source3/smbd/server_reload.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7    Copyright (C) Volker Lendecke                1993-2007
   8    Copyright (C) Jeremy Allison                 1993-2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "nt_printing.h"
  28 #include "printing/pcap.h"
  29 #include "printing/load.h"
  30 #include "auth.h"
  31 #include "messages.h"
  32
  33 /****************************************************************************
  34  purge stale printers and reload from pre-populated pcap cache
  35 **************************************************************************/
  36 void reload_printers(struct tevent_context *ev,
  37                      struct messaging_context *msg_ctx)
  38 {
  39         struct auth_serversupplied_info *session_info = NULL;
  40         struct spoolss_PrinterInfo2 *pinfo2 = NULL;
  41         int n_services;
  42         int pnum;
  43         int snum;
  44         const char *pname;
  45         const char *sname;
  46         NTSTATUS status;
  47
  48         load_printers(ev, msg_ctx);
  49
  50         n_services = lp_numservices();
  51         pnum = lp_servicenumber(PRINTERS_NAME);
  52
  53         DEBUG(10, ("reloading printer services from pcap cache\n"));
  54
  55         status = make_session_info_system(talloc_tos(), &session_info);
  56         if (!NT_STATUS_IS_OK(status)) {
  57                 DEBUG(3, ("reload_printers: "
  58                           "Could not create system session_info\n"));
  59                 /* can't remove stale printers before we
  60                  * are fully initilized */
  61                 return;
  62         }
  63
  64         /*
  65          * Add default config for printers added to smb.conf file and remove
  66          * stale printers
  67          */
  68         for (snum = 0; snum < n_services; snum++) {
  69                 /* avoid removing PRINTERS_NAME */
  70                 if (snum == pnum) {
  71                         continue;
  72                 }
  73
  74                 /* skip no-printer services */
  75                 if (!(lp_snum_ok(snum) && lp_print_ok(snum))) {
  76                         continue;
  77                 }
  78
  79                 sname = lp_const_servicename(snum);
  80                 pname = lp_printername(snum);
  81
  82                 /* check printer, but avoid removing non-autoloaded printers */
  83                 if (lp_autoloaded(snum) && !pcap_printername_ok(pname)) {
  84                         DEBUG(3, ("removing stale printer %s\n", pname));
  85
  86                         if (is_printer_published(session_info, session_info,
  87                                                  msg_ctx,
  88                                                  NULL, lp_servicename(snum),
  89                                                  NULL, &pinfo2)) {
  90                                 nt_printer_publish(session_info,
  91                                                    session_info,
  92                                                    msg_ctx,
  93                                                    pinfo2,
  94                                                    DSPRINT_UNPUBLISH);
  95                                 TALLOC_FREE(pinfo2);
  96                         }
  97                         nt_printer_remove(session_info, session_info, msg_ctx,
  98                                           pname);
  99                         lp_killservice(snum);
 100                 } else {
 101                         DEBUG(8, ("Adding default registry entry for printer "
 102                                   "[%s], if it doesn't exist.\n", sname));
 103                         nt_printer_add(session_info, session_info, msg_ctx,
 104                                        sname);
 105                 }
 106         }
 107
 108         /* Make sure deleted printers are gone */
 109         load_printers(ev, msg_ctx);
 110
 111         TALLOC_FREE(session_info);
 112 }
 113
 114 /****************************************************************************
 115  Reload the services file.
 116 **************************************************************************/
 117
 118 bool reload_services(struct messaging_context *msg_ctx, int smb_sock,
 119                      bool test)
 120 {
 121         bool ret;
 122
 123         if (lp_loaded()) {
 124                 char *fname = lp_configfile();
 125                 if (file_exist(fname) &&
 126                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 127                         set_dyn_CONFIGFILE(fname);
 128                         test = False;
 129                 }
 130                 TALLOC_FREE(fname);
 131         }
 132
 133         reopen_logs();
 134
 135         if (test && !lp_file_list_changed())
 136                 return(True);
 137
 138         lp_killunused(conn_snum_used);
 139
 140         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 141
 142         /* perhaps the config filename is now set */
 143         if (!test)
 144                 reload_services(msg_ctx, smb_sock, True);
 145
 146         reopen_logs();
 147
 148         load_interfaces();
 149
 150         if (smb_sock != -1) {
 151                 set_socket_options(smb_sock,"SO_KEEPALIVE");
 152                 set_socket_options(smb_sock, lp_socket_options());
 153         }
 154
 155         mangle_reset_cache();
 156         reset_stat_cache();
 157
 158         /* this forces service parameters to be flushed */
 159         set_current_service(NULL,0,True);
 160
 161         return(ret);
 162 }
 163
 164 /****************************************************************************
 165  Notify smbds of new printcap data
 166 **************************************************************************/
 167 void reload_pcap_change_notify(struct tevent_context *ev,
 168                                struct messaging_context *msg_ctx)
 169 {
 170         /*
 171          * Reload the printers first in the background process so that
 172          * newly added printers get default values created in the registry.
 173          *
 174          * This will block the process for some time (~1 sec per printer), but
 175          * it doesn't block smbd's servering clients.
 176          */
 177         reload_printers(ev, msg_ctx);
 178
 179         message_send_all(msg_ctx, MSG_PRINTER_PCAP, NULL, 0, NULL);
 180 }