beea288afc6bc154cedadd62de83da0b7558979a
1 /**
2 * collectd - src/perl.c
3 * Copyright (C) 2007, 2008 Sebastian Harl
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; only version 2 of the License is applicable.
8 *
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.
13 *
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
17 *
18 * Author:
19 * Sebastian Harl <sh at tokkee.org>
20 **/
22 /*
23 * This plugin embeds a Perl interpreter into collectd and provides an
24 * interface for collectd plugins written in perl.
25 */
27 /* do not automatically get the thread specific perl interpreter */
28 #define PERL_NO_GET_CONTEXT
30 #include "collectd.h"
32 #include "configfile.h"
34 #include <EXTERN.h>
35 #include <perl.h>
37 #include <XSUB.h>
39 /* Some versions of Perl define their own version of DEBUG... :-/ */
40 #ifdef DEBUG
41 # undef DEBUG
42 #endif /* DEBUG */
44 /* ... while we want the definition found in plugin.h. */
45 #include "plugin.h"
46 #include "common.h"
48 #include <pthread.h>
50 #if !defined(USE_ITHREADS)
51 # error "Perl does not support ithreads!"
52 #endif /* !defined(USE_ITHREADS) */
54 /* clear the Perl sub's stack frame
55 * (this should only be used inside an XSUB) */
56 #define CLEAR_STACK_FRAME PL_stack_sp = PL_stack_base + *PL_markstack_ptr
58 #define PLUGIN_INIT 0
59 #define PLUGIN_READ 1
60 #define PLUGIN_WRITE 2
61 #define PLUGIN_SHUTDOWN 3
62 #define PLUGIN_LOG 4
63 #define PLUGIN_NOTIF 5
64 #define PLUGIN_FLUSH 6
66 #define PLUGIN_TYPES 7
68 #define PLUGIN_DATASET 255
70 #define log_debug(...) DEBUG ("perl: " __VA_ARGS__)
71 #define log_info(...) INFO ("perl: " __VA_ARGS__)
72 #define log_warn(...) WARNING ("perl: " __VA_ARGS__)
73 #define log_err(...) ERROR ("perl: " __VA_ARGS__)
75 /* this is defined in DynaLoader.a */
76 void boot_DynaLoader (PerlInterpreter *, CV *);
78 static XS (Collectd_plugin_register_ds);
79 static XS (Collectd_plugin_unregister_ds);
80 static XS (Collectd_plugin_dispatch_values);
81 static XS (Collectd_plugin_dispatch_notification);
82 static XS (Collectd_plugin_log);
83 static XS (Collectd_call_by_name);
85 /*
86 * private data types
87 */
89 typedef struct c_ithread_s {
90 /* the thread's Perl interpreter */
91 PerlInterpreter *interp;
93 /* double linked list of threads */
94 struct c_ithread_s *prev;
95 struct c_ithread_s *next;
96 } c_ithread_t;
98 typedef struct {
99 c_ithread_t *head;
100 c_ithread_t *tail;
102 #if COLLECT_DEBUG
103 /* some usage stats */
104 int number_of_threads;
105 #endif /* COLLECT_DEBUG */
107 pthread_mutex_t mutex;
108 } c_ithread_list_t;
110 /*
111 * private variables
112 */
114 /* if perl_threads != NULL perl_threads->head must
115 * point to the "base" thread */
116 static c_ithread_list_t *perl_threads = NULL;
118 /* the key used to store each pthread's ithread */
119 static pthread_key_t perl_thr_key;
121 static int perl_argc = 0;
122 static char **perl_argv = NULL;
124 static char base_name[DATA_MAX_NAME_LEN] = "";
126 static struct {
127 char name[64];
128 XS ((*f));
129 } api[] =
130 {
131 { "Collectd::plugin_register_data_set", Collectd_plugin_register_ds },
132 { "Collectd::plugin_unregister_data_set", Collectd_plugin_unregister_ds },
133 { "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
134 { "Collectd::plugin_dispatch_notification",
135 Collectd_plugin_dispatch_notification },
136 { "Collectd::plugin_log", Collectd_plugin_log },
137 { "Collectd::call_by_name", Collectd_call_by_name },
138 { "", NULL }
139 };
141 struct {
142 char name[64];
143 int value;
144 } constants[] =
145 {
146 { "Collectd::TYPE_INIT", PLUGIN_INIT },
147 { "Collectd::TYPE_READ", PLUGIN_READ },
148 { "Collectd::TYPE_WRITE", PLUGIN_WRITE },
149 { "Collectd::TYPE_SHUTDOWN", PLUGIN_SHUTDOWN },
150 { "Collectd::TYPE_LOG", PLUGIN_LOG },
151 { "Collectd::TYPE_NOTIF", PLUGIN_NOTIF },
152 { "Collectd::TYPE_FLUSH", PLUGIN_FLUSH },
153 { "Collectd::TYPE_DATASET", PLUGIN_DATASET },
154 { "Collectd::DS_TYPE_COUNTER", DS_TYPE_COUNTER },
155 { "Collectd::DS_TYPE_GAUGE", DS_TYPE_GAUGE },
156 { "Collectd::LOG_ERR", LOG_ERR },
157 { "Collectd::LOG_WARNING", LOG_WARNING },
158 { "Collectd::LOG_NOTICE", LOG_NOTICE },
159 { "Collectd::LOG_INFO", LOG_INFO },
160 { "Collectd::LOG_DEBUG", LOG_DEBUG },
161 { "Collectd::NOTIF_FAILURE", NOTIF_FAILURE },
162 { "Collectd::NOTIF_WARNING", NOTIF_WARNING },
163 { "Collectd::NOTIF_OKAY", NOTIF_OKAY },
164 { "", 0 }
165 };
167 struct {
168 char name[64];
169 char *var;
170 } g_strings[] =
171 {
172 { "Collectd::hostname_g", hostname_g },
173 { "", NULL }
174 };
176 struct {
177 char name[64];
178 int *var;
179 } g_integers[] =
180 {
181 { "Collectd::interval_g", &interval_g },
182 { "", NULL }
183 };
185 /*
186 * Helper functions for data type conversion.
187 */
189 /*
190 * data source:
191 * [
192 * {
193 * name => $ds_name,
194 * type => $ds_type,
195 * min => $ds_min,
196 * max => $ds_max
197 * },
198 * ...
