--- /dev/null
+/**
+ * collectd - src/perl.c
+ * Copyright (C) 2007 Sebastian Harl
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Author:
+ * Sebastian Harl <sh at tokkee.org>
+ **/
+
+/*
+ * This plugin embeds a Perl interpreter into collectd and provides an
+ * interface for collectd plugins written in perl.
+ */
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#include "configfile.h"
+
+#include <EXTERN.h>
+#include <perl.h>
+
+#include <XSUB.h>
+
+#define PLUGIN_INIT 0
+#define PLUGIN_READ 1
+#define PLUGIN_WRITE 2
+#define PLUGIN_SHUTDOWN 3
+#define PLUGIN_LOG 4
+
+#define PLUGIN_TYPES 5
+
+#define PLUGIN_DATASET 255
+
+#define log_debug(...) DEBUG ("perl: " __VA_ARGS__)
+#define log_warn(...) WARNING ("perl: " __VA_ARGS__)
+#define log_err(...) ERROR ("perl: " __VA_ARGS__)
+
+
+/* this is defined in DynaLoader.a */
+void boot_DynaLoader (PerlInterpreter *, CV *);
+
+static XS (Collectd_plugin_register);
+static XS (Collectd_plugin_unregister);
+static XS (Collectd_plugin_dispatch_values);
+
+
+/*
+ * private data types
+ */
+
+typedef struct {
+ int len;
+ int *values;
+} ds_types_t;
+
+typedef struct {
+ int wait_time;
+ int wait_left;
+
+ SV *sub;
+} pplugin_t;
+
+
+/*
+ * private variables
+ */
+
+/* valid configuration file keys */
+static const char *config_keys[] =
+{
+ "LoadPlugin",
+ NULL
+};
+static int config_keys_num = 1;
+
+static PerlInterpreter *perl = NULL;
+
+static char *plugin_types[] = { "init", "read", "write", "shutdown" };
+static HV *plugins[PLUGIN_TYPES];
+static HV *data_sets;
+
+static struct {
+ char name[64];
+ XS ((*f));
+} api[] =
+{
+ { "Collectd::plugin_register", Collectd_plugin_register },
+ { "Collectd::plugin_unregister", Collectd_plugin_unregister },
+ { "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
+ { "", NULL }
+};
+
+
+/*
+ * Helper functions for data type conversion.
+ */
+
+/*
+ * data source:
+ * [
+ * {
+ * name => $ds_name,
+ * type => $ds_type,
+ * min => $ds_min,
+ * max => $ds_max
+ * },
+ * ...
+ * ]
+ */
+static int hv2data_source (HV *hash, data_source_t *ds)
+{
+ SV **tmp = NULL;
+
+ if ((NULL == hash) || (NULL == ds))
+ return -1;
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, hash, "name", 4, 0))) {
+ strncpy (ds->name, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
+ ds->name[DATA_MAX_NAME_LEN - 1] = '\0';
+ }
+ else {
+ log_err ("hv2data_source: No DS name given.");
+ return -1;
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, hash, "type", 4, 0))) {
+ ds->type = SvIV (*tmp);
+
+ if ((DS_TYPE_COUNTER != ds->type) && (DS_TYPE_GAUGE != ds->type)) {
+ log_err ("hv2data_source: Invalid DS type.");
+ return -1;
+ }
+ }
+ else {
+ ds->type = DS_TYPE_COUNTER;
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, hash, "min", 3, 0)))
+ ds->min = SvNV (*tmp);
+ else
+ ds->min = NAN;
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, hash, "max", 3, 0)))
+ ds->max = SvNV (*tmp);
+ else
+ ds->max = NAN;
+ return 0;
+} /* static data_source_t *hv2data_source (HV *) */
+
+static int av2value (char *name, AV *array, value_t *value, int len)
+{
+ SV **tmp = NULL;
+
+ ds_types_t *ds = NULL;
+
+ int i = 0;
+
+ if ((NULL == name) || (NULL == array) || (NULL == value))
+ return -1;
+
+ if (Perl_av_len (perl, array) < len - 1)
