/[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 1.44 - (show annotations)
Sat Oct 4 03:21:59 2025 UTC (5 months, 1 week ago) by sysadm
Branch: MAIN
Changes since 1.43: +46 -0 lines
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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 "article_view_log.h"
19 #include "bbs.h"
20 #include "database.h"
21 #include "ip_mask.h"
22 #include "log.h"
23 #include "menu.h"
24 #include "section_list_loader.h"
25 #include <errno.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31
32 int section_list_loader_pid;
33 int last_article_op_log_mid;
34
35 int load_section_config_from_db(int update_gen_ex)
36 {
37 MYSQL *db = NULL;
38 MYSQL_RES *rs = NULL, *rs2 = NULL;
39 MYSQL_ROW row, row2;
40 char sql[SQL_BUFFER_LEN];
41 int32_t sid;
42 char master_list[(BBS_username_max_len + 1) * 3 + 1];
43 SECTION_LIST *p_section;
44 char ex_menu_conf[FILE_PATH_LEN];
45 MENU_SET ex_menu_set_new;
46 int ret = 0;
47
48 db = db_open();
49 if (db == NULL)
50 {
51 log_error("db_open() error: %s\n", mysql_error(db));
52 ret = -1;
53 goto cleanup;
54 }
55
56 snprintf(sql, sizeof(sql),
57 "SELECT section_config.SID, sname, section_config.title, section_config.CID, "
58 "read_user_level, write_user_level, section_config.enable * section_class.enable AS enable, "
59 "UNIX_TIMESTAMP(ex_menu_tm) AS ex_menu_tm "
60 "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
61 "ORDER BY section_config.SID");
62
63 if (mysql_query(db, sql) != 0)
64 {
65 log_error("Query section_list error: %s\n", mysql_error(db));
66 ret = -2;
67 goto cleanup;
68 }
69 if ((rs = mysql_store_result(db)) == NULL)
70 {
71 log_error("Get section_list data failed\n");
72 ret = -2;
73 goto cleanup;
74 }
75
76 ret = 0;
77 while ((row = mysql_fetch_row(rs)))
78 {
79 sid = atoi(row[0]);
80
81 // Query section master
82 snprintf(sql, sizeof(sql),
83 "SELECT username FROM section_master "
84 "INNER JOIN user_list ON section_master.UID = user_list.UID "
85 "WHERE SID = %d AND section_master.enable AND (NOW() BETWEEN begin_dt AND end_dt) "
86 "ORDER BY major DESC, begin_dt ASC LIMIT 3",
87 sid);
88
89 if (mysql_query(db, sql) != 0)
90 {
91 log_error("Query section_master error: %s\n", mysql_error(db));
92 ret = -3;
93 break;
94 }
95 if ((rs2 = mysql_store_result(db)) == NULL)
96 {
97 log_error("Get section_master data failed\n");
98 ret = -3;
99 break;
100 }
101
102 master_list[0] = '\0';
103 while ((row2 = mysql_fetch_row(rs2)))
104 {
105 strncat(master_list, row2[0], sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
106 strncat(master_list, " ", sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
107 }
108 mysql_free_result(rs2);
109 rs2 = NULL;
110
111 p_section = section_list_find_by_sid(sid);
112
113 if (p_section == NULL)
114 {
115 p_section = section_list_create(sid, row[1], row[2], master_list);
116 if (p_section == NULL)
117 {
118 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
119 ret = -4;
120 break;
121 }
122
123 // acquire rw lock
124 ret = section_list_rw_lock(p_section);
125 if (ret < 0)
126 {
127 break;
128 }
129 }
130 else
131 {
132 // acquire rw lock
133 ret = section_list_rw_lock(p_section);
134 if (ret < 0)
135 {
136 break;
137 }
138
139 strncpy(p_section->sname, row[1], sizeof(p_section->sname) - 1);
140 p_section->sname[sizeof(p_section->sname) - 1] = '\0';
141 strncpy(p_section->stitle, row[2], sizeof(p_section->stitle) - 1);
142 p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
143 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
144 p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
145 }
146
147 p_section->class_id = atoi(row[3]);
148 p_section->read_user_level = atoi(row[4]);
