source3/printing/pcap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    printcap parsing
   4    Copyright (C) Karl Auer 1993-1998
   5
   6    Re-working by Martin Kiff, 1994
   7
   8    Re-written again by Andrew Tridgell
   9
  10    Modified for SVID support by Norm Jacobs, 1997
  11
  12    Modified for CUPS support by Michael Sweet, 1999
  13
  14    This program is free software; you can redistribute it and/or modify
  15    it under the terms of the GNU General Public License as published by
  16    the Free Software Foundation; either version 3 of the License, or
  17    (at your option) any later version.
  18
  19    This program is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26 */
  27
  28 /*
  29  *  Modified to call SVID/XPG4 support if printcap name is set to "lpstat"
  30  *  in smb.conf under Solaris.
  31  *
  32  *  Modified to call CUPS support if printcap name is set to "cups"
  33  *  in smb.conf.
  34  *
  35  *  Modified to call iPrint support if printcap name is set to "iprint"
  36  *  in smb.conf.
  37  */
  38
  39 #include "includes.h"
  40 #include "printing/pcap.h"
  41 #include "printer_list.h"
  42
  43 struct pcap_cache {
  44         char *name;
  45         char *comment;
  46         char *location;
  47         struct pcap_cache *next;
  48 };
  49
  50 bool pcap_cache_add_specific(struct pcap_cache **ppcache, const char *name, const char *comment, const char *location)
  51 {
  52         struct pcap_cache *p;
  53
  54         if (name == NULL || ((p = SMB_MALLOC_P(struct pcap_cache)) == NULL))
  55                 return false;
  56
  57         p->name = SMB_STRDUP(name);
  58         p->comment = (comment && *comment) ? SMB_STRDUP(comment) : NULL;
  59         p->location = (location && *location) ? SMB_STRDUP(location) : NULL;
  60
  61         DEBUG(11,("pcap_cache_add_specific: Adding name %s info %s, location: %s\n",
  62                 p->name, p->comment ? p->comment : "",
  63                 p->location ? p->location : ""));
  64
  65         p->next = *ppcache;
  66         *ppcache = p;
  67
  68         return true;
  69 }
  70
  71 void pcap_cache_destroy_specific(struct pcap_cache **pp_cache)
  72 {
  73         struct pcap_cache *p, *next;
  74
  75         for (p = *pp_cache; p != NULL; p = next) {
  76                 next = p->next;
  77
  78                 SAFE_FREE(p->name);
  79                 SAFE_FREE(p->comment);
  80                 SAFE_FREE(p->location);
  81                 SAFE_FREE(p);
  82         }
  83         *pp_cache = NULL;
  84 }
  85
  86 bool pcap_cache_replace(const struct pcap_cache *pcache)
  87 {
  88         const struct pcap_cache *p;
  89         NTSTATUS status;
  90         time_t t = time_mono(NULL);
  91
  92         status = printer_list_mark_reload();
  93         if (!NT_STATUS_IS_OK(status)) {
  94                 DEBUG(0, ("Failed to mark printer list for reload!\n"));
  95                 return false;
  96         }
  97
  98         for (p = pcache; p; p = p->next) {
  99                 status = printer_list_set_printer(talloc_tos(), p->name,
 100                                                   p->comment, p->location, t);
 101                 if (!NT_STATUS_IS_OK(status)) {
 102                         return false;
 103                 }
 104         }
 105
 106         status = printer_list_clean_old();
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 DEBUG(0, ("Failed to cleanup printer list!\n"));
 109                 return false;
 110         }
 111
 112         return true;
 113 }
 114
 115 void pcap_cache_reload(struct tevent_context *ev,
 116                        struct messaging_context *msg_ctx,
 117                        void (*post_cache_fill_fn)(struct tevent_context *,
 118                                                   struct messaging_context *))
 119 {
 120         const char *pcap_name = lp_printcapname();
 121         bool pcap_reloaded = False;
 122         bool post_cache_fill_fn_handled = false;
 123         struct pcap_cache *pcache = NULL;
 124
 125         DEBUG(3, ("reloading printcap cache\n"));
 126
 127         if (!lp_load_printers()) {
 128                 DBG_NOTICE("skipping reload - load printers disabled\n");
 129                 return;
 130         }
 131
 132         /* only go looking if a printcap name is supplied */
 133         if (pcap_name == NULL || *pcap_name == 0) {
 134                 DEBUG(0, ("No printcap file name configured!\n"));
 135                 return;
 136         }
 137
 138 #ifdef HAVE_CUPS
 139         if (strequal(pcap_name, "cups")) {
 140                 pcap_reloaded = cups_cache_reload(ev, msg_ctx,
 141                                                   post_cache_fill_fn);
 142                 /*
 143                  * cups_cache_reload() is async and calls post_cache_fill_fn()
 144                  * on successful completion
 145                  */
 146                 post_cache_fill_fn_handled = true;
 147                 goto done;
 148         }
 149 #endif
 150
 151 #ifdef HAVE_IPRINT
 152         if (strequal(pcap_name, "iprint")) {
 153                 pcap_reloaded = iprint_cache_reload(&pcache);
 154                 goto done;
 155         }
 156 #endif
 157
 158 #if defined(SYSV) || defined(HPUX)
 159         if (strequal(pcap_name, "lpstat")) {
 160                 pcap_reloaded = sysv_cache_reload(&pcache);
 161                 goto done;
 162         }
 163 #endif
 164
 165 #ifdef AIX
 166         if (strstr_m(pcap_name, "/qconfig") != NULL) {
 167                 pcap_reloaded = aix_cache_reload(&pcache);
 168                 goto done;
 169         }
 170 #endif
 171
 172         pcap_reloaded = std_pcap_cache_reload(pcap_name, &pcache);
 173
 174 /* Fix silly compiler warning about done not being used if none of the above
 175  * ifdefs are used */
 176 #if defined(HAVE_CUPS) || defined(HAVE_IPRINT) || defined(SYSV) || defined(HPUX) || defined(AIX)
 177 done:
 178 #endif
 179         DEBUG(3, ("reload status: %s\n", (pcap_reloaded) ? "ok" : "error"));
 180
 181         if ((pcap_reloaded) && (post_cache_fill_fn_handled == false)) {
 182                 /* cleanup old entries only if the operation was successful,
 183                  * otherwise keep around the old entries until we can
 184                  * successfully reload */
 185
 186                 if (!pcap_cache_replace(pcache)) {
 187                         DEBUG(0, ("Failed to replace printer list!\n"));
 188                 }
 189
 190                 if (post_cache_fill_fn != NULL) {
 191                         post_cache_fill_fn(ev, msg_ctx);
 192                 }
 193         }
 194         pcap_cache_destroy_specific(&pcache);
 195
 196         return;
 197 }
 198
 199 /***************************************************************************
 200 run a function on each printer name in the printcap file.
 201 ***************************************************************************/
 202
 203 void pcap_printer_fn_specific(const struct pcap_cache *pc,
 204                         void (*fn)(const char *, const char *, const char *, void *),
 205                         void *pdata)
 206 {
 207         const struct pcap_cache *p;
 208
 209         for (p = pc; p != NULL; p = p->next)
 210                 fn(p->name, p->comment, p->location, pdata);
 211
 212         return;
 213 }