/[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 1.17 - (hide annotations)
Wed Jun 4 13:42:53 2025 UTC (9 months, 1 week ago) by sysadm
Branch: MAIN
Changes since 1.16: +4 -4 lines
Content type: text/x-csrc 
Rename log_std() to log_common()
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 1.1 #include "log.h"
20     #include "database.h"
21 sysadm 1.4 #include "menu.h"
22 sysadm 1.1 #include <stdio.h>
23     #include <string.h>
24     #include <errno.h>
25 sysadm 1.4 #include <signal.h>
26 sysadm 1.1 #include <stdlib.h>
27 sysadm 1.3 #include <strings.h>
28 sysadm 1.4 #include <unistd.h>
29    
30 sysadm 1.8 #define _POSIX_C_SOURCE 200809L
31     #include <string.h>
32    
33 sysadm 1.4 #define SECTION_LIST_LOAD_INTERVAL 10 // second
34    
35 sysadm 1.5 int section_list_loader_pid;
36     int last_article_op_log_mid;
37 sysadm 1.1
38 sysadm 1.2 int load_section_config_from_db(void)
39 sysadm 1.1 {
40 sysadm 1.2 MYSQL *db;
41 sysadm 1.1 MYSQL_RES *rs, *rs2;
42     MYSQL_ROW row, row2;
43     char sql[SQL_BUFFER_LEN];
44     int32_t sid;
45 sysadm 1.8 char master_list[(BBS_username_max_len + 1) * 3 + 1];
46 sysadm 1.1 SECTION_LIST *p_section;
47     int ret;
48    
49 sysadm 1.2 db = db_open();
50     if (db == NULL)
51     {
52     log_error("db_open() error: %s\n", mysql_error(db));
53     return -2;
54     }
55    
56 sysadm 1.1 snprintf(sql, sizeof(sql),
57 sysadm 1.2 "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     "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
60 sysadm 1.1 "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 sysadm 1.2 return -3;
66 sysadm 1.1 }
67     if ((rs = mysql_store_result(db)) == NULL)
68     {
69     log_error("Get section_list data failed\n");
70 sysadm 1.2 return -3;
71 sysadm 1.1 }
72 sysadm 1.2
73     ret = 0;
74 sysadm 1.1 while ((row = mysql_fetch_row(rs)))
75     {
76     sid = atoi(row[0]);
77    
78     // Query section master
79     snprintf(sql, sizeof(sql),
80     "SELECT username FROM section_master "
81     "INNER JOIN user_list ON section_master.UID = user_list.UID "
82     "WHERE SID = %d AND section_master.enable AND (NOW() BETWEEN begin_dt AND end_dt) "
83 sysadm 1.8 "ORDER BY major DESC, begin_dt ASC LIMIT 3",
84 sysadm 1.1 sid);
85    
86     if (mysql_query(db, sql) != 0)
87     {
88     log_error("Query section_master error: %s\n", mysql_error(db));
89 sysadm 1.2 ret = -3;
90     break;
91 sysadm 1.1 }
92     if ((rs2 = mysql_store_result(db)) == NULL)
93     {
94     log_error("Get section_master data failed\n");
95 sysadm 1.2 ret = -3;
96     break;
97 sysadm 1.1 }
98 sysadm 1.8
99     master_list[0] = '\0';
100     while ((row2 = mysql_fetch_row(rs2)))
101 sysadm 1.1 {
102 sysadm 1.8 strncat(master_list, row2[0], sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
103     strncat(master_list, " ", sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
104 sysadm 1.1 }
105     mysql_free_result(rs2);
106    
107     p_section = section_list_find_by_sid(sid);
108    
109     if (p_section == NULL)
110     {
111 sysadm 1.8 p_section = section_list_create(sid, row[1], row[2], master_list);
112 sysadm 1.1 if (p_section == NULL)
113     {
114 sysadm 1.2 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
115     ret = -4;
116 sysadm 1.1 break;
117     }
118    
119     // acquire rw lock
120     ret = section_list_rw_lock(p_section);
121     if (ret < 0)
122     {
123     break;
124     }
125     }
126     else
127     {
128     // acquire rw lock
129     ret = section_list_rw_lock(p_section);
130     if (ret < 0)
131     {
132     break;
133     }
134    
135     strncpy(p_section->sname, row[1], sizeof(p_section->sname) - 1);
136     p_section->sname[sizeof(p_section->sname) - 1] = '\0';
137     strncpy(p_section->stitle, row[1], sizeof(p_section->stitle) - 1);
