144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/***************************************************************************
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* Copyright (C) 06/2006 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <limits.h>
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#include "configfile.h"
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#include "event.h"
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#include "logging.h"
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#include "network.h"
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#include "plugins.h"
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static LIST_HEAD(plugin_list);
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static char *scratchpad;
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static int plugin_init_cb(const char *filename, void *privdata)
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{
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int *bufsize = (int *)privdata;
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static const char *plugin_dir;
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if (plugin_dir == NULL)
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plugin_dir = config_get_string("global", "plugin_dir", ".");
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char *buffer = malloc(PATH_MAX);
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if (buffer == NULL) {
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log_print(LOG_ERROR, "plugin_load: out of memory");
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return -1;
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}
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int len = snprintf(buffer, PATH_MAX, "%s/%s", plugin_dir, filename);
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if (len < 0 || len >= PATH_MAX) {
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log_print(LOG_ERROR, "plugin_load: file name too long: %s/%s", plugin_dir, filename);
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free(buffer);
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return -1;
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}
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dlerror();
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void *tmp = dlopen(buffer, RTLD_NOW);
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if (tmp == NULL) {
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log_print(LOG_ERROR, "plugin_load: dlopen: %s", dlerror());
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free(buffer);
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return -1;
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}
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free(buffer);
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struct sammler_plugin *plugin = dlsym(tmp, "plugin");
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if (plugin == NULL) {
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log_print(LOG_ERROR, "plugin_load: failed to load '%s'", filename);
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dlclose(tmp);
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return -1;
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}
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log_print(LOG_INFO, "Plugin '%s' loaded", plugin->name);
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plugin->lastprobe = 0;
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if (plugin->init != NULL && (plugin->init() != 0)) {
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log_print(LOG_ERROR, "Plugin '%s': init failed", plugin->name);
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return -1;
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}
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if (plugin->bufsize > *bufsize)
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*bufsize = plugin->bufsize;
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list_add_tail(&plugin->list, &plugin_list);
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return 0;
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}
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static int plugins_probe(void *privdata)
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{
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time_t now;
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time(&now);
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struct sammler_plugin *plugin;
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list_for_each_entry(plugin, &plugin_list, list) {
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if (plugin->lastprobe + plugin->interval <= now) {
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plugin->probe();
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plugin->lastprobe = now;
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}
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}
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net_submit_flush();
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return 0;
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}
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int plugin_init(void)
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{
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int bufsize = 0;
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int cnt = config_get_strings("global", "plugin", plugin_init_cb, &bufsize);
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if (cnt == 0) {
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log_print(LOG_ERROR, "plugin_init(): no working plugins");
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return -1;
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}
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scratchpad = malloc(bufsize);
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if (scratchpad == NULL) {
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log_print(LOG_ERROR, "plugin_init(): out of memory");
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return -1;
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}
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struct sammler_plugin *plugin;
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list_for_each_entry(plugin, &plugin_list, list)
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plugin->buffer = scratchpad;
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struct timeval tv;
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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event_add_timeout(&tv, plugins_probe, NULL);
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return 0;
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}
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struct sammler_plugin * plugin_lookup(const char *name)
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{
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struct sammler_plugin *plugin;
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list_for_each_entry(plugin, &plugin_list, list) {
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if (!strcmp(plugin->name, name))
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return plugin;
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}
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return NULL;
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}
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