From: Florian Forster <octo@collectd.org>
Date: Thu, 11 Jun 2015 06:50:12 +0000 (+0100)
Subject: Merge branch 'collectd-5.4' into collectd-5.5
X-Git-Tag: collectd-5.5.1~125
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=cedb6f147e94d0e952449f731313412ef4d67904;p=collectd.git

Merge branch 'collectd-5.4' into collectd-5.5
---

cedb6f147e94d0e952449f731313412ef4d67904
diff --cc src/daemon/configfile.c
index 02fd96f6,00000000..2636a522
mode 100644,000000..100644
--- a/src/daemon/configfile.c
+++ b/src/daemon/configfile.c
@@@ -1,1353 -1,0 +1,1363 @@@
 +/**
 + * collectd - src/configfile.c
 + * Copyright (C) 2005-2011  Florian octo Forster
 + *
 + * Permission is hereby granted, free of charge, to any person obtaining a
 + * copy of this software and associated documentation files (the "Software"),
 + * to deal in the Software without restriction, including without limitation
 + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 + * and/or sell copies of the Software, and to permit persons to whom the
 + * Software is furnished to do so, subject to the following conditions:
 + *
 + * The above copyright notice and this permission notice shall be included in
 + * all copies or substantial portions of the Software.
 + *
 + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 + * DEALINGS IN THE SOFTWARE.
 + *
 + * Authors:
 + *   Florian octo Forster <octo at collectd.org>
 + *   Sebastian tokkee Harl <sh at tokkee.org>
 + **/
 +
 +#include "collectd.h"
 +
 +#include "liboconfig/oconfig.h"
 +
 +#include "common.h"
 +#include "plugin.h"
 +#include "configfile.h"
 +#include "types_list.h"
 +#include "filter_chain.h"
 +
 +#if HAVE_WORDEXP_H
 +# include <wordexp.h>
 +#endif /* HAVE_WORDEXP_H */
 +
 +#if HAVE_FNMATCH_H
 +# include <fnmatch.h>
 +#endif /* HAVE_FNMATCH_H */
 +
 +#if HAVE_LIBGEN_H
 +# include <libgen.h>
 +#endif /* HAVE_LIBGEN_H */
 +
 +#define ESCAPE_NULL(str) ((str) == NULL ? "(null)" : (str))
 +
 +/*
 + * Private types
 + */
 +typedef struct cf_callback
 +{
 +	const char  *type;
 +	int  (*callback) (const char *, const char *);
 +	const char **keys;
 +	int    keys_num;
 +	plugin_ctx_t ctx;
 +	struct cf_callback *next;
 +} cf_callback_t;
 +
 +typedef struct cf_complex_callback_s
 +{
 +	char *type;
 +	int (*callback) (oconfig_item_t *);
 +	plugin_ctx_t ctx;
 +	struct cf_complex_callback_s *next;
 +} cf_complex_callback_t;
 +
 +typedef struct cf_value_map_s
 +{
 +	char *key;
 +	int (*func) (const oconfig_item_t *);
 +} cf_value_map_t;
 +
 +typedef struct cf_global_option_s
 +{
 +	char *key;
 +	char *value;
 +	char *def;
 +} cf_global_option_t;
 +
 +/*
 + * Prototypes of callback functions
 + */
 +static int dispatch_value_typesdb (const oconfig_item_t *ci);
 +static int dispatch_value_plugindir (const oconfig_item_t *ci);
 +static int dispatch_loadplugin (const oconfig_item_t *ci);
 +
 +/*
 + * Private variables
 + */
 +static cf_callback_t *first_callback = NULL;
 +static cf_complex_callback_t *complex_callback_head = NULL;
 +
 +static cf_value_map_t cf_value_map[] =
 +{
 +	{"TypesDB",    dispatch_value_typesdb},
 +	{"PluginDir",  dispatch_value_plugindir},
 +	{"LoadPlugin", dispatch_loadplugin}
 +};
 +static int cf_value_map_num = STATIC_ARRAY_SIZE (cf_value_map);
 +
 +static cf_global_option_t cf_global_options[] =
 +{
 +	{"BaseDir",     NULL, PKGLOCALSTATEDIR},
 +	{"PIDFile",     NULL, PIDFILE},
 +	{"Hostname",    NULL, NULL},
 +	{"FQDNLookup",  NULL, "true"},
 +	{"Interval",    NULL, NULL},
 +	{"ReadThreads", NULL, "5"},
 +	{"WriteThreads", NULL, "5"},
 +	{"WriteQueueLimitHigh", NULL, NULL},
 +	{"WriteQueueLimitLow", NULL, NULL},
 +	{"Timeout",     NULL, "2"},
 +	{"AutoLoadPlugin", NULL, "false"},
 +	{"CollectInternalStats", NULL, "false"},
 +	{"PreCacheChain",  NULL, "PreCache"},
 +	{"PostCacheChain", NULL, "PostCache"},
 +	{"MaxReadInterval", NULL, "86400"}
 +};
 +static int cf_global_options_num = STATIC_ARRAY_SIZE (cf_global_options);
 +
 +static int cf_default_typesdb = 1;
 +
 +/*
 + * Functions to handle register/unregister, search, and other plugin related
 + * stuff
 + */
 +static cf_callback_t *cf_search (const char *type)
