2 * collectd - src/plugin.c
3 * Copyright (C) 2005-2013 Florian octo Forster
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; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at collectd.org>
20 * Sebastian Harl <sh at tokkee.org>
24 #include "utils_complain.h"
34 #include "configfile.h"
35 #include "utils_avltree.h"
36 #include "utils_llist.h"
37 #include "utils_heap.h"
38 #include "utils_cache.h"
39 #include "filter_chain.h"
44 struct callback_func_s
50 typedef struct callback_func_s callback_func_t;
54 #define RF_REMOVE 65535
57 /* `read_func_t' "inherits" from `callback_func_t'.
58 * The `rf_super' member MUST be the first one in this structure! */
59 #define rf_callback rf_super.cf_callback
60 #define rf_udata rf_super.cf_udata
61 #define rf_ctx rf_super.cf_ctx
62 callback_func_t rf_super;
63 char rf_group[DATA_MAX_NAME_LEN];
64 char rf_name[DATA_MAX_NAME_LEN];
66 struct timespec rf_interval;
67 struct timespec rf_effective_interval;
68 struct timespec rf_next_read;
70 typedef struct read_func_s read_func_t;
73 typedef struct write_queue_s write_queue_t;
83 static llist_t *list_init;
84 static llist_t *list_write;
85 static llist_t *list_flush;
86 static llist_t *list_missing;
87 static llist_t *list_shutdown;
88 static llist_t *list_log;
89 static llist_t *list_notification;
91 static fc_chain_t *pre_cache_chain = NULL;
92 static fc_chain_t *post_cache_chain = NULL;
94 static c_avl_tree_t *data_sets;
96 static char *plugindir = NULL;
98 static c_heap_t *read_heap = NULL;
99 static llist_t *read_list;
100 static int read_loop = 1;
101 static pthread_mutex_t read_lock = PTHREAD_MUTEX_INITIALIZER;
102 static pthread_cond_t read_cond = PTHREAD_COND_INITIALIZER;
103 static pthread_t *read_threads = NULL;
104 static int read_threads_num = 0;
106 static write_queue_t *write_queue_head;
107 static write_queue_t *write_queue_tail;
108 static _Bool write_loop = 1;
109 static pthread_mutex_t write_lock = PTHREAD_MUTEX_INITIALIZER;
110 static pthread_cond_t write_cond = PTHREAD_COND_INITIALIZER;
111 static pthread_t *write_threads = NULL;
112 static size_t write_threads_num = 0;
114 static pthread_key_t plugin_ctx_key;
115 static _Bool plugin_ctx_key_initialized = 0;
120 static int plugin_dispatch_values_internal (value_list_t *vl);
122 static const char *plugin_get_dir (void)
124 if (plugindir == NULL)
130 static void destroy_callback (callback_func_t *cf) /* {{{ */
135 if ((cf->cf_udata.data != NULL) && (cf->cf_udata.free_func != NULL))
137 cf->cf_udata.free_func (cf->cf_udata.data);
138 cf->cf_udata.data = NULL;
139 cf->cf_udata.free_func = NULL;
142 } /* }}} void destroy_callback */
144 static void destroy_all_callbacks (llist_t **list) /* {{{ */
151 le = llist_head (*list);
159 destroy_callback (le->value);
165 llist_destroy (*list);
167 } /* }}} void destroy_all_callbacks */
169 static void destroy_read_heap (void) /* {{{ */
171 if (read_heap == NULL)
178 cf = c_heap_get_root (read_heap);
182 destroy_callback (cf);
185 c_heap_destroy (read_heap);
187 } /* }}} void destroy_read_heap */
189 static int register_callback (llist_t **list, /* {{{ */
190 const char *name, callback_func_t *cf)
197 *list = llist_create ();
200 ERROR ("plugin: register_callback: "
201 "llist_create failed.");
202 destroy_callback (cf);
210 ERROR ("plugin: register_callback: strdup failed.");
211 destroy_callback (cf);
215 le = llist_search (*list, name);
218 le = llentry_create (key, cf);
221 ERROR ("plugin: register_callback: "
222 "llentry_create failed.");
224 destroy_callback (cf);
228 llist_append (*list, le);
232 callback_func_t *old_cf;
237 WARNING ("plugin: register_callback: "
238 "a callback named `%s' already exists - "
239 "overwriting the old entry!", name);
241 destroy_callback (old_cf);
246 } /* }}} int register_callback */
248 static int create_register_callback (llist_t **list, /* {{{ */
249 const char *name, void *callback, user_data_t *ud)
253 cf = (callback_func_t *) malloc (sizeof (*cf));
256 ERROR ("plugin: create_register_callback: malloc failed.");
259 memset (cf, 0, sizeof (*cf));
261 cf->cf_callback = callback;
264 cf->cf_udata.data = NULL;
265 cf->cf_udata.free_func = NULL;
272 cf->cf_ctx = plugin_get_ctx ();
274 return (register_callback (list, name, cf));
275 } /* }}} int create_register_callback */
277 static int plugin_unregister (llist_t *list, const char *name) /* {{{ */
284 e = llist_search (list, name);
288 llist_remove (list, e);
291 destroy_callback (e->value);
296 } /* }}} int plugin_unregister */
299 * (Try to) load the shared object `file'. Won't complain if it isn't a shared
300 * object, but it will bitch about a shared object not having a
301 * ``module_register'' symbol..
303 static int plugin_load_file (char *file, uint32_t flags)
306 void (*reg_handle) (void);
309 lt_dlerror (); /* clear errors */
311 #if LIBTOOL_VERSION == 2
312 if (flags & PLUGIN_FLAGS_GLOBAL) {
314 lt_dladvise_init(&advise);
315 lt_dladvise_global(&advise);
316 dlh = lt_dlopenadvise(file, advise);
317 lt_dladvise_destroy(&advise);
319 dlh = lt_dlopen (file);
321 #else /* if LIBTOOL_VERSION == 1 */
322 if (flags & PLUGIN_FLAGS_GLOBAL)
323 WARNING ("plugin_load_file: The global flag is not supported, "
324 "libtool 2 is required for this.");
325 dlh = lt_dlopen (file);
330 char errbuf[1024] = "";
332 ssnprintf (errbuf, sizeof (errbuf),
333 "lt_dlopen (\"%s\") failed: %s. "
334 "The most common cause for this problem are "
335 "missing dependencies. Use ldd(1) to check "
336 "the dependencies of the plugin "
338 file, lt_dlerror ());
340 ERROR ("%s", errbuf);
341 /* Make sure this is printed to STDERR in any case, but also
342 * make sure it's printed only once. */
343 if (list_log != NULL)
344 fprintf (stderr, "ERROR: %s\n", errbuf);
349 if ((reg_handle = (void (*) (void)) lt_dlsym (dlh, "module_register")) == NULL)
351 WARNING ("Couldn't find symbol \"module_register\" in \"%s\": %s\n",
352 file, lt_dlerror ());
362 static _Bool timeout_reached(struct timespec timeout)
365 gettimeofday(&now, NULL);
366 return (now.tv_sec >= timeout.tv_sec && now.tv_usec >= (timeout.tv_nsec / 1000));
369 static void *plugin_read_thread (void __attribute__((unused)) *args)
371 while (read_loop != 0)
374 plugin_ctx_t old_ctx;
380 /* Get the read function that needs to be read next.
381 * We don't need to hold "read_lock" for the heap, but we need
382 * to call c_heap_get_root() and pthread_cond_wait() in the
383 * same protected block. */
384 pthread_mutex_lock (&read_lock);
385 rf = c_heap_get_root (read_heap);
388 pthread_cond_wait (&read_cond, &read_lock);
389 pthread_mutex_unlock (&read_lock);
392 pthread_mutex_unlock (&read_lock);
394 if ((rf->rf_interval.tv_sec == 0) && (rf->rf_interval.tv_nsec == 0))
396 /* this should not happen, because the interval is set
397 * for each plugin when loading it
398 * XXX: issue a warning? */
401 CDTIME_T_TO_TIMESPEC (plugin_get_interval (), &rf->rf_interval);
403 rf->rf_effective_interval = rf->rf_interval;
405 CDTIME_T_TO_TIMESPEC (now, &rf->rf_next_read);
408 /* sleep until this entry is due,
409 * using pthread_cond_timedwait */
410 pthread_mutex_lock (&read_lock);
411 /* In pthread_cond_timedwait, spurious wakeups are possible
412 * (and really happen, at least on NetBSD with > 1 CPU), thus
413 * we need to re-evaluate the condition every time
414 * pthread_cond_timedwait returns. */
416 while ((read_loop != 0)
417 && !timeout_reached(rf->rf_next_read)
420 rc = pthread_cond_timedwait (&read_cond, &read_lock,
424 /* Must hold `read_lock' when accessing `rf->rf_type'. */
425 rf_type = rf->rf_type;
426 pthread_mutex_unlock (&read_lock);
428 /* Check if we're supposed to stop.. This may have interrupted
432 /* Insert `rf' again, so it can be free'd correctly */
433 c_heap_insert (read_heap, rf);
437 /* The entry has been marked for deletion. The linked list
438 * entry has already been removed by `plugin_unregister_read'.
439 * All we have to do here is free the `read_func_t' and
441 if (rf_type == RF_REMOVE)
443 DEBUG ("plugin_read_thread: Destroying the `%s' "
444 "callback.", rf->rf_name);
445 destroy_callback ((callback_func_t *) rf);
450 DEBUG ("plugin_read_thread: Handling `%s'.", rf->rf_name);
452 old_ctx = plugin_set_ctx (rf->rf_ctx);
454 if (rf_type == RF_SIMPLE)
456 int (*callback) (void);
458 callback = rf->rf_callback;
459 status = (*callback) ();
463 plugin_read_cb callback;
465 assert (rf_type == RF_COMPLEX);
467 callback = rf->rf_callback;
468 status = (*callback) (&rf->rf_udata);
471 plugin_set_ctx (old_ctx);
473 /* If the function signals failure, we will increase the
474 * intervals in which it will be called. */
477 rf->rf_effective_interval.tv_sec *= 2;
478 rf->rf_effective_interval.tv_nsec *= 2;
479 NORMALIZE_TIMESPEC (rf->rf_effective_interval);
481 if (rf->rf_effective_interval.tv_sec >= 86400)
483 rf->rf_effective_interval.tv_sec = 86400;
484 rf->rf_effective_interval.tv_nsec = 0;
487 NOTICE ("read-function of plugin `%s' failed. "
488 "Will suspend it for %i seconds.",
490 (int) rf->rf_effective_interval.tv_sec);
494 /* Success: Restore the interval, if it was changed. */
495 rf->rf_effective_interval = rf->rf_interval;
498 /* update the ``next read due'' field */
501 DEBUG ("plugin_read_thread: Effective interval of the "
502 "%s plugin is %i.%09i.",
504 (int) rf->rf_effective_interval.tv_sec,
505 (int) rf->rf_effective_interval.tv_nsec);
507 /* Calculate the next (absolute) time at which this function
508 * should be called. */
509 rf->rf_next_read.tv_sec = rf->rf_next_read.tv_sec
510 + rf->rf_effective_interval.tv_sec;
511 rf->rf_next_read.tv_nsec = rf->rf_next_read.tv_nsec
512 + rf->rf_effective_interval.tv_nsec;
513 NORMALIZE_TIMESPEC (rf->rf_next_read);
515 /* Check, if `rf_next_read' is in the past. */
516 if (TIMESPEC_TO_CDTIME_T (&rf->rf_next_read) < now)
518 /* `rf_next_read' is in the past. Insert `now'
519 * so this value doesn't trail off into the
521 CDTIME_T_TO_TIMESPEC (now, &rf->rf_next_read);
524 DEBUG ("plugin_read_thread: Next read of the %s plugin at %i.%09i.",
526 (int) rf->rf_next_read.tv_sec,
527 (int) rf->rf_next_read.tv_nsec);
529 /* Re-insert this read function into the heap again. */
530 c_heap_insert (read_heap, rf);
531 } /* while (read_loop) */
535 } /* void *plugin_read_thread */
537 static void start_read_threads (int num)
541 if (read_threads != NULL)
544 read_threads = (pthread_t *) calloc (num, sizeof (pthread_t));
545 if (read_threads == NULL)
547 ERROR ("plugin: start_read_threads: calloc failed.");
551 read_threads_num = 0;
552 for (i = 0; i < num; i++)
554 if (pthread_create (read_threads + read_threads_num, NULL,
555 plugin_read_thread, NULL) == 0)
561 ERROR ("plugin: start_read_threads: pthread_create failed.");
565 } /* void start_read_threads */
567 static void stop_read_threads (void)
571 if (read_threads == NULL)
574 INFO ("collectd: Stopping %i read threads.", read_threads_num);
576 pthread_mutex_lock (&read_lock);
578 DEBUG ("plugin: stop_read_threads: Signalling `read_cond'");
579 pthread_cond_broadcast (&read_cond);
580 pthread_mutex_unlock (&read_lock);
582 for (i = 0; i < read_threads_num; i++)
584 if (pthread_join (read_threads[i], NULL) != 0)
586 ERROR ("plugin: stop_read_threads: pthread_join failed.");
588 read_threads[i] = (pthread_t) 0;
590 sfree (read_threads);
591 read_threads_num = 0;
592 } /* void stop_read_threads */
594 static void plugin_value_list_free (value_list_t *vl) /* {{{ */
599 meta_data_destroy (vl->meta);
602 } /* }}} void plugin_value_list_free */
604 static value_list_t *plugin_value_list_clone (value_list_t const *vl_orig) /* {{{ */
611 vl = malloc (sizeof (*vl));
614 memcpy (vl, vl_orig, sizeof (*vl));
616 vl->values = calloc (vl_orig->values_len, sizeof (*vl->values));
617 if (vl->values == NULL)
619 plugin_value_list_free (vl);
622 memcpy (vl->values, vl_orig->values,
623 vl_orig->values_len * sizeof (*vl->values));
625 vl->meta = meta_data_clone (vl->meta);
626 if ((vl_orig->meta != NULL) && (vl->meta == NULL))
628 plugin_value_list_free (vl);
