/[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 1.26 - (hide annotations)
Tue Jun 17 13:18:55 2025 UTC (8 months, 4 weeks ago) by sysadm
Branch: MAIN
Changes since 1.25: +0 -2 lines
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Move macro definitions to autoconf
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 1.22 #include <string.h>
29 sysadm 1.3 #include <strings.h>
30 sysadm 1.4 #include <unistd.h>
31    
32 sysadm 1.5 int section_list_loader_pid;
33     int last_article_op_log_mid;
34 sysadm 1.1
35 sysadm 1.2 int load_section_config_from_db(void)
36 sysadm 1.1 {
37 sysadm 1.23 MYSQL *db = NULL;
38     MYSQL_RES *rs = NULL, *rs2 = NULL;
39 sysadm 1.1 MYSQL_ROW row, row2;
40     char sql[SQL_BUFFER_LEN];
41     int32_t sid;
42 sysadm 1.8 char master_list[(BBS_username_max_len + 1) * 3 + 1];
43 sysadm 1.1 SECTION_LIST *p_section;
44 sysadm 1.23 int ret = 0;
45 sysadm 1.1
46 sysadm 1.2 db = db_open();
47     if (db == NULL)
48     {
49     log_error("db_open() error: %s\n", mysql_error(db));
50 sysadm 1.23 ret = -1;
51     goto cleanup;
52 sysadm 1.2 }
53    
54 sysadm 1.1 snprintf(sql, sizeof(sql),
55 sysadm 1.2 "SELECT section_config.SID, sname, section_config.title, section_config.CID, "
56     "read_user_level, write_user_level, section_config.enable * section_class.enable AS enable "
57     "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
58 sysadm 1.1 "ORDER BY section_config.SID");
59    
60     if (mysql_query(db, sql) != 0)
61     {
62     log_error("Query section_list error: %s\n", mysql_error(db));
63 sysadm 1.23 ret = -2;
64     goto cleanup;
65 sysadm 1.1 }
66     if ((rs = mysql_store_result(db)) == NULL)
67     {
68     log_error("Get section_list data failed\n");
69 sysadm 1.23 ret = -2;
70     goto cleanup;
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 sysadm 1.23 rs2 = NULL;
107 sysadm 1.1
108     p_section = section_list_find_by_sid(sid);
109    
110     if (p_section == NULL)
111     {
112 sysadm 1.8 p_section = section_list_create(sid, row[1], row[2], master_list);
113 sysadm 1.1 if (p_section == NULL)
114     {
115 sysadm 1.2 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
116     ret = -4;
117 sysadm 1.1 break;
118     }
119    
120     // acquire rw lock
121     ret = section_list_rw_lock(p_section);
122     if (ret < 0)
123     {
124     break;
125     }
126     }
127     else
128     {
129     // acquire rw lock
130     ret = section_list_rw_lock(p_section);
131     if (ret < 0)
132     {
133     break;
134     }
135    
136     strncpy(p_section->sname, row[1], sizeof(p_section->sname) - 1);
137     p_section->sname[sizeof(p_section->sname) - 1] = '\0';
138     strncpy(p_section->stitle, row[1], sizeof(p_section->stitle) - 1);
139     p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
140 sysadm 1.8 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
141     p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
142 sysadm 1.1 }
143    
144     p_section->class_id = atoi(row[3]);
145     p_section->read_user_level = atoi(row[4]);
146     p_section->write_user_level = atoi(row[5]);
147     p_section->enable = (int8_t)atoi(row[6]);
148    
149     // release rw lock
150     ret = section_list_rw_unlock(p_section);
151     if (ret < 0)
152     {
153     break;
154     }
155     }
156 sysadm 1.23
157     cleanup:
158 sysadm 1.1 mysql_free_result(rs);
159 sysadm 1.2 mysql_close(db);
160    
161     return ret;
162 sysadm 1.1 }
163 sysadm 1.3
164 sysadm 1.9 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
165 sysadm 1.3 {
166 sysadm 1.23 MYSQL *db = NULL;
167     MYSQL_RES *rs = NULL;
168 sysadm 1.3 MYSQL_ROW row;
169     char sql[SQL_BUFFER_LEN];
170     ARTICLE article;
171 sysadm 1.5 ARTICLE *p_topic;
172 sysadm 1.3 SECTION_LIST *p_section = NULL;
173     int32_t last_sid = 0;
