From: Florian Forster <octo@collectd.org>
Date: Thu, 18 Jun 2015 14:52:09 +0000 (+0200)
Subject: Merge branch 'collectd-5.4' into collectd-5.5
X-Git-Tag: collectd-5.5.1~98
X-Git-Url: https://git.octo.it/?p=collectd.git;a=commitdiff_plain;h=0003c4d3c184f0f437499d6073cd023dc7b659c2

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

0003c4d3c184f0f437499d6073cd023dc7b659c2
diff --cc src/Makefile.am
index 9839c03a,62f98751..c718621e
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@@ -953,8 -1094,10 +953,8 @@@ if BUILD_PLUGIN_STATS
  pkglib_LTLIBRARIES += statsd.la
  statsd_la_SOURCES = statsd.c \
                      utils_latency.h utils_latency.c
 -statsd_la_LDFLAGS = -module -avoid-version
 +statsd_la_LDFLAGS = $(PLUGIN_LDFLAGS)
- statsd_la_LIBADD = -lpthread
+ statsd_la_LIBADD = -lpthread -lm
 -collectd_LDADD += "-dlopen" statsd.la
 -collectd_DEPENDENCIES += statsd.la
  endif
  
  if BUILD_PLUGIN_SWAP
diff --cc src/daemon/collectd.c
index a708665d,00000000..46e13b3f
mode 100644,000000..100644
--- a/src/daemon/collectd.c
+++ b/src/daemon/collectd.c
@@@ -1,718 -1,0 +1,719 @@@
 +/**
 + * collectd - src/collectd.c
 + * Copyright (C) 2005-2007  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>
 + *   Alvaro Barcellos <alvaro.barcellos at gmail.com>
 + **/
 +
 +#include "collectd.h"
 +#include "common.h"
 +
 +#include "plugin.h"
 +#include "configfile.h"
 +
 +#include <sys/types.h>
 +#include <sys/socket.h>
 +#include <sys/un.h>
 +#include <netdb.h>
 +
 +#include <pthread.h>
 +
 +#if HAVE_LOCALE_H
 +# include <locale.h>
 +#endif
 +
 +#if HAVE_STATGRAB_H
 +# include <statgrab.h>
 +#endif
 +
 +#ifndef COLLECTD_LOCALE
 +# define COLLECTD_LOCALE "C"
 +#endif
 +
 +/*
 + * Global variables
 + */
 +char hostname_g[DATA_MAX_NAME_LEN];
 +cdtime_t interval_g;
 +int  pidfile_from_cli = 0;
 +int  timeout_g;
 +#if HAVE_LIBKSTAT
 +kstat_ctl_t *kc;
 +#endif /* HAVE_LIBKSTAT */
 +
 +static int loop = 0;
 +
 +static void *do_flush (void __attribute__((unused)) *arg)
 +{
 +	INFO ("Flushing all data.");
 +	plugin_flush (/* plugin = */ NULL,
 +			/* timeout = */ 0,
 +			/* ident = */ NULL);
 +	INFO ("Finished flushing all data.");
 +	pthread_exit (NULL);
 +	return NULL;
 +}
 +
 +static void sig_int_handler (int __attribute__((unused)) signal)
 +{
 +	loop++;
 +}
 +
 +static void sig_term_handler (int __attribute__((unused)) signal)
 +{
 +	loop++;
 +}
 +
 +static void sig_usr1_handler (int __attribute__((unused)) signal)
 +{
 +	pthread_t      thread;
 +	pthread_attr_t attr;
 +
 +	/* flushing the data might take a while,
 +	 * so it should be done asynchronously */
 +	pthread_attr_init (&attr);
 +	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
 +	pthread_create (&thread, &attr, do_flush, NULL);
 +	pthread_attr_destroy (&attr);
 +}
 +
 +static int init_hostname (void)
 +{
 +	const char *str;
 +
 +	struct addrinfo  ai_hints;
 +	struct addrinfo *ai_list;
