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a3698041 AC |
1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006, Adam Chlipala | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
dac62e84 | 17 | *) |
a3698041 AC |
18 | |
19 | (* Domain-related primitive actions *) | |
20 | ||
21 | structure Domain :> DOMAIN = struct | |
22 | ||
2ed6d0e5 | 23 | structure SM = DataStructures.StringMap |
12adf55a | 24 | structure SS = DataStructures.StringSet |
2ed6d0e5 | 25 | |
12adf55a | 26 | val nodes = map #1 Config.nodeIps |
2ed6d0e5 AC |
27 | val nodeMap = foldl (fn ((node, ip), mp) => SM.insert (mp, node, ip)) |
28 | SM.empty Config.nodeIps | |
8a7c40fa | 29 | fun nodeIp node = valOf (SM.find (nodeMap, node)) |
2ed6d0e5 | 30 | |
12adf55a AC |
31 | val usr = ref "" |
32 | fun setUser ur = usr := ur | |
33 | fun getUser () = !usr | |
34 | ||
35 | val your_doms = ref SS.empty | |
36 | fun your_domains () = !your_doms | |
37 | ||
8a7c40fa AC |
38 | val your_usrs = ref SS.empty |
39 | fun your_users () = !your_usrs | |
40 | ||
41 | val your_grps = ref SS.empty | |
42 | fun your_groups () = !your_grps | |
43 | ||
44 | val your_pths = ref SS.empty | |
45 | fun your_paths () = !your_pths | |
46 | ||
6ae327f8 AC |
47 | fun validIp s = |
48 | case map Int.fromString (String.fields (fn ch => ch = #".") s) of | |
49 | [SOME n1, SOME n2, SOME n3, SOME n4] => | |
50 | n1 >= 0 andalso n1 < 256 andalso n2 >= 0 andalso n2 < 256 andalso n3 >= 0 andalso n3 < 256 andalso n4 >= 0 andalso n4 < 256 | |
51 | | _ => false | |
52 | ||
629a34f6 AC |
53 | fun isIdent ch = Char.isLower ch orelse Char.isDigit ch |
54 | ||
55 | fun validHost s = | |
56 | size s > 0 andalso size s < 20 | |
57 | andalso CharVector.all (fn ch => isIdent ch orelse ch = #"-") s | |
58 | ||
59 | fun validDomain s = | |
60 | size s > 0 andalso size s < 100 | |
61 | andalso List.all validHost (String.fields (fn ch => ch = #".") s) | |
62 | ||
2ed6d0e5 | 63 | fun validNode s = List.exists (fn s' => s = s') nodes |
e0b0abd2 | 64 | |
12adf55a | 65 | fun yourDomain s = SS.member (your_domains (), s) |
8a7c40fa AC |
66 | fun yourUser s = SS.member (your_users (), s) |
67 | fun yourGroup s = SS.member (your_groups (), s) | |
68 | fun yourPath path = | |
69 | List.all (fn s => s <> "..") (String.fields (fn ch => ch = #"/") path) | |
70 | andalso CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"/" | |
71 | orelse ch = #"-" orelse ch = #"_") path | |
72 | andalso SS.exists (fn s' => path = s' orelse String.isPrefix (s' ^ "/") path) (your_paths ()) | |
12adf55a | 73 | |
f8dfbbcc AC |
74 | val _ = Env.type_one "no_spaces" |
75 | Env.string | |
76 | (CharVector.all (fn ch => not (Char.isSpace ch))) | |
d5754b53 AC |
77 | val _ = Env.type_one "no_newlines" |
78 | Env.string | |
79 | (CharVector.all (fn ch => ch <> #"\n" andalso ch <> #"\r")) | |
f8dfbbcc | 80 | |
6ae327f8 AC |
81 | val _ = Env.type_one "ip" |
82 | Env.string | |
83 | validIp | |
84 | ||
629a34f6 AC |
85 | val _ = Env.type_one "host" |
86 | Env.string | |
87 | validHost | |
88 | ||
