/[LeafOK_CVS]/lbbs/src/section_list_loader.c
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Contents of /lbbs/src/section_list_loader.c

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Revision 1.41 - (show annotations)
Tue Sep 30 13:27:28 2025 UTC (5 months, 2 weeks ago) by sysadm
Branch: MAIN
Changes since 1.40: +14 -0 lines
Content type: text/x-csrc
Rewrite title with "Re: Re: " prefix into "Re: ... "

1 /***************************************************************************
2 section_list_loader.c - description
3 -------------------
4 Copyright : (C) 2004-2025 by Leaflet
5 Email : leaflet@leafok.com
6 ***************************************************************************/
7
8 /***************************************************************************
9 * *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License as published by *
12 * the Free Software Foundation; either version 3 of the License, or *
13 * (at your option) any later version. *
14 * *
15 ***************************************************************************/
16
17 #include "article_cache.h"
18 #include "bbs.h"
19 #include "database.h"
20 #include "ip_mask.h"
21 #include "log.h"
22 #include "menu.h"
23 #include "section_list_loader.h"
24 #include <errno.h>
25 #include <signal.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30
31 int section_list_loader_pid;
32 int last_article_op_log_mid;
33
34 int load_section_config_from_db(int update_gen_ex)
35 {
36 MYSQL *db = NULL;
37 MYSQL_RES *rs = NULL, *rs2 = NULL;
38 MYSQL_ROW row, row2;
39 char sql[SQL_BUFFER_LEN];
40 int32_t sid;
41 char master_list[(BBS_username_max_len + 1) * 3 + 1];
42 SECTION_LIST *p_section;
43 char ex_menu_conf[FILE_PATH_LEN];
44 MENU_SET ex_menu_set_new;
45 int ret = 0;
46
47 db = db_open();
48 if (db == NULL)
49 {
50 log_error("db_open() error: %s\n", mysql_error(db));
51 ret = -1;
52 goto cleanup;
53 }
54
55 snprintf(sql, sizeof(sql),
56 "SELECT section_config.SID, sname, section_config.title, section_config.CID, "
57 "read_user_level, write_user_level, section_config.enable * section_class.enable AS enable, "
58 "UNIX_TIMESTAMP(ex_menu_tm) AS ex_menu_tm "
59 "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
60 "ORDER BY section_config.SID");
61
62 if (mysql_query(db, sql) != 0)
63 {
64 log_error("Query section_list error: %s\n", mysql_error(db));
65 ret = -2;
66 goto cleanup;
67 }
68 if ((rs = mysql_store_result(db)) == NULL)
69 {
70 log_error("Get section_list data failed\n");
71 ret = -2;
72 goto cleanup;
73 }
74
75 ret = 0;
76 while ((row = mysql_fetch_row(rs)))
77 {
78 sid = atoi(row[0]);
79
80 // Query section master
81 snprintf(sql, sizeof(sql),
82 "SELECT username FROM section_master "
83 "INNER JOIN user_list ON section_master.UID = user_list.UID "
84 "WHERE SID = %d AND section_master.enable AND (NOW() BETWEEN begin_dt AND end_dt) "
85 "ORDER BY major DESC, begin_dt ASC LIMIT 3",
86 sid);
87
88 if (mysql_query(db, sql) != 0)
89 {
90 log_error("Query section_master error: %s\n", mysql_error(db));
91 ret = -3;
92 break;
93 }
94 if ((rs2 = mysql_store_result(db)) == NULL)
95 {
96 log_error("Get section_master data failed\n");
97 ret = -3;
98 break;
99 }
100
101 master_list[0] = '\0';
102 while ((row2 = mysql_fetch_row(rs2)))
103 {
104 strncat(master_list, row2[0], sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
105 strncat(master_list, " ", sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
106 }
107 mysql_free_result(rs2);
108 rs2 = NULL;
109
110 p_section = section_list_find_by_sid(sid);
111
112 if (p_section == NULL)
113 {
114 p_section = section_list_create(sid, row[1], row[2], master_list);
115 if (p_section == NULL)
116 {
117 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
118 ret = -4;
119 break;
120 }
121
122 // acquire rw lock
123 ret = section_list_rw_lock(p_section);
124 if (ret < 0)
125 {
126 break;
127 }
128 }
129 else
130 {
131 // acquire rw lock
132 ret = section_list_rw_lock(p_section);