 +	struct addrinfo *ai_ptr;
 +	int status;
 +
 +	str = global_option_get ("Hostname");
 +	if (str != NULL)
 +	{
 +		sstrncpy (hostname_g, str, sizeof (hostname_g));
 +		return (0);
 +	}
 +
 +	if (gethostname (hostname_g, sizeof (hostname_g)) != 0)
 +	{
 +		fprintf (stderr, "`gethostname' failed and no "
 +				"hostname was configured.\n");
 +		return (-1);
 +	}
 +
 +	str = global_option_get ("FQDNLookup");
 +	if (IS_FALSE (str))
 +		return (0);
 +
 +	memset (&ai_hints, '\0', sizeof (ai_hints));
 +	ai_hints.ai_flags = AI_CANONNAME;
 +
 +	status = getaddrinfo (hostname_g, NULL, &ai_hints, &ai_list);
 +	if (status != 0)
 +	{
 +		ERROR ("Looking up \"%s\" failed. You have set the "
 +				"\"FQDNLookup\" option, but I cannot resolve "
 +				"my hostname to a fully qualified domain "
 +				"name. Please fix the network "
 +				"configuration.", hostname_g);
 +		return (-1);
 +	}
 +
 +	for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
 +	{
 +		if (ai_ptr->ai_canonname == NULL)
 +			continue;
 +
 +		sstrncpy (hostname_g, ai_ptr->ai_canonname, sizeof (hostname_g));
 +		break;
 +	}
 +
 +	freeaddrinfo (ai_list);
 +	return (0);
 +} /* int init_hostname */
 +
 +static int init_global_variables (void)
 +{
 +	char const *str;
 +
 +	interval_g = cf_get_default_interval ();
 +	assert (interval_g > 0);
 +	DEBUG ("interval_g = %.3f;", CDTIME_T_TO_DOUBLE (interval_g));
 +
 +	str = global_option_get ("Timeout");
 +	if (str == NULL)
 +		str = "2";
 +	timeout_g = atoi (str);
 +	if (timeout_g <= 1)
 +	{
 +		fprintf (stderr, "Cannot set the timeout to a correct value.\n"
 +				"Please check your settings.\n");
 +		return (-1);
 +	}
 +	DEBUG ("timeout_g = %i;", timeout_g);
 +
 +	if (init_hostname () != 0)
 +		return (-1);
 +	DEBUG ("hostname_g = %s;", hostname_g);
 +
 +	return (0);
 +} /* int init_global_variables */
 +
 +static int change_basedir (const char *orig_dir)
 +{
 +	char *dir;
 +	size_t dirlen;
 +	int status;
 +
 +	dir = strdup (orig_dir);
 +	if (dir == NULL)
 +	{
 +		char errbuf[1024];
 +		ERROR ("strdup failed: %s",
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (-1);
 +	}
 +
 +	dirlen = strlen (dir);
 +	while ((dirlen > 0) && (dir[dirlen - 1] == '/'))
 +		dir[--dirlen] = '\0';
 +
 +	if (dirlen <= 0)
 +		return (-1);
 +
 +	status = chdir (dir);
 +	if (status == 0)
 +	{
 +		free (dir);
 +		return (0);
 +	}
 +	else if (errno != ENOENT)
 +	{
 +		char errbuf[1024];
 +		ERROR ("change_basedir: chdir (%s): %s", dir,
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		free (dir);
 +		return (-1);
 +	}
 +
 +	status = mkdir (dir, S_IRWXU | S_IRWXG | S_IRWXO);
 +	if (status != 0)
 +	{
 +		char errbuf[1024];
 +		ERROR ("change_basedir: mkdir (%s): %s", dir,
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		free (dir);
 +		return (-1);
 +	}
 +
 +	status = chdir (dir);
 +	if (status != 0)
 +	{
 +		char errbuf[1024];
 +		ERROR ("change_basedir: chdir (%s): %s", dir,