149 p_section->write_user_level = atoi(row[5]);
150 p_section->enable = (int8_t)atoi(row[6]);
151
152 // Update gen_ex menu set
153 if (update_gen_ex && p_section->enable && atoi(row[7]) > p_section->ex_menu_tm)
154 {
155 snprintf(ex_menu_conf, sizeof(ex_menu_conf), "%s/%d", VAR_GEN_EX_MENU_DIR, p_section->sid);
156
157 ret = load_menu(&ex_menu_set_new, ex_menu_conf);
158 if (ret < 0)
159 {
160 unload_menu(&ex_menu_set_new);
161 log_error("load_menu(%s) error: %d\n", ex_menu_conf, ret);
162 }
163 else
164 {
165 if (p_section->ex_menu_tm > 0)
166 {
167 unload_menu(&(p_section->ex_menu_set));
168 }
169
170 ex_menu_set_new.allow_exit = 1; // Allow exit menu
171 memcpy(&(p_section->ex_menu_set), &ex_menu_set_new, sizeof(ex_menu_set_new));
172
173 p_section->ex_menu_tm = atol(row[7]);
174 #ifdef _DEBUG
175 log_common("Loaded gen_ex_menu of section %d [%s]\n", p_section->sid, p_section->sname);
176 #endif
177 }
178 }
179
180 // release rw lock
181 ret = section_list_rw_unlock(p_section);
182 if (ret < 0)
183 {
184 break;
185 }
186 }
187
188 cleanup:
189 mysql_free_result(rs2);
190 mysql_free_result(rs);
191 mysql_close(db);
192
193 return ret;
194 }
195
196 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
197 {
198 MYSQL *db = NULL;
199 MYSQL_RES *rs = NULL;
200 MYSQL_ROW row;
201 char sql[SQL_BUFFER_LEN];
202 ARTICLE article;
203 ARTICLE *p_topic;
204 SECTION_LIST *p_section = NULL;
205 int32_t last_sid = 0;
206 char sub_ip[IP_ADDR_LEN];
207 int article_count = 0;
208 int ret = 0;
209 int i;
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 article.sub_dt = atol(row[i++]);
273
274 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
275 sub_ip[sizeof(sub_ip) - 1] = '\0';
276 ip_mask(sub_ip, 1, '*');
277
278 // release lock of last section if different from current one
279 if (!global_lock && article.sid != last_sid && last_sid != 0)
280 {
281 if ((ret = section_list_rw_unlock(p_section)) < 0)
282 {
283 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
284 break;
285 }
286 }
287
288 if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
289 {
290 log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
291 ret = ERR_UNKNOWN_SECTION; // Unknown section found
292 break;
293 }
294
295 if (article.visible != 0 && article.tid != 0)
296 {
297 // Check if topic article is visible
298 p_topic = article_block_find_by_aid(article.tid);
299 if (p_topic == NULL || p_topic->visible == 0)
300 {
301 // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
302 article.tid = 0;
303 article.visible = 0;
304 }
305 }
306
307 // acquire lock of current section if different from last one
308 if (!global_lock && article.sid != last_sid)
309 {
310 if ((ret = section_list_rw_lock(p_section)) < 0)
311 {
312 log_error("section_list_rw_lock(sid=0) error\n");
313 break;
314 }
315 }
316
317 // append article to section list
318 last_sid = article.sid;
319
320 if (section_list_append_article(p_section, &article) < 0)
321 {
322 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
323 p_section->sid, article.aid);
324 ret = -3;
325 break;
326 }
327
328 article_count++;
329
330 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
331 {
332 log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
333 ret = -4;
334 break;
335 }
336 }
337
338 // release lock of last section
339 if (!global_lock && last_sid != 0)
340 {
341 if ((ret = section_list_rw_unlock(p_section)) < 0)
342 {
343 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
344 }
345 }
346
347 // release global lock
348 if (global_lock && (ret = section_list_rw_unlock(NULL)) < 0)
349 {
350 log_error("section_list_rw_unlock(sid=0) error\n");
351 }
352
353 cleanup:
354 mysql_free_result(rs);
355 mysql_close(db);
356
357 article_cache_cleanup();
358
359 return (ret < 0 ? ret : article_count);
360 }
361
362 int set_last_article_op_log_from_db(void)
363 {
364 MYSQL *db = NULL;
365 MYSQL_RES *rs = NULL;
366 MYSQL_ROW row;
367 char sql[SQL_BUFFER_LEN];
368 int ret = 0;
369
370 db = db_open();
371 if (db == NULL)
372 {
373 log_error("db_open() error: %s\n", mysql_error(db));
374 ret = -1;
375 goto cleanup;
376 }
377
378 snprintf(sql, sizeof(sql),
379 "SELECT MID FROM bbs_article_op ORDER BY MID DESC LIMIT 1");
380
381 if (mysql_query(db, sql) != 0)
382 {
383 log_error("Query article op error: %s\n", mysql_error(db));
384 ret = -2;
385 goto cleanup;
386 }
387 if ((rs = mysql_store_result(db)) == NULL)
388 {
389 log_error("Get article op data failed\n");
390 ret = -2;
391 goto cleanup;
392 }
393
394 if ((row = mysql_fetch_row(rs)))
395 {
396 last_article_op_log_mid = atoi(row[0]);
397 }
398
399 cleanup:
400 mysql_free_result(rs);
401 mysql_close(db);
402
403 return (ret < 0 ? ret : last_article_op_log_mid);
404 }
405
406 int apply_article_op_log_from_db(int op_count_limit)
407 {
408 MYSQL *db = NULL;
409 MYSQL_RES *rs = NULL, *rs2 = NULL;
410 MYSQL_ROW row, row2;
411 char sql[SQL_BUFFER_LEN];
412 ARTICLE *p_article;
413 SECTION_LIST *p_section = NULL;
414 SECTION_LIST *p_section_dest;
415 char sub_ip[IP_ADDR_LEN];
416 int32_t last_sid = 0;
417 int32_t sid_dest;
418 int op_count = 0;
419 int ret = 0;
420
421 db = db_open();
422 if (db == NULL)
423 {
424 log_error("db_open() error: %s\n", mysql_error(db));
425 ret = -1;
426 goto cleanup;
427 }
428
429 snprintf(sql, sizeof(sql),
430 "SELECT MID, AID, type FROM bbs_article_op "
431 "WHERE MID > %d AND type NOT IN ('A') "
432 "ORDER BY MID LIMIT %d",
433 last_article_op_log_mid, op_count_limit);
434
435 if (mysql_query(db, sql) != 0)
436 {
437 log_error("Query article log error: %s\n", mysql_error(db));
438 ret = -2;
439 goto cleanup;
440 }
441 if ((rs = mysql_store_result(db)) == NULL)
442 {
443 log_error("Get article log data failed\n");
444 ret = -2;
445 goto cleanup;
446 }
447
448 while ((row = mysql_fetch_row(rs)))
449 {
450 p_article = article_block_find_by_aid(atoi(row[1]));
451 if (p_article == NULL) // related article has not been appended yet
452 {
453 ret = -2;
454 break;
455 }
456
457 // release lock of last section if different from current one
458 if (p_article->sid != last_sid && last_sid != 0)
459 {
460 if ((ret = section_list_rw_unlock(p_section)) < 0)
461 {
462 log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
463 break;
464 }
465 }
466
467 if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
468 {
469 log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
470 ret = ERR_UNKNOWN_SECTION; // Unknown section found
471 break;
472 }
473
474 // acquire lock of current section if different from last one
475 if (p_article->sid != last_sid)
476 {
477 if ((ret = section_list_rw_lock(p_section)) < 0)
478 {
479 log_error("section_list_rw_lock(sid = 0) error\n");
480 break;
481 }
482 }
483
484 last_sid = p_article->sid;
485
486 switch (row[2][0])
487 {
488 case 'A': // Add article
489 log_error("Operation type=A should not be found\n");
490 break;
491 case 'D': // Delete article
492 case 'X': // Delete article by Admin
493 if (section_list_set_article_visible(p_section, atoi(row[1]), 0) < 0)
494 {
495 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=0) error\n", p_section->sid, atoi(row[1]));
496 }
497 if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
498 {
499 log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
500 }
501 break;
502 case 'S': // Restore article
503 if (section_list_set_article_visible(p_section, atoi(row[1]), 1) < 0)