199 * ]
200 */
201 static int hv2data_source (pTHX_ HV *hash, data_source_t *ds)
202 {
203 SV **tmp = NULL;
205 if ((NULL == hash) || (NULL == ds))
206 return -1;
208 if (NULL != (tmp = hv_fetch (hash, "name", 4, 0))) {
209 strncpy (ds->name, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
210 ds->name[DATA_MAX_NAME_LEN - 1] = '\0';
211 }
212 else {
213 log_err ("hv2data_source: No DS name given.");
214 return -1;
215 }
217 if (NULL != (tmp = hv_fetch (hash, "type", 4, 0))) {
218 ds->type = SvIV (*tmp);
220 if ((DS_TYPE_COUNTER != ds->type) && (DS_TYPE_GAUGE != ds->type)) {
221 log_err ("hv2data_source: Invalid DS type.");
222 return -1;
223 }
224 }
225 else {
226 ds->type = DS_TYPE_COUNTER;
227 }
229 if (NULL != (tmp = hv_fetch (hash, "min", 3, 0)))
230 ds->min = SvNV (*tmp);
231 else
232 ds->min = NAN;
234 if (NULL != (tmp = hv_fetch (hash, "max", 3, 0)))
235 ds->max = SvNV (*tmp);
236 else
237 ds->max = NAN;
238 return 0;
239 } /* static data_source_t *hv2data_source (HV *) */
241 static int av2value (pTHX_ char *name, AV *array, value_t *value, int len)
242 {
243 const data_set_t *ds;
245 int i = 0;
247 if ((NULL == name) || (NULL == array) || (NULL == value))
248 return -1;
250 if (av_len (array) < len - 1)
251 len = av_len (array) + 1;
253 if (0 >= len)
254 return -1;
256 ds = plugin_get_ds (name);
257 if (NULL == ds) {
258 log_err ("av2value: Unknown dataset \"%s\"", name);
259 return -1;
260 }
262 if (ds->ds_num < len) {
263 log_warn ("av2value: Value length exceeds data set length.");
264 len = ds->ds_num;
265 }
267 for (i = 0; i < len; ++i) {
268 SV **tmp = av_fetch (array, i, 0);
270 if (NULL != tmp) {
271 if (DS_TYPE_COUNTER == ds->ds[i].type)
272 value[i].counter = SvIV (*tmp);
273 else
274 value[i].gauge = SvNV (*tmp);
275 }
276 else {
277 return -1;
278 }
279 }
280 return len;
281 } /* static int av2value (char *, AV *, value_t *, int) */
283 static int data_set2av (pTHX_ data_set_t *ds, AV *array)
284 {
285 int i = 0;
287 if ((NULL == ds) || (NULL == array))
288 return -1;
290 av_extend (array, ds->ds_num);
292 for (i = 0; i < ds->ds_num; ++i) {
293 HV *source = newHV ();
295 if (NULL == hv_store (source, "name", 4,
296 newSVpv (ds->ds[i].name, 0), 0))
297 return -1;
299 if (NULL == hv_store (source, "type", 4, newSViv (ds->ds[i].type), 0))
300 return -1;
302 if (! isnan (ds->ds[i].min))
303 if (NULL == hv_store (source, "min", 3,
304 newSVnv (ds->ds[i].min), 0))
305 return -1;
307 if (! isnan (ds->ds[i].max))
308 if (NULL == hv_store (source, "max", 3,
309 newSVnv (ds->ds[i].max), 0))
310 return -1;
312 if (NULL == av_store (array, i, newRV_noinc ((SV *)source)))
313 return -1;
314 }
315 return 0;
316 } /* static int data_set2av (data_set_t *, AV *) */
318 static int value_list2hv (pTHX_ value_list_t *vl, data_set_t *ds, HV *hash)
319 {
320 AV *values = NULL;
322 int i = 0;
323 int len = 0;
325 if ((NULL == vl) || (NULL == ds) || (NULL == hash))
326 return -1;
328 len = vl->values_len;
330 if (ds->ds_num < len) {
331 log_warn ("value2av: Value length exceeds data set length.");
332 len = ds->ds_num;
333 }
335 values = newAV ();
336 av_extend (values, len - 1);
338 for (i = 0; i < len; ++i) {
339 SV *val = NULL;
341 if (DS_TYPE_COUNTER == ds->ds[i].type)
342 val = newSViv (vl->values[i].counter);
343 else
344 val = newSVnv (vl->values[i].gauge);
346 if (NULL == av_store (values, i, val)) {
347 av_undef (values);
348 return -1;
349 }
350 }
352 if (NULL == hv_store (hash, "values", 6, newRV_noinc ((SV *)values), 0))
353 return -1;
355 if (0 != vl->time)
356 if (NULL == hv_store (hash, "time", 4, newSViv (vl->time), 0))
357 return -1;
359 if ('\0' != vl->host[0])
360 if (NULL == hv_store (hash, "host", 4, newSVpv (vl->host, 0), 0))
361 return -1;
363 if ('\0' != vl->plugin[0])
364 if (NULL == hv_store (hash, "plugin", 6, newSVpv (vl->plugin, 0), 0))
365 return -1;
367 if ('\0' != vl->plugin_instance[0])
368 if (NULL == hv_store (hash, "plugin_instance", 15,
369 newSVpv (vl->plugin_instance, 0), 0))
370 return -1;
372 if ('\0' != vl->type_instance[0])
373 if (NULL == hv_store (hash, "type_instance", 13,
374 newSVpv (vl->type_instance, 0), 0))
375 return -1;
376 return 0;
377 } /* static int value2av (value_list_t *, data_set_t *, HV *) */
379 static int notification2hv (pTHX_ notification_t *n, HV *hash)
380 {
381 if (NULL == hv_store (hash, "severity", 8, newSViv (n->severity), 0))
382 return -1;
384 if (0 != n->time)
385 if (NULL == hv_store (hash, "time", 4, newSViv (n->time), 0))
386 return -1;
388 if ('\0' != *n->message)
389 if (NULL == hv_store (hash, "message", 7, newSVpv (n->message, 0), 0))
390 return -1;
392 if ('\0' != *n->host)
393 if (NULL == hv_store (hash, "host", 4, newSVpv (n->host, 0), 0))
394 return -1;
396 if ('\0' != *n->plugin)
397 if (NULL == hv_store (hash, "plugin", 6, newSVpv (n->plugin, 0), 0))
398 return -1;
400 if ('\0' != *n->plugin_instance)
401 if (NULL == hv_store (hash, "plugin_instance", 15,
402 newSVpv (n->plugin_instance, 0), 0))
403 return -1;
405 if ('\0' != *n->type)
406 if (NULL == hv_store (hash, "type", 4, newSVpv (n->type, 0), 0))
407 return -1;
409 if ('\0' != *n->type_instance)
410 if (NULL == hv_store (hash, "type_instance", 13,
411 newSVpv (n->type_instance, 0), 0))
412 return -1;
413 return 0;
414 } /* static int notification2hv (notification_t *, HV *) */
416 /*
417 * Internal functions.