89 | val _ = Env.type_one "domain" | |
90 | Env.string | |
91 | validDomain | |
92 | ||
12adf55a AC |
93 | val _ = Env.type_one "your_domain" |
94 | Env.string | |
95 | yourDomain | |
96 | ||
8a7c40fa AC |
97 | val _ = Env.type_one "your_user" |
98 | Env.string | |
99 | yourUser | |
100 | ||
101 | val _ = Env.type_one "your_group" | |
102 | Env.string | |
103 | yourGroup | |
104 | ||
105 | val _ = Env.type_one "your_path" | |
106 | Env.string | |
107 | yourPath | |
108 | ||
e0b0abd2 AC |
109 | val _ = Env.type_one "node" |
110 | Env.string | |
111 | validNode | |
112 | ||
a3698041 AC |
113 | open Ast |
114 | ||
6ae327f8 AC |
115 | val dl = ErrorMsg.dummyLoc |
116 | ||
117 | val nsD = (EString Config.defaultNs, dl) | |
118 | val serialD = (EVar "serialAuto", dl) | |
119 | val refD = (EInt Config.defaultRefresh, dl) | |
120 | val retD = (EInt Config.defaultRetry, dl) | |
121 | val expD = (EInt Config.defaultExpiry, dl) | |
122 | val minD = (EInt Config.defaultMinimum, dl) | |
123 | ||
124 | val soaD = multiApp ((EVar "soa", dl), | |
125 | dl, | |
126 | [nsD, serialD, refD, retD, expD, minD]) | |
127 | ||
e0b0abd2 AC |
128 | val masterD = (EApp ((EVar "internalMaster", dl), |
129 | (EString Config.defaultNode, dl)), | |
130 | dl) | |
131 | ||
6ae327f8 AC |
132 | val _ = Main.registerDefault ("DNS", |
133 | (TBase "dnsKind", dl), | |
8a7c40fa | 134 | (fn () => multiApp ((EVar "useDns", dl), |
e0b0abd2 AC |
135 | dl, |
136 | [soaD, masterD, (EList [], dl)]))) | |
6ae327f8 AC |
137 | |
138 | val _ = Main.registerDefault ("TTL", | |
139 | (TBase "int", dl), | |
8a7c40fa | 140 | (fn () => (EInt Config.Bind.defaultTTL, dl))) |
6ae327f8 AC |
141 | |
142 | type soa = {ns : string, | |
143 | serial : int option, | |
144 | ref : int, | |
145 | ret : int, | |
146 | exp : int, | |
147 | min : int} | |
148 | ||
149 | val serial = fn (EVar "serialAuto", _) => SOME NONE | |
150 | | (EApp ((EVar "serialConst", _), n), _) => Option.map SOME (Env.int n) | |
151 | | _ => NONE | |
152 | ||
153 | val soa = fn (EApp ((EApp ((EApp ((EApp ((EApp ((EApp | |
154 | ((EVar "soa", _), ns), _), | |
155 | sl), _), | |
156 | rf), _), | |
157 | ret), _), | |
158 | exp), _), | |
159 | min), _) => | |
160 | (case (Env.string ns, serial sl, Env.int rf, | |
161 | Env.int ret, Env.int exp, Env.int min) of | |
162 | (SOME ns, SOME sl, SOME rf, | |
163 | SOME ret, SOME exp, SOME min) => | |
164 | SOME {ns = ns, | |
165 | serial = sl, | |
166 | ref = rf, | |
167 | ret = ret, | |
168 | exp = exp, | |
169 | min = min} | |
170 | | _ => NONE) | |
171 | | _ => NONE | |
172 | ||
e0b0abd2 AC |
173 | datatype master = |
174 | ExternalMaster of string | |
175 | | InternalMaster of string | |
176 | ||
177 | val master = fn (EApp ((EVar "externalMaster", _), e), _) => Option.map ExternalMaster (Env.string e) | |
178 | | (EApp ((EVar "internalMaster", _), e), _) => Option.map InternalMaster (Env.string e) | |
179 | | _ => NONE | |
180 | ||
6ae327f8 | 181 | datatype dnsKind = |
e0b0abd2 AC |
182 | UseDns of {soa : soa, |
183 | master : master, | |
184 | slaves : string list} | |
6ae327f8 AC |
185 | | NoDns |
186 | ||
e0b0abd2 AC |
187 | val dnsKind = fn (EApp ((EApp ((EApp |
188 | ((EVar "useDns", _), sa), _), | |
189 | mstr), _), | |
190 | slaves), _) => | |
191 | (case (soa sa, master mstr, Env.list Env.string slaves) of | |
192 | (SOME sa, SOME mstr, SOME slaves) => | |
193 | SOME (UseDns {soa = sa, | |
194 | master = mstr, | |
195 | slaves = slaves}) | |
196 | | _ => NONE) | |
6ae327f8 AC |
197 | | _ => NONE |
198 | ||
a3698041 AC |
199 | val befores = ref (fn (_ : string) => ()) |
200 | val afters = ref (fn (_ : string) => ()) | |
201 | ||
202 | fun registerBefore f = | |
203 | let | |
204 | val old = !befores | |
205 | in | |
206 | befores := (fn x => (old x; f x)) | |
207 | end | |
208 | ||
209 | fun registerAfter f = | |
210 | let | |
211 | val old = !afters | |
212 | in | |
213 | afters := (fn x => (old x; f x)) | |
214 | end | |
215 | ||
216 | val current = ref "" | |
e0b0abd2 | 217 | val currentPath = ref (fn (_ : string) => "") |
dac62e84 | 218 | |
d612d62c AC |
219 | val scratch = ref "" |
220 | ||
dac62e84 AC |
221 | fun currentDomain () = !current |
222 | ||
e0b0abd2 AC |
223 | fun domainFile {node, name} = ((*print ("Opening " ^ !currentPath node ^ name ^ "\n");*) |
224 | TextIO.openOut (!currentPath node ^ name)) | |
dac62e84 AC |
225 | |
226 | fun getPath domain = | |
227 | let | |
228 | val toks = String.fields (fn ch => ch = #".") domain | |
229 | ||
230 | val elems = foldr (fn (piece, elems) => | |
231 | let | |
232 | val elems = piece :: elems | |
d612d62c | 233 | |
e0b0abd2 AC |
234 | fun doNode node = |
235 | let | |
236 | val path = String.concatWith "/" | |
237 | (Config.resultRoot :: node :: rev elems) | |
238 | val tmpPath = String.concatWith "/" | |
239 | (Config.tmpDir :: node :: rev elems) | |
240 | in | |
241 | (if Posix.FileSys.ST.isDir | |
242 | (Posix.FileSys.stat path) then | |
243 | () | |
244 | else | |
245 | (OS.FileSys.remove path; | |
246 | OS.FileSys.mkDir path)) | |
247 | handle OS.SysErr _ => OS.FileSys.mkDir path; | |
248 | ||
249 | (if Posix.FileSys.ST.isDir | |
250 | (Posix.FileSys.stat tmpPath) then | |
251 | () | |
252 | else | |
253 | (OS.FileSys.remove tmpPath; | |
254 | OS.FileSys.mkDir tmpPath)) | |
255 | handle OS.SysErr _ => OS.FileSys.mkDir tmpPath | |
256 | end | |
257 | in | |
2ed6d0e5 | 258 | app doNode nodes; |
dac62e84 AC |
259 | elems |
260 | end) [] toks | |
261 | in | |
e0b0abd2 | 262 | fn (root, site) => String.concatWith "/" (root :: site :: rev ("" :: elems)) |
d612d62c AC |
263 | end |
264 | ||
265 | datatype file_action' = | |
266 | Add' of {src : string, dst : string} | |
267 | | Delete' of string | |
268 | | Modify' of {src : string, dst : string} | |
269 | ||
e0b0abd2 | 270 | fun findDiffs (site, dom, acts) = |
d612d62c | 271 | let |
e0b0abd2 AC |
272 | val gp = getPath dom |
273 | val realPath = gp (Config.resultRoot, site) | |
274 | val tmpPath = gp (Config.tmpDir, site) | |
275 | ||
276 | (*val _ = print ("getDiffs(" ^ site ^ ", " ^ dom ^ ")... " ^ realPath ^ "; " ^ tmpPath ^ "\n")*) | |
d612d62c AC |
277 | |
278 | val dir = Posix.FileSys.opendir realPath | |
279 | ||
280 | fun loopReal acts = | |
281 | case Posix.FileSys.readdir dir of | |
282 | NONE => (Posix.FileSys.closedir dir; | |
283 | acts) | |
284 | | SOME fname => | |
285 | let | |
286 | val real = OS.Path.joinDirFile {dir = realPath, | |
287 | file = fname} | |
288 | val tmp = OS.Path.joinDirFile {dir = tmpPath, | |
289 | file = fname} | |
290 | in | |
291 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat real) then | |
292 | loopReal acts | |
293 | else if Posix.FileSys.access (tmp, []) then | |
8df2e702 | 294 | if Slave.shell [Config.diff, " ", real, " ", tmp] then |
d612d62c AC |
295 | loopReal acts |
296 | else | |
e0b0abd2 | 297 | loopReal ((site, dom, realPath, Modify' {src = tmp, dst = real}) :: acts) |
d612d62c | 298 | else |
e0b0abd2 | 299 | loopReal ((site, dom, realPath, Delete' real) :: acts) |
d612d62c AC |
300 | end |
301 | ||
e0b0abd2 | 302 | val acts = loopReal acts |
d612d62c | 303 | |
8df2e702 | 304 | val dir = Posix.FileSys.opendir tmpPath |
d612d62c AC |
305 | |
306 | fun loopTmp acts = | |
307 | case Posix.FileSys.readdir dir of | |
308 | NONE => (Posix.FileSys.closedir dir; | |
309 | acts) | |
310 | | SOME fname => | |
311 | let | |
312 | val real = OS.Path.joinDirFile {dir = realPath, | |
313 | file = fname} | |
314 | val tmp = OS.Path.joinDirFile {dir = tmpPath, | |
315 | file = fname} | |
316 | in | |
317 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat tmp) then | |
318 | loopTmp acts | |
319 | else if Posix.FileSys.access (real, []) then | |
320 | loopTmp acts | |
321 | else | |
e0b0abd2 | 322 | loopTmp ((site, dom, realPath, Add' {src = tmp, dst = real}) :: acts) |
d612d62c AC |
323 | end |
324 | ||
325 | val acts = loopTmp acts | |
326 | in | |
327 | acts | |
dac62e84 | 328 | end |
a3698041 | 329 | |
e0b0abd2 AC |
330 | fun findAllDiffs () = |
331 | let | |
332 | val dir = Posix.FileSys.opendir Config.tmpDir | |
333 | val len = length (String.fields (fn ch => ch = #"/") Config.tmpDir) + 1 | |
334 | ||
335 | fun exploreSites diffs = | |
336 | case Posix.FileSys.readdir dir of | |
337 | NONE => diffs | |
338 | | SOME site => | |
339 | let | |
340 | fun explore (dname, diffs) = | |
341 | let | |
342 | val dir = Posix.FileSys.opendir dname | |
343 | ||
344 | fun loop diffs = | |
345 | case Posix.FileSys.readdir dir of | |
346 | NONE => diffs | |
347 | | SOME name => | |
348 | let | |
349 | val fname = OS.Path.joinDirFile {dir = dname, | |
350 | file = name} | |
351 | in | |
352 | loop (if Posix.FileSys.ST.isDir (Posix.FileSys.stat fname) then | |
353 | let | |
354 | val dom = String.fields (fn ch => ch = #"/") fname | |
355 | val dom = List.drop (dom, len) | |
356 | val dom = String.concatWith "." (rev dom) | |
357 | ||
358 | val dname' = OS.Path.joinDirFile {dir = dname, | |
359 | file = name} | |
360 | in | |
361 | explore (dname', | |
362 | findDiffs (site, dom, diffs)) | |
363 | end | |
364 | else | |
365 | diffs) | |
366 | end | |
367 | in | |
368 | loop diffs | |
369 | before Posix.FileSys.closedir dir | |
370 | end | |
371 | in | |
372 | explore (OS.Path.joinDirFile {dir = Config.tmpDir, | |
373 | file = site}, diffs) | |
374 | end | |
375 | in | |
376 | exploreSites [] | |
377 | before Posix.FileSys.closedir dir | |
378 | end | |
379 | ||
380 | val masterNode : string option ref = ref NONE | |
381 | fun dnsMaster () = !masterNode | |
382 | ||
6ae327f8 AC |
383 | val _ = Env.containerV_one "domain" |
384 | ("domain", Env.string) | |
385 | (fn (evs, dom) => | |
386 | let | |
387 | val kind = Env.env dnsKind (evs, "DNS") | |
388 | val ttl = Env.env Env.int (evs, "TTL") | |
389 | ||
e0b0abd2 | 390 | val path = getPath dom |
6ae327f8 AC |
391 | |
392 | val () = (current := dom; | |
e0b0abd2 | 393 | currentPath := (fn site => path (Config.tmpDir, site))) |
6ae327f8 | 394 | |
e0b0abd2 | 395 | fun saveSoa (kind, soa : soa) node = |
6ae327f8 | 396 | let |
e0b0abd2 | 397 | val outf = domainFile {node = node, name = "soa"} |
6ae327f8 AC |
398 | in |
399 | TextIO.output (outf, kind); | |
400 | TextIO.output (outf, "\n"); | |
401 | TextIO.output (outf, Int.toString ttl); | |
402 | TextIO.output (outf, "\n"); | |
403 | TextIO.output (outf, #ns soa); | |
404 | TextIO.output (outf, "\n"); | |
405 | case #serial soa of | |
406 | NONE => () | |
407 | | SOME n => TextIO.output (outf, Int.toString n); | |
408 | TextIO.output (outf, "\n"); | |
409 | TextIO.output (outf, Int.toString (#ref soa)); | |
410 | TextIO.output (outf, "\n"); | |
411 | TextIO.output (outf, Int.toString (#ret soa)); | |
412 | TextIO.output (outf, "\n"); | |
413 | TextIO.output (outf, Int.toString (#exp soa)); | |
414 | TextIO.output (outf, "\n"); | |
415 | TextIO.output (outf, Int.toString (#min soa)); | |
416 | TextIO.output (outf, "\n"); | |
417 | TextIO.closeOut outf | |
418 | end | |
419 | ||
2ed6d0e5 | 420 | fun saveNamed (kind, soa : soa, masterIp) node = |
6ae327f8 | 421 | let |
e0b0abd2 | 422 | val outf = domainFile {node = node, name = "named.conf"} |
6ae327f8 AC |
423 | in |
424 | TextIO.output (outf, "\nzone \""); | |
425 | TextIO.output (outf, dom); | |
426 | TextIO.output (outf, "\" IN {\n\ttype "); | |
427 | TextIO.output (outf, kind); | |
428 | TextIO.output (outf, ";\n\tfile \""); | |
429 | TextIO.output (outf, Config.Bind.zonePath); | |
430 | TextIO.output (outf, "/"); | |
431 | TextIO.output (outf, dom); | |
432 | TextIO.output (outf, ".zone\";\n"); | |
433 | case kind of | |
434 | "master" => TextIO.output (outf, "\tallow-update { none; };\n") | |
2ed6d0e5 AC |
435 | | _ => (TextIO.output (outf, "\tmasters { "); |
436 | TextIO.output (outf, masterIp); | |
437 | TextIO.output (outf, " };\n")); | |
438 | TextIO.output (outf, "};\n"); | |
6ae327f8 AC |
439 | TextIO.closeOut outf |
440 | end | |
6ae327f8 AC |
441 | in |
442 | case kind of | |
e0b0abd2 AC |
443 | NoDns => masterNode := NONE |
444 | | UseDns dns => | |
2ed6d0e5 AC |
445 | let |
446 | val masterIp = | |
447 | case #master dns of | |
448 | InternalMaster node => valOf (SM.find (nodeMap, node)) | |
449 | | ExternalMaster ip => ip | |
450 | in | |
451 | app (saveSoa ("slave", #soa dns)) (#slaves dns); | |
452 | app (saveNamed ("slave", #soa dns, masterIp)) (#slaves dns); | |
453 | case #master dns of | |
454 | InternalMaster node => | |
455 | (masterNode := SOME node; | |
456 | saveSoa ("master", #soa dns) node; | |
457 | saveNamed ("master", #soa dns, masterIp) node) | |
458 | | _ => masterNode := NONE; | |
459 | !befores dom | |
460 | end | |
6ae327f8 | 461 | end, |
e0b0abd2 AC |
462 | fn () => !afters (!current)) |
463 | ||
12adf55a AC |
464 | val () = Env.registerPreTycheck (fn () => (setUser Config.testUser; |
465 | Acl.read Config.aclFile; | |
466 | your_doms := Acl.class {user = getUser (), | |
8a7c40fa AC |
467 | class = "domain"}; |
468 | your_usrs := Acl.class {user = getUser (), | |
469 | class = "user"}; | |
470 | your_grps := Acl.class {user = getUser (), | |
471 | class = "group"}; | |
472 | your_pths := Acl.class {user = getUser (), | |
473 | class = "path"})) | |
12adf55a | 474 | |
e0b0abd2 AC |
475 | val () = Env.registerPre (fn () => (ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""], |
476 | fn cl => "Temp file cleanup failed: " ^ cl)); | |
477 | OS.FileSys.mkDir Config.tmpDir; | |
478 | app (fn node => OS.FileSys.mkDir | |
479 | (OS.Path.joinDirFile {dir = Config.tmpDir, | |
480 | file = node})) | |
2ed6d0e5 | 481 | nodes; |
e0b0abd2 AC |
482 | app (fn node => OS.FileSys.mkDir |
483 | (OS.Path.joinDirFile {dir = Config.resultRoot, | |
484 | file = node}) | |
485 | handle OS.SysErr _ => ()) | |
2ed6d0e5 | 486 | nodes)) |
e0b0abd2 AC |
487 | |
488 | val () = Env.registerPost (fn () => | |
489 | let | |
490 | val diffs = findAllDiffs () | |
6ae327f8 | 491 | |
e0b0abd2 AC |
492 | val diffs = map (fn (site, dom, dir, Add' {src, dst}) => |
493 | (Slave.shellF ([Config.cp, " ", src, " ", dst], | |
494 | fn cl => "Copy failed: " ^ cl); | |
495 | (site, | |
6ae327f8 AC |
496 | {action = Slave.Add, |
497 | domain = dom, | |
498 | dir = dir, | |
e0b0abd2 AC |
499 | file = dst})) |
500 | | (site, dom, dir, Delete' dst) => | |
501 | (OS.FileSys.remove dst | |
502 | handle OS.SysErr _ => | |
503 | ErrorMsg.error NONE ("Delete failed for " ^ dst); | |
504 | (site, | |
6ae327f8 AC |
505 | {action = Slave.Delete, |
506 | domain = dom, | |
507 | dir = dir, | |
e0b0abd2 AC |
508 | file = dst})) |
509 | | (site, dom, dir, Modify' {src, dst}) => | |
510 | (Slave.shellF ([Config.cp, " ", src, " ", dst], | |
511 | fn cl => "Copy failed: " ^ cl); | |
512 | (site, | |
6ae327f8 AC |
513 | {action = Slave.Modify, |
514 | domain = dom, | |
515 | dir = dir, | |
e0b0abd2 AC |
516 | file = dst}))) diffs |
517 | in | |
518 | if !ErrorMsg.anyErrors then | |
519 | () | |
520 | else | |
12adf55a | 521 | Slave.handleChanges (map #2 diffs)(*; |
e0b0abd2 | 522 | ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""], |
12adf55a | 523 | fn cl => "Temp file cleanup failed: " ^ cl))*) |
e0b0abd2 | 524 | end) |
6ae327f8 AC |
525 | |
526 | ||
a3698041 AC |
527 | |
528 | end |