504 {
505 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=1) error\n", p_section->sid, atoi(row[1]));
506 }
507 if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
508 {
509 log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
510 }
511 break;
512 case 'L': // Lock article
513 p_article->lock = 1;
514 break;
515 case 'U': // Unlock article
516 p_article->lock = 0;
517 break;
518 case 'M': // Modify article
519 snprintf(sql, sizeof(sql),
520 "SELECT bbs.CID, sub_ip, bbs_content.content "
521 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
522 "WHERE bbs.AID = %d",
523 p_article->aid);
524
525 if (mysql_query(db, sql) != 0)
526 {
527 log_error("Query article error: %s\n", mysql_error(db));
528 ret = -3;
529 break;
530 }
531 if ((rs2 = mysql_use_result(db)) == NULL)
532 {
533 log_error("Get article data failed\n");
534 ret = -3;
535 break;
536 }
537 if ((row2 = mysql_fetch_row(rs2)))
538 {
539 p_article->cid = atoi(row2[0]);
540
541 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
542 sub_ip[sizeof(sub_ip) - 1] = '\0';
543 ip_mask(sub_ip, 1, '*');
544
545 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
546 {
547 log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
548 ret = -4;
549 }
550 }
551 else
552 {
553 p_article->cid = 0;
554 ret = -4;
555 }
556 mysql_free_result(rs2);
557 rs2 = NULL;
558
559 p_article->excerption = 0; // Set excerption = 0 implicitly in case of rare condition
560 break;
561 case 'T': // Move article
562 snprintf(sql, sizeof(sql),
563 "SELECT SID FROM bbs WHERE AID = %d",
564 p_article->aid);
565
566 if (mysql_query(db, sql) != 0)
567 {
568 log_error("Query article error: %s\n", mysql_error(db));
569 ret = -3;
570 break;
571 }
572 if ((rs2 = mysql_store_result(db)) == NULL)
573 {
574 log_error("Get article data failed\n");
575 ret = -3;
576 break;
577 }
578 if ((row2 = mysql_fetch_row(rs2)))
579 {
580 sid_dest = atoi(row2[0]);
581 }
582 else
583 {
584 sid_dest = 0;
585 ret = -4;
586 }
587 mysql_free_result(rs2);
588 rs2 = NULL;
589
590 if (sid_dest > 0 && sid_dest != p_article->sid)
591 {
592 p_section_dest = section_list_find_by_sid(sid_dest);
593 if (p_section_dest == NULL)
594 {
595 ret = ERR_UNKNOWN_SECTION;
596 break;
597 }
598 // acquire lock of dest section
599 if ((ret = section_list_rw_lock(p_section_dest)) < 0)
600 {
601 log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
602 break;
603 }
604 // Move topic
605 if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
606 {
607 log_error("section_list_move_topic(src_sid=%d, dest_sid=%d, aid=%d) error (%d), retry in the next loop\n",
608 p_section->sid, p_section_dest->sid, p_article->aid, ret);
609 }
610 // release lock of dest section
611 if (section_list_rw_unlock(p_section_dest) < 0)
612 {
613 log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
614 ret = -1;
615 }
616 }
617 break;
618 case 'E': // Set article as excerption
619 p_article->excerption = 1;
620 break;
621 case 'O': // Unset article as excerption
622 p_article->excerption = 0;
623 break;
624 case 'F': // Set article on top
625 case 'V': // Unset article on top
626 p_article->ontop = (row[2][0] == 'F' ? 1 : 0);
627 if (section_list_update_article_ontop(p_section, p_article) < 0)
628 {
629 log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n",
630 p_section->sid, p_article->aid);
631 }
632 break;
633 case 'Z': // Set article as trnasship
634 p_article->transship = 1;
635 break;
636 default:
637 // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
638 break;
639 }
640
641 if (ret < 0)
642 {
643 break;
644 }
645
646 // Update MID with last successfully proceeded article_op_log