+ len = Perl_av_len (perl, array) + 1;
+
+ if (0 >= len)
+ return -1;
+
+ tmp = Perl_hv_fetch (perl, data_sets, name, strlen (name), 0);
+ if (NULL == tmp) {
+ log_err ("av2value: No dataset for \"%s\".", name);
+ return -1;
+ }
+ ds = (ds_types_t *)SvIV ((SV *)SvRV (*tmp));
+
+ if (ds->len < len) {
+ log_warn ("av2value: Value length exceeds data set length.");
+ len = ds->len;
+ }
+
+ for (i = 0; i < len; ++i) {
+ SV **tmp = Perl_av_fetch (perl, array, i, 0);
+
+ if (NULL != tmp) {
+ if (DS_TYPE_COUNTER == ds->values[i])
+ value[i].counter = SvIV (*tmp);
+ else
+ value[i].gauge = SvNV (*tmp);
+ }
+ else {
+ return -1;
+ }
+ }
+ return len;
+} /* static int av2value (char *, AV *, value_t *, int) */
+
+static int data_set2av (data_set_t *ds, AV *array)
+{
+ int i = 0;
+
+ if ((NULL == ds) || (NULL == array))
+ return -1;
+
+ Perl_av_extend (perl, array, ds->ds_num);
+
+ for (i = 0; i < ds->ds_num; ++i) {
+ HV *source = Perl_newHV (perl);
+
+ if (NULL == Perl_hv_store (perl, source, "name", 4,
+ Perl_newSVpv (perl, ds->ds[i].name, 0), 0))
+ return -1;
+
+ if (NULL == Perl_hv_store (perl, source, "type", 4,
+ Perl_newSViv (perl, ds->ds[i].type), 0))
+ return -1;
+
+ if (! isnan (ds->ds[i].min))
+ if (NULL == Perl_hv_store (perl, source, "min", 3,
+ Perl_newSVnv (perl, ds->ds[i].min), 0))
+ return -1;
+
+ if (! isnan (ds->ds[i].max))
+ if (NULL == Perl_hv_store (perl, source, "max", 3,
+ Perl_newSVnv (perl, ds->ds[i].max), 0))
+ return -1;
+
+ if (NULL == Perl_av_store (perl, array, i,
+ Perl_newRV_noinc (perl, (SV *)source)))
+ return -1;
+ }
+ return 0;
+} /* static int data_set2av (data_set_t *, AV *) */
+
+static int value_list2hv (value_list_t *vl, data_set_t *ds, HV *hash)
+{
+ AV *values = NULL;
+
+ int i = 0;
+ int len = 0;
+
+ if ((NULL == vl) || (NULL == ds) || (NULL == hash))
+ return -1;
+
+ len = vl->values_len;
+
+ if (ds->ds_num < len) {
+ log_warn ("value2av: Value length exceeds data set length.");
+ len = ds->ds_num;
+ }
+
+ values = Perl_newAV (perl);
+ Perl_av_extend (perl, values, len - 1);
+
+ for (i = 0; i < len; ++i) {
+ SV *val = NULL;
+
+ if (DS_TYPE_COUNTER == ds->ds[i].type)
+ val = Perl_newSViv (perl, vl->values[i].counter);
+ else
+ val = Perl_newSVnv (perl, vl->values[i].gauge);
+
+ if (NULL == Perl_av_store (perl, values, i, val)) {
+ Perl_av_undef (perl, values);
+ return -1;
+ }
+ }
+
+ if (NULL == Perl_hv_store (perl, hash, "values", 6,
+ Perl_newRV_noinc (perl, (SV *)values), 0))
+ return -1;
+
+ if (0 != vl->time)
+ if (NULL == Perl_hv_store (perl, hash, "time", 4,
+ Perl_newSViv (perl, vl->time), 0))
+ return -1;
+
+ if ('\0' != vl->host[0])
+ if (NULL == Perl_hv_store (perl, hash, "host", 4,
+ Perl_newSVpv (perl, vl->host, 0), 0))
+ return -1;
+
+ if ('\0' != vl->plugin[0])
+ if (NULL == Perl_hv_store (perl, hash, "plugin", 6,
+ Perl_newSVpv (perl, vl->plugin, 0), 0))
+ return -1;
+
+ if ('\0' != vl->plugin_instance[0])
+ if (NULL == Perl_hv_store (perl, hash, "plugin_instance", 15,
+ Perl_newSVpv (perl, vl->plugin_instance, 0), 0))
+ return -1;
+
+ if ('\0' != vl->type_instance[0])
+ if (NULL == Perl_hv_store (perl, hash, "type_instance", 13,
+ Perl_newSVpv (perl, vl->type_instance, 0), 0))
+ return -1;
+ return 0;
+} /* static int value2av (value_list_t *, data_set_t *, HV *) */
+
+
+/*
+ * Internal functions.
+ */
+
+/*
+ * Add a new plugin with the given name.
+ */
+static int pplugin_register (int type, const char *name, SV *sub)
+{
+ pplugin_t *p = NULL;
+
+ if ((type < 0) || (type >= PLUGIN_TYPES))
+ return -1;
+
+ if (NULL == name)
+ return -1;
+
+ p = (pplugin_t *)smalloc (sizeof (pplugin_t));
+ /* this happens during parsing of config file,
+ * thus interval_g is not set correctly */
+ p->wait_time = 10;
+ p->wait_left = 0;
+ p->sub = Perl_newSVsv (perl, sub);
+
+ if (NULL == Perl_hv_store (perl, plugins[type], name, strlen (name),
+ Perl_sv_setref_pv (perl, Perl_newSV (perl, 0), 0, p), 0)) {
+ log_debug ("pplugin_register: Failed to add plugin \"%s\" (\"%s\")",
+ name, SvPV_nolen (sub));
+ Perl_sv_free (perl, p->sub);
+ sfree (p);
+ return -1;
+ }
+ return 0;
+} /* static int pplugin_register (int, char *, SV *) */
+
+/*
+ * Removes the plugin with the given name and frees any ressources.
+ */
+static int pplugin_unregister (int type, char *name)
+{
+ SV *tmp = NULL;
+
+ if ((type < 0) || (type >= PLUGIN_TYPES))
+ return -1;
+
+ if (NULL == name)
+ return -1;
+
+ /* freeing the allocated memory of the element itself (pplugin_t *) causes
+ * a segfault during perl_destruct () thus I assume perl somehow takes
+ * care of this... */
+
+ tmp = Perl_hv_delete (perl, plugins[type], name, strlen (name), 0);
+ if (NULL != tmp) {
+ pplugin_t *p = (pplugin_t *)SvIV ((SV *)SvRV (tmp));
+ Perl_sv_free (perl, p->sub);
+ }
+ return 0;
+} /* static int pplugin_unregister (char *) */
+
+/*
+ * Add a plugin's data set definition.
+ */
+static int pplugin_register_data_set (char *name, AV *dataset)
+{
+ int len = -1;
+ int i = 0;
+
+ data_source_t *ds = NULL;
+ data_set_t *set = NULL;
+
+ ds_types_t *types = NULL;
+
+ if ((NULL == name) || (NULL == dataset))
+ return -1;
+
+ len = Perl_av_len (perl, dataset);
+
+ if (-1 == len)
+ return -1;
+
+ ds = (data_source_t *)smalloc ((len + 1) * sizeof (data_source_t));
+ set = (data_set_t *)smalloc (sizeof (data_set_t));
+
+ types = (ds_types_t *)smalloc (sizeof (ds_types_t));
+ types->len = len + 1;
+ types->values = (int *)smalloc ((types->len) * sizeof (int));
+
+ for (i = 0; i <= len; ++i) {
+ SV **elem = Perl_av_fetch (perl, dataset, i, 0);
+
+ if (NULL == elem)
+ return -1;
+
+ if (! (SvROK (*elem) && (SVt_PVHV == SvTYPE (SvRV (*elem))))) {
+ log_err ("pplugin_register_data_set: Invalid data source.");
+ return -1;
+ }
+
+ if (-1 == hv2data_source ((HV *)SvRV (*elem), &ds[i]))
+ return -1;
+
+ types->values[i] = ds[i].type;
+ log_debug ("pplugin_register_data_set: "
+ "DS.name = \"%s\", DS.type = %i, DS.min = %f, DS.max = %f",
+ ds[i].name, ds[i].type, ds[i].min, ds[i].max);
+ }
+
+ if (NULL == Perl_hv_store (perl, data_sets, name, strlen (name),
+ Perl_sv_setref_pv (perl, Perl_newSV (perl, 0), 0, types), 0))
+ return -1;
+
+ strncpy (set->type, name, DATA_MAX_NAME_LEN);
+ set->type[DATA_MAX_NAME_LEN - 1] = '\0';
+
+ set->ds_num = len + 1;
+ set->ds = ds;
+ return plugin_register_data_set (set);
+} /* static int pplugin_register_data_set (char *, SV *) */
+
+/*
+ * Remove a plugin's data set definition.
+ */
+static int pplugin_unregister_data_set (char *name)
+{
+ SV *tmp = NULL;
+
+ if (NULL == name)
+ return 0;
+
+ /* freeing the allocated memory of the element itself (ds_types_t *)
+ * causes a segfault during perl_destruct () thus I assume perl somehow
+ * takes care of this... */
+
+ tmp = Perl_hv_delete (perl, data_sets, name, strlen (name), 0);
+ if (NULL != tmp) {
+ ds_types_t *ds = (ds_types_t *)SvIV ((SV *)SvRV (tmp));
+ sfree (ds->values);
+ }
+ return plugin_unregister_data_set (name);
+} /* static int pplugin_unregister_data_set (char *) */
+
+/*
+ * Submit the values to the write functions.
+ *
+ * value list:
+ * {
+ * values => [ @values ],
+ * time => $time,
+ * host => $host,
+ * plugin => $plugin,
+ * plugin_instance => $pinstance,
+ * type_instance => $tinstance,
+ * }
+ */
+static int pplugin_dispatch_values (char *name, HV *values)
+{
+ value_list_t list = VALUE_LIST_INIT;
+ value_t *val = NULL;
+
+ SV **tmp = NULL;
+
+ int ret = 0;
+
+ if ((NULL == name) || (NULL == values))
+ return -1;
+
+ if ((NULL == (tmp = Perl_hv_fetch (perl, values, "values", 6, 0)))
+ || (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
+ log_err ("pplugin_dispatch_values: No valid values given.");
+ return -1;
+ }
+
+ {
+ AV *array = (AV *)SvRV (*tmp);
+ int len = Perl_av_len (perl, array) + 1;
+
+ val = (value_t *)smalloc (len * sizeof (value_t));
+
+ list.values_len = av2value (name, (AV *)SvRV (*tmp), val, len);
+ list.values = val;
+
+ if (-1 == list.values_len) {
+ sfree (val);
+ return -1;
+ }
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, values, "time", 4, 0))) {
+ list.time = (time_t)SvIV (*tmp);
+ }
+ else {
+ list.time = time (NULL);
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, values, "host", 4, 0))) {
+ strncpy (list.host, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
+ }
+ else {
+ strcpy (list.host, hostname_g);
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, values, "plugin", 6, 0))) {
+ strncpy (list.plugin, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
+ list.plugin[DATA_MAX_NAME_LEN - 1] = '\0';
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, values,
+ "plugin_instance", 15, 0))) {
+ strncpy (list.plugin_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
+ list.plugin_instance[DATA_MAX_NAME_LEN - 1] = '\0';
+ }
+
+ if (NULL != (tmp = Perl_hv_fetch (perl, values, "type_instance", 13, 0))) {
+ strncpy (list.type_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
+ list.type_instance[DATA_MAX_NAME_LEN - 1] = '\0';
+ }
+
+ ret = plugin_dispatch_values (name, &list);
+
+ sfree (val);
+ return ret;
+} /* static int pplugin_dispatch_values (char *, HV *) */
+
+/*
+ * Call a plugin's working function.
+ */
+static int pplugin_call (int type, char *name, SV *sub, va_list ap)
+{
+ int retvals = 0;
+ I32 xflags = G_NOARGS;
+
+ int ret = 0;
+
+ dSP;
+
+ if ((type < 0) || (type >= PLUGIN_TYPES))
+ return -1;
+
+ ENTER;
+ SAVETMPS;
+
+ PUSHMARK (SP);
+
+ if (PLUGIN_WRITE == type) {
+ /*
+ * $_[0] = $plugin_type;
+ *
+ * $_[1] =
+ * [
+ * {
+ * name => $ds_name,
+ * type => $ds_type,
+ * min => $ds_min,
+ * max => $ds_max
+ * },
+ * ...
+ * ];
+ *
+ * $_[2] =
+ * {
+ * values => [ $v1, ... ],
+ * time => $time,
+ * host => $hostname,
+ * plugin => $plugin,
+ * plugin_instance => $instance,
+ * type_instance => $type_instance
+ * };
+ */
+ data_set_t *ds;
+ value_list_t *vl;
+
+ AV *pds = Perl_newAV (perl);
+ HV *pvl = Perl_newHV (perl);
+
+ ds = va_arg (ap, data_set_t *);
+ vl = va_arg (ap, value_list_t *);
+
+ if (-1 == data_set2av (ds, pds))
+ return -1;
+
+ if (-1 == value_list2hv (vl, ds, pvl))
+ return -1;
+
+ XPUSHs (sv_2mortal (Perl_newSVpv (perl, ds->type, 0)));
+ XPUSHs (sv_2mortal (Perl_newRV_noinc (perl, (SV *)pds)));
+ XPUSHs (sv_2mortal (Perl_newRV_noinc (perl, (SV *)pvl)));
+
+ xflags = 0;
+ }
+ else if (PLUGIN_LOG == type) {
+ /*
+ * $_[0] = $level;
+ *
+ * $_[1] = $message;
+ */
+ XPUSHs (sv_2mortal (Perl_newSViv (perl, va_arg (ap, int))));
+ XPUSHs (sv_2mortal (Perl_newSVpv (perl, va_arg (ap, char *), 0)));
+
+ xflags = 0;
+ }
+
+ PUTBACK;
+
+ /* prevent an endless loop */
+ if (PLUGIN_LOG != type)
+ log_debug ("pplugin_call: executing Collectd::plugin::%s->%s()",
+ name, plugin_types[type]);
+
+ retvals = Perl_call_sv (perl, sub, G_SCALAR | xflags);
+
+ SPAGAIN;
+ if (1 > retvals) {
+ if (PLUGIN_LOG != type)
+ log_warn ("pplugin_call: "
+ "Collectd::plugin::%s->%s() returned void - assuming true",
+ name, plugin_types[type]);
+ }
+ else {
+ SV *tmp = POPs;
+ if (! SvTRUE (tmp))
+ ret = -1;
+ }
+
+ PUTBACK;
+ FREETMPS;
+ LEAVE;
+ return ret;
+} /* static int pplugin_call (int, char *, SV *, va_list) */
+
+/*
+ * Call all working functions of the given type.
+ */
+static int pplugin_call_all (int type, ...)
+{
+ SV *tmp = NULL;
+
+ char *plugin;
+ I32 len;
+
+ if ((type < 0) || (type >= PLUGIN_TYPES))
+ return -1;
+
+ if (0 == Perl_hv_iterinit (perl, plugins[type]))
+ return 0;
+
+ while (NULL != (tmp = Perl_hv_iternextsv (perl, plugins[type],
+ &plugin, &len))) {
+ pplugin_t *p;
+ va_list ap;
+
+ int status;
+
+ va_start (ap, type);
+
+ p = (pplugin_t *)SvIV ((SV *)SvRV (tmp));
+
+ if (p->wait_left > 0)
+ p->wait_left -= interval_g;
+
+ if (p->wait_left > 0)
+ continue;
+
+ if (0 == (status = pplugin_call (type, plugin, p->sub, ap))) {
+ p->wait_left = 0;
+ p->wait_time = interval_g;
+ }
+ else if (PLUGIN_READ == type) {
+ p->wait_left = p->wait_time;
+ p->wait_time <<= 1;
+
+ if (p->wait_time > 86400)
+ p->wait_time = 86400;
+
+ log_warn ("Collectd::plugin::%s->read() failed. "
+ "Will suspend it for %i seconds.",
+ plugin, p->wait_left);
+ }
+ else if (PLUGIN_INIT == type) {
+ int i = 0;
+
+ log_err ("Collectd::plugin::%s->init() failed. "
+ "Plugin will be disabled.", plugin, status);
+
+ for (i = 0; i < PLUGIN_TYPES; ++i)
+ pplugin_unregister (i, plugin);
+ }
+ else if (PLUGIN_LOG != type) {
+ log_warn ("Collectd::plugin::%s->%s() failed with status %i.",
+ plugin, plugin_types[type], status);
+ }
+
+ va_end (ap);
+ }
+ return 0;
+} /* static int pplugin_call_all (int, ...) */
+
+
+/*
+ * Exported Perl API.
+ */
+
+/*
+ * Collectd::plugin_register (type, name, data).
+ *
+ * type:
+ * init, read, write, shutdown, data set
+ *
+ * name:
+ * name of the plugin
+ *
+ * data:
+ * reference to the plugin's subroutine that does the work or the data set
+ * definition
+ */
+static XS (Collectd_plugin_register)
+{
+ int type = 0;
+ SV *data = NULL;
+
+ int ret = 0;
+
+ dXSARGS;
+
+ if (3 != items) {
+ log_err ("Usage: Collectd::plugin_register(type, name, data)");
+ XSRETURN_EMPTY;
+ }
+
+ log_debug ("Collectd::plugin_register: "
+ "type = \"%i\", name = \"%s\", \"%s\"",
+ (int)SvIV (ST (0)), SvPV_nolen (ST (1)), SvPV_nolen (ST (2)));
+
+ type = (int)SvIV (ST (0));
+ data = ST (2);
+
+ if ((type >= 0) && (type < PLUGIN_TYPES)
+ && SvROK (data) && (SVt_PVCV == SvTYPE (SvRV (data)))) {
+ ret = pplugin_register (type, SvPV_nolen (ST (1)), data);
+ }
+ else if ((type == PLUGIN_DATASET)
+ && SvROK (data) && (SVt_PVAV == SvTYPE (SvRV (data)))) {
+ ret = pplugin_register_data_set (SvPV_nolen (ST (1)),
+ (AV *)SvRV (data));
+ }
+ else {
+ log_err ("Collectd::plugin_register: Invalid data.");
+ XSRETURN_EMPTY;
+ }
+
+ if (0 == ret)
+ XSRETURN_YES;
+ else
+ XSRETURN_EMPTY;
+} /* static XS (Collectd_plugin_register) */
+
+/*
+ * Collectd::plugin_unregister (type, name).
+ *
+ * type:
+ * init, read, write, shutdown, data set
+ *
+ * name:
+ * name of the plugin
+ */
+static XS (Collectd_plugin_unregister)
+{
+ int type = 0;
+ int ret = 0;
+
+ dXSARGS;
+
+ if (2 != items) {
+ log_err ("Usage: Collectd::plugin_unregister(type, name)");
+ XSRETURN_EMPTY;
+ }
+
+ log_debug ("Collectd::plugin_unregister: type = \"%i\", name = \"%s\"",
+ (int)SvIV (ST (0)), SvPV_nolen (ST (1)));
+
+ type = (int)SvIV (ST (0));
+
+ if ((type >= 0) && (type < PLUGIN_TYPES)) {
+ ret = pplugin_unregister (type, SvPV_nolen (ST (1)));
+ }
+ else if (type == PLUGIN_DATASET) {
+ ret = pplugin_unregister_data_set (SvPV_nolen (ST (1)));
+ }
+ else {
+ log_err ("Collectd::plugin_unregister: Invalid type.");
+ XSRETURN_EMPTY;
+ }
+
+ if (0 == ret)
+ XSRETURN_YES;
+ else
+ XSRETURN_EMPTY;
+} /* static XS (Collectd_plugin_unregister) */
+
+/*
+ * Collectd::plugin_dispatch_values (name, values).
+ *
+ * name:
+ * name of the plugin
+ *
+ * values:
+ * value list to submit
+ */
+static XS (Collectd_plugin_dispatch_values)
+{
+ SV *values = NULL;
+
+ int ret = 0;
+
+ dXSARGS;
+
+ items = 2;
+ if (2 != items) {
+ log_err ("Usage: Collectd::plugin_dispatch_values(name, values)");
+ XSRETURN_EMPTY;
+ }
+
+ log_debug ("Collectd::plugin_dispatch_values: "
+ "name = \"%s\", values=\"%s\"",
+ SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
+
+ values = ST (1);
+
+ if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
+ log_err ("Collectd::plugin_dispatch_values: Invalid values.");
+ XSRETURN_EMPTY;
+ }
+
+ if ((NULL == ST (0)) || (NULL == values))
+ XSRETURN_EMPTY;
+
+ ret = pplugin_dispatch_values (SvPV_nolen (ST (0)), (HV *)SvRV (values));
+
+ if (0 == ret)
+ XSRETURN_YES;
+ else
+ XSRETURN_EMPTY;
+} /* static XS (Collectd_plugin_dispatch_values) */
+
+/*
+ * Collectd::bootstrap ().
+ */
+static XS (boot_Collectd)
+{
+ HV *stash = NULL;
+ char *file = __FILE__;
+
+ struct {
+ char name[64];
+ SV *value;
+ } consts[] =
+ {
+ { "Collectd::TYPE_INIT", Perl_newSViv (perl, PLUGIN_INIT) },
+ { "Collectd::TYPE_READ", Perl_newSViv (perl, PLUGIN_READ) },
+ { "Collectd::TYPE_WRITE", Perl_newSViv (perl, PLUGIN_WRITE) },
+ { "Collectd::TYPE_SHUTDOWN", Perl_newSViv (perl, PLUGIN_SHUTDOWN) },
+ { "Collectd::TYPE_LOG", Perl_newSViv (perl, PLUGIN_LOG) },
+ { "Collectd::TYPE_DATASET", Perl_newSViv (perl, PLUGIN_DATASET) },
+ { "Collectd::DS_TYPE_COUNTER", Perl_newSViv (perl, DS_TYPE_COUNTER) },
+ { "Collectd::DS_TYPE_GAUGE", Perl_newSViv (perl, DS_TYPE_GAUGE) },
+ { "Collectd::LOG_ERR", Perl_newSViv (perl, LOG_ERR) },
+ { "Collectd::LOG_WARNING", Perl_newSViv (perl, LOG_WARNING) },
+ { "Collectd::LOG_NOTICE", Perl_newSViv (perl, LOG_NOTICE) },
+ { "Collectd::LOG_INFO", Perl_newSViv (perl, LOG_INFO) },
+ { "Collectd::LOG_DEBUG", Perl_newSViv (perl, LOG_DEBUG) },
+ { "", NULL }
+ };
+
+ int i = 0;
+
+ dXSARGS;
+
+ if ((1 > items) || (2 < items)) {
+ log_err ("Usage: Collectd::bootstrap(name[, version])");
+ XSRETURN_EMPTY;
+ }
+
+ XS_VERSION_BOOTCHECK;
+
+ /* register API */
+ for (i = 0; NULL != api[i].f; ++i)
+ Perl_newXS (perl, api[i].name, api[i].f, file);
+
+ stash = Perl_gv_stashpv (perl, "Collectd", 1);
+
+ /* export "constants" */
+ for (i = 0; NULL != consts[i].value; ++i)
+ Perl_newCONSTSUB (perl, stash, consts[i].name, consts[i].value);
+ XSRETURN_YES;
+} /* static XS (boot_Collectd) */
+
+
+/*
+ * Interface to collectd.
+ */
+
+static int perl_config (const char *key, const char *value)
+{
+ log_debug ("perl_config: key = \"%s\", value=\"%s\"", key, value);
+
+ if (0 == strcasecmp (key, "LoadPlugin")) {
+ log_debug ("perl_config: loading perl plugin \"%s\"", value);
+
+ Perl_load_module (perl, PERL_LOADMOD_NOIMPORT,
+ Perl_newSVpvf (perl, "Collectd::plugin::%s", value),
+ Nullsv);
+ }
+ else {
+ return -1;
+ }
+ return 0;
+} /* static int perl_config (char *, char *) */
+
+static int perl_init (void)
+{
+ PERL_SET_CONTEXT (perl);
+ return pplugin_call_all (PLUGIN_INIT);
+} /* static int perl_init (void) */
+
+static int perl_read (void)
+{
+ PERL_SET_CONTEXT (perl);
+ return pplugin_call_all (PLUGIN_READ);
+} /* static int perl_read (void) */
+
+static int perl_write (const data_set_t *ds, const value_list_t *vl)
+{
+ PERL_SET_CONTEXT (perl);
+ return pplugin_call_all (PLUGIN_WRITE, ds, vl);
+} /* static int perl_write (const data_set_t *, const value_list_t *) */
+
+static void perl_log (int level, const char *msg)
+{
+ PERL_SET_CONTEXT (perl);
+ pplugin_call_all (PLUGIN_LOG, level, msg);
+ return;
+} /* static void perl_log (int, const char *) */
+
+static int perl_shutdown (void)
+{
+ int i = 0;
+ int ret = 0;
+
+ PERL_SET_CONTEXT (perl);
+ ret = pplugin_call_all (PLUGIN_SHUTDOWN);
+
+ for (i = 0; i < PLUGIN_TYPES; ++i) {
+ if (0 < Perl_hv_iterinit (perl, plugins[i])) {
+ char *k = NULL;
+ I32 l = 0;
+
+ while (NULL != Perl_hv_iternextsv (perl, plugins[i], &k, &l)) {
+ pplugin_unregister (i, k);
+ }
+ }
+
+ Perl_hv_undef (perl, plugins[i]);
+ }
+
+ if (0 < Perl_hv_iterinit (perl, data_sets)) {
+ char *k = NULL;
+ I32 l = 0;
+
+ while (NULL != Perl_hv_iternextsv (perl, data_sets, &k, &l)) {
+ pplugin_unregister_data_set (k);
+ }
+ }
+
+ Perl_hv_undef (perl, data_sets);
+
+#if COLLECT_DEBUG
+ Perl_sv_report_used (perl);
+#endif /* COLLECT_DEBUG */
+
+ perl_destruct (perl);
+ perl_free (perl);
+
+ PERL_SYS_TERM ();
+ return ret;
+} /* static void perl_shutdown (void) */
+
+static void xs_init (pTHX)
+{
+ char *file = __FILE__;
+
+ dXSUB_SYS;
+
+ /* build the Collectd module into the perl interpreter */
+ Perl_newXS (perl, "Collectd::bootstrap", boot_Collectd, file);
+
+ /* enable usage of Perl modules using shared libraries */
+ Perl_newXS (perl, "DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
+ return;
+} /* static void xs_init (pTHX) */
+
+/*
+ * Create the perl interpreter and register it with collectd.
+ */
+void module_register (void)
+{
+ char *embed_argv[] = { "", "-e", "bootstrap Collectd \""VERSION"\"", NULL };
+ int embed_argc = 3;
+
+ int i = 0;
+
+ log_debug ("module_register: Registering perl plugin...");
+
+ PERL_SYS_INIT3 (&argc, &argv, &environ);
+
+ if (NULL == (perl = perl_alloc ())) {
+ log_err ("module_register: Not enough memory.");
+ exit (3);
+ }
+ perl_construct (perl);
+
+ PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
+
+ if (0 != perl_parse (perl, xs_init, embed_argc, embed_argv, NULL)) {
+ log_err ("module_register: Unable to bootstrap Collectd.");
+ exit (1);
+ }
+ perl_run (perl);
+
+ for (i = 0; i < PLUGIN_TYPES; ++i)
+ plugins[i] = Perl_newHV (perl);
+
+ data_sets = Perl_newHV (perl);
+
+ plugin_register_log ("perl", perl_log);
+ plugin_register_config ("perl", perl_config, config_keys, config_keys_num);
+ plugin_register_init ("perl", perl_init);
+ plugin_register_read ("perl", perl_read);
+ plugin_register_write ("perl", perl_write);
+ plugin_register_shutdown ("perl", perl_shutdown);
+ return;
+} /* void module_register (void) */
+
+/* vim: set sw=4 ts=4 tw=78 noexpandtab : */
+