.
 
 On Windows you can connect only with TCP/IP if the @code{mysqld} server
-is running on Win95/Win98. If it's running on NT, you can also connect
-with named pipes.  The name of the named pipe is MySQL.  If you
-don't give a hostname when connecting to @code{mysqld}, a MySQL client
-will first try to connect to the named pipe, and if this doesn't work it
-will connect to the TCP/IP port.  You can force the use of named pipes
-on Windows by using @code{.} as the hostname.
+is running on Win95/Win98. If mysqld is running on NT and started with
+@code{enable-named-pipe}, you can also connect with named pipes.  The
+name of the named pipe is MySQL.  If you don't give a hostname when
+connecting to @code{mysqld}, a MySQL client will first try to connect to
+the named pipe, and if this doesn't work it will connect to the TCP/IP
+port.  You can force the use of named pipes on Windows by using @code{.} 
+as the hostname.
 
 The error (2002) @code{Can't connect to ...} normally means that there
 isn't a MySQL server running on the system or that you are
@@ -46897,6 +46913,10 @@ not yet 100% confident in this code.
 @appendixsubsec Changes in release 3.23.50
 @itemize @bullet
 @item
+Because of problems on shutdown we have now disabled named pipes on
+windows by default.  One can enable this with by starting mysqld with
+@code{--enable-named-pipe}.
+@item
 Fixed bug when using @code{WHERE key_column = 'J' or key_column='j'}.
 @item
 Fixed core-dump bug when using @code{--log-bin} with @code{LOAD DATA

sql/mysqld.cc

@@ -155,6 +155,7 @@ static SECURITY_DESCRIPTOR sdPipeDescriptor;
 static HANDLE hPipe = INVALID_HANDLE_VALUE;
 static pthread_cond_t COND_handler_count;
 static uint handler_count;
+static bool opt_enable_named_pipe = 0;
 #endif
 #ifdef __WIN__
 static bool opt_console=0,start_mode=0;
@@ -220,9 +221,6 @@ static bool opt_log,opt_update_log,opt_bin_log,opt_slow_log,opt_noacl,
 	    opt_disable_networking=0, opt_bootstrap=0,opt_skip_show_db=0,
 	    opt_myisam_log=0,
             opt_large_files=sizeof(my_off_t) > 4;
-#ifdef __NT__
-static bool opt_enable_named_pipe = 0;
-#endif
 bool opt_sql_bin_update = 0, opt_log_slave_updates = 0, opt_safe_show_db=0,
      opt_safe_user_create=0;
 FILE *bootstrap_file=0;
@@ -472,7 +470,7 @@ static void close_connections(void)
     }
   }
 #ifdef __NT__
-if ( hPipe != INVALID_HANDLE_VALUE && opt_enable_named_pipe )
+if (hPipe != INVALID_HANDLE_VALUE && opt_enable_named_pipe)
 {
   HANDLE temp;
   DBUG_PRINT( "quit", ("Closing named pipes") );
@@ -926,8 +924,8 @@ static void server_init(void)
 
 #ifdef __NT__
   /* create named pipe */
-  if (Service.IsNT() && mysql_unix_port[0] && !opt_bootstrap
-	  && opt_enable_named_pipe)
+  if (Service.IsNT() && mysql_unix_port[0] && !opt_bootstrap &&
+      opt_enable_named_pipe)
   {
     sprintf( szPipeName, "\\\\.\\pipe\\%s", mysql_unix_port );
     ZeroMemory( &saPipeSecurity, sizeof(saPipeSecurity) );
@@ -2004,10 +2002,10 @@ The server will not act as a slave.");
   fflush(stdout);
 
 #ifdef __NT__
-  if ((hPipe == INVALID_HANDLE_VALUE && !have_tcpip ) ||
-	  (hPipe == INVALID_HANDLE_VALUE && opt_disable_networking) )
+  if (hPipe == INVALID_HANDLE_VALUE &&
+      (!have_tcpip || opt_disable_networking)
   {
-    sql_print_error("TCP/IP or enable-named-pipe should be configured on NT OS");
+    sql_print_error("TCP/IP or --enable-named-pipe should be configured on NT OS");
 	unireg_abort(1);
   }
   else
@@ -2017,7 +2015,7 @@ The server will not act as a slave.");
     {
       pthread_t hThread;
       handler_count=0;
-      if ( hPipe != INVALID_HANDLE_VALUE && opt_enable_named_pipe )
+      if (hPipe != INVALID_HANDLE_VALUE && opt_enable_named_pipe)
       {
 	handler_count++;
 	if (pthread_create(&hThread,&connection_attrib,
@@ -2510,9 +2508,9 @@ pthread_handler_decl(handle_connections_namedpipes,arg)
     fConnected = ConnectNamedPipe( hPipe, NULL );
     if (abort_loop)
       break;
-    if ( !fConnected )
+    if (!fConnected)
       fConnected = GetLastError() == ERROR_PIPE_CONNECTED;
-    if ( !fConnected )
+    if (!fConnected)
     {
       CloseHandle( hPipe );
       if ((hPipe = CreateNamedPipe(szPipeName,
@@ -2550,7 +2548,7 @@ pthread_handler_decl(handle_connections_namedpipes,arg)
       continue;					// We have to try again
     }
 