647 last_article_op_log_mid = atoi(row[0]);
648
649 op_count++;
650 }
651
652 // release lock of last section
653 if (last_sid != 0)
654 {
655 if ((ret = section_list_rw_unlock(p_section)) < 0)
656 {
657 log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
658 }
659 }
660
661 cleanup:
662 mysql_free_result(rs2);
663 mysql_free_result(rs);
664 mysql_close(db);
665
666 return (ret < 0 ? ret : op_count);
667 }
668
669 static void section_list_ex_menu_set_cleanup(void)
670 {
671 int i;
672
673 for (i = 0; i < p_section_list_pool->section_count; i++)
674 {
675 if (p_section_list_pool->sections[i].ex_menu_tm > 0)
676 {
677 unload_menu(&(p_section_list_pool->sections[i].ex_menu_set));
678 }
679 }
680 }
681
682 int section_list_loader_launch(void)
683 {
684 struct sigaction act = {0};
685 int pid;
686 int ret;
687 int32_t last_aid;
688 int article_count;
689 int load_count;
690 int last_mid;
691 int i;
692
693 if (section_list_loader_pid != 0)
694 {
695 log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
696 return -2;
697 }
698
699 pid = fork();
700
701 if (pid > 0) // Parent process
702 {
703 SYS_child_process_count++;
704 section_list_loader_pid = pid;
705 log_common("Section list loader process (pid = %d) start\n", pid);
706 return 0;
707 }
708 else if (pid < 0) // Error
709 {
710 log_error("fork() error (%d)\n", errno);
711 return -1;
712 }
713
714 // Child process
715 SYS_child_process_count = 0;
716
717 // Detach menu in shared memory
718 detach_menu_shm(&bbs_menu);
719
720 // Set signal handler
721 act.sa_handler = SIG_DFL;
722 if (sigaction(SIGHUP, &act, NULL) == -1)
723 {
724 log_error("set signal action of SIGHUP error: %d\n", errno);
725 }
726 act.sa_handler = SIG_DFL;
727 if (sigaction(SIGCHLD, &act, NULL) == -1)
728 {
729 log_error("set signal action of SIGCHLD error: %d\n", errno);
730 }
731
732 // Do section data loader periodically
733 while (!SYS_server_exit)
734 {
735 if (SYS_conf_reload)
736 {
737 SYS_conf_reload = 0;
738
739 // Load section config
740 if (load_section_config_from_db(0) < 0)
741 {
742 log_error("load_section_config_from_db(0) error\n");
743 }
744 else
745 {
746 log_common("Reload section config successfully\n");
747 }
748 }
749
750 // Load section articles
751 article_count = article_block_article_count();
752
753 do
754 {
755 last_aid = article_block_last_aid();
756
757 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
758 {
759 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
760
761 if (ret == ERR_UNKNOWN_SECTION)
762 {
763 SYS_conf_reload = 1; // Force reload section_list
764 }
765 }
766 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
767
768 load_count = article_block_article_count() - article_count;
769 if (load_count > 0)
770 {
771 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
772 }
773
774 if (SYS_conf_reload)
775 {
776 continue;
777 }
778
779 // Load article_op log
780 last_mid = last_article_op_log_mid;
781
782 do
783 {
784 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
785 {
786 log_error("apply_article_op_log_from_db() error\n");
787
788 if (ret == ERR_UNKNOWN_SECTION)
789 {
790 SYS_conf_reload = 1; // Force reload section_list
791 }
792 }
793 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
794
795 if (last_article_op_log_mid > last_mid)
796 {
797 log_common("Proceeded %d article logs, last_mid = %d\n", last_article_op_log_mid - last_mid, last_article_op_log_mid);
798 }
799
800 if (SYS_conf_reload)
801 {
802 continue;
803 }
804
805 for (i = 0; i < BBS_section_list_load_interval && !SYS_server_exit && !SYS_conf_reload; i++)
806 {
807 sleep(1);
808 }
809 }
810
811 // Child process exit
812
813 article_cache_cleanup();
814
815 // gen_ex_menu cleanup