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		free (dir);
 +		return (-1);
 +	}
 +
 +	free (dir);
 +	return (0);
 +} /* static int change_basedir (char *dir) */
 +
 +#if HAVE_LIBKSTAT
 +static void update_kstat (void)
 +{
 +	if (kc == NULL)
 +	{
 +		if ((kc = kstat_open ()) == NULL)
 +			ERROR ("Unable to open kstat control structure");
 +	}
 +	else
 +	{
 +		kid_t kid;
 +		kid = kstat_chain_update (kc);
 +		if (kid > 0)
 +		{
 +			INFO ("kstat chain has been updated");
 +			plugin_init_all ();
 +		}
 +		else if (kid < 0)
 +			ERROR ("kstat chain update failed");
 +		/* else: everything works as expected */
 +	}
 +
 +	return;
 +} /* static void update_kstat (void) */
 +#endif /* HAVE_LIBKSTAT */
 +
 +/* TODO
 + * Remove all settings but `-f' and `-C'
 + */
 +static void exit_usage (int status)
 +{
 +	printf ("Usage: "PACKAGE_NAME" [OPTIONS]\n\n"
 +
 +			"Available options:\n"
 +			"  General:\n"
 +			"    -C <file>       Configuration file.\n"
 +			"                    Default: "CONFIGFILE"\n"
 +			"    -t              Test config and exit.\n"
 +			"    -T              Test plugin read and exit.\n"
 +			"    -P <file>       PID-file.\n"
 +			"                    Default: "PIDFILE"\n"
 +#if COLLECT_DAEMON
 +			"    -f              Don't fork to the background.\n"
 +#endif
 +			"    -h              Display help (this message)\n"
 +			"\nBuiltin defaults:\n"
 +			"  Config file       "CONFIGFILE"\n"
 +			"  PID file          "PIDFILE"\n"
 +			"  Plugin directory  "PLUGINDIR"\n"
 +			"  Data directory    "PKGLOCALSTATEDIR"\n"
 +			"\n"PACKAGE_NAME" "PACKAGE_VERSION", http://collectd.org/\n"
 +			"by Florian octo Forster <octo@collectd.org>\n"
 +			"for contributions see `AUTHORS'\n");
 +	exit (status);
 +} /* static void exit_usage (int status) */
 +
 +static int do_init (void)
 +{
 +#if HAVE_SETLOCALE
 +	if (setlocale (LC_NUMERIC, COLLECTD_LOCALE) == NULL)
 +		WARNING ("setlocale (\"%s\") failed.", COLLECTD_LOCALE);
 +#endif
 +
 +#if HAVE_LIBKSTAT
 +	kc = NULL;
 +	update_kstat ();
 +#endif
 +
 +#if HAVE_LIBSTATGRAB
 +	if (sg_init (
 +# if HAVE_LIBSTATGRAB_0_90
 +		    0
 +# endif
 +		    ))
 +	{
 +		ERROR ("sg_init: %s", sg_str_error (sg_get_error ()));
 +		return (-1);
 +	}
 +
 +	if (sg_drop_privileges ())
 +	{
 +		ERROR ("sg_drop_privileges: %s", sg_str_error (sg_get_error ()));
 +		return (-1);
 +	}
 +#endif
 +
 +	plugin_init_all ();
 +
 +	return (0);
 +} /* int do_init () */
 +
 +
 +static int do_loop (void)
 +{
 +	cdtime_t interval = cf_get_default_interval ();
 +	cdtime_t wait_until;
 +
 +	wait_until = cdtime () + interval;
 +
 +	while (loop == 0)
 +	{
 +		struct timespec ts_wait = { 0, 0 };
 +		cdtime_t now;
 +
 +#if HAVE_LIBKSTAT
 +		update_kstat ();
 +#endif
 +
 +		/* Issue all plugins */
 +		plugin_read_all ();
 +
 +		now = cdtime ();
 +		if (now >= wait_until)
 +		{
 +			WARNING ("Not sleeping because the next interval is "
