/[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 1.46 - (show annotations)
Mon Oct 6 11:51:03 2025 UTC (5 months, 1 week ago) by sysadm
Branch: MAIN
Changes since 1.45: +5 -1 lines
Content type: text/x-csrc
Fix bug in passing NULL pointer to atoi / atol

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 "user_priv.h"
26 #include <errno.h>
27 #include <signal.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32
33 int section_list_loader_pid;
34 int last_article_op_log_mid;
35
36 int load_section_config_from_db(int update_gen_ex)
37 {
38 MYSQL *db = NULL;
39 MYSQL_RES *rs = NULL, *rs2 = NULL;
40 MYSQL_ROW row, row2;
41 char sql[SQL_BUFFER_LEN];
42 int32_t sid;
43 char master_list[(BBS_username_max_len + 1) * 3 + 1];
44 SECTION_LIST *p_section;
45 char ex_menu_conf[FILE_PATH_LEN];
46 MENU_SET ex_menu_set_new;
47 int ret = 0;
48
49 db = db_open();
50 if (db == NULL)
51 {
52 log_error("db_open() error: %s\n", mysql_error(db));
53 ret = -1;
54 goto cleanup;
55 }
56
57 snprintf(sql, sizeof(sql),
58 "SELECT section_config.SID, sname, section_config.title, section_config.CID, "
59 "read_user_level, write_user_level, section_config.enable * section_class.enable AS enable, "
60 "UNIX_TIMESTAMP(ex_menu_tm) AS ex_menu_tm "
61 "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
62 "ORDER BY section_config.SID");
63
64 if (mysql_query(db, sql) != 0)
65 {
66 log_error("Query section_list error: %s\n", mysql_error(db));
67 ret = -2;
68 goto cleanup;
69 }
70 if ((rs = mysql_store_result(db)) == NULL)
71 {
72 log_error("Get section_list data failed\n");
73 ret = -2;
74 goto cleanup;
75 }
76
77 ret = 0;
78 while ((row = mysql_fetch_row(rs)))
79 {
80 sid = atoi(row[0]);
81
82 // Query section master
83 snprintf(sql, sizeof(sql),
84 "SELECT username FROM section_master "
85 "INNER JOIN user_list ON section_master.UID = user_list.UID "
86 "WHERE SID = %d AND section_master.enable AND (NOW() BETWEEN begin_dt AND end_dt) "
87 "ORDER BY major DESC, begin_dt ASC LIMIT 3",
88 sid);
89
90 if (mysql_query(db, sql) != 0)
91 {
92 log_error("Query section_master error: %s\n", mysql_error(db));
93 ret = -3;
94 break;
95 }
96 if ((rs2 = mysql_store_result(db)) == NULL)
97 {
98 log_error("Get section_master data failed\n");
99 ret = -3;
100 break;
101 }
102
103 master_list[0] = '\0';
104 while ((row2 = mysql_fetch_row(rs2)))
105 {
106 strncat(master_list, row2[0], sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
107 strncat(master_list, " ", sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
108 }
109 mysql_free_result(rs2);
110 rs2 = NULL;
111
112 p_section = section_list_find_by_sid(sid);
113
114 if (p_section == NULL)
115 {
116 p_section = section_list_create(sid, row[1], row[2], master_list);
117 if (p_section == NULL)
118 {
119 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
120 ret = -4;
121 break;
122 }
123
124 // acquire rw lock
125 ret = section_list_rw_lock(p_section);
126 if (ret < 0)
127 {
128 break;
129 }
130 }
131 else
132 {
133 // acquire rw lock
134 ret = section_list_rw_lock(p_section);
135 if (ret < 0)
136 {
137 break;
138 }
139
140 strncpy(p_section->sname, row[1], sizeof(p_section->sname) - 1);
141 p_section->sname[sizeof(p_section->sname) - 1] = '\0';
142 strncpy(p_section->stitle, row[2], sizeof(p_section->stitle) - 1);
143 p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
144 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
145 p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
146 }
147
148 p_section->class_id = atoi(row[3]);
149 p_section->read_user_level = atoi(row[4]);
150 p_section->write_user_level = atoi(row[5]);
151 p_section->enable = (int8_t)atoi(row[6]);
152
153 // Update gen_ex menu set
154 if (update_gen_ex && p_section->enable && atol(row[7] == NULL ? "0" : row[7]) > p_section->ex_menu_tm)
155 {
156 snprintf(ex_menu_conf, sizeof(ex_menu_conf), "%s/%d", VAR_GEN_EX_MENU_DIR, p_section->sid);
157
158 ret = load_menu(&ex_menu_set_new, ex_menu_conf);
