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

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Revision 1.20 - (hide annotations)
Sat Jun 14 11:57:52 2025 UTC (9 months ago) by sysadm
Branch: MAIN
Changes since 1.19: +14 -9 lines
Content type: text/x-csrc 
Use section_list methods to avoid page inconsistency
1 sysadm 1.1 /***************************************************************************
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 "section_list_loader.h"
18 sysadm 1.11 #include "article_cache.h"
19 sysadm 1.19 #include "bbs.h"
20 sysadm 1.1 #include "log.h"
21     #include "database.h"
22 sysadm 1.4 #include "menu.h"
23 sysadm 1.1 #include <stdio.h>
24     #include <string.h>
25     #include <errno.h>
26 sysadm 1.4 #include <signal.h>
27 sysadm 1.1 #include <stdlib.h>
28 sysadm 1.3 #include <strings.h>
29 sysadm 1.4 #include <unistd.h>
30    
31 sysadm 1.8 #define _POSIX_C_SOURCE 200809L
32     #include <string.h>
33    
34 sysadm 1.5 int section_list_loader_pid;
35     int last_article_op_log_mid;
36 sysadm 1.1
37 sysadm 1.2 int load_section_config_from_db(void)
38 sysadm 1.1 {
39 sysadm 1.2 MYSQL *db;
40 sysadm 1.1 MYSQL_RES *rs, *rs2;
41     MYSQL_ROW row, row2;
42     char sql[SQL_BUFFER_LEN];
43     int32_t sid;
44 sysadm 1.8 char master_list[(BBS_username_max_len + 1) * 3 + 1];
45 sysadm 1.1 SECTION_LIST *p_section;
46     int ret;
47    
48 sysadm 1.2 db = db_open();
49     if (db == NULL)
50     {
51     log_error("db_open() error: %s\n", mysql_error(db));
52     return -2;
53     }
54    
55 sysadm 1.1 snprintf(sql, sizeof(sql),
56 sysadm 1.2 "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     "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
59 sysadm 1.1 "ORDER BY section_config.SID");
60    
61     if (mysql_query(db, sql) != 0)
62     {
63     log_error("Query section_list error: %s\n", mysql_error(db));
64 sysadm 1.2 return -3;
65 sysadm 1.1 }
66     if ((rs = mysql_store_result(db)) == NULL)
67     {
68     log_error("Get section_list data failed\n");
69 sysadm 1.2 return -3;
70 sysadm 1.1 }
71 sysadm 1.2
72     ret = 0;
73 sysadm 1.1 while ((row = mysql_fetch_row(rs)))
74     {
75     sid = atoi(row[0]);
76    
77     // Query section master
78     snprintf(sql, sizeof(sql),
79     "SELECT username FROM section_master "
80     "INNER JOIN user_list ON section_master.UID = user_list.UID "
81     "WHERE SID = %d AND section_master.enable AND (NOW() BETWEEN begin_dt AND end_dt) "
82 sysadm 1.8 "ORDER BY major DESC, begin_dt ASC LIMIT 3",
83 sysadm 1.1 sid);
84    
85     if (mysql_query(db, sql) != 0)
86     {
87     log_error("Query section_master error: %s\n", mysql_error(db));
88 sysadm 1.2 ret = -3;
89     break;
90 sysadm 1.1 }
91     if ((rs2 = mysql_store_result(db)) == NULL)
92     {
93     log_error("Get section_master data failed\n");
94 sysadm 1.2 ret = -3;
95     break;
96 sysadm 1.1 }
97 sysadm 1.8
98     master_list[0] = '\0';
99     while ((row2 = mysql_fetch_row(rs2)))
100 sysadm 1.1 {
101 sysadm 1.8 strncat(master_list, row2[0], sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
102     strncat(master_list, " ", sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
103 sysadm 1.1 }
104     mysql_free_result(rs2);
105    
106     p_section = section_list_find_by_sid(sid);
107    
108     if (p_section == NULL)
109     {
110 sysadm 1.8 p_section = section_list_create(sid, row[1], row[2], master_list);
111 sysadm 1.1 if (p_section == NULL)
112     {
113 sysadm 1.2 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
114     ret = -4;
115 sysadm 1.1 break;
116     }
117    
118     // acquire rw lock
119     ret = section_list_rw_lock(p_section);
120     if (ret < 0)
121     {
122     break;
123     }
124     }
125     else
126     {
127     // acquire rw lock
128     ret = section_list_rw_lock(p_section);
129     if (ret < 0)
130     {
131     break;
132     }
133    
