1 /**
2 * collectd - src/configfile.c
3 * Copyright (C) 2005-2010 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 * Sebastian tokkee Harl <sh at tokkee.org>
22 **/
24 #include "collectd.h"
26 #include "liboconfig/oconfig.h"
28 #include "common.h"
29 #include "plugin.h"
30 #include "configfile.h"
31 #include "types_list.h"
32 #include "filter_chain.h"
34 #if HAVE_WORDEXP_H
35 # include <wordexp.h>
36 #endif /* HAVE_WORDEXP_H */
38 #define ESCAPE_NULL(str) ((str) == NULL ? "(null)" : (str))
40 /*
41 * Private types
42 */
43 typedef struct cf_callback
44 {
45 const char *type;
46 int (*callback) (const char *, const char *);
47 const char **keys;
48 int keys_num;
49 struct cf_callback *next;
50 } cf_callback_t;
52 typedef struct cf_complex_callback_s
53 {
54 char *type;
55 int (*callback) (oconfig_item_t *);
56 struct cf_complex_callback_s *next;
57 } cf_complex_callback_t;
59 typedef struct cf_value_map_s
60 {
61 char *key;
62 int (*func) (const oconfig_item_t *);
63 } cf_value_map_t;
65 typedef struct cf_global_option_s
66 {
67 char *key;
68 char *value;
69 char *def;
70 } cf_global_option_t;
72 /*
73 * Prototypes of callback functions
74 */
75 static int dispatch_value_typesdb (const oconfig_item_t *ci);
76 static int dispatch_value_plugindir (const oconfig_item_t *ci);
77 static int dispatch_loadplugin (const oconfig_item_t *ci);
79 /*
80 * Private variables
81 */
82 static cf_callback_t *first_callback = NULL;
83 static cf_complex_callback_t *complex_callback_head = NULL;
85 static cf_value_map_t cf_value_map[] =
86 {
87 {"TypesDB", dispatch_value_typesdb},
88 {"PluginDir", dispatch_value_plugindir},
89 {"LoadPlugin", dispatch_loadplugin}
90 };
91 static int cf_value_map_num = STATIC_ARRAY_LEN (cf_value_map);
93 static cf_global_option_t cf_global_options[] =
94 {
95 {"BaseDir", NULL, PKGLOCALSTATEDIR},
96 {"PIDFile", NULL, PIDFILE},
97 {"Hostname", NULL, NULL},
98 {"FQDNLookup", NULL, "true"},
99 {"Interval", NULL, "10"},
100 {"ReadThreads", NULL, "5"},
101 {"Timeout", NULL, "2"},
102 {"PreCacheChain", NULL, "PreCache"},
103 {"PostCacheChain", NULL, "PostCache"}
104 };
105 static int cf_global_options_num = STATIC_ARRAY_LEN (cf_global_options);
107 static int cf_default_typesdb = 1;
109 /*
110 * Functions to handle register/unregister, search, and other plugin related
111 * stuff
112 */
113 static cf_callback_t *cf_search (const char *type)
114 {
115 cf_callback_t *cf_cb;
117 if (type == NULL)
118 return (NULL);
120 for (cf_cb = first_callback; cf_cb != NULL; cf_cb = cf_cb->next)
121 if (strcasecmp (cf_cb->type, type) == 0)
122 break;
124 return (cf_cb);
125 }
127 static int cf_dispatch (const char *type, const char *orig_key,
128 const char *orig_value)
129 {
130 cf_callback_t *cf_cb;
131 char *key;
132 char *value;
133 int ret;
134 int i;
136 DEBUG ("type = %s, key = %s, value = %s",
137 ESCAPE_NULL(type),
138 ESCAPE_NULL(orig_key),
139 ESCAPE_NULL(orig_value));
