1 /**
2 * collectd - src/perl.c
3 * Copyright (C) 2007 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 #include "collectd.h"
29 #include "configfile.h"
31 #include <EXTERN.h>
32 #include <perl.h>
34 #include <XSUB.h>
36 /* Some versions of Perl define their own version of DEBUG... :-/ */
37 #ifdef DEBUG
38 # undef DEBUG
39 #endif /* DEBUG */
41 /* ... while we want the definition found in plugin.h. */
42 #include "plugin.h"
43 #include "common.h"
45 #if !defined(USE_ITHREADS)
46 # error "Perl does not support ithreads!"
47 #endif /* !defined(USE_ITHREADS) */
49 #define PLUGIN_INIT 0
50 #define PLUGIN_READ 1
51 #define PLUGIN_WRITE 2
52 #define PLUGIN_SHUTDOWN 3
53 #define PLUGIN_LOG 4
55 #define PLUGIN_TYPES 5
57 #define PLUGIN_DATASET 255
59 #define log_debug(...) DEBUG ("perl: " __VA_ARGS__)
60 #define log_info(...) INFO ("perl: " __VA_ARGS__)
61 #define log_warn(...) WARNING ("perl: " __VA_ARGS__)
62 #define log_err(...) ERROR ("perl: " __VA_ARGS__)
64 /* this is defined in DynaLoader.a */
65 void boot_DynaLoader (PerlInterpreter *, CV *);
67 static XS (Collectd_plugin_register_ds);
68 static XS (Collectd_plugin_unregister_ds);
69 static XS (Collectd_plugin_dispatch_values);
70 static XS (Collectd_plugin_log);
72 /*
73 * private variables
74 */
76 static PerlInterpreter *perl = NULL;
78 static int perl_argc = 0;
79 static char **perl_argv = NULL;
81 static char base_name[DATA_MAX_NAME_LEN] = "";
83 static struct {
84 char name[64];
85 XS ((*f));
86 } api[] =
87 {
88 { "Collectd::plugin_register_data_set", Collectd_plugin_register_ds },
89 { "Collectd::plugin_unregister_data_set", Collectd_plugin_unregister_ds },
90 { "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
91 { "Collectd::plugin_log", Collectd_plugin_log },
92 { "", NULL }
93 };
95 struct {
96 char name[64];
97 int value;
98 } constants[] =
99 {
100 { "Collectd::TYPE_INIT", PLUGIN_INIT },
101 { "Collectd::TYPE_READ", PLUGIN_READ },
102 { "Collectd::TYPE_WRITE", PLUGIN_WRITE },
103 { "Collectd::TYPE_SHUTDOWN", PLUGIN_SHUTDOWN },
104 { "Collectd::TYPE_LOG", PLUGIN_LOG },
105 { "Collectd::TYPE_DATASET", PLUGIN_DATASET },
106 { "Collectd::DS_TYPE_COUNTER", DS_TYPE_COUNTER },
107 { "Collectd::DS_TYPE_GAUGE", DS_TYPE_GAUGE },
108 { "Collectd::LOG_ERR", LOG_ERR },
109 { "Collectd::LOG_WARNING", LOG_WARNING },
110 { "Collectd::LOG_NOTICE", LOG_NOTICE },
111 { "Collectd::LOG_INFO", LOG_INFO },
112 { "Collectd::LOG_DEBUG", LOG_DEBUG },
113 { "", 0 }
114 };
116 /*
117 * Helper functions for data type conversion.
118 */
120 /*
121 * data source:
122 * [
123 * {
124 * name => $ds_name,
125 * type => $ds_type,
126 * min => $ds_min,
127 * max => $ds_max
128 * },
129 * ...
