root/src/noit_conf.c

Revision 4fd2f1f5cb3d57993fc34dc8d6e742d38454609f, 23.6 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 6 years ago)

This appears to work... now we need to make sure it works well. refs #142

  • Property mode set to 100644
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1 /*
2  * Copyright (c) 2007, OmniTI Computer Consulting, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are
7  * met:
8  *
9  *     * Redistributions of source code must retain the above copyright
10  *       notice, this list of conditions and the following disclaimer.
11  *     * Redistributions in binary form must reproduce the above
12  *       copyright notice, this list of conditions and the following
13  *       disclaimer in the documentation and/or other materials provided
14  *       with the distribution.
15  *     * Neither the name OmniTI Computer Consulting, Inc. nor the names
16  *       of its contributors may be used to endorse or promote products
17  *       derived from this software without specific prior written
18  *       permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 #include "noit_defines.h"
34
35 #include <stdio.h>
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <errno.h>
39 #include <assert.h>
40 #include <libxml/parser.h>
41 #include <libxml/tree.h>
42 #include <libxml/xpath.h>
43 #include <zlib.h>
44
45 #include "noit_conf.h"
46 #include "noit_check.h"
47 #include "noit_console.h"
48 #include "utils/noit_hash.h"
49 #include "utils/noit_log.h"
50 #include "utils/noit_b64.h"
51
52 /* tmp hash impl, replace this with something nice */
53 static noit_hash_table _tmp_config = NOIT_HASH_EMPTY;
54 static xmlDocPtr master_config = NULL;
55 static char master_config_file[PATH_MAX] = "";
56 static xmlXPathContextPtr xpath_ctxt = NULL;
57
58 /* This is used to notice config changes and journal the config out
59  * using a user-specified function.  It supports allowing multiple config
60  * changed to coalesce so you don't write out 1000 changes in a few seconds.
61  */
62 static u_int32_t __config_gen = 0;
63 static u_int32_t __config_coalesce = 0;
64 static u_int32_t __config_coalesce_time = 0;
65 void noit_conf_coalesce_changes(u_int32_t seconds) {
66   __config_coalesce_time = seconds;
67 }
68 void noit_conf_mark_changed() {
69   /* increment the change counter -- in case anyone cares */
70   __config_gen++;
71   /* reset the coalesce counter.  It is decremented each second and
72    * the journal function fires on a transition from 1 => 0
73    */
74   __config_coalesce = __config_coalesce_time;
75 }
76 struct recurrent_journaler {
77   int (*journal_config)(void *);
78   void *jc_closure;
79 };
80 static int
81 noit_conf_watch_config_and_journal(eventer_t e, int mask, void *closure,
82                                    struct timeval *now) {
83   struct recurrent_journaler *rj = closure;
84   eventer_t newe;
85
86   if(__config_coalesce == 1)
87     rj->journal_config(rj->jc_closure);
88   if(__config_coalesce > 0)
89     __config_coalesce--;
90
91   /* Schedule the same event to fire a second form now */
92   newe = eventer_alloc();
93   gettimeofday(&newe->whence, NULL);
94   newe->whence.tv_sec += 1;
95   newe->mask = EVENTER_TIMER;
96   newe->callback = noit_conf_watch_config_and_journal;
97   newe->closure = closure;
98   eventer_add(newe);
99   return 0;
100 }
101 void
102 noit_conf_watch_and_journal_watchdog(int (*f)(void *), void *c) {
103   struct recurrent_journaler *rj;
104   struct timeval __now;
105   rj = calloc(1, sizeof(*rj));
106   rj->journal_config = f;
107   rj->jc_closure = c;
108   gettimeofday(&__now, NULL);
109   noit_conf_watch_config_and_journal(NULL, EVENTER_TIMER, rj, &__now);
110 }
111
112 static noit_hash_table _compiled_fallback = NOIT_HASH_EMPTY;
113 static struct {
114   const char *key;
115   const char *val;
116 } config_info[] = {
117   /*
118    * These are compile-time fallbacks to be used in the event
119    * that the current running config does not have values for
120    * these config paths.
121    *
122    * PLEASE: keep them alphabetically sorted.
123    */
124   { "/%s/eventer/@implementation", DEFAULT_EVENTER },
125   { "/%s/modules/@directory", MODULES_DIR },
126
127   { NULL, NULL }
128 };
129
130 void noit_conf_xml_error_func(void *ctx, const char *format, ...) {
131   struct timeval __now;
132   noit_log_stream_t ls = ctx;
133   va_list arg;
134   if(!ls) return;
135   va_start(arg, format);
136   gettimeofday(&__now,  NULL);
137   noit_vlog(ls, &__now, __FILE__, __LINE__, format, arg);
138   va_end(arg);
139 }
140 void noit_conf_xml_error_ext_func(void *ctx, xmlErrorPtr err) {
141   struct timeval __now;
142   noit_log_stream_t ls = ctx;
143   if(!ls) return;
144   gettimeofday(&__now,  NULL);
145   if(err->file)
146     noit_log(ls, &__now, err->file, err->line,
147              "XML error [%d/%d] in %s on line %d %s\n",
148              err->domain, err->code, err->file, err->line, err->message);
149   else
150     noit_log(ls, &__now, err->file, err->line,
151              "XML error [%d/%d] %s\n",
152              err->domain, err->code, err->message);
153 }
154 void noit_conf_init(const char *toplevel) {
155   int i;
156   char keystr[256];
157   xmlSetGenericErrorFunc(noit_error, noit_conf_xml_error_func);
158   xmlSetStructuredErrorFunc(noit_error, noit_conf_xml_error_ext_func);
159   for(i = 0; config_info[i].key != NULL; i++) {
160     snprintf(keystr, sizeof(keystr), config_info[i].key, toplevel);
161     noit_hash_store(&_compiled_fallback,
162                     strdup(keystr), strlen(keystr),
163                     (void *)strdup(config_info[i].val));
164   }
165   xmlKeepBlanksDefault(0);
166   xmlInitParser();
167   xmlXPathInit();
168 }
169
170 int noit_conf_load(const char *path) {
171   xmlDocPtr new_config;
172   new_config = xmlParseFile(path);
173   if(new_config) {
174     if(master_config) xmlFreeDoc(master_config);
175     if(xpath_ctxt) xmlXPathFreeContext(xpath_ctxt);
176
177     master_config = new_config;
178     xpath_ctxt = xmlXPathNewContext(master_config);
179     if(path != master_config_file)
180       if(realpath(path, master_config_file) == NULL)
181         noitL(noit_error, "realpath failed: %s\n", strerror(errno));
182     noit_conf_mark_changed();
183     return 0;
184   }
185   return -1;
186 }
187
188 char *noit_conf_config_filename() {
189   return strdup(master_config_file);
190 }
191
192 int noit_conf_xml_xpath(xmlDocPtr *mc, xmlXPathContextPtr *xp) {
193   if(mc) *mc = master_config;
194   if(xp) *xp = xpath_ctxt;
195   return 0;
196 }
197 int noit_conf_save(const char *path) {
198   return -1;
199 }
200
201 void noit_conf_get_elements_into_hash(noit_conf_section_t section,
202                                       const char *path,
203                                       noit_hash_table *table) {
204   int i, cnt;
205   xmlXPathObjectPtr pobj = NULL;
206   xmlXPathContextPtr current_ctxt;
207   xmlNodePtr current_node = (xmlNodePtr)section;
208   xmlNodePtr node;
209
210   current_ctxt = xpath_ctxt;
211   if(current_node) {
212     current_ctxt = xmlXPathNewContext(master_config);
213     current_ctxt->node = current_node;
214   }
215   pobj = xmlXPathEval((xmlChar *)path, current_ctxt);
216   if(!pobj) goto out;
217   if(pobj->type != XPATH_NODESET) goto out;
218   if(xmlXPathNodeSetIsEmpty(pobj->nodesetval)) goto out;
219   cnt = xmlXPathNodeSetGetLength(pobj->nodesetval);
220   for(i=0; i<cnt; i++) {
221     char *value;
222     node = xmlXPathNodeSetItem(pobj->nodesetval, i);
223     value = (char *)xmlXPathCastNodeToString(node);
224     noit_hash_replace(table,
225                       strdup((char *)node->name), strlen((char *)node->name),
226                       strdup(value), free, free);
227     xmlFree(value);
228   }
229  out:
230   if(pobj) xmlXPathFreeObject(pobj);
231   if(current_ctxt && current_ctxt != xpath_ctxt)
232     xmlXPathFreeContext(current_ctxt);
233 }
234 void noit_conf_get_into_hash(noit_conf_section_t section,
235                              const char *path,
236                              noit_hash_table *table) {
237   int cnt;
238   xmlXPathObjectPtr pobj = NULL;
239   xmlXPathContextPtr current_ctxt;
240   xmlNodePtr current_node = (xmlNodePtr)section;
241   xmlNodePtr node, parent_node;
242   char xpath_expr[1024];
243   char *inheritid;
244
245   current_ctxt = xpath_ctxt;
246   if(current_node) {
247     current_ctxt = xmlXPathNewContext(master_config);
248     current_ctxt->node = current_node;
249   }
250   if(path[0] == '/')
251     strlcpy(xpath_expr, path, sizeof(xpath_expr));
252   else
253     snprintf(xpath_expr, sizeof(xpath_expr),
254              "ancestor-or-self::node()/%s", path);
255   pobj = xmlXPathEval((xmlChar *)xpath_expr, current_ctxt);
256   if(!pobj) goto out;
257   if(pobj->type != XPATH_NODESET) goto out;
258   if(xmlXPathNodeSetIsEmpty(pobj->nodesetval)) goto out;
259   cnt = xmlXPathNodeSetGetLength(pobj->nodesetval);
260   /* These are in the order of root to leaf
261    * We want to recurse... apply:
262    *   1. our parent's config
263    *   2. our "inherit" config if it exists.
264    *   3. our config.
265    */
266   node = xmlXPathNodeSetItem(pobj->nodesetval, cnt-1);
267   /* 1. */
268   if(cnt > 1) {
269     parent_node = xmlXPathNodeSetItem(pobj->nodesetval, cnt-2);
270     if(parent_node != current_node)
271       noit_conf_get_into_hash(parent_node, (const char *)node->name, table);
272   }
273   /* 2. */
274   inheritid = (char *)xmlGetProp(node, (xmlChar *)"inherit");
275   if(inheritid) {
276     snprintf(xpath_expr, sizeof(xpath_expr), "//*[@id=\"%s\"]", inheritid);
277     noit_conf_get_into_hash(NULL, xpath_expr, table);
278   }
279   /* 3. */
280   noit_conf_get_elements_into_hash(node, "*", table);
281
282  out:
283   if(pobj) xmlXPathFreeObject(pobj);
284   if(current_ctxt && current_ctxt != xpath_ctxt)
285     xmlXPathFreeContext(current_ctxt);
286 }
287 noit_hash_table *noit_conf_get_hash(noit_conf_section_t section,
288                                     const char *path) {
289   noit_hash_table *table = NULL;
290
291   table = calloc(1, sizeof(*table));
292   noit_conf_get_into_hash(section, path, table);
293   return table;
294 }
295 noit_conf_section_t noit_conf_get_section(noit_conf_section_t section,
296                                           const char *path) {
297   noit_conf_section_t subsection = NULL;
298   xmlXPathObjectPtr pobj = NULL;
299   xmlXPathContextPtr current_ctxt;
300   xmlNodePtr current_node = (xmlNodePtr)section;
301
302   current_ctxt = xpath_ctxt;
303   if(current_node) {
304     current_ctxt = xmlXPathNewContext(master_config);
305     current_ctxt->node = current_node;
306   }
307   pobj = xmlXPathEval((xmlChar *)path, current_ctxt);
308   if(!pobj) goto out;
309   if(pobj->type != XPATH_NODESET) goto out;
310   if(xmlXPathNodeSetIsEmpty(pobj->nodesetval)) goto out;
311   subsection = (noit_conf_section_t)xmlXPathNodeSetItem(pobj->nodesetval, 0);
312  out:
313   if(pobj) xmlXPathFreeObject(pobj);
314   if(current_ctxt && current_ctxt != xpath_ctxt)
315     xmlXPathFreeContext(current_ctxt);
316   return subsection;
317 }
318 noit_conf_section_t *noit_conf_get_sections(noit_conf_section_t section,
319                                             const char *path,
320                                             int *cnt) {
321   int i;
322   noit_conf_section_t *sections = NULL;
323   xmlXPathObjectPtr pobj = NULL;
324   xmlXPathContextPtr current_ctxt;
325   xmlNodePtr current_node = (xmlNodePtr)section;
326
327   *cnt = 0;
328   current_ctxt = xpath_ctxt;
329   if(current_node) {
330     current_ctxt = xmlXPathNewContext(master_config);
331     current_ctxt->node = current_node;
332   }
333   pobj = xmlXPathEval((xmlChar *)path, current_ctxt);
334   if(!pobj) goto out;
335   if(pobj->type != XPATH_NODESET) goto out;
336   if(xmlXPathNodeSetIsEmpty(pobj->nodesetval)) goto out;
337   *cnt = xmlXPathNodeSetGetLength(pobj->nodesetval);
338   sections = calloc(*cnt, sizeof(*sections));
339   for(i=0; i<*cnt; i++)
340     sections[i] = (noit_conf_section_t)xmlXPathNodeSetItem(pobj->nodesetval, i);
341  out:
342   if(pobj) xmlXPathFreeObject(pobj);
343   if(current_ctxt && current_ctxt != xpath_ctxt)
344     xmlXPathFreeContext(current_ctxt);
345   return sections;
346 }
347 int _noit_conf_get_string(noit_conf_section_t section, xmlNodePtr *vnode,
348                           const char *path, char **value) {
349   const char *str;
350   int i, rv = 1;
351   xmlXPathObjectPtr pobj = NULL;
352   xmlXPathContextPtr current_ctxt;
353   xmlNodePtr current_node = (xmlNodePtr)section;
354
355   current_ctxt = xpath_ctxt;
356   if(current_node) {
357     current_ctxt = xmlXPathNewContext(master_config);
358     current_ctxt->node = current_node;
359   }
360   pobj = xmlXPathEval((xmlChar *)path, current_ctxt);
361   if(pobj) {
362     xmlNodePtr node;
363     switch(pobj->type) {
364       case XPATH_NODESET:
365         if(xmlXPathNodeSetIsEmpty(pobj->nodesetval)) goto fallback;
366         i = xmlXPathNodeSetGetLength(pobj->nodesetval);
367         node = xmlXPathNodeSetItem(pobj->nodesetval, i-1);
368         if(vnode) *vnode = node;
369         *value = (char *)xmlXPathCastNodeToString(node);
370         break;
371       default:
372         *value = (char *)xmlXPathCastToString(pobj);
373     }
374     goto found;
375   }
376  fallback:
377   if(noit_hash_retr_str(&_compiled_fallback,
378                         path, strlen(path), &str)) {
379     *value = (char *)xmlStrdup((xmlChar *)str);
380     goto found;
381   }
382   rv = 0;
383  found:
384   if(pobj) xmlXPathFreeObject(pobj);
385   if(current_ctxt && current_ctxt != xpath_ctxt)
386     xmlXPathFreeContext(current_ctxt);
387   return rv;
388 }
389 int noit_conf_get_uuid(noit_conf_section_t section,
390                        const char *path, uuid_t out) {
391   char *str;
392   if(_noit_conf_get_string(section,NULL,path,&str)) {
393     if(uuid_parse(str, out) == 0) return 1;
394     return 0;
395   }
396   return 0;
397 }
398 int noit_conf_get_string(noit_conf_section_t section,
399                          const char *path, char **value) {
400   char *str;
401   if(_noit_conf_get_string(section,NULL,path,&str)) {
402     *value = strdup(str);
403     xmlFree(str);
404     return 1;
405   }
406   return 0;
407 }
408 int noit_conf_get_stringbuf(noit_conf_section_t section,
409                             const char *path, char *buf, int len) {
410   char *str;
411   if(_noit_conf_get_string(section,NULL,path,&str)) {
412     strlcpy(buf, str, len);
413     xmlFree(str);
414     return 1;
415   }
416   return 0;
417 }
418 int noit_conf_set_string(noit_conf_section_t section,
419                          const char *path, const char *value) {
420   noit_hash_replace(&_tmp_config,
421                     strdup(path), strlen(path), (void *)strdup(value),
422                     free, free);
423   return 1;
424 }
425 int noit_conf_get_int(noit_conf_section_t section,
426                       const char *path, int *value) {
427   char *str;
428   long longval;
429   if(_noit_conf_get_string(section,NULL,path,&str)) {
430     int base = 10;
431     if(str[0] == '0') {
432       if(str[1] == 'x') base = 16;
433       else base = 8;
434     }
435     longval = strtol(str, NULL, base);
436     xmlFree(str);
437     *value = (int)longval;
438     return 1;
439   }
440   return 0;
441 }
442 int noit_conf_set_int(noit_conf_section_t section,
443                       const char *path, int value) {
444   char buffer[32];
445   snprintf(buffer, 32, "%d", value);
446   return noit_conf_set_string(section,path,buffer);
447 }
448 int noit_conf_get_float(noit_conf_section_t section,
449                         const char *path, float *value) {
450   char *str;
451   if(_noit_conf_get_string(section,NULL,path,&str)) {
452     *value = atof(str);
453     xmlFree(str);
454     return 1;
455   }
456   return 0;
457 }
458 int noit_conf_set_float(noit_conf_section_t section,
459                         const char *path, float value) {
460   char buffer[32];
461   snprintf(buffer, 32, "%f", value);
462   return noit_conf_set_string(section,path,buffer);
463 }
464 int noit_conf_get_boolean(noit_conf_section_t section,
465                           const char *path, noit_boolean *value) {
466   char *str;
467   if(_noit_conf_get_string(section,NULL,path,&str)) {
468     if(!strcasecmp(str, "true") ||
469        !strcasecmp(str, "on")) *value = noit_true;
470     else *value = noit_false;
471     xmlFree(str);
472     return 1;
473   }
474   return 0;
475 }
476 int noit_conf_set_boolean(noit_conf_section_t section,
477                           const char *path, noit_boolean value) {
478   if(value == noit_true)
479     return noit_conf_set_string(section,path,"true");
480   return noit_conf_set_string(section,path,"false");
481 }
482
483 struct config_line_vstr {
484   char *buff;
485   int raw_len;
486   int len;
487   int allocd;
488   enum { CONFIG_RAW = 0, CONFIG_COMPRESSED, CONFIG_B64 } target, encoded;
489 };
490 static int
491 noit_config_log_write_xml(void *vstr, const char *buffer, int len) {
492   struct config_line_vstr *clv = vstr;
493   assert(clv->encoded == CONFIG_RAW);
494   if(!clv->buff) {
495     clv->allocd = 8192;
496     clv->buff = malloc(clv->allocd);
497   }
498   while(len + clv->len > clv->allocd) {
499     char *newbuff;
500     int newsize = clv->allocd;
501     newsize <<= 1;
502     newbuff = realloc(clv->buff, newsize);
503     if(!newbuff) {
504       return -1;
505     }
506     clv->allocd = newsize;
507     clv->buff = newbuff;
508   }
509   memcpy(clv->buff + clv->len, buffer, len);
510   clv->len += len;
511   return len;
512 }
513 static int
514 noit_config_log_close_xml(void *vstr) {
515   struct config_line_vstr *clv = vstr;
516   uLong initial_dlen, dlen;
517   char *compbuff, *b64buff;
518
519   if(clv->buff == NULL) {
520     clv->encoded = clv->target;
521     return 0;
522   }
523   clv->raw_len = clv->len;
524   assert(clv->encoded == CONFIG_RAW);
525   if(clv->encoded == clv->target) return 0;
526
527   /* Compress */
528   initial_dlen = dlen = compressBound(clv->len);
529   compbuff = malloc(initial_dlen);
530   if(!compbuff) return -1;
531   if(Z_OK != compress2((Bytef *)compbuff, &dlen,
532                        (Bytef *)clv->buff, clv->len, 9)) {
533     noitL(noit_error, "Error compressing config for transmission.\n");
534     free(compbuff);
535     return -1;
536   }
537   free(clv->buff);
538   clv->buff = compbuff;
539   clv->allocd = initial_dlen;
540   clv->len = dlen;
541   clv->encoded = CONFIG_COMPRESSED;
542   if(clv->encoded == clv->target) return 0;
543
544   /* Encode */
545   initial_dlen = ((clv->len + 2) / 3) * 4;
546   b64buff = malloc(initial_dlen);
547   dlen = noit_b64_encode((unsigned char *)clv->buff, clv->len,
548                          b64buff, initial_dlen);
549   if(dlen == 0) {
550     free(b64buff);
551     return -1;
552   }
553   free(clv->buff);
554   clv->buff = b64buff;
555   clv->allocd = initial_dlen;
556   clv->len = dlen;
557   clv->encoded = CONFIG_B64;
558   if(clv->encoded == clv->target) return 0;
559   return -1;
560 }
561
562 int
563 noit_conf_reload(noit_console_closure_t ncct,
564                  int argc, char **argv,
565                  noit_console_state_t *state, void *closure) {
566   if(noit_conf_load(master_config_file)) {
567     nc_printf(ncct, "error loading config\n");
568     return -1;
569   }
570   return 0;
571 }
572 int
573 noit_conf_write_terminal(noit_console_closure_t ncct,
574                          int argc, char **argv,
575                          noit_console_state_t *state, void *closure) {
576   xmlOutputBufferPtr out;
577   xmlCharEncodingHandlerPtr enc;
578   enc = xmlGetCharEncodingHandler(XML_CHAR_ENCODING_UTF8);
579   out = xmlOutputBufferCreateIO(noit_console_write_xml,
580                                 noit_console_close_xml,
581                                 ncct, enc);
582   xmlSaveFormatFileTo(out, master_config, "utf8", 1);
583   return 0;
584 }
585 int
586 noit_conf_write_file(noit_console_closure_t ncct,
587                      int argc, char **argv,
588                      noit_console_state_t *state, void *closure) {
589   int fd, len;
590   char master_file_tmp[PATH_MAX];
591   xmlOutputBufferPtr out;
592   xmlCharEncodingHandlerPtr enc;
593
594   snprintf(master_file_tmp, sizeof(master_file_tmp),
595            "%s.tmp", master_config_file);
596   unlink(master_file_tmp);
597   fd = open(master_file_tmp, O_CREAT|O_EXCL|O_WRONLY, 0640);
598   if(fd < 0) {
599     nc_printf(ncct, "Failed to open tmp file: %s\n", strerror(errno));
600     return -1;
601   }
602   enc = xmlGetCharEncodingHandler(XML_CHAR_ENCODING_UTF8);
603   out = xmlOutputBufferCreateFd(fd, enc);
604   if(!out) {
605     close(fd);
606     unlink(master_file_tmp);
607     nc_printf(ncct, "internal error: OutputBufferCreate failed\n");
608     return -1;
609   }
610   len = xmlSaveFormatFileTo(out, master_config, "utf8", 1);
611   close(fd);
612   if(len <= 0) {
613     nc_printf(ncct, "internal error: writing to tmp file failed.\n");
614     return -1;
615   }
616   if(rename(master_file_tmp, master_config_file) != 0) {
617     nc_printf(ncct, "Failed to replace file: %s\n", strerror(errno));
618     return -1;
619   }
620   nc_printf(ncct, "%d bytes written.\n", len);
621   return 0;
622 }
623 char *
624 noit_conf_xml_in_mem(size_t *len) {
625   struct config_line_vstr *clv;
626   xmlOutputBufferPtr out;
627   xmlCharEncodingHandlerPtr enc;
628   char *rv;
629
630   clv = calloc(1, sizeof(*clv));
631   clv->target = CONFIG_RAW;
632   enc = xmlGetCharEncodingHandler(XML_CHAR_ENCODING_UTF8);
633   out = xmlOutputBufferCreateIO(noit_config_log_write_xml,
634                                 noit_config_log_close_xml,
635                                 clv, enc);
636   xmlSaveFormatFileTo(out, master_config, "utf8", 1);
637   if(clv->encoded != CONFIG_RAW) {
638     noitL(noit_error, "Error logging configuration\n");
639     if(clv->buff) free(clv->buff);
640     free(clv);
641     return NULL;
642   }
643   rv = clv->buff;
644   *len = clv->len;
645   free(clv);
646   return rv;
647 }
648
649 int
650 noit_conf_write_log() {
651   static u_int32_t last_write_gen = 0;
652   static noit_log_stream_t config_log = NULL;
653   struct timeval __now;
654   xmlOutputBufferPtr out;
655   xmlCharEncodingHandlerPtr enc;
656   struct config_line_vstr *clv;
657   SETUP_LOG(config, return -1);
658
659   /* We know we haven't changed */
660   if(last_write_gen == __config_gen) return 0;
661
662   gettimeofday(&__now, NULL);
663   clv = calloc(1, sizeof(*clv));
664   clv->target = CONFIG_B64;
665   enc = xmlGetCharEncodingHandler(XML_CHAR_ENCODING_UTF8);
666   out = xmlOutputBufferCreateIO(noit_config_log_write_xml,
667                                 noit_config_log_close_xml,
668                                 clv, enc);
669   xmlSaveFormatFileTo(out, master_config, "utf8", 1);
670   if(clv->encoded != CONFIG_B64) {
671     noitL(noit_error, "Error logging configuration\n");
672     if(clv->buff) free(clv->buff);
673     free(clv);
674     return -1;
675   }
676   noitL(config_log, "n\t%lu.%03lu\t%d\t%.*s\n",
677         __now.tv_sec, __now.tv_usec / 1000UL, clv->raw_len,
678         clv->len, clv->buff);
679   free(clv->buff);
680   free(clv);
681   last_write_gen = __config_gen;
682   return 0;
683 }
684
685 void
686 noit_conf_log_init(const char *toplevel) {
687   int i, cnt = 0, o, ocnt = 0;
688   noit_conf_section_t *log_configs, *outlets;
689   char path[256];
690
691   snprintf(path, sizeof(path), "/%s/logs//log", toplevel);
692   log_configs = noit_conf_get_sections(NULL, path, &cnt);
693   noitL(noit_stderr, "Found %d %s stanzas\n", cnt, path);
694   for(i=0; i<cnt; i++) {
695     noit_log_stream_t ls;
696     char name[256], type[256], path[256];
697     noit_hash_table *config;
698     noit_boolean disabled;
699     noit_boolean debug;
700
701     if(!noit_conf_get_stringbuf(log_configs[i],
702                                 "ancestor-or-self::node()/@name",
703                                 name, sizeof(name))) {
704       noitL(noit_error, "log section %d does not have a name attribute\n", i+1);
705       exit(-1);
706     }
707     if(!noit_conf_get_stringbuf(log_configs[i],
708                                 "ancestor-or-self::node()/@type",
709                                 type, sizeof(type))) {
710       type[0] = '\0';
711     }
712     if(!noit_conf_get_stringbuf(log_configs[i],
713                                 "ancestor-or-self::node()/@path",
714                                 path, sizeof(path))) {
715       path[0] = '\0';
716     }
717     config = noit_conf_get_hash(log_configs[i],
718                                 "ancestor-or-self::node()/config/*");
719     ls = noit_log_stream_new(name, type[0] ? type : NULL,
720                              path[0] ? path : NULL, NULL, config);
721     if(!ls) {
722       fprintf(stderr, "Error configuring log: %s[%s:%s]\n", name, type, path);
723       exit(-1);
724     }
725
726     if(noit_conf_get_boolean(log_configs[i],
727                              "ancestor-or-self::node()/@disabled",
728                              &disabled) && disabled)
729       ls->enabled = 0;
730      
731     if(noit_conf_get_boolean(log_configs[i],
732                              "ancestor-or-self::node()/@debug",
733                              &debug) && debug)
734       ls->debug = 1;
735      
736     outlets = noit_conf_get_sections(log_configs[i],
737                                      "ancestor-or-self::node()/outlet", &ocnt);
738     noitL(noit_debug, "Found %d outlets for log '%s'\n", ocnt, name);
739
740     for(o=0; o<ocnt; o++) {
741       noit_log_stream_t outlet;
742       char oname[256];
743       noit_conf_get_stringbuf(outlets[o], "@name",
744                               oname, sizeof(oname));
745       outlet = noit_log_stream_find(oname);
746       if(!outlet) {
747         fprintf(stderr, "Cannot find outlet '%s' for %s[%s:%s]\n", oname,
748               name, type, path);
749         exit(-1);
750       }
751       else
752         noit_log_stream_add_stream(ls, outlet);
753     }
754     if(outlets) free(outlets);
755   }
756   if(log_configs) free(log_configs);
757 }
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