159 if (ret < 0)
160 {
161 unload_menu(&ex_menu_set_new);
162 log_error("load_menu(%s) error: %d\n", ex_menu_conf, ret);
163 }
164 else
165 {
166 if (p_section->ex_menu_tm > 0)
167 {
168 unload_menu(&(p_section->ex_menu_set));
169 }
170
171 ex_menu_set_new.allow_exit = 1; // Allow exit menu
172 memcpy(&(p_section->ex_menu_set), &ex_menu_set_new, sizeof(ex_menu_set_new));
173
174 p_section->ex_menu_tm = atol(row[7]);
175 #ifdef _DEBUG
176 log_common("Loaded gen_ex_menu of section %d [%s]\n", p_section->sid, p_section->sname);
177 #endif
178 }
179 }
180 else
181 {
182 p_section->ex_menu_tm = 0;
183 }
184
185 // release rw lock
186 ret = section_list_rw_unlock(p_section);
187 if (ret < 0)
188 {
189 break;
190 }
191 }
192
193 cleanup:
194 mysql_free_result(rs2);
195 mysql_free_result(rs);
196 mysql_close(db);
197
198 return ret;
199 }
200
201 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
202 {
203 MYSQL *db = NULL;
204 MYSQL_RES *rs = NULL;
205 MYSQL_ROW row;
206 char sql[SQL_BUFFER_LEN];
207 ARTICLE article;
208 ARTICLE *p_topic;
209 SECTION_LIST *p_section = NULL;
210 int32_t last_sid = 0;
211 char sub_ip[IP_ADDR_LEN];
212 int article_count = 0;
213 int ret = 0;
214 int i;
215
216 db = db_open();
217 if (db == NULL)
218 {
219 log_error("db_open() error: %s\n", mysql_error(db));
220 ret = -1;
221 goto cleanup;
222 }
223
224 snprintf(sql, sizeof(sql),
225 "SELECT bbs.AID, TID, SID, bbs.CID, UID, visible, excerption, ontop, `lock`, "
226 "transship, username, nickname, title, UNIX_TIMESTAMP(sub_dt) AS sub_dt, "
227 "sub_ip, bbs_content.content "
228 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
229 "WHERE bbs.AID >= %d ORDER BY bbs.AID LIMIT %d",
230 start_aid, article_count_limit);
231
232 if (mysql_query(db, sql) != 0)
233 {
234 log_error("Query article list error: %s\n", mysql_error(db));
235 ret = -2;
236 goto cleanup;
237 }
238 if ((rs = mysql_use_result(db)) == NULL)
239 {
240 log_error("Get article list data failed\n");
241 ret = -2;
242 goto cleanup;
243 }
244
245 // acquire global lock
246 if (global_lock && (ret = section_list_rw_lock(NULL)) < 0)
247 {
248 log_error("section_list_rw_lock(sid = 0) error\n");
249 goto cleanup;
250 }
251
252 while ((row = mysql_fetch_row(rs)))
253 {
254 memset(&article, 0, sizeof(ARTICLE));
255
256 // copy data of article
257 i = 0;
258
259 article.aid = atoi(row[i++]);
260 article.tid = atoi(row[i++]);
261 article.sid = atoi(row[i++]);
262 article.cid = atoi(row[i++]);
263 article.uid = atoi(row[i++]);
264 article.visible = (int8_t)atoi(row[i++]);
265 article.excerption = (int8_t)atoi(row[i++]);
266 article.ontop = (int8_t)atoi(row[i++]);
267 article.lock = (int8_t)atoi(row[i++]);
268 article.transship = (int8_t)atoi(row[i++]);
269
270 strncpy(article.username, row[i++], sizeof(article.username) - 1);
271 article.username[sizeof(article.username) - 1] = '\0';
272 strncpy(article.nickname, row[i++], sizeof(article.nickname) - 1);
273 article.nickname[sizeof(article.nickname) - 1] = '\0';
274 strncpy(article.title, row[i++], sizeof(article.title) - 1);
275 article.title[sizeof(article.title) - 1] = '\0';
276
277 article.sub_dt = atol(row[i++]);
278
279 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
280 sub_ip[sizeof(sub_ip) - 1] = '\0';
281 ip_mask(sub_ip, 1, '*');
282
283 // release lock of last section if different from current one
284 if (!global_lock && article.sid != last_sid && last_sid != 0)
285 {
286 if ((ret = section_list_rw_unlock(p_section)) < 0)
287 {
288 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
289 break;
290 }
291 }
292
293 if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
294 {
295 log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
296 ret = ERR_UNKNOWN_SECTION; // Unknown section found
297 break;
298 }
299
300 if (article.visible != 0 && article.tid != 0)
301 {
302 // Check if topic article is visible
303 p_topic = article_block_find_by_aid(article.tid);
304 if (p_topic == NULL || p_topic->visible == 0)
305 {
306 // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
307 article.tid = 0;
308 article.visible = 0;
309 }
310 }
311
312 // acquire lock of current section if different from last one
313 if (!global_lock && article.sid != last_sid)
314 {
315 if ((ret = section_list_rw_lock(p_section)) < 0)
316 {
317 log_error("section_list_rw_lock(sid=0) error\n");
318 break;
319 }
320 }
321
322 // append article to section list
323 last_sid = article.sid;
324
325 if (section_list_append_article(p_section, &article) < 0)
326 {
327 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
328 p_section->sid, article.aid);
329 ret = -3;
330 break;
331 }
332
333 article_count++;
334
335 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
336 {
337 log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
338 ret = -4;
339 break;
340 }
341 }
342
343 // release lock of last section
344 if (!global_lock && last_sid != 0)
345 {
346 if ((ret = section_list_rw_unlock(p_section)) < 0)
347 {
348 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
349 }
350 }
351
352 // release global lock
353 if (global_lock && (ret = section_list_rw_unlock(NULL)) < 0)
354 {
355 log_error("section_list_rw_unlock(sid=0) error\n");
356 }
357
358 cleanup:
359 mysql_free_result(rs);
360 mysql_close(db);
361
362 article_cache_cleanup();
363
364 return (ret < 0 ? ret : article_count);
365 }
366
367 int set_last_article_op_log_from_db(void)
368 {
369 MYSQL *db = NULL;
370 MYSQL_RES *rs = NULL;
371 MYSQL_ROW row;
372 char sql[SQL_BUFFER_LEN];
373 int ret = 0;
374
375 db = db_open();
376 if (db == NULL)
377 {
378 log_error("db_open() error: %s\n", mysql_error(db));
379 ret = -1;
380 goto cleanup;
381 }
382
383 snprintf(sql, sizeof(sql),
384 "SELECT MID FROM bbs_article_op ORDER BY MID DESC LIMIT 1");
385
386 if (mysql_query(db, sql) != 0)
387 {
388 log_error("Query article op error: %s\n", mysql_error(db));
389 ret = -2;
390 goto cleanup;
391 }
392 if ((rs = mysql_store_result(db)) == NULL)
393 {
394 log_error("Get article op data failed\n");
395 ret = -2;
396 goto cleanup;
397 }
398
399 if ((row = mysql_fetch_row(rs)))
400 {
401 last_article_op_log_mid = atoi(row[0]);
402 }
403
404 cleanup:
405 mysql_free_result(rs);
406 mysql_close(db);
407
408 return (ret < 0 ? ret : last_article_op_log_mid);
409 }
410
411 int apply_article_op_log_from_db(int op_count_limit)
412 {
413 MYSQL *db = NULL;
414 MYSQL_RES *rs = NULL, *rs2 = NULL;
415 MYSQL_ROW row, row2;
416 char sql[SQL_BUFFER_LEN];
417 ARTICLE *p_article;
418 SECTION_LIST *p_section = NULL;
419 SECTION_LIST *p_section_dest;
420 char sub_ip[IP_ADDR_LEN];
421 int32_t last_sid = 0;
422 int32_t sid_dest;
423 int op_count = 0;
424 int ret = 0;
425
426 db = db_open();
427 if (db == NULL)
428 {
429 log_error("db_open() error: %s\n", mysql_error(db));
430 ret = -1;
431 goto cleanup;
432 }
433
434 snprintf(sql, sizeof(sql),
435 "SELECT MID, AID, type FROM bbs_article_op "
436 "WHERE MID > %d AND type NOT IN ('A') "
437 "ORDER BY MID LIMIT %d",
438 last_article_op_log_mid, op_count_limit);
439
440 if (mysql_query(db, sql) != 0)
441 {
442 log_error("Query article log error: %s\n", mysql_error(db));
443 ret = -2;
444 goto cleanup;
445 }
446 if ((rs = mysql_store_result(db)) == NULL)
447 {
448 log_error("Get article log data failed\n");
449 ret = -2;
450 goto cleanup;
451 }
452
453 while ((row = mysql_fetch_row(rs)))
454 {
455 p_article = article_block_find_by_aid(atoi(row[1]));
456 if (p_article == NULL) // related article has not been appended yet
457 {
458 ret = -2;
459 break;
460 }
461
462 // release lock of last section if different from current one
463 if (p_article->sid != last_sid && last_sid != 0)
464 {
465 if ((ret = section_list_rw_unlock(p_section)) < 0)
466 {
467 log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
468 break;
469 }
470 }
471
472 if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
473 {
474 log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
475 ret = ERR_UNKNOWN_SECTION; // Unknown section found
476 break;
477 }
478
479 // acquire lock of current section if different from last one
480 if (p_article->sid != last_sid)
481 {
482 if ((ret = section_list_rw_lock(p_section)) < 0)
483 {
484 log_error("section_list_rw_lock(sid = 0) error\n");
485 break;
486 }
487 }
488
489 last_sid = p_article->sid;
490
491 switch (row[2][0])
492 {
493 case 'A': // Add article
494 log_error("Operation type=A should not be found\n");
495 break;
496 case 'D': // Delete article
497 case 'X': // Delete article by Admin
498 if (section_list_set_article_visible(p_section, atoi(row[1]), 0) < 0)
499 {
500 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=0) error\n", p_section->sid, atoi(row[1]));
501 }
502 if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
503 {
504 log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
505 }
506 break;
507 case 'S': // Restore article
508 if (section_list_set_article_visible(p_section, atoi(row[1]), 1) < 0)
509 {
510 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=1) error\n", p_section->sid, atoi(row[1]));
511 }
512 if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
513 {
514 log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
515 }
516 break;
517 case 'L': // Lock article
518 p_article->lock = 1;
519 break;
520 case 'U': // Unlock article
521 p_article->lock = 0;
522 break;
523 case 'M': // Modify article
524 snprintf(sql, sizeof(sql),
525 "SELECT bbs.CID, sub_ip, bbs_content.content "
526 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
527 "WHERE bbs.AID = %d",
528 p_article->aid);
529
530 if (mysql_query(db, sql) != 0)
531 {
532 log_error("Query article error: %s\n", mysql_error(db));
533 ret = -3;
534 break;
535 }
536 if ((rs2 = mysql_use_result(db)) == NULL)
537 {
538 log_error("Get article data failed\n");
539 ret = -3;
540 break;
541 }
542 if ((row2 = mysql_fetch_row(rs2)))
543 {
544 p_article->cid = atoi(row2[0]);
545
546 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
547 sub_ip[sizeof(sub_ip) - 1] = '\0';
548 ip_mask(sub_ip, 1, '*');
549
550 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
551 {
552 log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
553 ret = -4;
554 }
555 }
556 else
557 {
558 p_article->cid = 0;
559 ret = -4;
560 }
561 mysql_free_result(rs2);
562 rs2 = NULL;
563
564 p_article->excerption = 0; // Set excerption = 0 implicitly in case of rare condition
565 break;
566 case 'T': // Move article
567 snprintf(sql, sizeof(sql),
568 "SELECT SID FROM bbs WHERE AID = %d",
569 p_article->aid);
570
571 if (mysql_query(db, sql) != 0)
572 {
573 log_error("Query article error: %s\n", mysql_error(db));
574 ret = -3;
575 break;
576 }
577 if ((rs2 = mysql_store_result(db)) == NULL)
578 {
579 log_error("Get article data failed\n");
580 ret = -3;
581 break;
582 }
583 if ((row2 = mysql_fetch_row(rs2)))
584 {
585 sid_dest = atoi(row2[0]);
586 }
587 else
588 {
589 sid_dest = 0;
590 ret = -4;
591 }
592 mysql_free_result(rs2);
593 rs2 = NULL;
594
595 if (sid_dest > 0 && sid_dest != p_article->sid)
596 {
597 p_section_dest = section_list_find_by_sid(sid_dest);
598 if (p_section_dest == NULL)
599 {
600 ret = ERR_UNKNOWN_SECTION;
601 break;
602 }
603 // acquire lock of dest section
604 if ((ret = section_list_rw_lock(p_section_dest)) < 0)
605 {
606 log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
607 break;
608 }
609 // Move topic
610 if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
611 {
612 log_error("section_list_move_topic(src_sid=%d, dest_sid=%d, aid=%d) error (%d), retry in the next loop\n",
613 p_section->sid, p_section_dest->sid, p_article->aid, ret);
614 }
615 // release lock of dest section
616 if (section_list_rw_unlock(p_section_dest) < 0)
617 {
618 log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
619 ret = -1;
620 }
621 }
622 break;
623 case 'E': // Set article as excerption
624 p_article->excerption = 1;
625 break;
626 case 'O': // Unset article as excerption
627 p_article->excerption = 0;
628 break;
629 case 'F': // Set article on top
630 case 'V': // Unset article on top
631 p_article->ontop = (row[2][0] == 'F' ? 1 : 0);
632 if (section_list_update_article_ontop(p_section, p_article) < 0)
633 {
634 log_error("section_list_update_article_ontop(sid=%d, aid=%d) error\n",
635 p_section->sid, p_article->aid);
636 }
637 break;
638 case 'Z': // Set article as trnasship
639 p_article->transship = 1;
640 break;
641 default:
642 // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
643 break;
644 }
645
646 if (ret < 0)
647 {
648 break;
649 }
650
651 // Update MID with last successfully proceeded article_op_log
652 last_article_op_log_mid = atoi(row[0]);
653
654 op_count++;
655 }
656
657 // release lock of last section
658 if (last_sid != 0)
659 {
660 if ((ret = section_list_rw_unlock(p_section)) < 0)
661 {
662 log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
663 }
664 }
665
666 cleanup:
667 mysql_free_result(rs2);
668 mysql_free_result(rs);
669 mysql_close(db);
670
671 return (ret < 0 ? ret : op_count);
672 }
673
674 static void section_list_ex_menu_set_cleanup(void)
675 {
676 int i;
677
678 for (i = 0; i < p_section_list_pool->section_count; i++)
679 {
680 if (p_section_list_pool->sections[i].ex_menu_tm > 0)
681 {
682 unload_menu(&(p_section_list_pool->sections[i].ex_menu_set));
683 }
684 }
685 }
686
687 int section_list_loader_launch(void)
688 {
689 struct sigaction act = {0};
690 int pid;
691 int ret;
692 int32_t last_aid;
693 int article_count;
694 int load_count;
695 int last_mid;
696 int i;
697
698 if (section_list_loader_pid != 0)
699 {
700 log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
701 return -2;
702 }
703
704 pid = fork();
705
706 if (pid > 0) // Parent process
707 {
708 SYS_child_process_count++;
709 section_list_loader_pid = pid;
710 log_common("Section list loader process (pid = %d) start\n", pid);
711 return 0;
712 }
713 else if (pid < 0) // Error
714 {
715 log_error("fork() error (%d)\n", errno);
716 return -1;
717 }
718
719 // Child process
720 SYS_child_process_count = 0;
721
722 // Detach menu in shared memory
723 detach_menu_shm(&bbs_menu);
724
725 // Set signal handler
726 act.sa_handler = SIG_DFL;
727 if (sigaction(SIGHUP, &act, NULL) == -1)
728 {
729 log_error("set signal action of SIGHUP error: %d\n", errno);
730 }
731 act.sa_handler = SIG_DFL;
732 if (sigaction(SIGCHLD, &act, NULL) == -1)
733 {
734 log_error("set signal action of SIGCHLD error: %d\n", errno);
735 }
736
737 // Do section data loader periodically
738 while (!SYS_server_exit)
739 {
740 if (SYS_conf_reload)
741 {
742 SYS_conf_reload = 0;
743
744 // Load section config
745 if (load_section_config_from_db(0) < 0)
746 {
747 log_error("load_section_config_from_db(0) error\n");
748 }
749 else
750 {
751 log_common("Reload section config successfully\n");
752 }
753 }
754
755 // Load section articles
756 article_count = article_block_article_count();
757
758 do
759 {
760 last_aid = article_block_last_aid();
761
762 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
763 {
764 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
765
766 if (ret == ERR_UNKNOWN_SECTION)
767 {
768 SYS_conf_reload = 1; // Force reload section_list
769 }
770 }
771 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
772
773 load_count = article_block_article_count() - article_count;
774 if (load_count > 0)
775 {
776 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
777 }
778
779 if (SYS_conf_reload)
780 {
781 continue;
782 }
783
784 // Load article_op log
785 last_mid = last_article_op_log_mid;
786
787 do
788 {
789 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
790 {
791 log_error("apply_article_op_log_from_db() error\n");
792
793 if (ret == ERR_UNKNOWN_SECTION)
794 {
795 SYS_conf_reload = 1; // Force reload section_list
796 }
797 }
798 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
799
800 if (last_article_op_log_mid > last_mid)
801 {
802 log_common("Proceeded %d article logs, last_mid = %d\n", last_article_op_log_mid - last_mid, last_article_op_log_mid);
803 }
804
805 if (SYS_conf_reload)
806 {
807 continue;
808 }
809
810 for (i = 0; i < BBS_section_list_load_interval && !SYS_server_exit && !SYS_conf_reload; i++)
811 {
812 sleep(1);
813 }
814 }
815
816 // Child process exit
817
818 article_cache_cleanup();
819
820 // gen_ex_menu cleanup
821 section_list_ex_menu_set_cleanup();
822
823 // Detach data pools shm
824 detach_section_list_shm();
825 detach_article_block_shm();
826 detach_trie_dict_shm();
827
828 log_common("Section list loader process exit normally\n");
829 log_end();
830
831 section_list_loader_pid = 0;
832
833 _exit(0);
834
835 return 0;
836 }
837
838 int query_section_articles(SECTION_LIST *p_section, int page_id, ARTICLE *p_articles[],
839 int *p_article_count, int *p_page_count, int *p_ontop_start_offset)
840 {
841 ARTICLE *p_article;
842 ARTICLE *p_next_page_first_article;
843 int ret = 0;
844 int i;
845
846 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL || p_ontop_start_offset == NULL)
847 {
848 log_error("NULL pointer error\n");
849 return -1;
850 }
851
852 // acquire lock of section
853 if ((ret = section_list_rd_lock(p_section)) < 0)
854 {
855 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
856 return -2;
857 }
858
859 *p_page_count = section_list_page_count_with_ontop(p_section);
860 *p_article_count = 0;
861 *p_ontop_start_offset = BBS_article_limit_per_page;
862
863 if (p_section->visible_article_count == 0)
864 {
865 // empty section
866 }
867 else if (page_id < 0 || page_id >= *p_page_count)
868 {
869 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, *p_page_count);
870 ret = -3;
871 }
872 else
873 {
874 ret = page_id;
875
876 if (page_id <= p_section->page_count - 1)
877 {
878 p_article = p_section->p_page_first_article[page_id];
879 p_next_page_first_article =
880 (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
881
882 do
883 {
884 if (p_article->visible)
885 {
886 p_articles[*p_article_count] = p_article;
887 (*p_article_count)++;
888 }
889 p_article = p_article->p_next;
890 } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
891
892 if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
893 {
894 log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
895 }
896 }
897
898 *p_ontop_start_offset = *p_article_count;
899
900 // Append ontop articles
901 if (page_id >= p_section->page_count - 1)
902 {
903 i = (page_id == p_section->page_count - 1
904 ? 0
905 : (page_id - p_section->page_count + 1) * BBS_article_limit_per_page - p_section->last_page_visible_article_count);
906 while (*p_article_count < BBS_article_limit_per_page && i < p_section->ontop_article_count)
907 {
908 p_articles[(*p_article_count)++] = p_section->p_ontop_articles[i++];
909 }
910 }
911 }
912
913 // release lock of section
914 if (section_list_rd_unlock(p_section) < 0)
915 {
916 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
917 ret = -2;
918 }
919
920 return ret;
921 }
922
923 int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction, int step,
924 int *p_page_id, int *p_visible_offset, int *p_article_count)
925 {
926 const ARTICLE *p_article = NULL;
927 const ARTICLE *p_article_last = NULL;
928 ARTICLE *p_tmp;
929 int32_t aid = 0;
930 int page_id = 0;
931 int offset = 0;
932 int ret = 0;
933 int i;
934
935 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
936 {
937 log_error("NULL pointer error\n");
938 return -1;
939 }
940
941 // acquire lock of section
942 if ((ret = section_list_rd_lock(p_section)) < 0)
943 {
944 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
945 return -2;
946 }
947
948 if (direction == 0)
949 {
950 aid = p_article_cur->aid;
951 }
952 else if (direction == 1)
953 {
954 for (p_article_last = p_article_cur, p_article = p_article_cur->p_topic_next;
955 step > 0 && p_article->aid > p_article_cur->aid;
956 p_article = p_article->p_topic_next)
957 {
958 if (p_article->visible)
959 {
960 step--;
961 p_article_last = p_article;
962 }
963 }
964 p_article = p_article_last;
965
966 aid = (p_article->aid > p_article_cur->aid && p_article->visible ? p_article->aid : 0);
967 }
968 else if (direction == -1)
969 {
970 for (p_article_last = p_article_cur, p_article = p_article_cur->p_topic_prior;
971 step > 0 && p_article->aid < p_article_cur->aid;
972 p_article = p_article->p_topic_prior)
973 {
974 if (p_article->visible)
975 {
976 step--;
977 p_article_last = p_article;
978 }
979 }
980 p_article = p_article_last;
981
982 aid = (p_article->aid < p_article_cur->aid && p_article->visible ? p_article->aid : 0);
983 }
984
985 p_article = NULL;
986
987 if (aid > 0)
988 {
989 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
990 if (p_article != NULL)
991 {
992 *p_article_count = (page_id == p_section->page_count - 1 ? p_section->last_page_visible_article_count : BBS_article_limit_per_page);
993
994 p_article = p_section->p_page_first_article[page_id];
995 for (i = 0; i < *p_article_count && p_article != NULL;)
996 {
997 if (p_article->visible)
998 {
999 if (p_article->aid == aid)
1000 {
1001 *p_page_id = page_id;
1002 *p_visible_offset = i;
1003 break;
1004 }
1005 i++;
1006 if (i >= *p_article_count)
1007 {
1008 log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
1009 p_article = NULL;
1010 break;
1011 }
1012 }
1013 p_article = p_article->p_next;
1014 }
1015
1016 // Include ontop articles
1017 *p_article_count = section_list_page_article_count_with_ontop(p_section, page_id);
1018 }
1019 }
1020
1021 // release lock of section
1022 if (section_list_rd_unlock(p_section) < 0)
1023 {
1024 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1025 ret = -2;
1026 }
1027
1028 return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
1029 }
1030
1031 int scan_unread_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, const ARTICLE **pp_article_unread)
1032 {
1033 ARTICLE *p_article;
1034 int ret = 0;
1035
1036 if (p_section == NULL || p_article_cur == NULL || pp_article_unread == NULL)
1037 {
1038 log_error("NULL pointer error\n");
1039 return -1;
1040 }
1041
1042 if (p_article_cur->sid != p_section->sid)
1043 {
1044 log_error("Inconsistent SID\n");
1045 return -1;
1046 }
1047
1048 // acquire lock of section
1049 if ((ret = section_list_rd_lock(p_section)) < 0)
1050 {
1051 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
1052 return -2;
1053 }
1054
1055 *pp_article_unread = NULL;
1056
1057 for (p_article = p_article_cur->p_next; p_article != NULL && p_article != p_article_cur; p_article = p_article->p_next)
1058 {
1059 if (p_article->visible && p_article->uid != BBS_priv.uid && !article_view_log_is_viewed(p_article->aid, &BBS_article_view_log))
1060 {
1061 *pp_article_unread = p_article;
1062 break;
1063 }
1064 }
1065
1066 // release lock of section
1067 if (section_list_rd_unlock(p_section) < 0)
1068 {
1069 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1070 return -2;
1071 }
1072
1073 return (p_article != NULL && p_article != p_article_cur ? 1 : 0);
1074 }
1075
1076 int get_section_ex_menu_set(SECTION_LIST *p_section, MENU_SET *p_ex_menu_set)
1077 {
1078 int ret = 0;
1079
1080 if (p_section == NULL || p_ex_menu_set == NULL)
1081 {
1082 log_error("NULL pointer error\n");
1083 return -1;
1084 }
1085
1086 // acquire lock of section
1087 if ((ret = section_list_rd_lock(p_section)) < 0)
1088 {
1089 log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
1090 return -2;
1091 }
1092
1093 memcpy(p_ex_menu_set, &(p_section->ex_menu_set), sizeof(p_section->ex_menu_set));
1094
1095 // release lock of section
1096 if (section_list_rd_unlock(p_section) < 0)
1097 {
1098 log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
1099 ret = -2;
1100 }
1101
1102 return ret;
1103 }

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