130 * ]
131 */
132 static int hv2data_source (HV *hash, data_source_t *ds)
133 {
134 SV **tmp = NULL;
136 if ((NULL == hash) || (NULL == ds))
137 return -1;
139 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "name", 4, 0))) {
140 strncpy (ds->name, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
141 ds->name[DATA_MAX_NAME_LEN - 1] = '\0';
142 }
143 else {
144 log_err ("hv2data_source: No DS name given.");
145 return -1;
146 }
148 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "type", 4, 0))) {
149 ds->type = SvIV (*tmp);
151 if ((DS_TYPE_COUNTER != ds->type) && (DS_TYPE_GAUGE != ds->type)) {
152 log_err ("hv2data_source: Invalid DS type.");
153 return -1;
154 }
155 }
156 else {
157 ds->type = DS_TYPE_COUNTER;
158 }
160 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "min", 3, 0)))
161 ds->min = SvNV (*tmp);
162 else
163 ds->min = NAN;
165 if (NULL != (tmp = Perl_hv_fetch (perl, hash, "max", 3, 0)))
166 ds->max = SvNV (*tmp);
167 else
168 ds->max = NAN;
169 return 0;
170 } /* static data_source_t *hv2data_source (HV *) */
172 static int av2value (char *name, AV *array, value_t *value, int len)
173 {
174 const data_set_t *ds;
176 int i = 0;
178 if ((NULL == name) || (NULL == array) || (NULL == value))
179 return -1;
181 if (Perl_av_len (perl, array) < len - 1)
182 len = Perl_av_len (perl, array) + 1;
184 if (0 >= len)
185 return -1;
187 ds = plugin_get_ds (name);
188 if (NULL == ds) {
189 log_err ("av2value: Unknown dataset \"%s\"", name);
190 return -1;
191 }
193 if (ds->ds_num < len) {
194 log_warn ("av2value: Value length exceeds data set length.");
195 len = ds->ds_num;
196 }
198 for (i = 0; i < len; ++i) {
199 SV **tmp = Perl_av_fetch (perl, array, i, 0);
201 if (NULL != tmp) {
202 if (DS_TYPE_COUNTER == ds->ds[i].type)
203 value[i].counter = SvIV (*tmp);
204 else
205 value[i].gauge = SvNV (*tmp);
206 }
207 else {
208 return -1;
209 }
210 }
211 return len;
212 } /* static int av2value (char *, AV *, value_t *, int) */
214 static int data_set2av (data_set_t *ds, AV *array)
215 {
216 int i = 0;
218 if ((NULL == ds) || (NULL == array))
219 return -1;
221 Perl_av_extend (perl, array, ds->ds_num);
223 for (i = 0; i < ds->ds_num; ++i) {
224 HV *source = Perl_newHV (perl);
226 if (NULL == Perl_hv_store (perl, source, "name", 4,
227 Perl_newSVpv (perl, ds->ds[i].name, 0), 0))
228 return -1;
230 if (NULL == Perl_hv_store (perl, source, "type", 4,
231 Perl_newSViv (perl, ds->ds[i].type), 0))
232 return -1;
234 if (! isnan (ds->ds[i].min))
235 if (NULL == Perl_hv_store (perl, source, "min", 3,
236 Perl_newSVnv (perl, ds->ds[i].min), 0))
237 return -1;
239 if (! isnan (ds->ds[i].max))
240 if (NULL == Perl_hv_store (perl, source, "max", 3,
241 Perl_newSVnv (perl, ds->ds[i].max), 0))
242 return -1;
244 if (NULL == Perl_av_store (perl, array, i,
245 Perl_newRV_noinc (perl, (SV *)source)))
246 return -1;
247 }
248 return 0;
249 } /* static int data_set2av (data_set_t *, AV *) */
251 static int value_list2hv (value_list_t *vl, data_set_t *ds, HV *hash)
252 {
253 AV *values = NULL;
255 int i = 0;
256 int len = 0;
258 if ((NULL == vl) || (NULL == ds) || (NULL == hash))
259 return -1;
261 len = vl->values_len;
263 if (ds->ds_num < len) {