134     strncpy(p_section->sname, row[1], sizeof(p_section->sname) - 1);
135     p_section->sname[sizeof(p_section->sname) - 1] = '\0';
136     strncpy(p_section->stitle, row[1], sizeof(p_section->stitle) - 1);
137     p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
138 sysadm 1.8 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
139     p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
140 sysadm 1.1 }
141    
142     p_section->class_id = atoi(row[3]);
143     p_section->read_user_level = atoi(row[4]);
144     p_section->write_user_level = atoi(row[5]);
145     p_section->enable = (int8_t)atoi(row[6]);
146    
147     // release rw lock
148     ret = section_list_rw_unlock(p_section);
149     if (ret < 0)
150     {
151     break;
152     }
153     }
154     mysql_free_result(rs);
155    
156 sysadm 1.2 mysql_close(db);
157    
158     return ret;
159 sysadm 1.1 }
160 sysadm 1.3
161 sysadm 1.9 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
162 sysadm 1.3 {
163     MYSQL *db;
164     MYSQL_RES *rs;
165     MYSQL_ROW row;
166     char sql[SQL_BUFFER_LEN];
167     ARTICLE article;
168 sysadm 1.5 ARTICLE *p_topic;
169 sysadm 1.3 SECTION_LIST *p_section = NULL;
170     int32_t last_sid = 0;
171 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
172 sysadm 1.9 int article_count = 0;
173 sysadm 1.3 int ret = 0;
174     int i;
175    
176     db = db_open();
177     if (db == NULL)
178     {
179     log_error("db_open() error: %s\n", mysql_error(db));
180     return -2;
181     }
182    
183     snprintf(sql, sizeof(sql),
184 sysadm 1.11 "SELECT bbs.AID, TID, SID, bbs.CID, UID, visible, excerption, ontop, `lock`, "
185     "transship, username, nickname, title, UNIX_TIMESTAMP(sub_dt) AS sub_dt, "
186 sysadm 1.16 "sub_ip, bbs_content.content "
187 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
188     "WHERE bbs.AID >= %d ORDER BY bbs.AID LIMIT %d",
189 sysadm 1.9 start_aid, article_count_limit);
190 sysadm 1.3
191     if (mysql_query(db, sql) != 0)
192     {
193     log_error("Query article list error: %s\n", mysql_error(db));
194     return -3;
195     }
196 sysadm 1.11 if ((rs = mysql_use_result(db)) == NULL)
197 sysadm 1.3 {
198     log_error("Get article list data failed\n");
199     return -3;
200     }
201    
202     // acquire global lock
203     if (global_lock)
204     {
205     if ((ret = section_list_rw_lock(NULL)) < 0)
206     {
207     log_error("section_list_rw_lock(sid = 0) error\n");
208     goto cleanup;
209     }
210     }
211    
212     while ((row = mysql_fetch_row(rs)))
213     {
214     bzero(&article, sizeof(ARTICLE));
215    
216     // copy data of article
217     i = 0;
218    
219     article.aid = atoi(row[i++]);
220     article.tid = atoi(row[i++]);
221     article.sid = atoi(row[i++]);
222     article.cid = atoi(row[i++]);
223     article.uid = atoi(row[i++]);
224     article.visible = (int8_t)atoi(row[i++]);
225     article.excerption = (int8_t)atoi(row[i++]);
226     article.ontop = (int8_t)atoi(row[i++]);
227     article.lock = (int8_t)atoi(row[i++]);
228 sysadm 1.5 article.transship = (int8_t)atoi(row[i++]);
229 sysadm 1.3
230     strncpy(article.username, row[i++], sizeof(article.username) - 1);
231     article.username[sizeof(article.username) - 1] = '\0';
232     strncpy(article.nickname, row[i++], sizeof(article.nickname) - 1);
233     article.nickname[sizeof(article.nickname) - 1] = '\0';
234     strncpy(article.title, row[i++], sizeof(article.title) - 1);
235     article.title[sizeof(article.title) - 1] = '\0';
236    
237     article.sub_dt = atol(row[i++]);
238    
239 sysadm 1.16 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
240     sub_ip[sizeof(sub_ip) - 1] = '\0';
241     ip_mask(sub_ip, 1, '*');
242    
243 sysadm 1.3 // release lock of last section if different from current one
244     if (!global_lock && article.sid != last_sid && last_sid != 0)
245     {
246     if ((ret = section_list_rw_unlock(p_section)) < 0)
