2 * Copyright (c) 1995, the EUROPAGATE consortium (see below).
4 * The EUROPAGATE consortium members are:
6 * University College Dublin
7 * Danmarks Teknologiske Videnscenter
8 * An Chomhairle Leabharlanna
9 * Consejo Superior de Investigaciones Cientificas
11 * Permission to use, copy, modify, distribute, and sell this software and
12 * its documentation, in whole or in part, for any purpose, is hereby granted,
15 * 1. This copyright and permission notice appear in all copies of the
16 * software and its documentation. Notices of copyright or attribution
17 * which appear at the beginning of any file must remain unchanged.
19 * 2. The names of EUROPAGATE or the project partners may not be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
23 * 3. Users of this software (implementors and gateway operators) agree to
24 * inform the EUROPAGATE consortium of their use of the software. This
25 * information will be used to evaluate the EUROPAGATE project and the
26 * software, and to plan further developments. The consortium may use
27 * the information in later publications.
29 * 4. Users of this software agree to make their best efforts, when
30 * documenting their use of the software, to acknowledge the EUROPAGATE
31 * consortium, and the role played by the software in their work.
33 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
34 * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
35 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
36 * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE
37 * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF
38 * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
39 * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND
40 * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
41 * USE OR PERFORMANCE OF THIS SOFTWARE.
44 /* Gateway kernel - Z39.50 Persistence
48 * Revision 1.8 1995/05/16 09:40:43 adam
49 * LICENSE. Setting of CCL token names (and/or/not/set) in read_kernel_res.
51 * Revision 1.7 1995/05/03 16:34:19 adam
52 * CCL def command, i.e. user definitions - saved as resource files.
54 * Revision 1.6 1995/05/03 07:37:44 adam
55 * CCL commands stop/continue implemented. New functions gw_res_{int,bool}
56 * are used when possible.
58 * Revision 1.5 1995/05/02 15:26:00 adam
59 * Monitor observes death of child (email kernel). The number
60 * of simultanous processes is controlled now. Email requests are
61 * queued if necessary. This scheme should only be forced if no kernels
64 * Revision 1.4 1995/04/20 16:10:46 adam
65 * Modified to work with non-blocking zass-api. Not using non-blocking
68 * Revision 1.3 1995/04/19 13:19:09 adam
69 * New command: account - for authentication.
71 * Revision 1.2 1995/04/19 10:46:19 adam
72 * Persistency works much better now. New command: status - history-like
74 * Revision 1.1 1995/04/19 07:31:10 adam
75 * First work on Z39.50 persistence.
89 static int fgetsx (char *buf, int size, FILE *inf)
93 if (!fgets (buf, size, inf))
95 if ((cp = strchr (buf, '\n')))
100 static int set_change;
102 static int obtain_set (ZASS zass, struct gw_user_set *set)
104 const struct zass_searchent *p;
106 p = zass_search (zass, set->rpn, set->name, set->database, NULL);
109 if (p->errcode != -1)
111 if (p->num != set->hits)
113 set->present_flag = 1;
115 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Set %s researched", set->name);
119 static int obtain_sets (ZASS zass, struct ccl_rpn_node *rpn,
120 struct gw_user_set *sets)
122 struct gw_user_set *set;
131 if ((r=obtain_sets (zass, rpn->u.p[0], sets)))
133 return obtain_sets (zass, rpn->u.p[1], sets);
137 set = user_set_search (rpn->u.setname);
140 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Set %s not there at all",
144 if (set->present_flag)
146 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Set %s already there",
151 return obtain_set (zass, set);
154 const struct zass_searchent *zass_p_search (ZASS zass,
155 struct ccl_rpn_node *rpn,
156 const char *result_set,
157 const char *database,
158 struct gw_user_set *sets)
163 r = obtain_sets (zass, rpn, sets);
166 return zass_search (zass, rpn, (char*) result_set, (char*) database, NULL);
169 const struct zass_presentent *zass_p_present (ZASS zass,
170 const char *result_set, int offset, int number)
172 struct gw_user_set *set;
174 set = user_set_search (result_set);
177 if (!set->present_flag)
179 const struct zass_searchent *p;
181 p = zass_p_search (zass, set->rpn, result_set, set->database,
186 return zass_present (zass, (char*) result_set, offset, number, NULL);
189 struct ccl_rpn_node *load_rpn (char *buf, FILE *inf)
191 struct ccl_rpn_node *rpn;
192 struct ccl_rpn_attr **attrp;
193 int type, value, no_read;
196 if (!fgetsx (buf, 1024, inf))
198 rpn = malloc (sizeof (*rpn));
204 rpn->kind = CCL_RPN_AND;
205 rpn->u.p[0] = load_rpn (buf, inf);
206 rpn->u.p[1] = load_rpn (buf, inf);
209 rpn->kind = CCL_RPN_OR;
210 rpn->u.p[0] = load_rpn (buf, inf);
211 rpn->u.p[1] = load_rpn (buf, inf);
214 rpn->kind = CCL_RPN_NOT;
215 rpn->u.p[0] = load_rpn (buf, inf);
216 rpn->u.p[1] = load_rpn (buf, inf);
219 rpn->kind = CCL_RPN_PROX;
220 rpn->u.p[0] = load_rpn (buf, inf);
221 rpn->u.p[1] = load_rpn (buf, inf);
224 rpn->kind = CCL_RPN_TERM;
226 rpn->u.t.term = gw_strdup (buf+2);
227 attrp = &rpn->u.t.attr_list;
228 if (!fgetsx (buf, 1024, inf))
231 while (sscanf (cp, "%d %d%n", &type, &value, &no_read) > 1)
233 *attrp = malloc (sizeof(**attrp));
234 (*attrp)->type = type;
235 (*attrp)->value = value;
236 attrp = &(*attrp)->next;
242 rpn->kind = CCL_RPN_SET;
243 rpn->u.setname = gw_strdup (buf+2);
252 int load_p_state (int userid)
260 struct gw_user_set *set;
262 sprintf (fname, "user.%d.p", userid);
264 inf = fopen (fname, "r");
267 gw_log (GW_LOG_WARN|GW_LOG_ERRNO, KERNEL_LOG,
268 "Couldn't open %s", fname);
271 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
272 "Reading persistence file %s", fname);
274 if (!fgetsx (fline, 1024, inf))
276 if (sscanf (fline, "%s", info.target) != 1)
280 if (!fgetsx (fline, 1024, inf))
282 if (sscanf (fline, "%s", info.account) != 1)
283 *info.account = '\0';
285 if (!fgetsx (fline, 1024, inf))
287 free (info.database);
288 info.database = gw_strdup (fline);
290 if (!fgetsx (fline, 1024, inf))
292 if (sscanf (fline, "%d", &info.setno) != 1)
294 if (!fgetsx (fline, 1024, inf))
296 if (sscanf (fline, "%d", &info.next_position) != 1)
298 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
299 "Reading persistence file %s (2)", fname);
303 while (fgetsx (fline, 1024, inf))
305 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
306 "Reading persistence file %s (3)", fname);
307 if (sscanf (fline, "%s %d %s", resultname, &hits, database) != 3)
309 if (!fgetsx (fline, 1024, inf)) /* search string */
311 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
312 "Adding %s, %d hits, database %s",
313 resultname, hits, database);
314 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Search string %s", fline);
315 set = user_set_add (resultname, hits, database, NULL, 0, fline);
316 set->rpn = load_rpn (fline, inf);
317 ccl_pr_tree (set->rpn, stderr);
318 fgetsx (fline, 1024, inf);
321 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Finished reading %s", fname);
325 static void save_rpn (struct ccl_rpn_node *rpn, FILE *of)
327 struct ccl_rpn_attr *attr;
333 save_rpn (rpn->u.p[0], of);
334 save_rpn (rpn->u.p[1], of);
338 save_rpn (rpn->u.p[0], of);
339 save_rpn (rpn->u.p[1], of);
343 save_rpn (rpn->u.p[0], of);
344 save_rpn (rpn->u.p[1], of);
348 save_rpn (rpn->u.p[0], of);
349 save_rpn (rpn->u.p[1], of);
352 fprintf (of, "T %s\n", rpn->u.t.term);
353 for (attr = rpn->u.t.attr_list; attr; attr = attr->next)
354 fprintf (of, "%d %d ", attr->type, attr->value);
358 fprintf (of, "S %s\n", rpn->u.setname);
362 static void save_sets (FILE *of, struct gw_user_set *sp)
366 save_sets (of, sp->prev);
367 fprintf (of, "%s %d %s\n%s\n", sp->name, sp->hits, sp->database,
369 save_rpn (sp->rpn, of);
373 int save_p_state (int userid)
378 sprintf (fname, "user.%d.p", userid);
380 of = fopen (fname, "w");
383 gw_log (GW_LOG_WARN|GW_LOG_ERRNO, KERNEL_LOG,
384 "Couldn't open %s", fname);
387 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Writing persistence file %s", fname);
388 fprintf (of, "%s\n%s\n%s\n%d\n%d\n", info.target, info.account,
389 info.database, info.setno, info.next_position);
390 save_sets (of, info.sets);
395 void del_p_state (int userid)
399 sprintf (fname, "user.%d.p", userid);