264 log_warn ("value2av: Value length exceeds data set length.");
265 len = ds->ds_num;
266 }
268 values = Perl_newAV (perl);
269 Perl_av_extend (perl, values, len - 1);
271 for (i = 0; i < len; ++i) {
272 SV *val = NULL;
274 if (DS_TYPE_COUNTER == ds->ds[i].type)
275 val = Perl_newSViv (perl, vl->values[i].counter);
276 else
277 val = Perl_newSVnv (perl, vl->values[i].gauge);
279 if (NULL == Perl_av_store (perl, values, i, val)) {
280 Perl_av_undef (perl, values);
281 return -1;
282 }
283 }
285 if (NULL == Perl_hv_store (perl, hash, "values", 6,
286 Perl_newRV_noinc (perl, (SV *)values), 0))
287 return -1;
289 if (0 != vl->time)
290 if (NULL == Perl_hv_store (perl, hash, "time", 4,
291 Perl_newSViv (perl, vl->time), 0))
292 return -1;
294 if ('\0' != vl->host[0])
295 if (NULL == Perl_hv_store (perl, hash, "host", 4,
296 Perl_newSVpv (perl, vl->host, 0), 0))
297 return -1;
299 if ('\0' != vl->plugin[0])
300 if (NULL == Perl_hv_store (perl, hash, "plugin", 6,
301 Perl_newSVpv (perl, vl->plugin, 0), 0))
302 return -1;
304 if ('\0' != vl->plugin_instance[0])
305 if (NULL == Perl_hv_store (perl, hash, "plugin_instance", 15,
306 Perl_newSVpv (perl, vl->plugin_instance, 0), 0))
307 return -1;
309 if ('\0' != vl->type_instance[0])
310 if (NULL == Perl_hv_store (perl, hash, "type_instance", 13,
311 Perl_newSVpv (perl, vl->type_instance, 0), 0))
312 return -1;
313 return 0;
314 } /* static int value2av (value_list_t *, data_set_t *, HV *) */
316 /*
317 * Internal functions.
318 */
320 static char *get_module_name (char *buf, size_t buf_len, const char *module) {
321 int status = 0;
322 if (base_name[0] == '\0')
323 status = snprintf (buf, buf_len, "%s", module);
324 else
325 status = snprintf (buf, buf_len, "%s::%s", base_name, module);
326 if ((status < 0) || (status >= buf_len))
327 return (NULL);
328 buf[buf_len - 1] = '\0';
329 return (buf);
330 } /* char *get_module_name */
332 /*
333 * Add a plugin's data set definition.
334 */
335 static int pplugin_register_data_set (char *name, AV *dataset)
336 {
337 int len = -1;
338 int i = 0;
340 data_source_t *ds = NULL;
341 data_set_t *set = NULL;
343 if ((NULL == name) || (NULL == dataset))
344 return -1;
346 len = Perl_av_len (perl, dataset);
348 if (-1 == len)
349 return -1;
351 ds = (data_source_t *)smalloc ((len + 1) * sizeof (data_source_t));
352 set = (data_set_t *)smalloc (sizeof (data_set_t));
354 for (i = 0; i <= len; ++i) {
355 SV **elem = Perl_av_fetch (perl, dataset, i, 0);
357 if (NULL == elem)
358 return -1;
360 if (! (SvROK (*elem) && (SVt_PVHV == SvTYPE (SvRV (*elem))))) {
361 log_err ("pplugin_register_data_set: Invalid data source.");
362 return -1;
363 }
365 if (-1 == hv2data_source ((HV *)SvRV (*elem), &ds[i]))
366 return -1;
368 log_debug ("pplugin_register_data_set: "
369 "DS.name = \"%s\", DS.type = %i, DS.min = %f, DS.max = %f",
370 ds[i].name, ds[i].type, ds[i].min, ds[i].max);
371 }
373 strncpy (set->type, name, DATA_MAX_NAME_LEN);
374 set->type[DATA_MAX_NAME_LEN - 1] = '\0';
376 set->ds_num = len + 1;
377 set->ds = ds;
378 return plugin_register_data_set (set);
379 } /* static int pplugin_register_data_set (char *, SV *) */
381 /*
382 * Remove a plugin's data set definition.
