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1 | /* | |
2 | * ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd). | |
3 | * cache.c - code for caching files | |
4 | * | |
5 | * Copyright (C) 2003 Lee Hardy <lee@leeh.co.uk> | |
6 | * Copyright (C) 2003-2005 ircd-ratbox development team | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions are | |
10 | * met: | |
11 | * | |
12 | * 1.Redistributions of source code must retain the above copyright notice, | |
13 | * this list of conditions and the following disclaimer. | |
14 | * 2.Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3.The name of the author may not be used to endorse or promote products | |
18 | * derived from this software without specific prior written permission. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
21 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
22 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
23 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
24 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
26 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
28 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
30 | * POSSIBILITY OF SUCH DAMAGE. | |
31 | * | |
32 | * $Id: cache.c 3436 2007-05-02 19:56:40Z jilles $ | |
33 | */ | |
34 | ||
35 | #include "stdinc.h" | |
36 | #include "ircd_defs.h" | |
37 | #include "common.h" | |
38 | #include "s_conf.h" | |
39 | #include "tools.h" | |
40 | #include "client.h" | |
41 | #include "memory.h" | |
42 | #include "balloc.h" | |
43 | #include "event.h" | |
44 | #include "hash.h" | |
45 | #include "cache.h" | |
46 | #include "sprintf_irc.h" | |
47 | #include "irc_dictionary.h" | |
48 | #include "numeric.h" | |
49 | ||
50 | static BlockHeap *cachefile_heap = NULL; | |
51 | static BlockHeap *cacheline_heap = NULL; | |
52 | ||
53 | struct cachefile *user_motd = NULL; | |
54 | struct cachefile *oper_motd = NULL; | |
55 | char user_motd_changed[MAX_DATE_STRING]; | |
56 | ||
57 | struct Dictionary *help_dict_oper = NULL; | |
58 | struct Dictionary *help_dict_user = NULL; | |
59 | ||
60 | /* init_cache() | |
61 | * | |
62 | * inputs - | |
63 | * outputs - | |
64 | * side effects - inits the file/line cache blockheaps, loads motds | |
65 | */ | |
66 | void | |
67 | init_cache(void) | |
68 | { | |
69 | cachefile_heap = BlockHeapCreate(sizeof(struct cachefile), CACHEFILE_HEAP_SIZE); | |
70 | cacheline_heap = BlockHeapCreate(sizeof(struct cacheline), CACHELINE_HEAP_SIZE); | |
71 | ||
72 | user_motd_changed[0] = '\0'; | |
73 | ||
74 | user_motd = cache_file(MPATH, "ircd.motd", 0); | |
75 | oper_motd = cache_file(OPATH, "opers.motd", 0); | |
76 | ||
77 | help_dict_oper = irc_dictionary_create(strcasecmp); | |
78 | help_dict_user = irc_dictionary_create(strcasecmp); | |
79 | } | |
80 | ||
81 | /* cache_file() | |
82 | * | |
83 | * inputs - file to cache, files "shortname", flags to set | |
84 | * outputs - pointer to file cached, else NULL | |
85 | * side effects - | |
86 | */ | |
87 | struct cachefile * | |
88 | cache_file(const char *filename, const char *shortname, int flags) | |
89 | { | |
90 | FILE *in; | |
91 | struct cachefile *cacheptr; | |
92 | struct cacheline *lineptr; | |
93 | char line[BUFSIZE]; | |
94 | char *p; | |
95 | ||
96 | if((in = fopen(filename, "r")) == NULL) | |
97 | return NULL; | |
98 | ||
99 | if(strcmp(shortname, "ircd.motd") == 0) | |
100 | { | |
101 | struct stat sb; | |
102 | struct tm *local_tm; | |
103 | ||
104 | if(fstat(fileno(in), &sb) < 0) | |
105 | return NULL; | |
106 | ||
107 | local_tm = localtime(&sb.st_mtime); | |
108 | ||
109 | if(local_tm != NULL) | |
110 | rb_snprintf(user_motd_changed, sizeof(user_motd_changed), | |
111 | "%d/%d/%d %d:%d", | |
112 | local_tm->tm_mday, local_tm->tm_mon + 1, | |
113 | 1900 + local_tm->tm_year, local_tm->tm_hour, | |
114 | local_tm->tm_min); | |
115 | } | |
116 | ||
117 | cacheptr = BlockHeapAlloc(cachefile_heap); | |
118 | ||
119 | strlcpy(cacheptr->name, shortname, sizeof(cacheptr->name)); | |
120 | cacheptr->flags = flags; | |
121 | ||
122 | /* cache the file... */ | |
123 | while(fgets(line, sizeof(line), in) != NULL) | |
124 | { | |
125 | if((p = strchr(line, '\n')) != NULL) | |
126 | *p = '\0'; | |
127 | ||
128 | lineptr = BlockHeapAlloc(cacheline_heap); | |
129 | if(EmptyString(line)) | |
130 | strlcpy(lineptr->data, " ", sizeof(lineptr->data)); | |
131 | else | |
132 | strlcpy(lineptr->data, line, sizeof(lineptr->data)); | |
133 | rb_dlinkAddTail(lineptr, &lineptr->linenode, &cacheptr->contents); | |
134 | } | |
135 | ||
136 | fclose(in); | |
137 | return cacheptr; | |
138 | } | |
139 | ||
140 | /* free_cachefile() | |
141 | * | |
142 | * inputs - cachefile to free | |
143 | * outputs - | |
144 | * side effects - cachefile and its data is free'd | |
145 | */ | |
146 | void | |
147 | free_cachefile(struct cachefile *cacheptr) | |
148 | { | |
149 | rb_dlink_node *ptr; | |
150 | rb_dlink_node *next_ptr; | |
151 | ||
152 | if(cacheptr == NULL) | |
153 | return; | |
154 | ||
155 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, cacheptr->contents.head) | |
156 | { | |
157 | BlockHeapFree(cacheline_heap, ptr->data); | |
158 | } | |
159 | ||
160 | BlockHeapFree(cachefile_heap, cacheptr); | |
161 | } | |
162 | ||
163 | /* load_help() | |
164 | * | |
165 | * inputs - | |
166 | * outputs - | |
167 | * side effects - old help cache deleted | |
168 | * - contents of help directories are loaded. | |
169 | */ | |
170 | void | |
171 | load_help(void) | |
172 | { | |
173 | DIR *helpfile_dir = NULL; | |
174 | struct dirent *ldirent= NULL; | |
175 | char filename[MAXPATHLEN]; | |
176 | struct cachefile *cacheptr; | |
177 | struct DictionaryIter iter; | |
178 | ||
179 | DICTIONARY_FOREACH(cacheptr, &iter, help_dict_oper) | |
180 | { | |
181 | irc_dictionary_delete(help_dict_oper, cacheptr->name); | |
182 | free_cachefile(cacheptr); | |
183 | } | |
184 | DICTIONARY_FOREACH(cacheptr, &iter, help_dict_user) | |
185 | { | |
186 | irc_dictionary_delete(help_dict_user, cacheptr->name); | |
187 | free_cachefile(cacheptr); | |
188 | } | |
189 | ||
190 | helpfile_dir = opendir(HPATH); | |
191 | ||
192 | if(helpfile_dir == NULL) | |
193 | return; | |
194 | ||
195 | while((ldirent = readdir(helpfile_dir)) != NULL) | |
196 | { | |
197 | rb_snprintf(filename, sizeof(filename), "%s/%s", HPATH, ldirent->d_name); | |
198 | cacheptr = cache_file(filename, ldirent->d_name, HELP_OPER); | |
199 | irc_dictionary_add(help_dict_oper, cacheptr->name, cacheptr); | |
200 | } | |
201 | ||
202 | closedir(helpfile_dir); | |
203 | helpfile_dir = opendir(UHPATH); | |
204 | ||
205 | if(helpfile_dir == NULL) | |
206 | return; | |
207 | ||
208 | while((ldirent = readdir(helpfile_dir)) != NULL) | |
209 | { | |
210 | rb_snprintf(filename, sizeof(filename), "%s/%s", UHPATH, ldirent->d_name); | |
211 | ||
212 | cacheptr = cache_file(filename, ldirent->d_name, HELP_USER); | |
213 | irc_dictionary_add(help_dict_user, cacheptr->name, cacheptr); | |
214 | } | |
215 | ||
216 | closedir(helpfile_dir); | |
217 | } | |
218 | ||
219 | /* send_user_motd() | |
220 | * | |
221 | * inputs - client to send motd to | |
222 | * outputs - client is sent motd if exists, else ERR_NOMOTD | |
223 | * side effects - | |
224 | */ | |
225 | void | |
226 | send_user_motd(struct Client *source_p) | |
227 | { | |
228 | struct cacheline *lineptr; | |
229 | rb_dlink_node *ptr; | |
230 | const char *myname = get_id(&me, source_p); | |
231 | const char *nick = get_id(source_p, source_p); | |
232 | ||
233 | if(user_motd == NULL || rb_dlink_list_length(&user_motd->contents) == 0) | |
234 | { | |
235 | sendto_one(source_p, form_str(ERR_NOMOTD), myname, nick); | |
236 | return; | |
237 | } | |
238 | ||
239 | sendto_one(source_p, form_str(RPL_MOTDSTART), myname, nick, me.name); | |
240 | ||
241 | RB_DLINK_FOREACH(ptr, user_motd->contents.head) | |
242 | { | |
243 | lineptr = ptr->data; | |
244 | sendto_one(source_p, form_str(RPL_MOTD), myname, nick, lineptr->data); | |
245 | } | |
246 | ||
247 | sendto_one(source_p, form_str(RPL_ENDOFMOTD), myname, nick); | |
248 | } | |
249 | ||
250 | /* send_oper_motd() | |
251 | * | |
252 | * inputs - client to send motd to | |
253 | * outputs - client is sent oper motd if exists | |
254 | * side effects - | |
255 | */ | |
256 | void | |
257 | send_oper_motd(struct Client *source_p) | |
258 | { | |
259 | struct cacheline *lineptr; | |
260 | rb_dlink_node *ptr; | |
261 | ||
262 | if(oper_motd == NULL || rb_dlink_list_length(&oper_motd->contents) == 0) | |
263 | return; | |
264 | ||
265 | sendto_one(source_p, form_str(RPL_OMOTDSTART), | |
266 | me.name, source_p->name); | |
267 | ||
268 | RB_DLINK_FOREACH(ptr, oper_motd->contents.head) | |
269 | { | |
270 | lineptr = ptr->data; | |
271 | sendto_one(source_p, form_str(RPL_OMOTD), | |
272 | me.name, source_p->name, lineptr->data); | |
273 | } | |
274 | ||
275 | sendto_one(source_p, form_str(RPL_ENDOFOMOTD), | |
276 | me.name, source_p->name); | |
277 | } | |
278 |