133 if (ret < 0)
134 {
135 break;
136 }
137
138 strncpy(p_section->sname, row[1], sizeof(p_section->sname) - 1);
139 p_section->sname[sizeof(p_section->sname) - 1] = '\0';
140 strncpy(p_section->stitle, row[2], sizeof(p_section->stitle) - 1);
141 p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
142 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
143 p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
144 }
145
146 p_section->class_id = atoi(row[3]);
147 p_section->read_user_level = atoi(row[4]);
148 p_section->write_user_level = atoi(row[5]);
149 p_section->enable = (int8_t)atoi(row[6]);
150
151 // Update gen_ex menu set
152 if (update_gen_ex && p_section->enable && atoi(row[7]) > p_section->ex_menu_tm)
153 {
154 snprintf(ex_menu_conf, sizeof(ex_menu_conf), "%s/%d", VAR_GEN_EX_MENU_DIR, p_section->sid);
155
156 ret = load_menu(&ex_menu_set_new, ex_menu_conf);
157 if (ret < 0)
158 {
159 unload_menu(&ex_menu_set_new);
160 log_error("load_menu(%s) error: %d\n", ex_menu_conf, ret);
161 }
162 else
163 {
164 if (p_section->ex_menu_tm > 0)
165 {
166 unload_menu(&(p_section->ex_menu_set));
167 }
168
169 ex_menu_set_new.allow_exit = 1; // Allow exit menu
170 memcpy(&(p_section->ex_menu_set), &ex_menu_set_new, sizeof(ex_menu_set_new));
171
172 p_section->ex_menu_tm = atol(row[7]);
173 #ifdef _DEBUG
174 log_common("Loaded gen_ex_menu of section %d [%s]\n", p_section->sid, p_section->sname);
175 #endif
176 }
177 }
178
179 // release rw lock
180 ret = section_list_rw_unlock(p_section);
181 if (ret < 0)
182 {
183 break;
184 }
185 }
186
187 cleanup:
188 mysql_free_result(rs2);
189 mysql_free_result(rs);
190 mysql_close(db);
191
192 return ret;
193 }
194
195 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
196 {
197 MYSQL *db = NULL;
198 MYSQL_RES *rs = NULL;
199 MYSQL_ROW row;
200 char sql[SQL_BUFFER_LEN];
201 ARTICLE article;
202 ARTICLE *p_topic;
203 SECTION_LIST *p_section = NULL;
204 int32_t last_sid = 0;
205 char sub_ip[IP_ADDR_LEN];
206 int article_count = 0;
207 int ret = 0;
208 int i;
209 size_t j;
210
211 db = db_open();
212 if (db == NULL)
213 {
214 log_error("db_open() error: %s\n", mysql_error(db));
215 ret = -1;
216 goto cleanup;
217 }
218
219 snprintf(sql, sizeof(sql),
220 "SELECT bbs.AID, TID, SID, bbs.CID, UID, visible, excerption, ontop, `lock`, "
221 "transship, username, nickname, title, UNIX_TIMESTAMP(sub_dt) AS sub_dt, "
222 "sub_ip, bbs_content.content "
223 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
224 "WHERE bbs.AID >= %d ORDER BY bbs.AID LIMIT %d",
225 start_aid, article_count_limit);
226
227 if (mysql_query(db, sql) != 0)
228 {
229 log_error("Query article list error: %s\n", mysql_error(db));
230 ret = -2;
231 goto cleanup;
232 }
233 if ((rs = mysql_use_result(db)) == NULL)
234 {
235 log_error("Get article list data failed\n");
236 ret = -2;
237 goto cleanup;
238 }
239
240 // acquire global lock
241 if (global_lock && (ret = section_list_rw_lock(NULL)) < 0)
242 {
243 log_error("section_list_rw_lock(sid = 0) error\n");
244 goto cleanup;
245 }
246
247 while ((row = mysql_fetch_row(rs)))
248 {
249 memset(&article, 0, sizeof(ARTICLE));
250
251 // copy data of article
252 i = 0;
253
254 article.aid = atoi(row[i++]);
255 article.tid = atoi(row[i++]);
256 article.sid = atoi(row[i++]);
257 article.cid = atoi(row[i++]);
258 article.uid = atoi(row[i++]);
259 article.visible = (int8_t)atoi(row[i++]);
260 article.excerption = (int8_t)atoi(row[i++]);
261 article.ontop = (int8_t)atoi(row[i++]);
262 article.lock = (int8_t)atoi(row[i++]);
263 article.transship = (int8_t)atoi(row[i++]);
264
265 strncpy(article.username, row[i++], sizeof(article.username) - 1);
266 article.username[sizeof(article.username) - 1] = '\0';
267 strncpy(article.nickname, row[i++], sizeof(article.nickname) - 1);
268 article.nickname[sizeof(article.nickname) - 1] = '\0';
269 strncpy(article.title, row[i++], sizeof(article.title) - 1);
270 article.title[sizeof(article.title) - 1] = '\0';