383 */
384 static int pplugin_unregister_data_set (char *name)
385 {
386 if (NULL == name)
387 return 0;
388 return plugin_unregister_data_set (name);
389 } /* static int pplugin_unregister_data_set (char *) */
391 /*
392 * Submit the values to the write functions.
393 *
394 * value list:
395 * {
396 * values => [ @values ],
397 * time => $time,
398 * host => $host,
399 * plugin => $plugin,
400 * plugin_instance => $pinstance,
401 * type_instance => $tinstance,
402 * }
403 */
404 static int pplugin_dispatch_values (char *name, HV *values)
405 {
406 value_list_t list = VALUE_LIST_INIT;
407 value_t *val = NULL;
409 SV **tmp = NULL;
411 int ret = 0;
413 if ((NULL == name) || (NULL == values))
414 return -1;
416 if ((NULL == (tmp = Perl_hv_fetch (perl, values, "values", 6, 0)))
417 || (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
418 log_err ("pplugin_dispatch_values: No valid values given.");
419 return -1;
420 }
422 {
423 AV *array = (AV *)SvRV (*tmp);
424 int len = Perl_av_len (perl, array) + 1;
426 if (len <= 0)
427 return -1;
429 val = (value_t *)smalloc (len * sizeof (value_t));
431 list.values_len = av2value (name, (AV *)SvRV (*tmp), val, len);
432 list.values = val;
434 if (-1 == list.values_len) {
435 sfree (val);
436 return -1;
437 }
438 }
440 if (NULL != (tmp = Perl_hv_fetch (perl, values, "time", 4, 0))) {
441 list.time = (time_t)SvIV (*tmp);
442 }
443 else {
444 list.time = time (NULL);
445 }
447 if (NULL != (tmp = Perl_hv_fetch (perl, values, "host", 4, 0))) {
448 strncpy (list.host, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
449 list.host[DATA_MAX_NAME_LEN - 1] = '\0';
450 }
451 else {
452 strcpy (list.host, hostname_g);
453 }
455 if (NULL != (tmp = Perl_hv_fetch (perl, values, "plugin", 6, 0))) {
456 strncpy (list.plugin, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
457 list.plugin[DATA_MAX_NAME_LEN - 1] = '\0';
458 }
460 if (NULL != (tmp = Perl_hv_fetch (perl, values,
461 "plugin_instance", 15, 0))) {
462 strncpy (list.plugin_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
463 list.plugin_instance[DATA_MAX_NAME_LEN - 1] = '\0';
464 }
466 if (NULL != (tmp = Perl_hv_fetch (perl, values, "type_instance", 13, 0))) {
467 strncpy (list.type_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
468 list.type_instance[DATA_MAX_NAME_LEN - 1] = '\0';
469 }
471 ret = plugin_dispatch_values (name, &list);
473 sfree (val);
474 return ret;
475 } /* static int pplugin_dispatch_values (char *, HV *) */
477 /*
478 * Call all working functions of the given type.
479 */
480 static int pplugin_call_all (int type, ...)
481 {
482 int retvals = 0;
484 va_list ap;
485 int ret = 0;
487 dSP;
489 if ((type < 0) || (type >= PLUGIN_TYPES))
490 return -1;
492 va_start (ap, type);
494 ENTER;
495 SAVETMPS;
497 PUSHMARK (SP);
499 XPUSHs (sv_2mortal (Perl_newSViv (perl, (IV)type)));
501 if (PLUGIN_WRITE == type) {
502 /*
503 * $_[0] = $plugin_type;
504 *
505 * $_[1] =
506 * [
507 * {
508 * name => $ds_name,
509 * type => $ds_type,
510 * min => $ds_min,
511 * max => $ds_max
512 * },
513 * ...