247     {
248 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
249 sysadm 1.3 break;
250     }
251     }
252    
253     if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
254     {
255     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
256 sysadm 1.4 ret = ERR_UNKNOWN_SECTION; // Unknown section found
257 sysadm 1.3 break;
258     }
259    
260 sysadm 1.5 if (article.visible != 0 && article.tid != 0)
261     {
262     // Check if topic article is visible
263     p_topic = article_block_find_by_aid(article.tid);
264     if (p_topic == NULL || p_topic->visible == 0)
265     {
266     // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
267     article.tid = 0;
268     article.visible = 0;
269     }
270     }
271    
272 sysadm 1.3 // acquire lock of current section if different from last one
273     if (!global_lock && article.sid != last_sid)
274     {
275 sysadm 1.4 if ((ret = section_list_rw_lock(p_section)) < 0)
276 sysadm 1.3 {
277 sysadm 1.11 log_error("section_list_rw_lock(sid=0) error\n");
278 sysadm 1.3 break;
279     }
280     }
281    
282     // append article to section list
283     last_sid = article.sid;
284    
285     if (section_list_append_article(p_section, &article) < 0)
286     {
287 sysadm 1.11 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
288 sysadm 1.3 p_section->sid, article.aid);
289     ret = -3;
290     break;
291     }
292 sysadm 1.9
293     article_count++;
294    
295 sysadm 1.16 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
296 sysadm 1.11 {
297     log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
298     ret = -4;
299     break;
300     }
301 sysadm 1.3 }
302    
303     // release lock of last section
304     if (!global_lock && last_sid != 0)
305     {
306     if ((ret = section_list_rw_unlock(p_section)) < 0)
307     {
308 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
309 sysadm 1.3 }
310     }
311    
312     // release global lock
313     if (global_lock)
314     {
315     if ((ret = section_list_rw_unlock(NULL)) < 0)
316     {
317 sysadm 1.11 log_error("section_list_rw_unlock(sid=0) error\n");
318 sysadm 1.3 }
319     }
320    
321     cleanup:
322     mysql_free_result(rs);
323    
324     mysql_close(db);
325    
326 sysadm 1.9 return (ret < 0 ? ret : article_count);
327 sysadm 1.3 }
328 sysadm 1.4
329 sysadm 1.5 int set_last_article_op_log_from_db(void)
330     {
331     MYSQL *db;
332     MYSQL_RES *rs;
333     MYSQL_ROW row;
334     char sql[SQL_BUFFER_LEN];
335    
336     db = db_open();
337     if (db == NULL)
338     {
339     log_error("db_open() error: %s\n", mysql_error(db));
340     return -1;
341     }
342    
343     snprintf(sql, sizeof(sql),
344     "SELECT MID FROM bbs_article_op ORDER BY MID DESC LIMIT 1");
345    
346     if (mysql_query(db, sql) != 0)
347     {
348     log_error("Query article op error: %s\n", mysql_error(db));
349     return -2;
350     }
351     if ((rs = mysql_store_result(db)) == NULL)
352     {
353     log_error("Get article op data failed\n");
354     return -2;
355     }
356    
357     if ((row = mysql_fetch_row(rs)))
358     {
359     last_article_op_log_mid = atoi(row[0]);
360     }
361    
362     mysql_free_result(rs);
363    
364     mysql_close(db);
365    
366     return last_article_op_log_mid;
367     }
368    
369 sysadm 1.9 int apply_article_op_log_from_db(int op_count_limit)
370 sysadm 1.5 {
371     MYSQL *db;
372     MYSQL_RES *rs, *rs2;
373     MYSQL_ROW row, row2;
374     char sql[SQL_BUFFER_LEN];
375     ARTICLE *p_article;
376     SECTION_LIST *p_section = NULL;
377     SECTION_LIST *p_section_dest;
378 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
379 sysadm 1.5 int32_t last_sid = 0;
380     int32_t sid_dest;
381 sysadm 1.9 int op_count = 0;
382 sysadm 1.5 int ret = 0;
383    
384     db = db_open();
385     if (db == NULL)
386     {
387     log_error("db_open() error: %s\n", mysql_error(db));
388     return -3;