174 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
175 sysadm 1.9 int article_count = 0;
176 sysadm 1.3 int ret = 0;
177     int i;
178    
179     db = db_open();
180     if (db == NULL)
181     {
182     log_error("db_open() error: %s\n", mysql_error(db));
183 sysadm 1.23 ret = -1;
184     goto cleanup;
185 sysadm 1.3 }
186    
187     snprintf(sql, sizeof(sql),
188 sysadm 1.11 "SELECT bbs.AID, TID, SID, bbs.CID, UID, visible, excerption, ontop, `lock`, "
189     "transship, username, nickname, title, UNIX_TIMESTAMP(sub_dt) AS sub_dt, "
190 sysadm 1.16 "sub_ip, bbs_content.content "
191 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
192     "WHERE bbs.AID >= %d ORDER BY bbs.AID LIMIT %d",
193 sysadm 1.9 start_aid, article_count_limit);
194 sysadm 1.3
195     if (mysql_query(db, sql) != 0)
196     {
197     log_error("Query article list error: %s\n", mysql_error(db));
198 sysadm 1.23 ret = -2;
199     goto cleanup;
200 sysadm 1.3 }
201 sysadm 1.11 if ((rs = mysql_use_result(db)) == NULL)
202 sysadm 1.3 {
203     log_error("Get article list data failed\n");
204 sysadm 1.23 ret = -2;
205     goto cleanup;
206 sysadm 1.3 }
207    
208     // acquire global lock
209 sysadm 1.23 if (global_lock && (ret = section_list_rw_lock(NULL)) < 0)
210 sysadm 1.3 {
211 sysadm 1.23 log_error("section_list_rw_lock(sid = 0) error\n");
212     goto cleanup;
213 sysadm 1.3 }
214    
215     while ((row = mysql_fetch_row(rs)))
216     {
217 sysadm 1.22 memset(&article, 0, sizeof(ARTICLE));
218 sysadm 1.3
219     // copy data of article
220     i = 0;
221    
222     article.aid = atoi(row[i++]);
223     article.tid = atoi(row[i++]);
224     article.sid = atoi(row[i++]);
225     article.cid = atoi(row[i++]);
226     article.uid = atoi(row[i++]);
227     article.visible = (int8_t)atoi(row[i++]);
228     article.excerption = (int8_t)atoi(row[i++]);
229     article.ontop = (int8_t)atoi(row[i++]);
230     article.lock = (int8_t)atoi(row[i++]);
231 sysadm 1.5 article.transship = (int8_t)atoi(row[i++]);
232 sysadm 1.3
233     strncpy(article.username, row[i++], sizeof(article.username) - 1);
234     article.username[sizeof(article.username) - 1] = '\0';
235     strncpy(article.nickname, row[i++], sizeof(article.nickname) - 1);
236     article.nickname[sizeof(article.nickname) - 1] = '\0';
237     strncpy(article.title, row[i++], sizeof(article.title) - 1);
238     article.title[sizeof(article.title) - 1] = '\0';
239    
240     article.sub_dt = atol(row[i++]);
241    
242 sysadm 1.16 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
243     sub_ip[sizeof(sub_ip) - 1] = '\0';
244     ip_mask(sub_ip, 1, '*');
245    
246 sysadm 1.3 // release lock of last section if different from current one
247     if (!global_lock && article.sid != last_sid && last_sid != 0)
248     {
249     if ((ret = section_list_rw_unlock(p_section)) < 0)
250     {
251 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
252 sysadm 1.3 break;
253     }
254     }
255    
256     if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
257     {
258     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
259 sysadm 1.4 ret = ERR_UNKNOWN_SECTION; // Unknown section found
260 sysadm 1.3 break;
261     }
262    
263 sysadm 1.5 if (article.visible != 0 && article.tid != 0)
264     {
265     // Check if topic article is visible
266     p_topic = article_block_find_by_aid(article.tid);
267     if (p_topic == NULL || p_topic->visible == 0)
268     {
269     // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
270     article.tid = 0;
271     article.visible = 0;
272     }
273     }
274    
275 sysadm 1.3 // acquire lock of current section if different from last one
276     if (!global_lock && article.sid != last_sid)
277     {
278 sysadm 1.4 if ((ret = section_list_rw_lock(p_section)) < 0)
279 sysadm 1.3 {
