sammler/plugins.c

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4.2 KiB
C
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2006-06-13 21:34:36 +02:00
/***************************************************************************
* Copyright (C) 06/2006 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "list.h"
#include "plugins.h"
#include "config.h"
#include "logging.h"
#include "rrdtool.h"
#define BUFSIZE 1024
static LIST_HEAD(plugin_list);
static void plugin_load(char *filename)
{
struct sammler_plugin *plugin = NULL;
static char *plugin_dir;
char *buffer;
void *tmp;
int len;
if (plugin_dir == NULL)
plugin_dir = config_get_string("global", "plugin_dir", ".");
buffer = malloc(BUFSIZE);
if (buffer == NULL) {
log_print(LOG_ERROR, "plugin_load: out of memory");
return;
}
len = snprintf(buffer, BUFSIZE, "%s/%s", plugin_dir, filename);
if (len >= BUFSIZE) {
log_print(LOG_ERROR, "plugin_load: file name too long: %s/%s", plugin_dir, filename);
free(buffer);
return;
}
dlerror();
tmp = dlopen(buffer, RTLD_NOW);
if (tmp == NULL) {
log_print(LOG_ERROR, "plugin_load: dlopen: %s", dlerror());
free(buffer);
return;
}
plugin = dlsym(tmp, "plugin");
if (plugin == NULL) {
log_print(LOG_ERROR, "plugin_load: failed to load '%s'", filename);
dlclose(tmp);
free(buffer);
return;
}
log_print(LOG_INFO, "Plugin '%s' (v%d) loaded", plugin->name, plugin->version);
list_add_tail(&plugin->list, &plugin_list);
free(buffer);
return;
}
void plugin_load_all()
{
struct conf_section *section;
struct conf_tupel *tupel;
section = config_get_section("global");
if (section) {
list_for_each_entry(tupel, &section->tupel, list)
if (!strcmp(tupel->option, "plugin"))
plugin_load(tupel->parameter);
}
}
void plugins_probe(void)
{
struct sammler_plugin *plugin;
list_for_each_entry(plugin, &plugin_list, list)
plugin->probe();
}
char ** plugins_get_ds(char *name, int version, int ds_id)
{
struct sammler_plugin *plugin;
list_for_each_entry(plugin, &plugin_list, list) {
if (strcmp(plugin->name, name))
continue;
if (plugin->version != version)
continue;
return plugin->get_ds(ds_id);
}
return NULL;
}
void probe_submit(struct sammler_plugin *plugin, char *filename, int ds_id, const char *fmt, ... )
{
va_list az;
char *buffer;
int len;
buffer = malloc(BUFSIZE);
if (buffer == NULL) {
log_print(LOG_ERROR, "probe_submit: out of memory");
return;
}
va_start(az, fmt);
len = vsnprintf(buffer, BUFSIZE, fmt, az);
va_end(az);
if (len >= BUFSIZE) {
log_print(LOG_ERROR, "probe_submit: %s arguments too long", plugin->name);
free(buffer);
return;
}
rrd_submit(plugin->name, plugin->version, filename, ds_id, buffer);
// net_submit(plugin->name, plugin->version, filename, ds_id, buffer);
free(buffer);
}
int strsplit(char *string, char **fields, size_t size)
{
size_t i = 0;
char *ptr = string;
while ((fields[i] = strtok(ptr, " \n\t")) != NULL) {
ptr = NULL;
i++;
if (i >= size)
break;
}
return i;
}