389     }
390    
391     snprintf(sql, sizeof(sql),
392     "SELECT MID, AID, type FROM bbs_article_op "
393 sysadm 1.9 "WHERE MID > %d AND type NOT IN ('A') "
394     "ORDER BY MID LIMIT %d",
395     last_article_op_log_mid, op_count_limit);
396 sysadm 1.5
397     if (mysql_query(db, sql) != 0)
398     {
399     log_error("Query article log error: %s\n", mysql_error(db));
400     return -3;
401     }
402     if ((rs = mysql_store_result(db)) == NULL)
403     {
404     log_error("Get article log data failed\n");
405     return -3;
406     }
407    
408     while ((row = mysql_fetch_row(rs)))
409     {
410     p_article = article_block_find_by_aid(atoi(row[1]));
411     if (p_article == NULL) // related article has not been appended yet
412     {
413     ret = -2;
414     break;
415     }
416    
417     // release lock of last section if different from current one
418     if (p_article->sid != last_sid && last_sid != 0)
419     {
420     if ((ret = section_list_rw_unlock(p_section)) < 0)
421     {
422     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
423     break;
424     }
425     }
426    
427     if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
428     {
429     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
430     ret = ERR_UNKNOWN_SECTION; // Unknown section found
431     break;
432     }
433    
434     // acquire lock of current section if different from last one
435     if (p_article->sid != last_sid)
436     {
437     if ((ret = section_list_rw_lock(p_section)) < 0)
438     {
439     log_error("section_list_rw_lock(sid = 0) error\n");
440     break;
441     }
442     }
443    
444     last_sid = p_article->sid;
445    
446     switch (row[2][0])
447     {
448     case 'A': // Add article
449     log_error("Operation type=A should not be found\n");
450     break;
451     case 'D': // Delete article
452     case 'X': // Delete article by Admin
453 sysadm 1.20 if (section_list_set_article_visible(p_section, atoi(row[1]), 0) < 0)
454 sysadm 1.5 {
455 sysadm 1.20 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=0) error\n", p_section->sid, atoi(row[1]));
456     }
457     if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
458     {
459     log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
460 sysadm 1.5 }
461     break;
462     case 'S': // Restore article
463 sysadm 1.20 if (section_list_set_article_visible(p_section, atoi(row[1]), 1) < 0)
464     {
465     log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=1) error\n", p_section->sid, atoi(row[1]));
466     }
467     if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
468     {
469     log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
470     }
471 sysadm 1.5 break;
472     case 'L': // Lock article
473     p_article->lock = 1;
474     break;
475     case 'U': // Unlock article
476     p_article->lock = 0;
477     break;
478     case 'M': // Modify article
479 sysadm 1.9 snprintf(sql, sizeof(sql),
480 sysadm 1.16 "SELECT bbs.CID, sub_ip, bbs_content.content "
481 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
482     "WHERE bbs.AID = %d",
483 sysadm 1.9 p_article->aid);
484    
485     if (mysql_query(db, sql) != 0)
486     {
487     log_error("Query article error: %s\n", mysql_error(db));
488     ret = -3;
489     break;
490     }
491 sysadm 1.12 if ((rs2 = mysql_use_result(db)) == NULL)
492 sysadm 1.9 {
493     log_error("Get article data failed\n");
494     ret = -3;
495     break;
496     }
497     if ((row2 = mysql_fetch_row(rs2)))
498     {
499     p_article->cid = atoi(row2[0]);
500 sysadm 1.11
501 sysadm 1.16 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
502     sub_ip[sizeof(sub_ip) - 1] = '\0';
503     ip_mask(sub_ip, 1, '*');
504    
505     if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
506 sysadm 1.11 {
507     log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
508     ret = -4;
509     }
510 sysadm 1.9 }
511     else
