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 static bool pcap_cache_add(const char *name, const char *comment, const char *location)
  87 {
  88         NTSTATUS status;
  89         time_t t = time_mono(NULL);
  90
  91         status = printer_list_set_printer(talloc_tos(), name, comment, location, t);
  92         return NT_STATUS_IS_OK(status);
  93 }
  94
  95 bool pcap_cache_loaded(void)
  96 {
  97         NTSTATUS status;
  98         time_t last;
  99
 100         status = printer_list_get_last_refresh(&last);
 101         return NT_STATUS_IS_OK(status);
 102 }
 103
 104 bool pcap_cache_replace(const struct pcap_cache *pcache)
 105 {
 106         const struct pcap_cache *p;
 107         NTSTATUS status;
 108
 109         status = printer_list_mark_reload();
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 DEBUG(0, ("Failed to mark printer list for reload!\n"));
 112                 return false;
 113         }
 114
 115         for (p = pcache; p; p = p->next) {
 116                 pcap_cache_add(p->name, p->comment, p->location);
 117         }
 118
 119         status = printer_list_clean_old();
 120         if (!NT_STATUS_IS_OK(status)) {
 121                 DEBUG(0, ("Failed to cleanup printer list!\n"));
 122                 return false;
 123         }
 124
 125         return true;
 126 }
 127
 128 void pcap_cache_reload(struct tevent_context *ev,
 129                        struct messaging_context *msg_ctx,
 130                        void (*post_cache_fill_fn)(struct tevent_context *,
 131                                                   struct messaging_context *))
 132 {
 133         const char *pcap_name = lp_printcapname();
 134         bool pcap_reloaded = False;
 135         bool post_cache_fill_fn_handled = false;
 136         struct pcap_cache *pcache = NULL;
 137
 138         DEBUG(3, ("reloading printcap cache\n"));
 139
 140         /* only go looking if no printcap name supplied */
 141         if (pcap_name == NULL || *pcap_name == 0) {
 142                 DEBUG(0, ("No printcap file name configured!\n"));
 143                 return;
 144         }
 145
 146 #ifdef HAVE_CUPS
 147         if (strequal(pcap_name, "cups")) {
 148                 pcap_reloaded = cups_cache_reload(ev, msg_ctx,
 149                                                   post_cache_fill_fn);
 150                 /*
 151                  * cups_cache_reload() is async and calls post_cache_fill_fn()
 152                  * on successful completion
 153                  */
 154                 post_cache_fill_fn_handled = true;
 155                 goto done;
 156         }
 157 #endif
 158
 159 #ifdef HAVE_IPRINT
 160         if (strequal(pcap_name, "iprint")) {
 161                 pcap_reloaded = iprint_cache_reload(&pcache);
 162                 goto done;
 163         }
 164 #endif
 165
 166 #if defined(SYSV) || defined(HPUX)
 167         if (strequal(pcap_name, "lpstat")) {
 168                 pcap_reloaded = sysv_cache_reload(&pcache);
 169                 goto done;
 170         }
 171 #endif
 172
 173 #ifdef AIX
 174         if (strstr_m(pcap_name, "/qconfig") != NULL) {
 175                 pcap_reloaded = aix_cache_reload(&pcache);
 176                 goto done;
 177         }
 178 #endif
 179
 180         pcap_reloaded = std_pcap_cache_reload(pcap_name, &pcache);
 181
 182 done:
 183         DEBUG(3, ("reload status: %s\n", (pcap_reloaded) ? "ok" : "error"));
 184
 185         if ((pcap_reloaded) && (post_cache_fill_fn_handled == false)) {
 186                 /* cleanup old entries only if the operation was successful,
 187                  * otherwise keep around the old entries until we can
 188                  * successfully reload */
 189
 190                 if (!pcap_cache_replace(pcache)) {
 191                         DEBUG(0, ("Failed to replace printer list!\n"));
 192                 }
 193
 194                 if (post_cache_fill_fn != NULL) {
 195                         post_cache_fill_fn(ev, msg_ctx);
 196                 }
 197         }
 198         pcap_cache_destroy_specific(&pcache);
 199
 200         return;
 201 }
 202
 203
 204 bool pcap_printername_ok(const char *printername)
 205 {
 206         NTSTATUS status;
 207
 208         status = printer_list_get_printer(talloc_tos(), printername, NULL, NULL, 0);
 209         return NT_STATUS_IS_OK(status);
 210 }
 211
 212 /***************************************************************************
 213 run a function on each printer name in the printcap file.
 214 ***************************************************************************/
 215
 216 void pcap_printer_fn_specific(const struct pcap_cache *pc,
 217                         void (*fn)(const char *, const char *, const char *, void *),
 218                         void *pdata)
 219 {
 220         const struct pcap_cache *p;
 221
 222         for (p = pc; p != NULL; p = p->next)
 223                 fn(p->name, p->comment, p->location, pdata);
 224
 225         return;
 226 }
 227
 228 void pcap_printer_read_fn(void (*fn)(const char *, const char *, const char *, void *), void *pdata)
 229 {
 230         NTSTATUS status;
 231
 232         status = printer_list_read_run_fn(fn, pdata);
 233         if (!NT_STATUS_IS_OK(status)) {
 234                 DEBUG(3, ("Failed to run fn for all printers!\n"));
 235         }
 236         return;
 237 }