816 section_list_ex_menu_set_cleanup();
817
818 // Detach data pools shm
819 detach_section_list_shm();
820 detach_article_block_shm();
821 detach_trie_dict_shm();
822
823 log_common("Section list loader process exit normally\n");
824 log_end();
825
826 section_list_loader_pid = 0;
827
828 _exit(0);
829
830 return 0;
831 }
832
833 int query_section_articles(SECTION_LIST *p_section, int page_id, ARTICLE *p_articles[],
834 int *p_article_count, int *p_page_count, int *p_ontop_start_offset)
835 {
836 ARTICLE *p_article;
837 ARTICLE *p_next_page_first_article;
838 int ret = 0;
839 int i;
840
841 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL || p_ontop_start_offset == NULL)
842 {
843 log_error("NULL pointer error\n");
844 return -1;
845 }
846
847 // acquire lock of section
848 if ((ret = section_list_rd_lock(p_section)) < 0)
849 {
850 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
851 return -2;
852 }
853
854 *p_page_count = section_list_page_count_with_ontop(p_section);
855 *p_article_count = 0;
856 *p_ontop_start_offset = BBS_article_limit_per_page;
857
858 if (p_section->visible_article_count == 0)
859 {
860 // empty section
861 }
862 else if (page_id < 0 || page_id >= *p_page_count)
863 {
864 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, *p_page_count);
865 ret = -3;
866 }
867 else
868 {
869 ret = page_id;
870
871 if (page_id <= p_section->page_count - 1)
872 {
873 p_article = p_section->p_page_first_article[page_id];
874 p_next_page_first_article =
875 (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
876
877 do
878 {
879 if (p_article->visible)
880 {
881 p_articles[*p_article_count] = p_article;
882 (*p_article_count)++;
883 }
884 p_article = p_article->p_next;
885 } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
886
887 if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
888 {
889 log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
890 }
891 }
892
893 *p_ontop_start_offset = *p_article_count;
894
895 // Append ontop articles
896 if (page_id >= p_section->page_count - 1)
897 {
898 i = (page_id == p_section->page_count - 1
899 ? 0
900 : (page_id - p_section->page_count + 1) * BBS_article_limit_per_page - p_section->last_page_visible_article_count);
901 while (*p_article_count < BBS_article_limit_per_page && i < p_section->ontop_article_count)
902 {
903 p_articles[(*p_article_count)++] = p_section->p_ontop_articles[i++];
904 }
905 }
906 }
907
908 // release lock of section
909 if (section_list_rd_unlock(p_section) < 0)
910 {
911 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
912 ret = -2;
913 }
914
915 return ret;
916 }
917
918 int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction, int step,
919 int *p_page_id, int *p_visible_offset, int *p_article_count)
920 {
921 const ARTICLE *p_article = NULL;
922 const ARTICLE *p_article_last = NULL;
923 ARTICLE *p_tmp;
924 int32_t aid = 0;
925 int page_id = 0;
926 int offset = 0;
927 int ret = 0;
928 int i;
929
930 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
931 {
932 log_error("NULL pointer error\n");
933 return -1;
934 }
935
936 // acquire lock of section
937 if ((ret = section_list_rd_lock(p_section)) < 0)
938 {
939 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
940 return -2;
941 }
942
943 if (direction == 0)
944 {
945 aid = p_article_cur->aid;
946 }
947 else if (direction == 1)
948 {
949 for (p_article_last = p_article_cur, p_article = p_article_cur->p_topic_next;
950 step > 0 && p_article->aid > p_article_cur->aid;
951 p_article = p_article->p_topic_next)
952 {
953 if (p_article->visible)
954 {
955 step--;
956 p_article_last = p_article;
957 }
958 }
959 p_article = p_article_last;
960
961 aid = (p_article->aid > p_article_cur->aid && p_article->visible ? p_article->aid : 0);
962 }
963 else if (direction == -1)
964 {
965 for (p_article_last = p_article_cur, p_article = p_article_cur->p_topic_prior;
966 step > 0 && p_article->aid < p_article_cur->aid;
967 p_article = p_article->p_topic_prior)
968 {
969 if (p_article->visible)
970 {
971 step--;
972 p_article_last = p_article;
973 }
974 }
975 p_article = p_article_last;
976
977 aid = (p_article->aid < p_article_cur->aid && p_article->visible ? p_article->aid : 0);
978 }
979
980 p_article = NULL;
981
982 if (aid > 0)
983 {
984 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
985 if (p_article != NULL)
986 {
987 *p_article_count = (page_id == p_section->page_count - 1 ? p_section->last_page_visible_article_count : BBS_article_limit_per_page);
988
989 p_article = p_section->p_page_first_article[page_id];
990 for (i = 0; i < *p_article_count && p_article != NULL;)
991 {
992 if (p_article->visible)
993 {
994 if (p_article->aid == aid)
995 {
996 *p_page_id = page_id;
997 *p_visible_offset = i;
998 break;
999 }
1000 i++;
1001 if (i >= *p_article_count)
1002 {
1003 log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
1004 p_article = NULL;
1005 break;
1006 }
1007 }
1008 p_article = p_article->p_next;
1009 }
1010
1011 // Include ontop articles
1012 *p_article_count = section_list_page_article_count_with_ontop(p_section, page_id);
1013 }
1014 }
1015
1016 // release lock of section
1017 if (section_list_rd_unlock(p_section) < 0)
1018 {
1019 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1020 ret = -2;
1021 }
1022
1023 return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
1024 }
1025
1026 int scan_unread_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, const ARTICLE **pp_article_unread)
1027 {
1028 ARTICLE *p_article;
1029 int ret = 0;
1030
1031 if (p_section == NULL || p_article_cur == NULL || pp_article_unread == NULL)
1032 {
1033 log_error("NULL pointer error\n");
1034 return -1;
1035 }
1036
1037 if (p_article_cur->sid != p_section->sid)
1038 {
1039 log_error("Inconsistent SID\n");
1040 return -1;
1041 }
1042
1043 // acquire lock of section
1044 if ((ret = section_list_rd_lock(p_section)) < 0)
1045 {
1046 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
1047 return -2;
1048 }
1049
1050 *pp_article_unread = NULL;
1051
1052 for (p_article = p_article_cur->p_next; p_article != NULL && p_article != p_article_cur; p_article = p_article->p_next)
1053 {
1054 if (p_article->visible && !article_view_log_is_viewed(p_article->aid, &BBS_article_view_log))
1055 {
1056 *pp_article_unread = p_article;
1057 break;
1058 }
1059 }
1060
1061 // release lock of section
1062 if (section_list_rd_unlock(p_section) < 0)
1063 {
1064 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1065 return -2;
1066 }
1067
1068 return (p_article != NULL && p_article != p_article_cur ? 1 : 0);
1069 }
1070
1071 int get_section_ex_menu_set(SECTION_LIST *p_section, MENU_SET *p_ex_menu_set)
1072 {
1073 int ret = 0;
1074
1075 if (p_section == NULL || p_ex_menu_set == NULL)
1076 {
1077 log_error("NULL pointer error\n");
1078 return -1;
1079 }
1080
1081 // acquire lock of section
1082 if ((ret = section_list_rd_lock(p_section)) < 0)
1083 {
1084 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
1085 return -2;
1086 }
1087
1088 memcpy(p_ex_menu_set, &(p_section->ex_menu_set), sizeof(p_section->ex_menu_set));
1089
1090 // release lock of section
1091 if (section_list_rd_unlock(p_section) < 0)
1092 {
1093 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1094 ret = -2;
1095 }
1096
1097 return ret;
1098 }

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