 +					"%.3f seconds in the past!",
 +					CDTIME_T_TO_DOUBLE (now - wait_until));
 +			wait_until = now + interval;
 +			continue;
 +		}
 +
 +		CDTIME_T_TO_TIMESPEC (wait_until - now, &ts_wait);
 +		wait_until = wait_until + interval;
 +
 +		while ((loop == 0) && (nanosleep (&ts_wait, &ts_wait) != 0))
 +		{
 +			if (errno != EINTR)
 +			{
 +				char errbuf[1024];
 +				ERROR ("nanosleep failed: %s",
 +						sstrerror (errno, errbuf,
 +							sizeof (errbuf)));
 +				return (-1);
 +			}
 +		}
 +	} /* while (loop == 0) */
 +
 +	return (0);
 +} /* int do_loop */
 +
 +static int do_shutdown (void)
 +{
 +	plugin_shutdown_all ();
 +	return (0);
 +} /* int do_shutdown */
 +
 +#if COLLECT_DAEMON
 +static int pidfile_create (void)
 +{
 +	FILE *fh;
 +	const char *file = global_option_get ("PIDFile");
 +
 +	if ((fh = fopen (file, "w")) == NULL)
 +	{
 +		char errbuf[1024];
 +		ERROR ("fopen (%s): %s", file,
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (1);
 +	}
 +
 +	fprintf (fh, "%i\n", (int) getpid ());
 +	fclose(fh);
 +
 +	return (0);
 +} /* static int pidfile_create (const char *file) */
 +
 +static int pidfile_remove (void)
 +{
 +	const char *file = global_option_get ("PIDFile");
++	if (file == NULL)
++		return 0;
 +
- 	DEBUG ("unlink (%s)", (file != NULL) ? file : "<null>");
 +	return (unlink (file));
 +} /* static int pidfile_remove (const char *file) */
 +#endif /* COLLECT_DAEMON */
 +
 +#ifdef KERNEL_LINUX
 +int notify_upstart (void)
 +{
 +    const char  *upstart_job = getenv("UPSTART_JOB");
 +
 +    if (upstart_job == NULL)
 +        return 0;
 +
 +    if (strcmp(upstart_job, "collectd") != 0)
 +        return 0;
 +
 +    WARNING ("supervised by upstart, will stop to signal readyness");
 +    raise(SIGSTOP);
 +    unsetenv("UPSTART_JOB");
 +
 +    return 1;
 +}
 +
 +int notify_systemd (void)
 +{
 +    int                  fd = -1;
 +    const char          *notifysocket = getenv("NOTIFY_SOCKET");
 +    struct sockaddr_un   su;
 +    struct iovec         iov;
 +    struct msghdr        hdr;
 +
 +    if (notifysocket == NULL)
 +        return 0;
 +
 +    if ((strchr("@/", notifysocket[0])) == NULL ||
 +        strlen(notifysocket) < 2)
 +        return 0;
 +
 +    WARNING ("supervised by systemd, will signal readyness");
 +    if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) {
 +        WARNING ("cannot contact systemd socket %s", notifysocket);
 +        return 0;
 +    }
 +
 +    bzero(&su, sizeof(su));
 +    su.sun_family = AF_UNIX;
 +    sstrncpy (su.sun_path, notifysocket, sizeof(su.sun_path));
 +
 +    if (notifysocket[0] == '@')
 +        su.sun_path[0] = 0;
 +
 +    bzero(&iov, sizeof(iov));
 +    iov.iov_base = "READY=1";
 +    iov.iov_len = strlen("READY=1");
 +
 +    bzero(&hdr, sizeof(hdr));
 +    hdr.msg_name = &su;
 +    hdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) +
 +        strlen(notifysocket);
