2 * Copyright (C) 1995-1998, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.53 1998-01-12 15:04:09 adam
8 * The test option (-s) only uses read-lock (and not write lock).
10 * Revision 1.52 1997/11/18 10:05:08 adam
11 * Changed character map facility so that admin can specify character
12 * mapping files for each register type, w, p, etc.
14 * Revision 1.51 1997/10/27 14:33:06 adam
15 * Moved towards generic character mapping depending on "structure"
16 * field in abstract syntax file. Fixed a few memory leaks. Fixed
17 * bug with negative integers when doing searches with relational
20 * Revision 1.50 1997/09/29 09:08:36 adam
21 * Revised locking system to be thread safe for the server.
23 * Revision 1.49 1997/09/25 14:57:23 adam
26 * Revision 1.48 1997/09/17 12:19:19 adam
27 * Zebra version corresponds to YAZ version 1.4.
28 * Changed Zebra server so that it doesn't depend on global common_resource.
30 * Revision 1.47 1997/09/04 13:58:36 adam
31 * New retrieve/extract method tellf (added).
32 * Added O_BINARY for open calls.
34 * Revision 1.46 1997/07/28 08:30:47 adam
35 * Server returns diagnostic 14 when record doesn't exist.
37 * Revision 1.45 1996/12/23 15:30:45 adam
39 * Bug fix: result sets weren't deleted after server shut down.
41 * Revision 1.44 1996/12/11 12:08:01 adam
42 * Added better compression.
44 * Revision 1.43 1996/11/15 15:03:58 adam
45 * Logging of execution speed by using the times(2) call.
47 * Revision 1.42 1996/11/08 11:10:36 adam
48 * Buffers used during file match got bigger.
49 * Compressed ISAM support everywhere.
50 * Bug fixes regarding masking characters in queries.
51 * Redesigned Regexp-2 queries.
53 * Revision 1.41 1996/10/29 14:09:56 adam
54 * Use of cisam system - enabled if setting isamc is 1.
56 * Revision 1.40 1996/06/04 10:19:02 adam
57 * Minor changes - removed include of ctype.h.
59 * Revision 1.39 1996/05/31 09:07:05 quinn
60 * Work on character-set handling
62 * Revision 1.38 1996/05/14 11:34:01 adam
63 * Scan support in multiple registers/databases.
65 * Revision 1.37 1996/05/14 06:16:48 adam
66 * Compact use/set bytes used in search service.
68 * Revision 1.36 1996/05/01 13:46:37 adam
69 * First work on multiple records in one file.
70 * New option, -offset, to the "unread" command in the filter module.
72 * Revision 1.35 1996/03/26 16:01:14 adam
73 * New setting lockPath: directory of various lock files.
75 * Revision 1.34 1996/03/20 09:36:46 adam
76 * Function dict_lookup_grep got extra parameter, init_pos, which marks
77 * from which position in pattern approximate pattern matching should occur.
78 * Approximate pattern matching is used in relevance=re-2.
80 * Revision 1.33 1996/01/17 14:57:56 adam
81 * Prototype changed for reader functions in extract/retrieve. File
82 * is identified by 'void *' instead of 'int.
84 * Revision 1.32 1995/12/11 09:12:58 adam
85 * The rec_get function returns NULL if record doesn't exist - will
86 * happen in the server if the result set records have been deleted since
87 * the creation of the set (i.e. the search).
88 * The server saves a result temporarily if it is 'volatile', i.e. the
89 * set is register dependent.
91 * Revision 1.31 1995/12/08 16:22:56 adam
92 * Work on update while servers are running. Three lock files introduced.
93 * The servers reload their registers when necessary, but they don't
94 * reestablish result sets yet.
96 * Revision 1.30 1995/12/07 17:38:48 adam
97 * Work locking mechanisms for concurrent updates/commit.
99 * Revision 1.29 1995/12/04 14:22:32 adam
100 * Extra arg to recType_byName.
101 * Started work on new regular expression parsed input to
102 * structured records.
104 * Revision 1.28 1995/11/28 09:09:48 adam
105 * Zebra config renamed.
106 * Use setting 'recordId' to identify record now.
107 * Bug fix in recindex.c: rec_release_blocks was invokeded even
108 * though the blocks were already released.
109 * File traversal properly deletes records when needed.