512     {
513     p_article->cid = 0;
514     ret = -4;
515     }
516     mysql_free_result(rs2);
517 sysadm 1.5 break;
518     case 'T': // Move article
519     snprintf(sql, sizeof(sql),
520     "SELECT SID FROM bbs WHERE AID = %d",
521     p_article->aid);
522    
523     if (mysql_query(db, sql) != 0)
524     {
525     log_error("Query article error: %s\n", mysql_error(db));
526     ret = -3;
527     break;
528     }
529     if ((rs2 = mysql_store_result(db)) == NULL)
530     {
531     log_error("Get article data failed\n");
532     ret = -3;
533     break;
534     }
535     if ((row2 = mysql_fetch_row(rs2)))
536     {
537     sid_dest = atoi(row2[0]);
538     }
539     else
540     {
541     sid_dest = 0;
542     ret = -4;
543     }
544     mysql_free_result(rs2);
545    
546     if (sid_dest > 0 && sid_dest != p_article->sid)
547     {
548     p_section_dest = section_list_find_by_sid(sid_dest);
549     if (p_section_dest == NULL)
550     {
551     ret = ERR_UNKNOWN_SECTION;
552     break;
553     }
554 sysadm 1.6 // acquire lock of dest section
555     if ((ret = section_list_rw_lock(p_section_dest)) < 0)
556     {
557     log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
558     break;
559     }
560 sysadm 1.5 // Move topic
561     if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
562     {
563 sysadm 1.6 log_error("section_list_move_topic(src_sid=%d, dest_sid=%d, aid=%d) error (%d), retry in the next loop\n",
564     p_section->sid, p_section_dest->sid, p_article->aid, ret);
565     }
566     // release lock of dest section
567     if (section_list_rw_unlock(p_section_dest) < 0)
568     {
569     log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
570     ret = -1;
571 sysadm 1.5 }
572     }
573     break;
574     case 'E': // Set article as excerption
575     p_article->excerption = 1;
576     break;
577     case 'O': // Unset article as excerption
578     p_article->excerption = 0;
579     break;
580     case 'F': // Set article on top
581     p_article->ontop = 1;
582     break;
583     case 'V': // Unset article on top
584     p_article->ontop = 0;
585     break;
586     case 'Z': // Set article as trnasship
587     p_article->transship = 1;
588     break;
589     default:
590     // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
591     break;
592     }
593    
594     if (ret < 0)
595     {
596     break;
597     }
598    
599     // Update MID with last successfully proceeded article_op_log
600     last_article_op_log_mid = atoi(row[0]);
601 sysadm 1.9
602     op_count++;
603 sysadm 1.5 }
604    
605     // release lock of last section
606     if (last_sid != 0)
607     {
608     if ((ret = section_list_rw_unlock(p_section)) < 0)
609     {
610     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
611     }
612     }
613    
614     mysql_free_result(rs);
615    
616     mysql_close(db);
617    
618 sysadm 1.9 return (ret < 0 ? ret : op_count);
619 sysadm 1.5 }
620    
621 sysadm 1.4 int section_list_loader_launch(void)
622     {
623     int pid;
624     int ret;
625     int32_t last_aid;
626     int article_count;
627     int load_count;
628 sysadm 1.5 int last_mid;
629 sysadm 1.4 int i;
630    
631     if (section_list_loader_pid != 0)
632     {
633     log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
634     return -2;
635     }
636    
637     pid = fork();
638    
639     if (pid > 0) // Parent process
640     {
641     SYS_child_process_count++;
642     section_list_loader_pid = pid;
643 sysadm 1.18 log_common("Section list loader process (pid = %d) start\n", pid);
644 sysadm 1.4 return 0;
645     }
646     else if (pid < 0) // Error
647     {
648     log_error("fork() error (%d)\n", errno);
649     return -1;
650     }
651    
652     // Child process
653     SYS_child_process_count = 0;
654    
655     // Detach menu in shared memory
656     detach_menu_shm(p_bbs_menu);
657     free(p_bbs_menu);
658     p_bbs_menu = NULL;