633 vl->time = cdtime ();
635 /* Once this gets dequeued by a write thread, we don't have access to
636 * the thread context anymore. We therefore fill in the interval here,
637 * if required. An alternative would be to copy the context and clone
638 * the context in the write thread, but that seems overly complicated
639 * for the interval alone. */
640 if (vl->interval == 0)
642 plugin_ctx_t ctx = plugin_get_ctx ();
644 if (ctx.interval != 0)
645 vl->interval = ctx.interval;
648 char name[6 * DATA_MAX_NAME_LEN];
649 FORMAT_VL (name, sizeof (name), vl);
650 ERROR ("plugin_value_list_clone: Unable to determine "
651 "interval from context for "
652 "value list \"%s\". "
653 "This indicates a broken plugin. "
654 "Please report this problem to the "
655 "collectd mailing list or at "
656 "<http://collectd.org/bugs/>.", name);
657 vl->interval = cf_get_default_interval ();
662 } /* }}} value_list_t *plugin_value_list_clone */
664 static int plugin_write_enqueue (value_list_t const *vl) /* {{{ */
668 q = malloc (sizeof (*q));
673 q->vl = plugin_value_list_clone (vl);
680 pthread_mutex_lock (&write_lock);
682 if (write_queue_tail == NULL)
684 write_queue_head = q;
685 write_queue_tail = q;
689 write_queue_tail->next = q;
690 write_queue_tail = q;
693 pthread_cond_signal (&write_cond);
694 pthread_mutex_unlock (&write_lock);
697 } /* }}} int plugin_write_enqueue */
699 static value_list_t *plugin_write_dequeue (void) /* {{{ */
704 pthread_mutex_lock (&write_lock);
706 while (write_loop && (write_queue_head == NULL))
707 pthread_cond_wait (&write_cond, &write_lock);
709 if (write_queue_head == NULL)
711 pthread_mutex_unlock (&write_lock);
715 q = write_queue_head;
716 write_queue_head = q->next;
717 if (write_queue_head == NULL)
718 write_queue_tail = NULL;
720 pthread_mutex_unlock (&write_lock);
725 } /* }}} value_list_t *plugin_write_dequeue */
727 static void *plugin_write_thread (void __attribute__((unused)) *args) /* {{{ */
731 value_list_t *vl = plugin_write_dequeue ();
735 plugin_dispatch_values_internal (vl);
737 plugin_value_list_free (vl);
742 } /* }}} void *plugin_write_thread */
744 static void start_write_threads (size_t num) /* {{{ */
748 if (write_threads != NULL)
751 write_threads = (pthread_t *) calloc (num, sizeof (pthread_t));
752 if (write_threads == NULL)
754 ERROR ("plugin: start_write_threads: calloc failed.");
758 write_threads_num = 0;
759 for (i = 0; i < num; i++)
763 status = pthread_create (write_threads + write_threads_num,
770 ERROR ("plugin: start_write_threads: pthread_create failed "
771 "with status %i (%s).", status,
772 sstrerror (status, errbuf, sizeof (errbuf)));
778 } /* }}} void start_write_threads */
780 static void stop_write_threads (void) /* {{{ */
785 if (write_threads == NULL)
788 INFO ("collectd: Stopping %zu write threads.", write_threads_num);
790 pthread_mutex_lock (&write_lock);
792 DEBUG ("plugin: stop_write_threads: Signalling `write_cond'");
793 pthread_cond_broadcast (&write_cond);
794 pthread_mutex_unlock (&write_lock);
796 for (i = 0; i < write_threads_num; i++)
798 if (pthread_join (write_threads[i], NULL) != 0)
800 ERROR ("plugin: stop_write_threads: pthread_join failed.");
802 write_threads[i] = (pthread_t) 0;
804 sfree (write_threads);
805 write_threads_num = 0;
807 pthread_mutex_lock (&write_lock);
809 for (q = write_queue_head; q != NULL; q = q->next)
811 plugin_value_list_free (q->vl);
815 write_queue_head = NULL;
816 write_queue_tail = NULL;
817 pthread_mutex_unlock (&write_lock);
821 WARNING ("plugin: %i value list%s left after shutting down "
822 "the write threads.",
823 i, (i == 1) ? " was" : "s were");
825 } /* }}} void stop_write_threads */
830 void plugin_set_dir (const char *dir)
832 if (plugindir != NULL)
837 else if ((plugindir = strdup (dir)) == NULL)
840 ERROR ("strdup failed: %s",
841 sstrerror (errno, errbuf, sizeof (errbuf)));
846 int plugin_load (const char *type, uint32_t flags)
850 char filename[BUFSIZE] = "";
851 char typename[BUFSIZE];
858 dir = plugin_get_dir ();
861 /* `cpu' should not match `cpufreq'. To solve this we add `.so' to the
862 * type when matching the filename */
863 status = ssnprintf (typename, sizeof (typename), "%s.so", type);
864 if ((status < 0) || ((size_t) status >= sizeof (typename)))
866 WARNING ("plugin_load: Filename too long: \"%s.so\"", type);
869 typename_len = strlen (typename);
871 if ((dh = opendir (dir)) == NULL)
874 ERROR ("plugin_load: opendir (%s) failed: %s", dir,
875 sstrerror (errno, errbuf, sizeof (errbuf)));
879 while ((de = readdir (dh)) != NULL)
881 if (strncasecmp (de->d_name, typename, typename_len))
884 status = ssnprintf (filename, sizeof (filename),
885 "%s/%s", dir, de->d_name);
886 if ((status < 0) || ((size_t) status >= sizeof (filename)))
888 WARNING ("plugin_load: Filename too long: \"%s/%s\"",
893 if (lstat (filename, &statbuf) == -1)
896 WARNING ("plugin_load: stat (\"%s\") failed: %s",
898 sstrerror (errno, errbuf, sizeof (errbuf)));
901 else if (!S_ISREG (statbuf.st_mode))
903 /* don't follow symlinks */
904 WARNING ("plugin_load: %s is not a regular file.",
909 status = plugin_load_file (filename, flags);
918 ERROR ("plugin_load: Load plugin \"%s\" failed with "
919 "status %i.", type, status);
925 if (filename[0] == 0)
926 ERROR ("plugin_load: Could not find plugin \"%s\" in %s",
933 * The `register_*' functions follow
935 int plugin_register_config (const char *name,
936 int (*callback) (const char *key, const char *val),
937 const char **keys, int keys_num)
939 cf_register (name, callback, keys, keys_num);
941 } /* int plugin_register_config */
943 int plugin_register_complex_config (const char *type,
944 int (*callback) (oconfig_item_t *))
946 return (cf_register_complex (type, callback));