280 sysadm 1.11 log_error("section_list_rw_lock(sid=0) error\n");
281 sysadm 1.3 break;
282     }
283     }
284    
285     // append article to section list
286     last_sid = article.sid;
287    
288     if (section_list_append_article(p_section, &article) < 0)
289     {
290 sysadm 1.11 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
291 sysadm 1.3 p_section->sid, article.aid);
292     ret = -3;
293     break;
294     }
295 sysadm 1.9
296     article_count++;
297    
298 sysadm 1.16 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
299 sysadm 1.11 {
300     log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
301     ret = -4;
302     break;
303     }
304 sysadm 1.3 }
305    
306     // release lock of last section
307     if (!global_lock && last_sid != 0)
308     {
309     if ((ret = section_list_rw_unlock(p_section)) < 0)
310     {
311 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
312 sysadm 1.3 }
313     }
314    
315     // release global lock
316 sysadm 1.23 if (global_lock && (ret = section_list_rw_unlock(NULL)) < 0)
317 sysadm 1.3 {
318 sysadm 1.23 log_error("section_list_rw_unlock(sid=0) error\n");
319 sysadm 1.3 }
320    
321     cleanup:
322     mysql_free_result(rs);
323     mysql_close(db);
324    
325 sysadm 1.9 return (ret < 0 ? ret : article_count);
326 sysadm 1.3 }
327 sysadm 1.4
328 sysadm 1.5 int set_last_article_op_log_from_db(void)
329     {
330 sysadm 1.23 MYSQL *db = NULL;
331     MYSQL_RES *rs = NULL;
332 sysadm 1.5 MYSQL_ROW row;
333     char sql[SQL_BUFFER_LEN];
334 sysadm 1.23 int ret = 0;
335 sysadm 1.5
336     db = db_open();
337     if (db == NULL)
338     {
339     log_error("db_open() error: %s\n", mysql_error(db));
340 sysadm 1.23 ret = -1;
341     goto cleanup;
342 sysadm 1.5 }
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 sysadm 1.23 ret = -2;
351     goto cleanup;
352 sysadm 1.5 }
353     if ((rs = mysql_store_result(db)) == NULL)
354     {
355     log_error("Get article op data failed\n");
356 sysadm 1.23 ret = -2;
357     goto cleanup;
358 sysadm 1.5 }
359    
360     if ((row = mysql_fetch_row(rs)))
361     {
362     last_article_op_log_mid = atoi(row[0]);
363     }
364    
365 sysadm 1.23 cleanup:
366 sysadm 1.5 mysql_free_result(rs);
367     mysql_close(db);
368    
369 sysadm 1.23 return (ret < 0 ? ret : last_article_op_log_mid);
370 sysadm 1.5 }
371    
372 sysadm 1.9 int apply_article_op_log_from_db(int op_count_limit)
373 sysadm 1.5 {
374 sysadm 1.23 MYSQL *db = NULL;
375     MYSQL_RES *rs = NULL, *rs2 = NULL;
376 sysadm 1.5 MYSQL_ROW row, row2;
377     char sql[SQL_BUFFER_LEN];
378     ARTICLE *p_article;
379     SECTION_LIST *p_section = NULL;
380     SECTION_LIST *p_section_dest;
381 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
382 sysadm 1.5 int32_t last_sid = 0;
383     int32_t sid_dest;
384 sysadm 1.9 int op_count = 0;
385 sysadm 1.5 int ret = 0;
386    
387     db = db_open();
388     if (db == NULL)
389     {
390     log_error("db_open() error: %s\n", mysql_error(db));
391 sysadm 1.23 ret = -1;
392     goto cleanup;
393 sysadm 1.5 }
394    
395     snprintf(sql, sizeof(sql),
396     "SELECT MID, AID, type FROM bbs_article_op "
397 sysadm 1.9 "WHERE MID > %d AND type NOT IN ('A') "
398     "ORDER BY MID LIMIT %d",
399     last_article_op_log_mid, op_count_limit);
400 sysadm 1.5
401     if (mysql_query(db, sql) != 0)
402     {
403     log_error("Query article log error: %s\n", mysql_error(db));
404 sysadm 1.23 ret = -2;
405     goto cleanup;
406 sysadm 1.5 }
407     if ((rs = mysql_store_result(db)) == NULL)
408     {
409     log_error("Get article log data failed\n");
410 sysadm 1.23 ret = -2;
411     goto cleanup;
412 sysadm 1.5 }
413    
414     while ((row = mysql_fetch_row(rs)))
415     {
416     p_article = article_block_find_by_aid(atoi(row[1]));