659    
660     // Do section data loader periodically
661     while (!SYS_server_exit)
662     {
663     if (SYS_section_list_reload)
664     {
665     SYS_section_list_reload = 0;
666    
667     // Load section config
668     if (load_section_config_from_db() < 0)
669     {
670     log_error("load_section_config_from_db() error\n");
671     }
672     else
673     {
674     log_error("Reload section config successfully\n");
675     }
676     }
677    
678     // Load section articles
679     article_count = article_block_article_count();
680    
681 sysadm 1.9 do
682 sysadm 1.4 {
683 sysadm 1.9 last_aid = article_block_last_aid();
684 sysadm 1.4
685 sysadm 1.9 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
686 sysadm 1.4 {
687 sysadm 1.9 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
688    
689     if (ret == ERR_UNKNOWN_SECTION)
690     {
691     SYS_section_list_reload = 1; // Force reload section_list
692     }
693 sysadm 1.4 }
694 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
695 sysadm 1.5
696     load_count = article_block_article_count() - article_count;
697     if (load_count > 0)
698     {
699 sysadm 1.17 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
700 sysadm 1.5 }
701    
702     if (SYS_section_list_reload)
703     {
704     continue;
705     }
706    
707     // Load article_op log
708     last_mid = last_article_op_log_mid;
709    
710 sysadm 1.9 do
711 sysadm 1.4 {
712 sysadm 1.9 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
713     {
714     log_error("apply_article_op_log_from_db() error\n");
715 sysadm 1.4
716 sysadm 1.9 if (ret == ERR_UNKNOWN_SECTION)
717     {
718     SYS_section_list_reload = 1; // Force reload section_list
719     }
720 sysadm 1.4 }
721 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
722 sysadm 1.4
723 sysadm 1.5 if (last_article_op_log_mid > last_mid)
724     {
725 sysadm 1.17 log_common("Proceeded %d article logs, last_mid = %d\n", last_article_op_log_mid - last_mid, last_article_op_log_mid);
726 sysadm 1.5 }
727    
728     if (SYS_section_list_reload)
729     {
730     continue;
731     }
732    
733 sysadm 1.19 for (i = 0; i < BBS_section_list_load_interval && !SYS_server_exit && !SYS_section_list_reload; i++)
734 sysadm 1.5 {
735     sleep(1);
736 sysadm 1.4 }
737     }
738    
739     // Child process exit
740    
741     // Detach data pools shm
742     detach_section_list_shm();
743     detach_article_block_shm();
744     detach_trie_dict_shm();
745    
746 sysadm 1.17 log_common("Section list loader process exit normally\n");
747 sysadm 1.4 log_end();
748    
749     section_list_loader_pid = 0;
750    
751     _exit(0);
752    
753     return 0;
754     }
755    
756     int section_list_loader_reload(void)
757     {
758     if (section_list_loader_pid == 0)
759     {
760     log_error("section_list_loader not running\n");
761     return -2;
762     }
763    
764     if (kill(section_list_loader_pid, SIGHUP) < 0)
765     {
766     log_error("Send SIGTERM signal failed (%d)\n", errno);
767     return -1;
768     }
769    
770     return 0;
771     }
772 sysadm 1.7
773 sysadm 1.10 int query_section_articles(SECTION_LIST *p_section, int page_id, ARTICLE *p_articles[], int *p_article_count, int *p_page_count)
774 sysadm 1.7 {
775     ARTICLE *p_article;
776     ARTICLE *p_next_page_first_article;
777     int ret = 0;
778    
779 sysadm 1.10 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL)
780 sysadm 1.7 {
781     log_error("query_section_articles() NULL pointer error\n");
782     return -1;
783     }
784    
785     // acquire lock of section
786     if ((ret = section_list_rd_lock(p_section)) < 0)
787     {
788     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
789     return -2;
790     }
791    
792 sysadm 1.10 *p_page_count = p_section->page_count;
793    
794 sysadm 1.9 if (p_section->visible_article_count == 0)
795     {
796     *p_article_count = 0;
797     }
798     else if (page_id < 0 || page_id >= p_section->page_count)
799 sysadm 1.7 {
800 sysadm 1.8 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, p_section->page_count);
801 sysadm 1.7 ret = -3;
802     }
803     else
804     {
805     ret = page_id;
806     p_article = p_section->p_page_first_article[page_id];
807     p_next_page_first_article =
808     (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
809     *p_article_count = 0;
810    
811     do
812     {
813     if (p_article->visible)
814     {
815     p_articles[*p_article_count] = p_article;
816     (*p_article_count)++;
817     }
818     p_article = p_article->p_next;
819     } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
820 sysadm 1.8
821     if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
822     {
823     log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
824     }
825 sysadm 1.7 }
826    
827     // release lock of section
828 sysadm 1.8 if (section_list_rd_unlock(p_section) < 0)
829 sysadm 1.7 {
830     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
831     ret = -2;
832     }
833    
834     return ret;
835     }
836 sysadm 1.14
837     int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction,
838 sysadm 1.15 int *p_page_id, int *p_visible_offset, int *p_article_count)
839 sysadm 1.14 {
840 sysadm 1.15 const ARTICLE *p_article = NULL;
841     ARTICLE *p_tmp;
842 sysadm 1.14 int32_t aid = 0;
843 sysadm 1.15 int page_id;
844     int offset;
845 sysadm 1.14 int ret = 0;
846 sysadm 1.15 int i;
847 sysadm 1.14
848 sysadm 1.15 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
849 sysadm 1.14 {
850     log_error("locate_article_in_section() NULL pointer error\n");
851     return -1;
852     }
853    
854     // acquire lock of section
855     if ((ret = section_list_rd_lock(p_section)) < 0)
856     {
857     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
858     return -2;
859     }
860    
861     if (direction == 0)
862     {
863     aid = p_article_cur->aid;
864     }
865     else if (direction == 1)
866     {
867 sysadm 1.15 p_article = p_article_cur;
868     do
869 sysadm 1.14 {
870 sysadm 1.15 p_article = p_article->p_topic_next;
871     } while (p_article != p_article_cur && p_article->visible == 0);
872    
873     aid = (p_article->aid > p_article_cur->aid ? p_article->aid : 0);
874 sysadm 1.14 }
875     else if (direction == -1)
876     {
877 sysadm 1.15 p_article = p_article_cur;
878     do
879 sysadm 1.14 {
880 sysadm 1.15 p_article = p_article->p_topic_prior;
881     } while (p_article != p_article_cur && p_article->visible == 0);
882    
883     aid = (p_article->aid < p_article_cur->aid ? p_article->aid : 0);
884 sysadm 1.14 }
885    
886 sysadm 1.15 p_article = NULL;
887    
888 sysadm 1.14 if (aid > 0)
889     {
890 sysadm 1.15 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
891 sysadm 1.14 if (p_article != NULL)
892     {
893 sysadm 1.15 *p_article_count = (page_id == p_section->page_count - 1 ? p_section->last_page_visible_article_count : BBS_article_limit_per_page);
894    
895     p_article = p_section->p_page_first_article[page_id];
896     for (i = 0; i < *p_article_count;)
897     {
898     if (p_article->visible)
899     {
900     if (p_article->aid == aid)
901     {
902     *p_page_id = page_id;
903     *p_visible_offset = i;
904     break;
905     }
906     i++;
907     if (i >= *p_article_count)
908     {
909     log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
910     p_article = NULL;
911     }
912     }
913     p_article = p_article->p_next;
914     }
915 sysadm 1.14 }
916     }
917    
918     // release lock of section
919     if (section_list_rd_unlock(p_section) < 0)
920     {
921     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
922     ret = -2;
923     }
924    
925     return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
926     }
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