2 * Copyright (C) 1995-1997, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.52 1997-11-18 10:05:08 adam
8 * Changed character map facility so that admin can specify character
9 * mapping files for each register type, w, p, etc.
11 * Revision 1.51 1997/10/27 14:33:06 adam
12 * Moved towards generic character mapping depending on "structure"
13 * field in abstract syntax file. Fixed a few memory leaks. Fixed
14 * bug with negative integers when doing searches with relational
17 * Revision 1.50 1997/09/29 09:08:36 adam
18 * Revised locking system to be thread safe for the server.
20 * Revision 1.49 1997/09/25 14:57:23 adam
23 * Revision 1.48 1997/09/17 12:19:19 adam
24 * Zebra version corresponds to YAZ version 1.4.
25 * Changed Zebra server so that it doesn't depend on global common_resource.
27 * Revision 1.47 1997/09/04 13:58:36 adam
28 * New retrieve/extract method tellf (added).
29 * Added O_BINARY for open calls.
31 * Revision 1.46 1997/07/28 08:30:47 adam
32 * Server returns diagnostic 14 when record doesn't exist.
34 * Revision 1.45 1996/12/23 15:30:45 adam
36 * Bug fix: result sets weren't deleted after server shut down.
38 * Revision 1.44 1996/12/11 12:08:01 adam
39 * Added better compression.
41 * Revision 1.43 1996/11/15 15:03:58 adam
42 * Logging of execution speed by using the times(2) call.
44 * Revision 1.42 1996/11/08 11:10:36 adam
45 * Buffers used during file match got bigger.
46 * Compressed ISAM support everywhere.
47 * Bug fixes regarding masking characters in queries.
48 * Redesigned Regexp-2 queries.
50 * Revision 1.41 1996/10/29 14:09:56 adam
51 * Use of cisam system - enabled if setting isamc is 1.
53 * Revision 1.40 1996/06/04 10:19:02 adam
54 * Minor changes - removed include of ctype.h.
56 * Revision 1.39 1996/05/31 09:07:05 quinn
57 * Work on character-set handling
59 * Revision 1.38 1996/05/14 11:34:01 adam
60 * Scan support in multiple registers/databases.
62 * Revision 1.37 1996/05/14 06:16:48 adam
63 * Compact use/set bytes used in search service.
65 * Revision 1.36 1996/05/01 13:46:37 adam
66 * First work on multiple records in one file.
67 * New option, -offset, to the "unread" command in the filter module.
69 * Revision 1.35 1996/03/26 16:01:14 adam
70 * New setting lockPath: directory of various lock files.
72 * Revision 1.34 1996/03/20 09:36:46 adam
73 * Function dict_lookup_grep got extra parameter, init_pos, which marks
74 * from which position in pattern approximate pattern matching should occur.
75 * Approximate pattern matching is used in relevance=re-2.
77 * Revision 1.33 1996/01/17 14:57:56 adam
78 * Prototype changed for reader functions in extract/retrieve. File
79 * is identified by 'void *' instead of 'int.
81 * Revision 1.32 1995/12/11 09:12:58 adam
82 * The rec_get function returns NULL if record doesn't exist - will
83 * happen in the server if the result set records have been deleted since
84 * the creation of the set (i.e. the search).
85 * The server saves a result temporarily if it is 'volatile', i.e. the
86 * set is register dependent.
88 * Revision 1.31 1995/12/08 16:22:56 adam
89 * Work on update while servers are running. Three lock files introduced.
90 * The servers reload their registers when necessary, but they don't
91 * reestablish result sets yet.
93 * Revision 1.30 1995/12/07 17:38:48 adam
94 * Work locking mechanisms for concurrent updates/commit.
96 * Revision 1.29 1995/12/04 14:22:32 adam
97 * Extra arg to recType_byName.
98 * Started work on new regular expression parsed input to
101 * Revision 1.28 1995/11/28 09:09:48 adam
102 * Zebra config renamed.
103 * Use setting 'recordId' to identify record now.
104 * Bug fix in recindex.c: rec_release_blocks was invokeded even
105 * though the blocks were already released.
106 * File traversal properly deletes records when needed.
108 * Revision 1.27 1995/11/27 13:58:54 adam
109 * New option -t. storeStore data implemented in server.
111 * Revision 1.26 1995/11/25 10:24:07 adam
112 * More record fields - they are enumerated now.
113 * New options: flagStoreData flagStoreKey.
115 * Revision 1.25 1995/11/21 15:29:13 adam
116 * Config file 'base' read by default by both indexer and server.
118 * Revision 1.24 1995/11/20 16:59:47 adam
119 * New update method: the 'old' keys are saved for each records.
121 * Revision 1.23 1995/11/16 17:00:56 adam
122 * Better logging of rpn query.
124 * Revision 1.22 1995/11/16 15:34:55 adam
125 * Uses new record management system in both indexer and server.
127 * Revision 1.21 1995/11/01 16:25:52 quinn
128 * *** empty log message ***
130 * Revision 1.20 1995/10/27 14:00:12 adam
131 * Implemented detection of database availability.
133 * Revision 1.19 1995/10/17 18:02:11 adam
134 * New feature: databases. Implemented as prefix to words in dictionary.
136 * Revision 1.18 1995/10/16 14:03:09 quinn
137 * Changes to support element set names and espec1
139 * Revision 1.17 1995/10/16 09:32:40 adam
140 * More work on relational op.
142 * Revision 1.16 1995/10/13 12:26:44 adam
143 * Optimization of truncation.
145 * Revision 1.15 1995/10/12 12:40:55 adam
146 * Bug fixes in rpn_prox.
148 * Revision 1.14 1995/10/09 16:18:37 adam
149 * Function dict_lookup_grep got extra client data parameter.
151 * Revision 1.13 1995/10/06 14:38:00 adam
152 * New result set method: r_score.
153 * Local no (sysno) and score is transferred to retrieveCtrl.
155 * Revision 1.12 1995/10/06 13:52:06 adam
156 * Bug fixes. Handler may abort further scanning.
158 * Revision 1.11 1995/10/06 10:43:57 adam
159 * Scan added. 'occurrences' in scan entries not set yet.
161 * Revision 1.10 1995/10/02 16:43:32 quinn
162 * Set default resulting record type in fetch.
164 * Revision 1.9 1995/10/02 15:18:52 adam
165 * New member in recRetrieveCtrl: diagnostic.
167 * Revision 1.8 1995/09/28 09:19:47 adam
168 * xfree/xmalloc used everywhere.
169 * Extract/retrieve method seems to work for text records.
171 * Revision 1.7 1995/09/27 16:17:32 adam
172 * More work on retrieve.
174 * Revision 1.6 1995/09/08 08:53:22 adam
175 * Record buffer maintained in server_info.
177 * Revision 1.5 1995/09/06 16:11:18 adam
178 * Option: only one word key per file.
180 * Revision 1.4 1995/09/06 10:33:04 adam
181 * More work on present. Some log messages removed.
183 * Revision 1.3 1995/09/05 15:28:40 adam
184 * More work on search engine.
186 * Revision 1.2 1995/09/04 12:33:43 adam
187 * Various cleanup. YAZ util used instead.
189 * Revision 1.1 1995/09/04 09:10:41 adam
190 * More work on index add/del/update.
191 * Merge sort implemented.
192 * Initial work on z39 server.
211 static int register_lock (ZServerInfo *zi)
214 int state = zebra_server_lock_get_state(zi, &lastChange);
224 zebra_server_lock (zi, state);
228 if (zi->registerState == state)
230 if (zi->registerChange >= lastChange)
232 logf (LOG_LOG, "Register completely updated since last access");
234 else if (zi->registerState == -1)
235 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
238 logf (LOG_LOG, "Register has changed state from %d to %d",
239 zi->registerState, state);
240 zi->registerChange = lastChange;
243 zebTargetInfo_close (zi->zti, 0);
244 dict_close (zi->dict);
248 isc_close (zi->isamc);
249 rec_close (&zi->records);
251 bf_cache (zi->bfs, state ? res_get (zi->res, "shadow") : NULL);
252 zi->registerState = state;
253 zi->records = rec_open (zi->bfs, 0);
254 if (!(zi->dict = dict_open (zi->bfs, FNAME_DICT, 40, 0)))
258 if (res_get_match (zi->res, "isam", "c", NULL))
260 if (!(zi->isamc = isc_open (zi->bfs, FNAME_ISAMC,
261 0, key_isamc_m(zi->res))))
267 if (!(zi->isam = is_open (zi->bfs, FNAME_ISAM, key_compare, 0,
268 sizeof (struct it_key), zi->res)))
271 zi->zti = zebTargetInfo_open (zi->records, 0);
276 static void register_unlock (ZServerInfo *zi)
278 static int waitSec = -1;
282 logf (LOG_LOG, "user/system: %ld/%ld",
283 (long) (zi->tms2.tms_utime - zi->tms1.tms_utime),
284 (long) (zi->tms2.tms_stime - zi->tms1.tms_stime));
288 char *s = res_get (zi->res, "debugRequestWait");
299 if (zi->registerState != -1)
300 zebra_server_unlock (zi, zi->registerState);
303 bend_initresult *bend_init (bend_initrequest *q)
305 bend_initresult *r = odr_malloc (q->stream, sizeof(*r));
306 ZServerInfo *zi = xmalloc (sizeof(*zi));
307 struct statserv_options_block *sob;
313 logf (LOG_DEBUG, "bend_init");
315 sob = statserv_getcontrol ();
316 logf (LOG_LOG, "Reading resources from %s", sob->configname);
317 if (!(zi->res = res_open (sob->configname)))
319 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
322 zebra_server_lock_init (zi);
323 zi->dh = data1_create ();
324 zi->bfs = bfs_create (res_get (zi->res, "register"));
325 bf_lockDir (zi->bfs, res_get (zi->res, "lockDir"));
326 data1_set_tabpath (zi->dh, res_get(zi->res, "profilePath"));
328 zi->registerState = -1; /* trigger open of registers! */
329 zi->registerChange = 0;
332 zi->odr = odr_createmem (ODR_ENCODE);
333 zi->registered_sets = NULL;
334 zi->zebra_maps = zebra_maps_open (res_get(zi->res, "profilePath"),
339 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
341 ZServerInfo *zi = handle;
342 bend_searchresult *r = odr_malloc (q->stream, sizeof(*r));
351 zi->errString = NULL;
353 logf (LOG_LOG, "ResultSet '%s'", q->setname);
354 switch (q->query->which)
356 case Z_Query_type_1: case Z_Query_type_101:
357 r->errcode = rpn_search (zi, q->query->u.type_1,
358 q->num_bases, q->basenames, q->setname,
360 r->errstring = zi->errString;
365 register_unlock (zi);
369 struct fetch_control {
372 char *record_int_buf;
377 static int record_ext_read (void *fh, char *buf, size_t count)
379 struct fetch_control *fc = fh;
380 return read (fc->fd, buf, count);
383 static off_t record_ext_seek (void *fh, off_t offset)
385 struct fetch_control *fc = fh;
386 return lseek (fc->fd, offset + fc->record_offset, SEEK_SET);
389 static off_t record_ext_tell (void *fh)
391 struct fetch_control *fc = fh;
392 return lseek (fc->fd, 0, SEEK_CUR) - fc->record_offset;
395 static off_t record_int_seek (void *fh, off_t offset)
397 struct fetch_control *fc = fh;
398 return (off_t) (fc->record_int_pos = offset);
401 static off_t record_int_tell (void *fh)
403 struct fetch_control *fc = fh;
404 return (off_t) fc->record_int_pos;
407 static int record_int_read (void *fh, char *buf, size_t count)
409 struct fetch_control *fc = fh;
410 int l = fc->record_int_len - fc->record_int_pos;
413 l = (l < count) ? l : count;
414 memcpy (buf, fc->record_int_buf + fc->record_int_pos, l);
415 fc->record_int_pos += l;
419 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
420 oid_value input_format, Z_RecordComposition *comp,
421 oid_value *output_format, char **rec_bufp,
422 int *rec_lenp, char **basenamep)
425 char *fname, *file_type, *basename;
427 struct recRetrieveCtrl retrieveCtrl;
429 struct fetch_control fc;
431 rec = rec_get (zi->records, sysno);
434 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
437 file_type = rec->info[recInfo_fileType];
438 fname = rec->info[recInfo_filename];
439 basename = rec->info[recInfo_databaseName];
440 *basenamep = odr_malloc (stream, strlen(basename)+1);
441 strcpy (*basenamep, basename);
443 if (!(rt = recType_byName (file_type, subType)))
445 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
449 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
450 retrieveCtrl.fh = &fc;
452 if (rec->size[recInfo_storeData] > 0)
454 retrieveCtrl.readf = record_int_read;
455 retrieveCtrl.seekf = record_int_seek;
456 retrieveCtrl.tellf = record_int_tell;
457 fc.record_int_len = rec->size[recInfo_storeData];
458 fc.record_int_buf = rec->info[recInfo_storeData];
459 fc.record_int_pos = 0;
460 logf (LOG_DEBUG, "Internal retrieve. %d bytes", fc.record_int_len);
464 if ((fc.fd = open (fname, O_BINARY|O_RDONLY)) == -1)
466 logf (LOG_WARN|LOG_ERRNO, "Retrieve fail; missing file: %s",
471 memcpy (&fc.record_offset, rec->info[recInfo_offset],
472 sizeof(fc.record_offset));
474 retrieveCtrl.readf = record_ext_read;
475 retrieveCtrl.seekf = record_ext_seek;
476 retrieveCtrl.tellf = record_ext_tell;
478 record_ext_seek (retrieveCtrl.fh, 0);
480 retrieveCtrl.subType = subType;
481 retrieveCtrl.localno = sysno;
482 retrieveCtrl.score = score;
483 retrieveCtrl.odr = stream;
484 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
485 retrieveCtrl.comp = comp;
486 retrieveCtrl.diagnostic = 0;
487 retrieveCtrl.dh = zi->dh;
488 (*rt->retrieve)(&retrieveCtrl);
489 *output_format = retrieveCtrl.output_format;
490 *rec_bufp = retrieveCtrl.rec_buf;
491 *rec_lenp = retrieveCtrl.rec_len;
496 return retrieveCtrl.diagnostic;
499 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
501 ZServerInfo *zi = handle;
502 bend_fetchresult *r = odr_malloc (q->stream, sizeof(*r));
504 ZServerSetSysno *records;
510 r->basename = "base";
515 positions[0] = q->number;
516 records = resultSetSysnoGet (zi, q->setname, 1, positions);
519 logf (LOG_DEBUG, "resultSetRecordGet, error");
521 register_unlock (zi);
524 if (!records[0].sysno)
527 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
528 register_unlock (zi);
531 r->errcode = record_fetch (zi, records[0].sysno,
532 records[0].score, q->stream, q->format,
533 q->comp, &r->format, &r->record, &r->len,
535 resultSetSysnoDel (zi, records, 1);
536 register_unlock (zi);
540 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
542 ZServerInfo *zi = handle;
544 register_unlock (zi);
548 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
550 ZServerInfo *zi = handle;
551 bend_scanresult *r = odr_malloc (q->stream, sizeof(*r));
559 r->term_position = q->term_position;
560 r->num_entries = q->num_entries;
561 r->errcode = rpn_scan (zi, q->term,
563 q->num_bases, q->basenames,
565 &r->num_entries, &r->entries, &status);
566 r->errstring = zi->errString;
568 register_unlock (zi);
572 void bend_close (void *handle)
574 ZServerInfo *zi = handle;
578 resultSetDestroy (zi);
579 zebTargetInfo_close (zi->zti, 0);
580 dict_close (zi->dict);
584 isc_close (zi->isamc);
585 rec_close (&zi->records);
586 register_unlock (zi);
588 odr_destroy (zi->odr);
589 zebra_maps_close (zi->zebra_maps);
590 bfs_destroy (zi->bfs);
591 data1_destroy (zi->dh);
592 zebra_server_lock_destroy (zi);
599 static void pre_init (struct statserv_options_block *sob)
601 char *pidfile = "zebrasrv.pid";
602 int fd = creat (pidfile, 0666);
605 logf (LOG_WARN|LOG_ERRNO, "creat %s", pidfile);
610 sprintf (pidstr, "%ld", (long) getpid ());
611 write (fd, pidstr, strlen(pidstr));
617 int main (int argc, char **argv)
619 struct statserv_options_block *sob;
621 sob = statserv_getcontrol ();
622 strcpy (sob->configname, FNAME_CONFIG);
624 sob->pre_init = pre_init;
626 statserv_setcontrol (sob);
628 return statserv_main (argc, argv);