141 if ((cf_cb = cf_search (type)) == NULL)
142 {
143 WARNING ("Found a configuration for the `%s' plugin, but "
144 "the plugin isn't loaded or didn't register "
145 "a configuration callback.", type);
146 return (-1);
147 }
149 if ((key = strdup (orig_key)) == NULL)
150 return (1);
151 if ((value = strdup (orig_value)) == NULL)
152 {
153 free (key);
154 return (2);
155 }
157 ret = -1;
159 for (i = 0; i < cf_cb->keys_num; i++)
160 {
161 if ((cf_cb->keys[i] != NULL)
162 && (strcasecmp (cf_cb->keys[i], key) == 0))
163 {
164 ret = (*cf_cb->callback) (key, value);
165 break;
166 }
167 }
169 if (i >= cf_cb->keys_num)
170 WARNING ("Plugin `%s' did not register for value `%s'.", type, key);
172 free (key);
173 free (value);
175 DEBUG ("cf_dispatch: return (%i)", ret);
177 return (ret);
178 } /* int cf_dispatch */
180 static int dispatch_global_option (const oconfig_item_t *ci)
181 {
182 if (ci->values_num != 1)
183 return (-1);
184 if (ci->values[0].type == OCONFIG_TYPE_STRING)
185 return (global_option_set (ci->key, ci->values[0].value.string));
186 else if (ci->values[0].type == OCONFIG_TYPE_NUMBER)
187 {
188 char tmp[128];
189 ssnprintf (tmp, sizeof (tmp), "%lf", ci->values[0].value.number);
190 return (global_option_set (ci->key, tmp));
191 }
192 else if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
193 {
194 if (ci->values[0].value.boolean)
195 return (global_option_set (ci->key, "true"));
196 else
197 return (global_option_set (ci->key, "false"));
198 }
200 return (-1);
201 } /* int dispatch_global_option */
203 static int dispatch_value_typesdb (const oconfig_item_t *ci)
204 {
205 int i = 0;
207 assert (strcasecmp (ci->key, "TypesDB") == 0);
209 cf_default_typesdb = 0;
211 if (ci->values_num < 1) {
212 ERROR ("configfile: `TypesDB' needs at least one argument.");
213 return (-1);
214 }
216 for (i = 0; i < ci->values_num; ++i)
217 {
218 if (OCONFIG_TYPE_STRING != ci->values[i].type) {
219 WARNING ("configfile: TypesDB: Skipping %i. argument which "
220 "is not a string.", i + 1);
221 continue;
222 }
224 read_types_list (ci->values[i].value.string);
225 }
226 return (0);
227 } /* int dispatch_value_typesdb */
229 static int dispatch_value_plugindir (const oconfig_item_t *ci)
230 {
231 assert (strcasecmp (ci->key, "PluginDir") == 0);
233 if (ci->values_num != 1)
234 return (-1);
235 if (ci->values[0].type != OCONFIG_TYPE_STRING)
236 return (-1);
238 plugin_set_dir (ci->values[0].value.string);
239 return (0);
240 }
242 static int dispatch_loadplugin (const oconfig_item_t *ci)
243 {
244 int i;
245 uint32_t flags = 0;
246 assert (strcasecmp (ci->key, "LoadPlugin") == 0);
248 if (ci->values_num != 1)
249 return (-1);
250 if (ci->values[0].type != OCONFIG_TYPE_STRING)
251 return (-1);
253 for (i = 0; i < ci->children_num; ++i) {
254 if (ci->children[i].values_num != 1 ||
255 ci->children[i].values[0].type != OCONFIG_TYPE_BOOLEAN) {
256 WARNING("Ignoring unknown LoadPlugin option %s for plugin %s", ci->children[i].key, ci->values[0].value.string);
257 continue;
258 }
259 if (strcasecmp(ci->children[i].key, "globals") == 0) {
260 flags |= PLUGIN_FLAGS_GLOBAL;
261 } else {
262 WARNING("Ignoring unknown LoadPlugin option %s for plugin %s", ci->children[i].key, ci->values[0].value.string);
263 }
264 }
265 return (plugin_load (ci->values[0].value.string, flags));
266 } /* int dispatch_value_loadplugin */
268 static int dispatch_value_plugin (const char *plugin, oconfig_item_t *ci)
269 {
270 char buffer[4096];
271 char *buffer_ptr;
272 int buffer_free;
273 int i;
275 buffer_ptr = buffer;
276 buffer_free = sizeof (buffer);
278 for (i = 0; i < ci->values_num; i++)
279 {
280 int status = -1;
282 if (ci->values[i].type == OCONFIG_TYPE_STRING)
283 status = ssnprintf (buffer_ptr, buffer_free, " %s",
284 ci->values[i].value.string);
285 else if (ci->values[i].type == OCONFIG_TYPE_NUMBER)
286 status = ssnprintf (buffer_ptr, buffer_free, " %lf",
287 ci->values[i].value.number);
288 else if (ci->values[i].type == OCONFIG_TYPE_BOOLEAN)
289 status = ssnprintf (buffer_ptr, buffer_free, " %s",
290 ci->values[i].value.boolean
291 ? "true" : "false");
293 if ((status < 0) || (status >= buffer_free))
294 return (-1);
295 buffer_free -= status;
296 buffer_ptr += status;
297 }
298 /* skip the initial space */
299 buffer_ptr = buffer + 1;
301 return (cf_dispatch (plugin, ci->key, buffer_ptr));
302 } /* int dispatch_value_plugin */
304 static int dispatch_value (const oconfig_item_t *ci)
305 {
306 int ret = -2;
307 int i;
309 for (i = 0; i < cf_value_map_num; i++)
310 if (strcasecmp (cf_value_map[i].key, ci->key) == 0)
311 {
312 ret = cf_value_map[i].func (ci);
313 break;
314 }
316 for (i = 0; i < cf_global_options_num; i++)
317 if (strcasecmp (cf_global_options[i].key, ci->key) == 0)
318 {
319 ret = dispatch_global_option (ci);
320 break;
321 }
323 return (ret);
324 } /* int dispatch_value */
326 static int dispatch_block_plugin (oconfig_item_t *ci)
327 {
328 int i;
329 char *name;
331 cf_complex_callback_t *cb;
333 if (strcasecmp (ci->key, "Plugin") != 0)
334 return (-1);
335 if (ci->values_num < 1)
336 return (-1);
337 if (ci->values[0].type != OCONFIG_TYPE_STRING)
338 return (-1);
340 name = ci->values[0].value.string;
342 /* Check for a complex callback first */
343 for (cb = complex_callback_head; cb != NULL; cb = cb->next)
344 if (strcasecmp (name, cb->type) == 0)
345 return (cb->callback (ci));
347 /* Hm, no complex plugin found. Dispatch the values one by one */
348 for (i = 0; i < ci->children_num; i++)
349 {
350 if (ci->children[i].children == NULL)
351 dispatch_value_plugin (name, ci->children + i);
352 else
353 {
354 WARNING ("There is a `%s' block within the "
355 "configuration for the %s plugin. "
356 "The plugin either only expects "
357 "\"simple\" configuration statements "
358 "or wasn't loaded using `LoadPlugin'."
359 " Please check your configuration.",
360 ci->children[i].key, name);
361 }
362 }
364 return (0);
365 }
368 static int dispatch_block (oconfig_item_t *ci)
369 {
370 if (strcasecmp (ci->key, "LoadPlugin") == 0)
371 return (dispatch_loadplugin (ci));
372 else if (strcasecmp (ci->key, "Plugin") == 0)
373 return (dispatch_block_plugin (ci));
374 else if (strcasecmp (ci->key, "Chain") == 0)
375 return (fc_configure (ci));
377 return (0);
378 }
380 static int cf_ci_replace_child (oconfig_item_t *dst, oconfig_item_t *src,
381 int offset)
382 {
383 oconfig_item_t *temp;
384 int i;
386 assert (offset >= 0);
387 assert (dst->children_num > offset);
389 /* Free the memory used by the replaced child. Usually that's the
390 * `Include "blah"' statement. */
391 temp = dst->children + offset;
392 for (i = 0; i < temp->values_num; i++)
393 {
394 if (temp->values[i].type == OCONFIG_TYPE_STRING)
395 {
396 sfree (temp->values[i].value.string);
397 }
398 }
399 sfree (temp->values);
400 temp = NULL;
402 /* If (src->children_num == 0) the array size is decreased. If offset
403 * is _not_ the last element, (offset < (dst->children_num - 1)), then
404 * we need to move the trailing elements before resizing the array. */
405 if ((src->children_num == 0) && (offset < (dst->children_num - 1)))
406 {
407 int nmemb = dst->children_num - (offset + 1);
408 memmove (dst->children + offset, dst->children + offset + 1,
409 sizeof (oconfig_item_t) * nmemb);
410 }
412 /* Resize the memory containing the children to be big enough to hold
413 * all children. */
414 temp = (oconfig_item_t *) realloc (dst->children,
415 sizeof (oconfig_item_t)
416 * (dst->children_num + src->children_num - 1));
417 if (temp == NULL)
418 {
419 ERROR ("configfile: realloc failed.");
420 return (-1);
421 }
422 dst->children = temp;
424 /* If there are children behind the include statement, and they have
425 * not yet been moved because (src->children_num == 0), then move them
426 * to the end of the list, so that the new children have room before
427 * them. */
428 if ((src->children_num > 0)
429 && ((dst->children_num - (offset + 1)) > 0))
430 {
431 int nmemb = dst->children_num - (offset + 1);
432 int old_offset = offset + 1;
433 int new_offset = offset + src->children_num;
435 memmove (dst->children + new_offset,
436 dst->children + old_offset,
437 sizeof (oconfig_item_t) * nmemb);
438 }
440 /* Last but not least: If there are new children, copy them to the
441 * memory reserved for them. */
442 if (src->children_num > 0)
443 {
444 memcpy (dst->children + offset,
445 src->children,
446 sizeof (oconfig_item_t) * src->children_num);
447 }
449 /* Update the number of children. */
450 dst->children_num += (src->children_num - 1);
452 return (0);
453 } /* int cf_ci_replace_child */
455 static int cf_ci_append_children (oconfig_item_t *dst, oconfig_item_t *src)
456 {
457 oconfig_item_t *temp;
459 if ((src == NULL) || (src->children_num == 0))
460 return (0);
462 temp = (oconfig_item_t *) realloc (dst->children,
463 sizeof (oconfig_item_t)
464 * (dst->children_num + src->children_num));
465 if (temp == NULL)
466 {
467 ERROR ("configfile: realloc failed.");
468 return (-1);
469 }
470 dst->children = temp;
472 memcpy (dst->children + dst->children_num,
473 src->children,
474 sizeof (oconfig_item_t)
475 * src->children_num);
476 dst->children_num += src->children_num;
478 return (0);
479 } /* int cf_ci_append_children */
481 #define CF_MAX_DEPTH 8
482 static oconfig_item_t *cf_read_generic (const char *path, int depth);
484 static int cf_include_all (oconfig_item_t *root, int depth)
485 {
486 int i;
488 for (i = 0; i < root->children_num; i++)
489 {
490 oconfig_item_t *new;
491 oconfig_item_t *old;
493 /* Ignore all blocks, including `Include' blocks. */
494 if (root->children[i].children_num != 0)
495 continue;
497 if (strcasecmp (root->children[i].key, "Include") != 0)
498 continue;
500 old = root->children + i;
502 if ((old->values_num != 1)
503 || (old->values[0].type != OCONFIG_TYPE_STRING))
504 {
505 ERROR ("configfile: `Include' needs exactly one string argument.");
506 continue;
507 }
509 new = cf_read_generic (old->values[0].value.string, depth + 1);
510 if (new == NULL)
511 continue;
513 /* Now replace the i'th child in `root' with `new'. */
514 cf_ci_replace_child (root, new, i);
516 /* ... and go back to the new i'th child. */
517 --i;
519 sfree (new->values);
520 sfree (new);
521 } /* for (i = 0; i < root->children_num; i++) */
523 return (0);
524 } /* int cf_include_all */
526 static oconfig_item_t *cf_read_file (const char *file, int depth)
527 {
528 oconfig_item_t *root;
530 assert (depth < CF_MAX_DEPTH);
532 root = oconfig_parse_file (file);
533 if (root == NULL)
534 {
535 ERROR ("configfile: Cannot read file `%s'.", file);
536 return (NULL);
537 }
539 cf_include_all (root, depth);
541 return (root);
542 } /* oconfig_item_t *cf_read_file */
544 static int cf_compare_string (const void *p1, const void *p2)
545 {
546 return strcmp (*(const char **) p1, *(const char **) p2);
547 }
549 static oconfig_item_t *cf_read_dir (const char *dir, int depth)
550 {
551 oconfig_item_t *root = NULL;
552 DIR *dh;
553 struct dirent *de;
554 char **filenames = NULL;
555 int filenames_num = 0;
556 int status;
557 int i;
559 assert (depth < CF_MAX_DEPTH);
561 dh = opendir (dir);
562 if (dh == NULL)
563 {
564 char errbuf[1024];
565 ERROR ("configfile: opendir failed: %s",
566 sstrerror (errno, errbuf, sizeof (errbuf)));
567 return (NULL);
568 }
570 root = (oconfig_item_t *) malloc (sizeof (oconfig_item_t));
571 if (root == NULL)
572 {
573 ERROR ("configfile: malloc failed.");
574 return (NULL);
575 }
576 memset (root, 0, sizeof (oconfig_item_t));
578 while ((de = readdir (dh)) != NULL)
579 {
580 char name[1024];
581 char **tmp;
583 if ((de->d_name[0] == '.') || (de->d_name[0] == 0))
584 continue;
586 status = ssnprintf (name, sizeof (name), "%s/%s",
587 dir, de->d_name);
588 if ((status < 0) || ((size_t) status >= sizeof (name)))
589 {
590 ERROR ("configfile: Not including `%s/%s' because its"
591 " name is too long.",
592 dir, de->d_name);
593 for (i = 0; i < filenames_num; ++i)
594 free (filenames[i]);
595 free (filenames);
596 free (root);
597 return (NULL);
598 }
600 ++filenames_num;
601 tmp = (char **) realloc (filenames,
602 filenames_num * sizeof (*filenames));
603 if (tmp == NULL) {
604 ERROR ("configfile: realloc failed.");
605 for (i = 0; i < filenames_num - 1; ++i)
606 free (filenames[i]);
607 free (filenames);
608 free (root);
609 return (NULL);
610 }
611 filenames = tmp;
613 filenames[filenames_num - 1] = sstrdup (name);
614 }
616 qsort ((void *) filenames, filenames_num, sizeof (*filenames),
617 cf_compare_string);
619 for (i = 0; i < filenames_num; ++i)
620 {
621 oconfig_item_t *temp;
622 char *name = filenames[i];
624 temp = cf_read_generic (name, depth);
625 if (temp == NULL)
626 {
627 /* An error should already have been reported. */
628 sfree (name);
629 continue;
630 }
632 cf_ci_append_children (root, temp);
633 sfree (temp->children);
634 sfree (temp);
636 free (name);
637 }
639 free(filenames);
640 return (root);
641 } /* oconfig_item_t *cf_read_dir */
643 /*
644 * cf_read_generic
645 *
646 * Path is stat'ed and either cf_read_file or cf_read_dir is called
647 * accordingly.
648 *
649 * There are two versions of this function: If `wordexp' exists shell wildcards
650 * will be expanded and the function will include all matches found. If
651 * `wordexp' (or, more precisely, it's header file) is not available the
652 * simpler function is used which does not do any such expansion.
653 */
654 #if HAVE_WORDEXP_H
655 static oconfig_item_t *cf_read_generic (const char *path, int depth)
656 {
657 oconfig_item_t *root = NULL;
658 int status;
659 const char *path_ptr;
660 wordexp_t we;
661 size_t i;
663 if (depth >= CF_MAX_DEPTH)
664 {
665 ERROR ("configfile: Not including `%s' because the maximum "
666 "nesting depth has been reached.", path);
667 return (NULL);
668 }
670 status = wordexp (path, &we, WRDE_NOCMD);
671 if (status != 0)
672 {
673 ERROR ("configfile: wordexp (%s) failed.", path);
674 return (NULL);
675 }
677 root = (oconfig_item_t *) malloc (sizeof (oconfig_item_t));
678 if (root == NULL)
679 {
680 ERROR ("configfile: malloc failed.");
681 return (NULL);
682 }
683 memset (root, '\0', sizeof (oconfig_item_t));
685 /* wordexp() might return a sorted list already. That's not
686 * documented though, so let's make sure we get what we want. */
687 qsort ((void *) we.we_wordv, we.we_wordc, sizeof (*we.we_wordv),
688 cf_compare_string);
690 for (i = 0; i < we.we_wordc; i++)
691 {
692 oconfig_item_t *temp;
693 struct stat statbuf;
695 path_ptr = we.we_wordv[i];
697 status = stat (path_ptr, &statbuf);
698 if (status != 0)
699 {
700 char errbuf[1024];
701 WARNING ("configfile: stat (%s) failed: %s",
702 path_ptr,
703 sstrerror (errno, errbuf, sizeof (errbuf)));
704 continue;
705 }
707 if (S_ISREG (statbuf.st_mode))
708 temp = cf_read_file (path_ptr, depth);
709 else if (S_ISDIR (statbuf.st_mode))
710 temp = cf_read_dir (path_ptr, depth);
711 else
712 {
713 WARNING ("configfile: %s is neither a file nor a "
714 "directory.", path);
715 continue;
716 }
718 if (temp == NULL) {
719 oconfig_free (root);
720 return (NULL);
721 }
723 cf_ci_append_children (root, temp);
724 sfree (temp->children);
725 sfree (temp);
726 }
728 wordfree (&we);
730 if (root->children == NULL)
731 {
732 oconfig_free (root);
733 return (NULL);
734 }
736 return (root);
737 } /* oconfig_item_t *cf_read_generic */
738 /* #endif HAVE_WORDEXP_H */
740 #else /* if !HAVE_WORDEXP_H */
741 static oconfig_item_t *cf_read_generic (const char *path, int depth)
742 {
743 struct stat statbuf;
744 int status;
746 if (depth >= CF_MAX_DEPTH)
747 {
748 ERROR ("configfile: Not including `%s' because the maximum "
749 "nesting depth has been reached.", path);
750 return (NULL);
751 }
753 status = stat (path, &statbuf);
754 if (status != 0)
755 {
756 char errbuf[1024];
757 ERROR ("configfile: stat (%s) failed: %s",
758 path,
759 sstrerror (errno, errbuf, sizeof (errbuf)));
760 return (NULL);
761 }
763 if (S_ISREG (statbuf.st_mode))
764 return (cf_read_file (path, depth));
765 else if (S_ISDIR (statbuf.st_mode))
766 return (cf_read_dir (path, depth));
768 ERROR ("configfile: %s is neither a file nor a directory.", path);
769 return (NULL);
770 } /* oconfig_item_t *cf_read_generic */
771 #endif /* !HAVE_WORDEXP_H */
773 /*
774 * Public functions
775 */
776 int global_option_set (const char *option, const char *value)
777 {
778 int i;
780 DEBUG ("option = %s; value = %s;", option, value);
782 for (i = 0; i < cf_global_options_num; i++)
783 if (strcasecmp (cf_global_options[i].key, option) == 0)
784 break;
786 if (i >= cf_global_options_num)
787 return (-1);
789 sfree (cf_global_options[i].value);
791 if (value != NULL)
792 cf_global_options[i].value = strdup (value);
793 else
794 cf_global_options[i].value = NULL;
796 return (0);
797 }
799 const char *global_option_get (const char *option)
800 {
801 int i;
803 for (i = 0; i < cf_global_options_num; i++)
804 if (strcasecmp (cf_global_options[i].key, option) == 0)
805 break;
807 if (i >= cf_global_options_num)
808 return (NULL);
810 return ((cf_global_options[i].value != NULL)
811 ? cf_global_options[i].value
812 : cf_global_options[i].def);
813 } /* char *global_option_get */
815 void cf_unregister (const char *type)
816 {
817 cf_callback_t *this, *prev;
819 for (prev = NULL, this = first_callback;
820 this != NULL;
821 prev = this, this = this->next)
822 if (strcasecmp (this->type, type) == 0)
823 {
824 if (prev == NULL)
825 first_callback = this->next;
826 else
827 prev->next = this->next;
829 free (this);
830 break;
831 }
832 } /* void cf_unregister */
834 void cf_unregister_complex (const char *type)
835 {
836 cf_complex_callback_t *this, *prev;
838 for (prev = NULL, this = complex_callback_head;
839 this != NULL;
840 prev = this, this = this->next)
841 if (strcasecmp (this->type, type) == 0)
842 {
843 if (prev == NULL)
844 complex_callback_head = this->next;
845 else
846 prev->next = this->next;
848 sfree (this->type);
849 sfree (this);
850 break;
851 }
852 } /* void cf_unregister */
854 void cf_register (const char *type,
855 int (*callback) (const char *, const char *),
856 const char **keys, int keys_num)
857 {
858 cf_callback_t *cf_cb;
860 /* Remove this module from the list, if it already exists */
861 cf_unregister (type);
863 /* This pointer will be free'd in `cf_unregister' */
864 if ((cf_cb = (cf_callback_t *) malloc (sizeof (cf_callback_t))) == NULL)
865 return;
867 cf_cb->type = type;
868 cf_cb->callback = callback;
869 cf_cb->keys = keys;
870 cf_cb->keys_num = keys_num;
872 cf_cb->next = first_callback;
873 first_callback = cf_cb;
874 } /* void cf_register */
876 int cf_register_complex (const char *type, int (*callback) (oconfig_item_t *))
877 {
878 cf_complex_callback_t *new;
880 new = (cf_complex_callback_t *) malloc (sizeof (cf_complex_callback_t));
881 if (new == NULL)
882 return (-1);
884 new->type = strdup (type);
885 if (new->type == NULL)
886 {
887 sfree (new);
888 return (-1);
889 }
891 new->callback = callback;
892 new->next = NULL;
894 if (complex_callback_head == NULL)
895 {
896 complex_callback_head = new;
897 }
898 else
899 {
900 cf_complex_callback_t *last = complex_callback_head;
901 while (last->next != NULL)
902 last = last->next;
903 last->next = new;
904 }
906 return (0);
907 } /* int cf_register_complex */
909 int cf_read (char *filename)
910 {
911 oconfig_item_t *conf;
912 int i;
914 conf = cf_read_generic (filename, 0 /* depth */);
915 if (conf == NULL)
916 {
917 ERROR ("Unable to read config file %s.", filename);
918 return (-1);
919 }
921 for (i = 0; i < conf->children_num; i++)
922 {
923 if (conf->children[i].children == NULL)
924 dispatch_value (conf->children + i);
925 else
926 dispatch_block (conf->children + i);
927 }
929 oconfig_free (conf);
931 /* Read the default types.db if no `TypesDB' option was given. */
932 if (cf_default_typesdb)
933 read_types_list (PKGDATADIR"/types.db");
935 return (0);
936 } /* int cf_read */
938 /* Assures the config option is a string, duplicates it and returns the copy in
939 * "ret_string". If necessary "*ret_string" is freed first. Returns zero upon
940 * success. */
941 int cf_util_get_string (const oconfig_item_t *ci, char **ret_string) /* {{{ */
942 {
943 char *string;
945 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
946 {
947 ERROR ("cf_util_get_string: The %s option requires "
948 "exactly one string argument.", ci->key);
949 return (-1);
950 }
952 string = strdup (ci->values[0].value.string);
953 if (string == NULL)
954 return (-1);
956 if (*ret_string != NULL)
957 sfree (*ret_string);
958 *ret_string = string;
960 return (0);
961 } /* }}} int cf_util_get_string */
963 /* Assures the config option is a string and copies it to the provided buffer.
964 * Assures null-termination. */
965 int cf_util_get_string_buffer (const oconfig_item_t *ci, char *buffer, /* {{{ */
966 size_t buffer_size)
967 {
968 if ((ci == NULL) || (buffer == NULL) || (buffer_size < 1))
969 return (EINVAL);
971 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
972 {
973 ERROR ("cf_util_get_string_buffer: The %s option requires "
974 "exactly one string argument.", ci->key);
975 return (-1);
976 }
978 strncpy (buffer, ci->values[0].value.string, buffer_size);
979 buffer[buffer_size - 1] = 0;
981 return (0);
982 } /* }}} int cf_util_get_string_buffer */
984 /* Assures the config option is a number and returns it as an int. */
985 int cf_util_get_int (const oconfig_item_t *ci, int *ret_value) /* {{{ */
986 {
987 if ((ci == NULL) || (ret_value == NULL))
988 return (EINVAL);
990 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
991 {
992 ERROR ("cf_util_get_int: The %s option requires "
993 "exactly one numeric argument.", ci->key);
994 return (-1);
995 }
997 *ret_value = (int) ci->values[0].value.number;
999 return (0);
1000 } /* }}} int cf_util_get_int */
1002 int cf_util_get_boolean (const oconfig_item_t *ci, _Bool *ret_bool) /* {{{ */
1003 {
1004 if ((ci == NULL) || (ret_bool == NULL))
1005 return (EINVAL);
1007 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
1008 {
1009 ERROR ("cf_util_get_boolean: The %s option requires "
1010 "exactly one boolean argument.", ci->key);
1011 return (-1);
1012 }
1014 *ret_bool = ci->values[0].value.boolean ? 1 : 0;
1016 return (0);
1017 } /* }}} int cf_util_get_boolean */
1019 int cf_util_get_flag (const oconfig_item_t *ci, /* {{{ */
1020 unsigned int *ret_value, unsigned int flag)
1021 {
1022 int status;
1023 _Bool b;
1025 if (ret_value == NULL)
1026 return (EINVAL);
1028 b = 0;
1029 status = cf_util_get_boolean (ci, &b);
1030 if (status != 0)
1031 return (status);
1033 if (b)
1034 {
1035 *ret_value |= flag;
1036 }
1037 else
1038 {
1039 *ret_value &= ~flag;
1040 }
1042 return (0);
1043 } /* }}} int cf_util_get_flag */
1045 /* Assures that the config option is a string. The string is then converted to
1046 * a port number using `service_name_to_port_number' and returned. Returns the
1047 * port number in the range [1-65535] or less than zero upon failure. */
1048 int cf_util_get_port_number (const oconfig_item_t *ci) /* {{{ */
1049 {
1050 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1051 {
1052 ERROR ("cf_util_get_port_number: The %s option requires "
1053 "exactly one string argument.", ci->key);
1054 return (-1);
1055 }
1057 return (service_name_to_port_number (ci->values[0].value.string));
1058 } /* }}} int cf_util_get_port_number */
1060 int cf_util_get_cdtime (const oconfig_item_t *ci, cdtime_t *ret_value) /* {{{ */
1061 {
1062 if ((ci == NULL) || (ret_value == NULL))
1063 return (EINVAL);
1065 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
1066 {
1067 ERROR ("cf_util_get_cdtime: The %s option requires "
1068 "exactly one numeric argument.", ci->key);
1069 return (-1);
1070 }
1072 if (ci->values[0].value.number < 0.0)
1073 {
1074 ERROR ("cf_util_get_cdtime: The numeric argument of the %s "
1075 "option must not be negative.", ci->key);
1076 return (-1);
1077 }
1079 *ret_value = DOUBLE_TO_CDTIME_T (ci->values[0].value.number);
1081 return (0);
1082 } /* }}} int cf_util_get_cdtime */