418 */
420 static char *get_module_name (char *buf, size_t buf_len, const char *module) {
421 int status = 0;
422 if (base_name[0] == '\0')
423 status = snprintf (buf, buf_len, "%s", module);
424 else
425 status = snprintf (buf, buf_len, "%s::%s", base_name, module);
426 if ((status < 0) || ((unsigned int)status >= buf_len))
427 return (NULL);
428 buf[buf_len - 1] = '\0';
429 return (buf);
430 } /* char *get_module_name */
432 /*
433 * Add a plugin's data set definition.
434 */
435 static int pplugin_register_data_set (pTHX_ char *name, AV *dataset)
436 {
437 int len = -1;
438 int ret = 0;
439 int i = 0;
441 data_source_t *ds = NULL;
442 data_set_t *set = NULL;
444 if ((NULL == name) || (NULL == dataset))
445 return -1;
447 len = av_len (dataset);
449 if (-1 == len)
450 return -1;
452 ds = (data_source_t *)smalloc ((len + 1) * sizeof (data_source_t));
453 set = (data_set_t *)smalloc (sizeof (data_set_t));
455 for (i = 0; i <= len; ++i) {
456 SV **elem = av_fetch (dataset, i, 0);
458 if (NULL == elem)
459 return -1;
461 if (! (SvROK (*elem) && (SVt_PVHV == SvTYPE (SvRV (*elem))))) {
462 log_err ("pplugin_register_data_set: Invalid data source.");
463 return -1;
464 }
466 if (-1 == hv2data_source (aTHX_ (HV *)SvRV (*elem), &ds[i]))
467 return -1;
469 log_debug ("pplugin_register_data_set: "
470 "DS.name = \"%s\", DS.type = %i, DS.min = %f, DS.max = %f",
471 ds[i].name, ds[i].type, ds[i].min, ds[i].max);
472 }
474 strncpy (set->type, name, DATA_MAX_NAME_LEN);
475 set->type[DATA_MAX_NAME_LEN - 1] = '\0';
477 set->ds_num = len + 1;
478 set->ds = ds;
480 ret = plugin_register_data_set (set);
482 free (ds);
483 free (set);
484 return ret;
485 } /* static int pplugin_register_data_set (char *, SV *) */
487 /*
488 * Remove a plugin's data set definition.
489 */
490 static int pplugin_unregister_data_set (char *name)
491 {
492 if (NULL == name)
493 return 0;
494 return plugin_unregister_data_set (name);
495 } /* static int pplugin_unregister_data_set (char *) */
497 /*
498 * Submit the values to the write functions.
499 *
500 * value list:
501 * {
502 * values => [ @values ],
503 * time => $time,
504 * host => $host,
505 * plugin => $plugin,
506 * plugin_instance => $pinstance,
507 * type_instance => $tinstance,
508 * }
509 */
510 static int pplugin_dispatch_values (pTHX_ char *name, HV *values)
511 {
512 value_list_t list = VALUE_LIST_INIT;
513 value_t *val = NULL;
515 SV **tmp = NULL;
517 int ret = 0;
519 if ((NULL == name) || (NULL == values))
520 return -1;
522 if ((NULL == (tmp = hv_fetch (values, "values", 6, 0)))
523 || (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
524 log_err ("pplugin_dispatch_values: No valid values given.");
525 return -1;
526 }
528 {
529 AV *array = (AV *)SvRV (*tmp);
530 int len = av_len (array) + 1;
532 if (len <= 0)
533 return -1;
535 val = (value_t *)smalloc (len * sizeof (value_t));
537 list.values_len = av2value (aTHX_ name, (AV *)SvRV (*tmp), val, len);
538 list.values = val;
540 if (-1 == list.values_len) {
541 sfree (val);
542 return -1;
543 }
544 }
546 if (NULL != (tmp = hv_fetch (values, "time", 4, 0))) {
547 list.time = (time_t)SvIV (*tmp);
548 }
549 else {
550 list.time = time (NULL);
551 }
553 if (NULL != (tmp = hv_fetch (values, "host", 4, 0))) {
554 strncpy (list.host, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
555 list.host[DATA_MAX_NAME_LEN - 1] = '\0';
556 }
557 else {
558 strcpy (list.host, hostname_g);
559 }
561 if (NULL != (tmp = hv_fetch (values, "plugin", 6, 0))) {
562 strncpy (list.plugin, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
563 list.plugin[DATA_MAX_NAME_LEN - 1] = '\0';
564 }
566 if (NULL != (tmp = hv_fetch (values, "plugin_instance", 15, 0))) {
567 strncpy (list.plugin_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
568 list.plugin_instance[DATA_MAX_NAME_LEN - 1] = '\0';
569 }
571 if (NULL != (tmp = hv_fetch (values, "type_instance", 13, 0))) {
572 strncpy (list.type_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
573 list.type_instance[DATA_MAX_NAME_LEN - 1] = '\0';
574 }
576 ret = plugin_dispatch_values (name, &list);
578 sfree (val);
579 return ret;
580 } /* static int pplugin_dispatch_values (char *, HV *) */
582 /*
583 * Dispatch a notification.
584 *
585 * notification:
586 * {
587 * severity => $severity,
588 * time => $time,
589 * message => $msg,
590 * host => $host,
591 * plugin => $plugin,
592 * type => $type,
593 * plugin_instance => $instance,
594 * type_instance => $type_instance
595 * }
596 */
597 static int pplugin_dispatch_notification (pTHX_ HV *notif)
598 {
599 notification_t n;
601 SV **tmp = NULL;
603 if (NULL == notif)
604 return -1;
606 memset (&n, 0, sizeof (n));
608 if (NULL != (tmp = hv_fetch (notif, "severity", 8, 0)))
609 n.severity = SvIV (*tmp);
610 else
611 n.severity = NOTIF_FAILURE;
613 if (NULL != (tmp = hv_fetch (notif, "time", 4, 0)))
614 n.time = (time_t)SvIV (*tmp);
615 else
616 n.time = time (NULL);
618 if (NULL != (tmp = hv_fetch (notif, "message", 7, 0)))
619 strncpy (n.message, SvPV_nolen (*tmp), sizeof (n.message));
620 n.message[sizeof (n.message) - 1] = '\0';
622 if (NULL != (tmp = hv_fetch (notif, "host", 4, 0)))
623 strncpy (n.host, SvPV_nolen (*tmp), sizeof (n.host));
624 else
625 strncpy (n.host, hostname_g, sizeof (n.host));
626 n.host[sizeof (n.host) - 1] = '\0';
628 if (NULL != (tmp = hv_fetch (notif, "plugin", 6, 0)))
629 strncpy (n.plugin, SvPV_nolen (*tmp), sizeof (n.plugin));
630 n.plugin[sizeof (n.plugin) - 1] = '\0';
632 if (NULL != (tmp = hv_fetch (notif, "plugin_instance", 15, 0)))
633 strncpy (n.plugin_instance, SvPV_nolen (*tmp),
634 sizeof (n.plugin_instance));
635 n.plugin_instance[sizeof (n.plugin_instance) - 1] = '\0';
637 if (NULL != (tmp = hv_fetch (notif, "type", 4, 0)))
638 strncpy (n.type, SvPV_nolen (*tmp), sizeof (n.type));
639 n.type[sizeof (n.type) - 1] = '\0';
641 if (NULL != (tmp = hv_fetch (notif, "type_instance", 13, 0)))
642 strncpy (n.type_instance, SvPV_nolen (*tmp), sizeof (n.type_instance));
643 n.type_instance[sizeof (n.type_instance) - 1] = '\0';
644 return plugin_dispatch_notification (&n);
645 } /* static int pplugin_dispatch_notification (HV *) */
647 /*
648 * Call all working functions of the given type.
649 */
650 static int pplugin_call_all (pTHX_ int type, ...)
651 {
652 int retvals = 0;
654 va_list ap;
655 int ret = 0;
657 dSP;
659 if ((type < 0) || (type >= PLUGIN_TYPES))
660 return -1;
662 va_start (ap, type);
664 ENTER;
665 SAVETMPS;
667 PUSHMARK (SP);
669 XPUSHs (sv_2mortal (newSViv ((IV)type)));
671 if (PLUGIN_WRITE == type) {
672 /*
673 * $_[0] = $plugin_type;
674 *
675 * $_[1] =
676 * [
677 * {
678 * name => $ds_name,
679 * type => $ds_type,
680 * min => $ds_min,
681 * max => $ds_max
682 * },
683 * ...
684 * ];
685 *
686 * $_[2] =
687 * {
688 * values => [ $v1, ... ],
689 * time => $time,
690 * host => $hostname,
691 * plugin => $plugin,
692 * plugin_instance => $instance,
693 * type_instance => $type_instance
694 * };
695 */
696 data_set_t *ds;
697 value_list_t *vl;
699 AV *pds = newAV ();
700 HV *pvl = newHV ();
702 ds = va_arg (ap, data_set_t *);
703 vl = va_arg (ap, value_list_t *);
705 if (-1 == data_set2av (aTHX_ ds, pds)) {
706 av_clear (pds);
707 av_undef (pds);
708 pds = Nullav;
709 ret = -1;
710 }
712 if (-1 == value_list2hv (aTHX_ vl, ds, pvl)) {
713 hv_clear (pvl);
714 hv_undef (pvl);
715 pvl = Nullhv;
716 ret = -1;
717 }
719 XPUSHs (sv_2mortal (newSVpv (ds->type, 0)));
720 XPUSHs (sv_2mortal (newRV_noinc ((SV *)pds)));
721 XPUSHs (sv_2mortal (newRV_noinc ((SV *)pvl)));
722 }
723 else if (PLUGIN_LOG == type) {
724 /*
725 * $_[0] = $level;
726 *
727 * $_[1] = $message;
728 */
729 XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
730 XPUSHs (sv_2mortal (newSVpv (va_arg (ap, char *), 0)));
731 }
732 else if (PLUGIN_NOTIF == type) {
733 /*
734 * $_[0] =
735 * {
736 * severity => $severity,
737 * time => $time,
738 * message => $msg,
739 * host => $host,
740 * plugin => $plugin,
741 * type => $type,
742 * plugin_instance => $instance,
743 * type_instance => $type_instance
744 * };
745 */
746 notification_t *n;
747 HV *notif = newHV ();
749 n = va_arg (ap, notification_t *);
751 if (-1 == notification2hv (aTHX_ n, notif)) {
752 hv_clear (notif);
753 hv_undef (notif);
754 notif = Nullhv;
755 ret = -1;
756 }
758 XPUSHs (sv_2mortal (newRV_noinc ((SV *)notif)));
759 }
760 else if (PLUGIN_FLUSH == type) {
761 /*
762 * $_[0] = $timeout;
763 */
764 XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
765 }
767 PUTBACK;
769 retvals = call_pv ("Collectd::plugin_call_all", G_SCALAR);
771 SPAGAIN;
772 if (0 < retvals) {
773 SV *tmp = POPs;
774 if (! SvTRUE (tmp))
775 ret = -1;
776 }
778 PUTBACK;
779 FREETMPS;
780 LEAVE;
782 va_end (ap);
783 return ret;
784 } /* static int pplugin_call_all (int, ...) */
786 /*
787 * Exported Perl API.
788 */
790 /*
791 * Collectd::plugin_register_data_set (type, dataset).
792 *
793 * type:
794 * type of the dataset
795 *
796 * dataset:
797 * dataset to be registered
798 */
799 static XS (Collectd_plugin_register_ds)
800 {
801 SV *data = NULL;
802 int ret = 0;
804 dXSARGS;
806 if (2 != items) {
807 log_err ("Usage: Collectd::plugin_register_data_set(type, dataset)");
808 XSRETURN_EMPTY;
809 }
811 log_debug ("Collectd::plugin_register_data_set: "
812 "type = \"%s\", dataset = \"%s\"",
813 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
815 data = ST (1);
817 if (SvROK (data) && (SVt_PVAV == SvTYPE (SvRV (data)))) {
818 ret = pplugin_register_data_set (aTHX_ SvPV_nolen (ST (0)),
819 (AV *)SvRV (data));
820 }
821 else {
822 log_err ("Collectd::plugin_register_data_set: Invalid data.");
823 XSRETURN_EMPTY;
824 }
826 if (0 == ret)
827 XSRETURN_YES;
828 else
829 XSRETURN_EMPTY;
830 } /* static XS (Collectd_plugin_register_ds) */
832 /*
833 * Collectd::plugin_unregister_data_set (type).