138     p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
139 sysadm 1.8 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
140     p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
141 sysadm 1.1 }
142    
143     p_section->class_id = atoi(row[3]);
144     p_section->read_user_level = atoi(row[4]);
145     p_section->write_user_level = atoi(row[5]);
146     p_section->enable = (int8_t)atoi(row[6]);
147    
148     // release rw lock
149     ret = section_list_rw_unlock(p_section);
150     if (ret < 0)
151     {
152     break;
153     }
154     }
155     mysql_free_result(rs);
156    
157 sysadm 1.2 mysql_close(db);
158    
159     return ret;
160 sysadm 1.1 }
161 sysadm 1.3
162 sysadm 1.9 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
163 sysadm 1.3 {
164     MYSQL *db;
165     MYSQL_RES *rs;
166     MYSQL_ROW row;
167     char sql[SQL_BUFFER_LEN];
168     ARTICLE article;
169 sysadm 1.5 ARTICLE *p_topic;
170 sysadm 1.3 SECTION_LIST *p_section = NULL;
171     int32_t last_sid = 0;
172 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
173 sysadm 1.9 int article_count = 0;
174 sysadm 1.3 int ret = 0;
175     int i;
176    
177     db = db_open();
178     if (db == NULL)
179     {
180     log_error("db_open() error: %s\n", mysql_error(db));
181     return -2;
182     }
183    
184     snprintf(sql, sizeof(sql),
185 sysadm 1.11 "SELECT bbs.AID, TID, SID, bbs.CID, UID, visible, excerption, ontop, `lock`, "
186     "transship, username, nickname, title, UNIX_TIMESTAMP(sub_dt) AS sub_dt, "
187 sysadm 1.16 "sub_ip, bbs_content.content "
188 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
189     "WHERE bbs.AID >= %d ORDER BY bbs.AID LIMIT %d",
190 sysadm 1.9 start_aid, article_count_limit);
191 sysadm 1.3
192     if (mysql_query(db, sql) != 0)
193     {
194     log_error("Query article list error: %s\n", mysql_error(db));
195     return -3;
196     }
197 sysadm 1.11 if ((rs = mysql_use_result(db)) == NULL)
198 sysadm 1.3 {
199     log_error("Get article list data failed\n");
200     return -3;
201     }
202    
203     // acquire global lock
204     if (global_lock)
205     {
206     if ((ret = section_list_rw_lock(NULL)) < 0)
207     {
208     log_error("section_list_rw_lock(sid = 0) error\n");
209     goto cleanup;
210     }
211     }
212    
213     while ((row = mysql_fetch_row(rs)))
214     {
215     bzero(&article, sizeof(ARTICLE));
216    
217     // copy data of article
218     i = 0;
219    
220     article.aid = atoi(row[i++]);
221     article.tid = atoi(row[i++]);
222     article.sid = atoi(row[i++]);
223     article.cid = atoi(row[i++]);
224     article.uid = atoi(row[i++]);
225     article.visible = (int8_t)atoi(row[i++]);
226     article.excerption = (int8_t)atoi(row[i++]);
227     article.ontop = (int8_t)atoi(row[i++]);
228     article.lock = (int8_t)atoi(row[i++]);
229 sysadm 1.5 article.transship = (int8_t)atoi(row[i++]);
230 sysadm 1.3
231     strncpy(article.username, row[i++], sizeof(article.username) - 1);
232     article.username[sizeof(article.username) - 1] = '\0';
233     strncpy(article.nickname, row[i++], sizeof(article.nickname) - 1);
234     article.nickname[sizeof(article.nickname) - 1] = '\0';
235     strncpy(article.title, row[i++], sizeof(article.title) - 1);
236     article.title[sizeof(article.title) - 1] = '\0';
237    
238     article.sub_dt = atol(row[i++]);
239    
240 sysadm 1.16 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
241     sub_ip[sizeof(sub_ip) - 1] = '\0';
242     ip_mask(sub_ip, 1, '*');
243    
244 sysadm 1.3 // release lock of last section if different from current one
245     if (!global_lock && article.sid != last_sid && last_sid != 0)
246     {
247     if ((ret = section_list_rw_unlock(p_section)) < 0)
248     {
249 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
250 sysadm 1.3 break;
251     }
252     }
253    
254     if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
255     {
256     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
257 sysadm 1.4 ret = ERR_UNKNOWN_SECTION; // Unknown section found
258 sysadm 1.3 break;
259     }
260    
261 sysadm 1.5 if (article.visible != 0 && article.tid != 0)
262     {
263     // Check if topic article is visible
264     p_topic = article_block_find_by_aid(article.tid);
265     if (p_topic == NULL || p_topic->visible == 0)
266     {
267     // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
268     article.tid = 0;
269     article.visible = 0;
270     }
271     }
272    
273 sysadm 1.3 // acquire lock of current section if different from last one
274     if (!global_lock && article.sid != last_sid)
275     {
276 sysadm 1.4 if ((ret = section_list_rw_lock(p_section)) < 0)
277 sysadm 1.3 {
278 sysadm 1.11 log_error("section_list_rw_lock(sid=0) error\n");
279 sysadm 1.3 break;
280     }
281     }
282    
283     // append article to section list
284     last_sid = article.sid;
285    
286     if (section_list_append_article(p_section, &article) < 0)
287     {
288 sysadm 1.11 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
289 sysadm 1.3 p_section->sid, article.aid);
290     ret = -3;
291     break;
292     }
293 sysadm 1.9
294     article_count++;
295    
296 sysadm 1.16 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
297 sysadm 1.11 {
298     log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
299     ret = -4;
300     break;
301     }
302 sysadm 1.3 }
303    
304     // release lock of last section
305     if (!global_lock && last_sid != 0)
306     {
307     if ((ret = section_list_rw_unlock(p_section)) < 0)
308     {
309 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
310 sysadm 1.3 }
311     }
312    
313     // release global lock
314     if (global_lock)
315     {
316     if ((ret = section_list_rw_unlock(NULL)) < 0)
317     {
318 sysadm 1.11 log_error("section_list_rw_unlock(sid=0) error\n");
319 sysadm 1.3 }
320     }
321    
322     cleanup:
323     mysql_free_result(rs);
324    
325     mysql_close(db);
326    
327 sysadm 1.9 return (ret < 0 ? ret : article_count);
328 sysadm 1.3 }
329 sysadm 1.4
330 sysadm 1.5 int set_last_article_op_log_from_db(void)
331     {
332     MYSQL *db;
333     MYSQL_RES *rs;
334     MYSQL_ROW row;
335     char sql[SQL_BUFFER_LEN];
336    
337     db = db_open();
338     if (db == NULL)
339     {
340     log_error("db_open() error: %s\n", mysql_error(db));
341     return -1;
342     }
343    
344     snprintf(sql, sizeof(sql),
345     "SELECT MID FROM bbs_article_op ORDER BY MID DESC LIMIT 1");
346    
347     if (mysql_query(db, sql) != 0)
348     {
349     log_error("Query article op error: %s\n", mysql_error(db));
350     return -2;
351     }
352     if ((rs = mysql_store_result(db)) == NULL)
353     {
354     log_error("Get article op data failed\n");
355     return -2;
356     }
357    
358     if ((row = mysql_fetch_row(rs)))
359     {
360     last_article_op_log_mid = atoi(row[0]);
361     }
362    
363     mysql_free_result(rs);
364    
365     mysql_close(db);
366    
367     return last_article_op_log_mid;
368     }
369    
370 sysadm 1.9 int apply_article_op_log_from_db(int op_count_limit)
371 sysadm 1.5 {
372     MYSQL *db;
373     MYSQL_RES *rs, *rs2;
374     MYSQL_ROW row, row2;
375     char sql[SQL_BUFFER_LEN];
376     ARTICLE *p_article;
377     SECTION_LIST *p_section = NULL;
378     SECTION_LIST *p_section_dest;
379 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
380 sysadm 1.5 int32_t last_sid = 0;
381     int32_t sid_dest;
382 sysadm 1.9 int op_count = 0;
383 sysadm 1.5 int ret = 0;