514 * ];
515 *
516 * $_[2] =
517 * {
518 * values => [ $v1, ... ],
519 * time => $time,
520 * host => $hostname,
521 * plugin => $plugin,
522 * plugin_instance => $instance,
523 * type_instance => $type_instance
524 * };
525 */
526 data_set_t *ds;
527 value_list_t *vl;
529 AV *pds = Perl_newAV (perl);
530 HV *pvl = Perl_newHV (perl);
532 ds = va_arg (ap, data_set_t *);
533 vl = va_arg (ap, value_list_t *);
535 if (-1 == data_set2av (ds, pds))
536 return -1;
538 if (-1 == value_list2hv (vl, ds, pvl))
539 return -1;
541 XPUSHs (sv_2mortal (Perl_newSVpv (perl, ds->type, 0)));
542 XPUSHs (sv_2mortal (Perl_newRV_noinc (perl, (SV *)pds)));
543 XPUSHs (sv_2mortal (Perl_newRV_noinc (perl, (SV *)pvl)));
544 }
545 else if (PLUGIN_LOG == type) {
546 /*
547 * $_[0] = $level;
548 *
549 * $_[1] = $message;
550 */
551 XPUSHs (sv_2mortal (Perl_newSViv (perl, va_arg (ap, int))));
552 XPUSHs (sv_2mortal (Perl_newSVpv (perl, va_arg (ap, char *), 0)));
553 }
555 PUTBACK;
557 retvals = Perl_call_pv (perl, "Collectd::plugin_call_all", G_SCALAR);
559 SPAGAIN;
560 if (0 < retvals) {
561 SV *tmp = POPs;
562 if (! SvTRUE (tmp))
563 ret = -1;
564 }
566 PUTBACK;
567 FREETMPS;
568 LEAVE;
570 va_end (ap);
571 return ret;
572 } /* static int pplugin_call_all (int, ...) */
574 /*
575 * Exported Perl API.
576 */
578 /*
579 * Collectd::plugin_register_data_set (type, dataset).
580 *
581 * type:
582 * type of the dataset
583 *
584 * dataset:
585 * dataset to be registered
586 */
587 static XS (Collectd_plugin_register_ds)
588 {
589 SV *data = NULL;
590 int ret = 0;
592 dXSARGS;
594 if (2 != items) {
595 log_err ("Usage: Collectd::plugin_register_data_set(type, dataset)");
596 XSRETURN_EMPTY;
597 }
599 log_debug ("Collectd::plugin_register_data_set: "
600 "type = \"%s\", dataset = \"%s\"",
601 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
603 data = ST (1);
605 if (SvROK (data) && (SVt_PVAV == SvTYPE (SvRV (data)))) {
606 ret = pplugin_register_data_set (SvPV_nolen (ST (0)),
607 (AV *)SvRV (data));
608 }
609 else {
610 log_err ("Collectd::plugin_register_data_set: Invalid data.");
611 XSRETURN_EMPTY;
612 }
614 if (0 == ret)
615 XSRETURN_YES;
616 else
617 XSRETURN_EMPTY;
618 } /* static XS (Collectd_plugin_register_ds) */
620 /*
621 * Collectd::plugin_unregister_data_set (type).
622 *
623 * type:
624 * type of the dataset
625 */
626 static XS (Collectd_plugin_unregister_ds)
627 {
628 dXSARGS;
630 if (1 != items) {
631 log_err ("Usage: Collectd::plugin_unregister_data_set(type)");
632 XSRETURN_EMPTY;
633 }
635 log_debug ("Collectd::plugin_unregister_data_set: type = \"%s\"",
636 SvPV_nolen (ST (0)));
638 if (0 == pplugin_unregister_data_set (SvPV_nolen (ST (1))))
639 XSRETURN_YES;
640 else
641 XSRETURN_EMPTY;
642 } /* static XS (Collectd_plugin_register_ds) */
644 /*
645 * Collectd::plugin_dispatch_values (name, values).
646 *
647 * name:
648 * name of the plugin
649 *
650 * values:
651 * value list to submit
652 */
653 static XS (Collectd_plugin_dispatch_values)
654 {
655 SV *values = NULL;
657 int ret = 0;
659 dXSARGS;
661 if (2 != items) {
662 log_err ("Usage: Collectd::plugin_dispatch_values(name, values)");
663 XSRETURN_EMPTY;
664 }
666 log_debug ("Collectd::plugin_dispatch_values: "
667 "name = \"%s\", values=\"%s\"",
668 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
670 values = ST (1);
672 if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
673 log_err ("Collectd::plugin_dispatch_values: Invalid values.");
674 XSRETURN_EMPTY;
675 }
677 if ((NULL == ST (0)) || (NULL == values))
678 XSRETURN_EMPTY;
680 ret = pplugin_dispatch_values (SvPV_nolen (ST (0)), (HV *)SvRV (values));
682 if (0 == ret)
683 XSRETURN_YES;
684 else
685 XSRETURN_EMPTY;
686 } /* static XS (Collectd_plugin_dispatch_values) */
688 /*
689 * Collectd::plugin_log (level, message).
690 *
691 * level:
692 * log level (LOG_DEBUG, ... LOG_ERR)
693 *
694 * message:
695 * log message
696 */
697 static XS (Collectd_plugin_log)
698 {
699 dXSARGS;
701 if (2 != items) {
702 log_err ("Usage: Collectd::plugin_log(level, message)");
703 XSRETURN_EMPTY;
704 }
706 plugin_log (SvIV (ST (0)), SvPV_nolen (ST (1)));
707 XSRETURN_YES;
708 } /* static XS (Collectd_plugin_log) */
710 /*
711 * Interface to collectd.
712 */
714 static int perl_init (void)
715 {
716 if (NULL == perl)
717 return 0;
719 PERL_SET_CONTEXT (perl);
720 return pplugin_call_all (PLUGIN_INIT);
721 } /* static int perl_init (void) */
723 static int perl_read (void)
724 {
725 if (NULL == perl)
726 return 0;
728 PERL_SET_CONTEXT (perl);
729 return pplugin_call_all (PLUGIN_READ);
730 } /* static int perl_read (void) */
732 static int perl_write (const data_set_t *ds, const value_list_t *vl)
733 {
734 if (NULL == perl)
735 return 0;
737 PERL_SET_CONTEXT (perl);
738 return pplugin_call_all (PLUGIN_WRITE, ds, vl);
739 } /* static int perl_write (const data_set_t *, const value_list_t *) */
741 static void perl_log (int level, const char *msg)
742 {
743 if (NULL == perl)
744 return;
746 PERL_SET_CONTEXT (perl);
747 pplugin_call_all (PLUGIN_LOG, level, msg);
748 return;
749 } /* static void perl_log (int, const char *) */
751 static int perl_shutdown (void)
752 {
753 int ret = 0;
755 plugin_unregister_complex_config ("perl");
757 if (NULL == perl)
758 return 0;
760 plugin_unregister_log ("perl");
761 plugin_unregister_init ("perl");
762 plugin_unregister_read ("perl");
763 plugin_unregister_write ("perl");
765 PERL_SET_CONTEXT (perl);
766 ret = pplugin_call_all (PLUGIN_SHUTDOWN);
768 #if COLLECT_DEBUG
769 Perl_sv_report_used (perl);
770 #endif /* COLLECT_DEBUG */
772 perl_destruct (perl);
773 perl_free (perl);
774 perl = NULL;
776 PERL_SYS_TERM ();
778 plugin_unregister_shutdown ("perl");
779 return ret;
780 } /* static void perl_shutdown (void) */
782 /* bootstrap the Collectd module */
783 static void xs_init (pTHX)
784 {
785 HV *stash = NULL;
786 char *file = __FILE__;
788 int i = 0;
790 dXSUB_SYS;
792 /* enable usage of Perl modules using shared libraries */
793 Perl_newXS (perl, "DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
795 /* register API */
796 for (i = 0; NULL != api[i].f; ++i)
797 Perl_newXS (perl, api[i].name, api[i].f, file);
799 stash = Perl_gv_stashpv (perl, "Collectd", 1);
801 /* export "constants" */
802 for (i = 0; '\0' != constants[i].name[0]; ++i)
803 Perl_newCONSTSUB (perl, stash, constants[i].name,
804 Perl_newSViv (perl, constants[i].value));
805 return;
806 } /* static void xs_init (pTHX) */
808 /* Initialize the global Perl interpreter. */
809 static int init_pi (int argc, char **argv)
810 {
811 if (NULL != perl)
812 return 0;
814 log_info ("Initializing Perl interpreter...");
815 #if COLLECT_DEBUG
816 {
817 int i = 0;
819 for (i = 0; i < argc; ++i)
820 log_debug ("argv[%i] = \"%s\"", i, argv[i]);
821 }
822 #endif /* COLLECT_DEBUG */
824 PERL_SYS_INIT3 (&argc, &argv, &environ);
826 if (NULL == (perl = perl_alloc ())) {
827 log_err ("module_register: Not enough memory.");
828 exit (3);
829 }
830 perl_construct (perl);
832 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
834 if (0 != perl_parse (perl, xs_init, argc, argv, NULL)) {
835 log_err ("module_register: Unable to bootstrap Collectd.");
836 exit (1);
837 }
839 /* Set $0 to "collectd" because perl_parse() has to set it to "-e". */
840 Perl_sv_setpv (perl, Perl_get_sv (perl, "0", 0), "collectd");
842 perl_run (perl);
844 plugin_register_log ("perl", perl_log);
845 plugin_register_init ("perl", perl_init);
847 plugin_register_read ("perl", perl_read);
849 plugin_register_write ("perl", perl_write);
850 plugin_register_shutdown ("perl", perl_shutdown);
851 return 0;
852 } /* static int init_pi (const char **, const int) */
854 /*
855 * LoadPlugin "<Plugin>"
856 */
857 static int perl_config_loadplugin (oconfig_item_t *ci)
858 {
859 char module_name[DATA_MAX_NAME_LEN];
861 char *value = NULL;
863 if ((0 != ci->children_num) || (1 != ci->values_num)
864 || (OCONFIG_TYPE_STRING != ci->values[0].type))
865 return 1;
867 value = ci->values[0].value.string;
869 if (NULL == get_module_name (module_name, sizeof (module_name), value)) {
870 log_err ("Invalid module name %s", value);
871 return (1);
872 }
874 init_pi (perl_argc, perl_argv);
876 log_debug ("perl_config: loading perl plugin \"%s\"", value);
877 Perl_load_module (perl, PERL_LOADMOD_NOIMPORT,
878 Perl_newSVpv (perl, module_name, strlen (module_name)),
879 Nullsv);
880 return 0;
881 } /* static int perl_config_loadplugin (oconfig_item_it *) */
883 /*
884 * BaseName "<Name>"
885 */
886 static int perl_config_basename (oconfig_item_t *ci)
887 {
888 char *value = NULL;
890 if ((0 != ci->children_num) || (1 != ci->values_num)
891 || (OCONFIG_TYPE_STRING != ci->values[0].type))
892 return 1;
894 value = ci->values[0].value.string;
896 log_debug ("perl_config: Setting plugin basename to \"%s\"", value);
897 strncpy (base_name, value, sizeof (base_name));
898 base_name[sizeof (base_name) - 1] = '\0';
899 return 0;
900 } /* static int perl_config_basename (oconfig_item_it *) */
902 /*
903 * EnableDebugger "<Package>"|""
904 */
905 static int perl_config_enabledebugger (oconfig_item_t *ci)
906 {
907 char *value = NULL;
909 if ((0 != ci->children_num) || (1 != ci->values_num)
910 || (OCONFIG_TYPE_STRING != ci->values[0].type))
911 return 1;
913 value = ci->values[0].value.string;
915 perl_argv = (char **)realloc (perl_argv,
916 (++perl_argc + 1) * sizeof (char *));
918 if (NULL == perl_argv) {
919 log_err ("perl_config: Not enough memory.");
920 exit (3);
921 }
923 if ('\0' == value[0]) {
924 perl_argv[perl_argc - 1] = "-d";
925 }
926 else {
927 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 4);
928 sstrncpy (perl_argv[perl_argc - 1], "-d:", 4);
929 sstrncpy (perl_argv[perl_argc - 1] + 3, value, strlen (value) + 1);
930 }
932 perl_argv[perl_argc] = NULL;
933 return 0;
934 } /* static int perl_config_enabledebugger (oconfig_item_it *) */
936 /*
937 * IncludeDir "<Dir>"
938 */
939 static int perl_config_includedir (oconfig_item_t *ci)
940 {
941 char *value = NULL;
943 if ((0 != ci->children_num) || (1 != ci->values_num)
944 || (OCONFIG_TYPE_STRING != ci->values[0].type))
945 return 1;
947 value = ci->values[0].value.string;
949 if (NULL == perl) {
950 perl_argv = (char **)realloc (perl_argv,
951 (++perl_argc + 1) * sizeof (char *));
953 if (NULL == perl_argv) {
954 log_err ("perl_config: Not enough memory.");
955 exit (3);
956 }
958 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 3);
959 sstrncpy(perl_argv[perl_argc - 1], "-I", 3);
960 sstrncpy(perl_argv[perl_argc - 1] + 2, value, strlen (value) + 1);
962 perl_argv[perl_argc] = NULL;
963 }
964 else {
965 /* prepend the directory to @INC */
966 Perl_av_unshift (perl, GvAVn (PL_incgv), 1);
967 Perl_av_store (perl, GvAVn (PL_incgv),
968 0, Perl_newSVpv (perl, value, strlen (value)));
969 }
970 return 0;
971 } /* static int perl_config_includedir (oconfig_item_it *) */
973 static int perl_config (oconfig_item_t *ci)
974 {
975 int i = 0;
977 for (i = 0; i < ci->children_num; ++i) {
978 oconfig_item_t *c = ci->children + i;
980 if (0 == strcasecmp (c->key, "LoadPlugin"))
981 perl_config_loadplugin (c);
982 else if (0 == strcasecmp (c->key, "BaseName"))
983 perl_config_basename (c);
984 else if (0 == strcasecmp (c->key, "EnableDebugger"))
985 perl_config_enabledebugger (c);
986 else if (0 == strcasecmp (c->key, "IncludeDir"))
987 perl_config_includedir (c);
988 else
989 log_warn ("Ignoring unknown config key \"%s\".", c->key);
990 }
991 return 0;
992 } /* static int perl_config (oconfig_item_t *) */
994 void module_register (void)
995 {
996 perl_argc = 4;
997 perl_argv = (char **)smalloc ((perl_argc + 1) * sizeof (char *));
999 /* default options for the Perl interpreter */
1000 perl_argv[0] = "";
1001 perl_argv[1] = "-MCollectd";
1002 perl_argv[2] = "-e";
1003 perl_argv[3] = "1";
1004 perl_argv[4] = NULL;
1006 plugin_register_complex_config ("perl", perl_config);
1007 return;
1008 } /* void module_register (void) */
1010 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */