root/src/noit_conf.c

Revision 4c742f5a48b89dbb6fbca6cccb394f8ee2e65654, 22.0 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 6 years ago)

cleanups refs #42

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