384    
385     db = db_open();
386     if (db == NULL)
387     {
388     log_error("db_open() error: %s\n", mysql_error(db));
389     return -3;
390     }
391    
392     snprintf(sql, sizeof(sql),
393     "SELECT MID, AID, type FROM bbs_article_op "
394 sysadm 1.9 "WHERE MID > %d AND type NOT IN ('A') "
395     "ORDER BY MID LIMIT %d",
396     last_article_op_log_mid, op_count_limit);
397 sysadm 1.5
398     if (mysql_query(db, sql) != 0)
399     {
400     log_error("Query article log error: %s\n", mysql_error(db));
401     return -3;
402     }
403     if ((rs = mysql_store_result(db)) == NULL)
404     {
405     log_error("Get article log data failed\n");
406     return -3;
407     }
408    
409     while ((row = mysql_fetch_row(rs)))
410     {
411     p_article = article_block_find_by_aid(atoi(row[1]));
412     if (p_article == NULL) // related article has not been appended yet
413     {
414     ret = -2;
415     break;
416     }
417    
418     // release lock of last section if different from current one
419     if (p_article->sid != last_sid && last_sid != 0)
420     {
421     if ((ret = section_list_rw_unlock(p_section)) < 0)
422     {
423     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
424     break;
425     }
426     }
427    
428     if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
429     {
430     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
431     ret = ERR_UNKNOWN_SECTION; // Unknown section found
432     break;
433     }
434    
435     // acquire lock of current section if different from last one
436     if (p_article->sid != last_sid)
437     {
438     if ((ret = section_list_rw_lock(p_section)) < 0)
439     {
440     log_error("section_list_rw_lock(sid = 0) error\n");
441     break;
442     }
443     }
444    
445     last_sid = p_article->sid;
446    
447     switch (row[2][0])
448     {
449     case 'A': // Add article
450     log_error("Operation type=A should not be found\n");
451     break;
452     case 'D': // Delete article
453     case 'X': // Delete article by Admin
454     p_article->visible = 0;
455     if (p_article->tid == 0)
456     {
457     // Set articles in the topic to be invisible
458     do
459     {
460     p_article = p_article->p_topic_next;
461     p_article->visible = 0;
462     } while (p_article->tid != 0);
463     }
464     break;
465     case 'S': // Restore article
466     p_article->visible = 1;
467     break;
468     case 'L': // Lock article
469     p_article->lock = 1;
470     break;
471     case 'U': // Unlock article
472     p_article->lock = 0;
473     break;
474     case 'M': // Modify article
475 sysadm 1.9 snprintf(sql, sizeof(sql),
476 sysadm 1.16 "SELECT bbs.CID, sub_ip, bbs_content.content "
477 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
478     "WHERE bbs.AID = %d",
479 sysadm 1.9 p_article->aid);
480    
481     if (mysql_query(db, sql) != 0)
482     {
483     log_error("Query article error: %s\n", mysql_error(db));
484     ret = -3;
485     break;
486     }
487 sysadm 1.12 if ((rs2 = mysql_use_result(db)) == NULL)
488 sysadm 1.9 {
489     log_error("Get article data failed\n");
490     ret = -3;
491     break;
492     }
493     if ((row2 = mysql_fetch_row(rs2)))
494     {
495     p_article->cid = atoi(row2[0]);
496 sysadm 1.11
497 sysadm 1.16 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
498     sub_ip[sizeof(sub_ip) - 1] = '\0';
499     ip_mask(sub_ip, 1, '*');
500    
501     if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
502 sysadm 1.11 {
503     log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
504     ret = -4;
505     }
506 sysadm 1.9 }
507     else
508     {
509     p_article->cid = 0;
510     ret = -4;
511     }
512     mysql_free_result(rs2);
513 sysadm 1.5 break;
514     case 'T': // Move article
515     snprintf(sql, sizeof(sql),
516     "SELECT SID FROM bbs WHERE AID = %d",
517     p_article->aid);
518    
519     if (mysql_query(db, sql) != 0)
520     {
521     log_error("Query article error: %s\n", mysql_error(db));
522     ret = -3;
523     break;
524     }
525     if ((rs2 = mysql_store_result(db)) == NULL)
526     {
527     log_error("Get article data failed\n");
528     ret = -3;
529     break;
530     }
531     if ((row2 = mysql_fetch_row(rs2)))
532     {
533     sid_dest = atoi(row2[0]);
534     }
535     else
536     {
537     sid_dest = 0;
538     ret = -4;
539     }
540     mysql_free_result(rs2);
541    
542     if (sid_dest > 0 && sid_dest != p_article->sid)
543     {
544     p_section_dest = section_list_find_by_sid(sid_dest);
545     if (p_section_dest == NULL)
546     {
547     ret = ERR_UNKNOWN_SECTION;
548     break;
549     }
550 sysadm 1.6 // acquire lock of dest section
551     if ((ret = section_list_rw_lock(p_section_dest)) < 0)
552     {
553     log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
554     break;
555     }
556 sysadm 1.5 // Move topic
557     if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
558     {
559 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",
560     p_section->sid, p_section_dest->sid, p_article->aid, ret);
561     }
562     // release lock of dest section
563     if (section_list_rw_unlock(p_section_dest) < 0)
564     {
565     log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
566     ret = -1;
567 sysadm 1.5 }
568     }
569     break;
570     case 'E': // Set article as excerption
571     p_article->excerption = 1;
572     break;
573     case 'O': // Unset article as excerption
574     p_article->excerption = 0;
575     break;
576     case 'F': // Set article on top
577     p_article->ontop = 1;
578     break;
579     case 'V': // Unset article on top
580     p_article->ontop = 0;
581     break;
582     case 'Z': // Set article as trnasship
583     p_article->transship = 1;
584     break;
585     default:
586     // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
587     break;
588     }
589    
590     if (ret < 0)
591     {
592     break;
593     }
594    
595     // Update MID with last successfully proceeded article_op_log
596     last_article_op_log_mid = atoi(row[0]);
597 sysadm 1.9
598     op_count++;
599 sysadm 1.5 }
600    
601     // release lock of last section
602     if (last_sid != 0)
603     {
604     if ((ret = section_list_rw_unlock(p_section)) < 0)
605     {
606     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
607     }
608     }
609    
610     mysql_free_result(rs);
611    
612     mysql_close(db);
613    
614 sysadm 1.9 return (ret < 0 ? ret : op_count);
615 sysadm 1.5 }
616    
617 sysadm 1.4 int section_list_loader_launch(void)
618     {
619     int pid;
620     int ret;
621     int32_t last_aid;
622     int article_count;
623     int load_count;
624 sysadm 1.5 int last_mid;
625 sysadm 1.4 int i;
626    
627     if (section_list_loader_pid != 0)
628     {
629     log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
630     return -2;
631     }
632    
633     pid = fork();
634    
635     if (pid > 0) // Parent process
636     {
637     SYS_child_process_count++;
638     section_list_loader_pid = pid;
639 sysadm 1.17 log_common("Section list loader process (%d) start\n", pid);
640 sysadm 1.4 return 0;
641     }
642     else if (pid < 0) // Error
643     {
644     log_error("fork() error (%d)\n", errno);
645     return -1;
646     }
647    
648     // Child process
649     SYS_child_process_count = 0;
650    
651     // Detach menu in shared memory
652     detach_menu_shm(p_bbs_menu);
653     free(p_bbs_menu);
654     p_bbs_menu = NULL;
655    
656     // Do section data loader periodically
657     while (!SYS_server_exit)
658     {
659     if (SYS_section_list_reload)
660     {
661     SYS_section_list_reload = 0;
662    
663     // Load section config
664     if (load_section_config_from_db() < 0)
665     {
666     log_error("load_section_config_from_db() error\n");
667     }
668     else
669     {
670     log_error("Reload section config successfully\n");
671     }
672     }
673    
674     // Load section articles
675     article_count = article_block_article_count();
676    
677 sysadm 1.9 do
678 sysadm 1.4 {
679 sysadm 1.9 last_aid = article_block_last_aid();
680 sysadm 1.4
681 sysadm 1.9 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
682 sysadm 1.4 {
683 sysadm 1.9 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
684    
685     if (ret == ERR_UNKNOWN_SECTION)
686     {
687     SYS_section_list_reload = 1; // Force reload section_list
688     }
689 sysadm 1.4 }
690 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
691 sysadm 1.5
692     load_count = article_block_article_count() - article_count;
693     if (load_count > 0)
694     {
695 sysadm 1.17 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
696 sysadm 1.5 }
697    
698     if (SYS_section_list_reload)
699     {
700     continue;
701     }
702    
703     // Load article_op log
704     last_mid = last_article_op_log_mid;
705    
706 sysadm 1.9 do
707 sysadm 1.4 {
708 sysadm 1.9 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
709     {
710     log_error("apply_article_op_log_from_db() error\n");
711 sysadm 1.4
712 sysadm 1.9 if (ret == ERR_UNKNOWN_SECTION)
713     {
714     SYS_section_list_reload = 1; // Force reload section_list
715     }
716 sysadm 1.4 }
717 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
718 sysadm 1.4
719 sysadm 1.5 if (last_article_op_log_mid > last_mid)
720     {
721 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);
722 sysadm 1.5 }
723    
724     if (SYS_section_list_reload)
725     {
726     continue;
727     }
728    
729     for (i = 0; i < SECTION_LIST_LOAD_INTERVAL && !SYS_server_exit && !SYS_section_list_reload; i++)
730     {
731     sleep(1);
732 sysadm 1.4 }
733     }
734    
735     // Child process exit
736    
737     // Detach data pools shm
738     detach_section_list_shm();
739     detach_article_block_shm();
740     detach_trie_dict_shm();
741    
742 sysadm 1.17 log_common("Section list loader process exit normally\n");
743 sysadm 1.4 log_end();
744    
745     section_list_loader_pid = 0;
746    
747     _exit(0);
748    
749     return 0;
750     }
751    
752     int section_list_loader_reload(void)
753     {
754     if (section_list_loader_pid == 0)
755     {
756     log_error("section_list_loader not running\n");
757     return -2;
758     }
759    
760     if (kill(section_list_loader_pid, SIGHUP) < 0)
761     {
762     log_error("Send SIGTERM signal failed (%d)\n", errno);
763     return -1;
764     }
765    
766     return 0;
767     }
768 sysadm 1.7
769 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)
770 sysadm 1.7 {
771     ARTICLE *p_article;
772     ARTICLE *p_next_page_first_article;
773     int ret = 0;
774    
775 sysadm 1.10 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL)
776 sysadm 1.7 {
777     log_error("query_section_articles() NULL pointer error\n");
778     return -1;
779     }
780    
781     // acquire lock of section
782     if ((ret = section_list_rd_lock(p_section)) < 0)
783     {
784     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
785     return -2;
786     }
787    
788 sysadm 1.10 *p_page_count = p_section->page_count;
789    
790 sysadm 1.9 if (p_section->visible_article_count == 0)
791     {
792     *p_article_count = 0;
793     }
794     else if (page_id < 0 || page_id >= p_section->page_count)
795 sysadm 1.7 {
796 sysadm 1.8 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, p_section->page_count);
797 sysadm 1.7 ret = -3;
798     }
799     else
800     {
801     ret = page_id;
802     p_article = p_section->p_page_first_article[page_id];
803     p_next_page_first_article =
804     (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
805     *p_article_count = 0;
806    
807     do
808     {
809     if (p_article->visible)
810     {
811     p_articles[*p_article_count] = p_article;
812     (*p_article_count)++;
813     }
814     p_article = p_article->p_next;
815     } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
816 sysadm 1.8
817     if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
818     {
819     log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
820     }
821 sysadm 1.7 }
822    
823     // release lock of section
824 sysadm 1.8 if (section_list_rd_unlock(p_section) < 0)
825 sysadm 1.7 {
826     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
827     ret = -2;
828     }
829    
830     return ret;
831     }
832 sysadm 1.14
833     int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction,
834 sysadm 1.15 int *p_page_id, int *p_visible_offset, int *p_article_count)
835 sysadm 1.14 {
836 sysadm 1.15 const ARTICLE *p_article = NULL;
837     ARTICLE *p_tmp;
838 sysadm 1.14 int32_t aid = 0;
839 sysadm 1.15 int page_id;
840     int offset;
841 sysadm 1.14 int ret = 0;
842 sysadm 1.15 int i;
843 sysadm 1.14
844 sysadm 1.15 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
845 sysadm 1.14 {
846     log_error("locate_article_in_section() NULL pointer error\n");
847     return -1;
848     }
849    
850     // acquire lock of section
851     if ((ret = section_list_rd_lock(p_section)) < 0)
852     {
853     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
854     return -2;
855     }
856    
857     if (direction == 0)
858     {
859     aid = p_article_cur->aid;
860     }
861     else if (direction == 1)
862     {
863 sysadm 1.15 p_article = p_article_cur;
864     do
865 sysadm 1.14 {
866 sysadm 1.15 p_article = p_article->p_topic_next;
867     } while (p_article != p_article_cur && p_article->visible == 0);
868    
869     aid = (p_article->aid > p_article_cur->aid ? p_article->aid : 0);
870 sysadm 1.14 }
871     else if (direction == -1)
872     {
873 sysadm 1.15 p_article = p_article_cur;
874     do
875 sysadm 1.14 {
876 sysadm 1.15 p_article = p_article->p_topic_prior;
877     } while (p_article != p_article_cur && p_article->visible == 0);
878    
879     aid = (p_article->aid < p_article_cur->aid ? p_article->aid : 0);
880 sysadm 1.14 }
881    
882 sysadm 1.15 p_article = NULL;
883    
884 sysadm 1.14 if (aid > 0)
885     {
886 sysadm 1.15 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
887 sysadm 1.14 if (p_article != NULL)
888     {
889 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);
890    
891     p_article = p_section->p_page_first_article[page_id];
892     for (i = 0; i < *p_article_count;)
893     {
894     if (p_article->visible)
895     {
896     if (p_article->aid == aid)
897     {
898     *p_page_id = page_id;
899     *p_visible_offset = i;
900     break;
901     }
902     i++;
903     if (i >= *p_article_count)
904     {
905     log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
906     p_article = NULL;
907     }
908     }
909     p_article = p_article->p_next;
910     }
911 sysadm 1.14 }
912     }
913    
914     // release lock of section
915     if (section_list_rd_unlock(p_section) < 0)
916     {
917     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
918     ret = -2;
919     }
920    
921     return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
922     }
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