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1 | #! /usr/bin/tclsh8.5 |
2 | ### -*-tcl-*- | |
3 | ### | |
4 | ### Generate `named.conf' stanze for multiple views. | |
5 | ### | |
6 | ### (c) 2011 Mark Wooding | |
7 | ### | |
8 | ||
9 | ###----- Licensing notice --------------------------------------------------- | |
10 | ### | |
11 | ### This program is free software; you can redistribute it and/or modify | |
12 | ### it under the terms of the GNU General Public License as published by | |
13 | ### the Free Software Foundation; either version 2 of the License, or | |
14 | ### (at your option) any later version. | |
15 | ### | |
16 | ### This program is distributed in the hope that it will be useful, | |
17 | ### but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ### GNU General Public License for more details. | |
20 | ### | |
21 | ### You should have received a copy of the GNU General Public License | |
22 | ### along with this program; if not, write to the Free Software Foundation, | |
23 | ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | ||
25 | ###-------------------------------------------------------------------------- | |
26 | ### Utility functions. | |
27 | ||
28 | proc pushnew {var args} { | |
29 | ## Append each of the ARGS onto the list VAR if they're not there already. | |
30 | ||
31 | upvar 1 $var list | |
32 | foreach item $list { set found($item) t } | |
33 | foreach item $args { | |
34 | if {![info exists found($item)]} { | |
35 | lappend list $item | |
36 | set found($item) t | |
37 | } | |
38 | } | |
39 | } | |
40 | ||
41 | proc merge-lists {lists} { | |
42 | ## Merge the given LISTS into a single list, respecting the order of the | |
43 | ## items in the original list. If that's not possible, signal an error. | |
44 | ## Any ambiguity is resolved by choosing the item from the earlier list. | |
45 | ||
46 | ## Strip out any empty lists in the input. | |
47 | set nlists {} | |
48 | foreach list $lists { | |
49 | if {[llength $list]} { lappend nlists $list } | |
50 | } | |
51 | set lists $nlists | |
52 | ||
53 | ## Clear the output list. | |
54 | set output {} | |
55 | ||
56 | ## Now pick out items one by one. | |
57 | while {[llength $lists]} { | |
58 | ||
59 | ## Find the candidate items | |
60 | set cand {} | |
61 | foreach list $lists { pushnew cand [lindex $list 0] } | |
62 | ||
63 | ## Remove candidate items which have not the first in some other list. | |
64 | set ncand {} | |
65 | foreach cand $cand { | |
66 | foreach list $lists { | |
67 | if {[lsearch -exact $list $cand] < 0} { lappend ncand $cand } | |
68 | } | |
69 | } | |
70 | ||
71 | ## If there's nothing left, report an error. | |
72 | if {![llength $cand]} { | |
73 | error "Inconsistent lists in `merge-lists'." | |
74 | } | |
75 | ||
76 | ## Otherwise take the first item. | |
77 | set chosen [lindex $cand 0] | |
78 | lappend output $chosen | |
79 | ||
80 | ## Remove the chosen item from the input lists. | |
81 | set nlists {} | |
82 | foreach list $lists { | |
83 | if {[string equal $chosen [lindex $list 0]]} { | |
84 | set list [lrange $list 1 end] | |
85 | if {![llength $list]} { continue } | |
86 | } | |
87 | lappend nlists $list | |
88 | } | |
89 | set lists $nlists | |
90 | } | |
91 | ||
92 | return $output | |
93 | } | |
94 | ||
95 | proc adjust-uplevel {spec offset} { | |
96 | ## Adjust an `uplevel' SPEC by OFFSET to take account of intervening call | |
97 | ## frames. If SPEC begins with `#' then it is left alone; otherwise it is | |
98 | ## incremented by OFFSET. | |
99 | ||
100 | switch -glob -- $spec { | |
101 | \#* { return $spec } | |
102 | default { return [expr {$spec + $offset}] } | |
103 | } | |
104 | } | |
105 | ||
106 | proc unwind-protect {body cleanup} { | |
107 | ## Evaluate BODY; then evaluate CLEANUP, regardless of whether BODY | |
108 | ## returned normally or did something complicated. If CLEANUP completes | |
109 | ## normally then the final result is that of BODY (including any errors or | |
110 | ## abnormal returns it made); otherwise the result of CLEANUP takes | |
111 | ## precedence and the results of BODY are discarded. | |
112 | ||
113 | catch { uplevel 1 $body } bodyval bodyopts | |
114 | if {[catch { uplevel 1 $cleanup } cleanval cleanopts]} { | |
115 | return -options $cleanopts $cleanval | |
116 | } else { | |
117 | return -options $bodyopts $bodyval | |
118 | } | |
119 | } | |
120 | ||
121 | proc let {args} { | |
122 | ## Syntax: let VAR VALUE ... BODY | |
123 | ## | |
124 | ## Evaluate BODY with the VARs bound to the VALUEs. Reestore the previous | |
125 | ## values when the BODY returns. | |
126 | ||
127 | ## Parse the argument syntax. | |
128 | if {[llength $args] % 2 == 0} { | |
129 | error "bad number of arguments to `let'" | |
130 | } | |
131 | set body [lindex $args end] | |
132 | ||
133 | ## Now work through the bindings, setting the variables to their new | |
134 | ## values. As we go, also build up code in `cleanup' to restore everything | |
135 | ## the way it's meant to be. | |
136 | set cleanup {} | |
137 | set i 0 | |
138 | foreach {var value} [lrange $args 0 end-1] { | |
139 | upvar 1 $var fluid-$i | |
140 | if {[info exists fluid-$i]} { | |
141 | append cleanup "set fluid-$i [list [set fluid-$i]]\n" | |
142 | } else { | |
143 | append cleanup "unset fluid-$i\n" | |
144 | } | |
145 | set fluid-$i $value | |
146 | incr i | |
147 | } | |
148 | ||
149 | ## Now evaluate the body. | |
150 | unwind-protect { uplevel 1 $body } $cleanup | |
151 | } | |
152 | ||
153 | proc set* {names values} { | |
154 | ## Set each of the variables listed in NAMES to the corresponding element | |
155 | ## of VALUES. The two lists must have the same length. | |
156 | ||
157 | if {[llength $names] != [llength $values]} { | |
158 | error "length mismatch" | |
159 | } | |
160 | foreach name $names value $values { | |
161 | upvar 1 $name var | |
162 | set var $value | |
163 | } | |
164 | } | |
165 | ||
166 | ###-------------------------------------------------------------------------- | |
167 | ### Configuration spaces. | |
168 | ### | |
169 | ### A configuration space is essentially a collection of Tcl commands and a | |
170 | ### global array which the commands act on. The commands live in their own | |
171 | ### namespace and their availability can be altered by modifying the | |
172 | ### namespace path. The basic idea is to support a structured configuration | |
173 | ### language with short directive names and where the available directives | |
174 | ### varies in a context-sensitive manner. | |
175 | ### | |
176 | ### A configuration space can include other spaces, and they can include | |
177 | ### further spaces. The graph of inclusions must be acyclic; further, since | |
178 | ### the available commands are determined using the C3 linearization | |
179 | ### algorithm, the relation in which a space precedes the spaces it includes, | |
180 | ### and a space A precedes another space B if a third space includes A before | |
181 | ### B, must be a partial order, and the linearizations of all of the spaces | |
182 | ### must be monotonic. Don't worry about that if you don't know what it | |
183 | ### means. If you don't do anything weird, it'll probably be all right. | |
184 | ||
185 | proc confspc-create {space confvar} { | |
186 | ## Define a new configuration space called SPACE. You must do this before | |
187 | ## defining directives or including other spaces. | |
188 | ||
189 | global CONFSPC_CMD CONFSPC_INCL CONFSPC_CPL CONFSPC_CHANGE CONFSPC_VAR | |
190 | if {![info exists CONFSPC_CMD($space)]} { | |
191 | set CONFSPC_CMD($space) {} | |
192 | set CONFSPC_INCL($space) {} | |
193 | set CONFSPC_CPL($space) [list $space] | |
194 | set CONFSPC_CHANGE($space) 0 | |
195 | set CONFSPC_VAR($space) $confvar | |
196 | namespace eval ::confspc::$space {} | |
197 | } | |
198 | } | |
199 | ||
200 | ## Change sequence numbers are used to decide whether the linearized | |
201 | ## inclusion caches are up to date. | |
202 | set CONFSPC_LASTCHANGESEQ 0 | |
203 | set CONFSPC_CHANGESEQ 0 | |
204 | ||
205 | proc confspc-command {space name bvl body} { | |
206 | ## Define a configuration directive NAME in SPACE, accepting the arguments | |
207 | ## specified by the BVL, and executing BODY when invoked. The SPACE's | |
208 | ## configuration array is available within the BODY. | |
209 | ||
210 | global CONFSPC_CMD CONFSPC_VAR | |
211 | pushnew CONFSPC_CMD($space) $name | |
212 | ||
213 | ## Define the configuration command in the caller's namespace. | |
214 | set ns [uplevel 1 { namespace current }] | |
215 | eval [list proc ${ns}::conf/$space/$name $bvl \ | |
216 | "global $CONFSPC_VAR($space)\n$body"] | |
217 | namespace eval $ns [list namespace export conf/$space/$name] | |
218 | ||
219 | ## Now arrange for this command to exist properly in the configuration | |
220 | ## space. | |
221 | namespace eval ::confspc::$space \ | |
222 | [list namespace import ${ns}::conf/$space/$name] | |
223 | catch { | |
224 | namespace eval ::confspc::$space [list rename $name {}] | |
225 | } | |
226 | namespace eval ::confspc::$space \ | |
227 | [list rename conf/$space/$name $name] | |
228 | } | |
229 | ||
230 | proc confspc-include {space includes} { | |
231 | ## Arrange for SPACE to include the directives from the INCLUDES spaces. | |
232 | ||
233 | global CONFSPC_INCL CONFSPC_LASTCHANGESEQ CONFSPC_CHANGESEQ | |
234 | pushnew CONFSPC_INCL($space) $includes | |
235 | if {$CONFSPC_CHANGESEQ <= $CONFSPC_LASTCHANGESEQ} { | |
236 | set CONFSPC_CHANGESEQ [expr {$CONFSPC_LASTCHANGESEQ + 1}] | |
237 | } | |
238 | } | |
239 | ||
240 | proc confspc-update {space} { | |
241 | ## Update cached data for SPACE and its included spaces. We recompute the | |
242 | ## space's class-precedence list, for which we use the C3 linearization | |
243 | ## algorithm, which has known good properties. | |
244 | ||
245 | global CONFSPC_CPL CONFSPC_CHANGE CONFSPC_INCL | |
246 | global CONFSPC_CHANGESEQ CONFSPC_LASTCHANGESEQ | |
247 | set CONFSPC_LASTCHANGESEQ $CONFSPC_CHANGESEQ | |
248 | ||
249 | ## If the space is already up-to-date, do nothing. | |
250 | if {$CONFSPC_CHANGE($space) == $CONFSPC_CHANGESEQ} { return } | |
251 | ||
252 | ## Arrange for the included spaces to be up-to-date, and gather the CPLs | |
253 | ## together so we can merge them. | |
254 | set merge {} | |
255 | lappend merge [concat $space $CONFSPC_INCL($space)] | |
256 | foreach included $CONFSPC_INCL($space) { | |
257 | confspc-update $included | |
258 | lappend merge $CONFSPC_CPL($included) | |
259 | } | |
260 | ||
261 | ## Do the merge and update the change indicator. | |
262 | set CONFSPC_CPL($space) [merge-lists $merge] | |
263 | set CONFSPC_CHANGE($space) $CONFSPC_CHANGESEQ | |
264 | } | |
265 | ||
266 | proc confspc-path {ns cpl} { | |
267 | ## Update namespace NS's command path so that it has (only) the | |
268 | ## directives of the given CPL. Pass an empty CPL to clear the | |
269 | ## configuration space hacking. | |
270 | ||
271 | set path {} | |
272 | ||
273 | ## Add the new namespaces to the front. | |
274 | foreach spc $cpl { lappend path ::confspc::$spc } | |
275 | ||
276 | ## Now add the existing path items, with any existing confspc hacking | |
277 | ## stripped out. | |
278 | foreach item [namespace eval $ns { namespace path }] { | |
279 | if {![string match "::confspc::*" $item]} { lappend npath $item } | |
280 | } | |
281 | ||
282 | ## Commit the result. | |
283 | namespace eval $ns [list namespace path $path] | |
284 | } | |
285 | ||
286 | proc confspc-set {ns space} { | |
287 | ## Set the command path for namespace NS to include the configuration | |
288 | ## directives of SPACE (and its included spaces). | |
289 | ||
290 | global CONFSPC_CPL | |
291 | confspc-update $space | |
292 | confspc-path $ns $CONFSPC_CPL($space) | |
293 | } | |
294 | ||
295 | proc confspc-eval {space body} { | |
296 | ## Evaluate BODY in the current namespace, but augmented with the | |
297 | ## directives from the named SPACE. The command path of the current | |
298 | ## namespace is restored afterwards. | |
299 | ||
300 | set ns [uplevel 1 { namespace current }] | |
301 | set path [namespace eval $ns { namespace path }] | |
302 | unwind-protect { | |
303 | confspc-set $ns $space | |
304 | uplevel 1 $body | |
305 | } { | |
306 | namespace eval $ns [list namespace path $path] | |
307 | } | |
308 | } | |
309 | ||
310 | proc preserving-config {confvar body} { | |
311 | ## Evaluate BODY, but on exit restore the CONFVAR array so that the BODY | |
312 | ## has no lasting effect on it. | |
313 | ||
314 | upvar #1 $confvar CONFIG | |
315 | set old [array get CONFIG] | |
316 | unwind-protect { | |
317 | uplevel 1 $body | |
318 | } { | |
319 | array unset CONFIG | |
320 | array set CONFIG $old | |
321 | } | |
322 | } | |
323 | ||
324 | confspc-create confspc CONFSPC_CONFIG | |
325 | ||
326 | confspc-command confspc include {args} { | |
327 | ## Include the named configuration spaces in the current one. | |
328 | ||
329 | confspc-include $CONFSPC_CONFIG(space) $args | |
330 | } | |
331 | ||
332 | confspc-command confspc define {name bvl body} { | |
333 | ## Define a directive NAME in the current space, taking arguments BVL, and | |
334 | ## having the given BODY. | |
335 | ||
336 | confspc-command $CONFSPC_CONFIG(space) $name $bvl $body | |
337 | } | |
338 | ||
339 | confspc-command confspc define-simple {setting default} { | |
340 | ## Define a directive SETTING which sets the appropriately prefixed entry | |
341 | ## in the CONFIG array to its single arguments, and immediately set the | |
342 | ## CONFIG entry to DEFAULT. | |
343 | ||
344 | global CONFSPC_VAR | |
345 | set space $CONFSPC_CONFIG(space) | |
346 | upvar #0 $CONFSPC_VAR($space) config | |
347 | confspc-command $space $setting arg \ | |
348 | "set $CONFSPC_VAR($space)($CONFSPC_CONFIG(prefix)$setting) \$arg" | |
349 | set config($CONFSPC_CONFIG(prefix)$setting) $default | |
350 | } | |
351 | ||
352 | confspc-command confspc define-list {setting default} { | |
353 | ## Define a directive SETTING which sets the appropriately prefixed entry | |
354 | ## in the CONFIG array to its entire argument list, and immediately set the | |
355 | ## CONFIG entry to DEFAULT (which should be a Tcl list, not a collection of | |
356 | ## arguments). | |
357 | ||
358 | global CONFSPC_VAR | |
359 | set space $CONFSPC_CONFIG(space) | |
360 | upvar #0 $CONFSPC_VAR($space) config | |
361 | confspc-command $space $setting args \ | |
362 | "set $CONFSPC_VAR($space)($CONFSPC_CONFIG(prefix)$setting) \$args" | |
363 | set config($CONFSPC_CONFIG(prefix)$setting) $default | |
364 | } | |
365 | ||
366 | confspc-command confspc prefix {prefix} { | |
367 | set CONFSPC_CONFIG(prefix) $prefix | |
368 | } | |
369 | ||
370 | proc define-configuration-space {space confvar body} { | |
371 | ## Define a new configuration space named SPACE. The BODY is Tcl code, | |
372 | ## though it may make use of `include' and `define'. | |
373 | ||
374 | global CONFSPC_CONFIG | |
375 | set ns [uplevel 1 { namespace current }] | |
376 | set oldpath [namespace eval $ns { namespace path }] | |
377 | confspc-create $space $confvar | |
378 | unwind-protect { | |
379 | preserving-config CONFSPC_CONFIG { | |
380 | array set CONFSPC_CONFIG [list space $space \ | |
381 | prefix ""] | |
382 | confspc-set $ns confspc | |
383 | uplevel 1 $body | |
384 | } | |
385 | } { | |
386 | namespace eval $ns [list namespace path $oldpath] | |
387 | } | |
388 | } | |
389 | ||
390 | ###-------------------------------------------------------------------------- | |
391 | ### Option parsing. | |
392 | ### | |
393 | ### The option parsing machinery makes extensive use of a state array | |
394 | ### OPTPARSE_STATE in order to maintain its context. The procedure | |
395 | ### `with-option-parser' establishes this array correctly, and preserves any | |
396 | ### existing state, so there should be no trouble with multiple parsers in | |
397 | ### the same program. | |
398 | ||
399 | proc optparse-more-p {} { | |
400 | ## Answer whether there are more argument words available. | |
401 | ||
402 | upvar #0 OPTPARSE_STATE state | |
403 | if {[llength $state(words)]} { return true } else { return false } | |
404 | } | |
405 | ||
406 | proc optparse-next-word {} { | |
407 | ## Return the next word in the argument list. It is an error if there are | |
408 | ## no more words left. | |
409 | ||
410 | upvar #0 OPTPARSE_STATE state | |
411 | set word [lindex $state(words) 0] | |
412 | set state(words) [lrange $state(words) 1 end] | |
413 | return $word | |
414 | } | |
415 | ||
416 | proc optparse-error {message} { | |
417 | ## Report an error message and exit. | |
418 | ||
419 | global QUIS | |
420 | puts stderr "$QUIS: $message" | |
421 | exit 1 | |
422 | } | |
423 | ||
424 | proc optparse-option/short {var} { | |
425 | ## Parse the next short option from the current cluster. If there are no | |
426 | ## more short options, set the mode back to `free' and call back into | |
427 | ## `optparse-option/free'. | |
428 | ## | |
429 | ## See the description of `optparse-option/free' for the interface | |
430 | ## implemented by this procedure. | |
431 | ||
432 | ## Get hold of my state and the caller's array. | |
433 | upvar #0 OPTPARSE_STATE state | |
434 | upvar 1 $var opt | |
435 | ||
436 | ## Work out what to do based on the remaining length of the cluster. (The | |
437 | ## cluster shouldn't be empty because the mode should only be set to | |
438 | ## `short' if there is an initial nonempty cluster to parse, and we set it | |
439 | ## back to `free' when we consume the final character from the cluster.) | |
440 | ## Specifically, set `argp' according to whether we have a potential | |
441 | ## argument in the cluster, and `name' to the option character extracted. | |
442 | array unset opt | |
443 | switch [string length $state(rest)] { | |
444 | 0 { | |
445 | error "empty cluster" | |
446 | } | |
447 | 1 { | |
448 | set argp false | |
449 | set state(mode) free | |
450 | set name $state(rest) | |
451 | } | |
452 | default { | |
453 | set argp true | |
454 | set name [string index $state(rest) 0] | |
455 | set state(rest) [string range $state(rest) 1 end] | |
456 | } | |
457 | } | |
458 | ||
459 | ## Try to look up the option in the map. | |
460 | if {![dict exists $state(short-map) $name]} { | |
461 | optparse-error "Unknown option `$state(prefix)$name'" | |
462 | } | |
463 | array set opt [dict get $state(short-map) $name] | |
464 | set state(name) $name | |
465 | ||
466 | ## Collect an argument if one is required. | |
467 | catch { unset state(arg) } | |
468 | switch -glob -- "$opt(arg),$argp" { | |
469 | "required,false" { | |
470 | if {![optparse-more-p]} { | |
471 | optparse-error "Option `$state(prefix)$name' requires an argument" | |
472 | } | |
473 | set state(arg) [optparse-next-word] | |
474 | } | |
475 | "required,true" - "optional,true" { | |
476 | set state(arg) $state(rest) | |
477 | set state(mode) free | |
478 | } | |
479 | } | |
480 | ||
481 | ## Report success. | |
482 | return 1 | |
483 | } | |
484 | ||
485 | proc optparse-option/free {var} { | |
486 | ## Parse the next option from the argument list. This procedure is called | |
487 | ## to process a new argument word, i.e., we are in `free' mode. It | |
488 | ## analyses the next argument word and either processes it internally or | |
489 | ## sets the mode appropriately and calls a specialized handler | |
490 | ## `optparse-option/MODE' for that mode. | |
491 | ## | |
492 | ## The interface works as follows. If an option was found, then the array | |
493 | ## VAR is set according to the option's settings dictionary; and state | |
494 | ## variables are set as follows. | |
495 | ## | |
496 | ## prefix The prefix character(s) to write before the option name in | |
497 | ## messages, e.g., `--' for long options. | |
498 | ## | |
499 | ## name The option name without any prefix attached. | |
500 | ## | |
501 | ## arg The option's argument, if there is one; otherwise unset. | |
502 | ||
503 | upvar #0 OPTPARSE_STATE state | |
504 | upvar 1 $var opt | |
505 | ||
506 | ## Set stuff up. | |
507 | array unset opt | |
508 | catch { unset state(arg) } | |
509 | if {![optparse-more-p]} { return 0 } | |
510 | set word [optparse-next-word] | |
511 | ||
512 | ## Work out what to do based on the word. The order of these tests is | |
513 | ## critically important. | |
514 | switch -glob -- $word { | |
515 | ||
516 | "--" { | |
517 | ## End-of-options marker. | |
518 | ||
519 | return 0 | |
520 | } | |
521 | ||
522 | "--*" { | |
523 | ## Long option. | |
524 | ||
525 | set state(prefix) "--" | |
526 | ||
527 | ## If there's an equals sign, the name is the bit to the left; keep the | |
528 | ## remainder as an argument. | |
529 | set eq [string first "=" $word 2] | |
530 | if {$eq >= 0} { | |
531 | set name [string range $word 2 [expr {$eq - 1}]] | |
532 | set state(arg) [string range $word [expr {$eq + 1}] end] | |
533 | set argp true | |
534 | } else { | |
535 | set name [string range $word 2 end] | |
536 | set argp false | |
537 | } | |
538 | set state(name) name | |
539 | ||
540 | ## Look the name up in the map. | |
541 | if {[dict exists $state(long-map) $name]} { | |
542 | array set opt [dict get $state(long-map) $name] | |
543 | } else { | |
544 | set matches [dict keys $state(long-map) "$name*"] | |
545 | switch -exact -- [llength $matches] { | |
546 | 1 { array set opt [dict get $state(long-map) [lindex $matches 0]] } | |
547 | 0 { optparse-error "Unknown option `--$name'" } | |
548 | default { | |
549 | optparse-error "Ambiaguous option `--$name' \ | |
550 | (matches: --[join $matches {, --}])" | |
551 | } | |
552 | } | |
553 | } | |
554 | ||
555 | ## Now check whether we want an argument. The missing cases are | |
556 | ## because we are already in the correct state. | |
557 | switch -glob -- "$opt(arg),$argp" { | |
558 | "none,true" { | |
559 | optparse-error "Option `$name' doesn't accept an argument" | |
560 | } | |
561 | "required,false" { | |
562 | if {![optparse-more-p]} { | |
563 | optparse-error "Option `$name' requires an argument" | |
564 | } | |
565 | set state(arg) [optparse-next-word] | |
566 | } | |
567 | } | |
568 | ||
569 | ## Done. We consumed either one or two entire argument words, so we | |
570 | ## should remain in the `free' state. | |
571 | return 1 | |
572 | } | |
573 | ||
574 | "-?*" { | |
575 | ## Short option. Set state, initialize the cluster, and go. | |
576 | ||
577 | set state(rest) [string range $word 1 end] | |
578 | set state(mode) short | |
579 | set state(prefix) "-" | |
580 | return [optparse-option/short opt] | |
581 | } | |
582 | ||
583 | default { | |
584 | ## Some non-option thing. Under POSIX rules, this ends the parse. (We | |
585 | ## could do something more adventurous later.) | |
586 | ||
587 | set state(words) [concat [list $word] $state(words)] | |
588 | return 0 | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | proc optparse-arg-p {} { | |
594 | ## Return the whether the most recently processed option had an argument. | |
595 | ||
596 | upvar #0 OPTPARSE_STATE state | |
597 | return [info exists state(arg)] | |
598 | } | |
599 | ||
600 | proc optparse-arg {} { | |
601 | ## Return the argument from the most recently processed option. It is an | |
602 | ## error if no argument was supplied. | |
603 | ||
604 | upvar #0 OPTPARSE_STATE state | |
605 | return $state(arg) | |
606 | } | |
607 | ||
608 | proc optparse-words {} { | |
609 | ## Return the remaining unparsed argument words as a list. | |
610 | ||
611 | upvar #0 OPTPARSE_STATE state | |
612 | return $state(words) | |
613 | } | |
614 | ||
615 | proc optparse-option {} { | |
616 | ## Parse the next option(s). The action taken depends on the option | |
617 | ## dictionary: if an `action' is provided then it is evaluated in the | |
618 | ## caller's context; otherwise the option's `tag' is returned. | |
619 | ||
620 | upvar #0 OPTPARSE_STATE state | |
621 | while 1 { | |
622 | if {![optparse-option/$state(mode) opt]} { | |
623 | return done | |
624 | } elseif {[info exists opt(action)]} { | |
625 | uplevel 1 $opt(action) | |
626 | } elseif {[info exists opt(tag)]} { | |
627 | return $opt(tag) | |
628 | } else { | |
629 | error "Don't know what to do with option `$state(prefix)$state(name)'" | |
630 | } | |
631 | } | |
632 | } | |
633 | ||
634 | proc with-option-parser {state words body} { | |
635 | ## Establish an option parsing context, initialized with the STATE | |
636 | ## (constructed using `define-options') and the lits of argument WORDS. | |
637 | ## The BODY may use `optparse-option', `optparse-arg', etc. to parse the | |
638 | ## options. | |
639 | ||
640 | global OPTPARSE_STATE | |
641 | set old [array get OPTPARSE_STATE] | |
642 | ||
643 | unwind-protect { | |
644 | array unset OPTPARSE_STATE | |
645 | array set OPTPARSE_STATE $state | |
646 | set OPTPARSE_STATE(mode) free | |
647 | set OPTPARSE_STATE(words) $words | |
648 | uplevel 1 $body | |
649 | } { | |
650 | array set OPTPARSE_STATE $old | |
651 | } | |
652 | } | |
653 | ||
654 | define-configuration-space optparse-option OPTCFG { | |
655 | define-list short {} | |
656 | define-list long {} | |
657 | define action {act} { set OPTCFG(action) $act } | |
658 | define tag {tag} { set OPTCFG(tag) $tag } | |
659 | define-simple arg none | |
660 | } | |
661 | ||
662 | define-configuration-space optparse OPTCFG { | |
663 | define option {body} { | |
664 | upvar #0 OPTPARSE_STATE state | |
665 | uplevel 1 [list confspc-eval optparse-option $body] | |
666 | set opt [array get OPTCFG] | |
667 | foreach kind {long short} { | |
668 | foreach name $OPTCFG($kind) { | |
669 | if {[dict exists $state($kind-map) $name]} { | |
670 | error "Already have an option with $kind name `$name'" | |
671 | } | |
672 | dict set state($kind-map) $name $opt | |
673 | } | |
674 | } | |
675 | } | |
676 | } | |
677 | ||
678 | proc define-options {statevar body} { | |
679 | ## Define an option state, and write it to STATEVAR. The BODY may contain | |
680 | ## `optparse' configuration directives to define the available options. | |
681 | ||
682 | global OPTPARSE_STATE | |
683 | upvar 1 $statevar state | |
684 | set old [array get OPTPARSE_STATE] | |
685 | unwind-protect { | |
686 | array unset OPTPARSE_STATE | |
687 | if {[info exists state]} { | |
688 | array set OPTPARSE_STATE $state | |
689 | } else { | |
690 | array set OPTPARSE_STATE { | |
691 | long-map {} | |
692 | short-map {} | |
693 | } | |
694 | } | |
695 | uplevel 1 [list confspc-eval optparse $body] | |
696 | set state [array get OPTPARSE_STATE] | |
697 | } { | |
698 | array set OPTPARSE_STATE $old | |
699 | } | |
700 | } | |
701 | ||
702 | ###-------------------------------------------------------------------------- | |
703 | ### Subcommand handling. | |
704 | ||
705 | ## Determine the program name. | |
706 | set QUIS [file tail $argv0] | |
707 | ||
708 | ## This is fluid-bound to the name of the current command. | |
709 | set COMMAND {} | |
710 | ||
711 | proc find-command {name} { | |
712 | ## Given a command NAME as typed by the user, find the actual command and | |
713 | ## return it. | |
714 | ||
715 | global HELP | |
716 | set matches [info commands cmd/$name*] | |
717 | set cmds {} | |
718 | set doc {} | |
719 | foreach match $matches { | |
720 | set cmd [string range $match 4 end] | |
721 | lappend cmds $cmd | |
722 | if {[info exists HELP($cmd)]} { lappend doc $cmd } | |
723 | } | |
724 | switch -exact -- [llength $cmds] { | |
725 | 1 { return [lindex $cmds 0] } | |
726 | 0 { optparse-error "Unknown command `$name'" } | |
727 | } | |
728 | if {[llength $doc]} { set cmds $doc } | |
729 | switch -exact -- [llength $cmds] { | |
730 | 1 { return [lindex $cmds 0] } | |
731 | 0 { optparse-error "Unknown command `$name'" } | |
732 | default { optparse-error "Ambiguous command `$name' -- matches: $cmds" } | |
733 | } | |
734 | } | |
735 | ||
736 | proc usage {cmd} { | |
737 | ## Return a usage message for CMD. The message is taken from the `USAGE' | |
738 | ## array if that contains an entry for CMD (it should not include the | |
739 | ## command name, and should begin with a leading space); otherwise a | |
740 | ## message is constructed by examining the argument names and defaulting | |
741 | ## arrangements of the Tcl command cmd/CMD. | |
742 | ## | |
743 | ## By convention, the main program is denoted by an empty CMD name. | |
744 | ||
745 | global USAGE | |
746 | if {[info exists USAGE($cmd)]} { | |
747 | set usage $USAGE($cmd) | |
748 | } else { | |
749 | set usage "" | |
750 | foreach arg [info args cmd/$cmd] { | |
751 | if {[string equal $arg "args"]} { | |
752 | append usage " ..." | |
753 | } elseif {[info default cmd/$cmd $arg hunoz]} { | |
754 | append usage " \[[string toupper $arg]\]" | |
755 | } else { | |
756 | append usage " [string toupper $arg]" | |
757 | } | |
758 | } | |
759 | } | |
760 | return $usage | |
761 | } | |
762 | ||
763 | proc usage-error {} { | |
764 | ## Report a usage error in the current command. The message is obtained by | |
765 | ## the `usage' procedure. | |
766 | ||
767 | global QUIS COMMAND | |
768 | if {[string length $COMMAND]} { set cmd " $COMMAND" } else { set cmd "" } | |
769 | puts stderr "Usage: $QUIS$cmd[usage $COMMAND]" | |
770 | exit 1 | |
771 | } | |
772 | ||
773 | proc dispatch {name argv} { | |
774 | ## Invokes the handler for CMD, passing it the argument list ARGV. This | |
775 | ## does some minimal syntax checking by examining the argument list to the | |
776 | ## command handler procedure cmd/COMMAND and issuing a usage error if | |
777 | ## there's a mismatch. | |
778 | ||
779 | global COMMAND | |
780 | let COMMAND [find-command $name] { | |
781 | ||
782 | ## Decode the argument list of the handler and set min and max | |
783 | ## appropriately. | |
784 | set args [info args cmd/$COMMAND] | |
785 | if {![llength $args]} { | |
786 | set* {min max} {0 0} | |
787 | } else { | |
788 | if {[string equal [lindex $args end] "args"]} { | |
789 | set max inf | |
790 | set args [lrange $args 0 end-1] | |
791 | } else { | |
792 | set max [llength $args] | |
793 | } | |
794 | set min 0 | |
795 | foreach arg $args { | |
796 | if {[info default cmd/$COMMAND $arg hunoz]} { break } | |
797 | incr min | |
798 | } | |
799 | } | |
800 | ||
801 | ## Complain if the number of arguments is inappropriate. | |
802 | set n [llength $argv] | |
803 | if {$n < $min || ($max != inf && $n > $max)} { usage-error } | |
804 | ||
805 | ## Invoke the handler. | |
806 | eval cmd/$COMMAND $argv | |
807 | } | |
808 | } | |
809 | ||
810 | define-configuration-space subcommand SUBCMD { | |
811 | define-simple help-text - | |
812 | define-simple usage-text - | |
813 | } | |
814 | ||
815 | proc defcmd {name bvl defs body} { | |
816 | ## Define a command NAME with arguments BVL. The `usage-text' and | |
817 | ## `help-text' commands can be used in DEFS to set messages for the new | |
818 | ## command. | |
819 | ||
820 | global SUBCMD USAGE HELP | |
821 | ||
822 | preserving-config SUBCMD { | |
823 | confspc-eval subcommand { uplevel 1 $defs } | |
824 | foreach tag {usage-text help-text} array {USAGE HELP} { | |
825 | if {![string equal $SUBCMD($tag) -]} { | |
826 | set ${array}($name) $SUBCMD($tag) | |
827 | } | |
828 | } | |
829 | } | |
830 | proc cmd/$name $bvl $body | |
831 | } | |
832 | ||
833 | ## Standard subcommand handler to show information about the program or its | |
834 | ## subcommands. To use this, you need to set a bunch of variables. | |
835 | ## | |
836 | ## USAGE(cmd) Contains the usage message for cmd -- including | |
837 | ## leading space -- to use instead of the `usage' | |
838 | ## procedure's automagic. | |
839 | ## | |
840 | ## HELP(cmd) Contains descriptive text -- not including a final | |
841 | ## trailing newline -- about the command. | |
842 | ## | |
843 | ## VERSION The program's version number. | |
844 | ## | |
845 | ## The `defcmd' procedure can be used to set these things up conveniently. | |
846 | defcmd help {args} { | |
847 | usage-text " \[SUBCOMMAND ...]" | |
848 | help-text "Show help on the given SUBCOMMANDs, or on the overall program." | |
849 | } { | |
850 | global QUIS VERSION USAGE HELP | |
851 | if {[llength $args]} { | |
852 | foreach name $args { | |
853 | set cmd [find-command $name] | |
854 | puts "Usage: $QUIS $cmd[usage $cmd]" | |
855 | if {[info exists HELP($cmd)]} { puts "\n$HELP($cmd)" } | |
856 | } | |
857 | } else { | |
858 | puts "$QUIS, version $VERSION\n" | |
859 | puts "Usage: $QUIS$USAGE()\n" | |
860 | if {[info exists HELP()]} { puts "$HELP()\n" } | |
861 | puts "Subcommands available:" | |
862 | foreach name [info commands cmd/*] { | |
863 | set cmd [string range $name 4 end] | |
864 | puts "\t$cmd[usage $cmd]" | |
865 | } | |
866 | } | |
867 | } | |
868 | ||
869 | ###-------------------------------------------------------------------------- | |
870 | ### Build the configuration space for zone files. | |
871 | ||
872 | proc host-addr {host} { | |
873 | ## Given a HOST name, return a list of its addresses. | |
874 | ||
875 | if {![string match $host {*[!0-9.]*}]} { return $host } | |
876 | set adns [open [list | adnshost +Dc -s $host] r] | |
877 | unwind-protect { | |
878 | set addrs {} | |
879 | while {[gets $adns line] >= 0} { | |
880 | set* {name type fam addr} $line | |
881 | switch -glob -- $type:$fam { | |
882 | A:INET { lappend addrs $addr } | |
883 | } | |
884 | } | |
885 | return [lindex $addrs 0] | |
886 | } { | |
887 | close $adns | |
888 | } | |
889 | } | |
890 | ||
891 | proc host-canonify {host} { | |
892 | ## Given a HOST name, return a canonical version of it. | |
893 | ||
894 | set adns [open [list | adnshost -Dc -s $host] r] | |
895 | unwind-protect { | |
896 | while {[gets $adns line] >= 0} { | |
897 | switch -exact -- [lindex $line 1] { | |
898 | CNAME { return [lindex $line 2] } | |
899 | A - AAAA { return [lindex $line 0] } | |
900 | } | |
901 | } | |
902 | error "failed to canonify $host" | |
903 | } { | |
904 | close $adns | |
905 | } | |
906 | } | |
907 | ||
908 | proc local-address-p {addr} { | |
909 | ## Answer whether the ADDR is one of the host's addresses. | |
910 | ||
911 | if {[catch { set sk [socket -server {} -myaddr $addr 0] }]} { | |
912 | return false | |
913 | } else { | |
914 | close $sk | |
915 | return true | |
916 | } | |
917 | } | |
918 | ||
919 | ## The list of zones configured by the user. | |
920 | set ZONES {} | |
921 | ||
922 | ## Dynamic zone update policy specifications. | |
923 | define-configuration-space policy ZONECFG { | |
924 | define allow {identity nametype name args} { | |
925 | lappend ZONECFG(ddns-policy) \ | |
926 | [concat grant [list $identity $nametype $name] $args] | |
927 | } | |
928 | define deny {identity nametype name args} { | |
929 | lappend ZONECFG(ddns-policy) \ | |
930 | [concat deny [list $identity $nametype $name] $args] | |
931 | } | |
932 | } | |
933 | ||
934 | ## Dynamic zone details. | |
935 | define-configuration-space dynamic ZONECFG { | |
936 | prefix "ddns-" | |
937 | define-simple key "ddns" | |
938 | define-list types {A TXT PTR} | |
939 | ||
940 | define policy {body} { | |
941 | set ZONECFG(ddns-policy) {} | |
942 | uplevel 1 [list confspc-eval policy $body] | |
943 | } | |
944 | ||
945 | set ZONECFG(ddns-policy) {} | |
946 | } | |
947 | ||
948 | ## Everything about a zone. | |
949 | define-configuration-space zone ZONECFG { | |
950 | define-simple user root | |
951 | define-simple master-dir "/var/lib/bind" | |
952 | define-simple slave-dir "/var/cache/bind" | |
953 | define-simple dir-mode 2775 | |
954 | define-simple zone-file "%v/%z.zone" | |
955 | define-list views * | |
956 | define-list reload-command {/usr/sbin/rndc reload %z IN %v} | |
957 | define-list checkzone-command { | |
958 | /usr/sbin/named-checkzone | |
959 | -i full | |
960 | -k fail | |
961 | -M fail | |
962 | -n fail | |
963 | -S fail | |
964 | -W fail | |
965 | %z | |
966 | %f | |
967 | } | |
968 | ||
969 | define primary {map} { | |
970 | if {[llength $map] % 2} { | |
971 | error "master map must have an even number of items" | |
972 | } | |
973 | set ZONECFG(master-map) $map | |
974 | } | |
975 | ||
976 | define dynamic {{body {}}} { | |
977 | array set ZONECFG [list type dynamic] | |
978 | uplevel 1 [list confspc-eval dynamic $body] | |
979 | } | |
980 | ||
981 | define view-map {map} { | |
982 | if {[llength $map] % 2} { | |
983 | error "view map must have an even number of items" | |
984 | } | |
985 | set ZONECFG(view-map) $map | |
986 | } | |
987 | ||
988 | array set ZONECFG { | |
989 | type static | |
990 | view-map {* =} | |
991 | } | |
992 | } | |
993 | ||
994 | ## Top-level configuration. Allow most zone options to be set here, so that | |
995 | ## one can set defaults for multiple zones conveniently. | |
996 | define-configuration-space toplevel ZONECFG { | |
997 | include zone | |
998 | ||
999 | define-list all-views {} | |
1000 | define-simple conf-file "/var/lib/zoneconf/config/%v.conf" | |
1001 | define-simple max-zone-size [expr {512*1024}] | |
1002 | define-list reconfig-command {/usr/sbin/rndc reconfig} | |
1003 | ||
1004 | define scope {body} { preserving-config ZONECFG { uplevel 1 $body } } | |
1005 | ||
1006 | define zone {name {body {}}} { | |
1007 | global ZONES | |
1008 | preserving-config ZONECFG { | |
1009 | array set ZONECFG \ | |
1010 | [list name $name \ | |
1011 | type static] | |
1012 | uplevel 1 [list confspc-eval zone $body] | |
1013 | lappend ZONES [array get ZONECFG] | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | ###-------------------------------------------------------------------------- | |
1019 | ### Processing the results. | |
1020 | ||
1021 | proc zone-file-name {view config} { | |
1022 | ## Return the relative file name for the zone described by CONFIG, relative | |
1023 | ## to the given VIEW. An absolute filename may be derived later, depending | |
1024 | ## on whether the zone data is static and the calling host is the master | |
1025 | ## for the zone. | |
1026 | ||
1027 | array set zone $config | |
1028 | return [string map [list \ | |
1029 | "%v" $view \ | |
1030 | "%z" $zone(name)] \ | |
1031 | $zone(zone-file)] | |
1032 | } | |
1033 | ||
1034 | proc output-file-name {view} { | |
1035 | ## Return the output file name for the given VIEW. | |
1036 | ||
1037 | global ZONECFG | |
1038 | return [string map [list %v $view] $ZONECFG(conf-file)] | |
1039 | } | |
1040 | ||
1041 | proc compute-zone-properties {view config} { | |
1042 | ## Derive interesting information from the zone configuration plist CONFIG, | |
1043 | ## relative to the stated VIEW. Return a new plist. | |
1044 | ||
1045 | array set zone $config | |
1046 | ||
1047 | ## See whether the zone matches the view. | |
1048 | set match 0 | |
1049 | foreach wanted $zone(views) { | |
1050 | if {[string match $wanted $view]} { set match 1; break } | |
1051 | } | |
1052 | if {!$match} { return {config-type ignore} } | |
1053 | ||
1054 | ## Transform the view name according to the view map. | |
1055 | foreach {inview outview} $zone(view-map) { | |
1056 | if {![string match $inview $view]} { continue } | |
1057 | switch -exact -- $outview { | |
1058 | = { set zone(mapped-view) $view } | |
1059 | default { set zone(mapped-view) $outview } | |
1060 | } | |
1061 | break | |
1062 | } | |
1063 | ||
1064 | ## Find out where the master is supposed to be. | |
1065 | set zone(config-type) ignore | |
1066 | if {[info exists zone(mapped-view)]} { | |
1067 | foreach {outview hosts} $zone(master-map) { | |
1068 | if {[string match $outview $zone(mapped-view)]} { | |
1069 | set zone(masters) $hosts | |
1070 | set zone(config-type) slave | |
1071 | foreach host $hosts { | |
1072 | if {[local-address-p $host]} { | |
1073 | set zone(config-type) master | |
1074 | } | |
1075 | } | |
1076 | break | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | ## Main dispatch for zone categorization. | |
1082 | switch -exact -- $zone(config-type) { | |
1083 | master { | |
1084 | switch -exact -- $zone(type) { | |
1085 | static { | |
1086 | set zone(file-name) \ | |
1087 | [file join $zone(master-dir) \ | |
1088 | [zone-file-name $zone(mapped-view) $config]] | |
1089 | } | |
1090 | dynamic { | |
1091 | set zone(file-name) [file join $zone(slave-dir) \ | |
1092 | [zone-file-name $view $config]] | |
1093 | } | |
1094 | } | |
1095 | } | |
1096 | slave { | |
1097 | set zone(file-name) [file join $zone(slave-dir) \ | |
1098 | [zone-file-name $view $config]] | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | ## Done. | |
1103 | return [array get zone] | |
1104 | } | |
1105 | ||
1106 | proc write-ddns-update-policy {prefix chan config} { | |
1107 | ## Write an `update-policy' stanza to CHAN for the zone described by the | |
1108 | ## CONFIG plist. The PREFIX is written to the start of each line. | |
1109 | ||
1110 | array set zone $config | |
1111 | puts $chan "${prefix}update-policy {" | |
1112 | set policyskel "${prefix}\t%s %s %s \"%s\" %s;" | |
1113 | ||
1114 | foreach item $zone(ddns-policy) { | |
1115 | set* {verb ident type name} [lrange $item 0 3] | |
1116 | set rrtypes [lrange $item 4 end] | |
1117 | puts $chan [format $policyskel \ | |
1118 | $verb \ | |
1119 | $ident \ | |
1120 | $type \ | |
1121 | $name \ | |
1122 | $rrtypes] | |
1123 | } | |
1124 | ||
1125 | puts $chan [format $policyskel \ | |
1126 | grant \ | |
1127 | $zone(ddns-key) \ | |
1128 | subdomain \ | |
1129 | $zone(name) \ | |
1130 | $zone(ddns-types)] | |
1131 | ||
1132 | puts $chan "${prefix}};" | |
1133 | } | |
1134 | ||
1135 | proc write-zone-stanza {view chan config} { | |
1136 | ## Write a `zone' stanza to CHAN for the zone described by the CONFIG | |
1137 | ## plist in the given VIEW. | |
1138 | ||
1139 | array set zone [compute-zone-properties $view $config] | |
1140 | if {[string equal $zone(config-type) "ignore"]} { return } | |
1141 | ||
1142 | ## Create the directory for the zone files. | |
1143 | set dir [file dirname $zone(file-name)] | |
1144 | if {![file isdirectory $dir]} { | |
1145 | file mkdir $dir | |
1146 | exec chmod $zone(dir-mode) $dir | |
1147 | } | |
1148 | ||
1149 | ## Write the configuration fragment. | |
1150 | puts $chan "\nzone \"$zone(name)\" {" | |
1151 | switch -glob -- $zone(config-type) { | |
1152 | master { | |
1153 | puts $chan "\ttype master;" | |
1154 | puts $chan "\tfile \"$zone(file-name)\";" | |
1155 | switch -exact -- $zone(type) { | |
1156 | dynamic { write-ddns-update-policy "\t" $chan $config } | |
1157 | } | |
1158 | } | |
1159 | slave { | |
1160 | puts $chan "\ttype slave;" | |
1161 | set masters {} | |
1162 | foreach host $zone(masters) { lappend masters [host-addr $host] } | |
1163 | puts $chan "\tmasters { [join $masters {; }]; };" | |
1164 | puts $chan "\tfile \"$zone(file-name)\";" | |
1165 | switch -exact -- $zone(type) { | |
1166 | dynamic { puts $chan "\tallow-update-forwarding { any; };" } | |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | puts $chan "};"; | |
1171 | } | |
1172 | ||
1173 | ###-------------------------------------------------------------------------- | |
1174 | ### Command-line interface. | |
1175 | ||
1176 | set CONFFILE "/etc/bind/zones.in" | |
1177 | ||
1178 | defcmd outputs {} { | |
1179 | help-text "List the output file names to stdout." | |
1180 | } { | |
1181 | global ZONECFG CONFFILE | |
1182 | ||
1183 | confspc-eval toplevel [list source $CONFFILE] | |
1184 | foreach view $ZONECFG(all-views) { puts [output-file-name $view] } | |
1185 | } | |
1186 | ||
1187 | defcmd update {} { | |
1188 | help-text "Generate BIND configuration files." | |
1189 | } { | |
1190 | global ZONECFG ZONES CONFFILE | |
1191 | ||
1192 | confspc-eval toplevel [list source $CONFFILE] | |
1193 | set win false | |
1194 | unwind-protect { | |
1195 | foreach view $ZONECFG(all-views) { | |
1196 | set out($view) [output-file-name $view] | |
1197 | set chan($view) [open "$out($view).new" w] | |
1198 | set now [clock format [clock seconds] -format "%Y-%m-%d %H:%M:%S"] | |
1199 | puts $chan($view) "### -*-conf-javaprop-*-" | |
1200 | puts $chan($view) "### Generated at $now: do not edit" | |
1201 | foreach zone $ZONES { | |
1202 | write-zone-stanza $view $chan($view) $zone | |
1203 | } | |
1204 | } | |
1205 | set win true | |
1206 | } { | |
0c009ef6 | 1207 | foreach view $ZONECFG(all-views) { close $chan($view) } |
2a65b7cf MW |
1208 | if {$win} { |
1209 | foreach view $ZONECFG(all-views) { | |
1210 | file rename -force -- "$out($view).new" $out($view) | |
1211 | } | |
1212 | eval exec $ZONECFG(reconfig-command) | |
1213 | } else { | |
1214 | file delete -force -- "$out($view).new" | |
1215 | } | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | defcmd install {user view name} { | |
1220 | help-text "Install a new zone file. | |
1221 | ||
1222 | The file is for the given zone NAME and the \(user-side) VIEW. The file is | |
1223 | provided by the named USER" | |
1224 | } { | |
1225 | global QUIS ZONECFG ZONES CONFFILE errorInfo errorCode | |
1226 | ||
1227 | confspc-eval toplevel [list source $CONFFILE] | |
1228 | ||
1229 | file mkdir [file join $ZONECFG(master-dir) "tmp"] | |
1230 | ||
1231 | set cleanup {} | |
1232 | unwind-protect { | |
1233 | ||
1234 | set matchview {} | |
1235 | foreach iview $ZONECFG(all-views) { | |
1236 | foreach info $ZONES { | |
1237 | array unset zone | |
1238 | array set zone [compute-zone-properties $iview $info] | |
1239 | if {[string equal $user $zone(user)] && \ | |
1240 | [string equal "$zone(config-type)/$zone(type)" \ | |
1241 | "master/static"] && \ | |
1242 | [string equal $zone(name) $name] && \ | |
1243 | [string equal $zone(mapped-view) $view]} { | |
1244 | lappend matchview $iview | |
1245 | if {![info exists matchinfo]} { set matchinfo [array get zone] } | |
1246 | } | |
1247 | } | |
1248 | } | |
1249 | if {![llength $matchview]} { | |
1250 | optparse-error "No match for zone `$name' in view `$view'" | |
1251 | } | |
1252 | array unset zone | |
1253 | array set zone $matchinfo | |
1254 | ||
1255 | set pid [pid] | |
1256 | for {set i 0} {$i < 1000} {incr i} { | |
1257 | set tmp [file join $ZONECFG(master-dir) "tmp" \ | |
1258 | "tmp.$pid.$i.$user.$name"] | |
1259 | if {![catch { set chan [open $tmp {WRONLY CREAT EXCL}] } msg]} { | |
1260 | break | |
1261 | } elseif {[string equal [lindex $errorCode 0] POSIX] && \ | |
1262 | ![string equal [lindex $errorCode 1] EEXIST]} { | |
1263 | error $msg $errorInfo $errorCode | |
1264 | } | |
1265 | } | |
1266 | if {![info exists chan]} { error "failed to create temporary file" } | |
1267 | set cleanup [list file delete $tmp] | |
1268 | ||
1269 | set total 0 | |
1270 | while {true} { | |
1271 | set stuff [read stdin 4096] | |
1272 | if {![string length $stuff]} { break } | |
1273 | puts -nonewline $chan $stuff | |
1274 | incr total [string bytelength $stuff] | |
1275 | if {$total > $ZONECFG(max-zone-size)} { | |
1276 | error "zone file size limit exceeded" | |
1277 | } | |
1278 | } | |
1279 | close $chan | |
1280 | ||
1281 | set cmd {} | |
1282 | foreach item $zone(checkzone-command) { | |
1283 | lappend cmd [string map [list \ | |
1284 | "%z" $name \ | |
1285 | "%v" $view \ | |
1286 | "%f" $tmp] \ | |
1287 | $item] | |
1288 | } | |
1289 | set rc [catch { | |
1290 | set out [eval exec $cmd] | |
1291 | } msg] | |
1292 | if {$rc} { set out $msg } | |
1293 | set out "| [string map [list "\n" "\n| "] $out]" | |
1294 | if {$rc} { | |
1295 | puts stderr "$QUIS: zone check failed..." | |
1296 | puts stderr $out | |
1297 | exit 1 | |
1298 | } else { | |
1299 | puts "$QUIS: zone check output..." | |
1300 | puts $out | |
1301 | } | |
1302 | ||
1303 | file rename -force -- $tmp $zone(file-name) | |
1304 | set cleanup {} | |
1305 | foreach view $matchview { | |
1306 | set cmd {} | |
1307 | foreach item $zone(reload-command) { | |
1308 | lappend cmd [string map [list \ | |
1309 | "%v" $view \ | |
1310 | "%z" $zone(name)] \ | |
1311 | $item] | |
1312 | } | |
1313 | eval exec $cmd | |
1314 | } | |
1315 | } { | |
1316 | eval $cleanup | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | ###-------------------------------------------------------------------------- | |
1321 | ### Main program. | |
1322 | ||
1323 | set VERSION "1.0.0" | |
1324 | set USAGE() " \[-OPTIONS] SUBCOMMAND \[ARGUMENTS...]" | |
1325 | ||
1326 | define-options OPTS { | |
1327 | option { | |
1328 | short "h"; long "help" | |
1329 | action { eval cmd/help [optparse-words]; exit } | |
1330 | } | |
1331 | option { | |
1332 | short "v"; long "version" | |
1333 | action { puts "$QUIS, version $VERSION"; exit } | |
1334 | } | |
1335 | option { | |
1336 | short "c"; long "config"; arg required | |
1337 | action { set CONFFILE [optparse-arg] } | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | with-option-parser $OPTS $argv { | |
1342 | optparse-option | |
1343 | set argv [optparse-words] | |
1344 | } | |
1345 | ||
1346 | if {![llength $argv]} { usage-error } | |
1347 | dispatch [lindex $argv 0] [lrange $argv 1 end] | |
1348 | ||
1349 | ###----- That's all, folks -------------------------------------------------- |