271
272 // Rewrite title with "Re: Re: " prefix into "Re: ... "
273 if (article.tid != 0)
274 {
275 for (j = 0; strncmp(article.title + j, "Re: ", strlen("Re: ")) == 0; j += strlen("Re: "))
276 ;
277 if (j >= strlen("Re: Re: "))
278 {
279 memcpy(article.title, "Re: ... ", strlen("Re: ... "));
280 memmove(article.title + strlen("Re: ... "), article.title + j, sizeof(article.title) - 1 - j);
281 article.title[sizeof(article.title) - 1 - j] = '\0';
282 }
283 }
284
285 article.sub_dt = atol(row[i++]);
286
287 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
288 sub_ip[sizeof(sub_ip) - 1] = '\0';
289 ip_mask(sub_ip, 1, '*');
290
291 // release lock of last section if different from current one
292 if (!global_lock && article.sid != last_sid && last_sid != 0)
293 {
294 if ((ret = section_list_rw_unlock(p_section)) < 0)
295 {
296 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
297 break;
298 }
299 }
300
301 if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
302 {
303 log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
304 ret = ERR_UNKNOWN_SECTION; // Unknown section found
305 break;
306 }
307
308 if (article.visible != 0 && article.tid != 0)
309 {
310 // Check if topic article is visible
311 p_topic = article_block_find_by_aid(article.tid);
312 if (p_topic == NULL || p_topic->visible == 0)
313 {
314 // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
315 article.tid = 0;
316 article.visible = 0;
317 }
318 }
319
320 // acquire lock of current section if different from last one
321 if (!global_lock && article.sid != last_sid)
322 {
323 if ((ret = section_list_rw_lock(p_section)) < 0)
324 {
325 log_error("section_list_rw_lock(sid=0) error\n");
326 break;
327 }
328 }
329
330 // append article to section list
331 last_sid = article.sid;
332
333 if (section_list_append_article(p_section, &article) < 0)
334 {
335 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
336 p_section->sid, article.aid);
337 ret = -3;
338 break;
339 }
340
341 article_count++;
342
343 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
344 {
345 log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
346 ret = -4;
347 break;
348 }
349 }
350
351 // release lock of last section
352 if (!global_lock && last_sid != 0)
353 {
354 if ((ret = section_list_rw_unlock(p_section)) < 0)
355 {
356 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
357 }
358 }
359
360 // release global lock
361 if (global_lock && (ret = section_list_rw_unlock(NULL)) < 0)
362 {
363 log_error("section_list_rw_unlock(sid=0) error\n");
364 }
365
366 cleanup:
367 mysql_free_result(rs);
368 mysql_close(db);
369
370 article_cache_cleanup();
371
372 return (ret < 0 ? ret : article_count);
373 }
374
375 int set_last_article_op_log_from_db(void)
376 {
377 MYSQL *db = NULL;
378 MYSQL_RES *rs = NULL;
379 MYSQL_ROW row;
380 char sql[SQL_BUFFER_LEN];
381 int ret = 0;
382
383 db = db_open();
384 if (db == NULL)
385 {
386 log_error("db_open() error: %s\n", mysql_error(db));
387 ret = -1;
388 goto cleanup;
389 }
390
391 snprintf(sql, sizeof(sql),
392 "SELECT MID FROM bbs_article_op ORDER BY MID DESC LIMIT 1");
393
394 if (mysql_query(db, sql) != 0)
395 {
396 log_error("Query article op error: %s\n", mysql_error(db));
397 ret = -2;
398 goto cleanup;
399 }
400 if ((rs = mysql_store_result(db)) == NULL)
401 {
402 log_error("Get article op data failed\n");
403 ret = -2;
404 goto cleanup;
405 }
406
407 if ((row = mysql_fetch_row(rs)))
408 {
409 last_article_op_log_mid = atoi(row[0]);
410 }
411
412 cleanup:
413 mysql_free_result(rs);
414 mysql_close(db);
415
416 return (ret < 0 ? ret : last_article_op_log_mid);
417 }
418
419 int apply_article_op_log_from_db(int op_count_limit)
420 {
421 MYSQL *db = NULL;
422 MYSQL_RES *rs = NULL, *rs2 = NULL;
423 MYSQL_ROW row, row2;
424 char sql[SQL_BUFFER_LEN];
425 ARTICLE *p_article;
426 SECTION_LIST *p_section = NULL;
427 SECTION_LIST *p_section_dest;
428 char sub_ip[IP_ADDR_LEN];
429 int32_t last_sid = 0;
430 int32_t sid_dest;
431 int op_count = 0;
432 int ret = 0;
433
434 db = db_open();
435 if (db == NULL)
436 {
437 log_error("db_open() error: %s\n", mysql_error(db));
438 ret = -1;
439 goto cleanup;
440 }
441
442 snprintf(sql, sizeof(sql),
443 "SELECT MID, AID, type FROM bbs_article_op "
444 "WHERE MID > %d AND type NOT IN ('A') "
445 "ORDER BY MID LIMIT %d",
446 last_article_op_log_mid, op_count_limit);
447
448 if (mysql_query(db, sql) != 0)
449 {
450 log_error("Query article log error: %s\n", mysql_error(db));
451 ret = -2;
452 goto cleanup;
453 }
454 if ((rs = mysql_store_result(db)) == NULL)
455 {
456 log_error("Get article log data failed\n");
457 ret = -2;
458 goto cleanup;
459 }
460
461 while ((row = mysql_fetch_row(rs)))
462 {
463 p_article = article_block_find_by_aid(atoi(row[1]));
464 if (p_article == NULL) // related article has not been appended yet
465 {
466 ret = -2;
467 break;
468 }
469
470 // release lock of last section if different from current one
471 if (p_article->sid != last_sid && last_sid != 0)
472 {
473 if ((ret = section_list_rw_unlock(p_section)) < 0)
474 {
475 log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
476 break;
477 }
478 }
479
480 if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
481 {
482 log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
483 ret = ERR_UNKNOWN_SECTION; // Unknown section found
484 break;
485 }
486
487 // acquire lock of current section if different from last one
488 if (p_article->sid != last_sid)
489 {
490 if ((ret = section_list_rw_lock(p_section)) < 0)
491 {
492 log_error("section_list_rw_lock(sid = 0) error\n");
493 break;
494 }
495 }
496
497 last_sid = p_article->sid;
498
499 switch (row[2][0])
500 {
501 case 'A': // Add article
502 log_error("Operation type=A should not be found\n");
503 break;
504 case 'D': // Delete article
505 case 'X': // Delete article by Admin
506 if (section_list_set_article_visible(p_section, atoi(row[1]), 0) < 0)
507 {
508 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=0) error\n", p_section->sid, atoi(row[1]));
509 }
510 if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
511 {
512 log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
513 }
514 break;
515 case 'S': // Restore article
516 if (section_list_set_article_visible(p_section, atoi(row[1]), 1) < 0)
517 {
518 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=1) error\n", p_section->sid, atoi(row[1]));
519 }
520 if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
521 {
522 log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
523 }
524 break;
525 case 'L': // Lock article
526 p_article->lock = 1;
527 break;
528 case 'U': // Unlock article
529 p_article->lock = 0;
530 break;
531 case 'M': // Modify article
532 snprintf(sql, sizeof(sql),
533 "SELECT bbs.CID, sub_ip, bbs_content.content "
534 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
535 "WHERE bbs.AID = %d",
536 p_article->aid);
537
538 if (mysql_query(db, sql) != 0)
539 {
540 log_error("Query article error: %s\n", mysql_error(db));
541 ret = -3;
542 break;
543 }
544 if ((rs2 = mysql_use_result(db)) == NULL)
545 {
546 log_error("Get article data failed\n");
547 ret = -3;
548 break;
549 }
550 if ((row2 = mysql_fetch_row(rs2)))
551 {
552 p_article->cid = atoi(row2[0]);
553
554 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
555 sub_ip[sizeof(sub_ip) - 1] = '\0';
556 ip_mask(sub_ip, 1, '*');
557
558 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
559 {
560 log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
561 ret = -4;
562 }
563 }
564 else
565 {
566 p_article->cid = 0;
567 ret = -4;
568 }
569 mysql_free_result(rs2);
570 rs2 = NULL;
571
572 p_article->excerption = 0; // Set excerption = 0 implicitly in case of rare condition
573 break;
574 case 'T': // Move article
575 snprintf(sql, sizeof(sql),
576 "SELECT SID FROM bbs WHERE AID = %d",
577 p_article->aid);
578
579 if (mysql_query(db, sql) != 0)
580 {
581 log_error("Query article error: %s\n", mysql_error(db));
582 ret = -3;
583 break;
584 }
585 if ((rs2 = mysql_store_result(db)) == NULL)
586 {
587 log_error("Get article data failed\n");
588 ret = -3;
589 break;
590 }
591 if ((row2 = mysql_fetch_row(rs2)))
592 {
593 sid_dest = atoi(row2[0]);
594 }
595 else
596 {
597 sid_dest = 0;
598 ret = -4;
599 }
600 mysql_free_result(rs2);
601 rs2 = NULL;
602
603 if (sid_dest > 0 && sid_dest != p_article->sid)
604 {
605 p_section_dest = section_list_find_by_sid(sid_dest);
606 if (p_section_dest == NULL)
607 {
608 ret = ERR_UNKNOWN_SECTION;
609 break;
610 }
611 // acquire lock of dest section
612 if ((ret = section_list_rw_lock(p_section_dest)) < 0)
613 {
614 log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
615 break;
616 }
617 // Move topic
618 if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
619 {
620 log_error("section_list_move_topic(src_sid=%d, dest_sid=%d, aid=%d) error (%d), retry in the next loop\n",
621 p_section->sid, p_section_dest->sid, p_article->aid, ret);
622 }
623 // release lock of dest section
624 if (section_list_rw_unlock(p_section_dest) < 0)
625 {
626 log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
627 ret = -1;
628 }
629 }
630 break;
631 case 'E': // Set article as excerption
632 p_article->excerption = 1;
633 break;
634 case 'O': // Unset article as excerption
635 p_article->excerption = 0;
636 break;
637 case 'F': // Set article on top
638 case 'V': // Unset article on top
639 p_article->ontop = (row[2][0] == 'F' ? 1 : 0);
640 if (section_list_update_article_ontop(p_section, p_article) < 0)
641 {
642 log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n",
643 p_section->sid, p_article->aid);
644 }
645 break;
646 case 'Z': // Set article as trnasship
647 p_article->transship = 1;
648 break;
649 default:
650 // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
651 break;
652 }
653
654 if (ret < 0)
655 {
656 break;
657 }
658
659 // Update MID with last successfully proceeded article_op_log
660 last_article_op_log_mid = atoi(row[0]);
661
662 op_count++;
663 }
664
665 // release lock of last section
666 if (last_sid != 0)
667 {
668 if ((ret = section_list_rw_unlock(p_section)) < 0)
669 {
670 log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
671 }
672 }
673
674 cleanup:
675 mysql_free_result(rs2);
676 mysql_free_result(rs);
677 mysql_close(db);
678
679 return (ret < 0 ? ret : op_count);
680 }
681
682 static void section_list_ex_menu_set_cleanup(void)
683 {
684 int i;
685
686 for (i = 0; i < p_section_list_pool->section_count; i++)
687 {
688 if (p_section_list_pool->sections[i].ex_menu_tm > 0)
689 {
690 unload_menu(&(p_section_list_pool->sections[i].ex_menu_set));
691 }
692 }
693 }
694
695 int section_list_loader_launch(void)
696 {
697 struct sigaction act = {0};
698 int pid;
699 int ret;
700 int32_t last_aid;
701 int article_count;
702 int load_count;
703 int last_mid;
704 int i;
705
706 if (section_list_loader_pid != 0)
707 {
708 log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
709 return -2;
710 }
711
712 pid = fork();
713
714 if (pid > 0) // Parent process
715 {
716 SYS_child_process_count++;
717 section_list_loader_pid = pid;
718 log_common("Section list loader process (pid = %d) start\n", pid);
719 return 0;
720 }
721 else if (pid < 0) // Error
722 {
723 log_error("fork() error (%d)\n", errno);
724 return -1;
725 }
726
727 // Child process
728 SYS_child_process_count = 0;
729
730 // Detach menu in shared memory
731 detach_menu_shm(&bbs_menu);
732
733 // Set signal handler
734 act.sa_handler = SIG_DFL;
735 if (sigaction(SIGHUP, &act, NULL) == -1)
736 {
737 log_error("set signal action of SIGHUP error: %d\n", errno);
738 }
739 act.sa_handler = SIG_DFL;
740 if (sigaction(SIGCHLD, &act, NULL) == -1)
741 {
742 log_error("set signal action of SIGCHLD error: %d\n", errno);
743 }
744
745 // Do section data loader periodically
746 while (!SYS_server_exit)
747 {
748 if (SYS_conf_reload)
749 {
750 SYS_conf_reload = 0;
751
752 // Load section config
753 if (load_section_config_from_db(0) < 0)
754 {
755 log_error("load_section_config_from_db(0) error\n");
756 }
757 else
758 {
759 log_common("Reload section config successfully\n");
760 }
761 }
762
763 // Load section articles
764 article_count = article_block_article_count();
765
766 do
767 {
768 last_aid = article_block_last_aid();
769
770 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
771 {
772 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
773
774 if (ret == ERR_UNKNOWN_SECTION)
775 {
776 SYS_conf_reload = 1; // Force reload section_list
777 }
778 }
779 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
780
781 load_count = article_block_article_count() - article_count;
782 if (load_count > 0)
783 {
784 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
785 }
786
787 if (SYS_conf_reload)
788 {
789 continue;
790 }
791
792 // Load article_op log
793 last_mid = last_article_op_log_mid;
794
795 do
796 {
797 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
798 {
799 log_error("apply_article_op_log_from_db() error\n");
800
801 if (ret == ERR_UNKNOWN_SECTION)
802 {
803 SYS_conf_reload = 1; // Force reload section_list
804 }
805 }
806 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
807
808 if (last_article_op_log_mid > last_mid)
809 {
810 log_common("Proceeded %d article logs, last_mid = %d\n", last_article_op_log_mid - last_mid, last_article_op_log_mid);
811 }
812
813 if (SYS_conf_reload)
814 {
815 continue;
816 }
817
818 for (i = 0; i < BBS_section_list_load_interval && !SYS_server_exit && !SYS_conf_reload; i++)
819 {
820 sleep(1);
821 }
822 }
823
824 // Child process exit
825
826 article_cache_cleanup();
827
828 // gen_ex_menu cleanup
829 section_list_ex_menu_set_cleanup();
830
831 // Detach data pools shm
832 detach_section_list_shm();
833 detach_article_block_shm();
834 detach_trie_dict_shm();
835
836 log_common("Section list loader process exit normally\n");
837 log_end();
838
839 section_list_loader_pid = 0;
840
841 _exit(0);
842
843 return 0;
844 }
845
846 int query_section_articles(SECTION_LIST *p_section, int page_id, ARTICLE *p_articles[],
847 int *p_article_count, int *p_page_count, int *p_ontop_start_offset)
848 {
849 ARTICLE *p_article;
850 ARTICLE *p_next_page_first_article;
851 int ret = 0;
852 int i;
853
854 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL || p_ontop_start_offset == NULL)
855 {
856 log_error("NULL pointer error\n");
857 return -1;
858 }
859
860 // acquire lock of section
861 if ((ret = section_list_rd_lock(p_section)) < 0)
862 {
863 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
864 return -2;
865 }
866
867 *p_page_count = section_list_page_count_with_ontop(p_section);
868 *p_article_count = 0;
869 *p_ontop_start_offset = BBS_article_limit_per_page;
870
871 if (p_section->visible_article_count == 0)
872 {
873 // empty section
874 }
875 else if (page_id < 0 || page_id >= *p_page_count)
876 {
877 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, *p_page_count);
878 ret = -3;
879 }
880 else
881 {
882 ret = page_id;
883
884 if (page_id <= p_section->page_count - 1)
885 {
886 p_article = p_section->p_page_first_article[page_id];
887 p_next_page_first_article =
888 (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
889
890 do
891 {
892 if (p_article->visible)
893 {
894 p_articles[*p_article_count] = p_article;
895 (*p_article_count)++;
896 }
897 p_article = p_article->p_next;
898 } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
899
900 if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
901 {
902 log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
903 }
904 }
905
906 *p_ontop_start_offset = *p_article_count;
907
908 // Append ontop articles
909 if (page_id >= p_section->page_count - 1)
910 {
911 i = (page_id == p_section->page_count - 1
912 ? 0
913 : (page_id - p_section->page_count + 1) * BBS_article_limit_per_page - p_section->last_page_visible_article_count);
914 while (*p_article_count < BBS_article_limit_per_page && i < p_section->ontop_article_count)
915 {
916 p_articles[(*p_article_count)++] = p_section->p_ontop_articles[i++];
917 }
918 }
919 }
920
921 // release lock of section
922 if (section_list_rd_unlock(p_section) < 0)
923 {
924 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
925 ret = -2;
926 }
927
928 return ret;
929 }
930
931 int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction, int step,
932 int *p_page_id, int *p_visible_offset, int *p_article_count)
933 {
934 const ARTICLE *p_article = NULL;
935 const ARTICLE *p_article_last = NULL;
936 ARTICLE *p_tmp;
937 int32_t aid = 0;
938 int page_id = 0;
939 int offset = 0;
940 int ret = 0;
941 int i;
942
943 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
944 {
945 log_error("NULL pointer error\n");
946 return -1;
947 }
948
949 // acquire lock of section
950 if ((ret = section_list_rd_lock(p_section)) < 0)
951 {
952 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
953 return -2;
954 }
955
956 if (direction == 0)
957 {
958 aid = p_article_cur->aid;
959 }
960 else if (direction == 1)
961 {
962 for (p_article = p_article_cur, p_article_last = p_article_cur;
963 step > 0 && p_article->p_topic_next->aid > p_article_cur->aid;
964 p_article = p_article->p_topic_next)
965 {
966 if (p_article->visible)
967 {
968 step--;
969 p_article_last = p_article;
970 }
971 }
972 if (!p_article->visible)
973 {
974 p_article = p_article_last;
975 }
976
977 aid = (p_article->aid > p_article_cur->aid && p_article->visible ? p_article->aid : 0);
978 }
979 else if (direction == -1)
980 {
981 for (p_article = p_article_cur, p_article_last = p_article_cur;
982 step > 0 && p_article->p_topic_prior->aid < p_article_cur->aid;
983 p_article = p_article->p_topic_prior)
984 {
985 if (p_article->visible)
986 {
987 step--;
988 p_article_last = p_article;
989 }
990 }
991 if (!p_article->visible)
992 {
993 p_article = p_article_last;
994 }
995
996 aid = (p_article->aid < p_article_cur->aid && p_article->visible ? p_article->aid : 0);
997 }
998
999 p_article = NULL;
1000
1001 if (aid > 0)
1002 {
1003 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
1004 if (p_article != NULL)
1005 {
1006 *p_article_count = (page_id == p_section->page_count - 1 ? p_section->last_page_visible_article_count : BBS_article_limit_per_page);
1007
1008 p_article = p_section->p_page_first_article[page_id];
1009 for (i = 0; i < *p_article_count && p_article != NULL;)
1010 {
1011 if (p_article->visible)
1012 {
1013 if (p_article->aid == aid)
1014 {
1015 *p_page_id = page_id;
1016 *p_visible_offset = i;
1017 break;
1018 }
1019 i++;
1020 if (i >= *p_article_count)
1021 {
1022 log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
1023 p_article = NULL;
1024 break;
1025 }
1026 }
1027 p_article = p_article->p_next;
1028 }
1029
1030 // Include ontop articles
1031 *p_article_count = section_list_page_article_count_with_ontop(p_section, page_id);
1032 }
1033 }
1034
1035 // release lock of section
1036 if (section_list_rd_unlock(p_section) < 0)
1037 {
1038 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1039 ret = -2;
1040 }
1041
1042 return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
1043 }
1044
1045 int get_section_ex_menu_set(SECTION_LIST *p_section, MENU_SET *p_ex_menu_set)
1046 {
1047 int ret = 0;
1048
1049 if (p_section == NULL || p_ex_menu_set == NULL)
1050 {
1051 log_error("NULL pointer error\n");
1052 return -1;
1053 }
1054
1055 // acquire lock of section
1056 if ((ret = section_list_rd_lock(p_section)) < 0)
1057 {
1058 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
1059 return -2;
1060 }
1061
1062 memcpy(p_ex_menu_set, &(p_section->ex_menu_set), sizeof(p_section->ex_menu_set));
1063
1064 // release lock of section
1065 if (section_list_rd_unlock(p_section) < 0)
1066 {
1067 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1068 ret = -2;
1069 }
1070
1071 return ret;
1072 }

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