947 } /* int plugin_register_complex_config */
949 int plugin_register_init (const char *name,
950 int (*callback) (void))
952 return (create_register_callback (&list_init, name, (void *) callback,
953 /* user_data = */ NULL));
954 } /* plugin_register_init */
956 static int plugin_compare_read_func (const void *arg0, const void *arg1)
958 const read_func_t *rf0;
959 const read_func_t *rf1;
964 if (rf0->rf_next_read.tv_sec < rf1->rf_next_read.tv_sec)
966 else if (rf0->rf_next_read.tv_sec > rf1->rf_next_read.tv_sec)
968 else if (rf0->rf_next_read.tv_nsec < rf1->rf_next_read.tv_nsec)
970 else if (rf0->rf_next_read.tv_nsec > rf1->rf_next_read.tv_nsec)
974 } /* int plugin_compare_read_func */
976 /* Add a read function to both, the heap and a linked list. The linked list if
977 * used to look-up read functions, especially for the remove function. The heap
978 * is used to determine which plugin to read next. */
979 static int plugin_insert_read (read_func_t *rf)
984 pthread_mutex_lock (&read_lock);
986 if (read_list == NULL)
988 read_list = llist_create ();
989 if (read_list == NULL)
991 pthread_mutex_unlock (&read_lock);
992 ERROR ("plugin_insert_read: read_list failed.");
997 if (read_heap == NULL)
999 read_heap = c_heap_create (plugin_compare_read_func);
1000 if (read_heap == NULL)
1002 pthread_mutex_unlock (&read_lock);
1003 ERROR ("plugin_insert_read: c_heap_create failed.");
1008 le = llist_search (read_list, rf->rf_name);
1011 pthread_mutex_unlock (&read_lock);
1012 WARNING ("The read function \"%s\" is already registered. "
1013 "Check for duplicate \"LoadPlugin\" lines "
1014 "in your configuration!",
1019 le = llentry_create (rf->rf_name, rf);
1022 pthread_mutex_unlock (&read_lock);
1023 ERROR ("plugin_insert_read: llentry_create failed.");
1027 status = c_heap_insert (read_heap, rf);
1030 pthread_mutex_unlock (&read_lock);
1031 ERROR ("plugin_insert_read: c_heap_insert failed.");
1032 llentry_destroy (le);
1036 /* This does not fail. */
1037 llist_append (read_list, le);
1039 /* Wake up all the read threads. */
1040 pthread_cond_broadcast (&read_cond);
1041 pthread_mutex_unlock (&read_lock);
1043 } /* int plugin_insert_read */
1045 static int read_cb_wrapper (user_data_t *ud)
1047 int (*callback) (void);
1052 callback = ud->data;
1054 } /* int read_cb_wrapper */
1056 int plugin_register_read (const char *name,
1057 int (*callback) (void))
1060 plugin_ctx_t ctx = plugin_get_ctx ();
1063 if (ctx.interval != 0) {
1064 /* If ctx.interval is not zero (== use the plugin or global
1065 * interval), we need to use the "complex" read callback,
1066 * because only that allows to specify a different interval.
1067 * Wrap the callback using read_cb_wrapper(). */
1068 struct timespec interval;
1069 user_data_t user_data;
1071 user_data.data = callback;
1072 user_data.free_func = NULL;
1074 CDTIME_T_TO_TIMESPEC (ctx.interval, &interval);
1075 return plugin_register_complex_read (/* group = */ NULL,
1076 name, read_cb_wrapper, &interval, &user_data);
1079 DEBUG ("plugin_register_read: default_interval = %.3f",
1080 CDTIME_T_TO_DOUBLE(plugin_get_interval ()));
1082 rf = malloc (sizeof (*rf));
1085 ERROR ("plugin_register_read: malloc failed.");
1089 memset (rf, 0, sizeof (read_func_t));
1090 rf->rf_callback = (void *) callback;
1091 rf->rf_udata.data = NULL;
1092 rf->rf_udata.free_func = NULL;
1094 rf->rf_group[0] = '\0';
1095 sstrncpy (rf->rf_name, name, sizeof (rf->rf_name));
1096 rf->rf_type = RF_SIMPLE;
1097 rf->rf_interval.tv_sec = 0;
1098 rf->rf_interval.tv_nsec = 0;
1099 rf->rf_effective_interval = rf->rf_interval;
1101 status = plugin_insert_read (rf);
1106 } /* int plugin_register_read */
1108 int plugin_register_complex_read (const char *group, const char *name,
1109 plugin_read_cb callback,
1110 const struct timespec *interval,
1111 user_data_t *user_data)
1114 plugin_ctx_t ctx = plugin_get_ctx ();
1117 rf = malloc (sizeof (*rf));
1120 ERROR ("plugin_register_complex_read: malloc failed.");
1124 memset (rf, 0, sizeof (read_func_t));
1125 rf->rf_callback = (void *) callback;
1127 sstrncpy (rf->rf_group, group, sizeof (rf->rf_group));
1129 rf->rf_group[0] = '\0';
1130 sstrncpy (rf->rf_name, name, sizeof (rf->rf_name));
1131 rf->rf_type = RF_COMPLEX;
1132 if (interval != NULL)
1134 rf->rf_interval = *interval;
1136 else if (ctx.interval != 0)
1138 CDTIME_T_TO_TIMESPEC (ctx.interval, &rf->rf_interval);
1140 rf->rf_effective_interval = rf->rf_interval;
1142 DEBUG ("plugin_register_read: interval = %i.%09i",
1143 (int) rf->rf_interval.tv_sec,
1144 (int) rf->rf_interval.tv_nsec);
1147 if (user_data == NULL)
1149 rf->rf_udata.data = NULL;
1150 rf->rf_udata.free_func = NULL;
1154 rf->rf_udata = *user_data;
1159 status = plugin_insert_read (rf);
1164 } /* int plugin_register_complex_read */
1166 int plugin_register_write (const char *name,
1167 plugin_write_cb callback, user_data_t *ud)
1169 return (create_register_callback (&list_write, name,
1170 (void *) callback, ud));
1171 } /* int plugin_register_write */
1173 int plugin_register_flush (const char *name,
1174 plugin_flush_cb callback, user_data_t *ud)
1176 return (create_register_callback (&list_flush, name,
1177 (void *) callback, ud));
1178 } /* int plugin_register_flush */
1180 int plugin_register_missing (const char *name,
1181 plugin_missing_cb callback, user_data_t *ud)
1183 return (create_register_callback (&list_missing, name,
1184 (void *) callback, ud));
1185 } /* int plugin_register_missing */
1187 int plugin_register_shutdown (const char *name,
1188 int (*callback) (void))
1190 return (create_register_callback (&list_shutdown, name,
1191 (void *) callback, /* user_data = */ NULL));
1192 } /* int plugin_register_shutdown */
1194 int plugin_register_data_set (const data_set_t *ds)
1196 data_set_t *ds_copy;
1199 if ((data_sets != NULL)
1200 && (c_avl_get (data_sets, ds->type, NULL) == 0))
1202 NOTICE ("Replacing DS `%s' with another version.", ds->type);
1203 plugin_unregister_data_set (ds->type);
1205 else if (data_sets == NULL)
1207 data_sets = c_avl_create ((int (*) (const void *, const void *)) strcmp);
1208 if (data_sets == NULL)
1212 ds_copy = (data_set_t *) malloc (sizeof (data_set_t));
1213 if (ds_copy == NULL)
1215 memcpy(ds_copy, ds, sizeof (data_set_t));
1217 ds_copy->ds = (data_source_t *) malloc (sizeof (data_source_t)
1219 if (ds_copy->ds == NULL)
1225 for (i = 0; i < ds->ds_num; i++)
1226 memcpy (ds_copy->ds + i, ds->ds + i, sizeof (data_source_t));
1228 return (c_avl_insert (data_sets, (void *) ds_copy->type, (void *) ds_copy));
1229 } /* int plugin_register_data_set */
1231 int plugin_register_log (const char *name,
1232 plugin_log_cb callback, user_data_t *ud)
1234 return (create_register_callback (&list_log, name,
1235 (void *) callback, ud));
1236 } /* int plugin_register_log */
1238 int plugin_register_notification (const char *name,
1239 plugin_notification_cb callback, user_data_t *ud)
1241 return (create_register_callback (&list_notification, name,
1242 (void *) callback, ud));
1243 } /* int plugin_register_log */
1245 int plugin_unregister_config (const char *name)
1247 cf_unregister (name);
1249 } /* int plugin_unregister_config */
1251 int plugin_unregister_complex_config (const char *name)
1253 cf_unregister_complex (name);
1255 } /* int plugin_unregister_complex_config */
1257 int plugin_unregister_init (const char *name)
1259 return (plugin_unregister (list_init, name));
1262 int plugin_unregister_read (const char *name) /* {{{ */
1270 pthread_mutex_lock (&read_lock);
1272 if (read_list == NULL)
1274 pthread_mutex_unlock (&read_lock);
1278 le = llist_search (read_list, name);
1281 pthread_mutex_unlock (&read_lock);
1282 WARNING ("plugin_unregister_read: No such read function: %s",
1287 llist_remove (read_list, le);
1290 assert (rf != NULL);
1291 rf->rf_type = RF_REMOVE;
1293 pthread_mutex_unlock (&read_lock);
1295 llentry_destroy (le);
1297 DEBUG ("plugin_unregister_read: Marked `%s' for removal.", name);
1300 } /* }}} int plugin_unregister_read */
1302 static int compare_read_func_group (llentry_t *e, void *ud) /* {{{ */
1304 read_func_t *rf = e->value;
1307 return strcmp (rf->rf_group, (const char *)group);
1308 } /* }}} int compare_read_func_group */
1310 int plugin_unregister_read_group (const char *group) /* {{{ */
1320 pthread_mutex_lock (&read_lock);
1322 if (read_list == NULL)
1324 pthread_mutex_unlock (&read_lock);
1330 le = llist_search_custom (read_list,
1331 compare_read_func_group, (void *)group);
1338 llist_remove (read_list, le);
1341 assert (rf != NULL);
1342 rf->rf_type = RF_REMOVE;
1344 llentry_destroy (le);
1346 DEBUG ("plugin_unregister_read_group: "
1347 "Marked `%s' (group `%s') for removal.",
1348 rf->rf_name, group);
1351 pthread_mutex_unlock (&read_lock);
1355 WARNING ("plugin_unregister_read_group: No such "
1356 "group of read function: %s", group);
1361 } /* }}} int plugin_unregister_read_group */
1363 int plugin_unregister_write (const char *name)
1365 return (plugin_unregister (list_write, name));
1368 int plugin_unregister_flush (const char *name)
1370 return (plugin_unregister (list_flush, name));
1373 int plugin_unregister_missing (const char *name)
1375 return (plugin_unregister (list_missing, name));
1378 int plugin_unregister_shutdown (const char *name)
1380 return (plugin_unregister (list_shutdown, name));
1383 int plugin_unregister_data_set (const char *name)
1387 if (data_sets == NULL)
1390 if (c_avl_remove (data_sets, name, NULL, (void *) &ds) != 0)
1397 } /* int plugin_unregister_data_set */
1399 int plugin_unregister_log (const char *name)
1401 return (plugin_unregister (list_log, name));
1404 int plugin_unregister_notification (const char *name)
1406 return (plugin_unregister (list_notification, name));
1409 void plugin_init_all (void)
1411 const char *chain_name;
1415 /* Init the value cache */
1418 chain_name = global_option_get ("PreCacheChain");
1419 pre_cache_chain = fc_chain_get_by_name (chain_name);
1421 chain_name = global_option_get ("PostCacheChain");
1422 post_cache_chain = fc_chain_get_by_name (chain_name);
1425 char const *tmp = global_option_get ("WriteThreads");
1426 int num = atoi (tmp);
1431 start_write_threads ((size_t) num);
1434 if ((list_init == NULL) && (read_heap == NULL))
1437 /* Calling all init callbacks before checking if read callbacks
1438 * are available allows the init callbacks to register the read
1440 le = llist_head (list_init);
1443 callback_func_t *cf;
1444 plugin_init_cb callback;
1445 plugin_ctx_t old_ctx;
1448 old_ctx = plugin_set_ctx (cf->cf_ctx);
1449 callback = cf->cf_callback;
1450 status = (*callback) ();
1451 plugin_set_ctx (old_ctx);
1455 ERROR ("Initialization of plugin `%s' "
1456 "failed with status %i. "
1457 "Plugin will be unloaded.",
1459 /* Plugins that register read callbacks from the init
1460 * callback should take care of appropriate error
1461 * handling themselves. */
1462 /* FIXME: Unload _all_ functions */
1463 plugin_unregister_read (le->key);
1469 /* Start read-threads */
1470 if (read_heap != NULL)
1474 rt = global_option_get ("ReadThreads");
1477 start_read_threads ((num > 0) ? num : 5);
1479 } /* void plugin_init_all */
1481 /* TODO: Rename this function. */
1482 void plugin_read_all (void)
1484 uc_check_timeout ();
1487 } /* void plugin_read_all */
1489 /* Read function called when the `-T' command line argument is given. */
1490 int plugin_read_all_once (void)
1493 int return_status = 0;
1495 if (read_heap == NULL)
1497 NOTICE ("No read-functions are registered.");
1504 plugin_ctx_t old_ctx;
1506 rf = c_heap_get_root (read_heap);
1510 old_ctx = plugin_set_ctx (rf->rf_ctx);
1512 if (rf->rf_type == RF_SIMPLE)
1514 int (*callback) (void);
1516 callback = rf->rf_callback;
1517 status = (*callback) ();
1521 plugin_read_cb callback;
1523 callback = rf->rf_callback;
1524 status = (*callback) (&rf->rf_udata);
1527 plugin_set_ctx (old_ctx);
1531 NOTICE ("read-function of plugin `%s' failed.",
1536 destroy_callback ((void *) rf);
1539 return (return_status);
1540 } /* int plugin_read_all_once */
1542 int plugin_write (const char *plugin, /* {{{ */
1543 const data_set_t *ds, const value_list_t *vl)
1551 if (list_write == NULL)
1556 ds = plugin_get_ds (vl->type);
1559 ERROR ("plugin_write: Unable to lookup type `%s'.", vl->type);
1569 le = llist_head (list_write);
1572 callback_func_t *cf = le->value;
1573 plugin_write_cb callback;
1575 /* do not switch plugin context; rather keep the context (interval)
1576 * information of the calling read plugin */
1578 DEBUG ("plugin: plugin_write: Writing values via %s.", le->key);
1579 callback = cf->cf_callback;
1580 status = (*callback) (ds, vl, &cf->cf_udata);
1589 if ((success == 0) && (failure != 0))
1594 else /* plugin != NULL */
1596 callback_func_t *cf;
1597 plugin_write_cb callback;
1599 le = llist_head (list_write);
1602 if (strcasecmp (plugin, le->key) == 0)
1613 /* do not switch plugin context; rather keep the context (interval)
1614 * information of the calling read plugin */
1616 DEBUG ("plugin: plugin_write: Writing values via %s.", le->key);
1617 callback = cf->cf_callback;
1618 status = (*callback) (ds, vl, &cf->cf_udata);
1622 } /* }}} int plugin_write */
1624 int plugin_flush (const char *plugin, cdtime_t timeout, const char *identifier)
1628 if (list_flush == NULL)
1631 le = llist_head (list_flush);
1634 callback_func_t *cf;
1635 plugin_flush_cb callback;
1636 plugin_ctx_t old_ctx;
1638 if ((plugin != NULL)
1639 && (strcmp (plugin, le->key) != 0))
1646 old_ctx = plugin_set_ctx (cf->cf_ctx);
1647 callback = cf->cf_callback;
1649 (*callback) (timeout, identifier, &cf->cf_udata);
1651 plugin_set_ctx (old_ctx);
1656 } /* int plugin_flush */
1658 void plugin_shutdown_all (void)
1662 stop_read_threads ();
1664 destroy_all_callbacks (&list_init);
1666 pthread_mutex_lock (&read_lock);
1667 llist_destroy (read_list);
1669 pthread_mutex_unlock (&read_lock);
1671 destroy_read_heap ();
1673 plugin_flush (/* plugin = */ NULL,
1675 /* identifier = */ NULL);
1678 if (list_shutdown != NULL)
1679 le = llist_head (list_shutdown);
1683 callback_func_t *cf;
1684 plugin_shutdown_cb callback;
1685 plugin_ctx_t old_ctx;
1688 old_ctx = plugin_set_ctx (cf->cf_ctx);
1689 callback = cf->cf_callback;
1691 /* Advance the pointer before calling the callback allows
1692 * shutdown functions to unregister themselves. If done the
1693 * other way around the memory `le' points to will be freed
1694 * after callback returns. */
1699 plugin_set_ctx (old_ctx);
1702 stop_write_threads ();
1704 /* Write plugins which use the `user_data' pointer usually need the
1705 * same data available to the flush callback. If this is the case, set
1706 * the free_function to NULL when registering the flush callback and to
1707 * the real free function when registering the write callback. This way
1708 * the data isn't freed twice. */
1709 destroy_all_callbacks (&list_flush);
1710 destroy_all_callbacks (&list_missing);
1711 destroy_all_callbacks (&list_write);
1713 destroy_all_callbacks (&list_notification);
1714 destroy_all_callbacks (&list_shutdown);
1715 destroy_all_callbacks (&list_log);
1716 } /* void plugin_shutdown_all */
1718 int plugin_dispatch_missing (const value_list_t *vl) /* {{{ */
1722 if (list_missing == NULL)
1725 le = llist_head (list_missing);
1728 callback_func_t *cf;
1729 plugin_missing_cb callback;
1730 plugin_ctx_t old_ctx;
1734 old_ctx = plugin_set_ctx (cf->cf_ctx);
1735 callback = cf->cf_callback;
1737 status = (*callback) (vl, &cf->cf_udata);
1738 plugin_set_ctx (old_ctx);
1743 ERROR ("plugin_dispatch_missing: Callback function \"%s\" "
1744 "failed with status %i.",
1757 } /* int }}} plugin_dispatch_missing */
1759 static int plugin_dispatch_values_internal (value_list_t *vl)
1762 static c_complain_t no_write_complaint = C_COMPLAIN_INIT_STATIC;
1764 value_t *saved_values;
1765 int saved_values_len;
1769 int free_meta_data = 0;
1771 if ((vl == NULL) || (vl->type[0] == 0)
1772 || (vl->values == NULL) || (vl->values_len < 1))
1774 ERROR ("plugin_dispatch_values: Invalid value list "
1775 "from plugin %s.", vl->plugin);
1779 /* Free meta data only if the calling function didn't specify any. In
1780 * this case matches and targets may add some and the calling function
1781 * may not expect (and therefore free) that data. */
1782 if (vl->meta == NULL)
1785 if (list_write == NULL)
1786 c_complain_once (LOG_WARNING, &no_write_complaint,
1787 "plugin_dispatch_values: No write callback has been "
1788 "registered. Please load at least one output plugin, "
1789 "if you want the collected data to be stored.");
1791 if (data_sets == NULL)
1793 ERROR ("plugin_dispatch_values: No data sets registered. "
1794 "Could the types database be read? Check "
1795 "your `TypesDB' setting!");
1799 if (c_avl_get (data_sets, vl->type, (void *) &ds) != 0)
1801 char ident[6 * DATA_MAX_NAME_LEN];
1803 FORMAT_VL (ident, sizeof (ident), vl);
1804 INFO ("plugin_dispatch_values: Dataset not found: %s "
1805 "(from \"%s\"), check your types.db!",
1810 /* Assured by plugin_value_list_clone(). The write thread doesn't have
1811 * access to the thread context, so the interval has to be filled in
1812 * already. The time is determined at _enqueue_ time. */
1813 assert (vl->time != 0);
1814 assert (vl->interval != 0);
1816 DEBUG ("plugin_dispatch_values: time = %.3f; interval = %.3f; "
1818 "plugin = %s; plugin_instance = %s; "
1819 "type = %s; type_instance = %s;",
1820 CDTIME_T_TO_DOUBLE (vl->time),
1821 CDTIME_T_TO_DOUBLE (vl->interval),
1823 vl->plugin, vl->plugin_instance,
1824 vl->type, vl->type_instance);
1827 assert (0 == strcmp (ds->type, vl->type));
1829 if (0 != strcmp (ds->type, vl->type))
1830 WARNING ("plugin_dispatch_values: (ds->type = %s) != (vl->type = %s)",
1831 ds->type, vl->type);
1835 assert (ds->ds_num == vl->values_len);
1837 if (ds->ds_num != vl->values_len)
1839 ERROR ("plugin_dispatch_values: ds->type = %s: "
1840 "(ds->ds_num = %i) != "
1841 "(vl->values_len = %i)",
1842 ds->type, ds->ds_num, vl->values_len);
1847 escape_slashes (vl->host, sizeof (vl->host));
1848 escape_slashes (vl->plugin, sizeof (vl->plugin));
1849 escape_slashes (vl->plugin_instance, sizeof (vl->plugin_instance));
1850 escape_slashes (vl->type, sizeof (vl->type));
1851 escape_slashes (vl->type_instance, sizeof (vl->type_instance));
1853 /* Copy the values. This way, we can assure `targets' that they get
1854 * dynamically allocated values, which they can free and replace if
1856 if ((pre_cache_chain != NULL) || (post_cache_chain != NULL))
1858 saved_values = vl->values;
1859 saved_values_len = vl->values_len;
1861 vl->values = (value_t *) calloc (vl->values_len,
1862 sizeof (*vl->values));
1863 if (vl->values == NULL)
1865 ERROR ("plugin_dispatch_values: calloc failed.");
1866 vl->values = saved_values;
1869 memcpy (vl->values, saved_values,
1870 vl->values_len * sizeof (*vl->values));
1872 else /* if ((pre == NULL) && (post == NULL)) */
1874 saved_values = NULL;
1875 saved_values_len = 0;
1878 if (pre_cache_chain != NULL)
1880 status = fc_process_chain (ds, vl, pre_cache_chain);
1883 WARNING ("plugin_dispatch_values: Running the "
1884 "pre-cache chain failed with "
1888 else if (status == FC_TARGET_STOP)
1890 /* Restore the state of the value_list so that plugins
1891 * don't get confused.. */
1892 if (saved_values != NULL)
1895 vl->values = saved_values;
1896 vl->values_len = saved_values_len;
1902 /* Update the value cache */
1905 if (post_cache_chain != NULL)
1907 status = fc_process_chain (ds, vl, post_cache_chain);
1910 WARNING ("plugin_dispatch_values: Running the "
1911 "post-cache chain failed with "
1917 fc_default_action (ds, vl);
1919 /* Restore the state of the value_list so that plugins don't get
1921 if (saved_values != NULL)
1924 vl->values = saved_values;
1925 vl->values_len = saved_values_len;
1928 if ((free_meta_data != 0) && (vl->meta != NULL))
1930 meta_data_destroy (vl->meta);
1935 } /* int plugin_dispatch_values_internal */
1937 int plugin_dispatch_values (value_list_t const *vl)
1941 status = plugin_write_enqueue (vl);
1945 ERROR ("plugin_dispatch_values: plugin_write_enqueue failed "
1946 "with status %i (%s).", status,
1947 sstrerror (status, errbuf, sizeof (errbuf)));
1954 int plugin_dispatch_notification (const notification_t *notif)
1957 /* Possible TODO: Add flap detection here */
1959 DEBUG ("plugin_dispatch_notification: severity = %i; message = %s; "
1960 "time = %.3f; host = %s;",
1961 notif->severity, notif->message,
1962 CDTIME_T_TO_DOUBLE (notif->time), notif->host);
1964 /* Nobody cares for notifications */
1965 if (list_notification == NULL)
1968 le = llist_head (list_notification);
1971 callback_func_t *cf;
1972 plugin_notification_cb callback;
1975 /* do not switch plugin context; rather keep the context
1976 * (interval) information of the calling plugin */
1979 callback = cf->cf_callback;
1980 status = (*callback) (notif, &cf->cf_udata);
1983 WARNING ("plugin_dispatch_notification: Notification "
1984 "callback %s returned %i.",
1992 } /* int plugin_dispatch_notification */
1994 void plugin_log (int level, const char *format, ...)
2001 if (level >= LOG_DEBUG)
2005 va_start (ap, format);
2006 vsnprintf (msg, sizeof (msg), format, ap);
2007 msg[sizeof (msg) - 1] = '\0';
2010 if (list_log == NULL)
2012 fprintf (stderr, "%s\n", msg);
2016 le = llist_head (list_log);
2019 callback_func_t *cf;
2020 plugin_log_cb callback;
2023 callback = cf->cf_callback;
2025 /* do not switch plugin context; rather keep the context
2026 * (interval) information of the calling plugin */
2028 (*callback) (level, msg, &cf->cf_udata);
2032 } /* void plugin_log */
2034 int parse_log_severity (const char *severity)
2038 if ((0 == strcasecmp (severity, "emerg"))
2039 || (0 == strcasecmp (severity, "alert"))
2040 || (0 == strcasecmp (severity, "crit"))
2041 || (0 == strcasecmp (severity, "err")))
2042 log_level = LOG_ERR;
2043 else if (0 == strcasecmp (severity, "warning"))
2044 log_level = LOG_WARNING;
2045 else if (0 == strcasecmp (severity, "notice"))
2046 log_level = LOG_NOTICE;
2047 else if (0 == strcasecmp (severity, "info"))
2048 log_level = LOG_INFO;
2050 else if (0 == strcasecmp (severity, "debug"))
2051 log_level = LOG_DEBUG;
2052 #endif /* COLLECT_DEBUG */
2055 } /* int parse_log_severity */
2057 int parse_notif_severity (const char *severity)
2059 int notif_severity = -1;
2061 if (strcasecmp (severity, "FAILURE") == 0)
2062 notif_severity = NOTIF_FAILURE;
2063 else if (strcmp (severity, "OKAY") == 0)
2064 notif_severity = NOTIF_OKAY;
2065 else if ((strcmp (severity, "WARNING") == 0)
2066 || (strcmp (severity, "WARN") == 0))
2067 notif_severity = NOTIF_WARNING;
2069 return (notif_severity);
2070 } /* int parse_notif_severity */
2072 const data_set_t *plugin_get_ds (const char *name)
2076 if (c_avl_get (data_sets, name, (void *) &ds) != 0)
2078 DEBUG ("No such dataset registered: %s", name);
2083 } /* data_set_t *plugin_get_ds */
2085 static int plugin_notification_meta_add (notification_t *n,
2087 enum notification_meta_type_e type,
2090 notification_meta_t *meta;
2091 notification_meta_t *tail;
2093 if ((n == NULL) || (name == NULL) || (value == NULL))
2095 ERROR ("plugin_notification_meta_add: A pointer is NULL!");
2099 meta = (notification_meta_t *) malloc (sizeof (notification_meta_t));
2102 ERROR ("plugin_notification_meta_add: malloc failed.");
2105 memset (meta, 0, sizeof (notification_meta_t));
2107 sstrncpy (meta->name, name, sizeof (meta->name));
2112 case NM_TYPE_STRING:
2114 meta->nm_value.nm_string = strdup ((const char *) value);
2115 if (meta->nm_value.nm_string == NULL)
2117 ERROR ("plugin_notification_meta_add: strdup failed.");
2123 case NM_TYPE_SIGNED_INT:
2125 meta->nm_value.nm_signed_int = *((int64_t *) value);
2128 case NM_TYPE_UNSIGNED_INT:
2130 meta->nm_value.nm_unsigned_int = *((uint64_t *) value);
2133 case NM_TYPE_DOUBLE:
2135 meta->nm_value.nm_double = *((double *) value);
2138 case NM_TYPE_BOOLEAN:
2140 meta->nm_value.nm_boolean = *((_Bool *) value);
2145 ERROR ("plugin_notification_meta_add: Unknown type: %i", type);
2149 } /* switch (type) */
2153 while ((tail != NULL) && (tail->next != NULL))
2162 } /* int plugin_notification_meta_add */
2164 int plugin_notification_meta_add_string (notification_t *n,
2168 return (plugin_notification_meta_add (n, name, NM_TYPE_STRING, value));
2171 int plugin_notification_meta_add_signed_int (notification_t *n,
2175 return (plugin_notification_meta_add (n, name, NM_TYPE_SIGNED_INT, &value));
2178 int plugin_notification_meta_add_unsigned_int (notification_t *n,
2182 return (plugin_notification_meta_add (n, name, NM_TYPE_UNSIGNED_INT, &value));
2185 int plugin_notification_meta_add_double (notification_t *n,
2189 return (plugin_notification_meta_add (n, name, NM_TYPE_DOUBLE, &value));
2192 int plugin_notification_meta_add_boolean (notification_t *n,
2196 return (plugin_notification_meta_add (n, name, NM_TYPE_BOOLEAN, &value));
2199 int plugin_notification_meta_copy (notification_t *dst,
2200 const notification_t *src)
2202 notification_meta_t *meta;
2204 assert (dst != NULL);
2205 assert (src != NULL);
2206 assert (dst != src);
2207 assert ((src->meta == NULL) || (src->meta != dst->meta));
2209 for (meta = src->meta; meta != NULL; meta = meta->next)
2211 if (meta->type == NM_TYPE_STRING)
2212 plugin_notification_meta_add_string (dst, meta->name,
2213 meta->nm_value.nm_string);
2214 else if (meta->type == NM_TYPE_SIGNED_INT)
2215 plugin_notification_meta_add_signed_int (dst, meta->name,
2216 meta->nm_value.nm_signed_int);
2217 else if (meta->type == NM_TYPE_UNSIGNED_INT)
2218 plugin_notification_meta_add_unsigned_int (dst, meta->name,
2219 meta->nm_value.nm_unsigned_int);
2220 else if (meta->type == NM_TYPE_DOUBLE)
2221 plugin_notification_meta_add_double (dst, meta->name,
2222 meta->nm_value.nm_double);
2223 else if (meta->type == NM_TYPE_BOOLEAN)
2224 plugin_notification_meta_add_boolean (dst, meta->name,
2225 meta->nm_value.nm_boolean);
2229 } /* int plugin_notification_meta_copy */
2231 int plugin_notification_meta_free (notification_meta_t *n)
2233 notification_meta_t *this;
2234 notification_meta_t *next;
2238 ERROR ("plugin_notification_meta_free: n == NULL!");
2243 while (this != NULL)
2247 if (this->type == NM_TYPE_STRING)
2249 free ((char *)this->nm_value.nm_string);
2250 this->nm_value.nm_string = NULL;
2258 } /* int plugin_notification_meta_free */
2260 static void plugin_ctx_destructor (void *ctx)
2263 } /* void plugin_ctx_destructor */
2265 static plugin_ctx_t ctx_init = { /* interval = */ 0 };
2267 static plugin_ctx_t *plugin_ctx_create (void)
2271 ctx = malloc (sizeof (*ctx));
2274 ERROR ("Failed to allocate plugin context: %s",
2275 sstrerror (errno, errbuf, sizeof (errbuf)));
2280 assert (plugin_ctx_key_initialized);
2281 pthread_setspecific (plugin_ctx_key, ctx);
2282 DEBUG("Created new plugin context.");
2284 } /* int plugin_ctx_create */
2286 void plugin_init_ctx (void)
2288 pthread_key_create (&plugin_ctx_key, plugin_ctx_destructor);
2289 plugin_ctx_key_initialized = 1;
2290 } /* void plugin_init_ctx */
2292 plugin_ctx_t plugin_get_ctx (void)
2296 assert (plugin_ctx_key_initialized);
2297 ctx = pthread_getspecific (plugin_ctx_key);
2300 ctx = plugin_ctx_create ();
2301 /* this must no happen -- exit() instead? */
2307 } /* plugin_ctx_t plugin_get_ctx */
2309 plugin_ctx_t plugin_set_ctx (plugin_ctx_t ctx)
2314 assert (plugin_ctx_key_initialized);
2315 c = pthread_getspecific (plugin_ctx_key);
2318 c = plugin_ctx_create ();
2319 /* this must no happen -- exit() instead? */
2328 } /* void plugin_set_ctx */
2330 cdtime_t plugin_get_interval (void)
2334 interval = plugin_get_ctx().interval;
2338 return cf_get_default_interval ();
2339 } /* cdtime_t plugin_get_interval */
2343 void *(*start_routine) (void *);
2347 static void *plugin_thread_start (void *arg)
2349 plugin_thread_t *plugin_thread = arg;
2351 void *(*start_routine) (void *) = plugin_thread->start_routine;
2352 void *plugin_arg = plugin_thread->arg;
2354 plugin_set_ctx (plugin_thread->ctx);
2356 free (plugin_thread);
2358 return start_routine (plugin_arg);
2359 } /* void *plugin_thread_start */
2361 int plugin_thread_create (pthread_t *thread, const pthread_attr_t *attr,
2362 void *(*start_routine) (void *), void *arg)
2364 plugin_thread_t *plugin_thread;
2366 plugin_thread = malloc (sizeof (*plugin_thread));
2367 if (plugin_thread == NULL)
2370 plugin_thread->ctx = plugin_get_ctx ();
2371 plugin_thread->start_routine = start_routine;
2372 plugin_thread->arg = arg;
2374 return pthread_create (thread, attr,
2375 plugin_thread_start, plugin_thread);
2376 } /* int plugin_thread_create */
2378 /* vim: set sw=8 ts=8 noet fdm=marker : */