417     if (p_article == NULL) // related article has not been appended yet
418     {
419     ret = -2;
420     break;
421     }
422    
423     // release lock of last section if different from current one
424     if (p_article->sid != last_sid && last_sid != 0)
425     {
426     if ((ret = section_list_rw_unlock(p_section)) < 0)
427     {
428     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
429     break;
430     }
431     }
432    
433     if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
434     {
435     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
436     ret = ERR_UNKNOWN_SECTION; // Unknown section found
437     break;
438     }
439    
440     // acquire lock of current section if different from last one
441     if (p_article->sid != last_sid)
442     {
443     if ((ret = section_list_rw_lock(p_section)) < 0)
444     {
445     log_error("section_list_rw_lock(sid = 0) error\n");
446     break;
447     }
448     }
449    
450     last_sid = p_article->sid;
451    
452     switch (row[2][0])
453     {
454     case 'A': // Add article
455     log_error("Operation type=A should not be found\n");
456     break;
457     case 'D': // Delete article
458     case 'X': // Delete article by Admin
459 sysadm 1.20 if (section_list_set_article_visible(p_section, atoi(row[1]), 0) < 0)
460 sysadm 1.5 {
461 sysadm 1.20 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=0) error\n", p_section->sid, atoi(row[1]));
462     }
463     if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
464     {
465     log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
466 sysadm 1.5 }
467     break;
468     case 'S': // Restore article
469 sysadm 1.20 if (section_list_set_article_visible(p_section, atoi(row[1]), 1) < 0)
470     {
471     log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=1) error\n", p_section->sid, atoi(row[1]));
472     }
473     if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
474     {
475     log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
476     }
477 sysadm 1.5 break;
478     case 'L': // Lock article
479     p_article->lock = 1;
480     break;
481     case 'U': // Unlock article
482     p_article->lock = 0;
483     break;
484     case 'M': // Modify article
485 sysadm 1.9 snprintf(sql, sizeof(sql),
486 sysadm 1.16 "SELECT bbs.CID, sub_ip, bbs_content.content "
487 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
488     "WHERE bbs.AID = %d",
489 sysadm 1.9 p_article->aid);
490    
491     if (mysql_query(db, sql) != 0)
492     {
493     log_error("Query article error: %s\n", mysql_error(db));
494     ret = -3;
495     break;
496     }
497 sysadm 1.12 if ((rs2 = mysql_use_result(db)) == NULL)
498 sysadm 1.9 {
499     log_error("Get article data failed\n");
500     ret = -3;
501     break;
502     }
503     if ((row2 = mysql_fetch_row(rs2)))
504     {
505     p_article->cid = atoi(row2[0]);
506 sysadm 1.11
507 sysadm 1.16 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
508     sub_ip[sizeof(sub_ip) - 1] = '\0';
509     ip_mask(sub_ip, 1, '*');
510    
511     if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
512 sysadm 1.11 {
513     log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
514     ret = -4;
515     }
516 sysadm 1.9 }
517     else
518     {
519     p_article->cid = 0;
520     ret = -4;
521     }
522     mysql_free_result(rs2);
523 sysadm 1.23 rs2 = NULL;
524 sysadm 1.21
525     p_article->excerption = 0; // Set excerption = 0 implicitly in case of rare condition
526 sysadm 1.5 break;
527     case 'T': // Move article
528     snprintf(sql, sizeof(sql),
529     "SELECT SID FROM bbs WHERE AID = %d",
530     p_article->aid);
531    
532     if (mysql_query(db, sql) != 0)
533     {
534     log_error("Query article error: %s\n", mysql_error(db));
535     ret = -3;
536     break;