 +{
 +	cf_callback_t *cf_cb;
 +
 +	if (type == NULL)
 +		return (NULL);
 +
 +	for (cf_cb = first_callback; cf_cb != NULL; cf_cb = cf_cb->next)
 +		if (strcasecmp (cf_cb->type, type) == 0)
 +			break;
 +
 +	return (cf_cb);
 +}
 +
 +static int cf_dispatch (const char *type, const char *orig_key,
 +		const char *orig_value)
 +{
 +	cf_callback_t *cf_cb;
 +	plugin_ctx_t old_ctx;
 +	char *key;
 +	char *value;
 +	int ret;
 +	int i;
 +
 +	DEBUG ("type = %s, key = %s, value = %s",
 +			ESCAPE_NULL(type),
 +			ESCAPE_NULL(orig_key),
 +			ESCAPE_NULL(orig_value));
 +
 +	if ((cf_cb = cf_search (type)) == NULL)
 +	{
 +		WARNING ("Found a configuration for the `%s' plugin, but "
 +				"the plugin isn't loaded or didn't register "
 +				"a configuration callback.", type);
 +		return (-1);
 +	}
 +
 +	if ((key = strdup (orig_key)) == NULL)
 +		return (1);
 +	if ((value = strdup (orig_value)) == NULL)
 +	{
 +		free (key);
 +		return (2);
 +	}
 +
 +	ret = -1;
 +
 +	old_ctx = plugin_set_ctx (cf_cb->ctx);
 +
 +	for (i = 0; i < cf_cb->keys_num; i++)
 +	{
 +		if ((cf_cb->keys[i] != NULL)
 +				&& (strcasecmp (cf_cb->keys[i], key) == 0))
 +		{
 +			ret = (*cf_cb->callback) (key, value);
 +			break;
 +		}
 +	}
 +
 +	plugin_set_ctx (old_ctx);
 +
 +	if (i >= cf_cb->keys_num)
 +		WARNING ("Plugin `%s' did not register for value `%s'.", type, key);
 +
 +	free (key);
 +	free (value);
 +
 +	DEBUG ("cf_dispatch: return (%i)", ret);
 +
 +	return (ret);
 +} /* int cf_dispatch */
 +
 +static int dispatch_global_option (const oconfig_item_t *ci)
 +{
 +	if (ci->values_num != 1)
 +		return (-1);
 +	if (ci->values[0].type == OCONFIG_TYPE_STRING)
 +		return (global_option_set (ci->key, ci->values[0].value.string));
 +	else if (ci->values[0].type == OCONFIG_TYPE_NUMBER)
 +	{
 +		char tmp[128];
 +		ssnprintf (tmp, sizeof (tmp), "%lf", ci->values[0].value.number);
 +		return (global_option_set (ci->key, tmp));
 +	}
 +	else if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
 +	{
 +		if (ci->values[0].value.boolean)
 +			return (global_option_set (ci->key, "true"));
 +		else
 +			return (global_option_set (ci->key, "false"));
 +	}
 +
 +	return (-1);
 +} /* int dispatch_global_option */
 +
 +static int dispatch_value_typesdb (const oconfig_item_t *ci)
 +{
 +	int i = 0;
 +
 +	assert (strcasecmp (ci->key, "TypesDB") == 0);
 +
 +	cf_default_typesdb = 0;
 +
 +	if (ci->values_num < 1) {
 +		ERROR ("configfile: `TypesDB' needs at least one argument.");
 +		return (-1);
 +	}
 +
 +	for (i = 0; i < ci->values_num; ++i)
 +	{
 +		if (OCONFIG_TYPE_STRING != ci->values[i].type) {
 +			WARNING ("configfile: TypesDB: Skipping %i. argument which "
 +					"is not a string.", i + 1);
 +			continue;
 +		}
 +
 +		read_types_list (ci->values[i].value.string);
 +	}
 +	return (0);
 +} /* int dispatch_value_typesdb */
 +
 +static int dispatch_value_plugindir (const oconfig_item_t *ci)
 +{
 +	assert (strcasecmp (ci->key, "PluginDir") == 0);
 +	
 +	if (ci->values_num != 1)
 +		return (-1);
 +	if (ci->values[0].type != OCONFIG_TYPE_STRING)
 +		return (-1);
 +
 +	plugin_set_dir (ci->values[0].value.string);
 +	return (0);
 +}
 +
 +static int dispatch_loadplugin (const oconfig_item_t *ci)
 +{
 +	int i;
 +	const char *name;
 +	unsigned int flags = 0;
 +	plugin_ctx_t ctx;
 +	plugin_ctx_t old_ctx;
 +	int ret_val;
 +
 +	assert (strcasecmp (ci->key, "LoadPlugin") == 0);
 +
 +	if (ci->values_num != 1)
 +		return (-1);
 +	if (ci->values[0].type != OCONFIG_TYPE_STRING)
 +		return (-1);
 +
 +	name = ci->values[0].value.string;
 +	if (strcmp ("libvirt", name) == 0)
 +		name = "virt";
 +
 +	/* default to the global interval set before loading this plugin */
 +	memset (&ctx, 0, sizeof (ctx));
 +	ctx.interval = cf_get_default_interval ();
 +
 +	for (i = 0; i < ci->children_num; ++i) {
 +		if (strcasecmp("Globals", ci->children[i].key) == 0)
 +			cf_util_get_flag (ci->children + i, &flags, PLUGIN_FLAGS_GLOBAL);
 +		else if (strcasecmp ("Interval", ci->children[i].key) == 0) {
 +			if (cf_util_get_cdtime (ci->children + i, &ctx.interval) != 0) {
 +				/* cf_util_get_cdtime will log an error */
 +				continue;
 +			}
 +		}
 +		else {
 +			WARNING("Ignoring unknown LoadPlugin option \"%s\" "
 +					"for plugin \"%s\"",
 +					ci->children[i].key, ci->values[0].value.string);
 +		}
 +	}
 +
 +	old_ctx = plugin_set_ctx (ctx);
 +	ret_val = plugin_load (name, (uint32_t) flags);
 +	/* reset to the "global" context */
 +	plugin_set_ctx (old_ctx);
 +
 +	return (ret_val);
 +} /* int dispatch_value_loadplugin */
 +
 +static int dispatch_value_plugin (const char *plugin, oconfig_item_t *ci)
 +{
 +	char  buffer[4096];
 +	char *buffer_ptr;
 +	int   buffer_free;
 +	int i;
 +
 +	buffer_ptr = buffer;
 +	buffer_free = sizeof (buffer);
 +
 +	for (i = 0; i < ci->values_num; i++)
 +	{
 +		int status = -1;
 +
 +		if (ci->values[i].type == OCONFIG_TYPE_STRING)
 +			status = ssnprintf (buffer_ptr, buffer_free, " %s",
 +					ci->values[i].value.string);
 +		else if (ci->values[i].type == OCONFIG_TYPE_NUMBER)
 +			status = ssnprintf (buffer_ptr, buffer_free, " %lf",
 +					ci->values[i].value.number);
 +		else if (ci->values[i].type == OCONFIG_TYPE_BOOLEAN)
 +			status = ssnprintf (buffer_ptr, buffer_free, " %s",
 +					ci->values[i].value.boolean
 +					? "true" : "false");
 +
 +		if ((status < 0) || (status >= buffer_free))
 +			return (-1);
 +		buffer_free -= status;
 +		buffer_ptr  += status;
 +	}
 +	/* skip the initial space */
 +	buffer_ptr = buffer + 1;
 +
 +	return (cf_dispatch (plugin, ci->key, buffer_ptr));
 +} /* int dispatch_value_plugin */
 +
 +static int dispatch_value (const oconfig_item_t *ci)
 +{
 +	int ret = -2;
 +	int i;
 +
 +	for (i = 0; i < cf_value_map_num; i++)
 +		if (strcasecmp (cf_value_map[i].key, ci->key) == 0)
 +		{
 +			ret = cf_value_map[i].func (ci);
 +			break;
 +		}
 +
 +	for (i = 0; i < cf_global_options_num; i++)
 +		if (strcasecmp (cf_global_options[i].key, ci->key) == 0)
 +		{
 +			ret = dispatch_global_option (ci);
 +			break;
 +		}
 +
 +	return (ret);
 +} /* int dispatch_value */
 +
 +static int dispatch_block_plugin (oconfig_item_t *ci)
 +{
 +	int i;
 +	char *name;
 +
 +	cf_complex_callback_t *cb;
 +
 +	if (strcasecmp (ci->key, "Plugin") != 0)
 +		return (-1);
 +	if (ci->values_num < 1)
 +		return (-1);
 +	if (ci->values[0].type != OCONFIG_TYPE_STRING)
 +		return (-1);
 +
 +	name = ci->values[0].value.string;
 +	if (strcmp ("libvirt", name) == 0)
 +	{
 +		/* TODO(octo): Remove this legacy. */
 +		WARNING ("The \"libvirt\" plugin has been renamed to \"virt\" to avoid problems with the build system. "
 +				"Your configuration is still using the old name. "
 +				"Please change it to use \"virt\" as soon as possible. "
 +				"This compatibility code will go away eventually.");
 +		name = "virt";
 +	}
 +
 +	if (IS_TRUE (global_option_get ("AutoLoadPlugin")))
 +	{
++		plugin_ctx_t ctx;
++		plugin_ctx_t old_ctx;
 +		int status;
 +
++		/* default to the global interval set before loading this plugin */
++		memset (&ctx, 0, sizeof (ctx));
++		ctx.interval = cf_get_default_interval ();
++
++		old_ctx = plugin_set_ctx (ctx);
 +		status = plugin_load (name, /* flags = */ 0);
++		/* reset to the "global" context */
++		plugin_set_ctx (old_ctx);
++
 +		if (status != 0)
 +		{
 +			ERROR ("Automatically loading plugin \"%s\" failed "
 +					"with status %i.", name, status);
 +			return (status);
 +		}
 +	}
 +
 +	/* Check for a complex callback first */
 +	for (cb = complex_callback_head; cb != NULL; cb = cb->next)
 +	{
 +		if (strcasecmp (name, cb->type) == 0)
 +		{
 +			plugin_ctx_t old_ctx;
 +			int ret_val;
 +
 +			old_ctx = plugin_set_ctx (cb->ctx);
 +			ret_val = (cb->callback (ci));
 +			plugin_set_ctx (old_ctx);
 +			return (ret_val);
 +		}
 +	}
 +
 +	/* Hm, no complex plugin found. Dispatch the values one by one */
 +	for (i = 0; i < ci->children_num; i++)
 +	{
 +		if (ci->children[i].children == NULL)
 +			dispatch_value_plugin (name, ci->children + i);
 +		else
 +		{
 +			WARNING ("There is a `%s' block within the "
 +					"configuration for the %s plugin. "
 +					"The plugin either only expects "
 +					"\"simple\" configuration statements "
 +					"or wasn't loaded using `LoadPlugin'."
 +					" Please check your configuration.",
 +					ci->children[i].key, name);
 +		}
 +	}
 +
 +	return (0);
 +}
 +
 +
 +static int dispatch_block (oconfig_item_t *ci)
 +{
 +	if (strcasecmp (ci->key, "LoadPlugin") == 0)
 +		return (dispatch_loadplugin (ci));
 +	else if (strcasecmp (ci->key, "Plugin") == 0)
 +		return (dispatch_block_plugin (ci));
 +	else if (strcasecmp (ci->key, "Chain") == 0)
 +		return (fc_configure (ci));
 +
 +	return (0);
 +}
 +
 +static int cf_ci_replace_child (oconfig_item_t *dst, oconfig_item_t *src,
 +		int offset)
 +{
 +	oconfig_item_t *temp;
 +	int i;
 +
 +	assert (offset >= 0);
 +	assert (dst->children_num > offset);
 +
 +	/* Free the memory used by the replaced child. Usually that's the
 +	 * `Include "blah"' statement. */
 +	temp = dst->children + offset;
 +	for (i = 0; i < temp->values_num; i++)
 +	{
 +		if (temp->values[i].type == OCONFIG_TYPE_STRING)
 +		{
 +			sfree (temp->values[i].value.string);
 +		}
 +	}
 +	sfree (temp->values);
 +	temp = NULL;
 +
 +	/* If (src->children_num == 0) the array size is decreased. If offset
 +	 * is _not_ the last element, (offset < (dst->children_num - 1)), then
 +	 * we need to move the trailing elements before resizing the array. */
 +	if ((src->children_num == 0) && (offset < (dst->children_num - 1)))
 +	{
 +		int nmemb = dst->children_num - (offset + 1);
 +		memmove (dst->children + offset, dst->children + offset + 1,
 +				sizeof (oconfig_item_t) * nmemb);
 +	}
 +
 +	/* Resize the memory containing the children to be big enough to hold
 +	 * all children. */
 +	if (dst->children_num + src->children_num - 1 == 0)
 +	{
 +		dst->children_num = 0;
 +		return (0);
 +	}
 +
 +	temp = (oconfig_item_t *) realloc (dst->children,
 +			sizeof (oconfig_item_t)
 +			* (dst->children_num + src->children_num - 1));
 +	if (temp == NULL)
 +	{
 +		ERROR ("configfile: realloc failed.");
 +		return (-1);
 +	}
 +	dst->children = temp;
 +
 +	/* If there are children behind the include statement, and they have
 +	 * not yet been moved because (src->children_num == 0), then move them
 +	 * to the end of the list, so that the new children have room before
 +	 * them. */
 +	if ((src->children_num > 0)
 +			&& ((dst->children_num - (offset + 1)) > 0))
 +	{
 +		int nmemb = dst->children_num - (offset + 1);
 +		int old_offset = offset + 1;
 +		int new_offset = offset + src->children_num;
 +
 +		memmove (dst->children + new_offset,
 +				dst->children + old_offset,
 +				sizeof (oconfig_item_t) * nmemb);
 +	}
 +
 +	/* Last but not least: If there are new children, copy them to the
 +	 * memory reserved for them. */
 +	if (src->children_num > 0)
 +	{
 +		memcpy (dst->children + offset,
 +				src->children,
 +				sizeof (oconfig_item_t) * src->children_num);
 +	}
 +
 +	/* Update the number of children. */
 +	dst->children_num += (src->children_num - 1);
 +
 +	return (0);
 +} /* int cf_ci_replace_child */
 +
 +static int cf_ci_append_children (oconfig_item_t *dst, oconfig_item_t *src)
 +{
 +	oconfig_item_t *temp;
 +
 +	if ((src == NULL) || (src->children_num == 0))
 +		return (0);
 +
 +	temp = (oconfig_item_t *) realloc (dst->children,
 +			sizeof (oconfig_item_t)
 +			* (dst->children_num + src->children_num));
 +	if (temp == NULL)
 +	{
 +		ERROR ("configfile: realloc failed.");
 +		return (-1);
 +	}
 +	dst->children = temp;
 +
 +	memcpy (dst->children + dst->children_num,
 +			src->children,
 +			sizeof (oconfig_item_t)
 +			* src->children_num);
 +	dst->children_num += src->children_num;
 +
 +	return (0);
 +} /* int cf_ci_append_children */
 +
 +#define CF_MAX_DEPTH 8
 +static oconfig_item_t *cf_read_generic (const char *path,
 +		const char *pattern, int depth);
 +
 +static int cf_include_all (oconfig_item_t *root, int depth)
 +{
 +	int i;
 +
 +	for (i = 0; i < root->children_num; i++)
 +	{
 +		oconfig_item_t *new;
 +		oconfig_item_t *old;
 +
 +		char *pattern = NULL;
 +
 +		int j;
 +
 +		if (strcasecmp (root->children[i].key, "Include") != 0)
 +			continue;
 +
 +		old = root->children + i;
 +
 +		if ((old->values_num != 1)
 +				|| (old->values[0].type != OCONFIG_TYPE_STRING))
 +		{
 +			ERROR ("configfile: `Include' needs exactly one string argument.");
 +			continue;
 +		}
 +
 +		for (j = 0; j < old->children_num; ++j)
 +		{
 +			oconfig_item_t *child = old->children + j;
 +
 +			if (strcasecmp (child->key, "Filter") == 0)
 +				cf_util_get_string (child, &pattern);
 +			else
 +				ERROR ("configfile: Option `%s' not allowed in <Include> block.",
 +						child->key);
 +		}
 +
 +		new = cf_read_generic (old->values[0].value.string, pattern, depth + 1);
 +		sfree (pattern);
 +
 +		if (new == NULL)
 +			return (-1);
 +
 +		/* Now replace the i'th child in `root' with `new'. */
 +		if (cf_ci_replace_child (root, new, i) < 0)
 +			return (-1);
 +
 +		/* ... and go back to the new i'th child. */
 +		--i;
 +
 +		sfree (new->values);
 +		sfree (new);
 +	} /* for (i = 0; i < root->children_num; i++) */
 +
 +	return (0);
 +} /* int cf_include_all */
 +
 +static oconfig_item_t *cf_read_file (const char *file,
 +		const char *pattern, int depth)
 +{
 +	oconfig_item_t *root;
 +	int status;
 +
 +	assert (depth < CF_MAX_DEPTH);
 +
 +	if (pattern != NULL) {
 +#if HAVE_FNMATCH_H && HAVE_LIBGEN_H
 +		char *tmp = sstrdup (file);
 +		char *filename = basename (tmp);
 +
 +		if ((filename != NULL) && (fnmatch (pattern, filename, 0) != 0)) {
 +			DEBUG ("configfile: Not including `%s' because it "
 +					"does not match pattern `%s'.",
 +					filename, pattern);
 +			free (tmp);
 +			return (NULL);
 +		}
 +
 +		free (tmp);
 +#else
 +		ERROR ("configfile: Cannot apply pattern filter '%s' "
 +				"to file '%s': functions basename() and / or "
 +				"fnmatch() not available.", pattern, file);
 +#endif /* HAVE_FNMATCH_H && HAVE_LIBGEN_H */
 +	}
 +
 +	root = oconfig_parse_file (file);
 +	if (root == NULL)
 +	{
 +		ERROR ("configfile: Cannot read file `%s'.", file);
 +		return (NULL);
 +	}
 +
 +	status = cf_include_all (root, depth);
 +	if (status != 0)
 +	{
 +		oconfig_free (root);
 +		return (NULL);
 +	}
 +
 +	return (root);
 +} /* oconfig_item_t *cf_read_file */
 +
 +static int cf_compare_string (const void *p1, const void *p2)
 +{
 +	return strcmp (*(const char **) p1, *(const char **) p2);
 +}
 +
 +static oconfig_item_t *cf_read_dir (const char *dir,
 +		const char *pattern, int depth)
 +{
 +	oconfig_item_t *root = NULL;
 +	DIR *dh;
 +	struct dirent *de;
 +	char **filenames = NULL;
 +	int filenames_num = 0;
 +	int status;
 +	int i;
 +
 +	assert (depth < CF_MAX_DEPTH);
 +
 +	dh = opendir (dir);
 +	if (dh == NULL)
 +	{
 +		char errbuf[1024];
 +		ERROR ("configfile: opendir failed: %s",
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (NULL);
 +	}
 +
 +	root = (oconfig_item_t *) malloc (sizeof (oconfig_item_t));
 +	if (root == NULL)
 +	{
 +		ERROR ("configfile: malloc failed.");
 +		return (NULL);
 +	}
 +	memset (root, 0, sizeof (oconfig_item_t));
 +
 +	while ((de = readdir (dh)) != NULL)
 +	{
 +		char   name[1024];
 +		char **tmp;
 +
 +		if ((de->d_name[0] == '.') || (de->d_name[0] == 0))
 +			continue;
 +
 +		status = ssnprintf (name, sizeof (name), "%s/%s",
 +				dir, de->d_name);
 +		if ((status < 0) || ((size_t) status >= sizeof (name)))
 +		{
 +			ERROR ("configfile: Not including `%s/%s' because its"
 +					" name is too long.",
 +					dir, de->d_name);
 +			for (i = 0; i < filenames_num; ++i)
 +				free (filenames[i]);
 +			free (filenames);
 +			free (root);
 +			return (NULL);
 +		}
 +
 +		++filenames_num;
 +		tmp = (char **) realloc (filenames,
 +				filenames_num * sizeof (*filenames));
 +		if (tmp == NULL) {
 +			ERROR ("configfile: realloc failed.");
 +			for (i = 0; i < filenames_num - 1; ++i)
 +				free (filenames[i]);
 +			free (filenames);
 +			free (root);
 +			return (NULL);
 +		}
 +		filenames = tmp;
 +
 +		filenames[filenames_num - 1] = sstrdup (name);
 +	}
 +
 +	qsort ((void *) filenames, filenames_num, sizeof (*filenames),
 +			cf_compare_string);
 +
 +	for (i = 0; i < filenames_num; ++i)
 +	{
 +		oconfig_item_t *temp;
 +		char *name = filenames[i];
 +
 +		temp = cf_read_generic (name, pattern, depth);
 +		if (temp == NULL)
 +		{
 +			/* An error should already have been reported. */
 +			sfree (name);
 +			continue;
 +		}
 +
 +		cf_ci_append_children (root, temp);
 +		sfree (temp->children);
 +		sfree (temp);
 +
 +		free (name);
 +	}
 +
 +	free(filenames);
 +	return (root);
 +} /* oconfig_item_t *cf_read_dir */
 +
 +/* 
 + * cf_read_generic
 + *
 + * Path is stat'ed and either cf_read_file or cf_read_dir is called
 + * accordingly.
 + *
 + * There are two versions of this function: If `wordexp' exists shell wildcards
 + * will be expanded and the function will include all matches found. If
 + * `wordexp' (or, more precisely, it's header file) is not available the
 + * simpler function is used which does not do any such expansion.
 + */
 +#if HAVE_WORDEXP_H
 +static oconfig_item_t *cf_read_generic (const char *path,
 +		const char *pattern, int depth)
 +{
 +	oconfig_item_t *root = NULL;
 +	int status;
 +	const char *path_ptr;
 +	wordexp_t we;
 +	size_t i;
 +
 +	if (depth >= CF_MAX_DEPTH)
 +	{
 +		ERROR ("configfile: Not including `%s' because the maximum "
 +				"nesting depth has been reached.", path);
 +		return (NULL);
 +	}
 +
 +	status = wordexp (path, &we, WRDE_NOCMD);
 +	if (status != 0)
 +	{
 +		ERROR ("configfile: wordexp (%s) failed.", path);
 +		return (NULL);
 +	}
 +
 +	root = (oconfig_item_t *) malloc (sizeof (oconfig_item_t));
 +	if (root == NULL)
 +	{
 +		ERROR ("configfile: malloc failed.");
 +		return (NULL);
 +	}
 +	memset (root, '\0', sizeof (oconfig_item_t));
 +
 +	/* wordexp() might return a sorted list already. That's not
 +	 * documented though, so let's make sure we get what we want. */
 +	qsort ((void *) we.we_wordv, we.we_wordc, sizeof (*we.we_wordv),
 +			cf_compare_string);
 +
 +	for (i = 0; i < we.we_wordc; i++)
 +	{
 +		oconfig_item_t *temp;
 +		struct stat statbuf;
 +
 +		path_ptr = we.we_wordv[i];
 +
 +		status = stat (path_ptr, &statbuf);
 +		if (status != 0)
 +		{
 +			char errbuf[1024];
 +			WARNING ("configfile: stat (%s) failed: %s",
 +					path_ptr,
 +					sstrerror (errno, errbuf, sizeof (errbuf)));
 +			continue;
 +		}
 +
 +		if (S_ISREG (statbuf.st_mode))
 +			temp = cf_read_file (path_ptr, pattern, depth);
 +		else if (S_ISDIR (statbuf.st_mode))
 +			temp = cf_read_dir (path_ptr, pattern, depth);
 +		else
 +		{
 +			WARNING ("configfile: %s is neither a file nor a "
 +					"directory.", path);
 +			continue;
 +		}
 +
 +		if (temp == NULL) {
 +			oconfig_free (root);
 +			return (NULL);
 +		}
 +
 +		cf_ci_append_children (root, temp);
 +		sfree (temp->children);
 +		sfree (temp);
 +	}
 +
 +	wordfree (&we);
 +
 +	return (root);
 +} /* oconfig_item_t *cf_read_generic */
 +/* #endif HAVE_WORDEXP_H */
 +
 +#else /* if !HAVE_WORDEXP_H */
 +static oconfig_item_t *cf_read_generic (const char *path,
 +		const char *pattern, int depth)
 +{
 +	struct stat statbuf;
 +	int status;
 +
 +	if (depth >= CF_MAX_DEPTH)
 +	{
 +		ERROR ("configfile: Not including `%s' because the maximum "
 +				"nesting depth has been reached.", path);
 +		return (NULL);
 +	}
 +
 +	status = stat (path, &statbuf);
 +	if (status != 0)
 +	{
 +		char errbuf[1024];
 +		ERROR ("configfile: stat (%s) failed: %s",
 +				path,
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (NULL);
 +	}
 +
 +	if (S_ISREG (statbuf.st_mode))
 +		return (cf_read_file (path, pattern, depth));
 +	else if (S_ISDIR (statbuf.st_mode))
 +		return (cf_read_dir (path, pattern, depth));
 +
 +	ERROR ("configfile: %s is neither a file nor a directory.", path);
 +	return (NULL);
 +} /* oconfig_item_t *cf_read_generic */
 +#endif /* !HAVE_WORDEXP_H */
 +
 +/* 
 + * Public functions
 + */
 +int global_option_set (const char *option, const char *value)
 +{
 +	int i;
 +
 +	DEBUG ("option = %s; value = %s;", option, value);
 +
 +	for (i = 0; i < cf_global_options_num; i++)
 +		if (strcasecmp (cf_global_options[i].key, option) == 0)
 +			break;
 +
 +	if (i >= cf_global_options_num)
 +		return (-1);
 +
 +	if (strcasecmp (option, "PIDFile") == 0 && pidfile_from_cli == 1)
 +	{
 +		DEBUG ("Configfile: Ignoring `PIDFILE' option because "
 +			"command-line option `-P' take precedence.");
 +		return (0);
 +	}
 +
 +	sfree (cf_global_options[i].value);
 +
 +	if (value != NULL)
 +		cf_global_options[i].value = strdup (value);
 +	else
 +		cf_global_options[i].value = NULL;
 +
 +	return (0);
 +}
 +
 +const char *global_option_get (const char *option)
 +{
 +	int i;
 +
 +	for (i = 0; i < cf_global_options_num; i++)
 +		if (strcasecmp (cf_global_options[i].key, option) == 0)
 +			break;
 +
 +	if (i >= cf_global_options_num)
 +		return (NULL);
 +	
 +	return ((cf_global_options[i].value != NULL)
 +			? cf_global_options[i].value
 +			: cf_global_options[i].def);
 +} /* char *global_option_get */
 +
 +long global_option_get_long (const char *option, long default_value)
 +{
 +	const char *str;
 +	long value;
 +
 +	str = global_option_get (option);
 +	if (NULL == str)
 +		return (default_value);
 +
 +	errno = 0;
 +	value = strtol (str, /* endptr = */ NULL, /* base = */ 0);
 +	if (errno != 0)
 +		return (default_value);
 +
 +	return (value);
 +} /* char *global_option_get_long */
 +
 +cdtime_t global_option_get_time (const char *name, cdtime_t def) /* {{{ */
 +{
 +	char const *optstr;
 +	char *endptr = NULL;
 +	double v;
 +
 +	optstr = global_option_get (name);
 +	if (optstr == NULL)
 +		return (def);
 +
 +	errno = 0;
 +	v = strtod (optstr, &endptr);
 +	if ((endptr == NULL) || (*endptr != 0) || (errno != 0))
 +		return (def);
 +	else if (v <= 0.0)
 +		return (def);
 +
 +	return (DOUBLE_TO_CDTIME_T (v));
 +} /* }}} cdtime_t global_option_get_time */
 +
 +cdtime_t cf_get_default_interval (void)
 +{
 +	return (global_option_get_time ("Interval",
 +			       DOUBLE_TO_CDTIME_T (COLLECTD_DEFAULT_INTERVAL)));
 +}
 +
 +void cf_unregister (const char *type)
 +{
 +	cf_callback_t *this, *prev;
 +
 +	for (prev = NULL, this = first_callback;
 +			this != NULL;
 +			prev = this, this = this->next)
 +		if (strcasecmp (this->type, type) == 0)
 +		{
 +			if (prev == NULL)
 +				first_callback = this->next;
 +			else
 +				prev->next = this->next;
 +
 +			free (this);
 +			break;
 +		}
 +} /* void cf_unregister */
 +
 +void cf_unregister_complex (const char *type)
 +{
 +	cf_complex_callback_t *this, *prev;
 +
 +	for (prev = NULL, this = complex_callback_head;
 +			this != NULL;
 +			prev = this, this = this->next)
 +		if (strcasecmp (this->type, type) == 0)
 +		{
 +			if (prev == NULL)
 +				complex_callback_head = this->next;
 +			else
 +				prev->next = this->next;
 +
 +			sfree (this->type);
 +			sfree (this);
 +			break;
 +		}
 +} /* void cf_unregister */
 +
 +void cf_register (const char *type,
 +		int (*callback) (const char *, const char *),
 +		const char **keys, int keys_num)
 +{
 +	cf_callback_t *cf_cb;
 +
 +	/* Remove this module from the list, if it already exists */
 +	cf_unregister (type);
 +
 +	/* This pointer will be free'd in `cf_unregister' */
 +	if ((cf_cb = (cf_callback_t *) malloc (sizeof (cf_callback_t))) == NULL)
 +		return;
 +
 +	cf_cb->type     = type;
 +	cf_cb->callback = callback;
 +	cf_cb->keys     = keys;
 +	cf_cb->keys_num = keys_num;
 +	cf_cb->ctx      = plugin_get_ctx ();
 +
 +	cf_cb->next = first_callback;
 +	first_callback = cf_cb;
 +} /* void cf_register */
 +
 +int cf_register_complex (const char *type, int (*callback) (oconfig_item_t *))
 +{
 +	cf_complex_callback_t *new;
 +
 +	new = (cf_complex_callback_t *) malloc (sizeof (cf_complex_callback_t));
 +	if (new == NULL)
 +		return (-1);
 +
 +	new->type = strdup (type);
 +	if (new->type == NULL)
 +	{
 +		sfree (new);
 +		return (-1);
 +	}
 +
 +	new->callback = callback;
 +	new->next = NULL;
 +
 +	new->ctx = plugin_get_ctx ();
 +
 +	if (complex_callback_head == NULL)
 +	{
 +		complex_callback_head = new;
 +	}
 +	else
 +	{
 +		cf_complex_callback_t *last = complex_callback_head;
 +		while (last->next != NULL)
 +			last = last->next;
 +		last->next = new;
 +	}
 +
 +	return (0);
 +} /* int cf_register_complex */
 +
 +int cf_read (char *filename)
 +{
 +	oconfig_item_t *conf;
 +	int i;
 +
 +	conf = cf_read_generic (filename, /* pattern = */ NULL, /* depth = */ 0);
 +	if (conf == NULL)
 +	{
 +		ERROR ("Unable to read config file %s.", filename);
 +		return (-1);
 +	}
 +	else if (conf->children_num == 0)
 +	{
 +		ERROR ("Configuration file %s is empty.", filename);
 +		oconfig_free (conf);
 +		return (-1);
 +	}
 +
 +	for (i = 0; i < conf->children_num; i++)
 +	{
 +		if (conf->children[i].children == NULL)
 +			dispatch_value (conf->children + i);
 +		else
 +			dispatch_block (conf->children + i);
 +	}
 +
 +	oconfig_free (conf);
 +
 +	/* Read the default types.db if no `TypesDB' option was given. */
 +	if (cf_default_typesdb)
 +		read_types_list (PKGDATADIR"/types.db");
 +
 +	return (0);
 +} /* int cf_read */
 +
 +/* Assures the config option is a string, duplicates it and returns the copy in
 + * "ret_string". If necessary "*ret_string" is freed first. Returns zero upon
 + * success. */
 +int cf_util_get_string (const oconfig_item_t *ci, char **ret_string) /* {{{ */
 +{
 +	char *string;
 +
 +	if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
 +	{
 +		ERROR ("cf_util_get_string: The %s option requires "
 +				"exactly one string argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	string = strdup (ci->values[0].value.string);
 +	if (string == NULL)
 +		return (-1);
 +
 +	if (*ret_string != NULL)
 +		sfree (*ret_string);
 +	*ret_string = string;
 +
 +	return (0);
 +} /* }}} int cf_util_get_string */
 +
 +/* Assures the config option is a string and copies it to the provided buffer.
 + * Assures null-termination. */
 +int cf_util_get_string_buffer (const oconfig_item_t *ci, char *buffer, /* {{{ */
 +		size_t buffer_size)
 +{
 +	if ((ci == NULL) || (buffer == NULL) || (buffer_size < 1))
 +		return (EINVAL);
 +
 +	if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
 +	{
 +		ERROR ("cf_util_get_string_buffer: The %s option requires "
 +				"exactly one string argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	strncpy (buffer, ci->values[0].value.string, buffer_size);
 +	buffer[buffer_size - 1] = 0;
 +
 +	return (0);
 +} /* }}} int cf_util_get_string_buffer */
 +
 +/* Assures the config option is a number and returns it as an int. */
 +int cf_util_get_int (const oconfig_item_t *ci, int *ret_value) /* {{{ */
 +{
 +	if ((ci == NULL) || (ret_value == NULL))
 +		return (EINVAL);
 +
 +	if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
 +	{
 +		ERROR ("cf_util_get_int: The %s option requires "
 +				"exactly one numeric argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	*ret_value = (int) ci->values[0].value.number;
 +
 +	return (0);
 +} /* }}} int cf_util_get_int */
 +
 +int cf_util_get_double (const oconfig_item_t *ci, double *ret_value) /* {{{ */
 +{
 +	if ((ci == NULL) || (ret_value == NULL))
 +		return (EINVAL);
 +
 +	if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
 +	{
 +		ERROR ("cf_util_get_double: The %s option requires "
 +				"exactly one numeric argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	*ret_value = ci->values[0].value.number;
 +
 +	return (0);
 +} /* }}} int cf_util_get_double */
 +
 +int cf_util_get_boolean (const oconfig_item_t *ci, _Bool *ret_bool) /* {{{ */
 +{
 +	if ((ci == NULL) || (ret_bool == NULL))
 +		return (EINVAL);
 +
 +	if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
 +	{
 +		ERROR ("cf_util_get_boolean: The %s option requires "
 +				"exactly one boolean argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	*ret_bool = ci->values[0].value.boolean ? 1 : 0;
 +
 +	return (0);
 +} /* }}} int cf_util_get_boolean */
 +
 +int cf_util_get_flag (const oconfig_item_t *ci, /* {{{ */
 +		unsigned int *ret_value, unsigned int flag)
 +{
 +	int status;
 +	_Bool b;
 +
 +	if (ret_value == NULL)
 +		return (EINVAL);
 +
 +	b = 0;
 +	status = cf_util_get_boolean (ci, &b);
 +	if (status != 0)
 +		return (status);
 +
 +	if (b)
 +	{
 +		*ret_value |= flag;
 +	}
 +	else
 +	{
 +		*ret_value &= ~flag;
 +	}
 +
 +	return (0);
 +} /* }}} int cf_util_get_flag */
 +
 +/* Assures that the config option is a string or a number if the correct range
 + * of 1-65535. The string is then converted to a port number using
 + * `service_name_to_port_number' and returned.
 + * Returns the port number in the range [1-65535] or less than zero upon
 + * failure. */
 +int cf_util_get_port_number (const oconfig_item_t *ci) /* {{{ */
 +{
 +	int tmp;
 +
 +	if ((ci->values_num != 1)
 +			|| ((ci->values[0].type != OCONFIG_TYPE_STRING)
 +				&& (ci->values[0].type != OCONFIG_TYPE_NUMBER)))
 +	{
 +		ERROR ("cf_util_get_port_number: The \"%s\" option requires "
 +				"exactly one string argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	if (ci->values[0].type == OCONFIG_TYPE_STRING)
 +		return (service_name_to_port_number (ci->values[0].value.string));
 +
 +	assert (ci->values[0].type == OCONFIG_TYPE_NUMBER);
 +	tmp = (int) (ci->values[0].value.number + 0.5);
 +	if ((tmp < 1) || (tmp > 65535))
 +	{
 +		ERROR ("cf_util_get_port_number: The \"%s\" option requires "
 +				"a service name or a port number. The number "
 +				"you specified, %i, is not in the valid "
 +				"range of 1-65535.",
 +				ci->key, tmp);
 +		return (-1);
 +	}
 +
 +	return (tmp);
 +} /* }}} int cf_util_get_port_number */
 +
 +int cf_util_get_service (const oconfig_item_t *ci, char **ret_string) /* {{{ */
 +{
 +	int port;
 +	char *service;
 +	int status;
 +
 +	if (ci->values_num != 1)
 +	{
 +		ERROR ("cf_util_get_service: The %s option requires exactly "
 +				"one argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	if (ci->values[0].type == OCONFIG_TYPE_STRING)
 +		return (cf_util_get_string (ci, ret_string));
 +	if (ci->values[0].type != OCONFIG_TYPE_NUMBER)
 +	{
 +		ERROR ("cf_util_get_service: The %s option requires "
 +				"exactly one string or numeric argument.",
 +				ci->key);
 +	}
 +
 +	port = 0;
 +	status = cf_util_get_int (ci, &port);
 +	if (status != 0)
 +		return (status);
 +	else if ((port < 1) || (port > 65535))
 +	{
 +		ERROR ("cf_util_get_service: The port number given "
 +				"for the %s option is out of "
 +				"range (%i).", ci->key, port);
 +		return (-1);
 +	}
 +
 +	service = malloc (6);
 +	if (service == NULL)
 +	{
 +		ERROR ("cf_util_get_service: Out of memory.");
 +		return (-1);
 +	}
 +	ssnprintf (service, 6, "%i", port);
 +
 +	sfree (*ret_string);
 +	*ret_string = service;
 +
 +	return (0);
 +} /* }}} int cf_util_get_service */
 +
 +int cf_util_get_cdtime (const oconfig_item_t *ci, cdtime_t *ret_value) /* {{{ */
 +{
 +	if ((ci == NULL) || (ret_value == NULL))
 +		return (EINVAL);
 +
 +	if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
 +	{
 +		ERROR ("cf_util_get_cdtime: The %s option requires "
 +				"exactly one numeric argument.", ci->key);
 +		return (-1);
 +	}
 +
 +	if (ci->values[0].value.number < 0.0)
 +	{
 +		ERROR ("cf_util_get_cdtime: The numeric argument of the %s "
 +				"option must not be negative.", ci->key);
 +		return (-1);
 +	}
 +
 +	*ret_value = DOUBLE_TO_CDTIME_T (ci->values[0].value.number);
 +
 +	return (0);
 +} /* }}} int cf_util_get_cdtime */
 +