111 * Revision 1.27 1995/11/27 13:58:54 adam
112 * New option -t. storeStore data implemented in server.
114 * Revision 1.26 1995/11/25 10:24:07 adam
115 * More record fields - they are enumerated now.
116 * New options: flagStoreData flagStoreKey.
118 * Revision 1.25 1995/11/21 15:29:13 adam
119 * Config file 'base' read by default by both indexer and server.
121 * Revision 1.24 1995/11/20 16:59:47 adam
122 * New update method: the 'old' keys are saved for each records.
124 * Revision 1.23 1995/11/16 17:00:56 adam
125 * Better logging of rpn query.
127 * Revision 1.22 1995/11/16 15:34:55 adam
128 * Uses new record management system in both indexer and server.
130 * Revision 1.21 1995/11/01 16:25:52 quinn
131 * *** empty log message ***
133 * Revision 1.20 1995/10/27 14:00:12 adam
134 * Implemented detection of database availability.
136 * Revision 1.19 1995/10/17 18:02:11 adam
137 * New feature: databases. Implemented as prefix to words in dictionary.
139 * Revision 1.18 1995/10/16 14:03:09 quinn
140 * Changes to support element set names and espec1
142 * Revision 1.17 1995/10/16 09:32:40 adam
143 * More work on relational op.
145 * Revision 1.16 1995/10/13 12:26:44 adam
146 * Optimization of truncation.
148 * Revision 1.15 1995/10/12 12:40:55 adam
149 * Bug fixes in rpn_prox.
151 * Revision 1.14 1995/10/09 16:18:37 adam
152 * Function dict_lookup_grep got extra client data parameter.
154 * Revision 1.13 1995/10/06 14:38:00 adam
155 * New result set method: r_score.
156 * Local no (sysno) and score is transferred to retrieveCtrl.
158 * Revision 1.12 1995/10/06 13:52:06 adam
159 * Bug fixes. Handler may abort further scanning.
161 * Revision 1.11 1995/10/06 10:43:57 adam
162 * Scan added. 'occurrences' in scan entries not set yet.
164 * Revision 1.10 1995/10/02 16:43:32 quinn
165 * Set default resulting record type in fetch.
167 * Revision 1.9 1995/10/02 15:18:52 adam
168 * New member in recRetrieveCtrl: diagnostic.
170 * Revision 1.8 1995/09/28 09:19:47 adam
171 * xfree/xmalloc used everywhere.
172 * Extract/retrieve method seems to work for text records.
174 * Revision 1.7 1995/09/27 16:17:32 adam
175 * More work on retrieve.
177 * Revision 1.6 1995/09/08 08:53:22 adam
178 * Record buffer maintained in server_info.
180 * Revision 1.5 1995/09/06 16:11:18 adam
181 * Option: only one word key per file.
183 * Revision 1.4 1995/09/06 10:33:04 adam
184 * More work on present. Some log messages removed.
186 * Revision 1.3 1995/09/05 15:28:40 adam
187 * More work on search engine.
189 * Revision 1.2 1995/09/04 12:33:43 adam
190 * Various cleanup. YAZ util used instead.
192 * Revision 1.1 1995/09/04 09:10:41 adam
193 * More work on index add/del/update.
194 * Merge sort implemented.
195 * Initial work on z39 server.
214 static int register_lock (ZServerInfo *zi)
217 int state = zebra_server_lock_get_state(zi, &lastChange);
227 zebra_server_lock (zi, state);
231 if (zi->registerState == state)
233 if (zi->registerChange >= lastChange)
235 logf (LOG_LOG, "Register completely updated since last access");
237 else if (zi->registerState == -1)
238 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
241 logf (LOG_LOG, "Register has changed state from %d to %d",
242 zi->registerState, state);
243 zi->registerChange = lastChange;
246 zebTargetInfo_close (zi->zti, 0);
247 dict_close (zi->dict);
251 isc_close (zi->isamc);
252 rec_close (&zi->records);
254 bf_cache (zi->bfs, state ? res_get (zi->res, "shadow") : NULL);
255 zi->registerState = state;
256 zi->records = rec_open (zi->bfs, 0);
257 if (!(zi->dict = dict_open (zi->bfs, FNAME_DICT, 40, 0)))
261 if (res_get_match (zi->res, "isam", "c", NULL))
263 if (!(zi->isamc = isc_open (zi->bfs, FNAME_ISAMC,
264 0, key_isamc_m(zi->res))))
270 if (!(zi->isam = is_open (zi->bfs, FNAME_ISAM, key_compare, 0,
271 sizeof (struct it_key), zi->res)))
274 zi->zti = zebTargetInfo_open (zi->records, 0);
279 static void register_unlock (ZServerInfo *zi)
281 static int waitSec = -1;
285 logf (LOG_LOG, "user/system: %ld/%ld",
286 (long) (zi->tms2.tms_utime - zi->tms1.tms_utime),
287 (long) (zi->tms2.tms_stime - zi->tms1.tms_stime));
291 char *s = res_get (zi->res, "debugRequestWait");
302 if (zi->registerState != -1)
303 zebra_server_unlock (zi, zi->registerState);
306 bend_initresult *bend_init (bend_initrequest *q)
308 bend_initresult *r = odr_malloc (q->stream, sizeof(*r));
309 ZServerInfo *zi = xmalloc (sizeof(*zi));
310 struct statserv_options_block *sob;
316 logf (LOG_DEBUG, "bend_init");
318 sob = statserv_getcontrol ();
319 logf (LOG_LOG, "Reading resources from %s", sob->configname);
320 if (!(zi->res = res_open (sob->configname)))
322 logf (LOG_FATAL, "Failed to read resources `%s'", sob->configname);
326 zebra_server_lock_init (zi);
327 zi->dh = data1_create ();
328 zi->bfs = bfs_create (res_get (zi->res, "register"));
329 bf_lockDir (zi->bfs, res_get (zi->res, "lockDir"));
330 data1_set_tabpath (zi->dh, res_get(zi->res, "profilePath"));
332 zi->registerState = -1; /* trigger open of registers! */
333 zi->registerChange = 0;
336 zi->odr = odr_createmem (ODR_ENCODE);
337 zi->registered_sets = NULL;
338 zi->zebra_maps = zebra_maps_open (res_get(zi->res, "profilePath"),
343 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
345 ZServerInfo *zi = handle;
346 bend_searchresult *r = odr_malloc (q->stream, sizeof(*r));
355 zi->errString = NULL;
357 logf (LOG_LOG, "ResultSet '%s'", q->setname);
358 switch (q->query->which)
360 case Z_Query_type_1: case Z_Query_type_101:
361 r->errcode = rpn_search (zi, q->query->u.type_1,
362 q->num_bases, q->basenames, q->setname,
364 r->errstring = zi->errString;
369 register_unlock (zi);
373 struct fetch_control {
376 char *record_int_buf;
381 static int record_ext_read (void *fh, char *buf, size_t count)
383 struct fetch_control *fc = fh;
384 return read (fc->fd, buf, count);
387 static off_t record_ext_seek (void *fh, off_t offset)
389 struct fetch_control *fc = fh;
390 return lseek (fc->fd, offset + fc->record_offset, SEEK_SET);
393 static off_t record_ext_tell (void *fh)
395 struct fetch_control *fc = fh;
396 return lseek (fc->fd, 0, SEEK_CUR) - fc->record_offset;
399 static off_t record_int_seek (void *fh, off_t offset)
401 struct fetch_control *fc = fh;
402 return (off_t) (fc->record_int_pos = offset);
405 static off_t record_int_tell (void *fh)
407 struct fetch_control *fc = fh;
408 return (off_t) fc->record_int_pos;
411 static int record_int_read (void *fh, char *buf, size_t count)
413 struct fetch_control *fc = fh;
414 int l = fc->record_int_len - fc->record_int_pos;
417 l = (l < count) ? l : count;
418 memcpy (buf, fc->record_int_buf + fc->record_int_pos, l);
419 fc->record_int_pos += l;
423 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
424 oid_value input_format, Z_RecordComposition *comp,
425 oid_value *output_format, char **rec_bufp,
426 int *rec_lenp, char **basenamep)
429 char *fname, *file_type, *basename;
431 struct recRetrieveCtrl retrieveCtrl;
433 struct fetch_control fc;
435 rec = rec_get (zi->records, sysno);
438 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
441 file_type = rec->info[recInfo_fileType];
442 fname = rec->info[recInfo_filename];
443 basename = rec->info[recInfo_databaseName];
444 *basenamep = odr_malloc (stream, strlen(basename)+1);
445 strcpy (*basenamep, basename);
447 if (!(rt = recType_byName (file_type, subType)))
449 logf (LOG_WARN, "Retrieve: Cannot handle type %s", file_type);
452 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
453 retrieveCtrl.fh = &fc;
455 if (rec->size[recInfo_storeData] > 0)
457 retrieveCtrl.readf = record_int_read;
458 retrieveCtrl.seekf = record_int_seek;
459 retrieveCtrl.tellf = record_int_tell;
460 fc.record_int_len = rec->size[recInfo_storeData];
461 fc.record_int_buf = rec->info[recInfo_storeData];
462 fc.record_int_pos = 0;
463 logf (LOG_DEBUG, "Internal retrieve. %d bytes", fc.record_int_len);
467 if ((fc.fd = open (fname, O_BINARY|O_RDONLY)) == -1)
469 logf (LOG_WARN|LOG_ERRNO, "Retrieve fail; missing file: %s",
474 memcpy (&fc.record_offset, rec->info[recInfo_offset],
475 sizeof(fc.record_offset));
477 retrieveCtrl.readf = record_ext_read;
478 retrieveCtrl.seekf = record_ext_seek;
479 retrieveCtrl.tellf = record_ext_tell;
481 record_ext_seek (retrieveCtrl.fh, 0);
483 retrieveCtrl.subType = subType;
484 retrieveCtrl.localno = sysno;
485 retrieveCtrl.score = score;
486 retrieveCtrl.odr = stream;
487 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
488 retrieveCtrl.comp = comp;
489 retrieveCtrl.diagnostic = 0;
490 retrieveCtrl.dh = zi->dh;
491 (*rt->retrieve)(&retrieveCtrl);
492 *output_format = retrieveCtrl.output_format;
493 *rec_bufp = retrieveCtrl.rec_buf;
494 *rec_lenp = retrieveCtrl.rec_len;
499 return retrieveCtrl.diagnostic;
502 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
504 ZServerInfo *zi = handle;
505 bend_fetchresult *r = odr_malloc (q->stream, sizeof(*r));
507 ZServerSetSysno *records;
513 r->basename = "base";
518 positions[0] = q->number;
519 records = resultSetSysnoGet (zi, q->setname, 1, positions);
522 logf (LOG_DEBUG, "resultSetRecordGet, error");
524 register_unlock (zi);
527 if (!records[0].sysno)
530 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
531 register_unlock (zi);
534 r->errcode = record_fetch (zi, records[0].sysno,
535 records[0].score, q->stream, q->format,
536 q->comp, &r->format, &r->record, &r->len,
538 resultSetSysnoDel (zi, records, 1);
539 register_unlock (zi);
543 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
545 ZServerInfo *zi = handle;
547 register_unlock (zi);
551 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
553 ZServerInfo *zi = handle;
554 bend_scanresult *r = odr_malloc (q->stream, sizeof(*r));
562 r->term_position = q->term_position;
563 r->num_entries = q->num_entries;
564 r->errcode = rpn_scan (zi, q->term,
566 q->num_bases, q->basenames,
568 &r->num_entries, &r->entries, &status);
569 r->errstring = zi->errString;
571 register_unlock (zi);
575 void bend_close (void *handle)
577 ZServerInfo *zi = handle;
581 resultSetDestroy (zi);
582 zebTargetInfo_close (zi->zti, 0);
583 dict_close (zi->dict);
587 isc_close (zi->isamc);
588 rec_close (&zi->records);
589 register_unlock (zi);
591 odr_destroy (zi->odr);
592 zebra_maps_close (zi->zebra_maps);
593 bfs_destroy (zi->bfs);
594 data1_destroy (zi->dh);
595 zebra_server_lock_destroy (zi);
602 static void pre_init (struct statserv_options_block *sob)
604 char *pidfile = "zebrasrv.pid";
605 int fd = creat (pidfile, 0666);
608 logf (LOG_WARN|LOG_ERRNO, "creat %s", pidfile);
613 sprintf (pidstr, "%ld", (long) getpid ());
614 write (fd, pidstr, strlen(pidstr));
620 int main (int argc, char **argv)
622 struct statserv_options_block *sob;
624 sob = statserv_getcontrol ();
625 strcpy (sob->configname, FNAME_CONFIG);
627 sob->pre_init = pre_init;
629 statserv_setcontrol (sob);
631 return statserv_main (argc, argv);