537     }
538     if ((rs2 = mysql_store_result(db)) == NULL)
539     {
540     log_error("Get article data failed\n");
541     ret = -3;
542     break;
543     }
544     if ((row2 = mysql_fetch_row(rs2)))
545     {
546     sid_dest = atoi(row2[0]);
547     }
548     else
549     {
550     sid_dest = 0;
551     ret = -4;
552     }
553     mysql_free_result(rs2);
554 sysadm 1.23 rs2 = NULL;
555 sysadm 1.5
556     if (sid_dest > 0 && sid_dest != p_article->sid)
557     {
558     p_section_dest = section_list_find_by_sid(sid_dest);
559     if (p_section_dest == NULL)
560     {
561     ret = ERR_UNKNOWN_SECTION;
562     break;
563     }
564 sysadm 1.6 // acquire lock of dest section
565     if ((ret = section_list_rw_lock(p_section_dest)) < 0)
566     {
567     log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
568     break;
569     }
570 sysadm 1.5 // Move topic
571     if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
572     {
573 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",
574     p_section->sid, p_section_dest->sid, p_article->aid, ret);
575     }
576     // release lock of dest section
577     if (section_list_rw_unlock(p_section_dest) < 0)
578     {
579     log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
580     ret = -1;
581 sysadm 1.5 }
582     }
583     break;
584     case 'E': // Set article as excerption
585     p_article->excerption = 1;
586     break;
587     case 'O': // Unset article as excerption
588     p_article->excerption = 0;
589     break;
590     case 'F': // Set article on top
591     p_article->ontop = 1;
592     break;
593     case 'V': // Unset article on top
594     p_article->ontop = 0;
595     break;
596     case 'Z': // Set article as trnasship
597     p_article->transship = 1;
598     break;
599     default:
600     // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
601     break;
602     }
603    
604     if (ret < 0)
605     {
606     break;
607     }
608    
609     // Update MID with last successfully proceeded article_op_log
610     last_article_op_log_mid = atoi(row[0]);
611 sysadm 1.9
612     op_count++;
613 sysadm 1.5 }
614    
615     // release lock of last section
616     if (last_sid != 0)
617     {
618     if ((ret = section_list_rw_unlock(p_section)) < 0)
619     {
620     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
621     }
622     }
623    
624 sysadm 1.23 cleanup:
625     mysql_free_result(rs2);
626 sysadm 1.5 mysql_free_result(rs);
627     mysql_close(db);
628    
629 sysadm 1.9 return (ret < 0 ? ret : op_count);
630 sysadm 1.5 }
631    
632 sysadm 1.4 int section_list_loader_launch(void)
633     {
634     int pid;
635     int ret;
636     int32_t last_aid;
637     int article_count;
638     int load_count;
639 sysadm 1.5 int last_mid;
640 sysadm 1.4 int i;
641    
642     if (section_list_loader_pid != 0)
643     {
644     log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
645     return -2;
646     }
647    
648     pid = fork();
649    
650     if (pid > 0) // Parent process
651     {
652     SYS_child_process_count++;
653     section_list_loader_pid = pid;
654 sysadm 1.18 log_common("Section list loader process (pid = %d) start\n", pid);
655 sysadm 1.4 return 0;
656     }
657     else if (pid < 0) // Error
658     {
659     log_error("fork() error (%d)\n", errno);
660     return -1;
661     }
662    
663     // Child process
664     SYS_child_process_count = 0;
665    
666     // Detach menu in shared memory
667     detach_menu_shm(p_bbs_menu);
668     free(p_bbs_menu);
669     p_bbs_menu = NULL;
670    
671     // Do section data loader periodically
672     while (!SYS_server_exit)
673     {
674     if (SYS_section_list_reload)
675     {
676     SYS_section_list_reload = 0;
677    
678     // Load section config
679     if (load_section_config_from_db() < 0)
680     {
681     log_error("load_section_config_from_db() error\n");
682     }
683     else
684     {
685     log_error("Reload section config successfully\n");
686     }
687     }
688    
689     // Load section articles
690     article_count = article_block_article_count();
691    
692 sysadm 1.9 do
693 sysadm 1.4 {
694 sysadm 1.9 last_aid = article_block_last_aid();
695 sysadm 1.4
696 sysadm 1.9 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
697 sysadm 1.4 {
698 sysadm 1.9 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
699    
700     if (ret == ERR_UNKNOWN_SECTION)
701     {
702     SYS_section_list_reload = 1; // Force reload section_list
703     }
704 sysadm 1.4 }
705 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
706 sysadm 1.5
707     load_count = article_block_article_count() - article_count;
708     if (load_count > 0)
709     {
710 sysadm 1.17 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
711 sysadm 1.5 }
712    
713     if (SYS_section_list_reload)
714     {
715     continue;
716     }
717    
718     // Load article_op log
719     last_mid = last_article_op_log_mid;
720    
721 sysadm 1.9 do
722 sysadm 1.4 {
723 sysadm 1.9 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
724     {
725     log_error("apply_article_op_log_from_db() error\n");
726 sysadm 1.4
727 sysadm 1.9 if (ret == ERR_UNKNOWN_SECTION)
728     {
729     SYS_section_list_reload = 1; // Force reload section_list
730     }
731 sysadm 1.4 }
732 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
733 sysadm 1.4
734 sysadm 1.5 if (last_article_op_log_mid > last_mid)
735     {
736 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);
737 sysadm 1.5 }
738    
739     if (SYS_section_list_reload)
740     {
741     continue;
742     }
743    
744 sysadm 1.19 for (i = 0; i < BBS_section_list_load_interval && !SYS_server_exit && !SYS_section_list_reload; i++)
745 sysadm 1.5 {
746     sleep(1);
747 sysadm 1.4 }
748     }
749    
750     // Child process exit
751    
752     // Detach data pools shm
753     detach_section_list_shm();
754     detach_article_block_shm();
755     detach_trie_dict_shm();
756    
757 sysadm 1.17 log_common("Section list loader process exit normally\n");
758 sysadm 1.4 log_end();
759    
760     section_list_loader_pid = 0;
761    
762     _exit(0);
763    
764     return 0;
765     }
766    
767     int section_list_loader_reload(void)
768     {
769     if (section_list_loader_pid == 0)
770     {
771     log_error("section_list_loader not running\n");
772     return -2;
773     }
774    
775     if (kill(section_list_loader_pid, SIGHUP) < 0)
776     {
777     log_error("Send SIGTERM signal failed (%d)\n", errno);
778     return -1;
779     }
780    
781     return 0;
782     }
783 sysadm 1.7
784 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)
785 sysadm 1.7 {
786     ARTICLE *p_article;
787     ARTICLE *p_next_page_first_article;
788     int ret = 0;
789    
790 sysadm 1.10 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL)
791 sysadm 1.7 {
792     log_error("query_section_articles() NULL pointer error\n");
793     return -1;
794     }
795    
796     // acquire lock of section
797     if ((ret = section_list_rd_lock(p_section)) < 0)
798     {
799     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
800     return -2;
801     }
802    
803 sysadm 1.10 *p_page_count = p_section->page_count;
804    
805 sysadm 1.9 if (p_section->visible_article_count == 0)
806     {
807     *p_article_count = 0;
808     }
809     else if (page_id < 0 || page_id >= p_section->page_count)
810 sysadm 1.7 {
811 sysadm 1.8 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, p_section->page_count);
812 sysadm 1.7 ret = -3;
813     }
814     else
815     {
816     ret = page_id;
817     p_article = p_section->p_page_first_article[page_id];
818     p_next_page_first_article =
819     (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
820     *p_article_count = 0;
821    
822     do
823     {
824     if (p_article->visible)
825     {
826     p_articles[*p_article_count] = p_article;
827     (*p_article_count)++;
828     }
829     p_article = p_article->p_next;
830     } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
831 sysadm 1.8
832     if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
833     {
834     log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
835     }
836 sysadm 1.7 }
837    
838     // release lock of section
839 sysadm 1.8 if (section_list_rd_unlock(p_section) < 0)
840 sysadm 1.7 {
841     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
842     ret = -2;
843     }
844    
845     return ret;
846     }
847 sysadm 1.14
848 sysadm 1.24 int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction, int step,
849 sysadm 1.15 int *p_page_id, int *p_visible_offset, int *p_article_count)
850 sysadm 1.14 {
851 sysadm 1.15 const ARTICLE *p_article = NULL;
852     ARTICLE *p_tmp;
853 sysadm 1.14 int32_t aid = 0;
854 sysadm 1.24 int page_id = 0;
855     int offset = 0;
856 sysadm 1.14 int ret = 0;
857 sysadm 1.15 int i;
858 sysadm 1.14
859 sysadm 1.15 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
860 sysadm 1.14 {
861     log_error("locate_article_in_section() NULL pointer error\n");
862     return -1;
863     }
864    
865     // acquire lock of section
866     if ((ret = section_list_rd_lock(p_section)) < 0)
867     {
868     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
869     return -2;
870     }
871    
872     if (direction == 0)
873     {
874     aid = p_article_cur->aid;
875     }
876     else if (direction == 1)
877     {
878 sysadm 1.24 for (p_article = p_article_cur; step > 0 && p_article->p_topic_next->aid > p_article_cur->aid; p_article = p_article->p_topic_next)
879 sysadm 1.14 {
880 sysadm 1.24 if (p_article->visible)
881     {
882     step--;
883     }
884     }
885 sysadm 1.15
886 sysadm 1.25 aid = (p_article->aid > p_article_cur->aid && p_article->visible ? p_article->aid : 0);
887 sysadm 1.14 }
888     else if (direction == -1)
889     {
890 sysadm 1.24 for (p_article = p_article_cur; step > 0 && p_article->p_topic_prior->aid < p_article_cur->aid; p_article = p_article->p_topic_prior)
891 sysadm 1.14 {
892 sysadm 1.24 if (p_article->visible)
893     {
894     step--;
895     }
896     }
897 sysadm 1.15
898 sysadm 1.25 aid = (p_article->aid < p_article_cur->aid && p_article->visible ? p_article->aid : 0);
899 sysadm 1.14 }
900    
901 sysadm 1.15 p_article = NULL;
902    
903 sysadm 1.14 if (aid > 0)
904     {
905 sysadm 1.15 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
906 sysadm 1.14 if (p_article != NULL)
907     {
908 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);
909    
910     p_article = p_section->p_page_first_article[page_id];
911 sysadm 1.25 for (i = 0; i < *p_article_count && p_article != NULL;)
912 sysadm 1.15 {
913     if (p_article->visible)
914     {
915     if (p_article->aid == aid)
916     {
917     *p_page_id = page_id;
918     *p_visible_offset = i;
919     break;
920     }
921     i++;
922     if (i >= *p_article_count)
923     {
924     log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
925     p_article = NULL;
926 sysadm 1.25 break;
927 sysadm 1.15 }
928     }
929     p_article = p_article->p_next;
930     }
931 sysadm 1.14 }
932     }
933    
934     // release lock of section
935     if (section_list_rd_unlock(p_section) < 0)
936     {
937     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
938     ret = -2;
939     }
940    
941     return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
942     }
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