834 *
835 * type:
836 * type of the dataset
837 */
838 static XS (Collectd_plugin_unregister_ds)
839 {
840 dXSARGS;
842 if (1 != items) {
843 log_err ("Usage: Collectd::plugin_unregister_data_set(type)");
844 XSRETURN_EMPTY;
845 }
847 log_debug ("Collectd::plugin_unregister_data_set: type = \"%s\"",
848 SvPV_nolen (ST (0)));
850 if (0 == pplugin_unregister_data_set (SvPV_nolen (ST (0))))
851 XSRETURN_YES;
852 else
853 XSRETURN_EMPTY;
854 } /* static XS (Collectd_plugin_register_ds) */
856 /*
857 * Collectd::plugin_dispatch_values (name, values).
858 *
859 * name:
860 * name of the plugin
861 *
862 * values:
863 * value list to submit
864 */
865 static XS (Collectd_plugin_dispatch_values)
866 {
867 SV *values = NULL;
869 int ret = 0;
871 dXSARGS;
873 if (2 != items) {
874 log_err ("Usage: Collectd::plugin_dispatch_values(name, values)");
875 XSRETURN_EMPTY;
876 }
878 log_debug ("Collectd::plugin_dispatch_values: "
879 "name = \"%s\", values=\"%s\"",
880 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
882 values = ST (1);
884 if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
885 log_err ("Collectd::plugin_dispatch_values: Invalid values.");
886 XSRETURN_EMPTY;
887 }
889 if ((NULL == ST (0)) || (NULL == values))
890 XSRETURN_EMPTY;
892 ret = pplugin_dispatch_values (aTHX_ SvPV_nolen (ST (0)),
893 (HV *)SvRV (values));
895 if (0 == ret)
896 XSRETURN_YES;
897 else
898 XSRETURN_EMPTY;
899 } /* static XS (Collectd_plugin_dispatch_values) */
901 /*
902 * Collectd::plugin_dispatch_notification (notif).
903 *
904 * notif:
905 * notification to dispatch
906 */
907 static XS (Collectd_plugin_dispatch_notification)
908 {
909 SV *notif = NULL;
911 int ret = 0;
913 dXSARGS;
915 if (1 != items) {
916 log_err ("Usage: Collectd::plugin_dispatch_notification(notif)");
917 XSRETURN_EMPTY;
918 }
920 log_debug ("Collectd::plugin_dispatch_notification: notif = \"%s\"",
921 SvPV_nolen (ST (0)));
923 notif = ST (0);
925 if (! (SvROK (notif) && (SVt_PVHV == SvTYPE (SvRV (notif))))) {
926 log_err ("Collectd::plugin_dispatch_notification: Invalid notif.");
927 XSRETURN_EMPTY;
928 }
930 ret = pplugin_dispatch_notification (aTHX_ (HV *)SvRV (notif));
932 if (0 == ret)
933 XSRETURN_YES;
934 else
935 XSRETURN_EMPTY;
936 } /* static XS (Collectd_plugin_dispatch_notification) */
938 /*
939 * Collectd::plugin_log (level, message).
940 *
941 * level:
942 * log level (LOG_DEBUG, ... LOG_ERR)
943 *
944 * message:
945 * log message
946 */
947 static XS (Collectd_plugin_log)
948 {
949 dXSARGS;
951 if (2 != items) {
952 log_err ("Usage: Collectd::plugin_log(level, message)");
953 XSRETURN_EMPTY;
954 }
956 plugin_log (SvIV (ST (0)), SvPV_nolen (ST (1)));
957 XSRETURN_YES;
958 } /* static XS (Collectd_plugin_log) */
960 /*
961 * Collectd::call_by_name (...).
962 *
963 * Call a Perl sub identified by its name passed through $Collectd::cb_name.
964 */
965 static XS (Collectd_call_by_name)
966 {
967 SV *tmp = NULL;
968 char *name = NULL;
970 if (NULL == (tmp = get_sv ("Collectd::cb_name", 0))) {
971 sv_setpv (get_sv ("@", 1), "cb_name has not been set");
972 CLEAR_STACK_FRAME;
973 return;
974 }
976 name = SvPV_nolen (tmp);
978 if (NULL == get_cv (name, 0)) {
979 sv_setpvf (get_sv ("@", 1), "unknown callback \"%s\"", name);
980 CLEAR_STACK_FRAME;
981 return;
982 }
984 /* simply pass on the subroutine call without touching the stack,
985 * thus leaving any arguments and return values in place */
986 call_pv (name, 0);
987 } /* static XS (Collectd_call_by_name) */
989 /*
990 * collectd's perl interpreter based thread implementation.
991 *
992 * This has been inspired by Perl's ithreads introduced in version 5.6.0.
993 */
995 /* must be called with perl_threads->mutex locked */
996 static void c_ithread_destroy (c_ithread_t *ithread)
997 {
998 dTHXa (ithread->interp);
1000 assert (NULL != perl_threads);
1002 PERL_SET_CONTEXT (aTHX);
1003 log_debug ("Shutting down Perl interpreter %p...", aTHX);
1005 #if COLLECT_DEBUG
1006 sv_report_used ();
1008 --perl_threads->number_of_threads;
1009 #endif /* COLLECT_DEBUG */
1011 perl_destruct (aTHX);
1012 perl_free (aTHX);
1014 if (NULL == ithread->prev)
1015 perl_threads->head = ithread->next;
1016 else
1017 ithread->prev->next = ithread->next;
1019 if (NULL == ithread->next)
1020 perl_threads->tail = ithread->prev;
1021 else
1022 ithread->next->prev = ithread->prev;
1024 sfree (ithread);
1025 return;
1026 } /* static void c_ithread_destroy (c_ithread_t *) */
1028 static void c_ithread_destructor (void *arg)
1029 {
1030 c_ithread_t *ithread = (c_ithread_t *)arg;
1031 c_ithread_t *t = NULL;
1033 if (NULL == perl_threads)
1034 return;
1036 pthread_mutex_lock (&perl_threads->mutex);
1038 for (t = perl_threads->head; NULL != t; t = t->next)
1039 if (t == ithread)
1040 break;
1042 /* the ithread no longer exists */
1043 if (NULL == t)
1044 return;
1046 c_ithread_destroy (ithread);
1048 pthread_mutex_unlock (&perl_threads->mutex);
1049 return;
1050 } /* static void c_ithread_destructor (void *) */
1052 /* must be called with perl_threads->mutex locked */
1053 static c_ithread_t *c_ithread_create (PerlInterpreter *base)
1054 {
1055 c_ithread_t *t = NULL;
1056 dTHXa (NULL);
1058 assert (NULL != perl_threads);
1060 t = (c_ithread_t *)smalloc (sizeof (c_ithread_t));
1061 memset (t, 0, sizeof (c_ithread_t));
1063 t->interp = (NULL == base)
1064 ? NULL
1065 : perl_clone (base, CLONEf_KEEP_PTR_TABLE);
1067 aTHX = t->interp;
1069 if (NULL != base) {
1070 av_clear (PL_endav);
1071 av_undef (PL_endav);
1072 PL_endav = Nullav;
1073 }
1075 #if COLLECT_DEBUG
1076 ++perl_threads->number_of_threads;
1077 #endif /* COLLECT_DEBUG */
1079 t->next = NULL;
1081 if (NULL == perl_threads->tail) {
1082 perl_threads->head = t;
1083 t->prev = NULL;
1084 }
1085 else {
1086 perl_threads->tail->next = t;
1087 t->prev = perl_threads->tail;
1088 }
1090 perl_threads->tail = t;
1092 pthread_setspecific (perl_thr_key, (const void *)t);
1093 return t;
1094 } /* static c_ithread_t *c_ithread_create (PerlInterpreter *) */
1096 /*
1097 * Interface to collectd.