-    if ( !(thd = new THD))
+    if (!(thd = new THD))
     {
       DisconnectNamedPipe( hConnectedPipe );
       CloseHandle( hConnectedPipe );
@@ -2634,9 +2632,7 @@ enum options {
 	       OPT_SKIP_STACK_TRACE, OPT_SKIP_SYMLINKS,
 	       OPT_MAX_BINLOG_DUMP_EVENTS, OPT_SPORADIC_BINLOG_DUMP_FAIL,
 	       OPT_SAFE_USER_CREATE, OPT_SQL_MODE,
-#ifdef __NT__
-		   OPT_HAVE_NAMED_PIPE,
-#endif
+	       OPT_HAVE_NAMED_PIPE,
 	       OPT_SLAVE_SKIP_ERRORS, OPT_LOCAL_INFILE
 };
 
@@ -2670,6 +2666,7 @@ static struct option long_options[] = {
   {"delay-key-write-for-all-tables",
                             no_argument,       0, (int) OPT_DELAY_KEY_WRITE},
   {"enable-locking",        no_argument,       0, (int) OPT_ENABLE_LOCK},
+  {"enable-named-pipe",     no_argument,       0, (int) OPT_HAVE_NAMED_PIPE},
   {"exit-info",             optional_argument, 0, 'T'},
   {"flush",                 no_argument,       0, (int) OPT_FLUSH},
 #ifdef HAVE_GEMINI_DB
@@ -2766,9 +2763,6 @@ static struct option long_options[] = {
   {"skip-host-cache",       no_argument,       0, (int) OPT_SKIP_HOST_CACHE},
   {"skip-name-resolve",     no_argument,       0, (int) OPT_SKIP_RESOLVE},
   {"skip-networking",       no_argument,       0, (int) OPT_SKIP_NETWORKING},
-#ifdef __NT__
-  {"enable-named-pipe",     no_argument,       0, (int) OPT_HAVE_NAMED_PIPE},
-#endif
   {"skip-new",              no_argument,       0, (int) OPT_SKIP_NEW},
   {"skip-safemalloc",	    no_argument,       0, (int) OPT_SKIP_SAFEMALLOC},
   {"skip-show-database",    no_argument,       0, (int) OPT_SKIP_SHOW_DB},
@@ -3043,6 +3037,9 @@ struct show_var_st init_vars[]= {
   {"myisam_max_sort_file_size",(char*) &myisam_max_sort_file_size,  SHOW_LONG},
   {"myisam_recover_options",  (char*) &myisam_recover_options,      SHOW_LONG},
   {"myisam_sort_buffer_size", (char*) &myisam_sort_buffer_size,     SHOW_LONG},
+#ifdef __NT__
+  {"named_pipe",	      (char*) &opt_enable_named_pipe,       SHOW_BOOL},
+#endif
   {"net_buffer_length",       (char*) &net_buffer_length,           SHOW_LONG},
   {"net_read_timeout",        (char*) &net_read_timeout,	    SHOW_LONG},
   {"net_retry_count",         (char*) &mysqld_net_retry_count,      SHOW_LONG},
@@ -3059,9 +3056,6 @@ struct show_var_st init_vars[]= {
   {"slave_net_timeout",       (char*) &slave_net_timeout,	    SHOW_LONG},
   {"skip_locking",            (char*) &my_disable_locking,          SHOW_MY_BOOL},
   {"skip_networking",         (char*) &opt_disable_networking,      SHOW_BOOL},
-#ifdef __NT__
-  {"enable_named_pipe",       (char*) &opt_enable_named_pipe,      SHOW_BOOL},
-#endif
   {"skip_show_database",      (char*) &opt_skip_show_db,            SHOW_BOOL},
   {"slow_launch_time",        (char*) &slow_launch_time,            SHOW_LONG},
   {"socket",                  (char*) &mysql_unix_port,             SHOW_CHAR_PTR},
@@ -3437,7 +3431,7 @@ static void set_options(void)
   }
 #else
   const char *tmpenv;
-  if ( !(tmpenv = getenv("MY_BASEDIR_VERSION")))
+  if (!(tmpenv = getenv("MY_BASEDIR_VERSION")))
     tmpenv = DEFAULT_MYSQL_HOME;
   (void) strmov( mysql_home, tmpenv );
 #endif
@@ -3770,11 +3764,6 @@ static void get_options(int argc,char **argv)
       opt_disable_networking=1;
       mysql_port=0;
       break;
-#ifdef __NT__ 
-    case (int) OPT_HAVE_NAMED_PIPE:
-      opt_enable_named_pipe=1;
-      break;
-#endif
     case (int) OPT_SKIP_SHOW_DB:
       opt_skip_show_db=1;
       opt_specialflag|=SPECIAL_SKIP_SHOW_DB;
@@ -3829,6 +3818,11 @@ static void get_options(int argc,char **argv)
     case (int) OPT_INIT_FILE:
       opt_init_file=optarg;
       break;
+    case (int) OPT_HAVE_NAMED_PIPE:
+#if __NT__
+      opt_enable_named_pipe=1;
+#endif
+      break;
 #ifdef __WIN__
     case (int) OPT_STANDALONE:		/* Dummy option for NT */
       break;