2 * Copyright (C) 1995-1997, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.51 1997-10-27 14:33:06 adam
8 * Moved towards generic character mapping depending on "structure"
9 * field in abstract syntax file. Fixed a few memory leaks. Fixed
10 * bug with negative integers when doing searches with relational
13 * Revision 1.50 1997/09/29 09:08:36 adam
14 * Revised locking system to be thread safe for the server.
16 * Revision 1.49 1997/09/25 14:57:23 adam
19 * Revision 1.48 1997/09/17 12:19:19 adam
20 * Zebra version corresponds to YAZ version 1.4.
21 * Changed Zebra server so that it doesn't depend on global common_resource.
23 * Revision 1.47 1997/09/04 13:58:36 adam
24 * New retrieve/extract method tellf (added).
25 * Added O_BINARY for open calls.
27 * Revision 1.46 1997/07/28 08:30:47 adam
28 * Server returns diagnostic 14 when record doesn't exist.
30 * Revision 1.45 1996/12/23 15:30:45 adam
32 * Bug fix: result sets weren't deleted after server shut down.
34 * Revision 1.44 1996/12/11 12:08:01 adam
35 * Added better compression.
37 * Revision 1.43 1996/11/15 15:03:58 adam
38 * Logging of execution speed by using the times(2) call.
40 * Revision 1.42 1996/11/08 11:10:36 adam
41 * Buffers used during file match got bigger.
42 * Compressed ISAM support everywhere.
43 * Bug fixes regarding masking characters in queries.
44 * Redesigned Regexp-2 queries.
46 * Revision 1.41 1996/10/29 14:09:56 adam
47 * Use of cisam system - enabled if setting isamc is 1.
49 * Revision 1.40 1996/06/04 10:19:02 adam
50 * Minor changes - removed include of ctype.h.
52 * Revision 1.39 1996/05/31 09:07:05 quinn
53 * Work on character-set handling
55 * Revision 1.38 1996/05/14 11:34:01 adam
56 * Scan support in multiple registers/databases.
58 * Revision 1.37 1996/05/14 06:16:48 adam
59 * Compact use/set bytes used in search service.
61 * Revision 1.36 1996/05/01 13:46:37 adam
62 * First work on multiple records in one file.
63 * New option, -offset, to the "unread" command in the filter module.
65 * Revision 1.35 1996/03/26 16:01:14 adam
66 * New setting lockPath: directory of various lock files.
68 * Revision 1.34 1996/03/20 09:36:46 adam
69 * Function dict_lookup_grep got extra parameter, init_pos, which marks
70 * from which position in pattern approximate pattern matching should occur.
71 * Approximate pattern matching is used in relevance=re-2.
73 * Revision 1.33 1996/01/17 14:57:56 adam
74 * Prototype changed for reader functions in extract/retrieve. File
75 * is identified by 'void *' instead of 'int.
77 * Revision 1.32 1995/12/11 09:12:58 adam
78 * The rec_get function returns NULL if record doesn't exist - will
79 * happen in the server if the result set records have been deleted since
80 * the creation of the set (i.e. the search).
81 * The server saves a result temporarily if it is 'volatile', i.e. the
82 * set is register dependent.
84 * Revision 1.31 1995/12/08 16:22:56 adam
85 * Work on update while servers are running. Three lock files introduced.
86 * The servers reload their registers when necessary, but they don't
87 * reestablish result sets yet.
89 * Revision 1.30 1995/12/07 17:38:48 adam
90 * Work locking mechanisms for concurrent updates/commit.
92 * Revision 1.29 1995/12/04 14:22:32 adam
93 * Extra arg to recType_byName.
94 * Started work on new regular expression parsed input to
97 * Revision 1.28 1995/11/28 09:09:48 adam
98 * Zebra config renamed.
99 * Use setting 'recordId' to identify record now.
100 * Bug fix in recindex.c: rec_release_blocks was invokeded even
101 * though the blocks were already released.
102 * File traversal properly deletes records when needed.
104 * Revision 1.27 1995/11/27 13:58:54 adam
105 * New option -t. storeStore data implemented in server.
107 * Revision 1.26 1995/11/25 10:24:07 adam
108 * More record fields - they are enumerated now.
109 * New options: flagStoreData flagStoreKey.
111 * Revision 1.25 1995/11/21 15:29:13 adam
112 * Config file 'base' read by default by both indexer and server.
114 * Revision 1.24 1995/11/20 16:59:47 adam
115 * New update method: the 'old' keys are saved for each records.
117 * Revision 1.23 1995/11/16 17:00:56 adam
118 * Better logging of rpn query.
120 * Revision 1.22 1995/11/16 15:34:55 adam
121 * Uses new record management system in both indexer and server.
123 * Revision 1.21 1995/11/01 16:25:52 quinn
124 * *** empty log message ***
126 * Revision 1.20 1995/10/27 14:00:12 adam
127 * Implemented detection of database availability.
129 * Revision 1.19 1995/10/17 18:02:11 adam
130 * New feature: databases. Implemented as prefix to words in dictionary.
132 * Revision 1.18 1995/10/16 14:03:09 quinn
133 * Changes to support element set names and espec1
135 * Revision 1.17 1995/10/16 09:32:40 adam
136 * More work on relational op.
138 * Revision 1.16 1995/10/13 12:26:44 adam
139 * Optimization of truncation.
141 * Revision 1.15 1995/10/12 12:40:55 adam
142 * Bug fixes in rpn_prox.
144 * Revision 1.14 1995/10/09 16:18:37 adam
145 * Function dict_lookup_grep got extra client data parameter.
147 * Revision 1.13 1995/10/06 14:38:00 adam
148 * New result set method: r_score.
149 * Local no (sysno) and score is transferred to retrieveCtrl.
151 * Revision 1.12 1995/10/06 13:52:06 adam
152 * Bug fixes. Handler may abort further scanning.
154 * Revision 1.11 1995/10/06 10:43:57 adam
155 * Scan added. 'occurrences' in scan entries not set yet.
157 * Revision 1.10 1995/10/02 16:43:32 quinn
158 * Set default resulting record type in fetch.
160 * Revision 1.9 1995/10/02 15:18:52 adam
161 * New member in recRetrieveCtrl: diagnostic.
163 * Revision 1.8 1995/09/28 09:19:47 adam
164 * xfree/xmalloc used everywhere.
165 * Extract/retrieve method seems to work for text records.
167 * Revision 1.7 1995/09/27 16:17:32 adam
168 * More work on retrieve.
170 * Revision 1.6 1995/09/08 08:53:22 adam
171 * Record buffer maintained in server_info.
173 * Revision 1.5 1995/09/06 16:11:18 adam
174 * Option: only one word key per file.
176 * Revision 1.4 1995/09/06 10:33:04 adam
177 * More work on present. Some log messages removed.
179 * Revision 1.3 1995/09/05 15:28:40 adam
180 * More work on search engine.
182 * Revision 1.2 1995/09/04 12:33:43 adam
183 * Various cleanup. YAZ util used instead.
185 * Revision 1.1 1995/09/04 09:10:41 adam
186 * More work on index add/del/update.
187 * Merge sort implemented.
188 * Initial work on z39 server.