1098 */
1100 static int perl_init (void)
1101 {
1102 dTHX;
1104 if (NULL == perl_threads)
1105 return 0;
1107 if (NULL == aTHX) {
1108 c_ithread_t *t = NULL;
1110 pthread_mutex_lock (&perl_threads->mutex);
1111 t = c_ithread_create (perl_threads->head->interp);
1112 pthread_mutex_unlock (&perl_threads->mutex);
1114 aTHX = t->interp;
1115 }
1117 log_debug ("perl_init: c_ithread: interp = %p (active threads: %i)",
1118 aTHX, perl_threads->number_of_threads);
1119 return pplugin_call_all (aTHX_ PLUGIN_INIT);
1120 } /* static int perl_init (void) */
1122 static int perl_read (void)
1123 {
1124 dTHX;
1126 if (NULL == perl_threads)
1127 return 0;
1129 if (NULL == aTHX) {
1130 c_ithread_t *t = NULL;
1132 pthread_mutex_lock (&perl_threads->mutex);
1133 t = c_ithread_create (perl_threads->head->interp);
1134 pthread_mutex_unlock (&perl_threads->mutex);
1136 aTHX = t->interp;
1137 }
1139 log_debug ("perl_read: c_ithread: interp = %p (active threads: %i)",
1140 aTHX, perl_threads->number_of_threads);
1141 return pplugin_call_all (aTHX_ PLUGIN_READ);
1142 } /* static int perl_read (void) */
1144 static int perl_write (const data_set_t *ds, const value_list_t *vl)
1145 {
1146 dTHX;
1148 if (NULL == perl_threads)
1149 return 0;
1151 if (NULL == aTHX) {
1152 c_ithread_t *t = NULL;
1154 pthread_mutex_lock (&perl_threads->mutex);
1155 t = c_ithread_create (perl_threads->head->interp);
1156 pthread_mutex_unlock (&perl_threads->mutex);
1158 aTHX = t->interp;
1159 }
1161 log_debug ("perl_write: c_ithread: interp = %p (active threads: %i)",
1162 aTHX, perl_threads->number_of_threads);
1163 return pplugin_call_all (aTHX_ PLUGIN_WRITE, ds, vl);
1164 } /* static int perl_write (const data_set_t *, const value_list_t *) */
1166 static void perl_log (int level, const char *msg)
1167 {
1168 dTHX;
1170 if (NULL == perl_threads)
1171 return;
1173 if (NULL == aTHX) {
1174 c_ithread_t *t = NULL;
1176 pthread_mutex_lock (&perl_threads->mutex);
1177 t = c_ithread_create (perl_threads->head->interp);
1178 pthread_mutex_unlock (&perl_threads->mutex);
1180 aTHX = t->interp;
1181 }
1183 pplugin_call_all (aTHX_ PLUGIN_LOG, level, msg);
1184 return;
1185 } /* static void perl_log (int, const char *) */
1187 static int perl_notify (const notification_t *notif)
1188 {
1189 dTHX;
1191 if (NULL == perl_threads)
1192 return 0;
1194 if (NULL == aTHX) {
1195 c_ithread_t *t = NULL;
1197 pthread_mutex_lock (&perl_threads->mutex);
1198 t = c_ithread_create (perl_threads->head->interp);
1199 pthread_mutex_unlock (&perl_threads->mutex);
1201 aTHX = t->interp;
1202 }
1203 return pplugin_call_all (aTHX_ PLUGIN_NOTIF, notif);
1204 } /* static int perl_notify (const notification_t *) */
1206 static int perl_flush (const int timeout)
1207 {
1208 dTHX;
1210 if (NULL == perl_threads)
1211 return 0;
1213 if (NULL == aTHX) {
1214 c_ithread_t *t = NULL;
1216 pthread_mutex_lock (&perl_threads->mutex);
1217 t = c_ithread_create (perl_threads->head->interp);
1218 pthread_mutex_unlock (&perl_threads->mutex);
1220 aTHX = t->interp;
1221 }
1222 return pplugin_call_all (aTHX_ PLUGIN_FLUSH, timeout);
1223 } /* static int perl_flush (const int) */
1225 static int perl_shutdown (void)
1226 {
1227 c_ithread_t *t = NULL;
1229 int ret = 0;
1231 dTHX;
1233 plugin_unregister_complex_config ("perl");
1235 if (NULL == perl_threads)
1236 return 0;
1238 if (NULL == aTHX) {
1239 c_ithread_t *t = NULL;
1241 pthread_mutex_lock (&perl_threads->mutex);
1242 t = c_ithread_create (perl_threads->head->interp);
1243 pthread_mutex_unlock (&perl_threads->mutex);
1245 aTHX = t->interp;
1246 }
1248 log_debug ("perl_shutdown: c_ithread: interp = %p (active threads: %i)",
1249 aTHX, perl_threads->number_of_threads);
1251 plugin_unregister_log ("perl");
1252 plugin_unregister_notification ("perl");
1253 plugin_unregister_init ("perl");
1254 plugin_unregister_read ("perl");
1255 plugin_unregister_write ("perl");
1256 plugin_unregister_flush ("perl");
1258 ret = pplugin_call_all (aTHX_ PLUGIN_SHUTDOWN);
1260 pthread_mutex_lock (&perl_threads->mutex);
1261 t = perl_threads->tail;
1263 while (NULL != t) {
1264 c_ithread_t *thr = t;
1266 /* the pointer has to be advanced before destroying
1267 * the thread as this will free the memory */
1268 t = t->prev;
1270 c_ithread_destroy (thr);
1271 }
1273 pthread_mutex_unlock (&perl_threads->mutex);
1274 pthread_mutex_destroy (&perl_threads->mutex);
1276 sfree (perl_threads);
1278 pthread_key_delete (perl_thr_key);
1280 PERL_SYS_TERM ();
1282 plugin_unregister_shutdown ("perl");
1283 return ret;
1284 } /* static void perl_shutdown (void) */
1286 /*
1287 * Access functions for global variables.
1288 *
1289 * These functions implement the "magic" used to access
1290 * the global variables from Perl.
1291 */
1293 static int g_pv_get (pTHX_ SV *var, MAGIC *mg)
1294 {
1295 char *pv = mg->mg_ptr;
1296 sv_setpv (var, pv);
1297 return 0;
1298 } /* static int g_pv_get (pTHX_ SV *, MAGIC *) */
1300 static int g_pv_set (pTHX_ SV *var, MAGIC *mg)
1301 {
1302 char *pv = mg->mg_ptr;
1303 strncpy (pv, SvPV_nolen (var), DATA_MAX_NAME_LEN);
1304 pv[DATA_MAX_NAME_LEN - 1] = '\0';
1305 return 0;
1306 } /* static int g_pv_set (pTHX_ SV *, MAGIC *) */
1308 static int g_iv_get (pTHX_ SV *var, MAGIC *mg)
1309 {
1310 int *iv = (int *)mg->mg_ptr;
1311 sv_setiv (var, *iv);
1312 return 0;
1313 } /* static int g_iv_get (pTHX_ SV *, MAGIC *) */
1315 static int g_iv_set (pTHX_ SV *var, MAGIC *mg)
1316 {
1317 int *iv = (int *)mg->mg_ptr;
1318 *iv = (int)SvIV (var);
1319 return 0;
1320 } /* static int g_iv_set (pTHX_ SV *, MAGIC *) */
1322 static MGVTBL g_pv_vtbl = { g_pv_get, g_pv_set, NULL, NULL, NULL, NULL, NULL };
1323 static MGVTBL g_iv_vtbl = { g_iv_get, g_iv_set, NULL, NULL, NULL, NULL, NULL };
1325 /* bootstrap the Collectd module */
1326 static void xs_init (pTHX)
1327 {
1328 HV *stash = NULL;
1329 SV *tmp = NULL;
1330 char *file = __FILE__;
1332 int i = 0;
1334 dXSUB_SYS;
1336 /* enable usage of Perl modules using shared libraries */
1337 newXS ("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
1339 /* register API */
1340 for (i = 0; NULL != api[i].f; ++i)
1341 newXS (api[i].name, api[i].f, file);
1343 stash = gv_stashpv ("Collectd", 1);
1345 /* export "constants" */
1346 for (i = 0; '\0' != constants[i].name[0]; ++i)
1347 newCONSTSUB (stash, constants[i].name, newSViv (constants[i].value));
1349 /* export global variables
1350 * by adding "magic" to the SV's representing the globale variables
1351 * perl is able to automagically call the get/set function when
1352 * accessing any such variable (this is basically the same as using
1353 * tie() in Perl) */
1354 /* global strings */
1355 for (i = 0; '\0' != g_strings[i].name[0]; ++i) {
1356 tmp = get_sv (g_strings[i].name, 1);
1357 sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_pv_vtbl,
1358 g_strings[i].var, 0);
1359 }
1361 /* global integers */
1362 for (i = 0; '\0' != g_integers[i].name[0]; ++i) {
1363 tmp = get_sv (g_integers[i].name, 1);
1364 sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_iv_vtbl,
1365 (char *)g_integers[i].var, 0);
1366 }
1367 return;
1368 } /* static void xs_init (pTHX) */
1370 /* Initialize the global Perl interpreter. */
1371 static int init_pi (int argc, char **argv)
1372 {
1373 dTHXa (NULL);
1375 if (NULL != perl_threads)
1376 return 0;
1378 log_info ("Initializing Perl interpreter...");
1379 #if COLLECT_DEBUG
1380 {
1381 int i = 0;
1383 for (i = 0; i < argc; ++i)
1384 log_debug ("argv[%i] = \"%s\"", i, argv[i]);
1385 }
1386 #endif /* COLLECT_DEBUG */
1388 if (0 != pthread_key_create (&perl_thr_key, c_ithread_destructor)) {
1389 log_err ("init_pi: pthread_key_create failed");
1391 /* this must not happen - cowardly giving up if it does */
1392 exit (1);
1393 }
1395 PERL_SYS_INIT3 (&argc, &argv, &environ);
1397 perl_threads = (c_ithread_list_t *)smalloc (sizeof (c_ithread_list_t));
1398 memset (perl_threads, 0, sizeof (c_ithread_list_t));
1400 pthread_mutex_init (&perl_threads->mutex, NULL);
1401 /* locking the mutex should not be necessary at this point
1402 * but let's just do it for the sake of completeness */
1403 pthread_mutex_lock (&perl_threads->mutex);
1405 perl_threads->head = c_ithread_create (NULL);
1406 perl_threads->tail = perl_threads->head;
1408 if (NULL == (perl_threads->head->interp = perl_alloc ())) {
1409 log_err ("init_pi: Not enough memory.");
1410 exit (3);
1411 }
1413 aTHX = perl_threads->head->interp;
1414 pthread_mutex_unlock (&perl_threads->mutex);
1416 perl_construct (aTHX);
1418 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
1420 if (0 != perl_parse (aTHX_ xs_init, argc, argv, NULL)) {
1421 log_err ("init_pi: Unable to bootstrap Collectd.");
1422 exit (1);
1423 }
1425 /* Set $0 to "collectd" because perl_parse() has to set it to "-e". */
1426 sv_setpv (get_sv ("0", 0), "collectd");
1428 perl_run (aTHX);
1430 plugin_register_log ("perl", perl_log);
1431 plugin_register_notification ("perl", perl_notify);
1432 plugin_register_init ("perl", perl_init);
1434 plugin_register_read ("perl", perl_read);
1436 plugin_register_write ("perl", perl_write);
1437 plugin_register_flush ("perl", perl_flush);
1438 plugin_register_shutdown ("perl", perl_shutdown);
1439 return 0;
1440 } /* static int init_pi (const char **, const int) */
1442 /*
1443 * LoadPlugin "<Plugin>"
1444 */
1445 static int perl_config_loadplugin (pTHX_ oconfig_item_t *ci)
1446 {
1447 char module_name[DATA_MAX_NAME_LEN];
1449 char *value = NULL;
1451 if ((0 != ci->children_num) || (1 != ci->values_num)
1452 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1453 log_err ("LoadPlugin expects a single string argument.");
1454 return 1;
1455 }
1457 value = ci->values[0].value.string;
1459 if (NULL == get_module_name (module_name, sizeof (module_name), value)) {
1460 log_err ("Invalid module name %s", value);
1461 return (1);
1462 }
1464 init_pi (perl_argc, perl_argv);
1465 assert (NULL != perl_threads);
1466 assert (NULL != perl_threads->head);
1468 aTHX = perl_threads->head->interp;
1470 log_debug ("perl_config: loading perl plugin \"%s\"", value);
1471 load_module (PERL_LOADMOD_NOIMPORT,
1472 newSVpv (module_name, strlen (module_name)), Nullsv);
1473 return 0;
1474 } /* static int perl_config_loadplugin (oconfig_item_it *) */
1476 /*
1477 * BaseName "<Name>"
1478 */
1479 static int perl_config_basename (pTHX_ oconfig_item_t *ci)
1480 {
1481 char *value = NULL;
1483 if ((0 != ci->children_num) || (1 != ci->values_num)
1484 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1485 log_err ("BaseName expects a single string argument.");
1486 return 1;
1487 }
1489 value = ci->values[0].value.string;
1491 log_debug ("perl_config: Setting plugin basename to \"%s\"", value);
1492 strncpy (base_name, value, sizeof (base_name));
1493 base_name[sizeof (base_name) - 1] = '\0';
1494 return 0;
1495 } /* static int perl_config_basename (oconfig_item_it *) */
1497 /*
1498 * EnableDebugger "<Package>"|""
1499 */
1500 static int perl_config_enabledebugger (pTHX_ oconfig_item_t *ci)
1501 {
1502 char *value = NULL;
1504 if ((0 != ci->children_num) || (1 != ci->values_num)
1505 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1506 log_err ("EnableDebugger expects a single string argument.");
1507 return 1;
1508 }
1510 if (NULL != perl_threads) {
1511 log_warn ("EnableDebugger has no effects if used after LoadPlugin.");
1512 return 1;
1513 }
1515 value = ci->values[0].value.string;
1517 perl_argv = (char **)realloc (perl_argv,
1518 (++perl_argc + 1) * sizeof (char *));
1520 if (NULL == perl_argv) {
1521 log_err ("perl_config: Not enough memory.");
1522 exit (3);
1523 }
1525 if ('\0' == value[0]) {
1526 perl_argv[perl_argc - 1] = "-d";
1527 }
1528 else {
1529 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 4);
1530 sstrncpy (perl_argv[perl_argc - 1], "-d:", 4);
1531 sstrncpy (perl_argv[perl_argc - 1] + 3, value, strlen (value) + 1);
1532 }
1534 perl_argv[perl_argc] = NULL;
1535 return 0;
1536 } /* static int perl_config_enabledebugger (oconfig_item_it *) */
1538 /*
1539 * IncludeDir "<Dir>"
1540 */
1541 static int perl_config_includedir (pTHX_ oconfig_item_t *ci)
1542 {
1543 char *value = NULL;
1545 if ((0 != ci->children_num) || (1 != ci->values_num)
1546 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1547 log_err ("IncludeDir expects a single string argument.");
1548 return 1;
1549 }
1551 value = ci->values[0].value.string;
1553 if (NULL == aTHX) {
1554 perl_argv = (char **)realloc (perl_argv,
1555 (++perl_argc + 1) * sizeof (char *));
1557 if (NULL == perl_argv) {
1558 log_err ("perl_config: Not enough memory.");
1559 exit (3);
1560 }
1562 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 3);
1563 sstrncpy(perl_argv[perl_argc - 1], "-I", 3);
1564 sstrncpy(perl_argv[perl_argc - 1] + 2, value, strlen (value) + 1);
1566 perl_argv[perl_argc] = NULL;
1567 }
1568 else {
1569 /* prepend the directory to @INC */
1570 av_unshift (GvAVn (PL_incgv), 1);
1571 av_store (GvAVn (PL_incgv), 0, newSVpv (value, strlen (value)));
1572 }
1573 return 0;
1574 } /* static int perl_config_includedir (oconfig_item_it *) */
1576 static int perl_config (oconfig_item_t *ci)
1577 {
1578 int i = 0;
1580 dTHX;
1582 /* dTHX does not get any valid values in case Perl
1583 * has not been initialized */
1584 if (NULL == perl_threads)
1585 aTHX = NULL;
1587 for (i = 0; i < ci->children_num; ++i) {
1588 oconfig_item_t *c = ci->children + i;
1590 if (0 == strcasecmp (c->key, "LoadPlugin"))
1591 perl_config_loadplugin (aTHX_ c);
1592 else if (0 == strcasecmp (c->key, "BaseName"))
1593 perl_config_basename (aTHX_ c);
1594 else if (0 == strcasecmp (c->key, "EnableDebugger"))
1595 perl_config_enabledebugger (aTHX_ c);
1596 else if (0 == strcasecmp (c->key, "IncludeDir"))
1597 perl_config_includedir (aTHX_ c);
1598 else
1599 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1600 }
1601 return 0;
1602 } /* static int perl_config (oconfig_item_t *) */
1604 void module_register (void)
1605 {
1606 perl_argc = 4;
1607 perl_argv = (char **)smalloc ((perl_argc + 1) * sizeof (char *));
1609 /* default options for the Perl interpreter */
1610 perl_argv[0] = "";
1611 perl_argv[1] = "-MCollectd";
1612 perl_argv[2] = "-e";
1613 perl_argv[3] = "1";
1614 perl_argv[4] = NULL;
1616 plugin_register_complex_config ("perl", perl_config);
1617 return;
1618 } /* void module_register (void) */
1620 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */