listening addresses

I think this (undocumented!) patch implements what Tom and I thrashed
out under this heading on -hackers.

It would make the default configuration listen on localhost, and allow
'*' as a listen address to be every available listen interface. -i would
correspond to this latter setting. It also will not now error out unless
there is absolutely no socket, Unix or TCP, to listen on. To turn off
all TCP sockets you would use -h '' or listen_addresses = ''.

Submitted for review.

cheers

andrew
Index: src/backend/postmaster/postmaster.c
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/backend/postmaster/postmaster.c,v
retrieving revision 1.375
diff -c -r1.375 postmaster.c
*** src/backend/postmaster/postmaster.c    15 Mar 2004 16:18:42 -0000    1.375
--- src/backend/postmaster/postmaster.c    21 Mar 2004 16:48:05 -0000
***************
*** 149,155 ****
  /* The socket number we are listening for connections on */
  int            PostPortNumber;
  char       *UnixSocketDir;
! char       *VirtualHost;

  /*
   * MaxBackends is the limit on the number of backends we can start.
--- 149,155 ----
  /* The socket number we are listening for connections on */
  int            PostPortNumber;
  char       *UnixSocketDir;
! char       *ListenAddresses = "localhost";

  /*
   * MaxBackends is the limit on the number of backends we can start.
***************
*** 202,208 ****
  static int    SendStop = false;

  /* still more option variables */
- bool        NetServer = false;    /* listen on TCP/IP */
  bool        EnableSSL = false;
  bool        SilentMode = false; /* silent mode (-S) */

--- 202,207 ----
***************
*** 412,417 ****
--- 411,417 ----
      char        original_extraoptions[MAXPGPATH];
      char       *potential_DataDir = NULL;
      int            i;
+     bool        NetServer = false;

      *original_extraoptions = '\0';

***************
*** 513,522 ****
                  SetConfigOption("fsync", "false", PGC_POSTMASTER, PGC_S_ARGV);
                  break;
              case 'h':
!                 SetConfigOption("virtual_host", optarg, PGC_POSTMASTER, PGC_S_ARGV);
                  break;
              case 'i':
!                 SetConfigOption("tcpip_socket", "true", PGC_POSTMASTER, PGC_S_ARGV);
                  break;
              case 'k':
                  SetConfigOption("unix_socket_directory", optarg, PGC_POSTMASTER, PGC_S_ARGV);
--- 513,522 ----
                  SetConfigOption("fsync", "false", PGC_POSTMASTER, PGC_S_ARGV);
                  break;
              case 'h':
!                 SetConfigOption("listen_addresses", optarg, PGC_POSTMASTER, PGC_S_ARGV);
                  break;
              case 'i':
!                 SetConfigOption("listen_addresses", "*", PGC_POSTMASTER, PGC_S_ARGV);
                  break;
              case 'k':
                  SetConfigOption("unix_socket_directory", optarg, PGC_POSTMASTER, PGC_S_ARGV);
***************
*** 700,705 ****
--- 700,717 ----
                  (errmsg("%s: could not locate postgres executable",
                          progname)));

+     /*
+      * check if ListenAddresses is empty or all spaces
+      */
+     for (i=strlen(ListenAddresses)-1; i >= 0; i--)
+     {
+         if (ListenAddresses[i] != ' ')
+         {
+             NetServer = true;
+             break;
+         }
+     }
+
      /*
       * Initialize SSL library, if specified.
       */
***************
*** 755,767 ****

      if (NetServer)
      {
!         if (VirtualHost && VirtualHost[0])
          {
              char       *curhost,
                         *endptr;
              char        c = 0;

!             curhost = VirtualHost;
              for (;;)
              {
                  while (*curhost == ' ') /* skip any extra spaces */
--- 767,779 ----

      if (NetServer)
      {
!         if (strcmp(ListenAddresses,"*") != 0)
          {
              char       *curhost,
                         *endptr;
              char        c = 0;

!             curhost = ListenAddresses;
              for (;;)
              {
                  while (*curhost == ' ') /* skip any extra spaces */
***************
*** 779,785 ****
                                            UnixSocketDir,
                                            ListenSocket, MAXLISTEN);
                  if (status != STATUS_OK)
!                     ereport(FATAL,
                       (errmsg("could not create listen socket for \"%s\"",
                               curhost)));
                  if (endptr)
--- 791,797 ----
                                            UnixSocketDir,
                                            ListenSocket, MAXLISTEN);
                  if (status != STATUS_OK)
!                     ereport(WARNING,
                       (errmsg("could not create listen socket for \"%s\"",
                               curhost)));
                  if (endptr)
***************
*** 798,804 ****
                                        UnixSocketDir,
                                        ListenSocket, MAXLISTEN);
              if (status != STATUS_OK)
!                 ereport(FATAL,
                        (errmsg("could not create TCP/IP listen socket")));
          }

--- 810,816 ----
                                        UnixSocketDir,
                                        ListenSocket, MAXLISTEN);
              if (status != STATUS_OK)
!                 ereport(WARNING,
                        (errmsg("could not create TCP/IP listen socket")));
          }

***************
*** 822,830 ****
                                UnixSocketDir,
                                ListenSocket, MAXLISTEN);
      if (status != STATUS_OK)
!         ereport(FATAL,
                  (errmsg("could not create Unix-domain socket")));
  #endif

      XLOGPathInit();

--- 834,850 ----
                                UnixSocketDir,
                                ListenSocket, MAXLISTEN);
      if (status != STATUS_OK)
!         ereport(WARNING,
                  (errmsg("could not create Unix-domain socket")));
  #endif
+
+     /*
+      * check that we have some socket to talk on
+      */
+
+     if (ListenSocket[0] == -1)
+         ereport(FATAL,
+                 (errmsg("not listening on any socket")));

      XLOGPathInit();

Index: src/backend/utils/misc/guc.c
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/backend/utils/misc/guc.c,v
retrieving revision 1.190
diff -c -r1.190 guc.c
*** src/backend/utils/misc/guc.c    15 Mar 2004 15:56:24 -0000    1.190
--- src/backend/utils/misc/guc.c    21 Mar 2004 16:48:06 -0000
***************
*** 444,457 ****
          false, NULL, NULL
      },
      {
-         {"tcpip_socket", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
-             gettext_noop("Makes the server accept TCP/IP connections."),
-             NULL
-         },
-         &NetServer,
-         false, NULL, NULL
-     },
-     {
          {"ssl", PGC_POSTMASTER, CONN_AUTH_SECURITY,
              gettext_noop("Enables SSL connections."),
              NULL
--- 444,449 ----
***************
*** 1711,1722 ****
      },

      {
!         {"virtual_host", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
!             gettext_noop("Sets the host name or IP address to listen to."),
              NULL
          },
!         &VirtualHost,
!         "", NULL, NULL
      },

      {
--- 1703,1714 ----
      },

      {
!         {"listen_addresses", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
!             gettext_noop("Sets the host name or IP addresses to listen to."),
              NULL
          },
!         &ListenAddresses,
!         "localhost", NULL, NULL
      },

      {
Index: src/backend/utils/misc/postgresql.conf.sample
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/backend/utils/misc/postgresql.conf.sample,v
retrieving revision 1.108
diff -c -r1.108 postgresql.conf.sample
*** src/backend/utils/misc/postgresql.conf.sample    15 Mar 2004 15:56:26 -0000    1.108
--- src/backend/utils/misc/postgresql.conf.sample    21 Mar 2004 16:48:06 -0000
***************
*** 27,33 ****

  # - Connection Settings -

- #tcpip_socket = false
  #max_connections = 100
      # note: increasing max_connections costs about 500 bytes of shared
      # memory per connection slot, in addition to costs from shared_buffers
--- 27,32 ----
***************
*** 37,43 ****
  #unix_socket_directory = ''
  #unix_socket_group = ''
  #unix_socket_permissions = 0777    # octal
! #virtual_host = ''        # what interface to listen on; defaults to any
  #rendezvous_name = ''        # defaults to the computer name

  # - Security & Authentication -
--- 36,43 ----
  #unix_socket_directory = ''
  #unix_socket_group = ''
  #unix_socket_permissions = 0777    # octal
! #listen_addresses = 'localhost'    # what interface to listen on;
!                 # defaults to localhost, '*' = any
  #rendezvous_name = ''        # defaults to the computer name

  # - Security & Authentication -
Index: src/include/miscadmin.h
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/include/miscadmin.h,v
retrieving revision 1.153
diff -c -r1.153 miscadmin.h
*** src/include/miscadmin.h    10 Feb 2004 03:42:45 -0000    1.153
--- src/include/miscadmin.h    21 Mar 2004 16:48:06 -0000
***************
*** 212,218 ****
   *    A few postmaster startup options are exported here so the
   *    configuration file processor can access them.
   */
- extern bool NetServer;
  extern bool EnableSSL;
  extern bool SilentMode;
  extern int    MaxBackends;
--- 212,217 ----
***************
*** 222,228 ****
  extern int    Unix_socket_permissions;
  extern char *Unix_socket_group;
  extern char *UnixSocketDir;
! extern char *VirtualHost;


  /*****************************************************************************
--- 221,227 ----
  extern int    Unix_socket_permissions;
  extern char *Unix_socket_group;
  extern char *UnixSocketDir;
! extern char *ListenAddresses;


  /*****************************************************************************