207 static int register_lock (ZServerInfo *zi)
210 int state = zebra_server_lock_get_state(zi, &lastChange);
220 zebra_server_lock (zi, state);
224 if (zi->registerState == state)
226 if (zi->registerChange >= lastChange)
228 logf (LOG_LOG, "Register completely updated since last access");
230 else if (zi->registerState == -1)
231 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
234 logf (LOG_LOG, "Register has changed state from %d to %d",
235 zi->registerState, state);
236 zi->registerChange = lastChange;
239 zebTargetInfo_close (zi->zti, 0);
240 dict_close (zi->dict);
244 isc_close (zi->isamc);
245 rec_close (&zi->records);
247 bf_cache (zi->bfs, state ? res_get (zi->res, "shadow") : NULL);
248 zi->registerState = state;
249 zi->records = rec_open (zi->bfs, 0);
250 if (!(zi->dict = dict_open (zi->bfs, FNAME_DICT, 40, 0)))
254 if (res_get_match (zi->res, "isam", "c", NULL))
256 if (!(zi->isamc = isc_open (zi->bfs, FNAME_ISAMC,
257 0, key_isamc_m(zi->res))))
263 if (!(zi->isam = is_open (zi->bfs, FNAME_ISAM, key_compare, 0,
264 sizeof (struct it_key), zi->res)))
267 zi->zti = zebTargetInfo_open (zi->records, 0);
272 static void register_unlock (ZServerInfo *zi)
274 static int waitSec = -1;
278 logf (LOG_LOG, "user/system: %ld/%ld",
279 (long) (zi->tms2.tms_utime - zi->tms1.tms_utime),
280 (long) (zi->tms2.tms_stime - zi->tms1.tms_stime));
284 char *s = res_get (zi->res, "debugRequestWait");
295 if (zi->registerState != -1)
296 zebra_server_unlock (zi, zi->registerState);
299 bend_initresult *bend_init (bend_initrequest *q)
301 bend_initresult *r = odr_malloc (q->stream, sizeof(*r));
302 ZServerInfo *zi = xmalloc (sizeof(*zi));
303 struct statserv_options_block *sob;
309 logf (LOG_DEBUG, "bend_init");
311 sob = statserv_getcontrol ();
312 logf (LOG_LOG, "Reading resources from %s", sob->configname);
313 if (!(zi->res = res_open (sob->configname)))
315 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
318 zebra_server_lock_init (zi);
319 zi->dh = data1_create ();
320 zi->bfs = bfs_create (res_get (zi->res, "register"));
321 bf_lockDir (zi->bfs, res_get (zi->res, "lockDir"));
322 data1_set_tabpath (zi->dh, res_get(zi->res, "profilePath"));
324 zi->registerState = -1; /* trigger open of registers! */
325 zi->registerChange = 0;
328 zi->odr = odr_createmem (ODR_ENCODE);
329 zi->registered_sets = NULL;
330 zi->zebra_maps = zebra_maps_open (res_get(zi->res, "profilePath"));
334 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
336 ZServerInfo *zi = handle;
337 bend_searchresult *r = odr_malloc (q->stream, sizeof(*r));
346 zi->errString = NULL;
348 logf (LOG_LOG, "ResultSet '%s'", q->setname);
349 switch (q->query->which)
351 case Z_Query_type_1: case Z_Query_type_101:
352 r->errcode = rpn_search (zi, q->query->u.type_1,
353 q->num_bases, q->basenames, q->setname,
355 r->errstring = zi->errString;
360 register_unlock (zi);
364 struct fetch_control {
367 char *record_int_buf;
372 static int record_ext_read (void *fh, char *buf, size_t count)
374 struct fetch_control *fc = fh;
375 return read (fc->fd, buf, count);
378 static off_t record_ext_seek (void *fh, off_t offset)
380 struct fetch_control *fc = fh;
381 return lseek (fc->fd, offset + fc->record_offset, SEEK_SET);
384 static off_t record_ext_tell (void *fh)
386 struct fetch_control *fc = fh;
387 return lseek (fc->fd, 0, SEEK_CUR) - fc->record_offset;
390 static off_t record_int_seek (void *fh, off_t offset)
392 struct fetch_control *fc = fh;
393 return (off_t) (fc->record_int_pos = offset);
396 static off_t record_int_tell (void *fh)
398 struct fetch_control *fc = fh;
399 return (off_t) fc->record_int_pos;
402 static int record_int_read (void *fh, char *buf, size_t count)
404 struct fetch_control *fc = fh;
405 int l = fc->record_int_len - fc->record_int_pos;
408 l = (l < count) ? l : count;
409 memcpy (buf, fc->record_int_buf + fc->record_int_pos, l);
410 fc->record_int_pos += l;
414 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
415 oid_value input_format, Z_RecordComposition *comp,
416 oid_value *output_format, char **rec_bufp,
417 int *rec_lenp, char **basenamep)
420 char *fname, *file_type, *basename;
422 struct recRetrieveCtrl retrieveCtrl;
424 struct fetch_control fc;
426 rec = rec_get (zi->records, sysno);
429 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
432 file_type = rec->info[recInfo_fileType];
433 fname = rec->info[recInfo_filename];
434 basename = rec->info[recInfo_databaseName];
435 *basenamep = odr_malloc (stream, strlen(basename)+1);
436 strcpy (*basenamep, basename);
438 if (!(rt = recType_byName (file_type, subType)))
440 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
444 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
445 retrieveCtrl.fh = &fc;
447 if (rec->size[recInfo_storeData] > 0)
449 retrieveCtrl.readf = record_int_read;
450 retrieveCtrl.seekf = record_int_seek;
451 retrieveCtrl.tellf = record_int_tell;
452 fc.record_int_len = rec->size[recInfo_storeData];
453 fc.record_int_buf = rec->info[recInfo_storeData];
454 fc.record_int_pos = 0;
455 logf (LOG_DEBUG, "Internal retrieve. %d bytes", fc.record_int_len);
459 if ((fc.fd = open (fname, O_BINARY|O_RDONLY)) == -1)
461 logf (LOG_WARN|LOG_ERRNO, "Retrieve fail; missing file: %s",
466 memcpy (&fc.record_offset, rec->info[recInfo_offset],
467 sizeof(fc.record_offset));
469 retrieveCtrl.readf = record_ext_read;
470 retrieveCtrl.seekf = record_ext_seek;
471 retrieveCtrl.tellf = record_ext_tell;
473 record_ext_seek (retrieveCtrl.fh, 0);
475 retrieveCtrl.subType = subType;
476 retrieveCtrl.localno = sysno;
477 retrieveCtrl.score = score;
478 retrieveCtrl.odr = stream;
479 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
480 retrieveCtrl.comp = comp;
481 retrieveCtrl.diagnostic = 0;
482 retrieveCtrl.dh = zi->dh;
483 (*rt->retrieve)(&retrieveCtrl);
484 *output_format = retrieveCtrl.output_format;
485 *rec_bufp = retrieveCtrl.rec_buf;
486 *rec_lenp = retrieveCtrl.rec_len;
491 return retrieveCtrl.diagnostic;
494 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
496 ZServerInfo *zi = handle;
497 bend_fetchresult *r = odr_malloc (q->stream, sizeof(*r));
499 ZServerSetSysno *records;
505 r->basename = "base";
510 positions[0] = q->number;
511 records = resultSetSysnoGet (zi, q->setname, 1, positions);
514 logf (LOG_DEBUG, "resultSetRecordGet, error");
516 register_unlock (zi);
519 if (!records[0].sysno)
522 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
523 register_unlock (zi);
526 r->errcode = record_fetch (zi, records[0].sysno,
527 records[0].score, q->stream, q->format,
528 q->comp, &r->format, &r->record, &r->len,
530 resultSetSysnoDel (zi, records, 1);
531 register_unlock (zi);
535 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
537 ZServerInfo *zi = handle;
539 register_unlock (zi);
543 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
545 ZServerInfo *zi = handle;
546 bend_scanresult *r = odr_malloc (q->stream, sizeof(*r));
554 r->term_position = q->term_position;
555 r->num_entries = q->num_entries;
556 r->errcode = rpn_scan (zi, q->term,
558 q->num_bases, q->basenames,
560 &r->num_entries, &r->entries, &status);
561 r->errstring = zi->errString;
563 register_unlock (zi);
567 void bend_close (void *handle)
569 ZServerInfo *zi = handle;
573 resultSetDestroy (zi);
574 zebTargetInfo_close (zi->zti, 0);
575 dict_close (zi->dict);
579 isc_close (zi->isamc);
580 rec_close (&zi->records);
581 register_unlock (zi);
583 odr_destroy (zi->odr);
584 zebra_maps_close (zi->zebra_maps);
585 bfs_destroy (zi->bfs);
586 data1_destroy (zi->dh);
587 zebra_server_lock_destroy (zi);
594 static void pre_init (struct statserv_options_block *sob)
596 char *pidfile = "zebrasrv.pid";
597 int fd = creat (pidfile, 0666);
600 logf (LOG_WARN|LOG_ERRNO, "creat %s", pidfile);
605 sprintf (pidstr, "%ld", (long) getpid ());
606 write (fd, pidstr, strlen(pidstr));
612 int main (int argc, char **argv)
614 struct statserv_options_block *sob;
616 sob = statserv_getcontrol ();
617 strcpy (sob->configname, FNAME_CONFIG);
619 sob->pre_init = pre_init;
621 statserv_setcontrol (sob);
623 return statserv_main (argc, argv);