 +    hdr.msg_iov = &iov;
 +    hdr.msg_iovlen = 1;
 +
 +    unsetenv("NOTIFY_SOCKET");
 +    if (sendmsg(fd, &hdr, MSG_NOSIGNAL) < 0) {
 +        WARNING ("cannot send notification to systemd");
 +        close(fd);
 +        return 0;
 +    }
 +    close(fd);
 +    return 1;
 +}
 +#endif /* KERNEL_LINUX */
 +
 +int main (int argc, char **argv)
 +{
 +	struct sigaction sig_int_action;
 +	struct sigaction sig_term_action;
 +	struct sigaction sig_usr1_action;
 +	struct sigaction sig_pipe_action;
 +	char *configfile = CONFIGFILE;
 +	int test_config  = 0;
 +	int test_readall = 0;
 +	const char *basedir;
 +#if COLLECT_DAEMON
 +	struct sigaction sig_chld_action;
 +	pid_t pid;
 +	int daemonize    = 1;
 +#endif
 +	int exit_status = 0;
 +
 +	/* read options */
 +	while (1)
 +	{
 +		int c;
 +
 +		c = getopt (argc, argv, "htTC:"
 +#if COLLECT_DAEMON
 +				"fP:"
 +#endif
 +		);
 +
 +		if (c == -1)
 +			break;
 +
 +		switch (c)
 +		{
 +			case 'C':
 +				configfile = optarg;
 +				break;
 +			case 't':
 +				test_config = 1;
 +				break;
 +			case 'T':
 +				test_readall = 1;
 +				global_option_set ("ReadThreads", "-1");
 +#if COLLECT_DAEMON
 +				daemonize = 0;
 +#endif /* COLLECT_DAEMON */
 +				break;
 +#if COLLECT_DAEMON
 +			case 'P':
 +				global_option_set ("PIDFile", optarg);
 +				pidfile_from_cli = 1;
 +				break;
 +			case 'f':
 +				daemonize = 0;
 +				break;
 +#endif /* COLLECT_DAEMON */
 +			case 'h':
 +				exit_usage (0);
 +				break;
 +			default:
 +				exit_usage (1);
 +		} /* switch (c) */
 +	} /* while (1) */
 +
 +	if (optind < argc)
 +		exit_usage (1);
 +
 +	plugin_init_ctx ();
 +
 +	/*
 +	 * Read options from the config file, the environment and the command
 +	 * line (in that order, with later options overwriting previous ones in
 +	 * general).
 +	 * Also, this will automatically load modules.
 +	 */
 +	if (cf_read (configfile))
 +	{
 +		fprintf (stderr, "Error: Reading the config file failed!\n"
 +				"Read the syslog for details.\n");
 +		return (1);
 +	}
 +
 +	/*
 +	 * Change directory. We do this _after_ reading the config and loading
 +	 * modules to relative paths work as expected.
 +	 */
 +	if ((basedir = global_option_get ("BaseDir")) == NULL)
 +	{
 +		fprintf (stderr, "Don't have a basedir to use. This should not happen. Ever.");
 +		return (1);
 +	}
 +	else if (change_basedir (basedir))
 +	{
 +		fprintf (stderr, "Error: Unable to change to directory `%s'.\n", basedir);
 +		return (1);
 +	}
 +
 +	/*
 +	 * Set global variables or, if that failes, exit. We cannot run with
 +	 * them being uninitialized. If nothing is configured, then defaults
 +	 * are being used. So this means that the user has actually done
 +	 * something wrong.
 +	 */
 +	if (init_global_variables () != 0)
 +		return (1);
 +
 +	if (test_config)
 +		return (0);
 +
 +#if COLLECT_DAEMON
 +	/*
 +	 * fork off child
 +	 */
 +	memset (&sig_chld_action, '\0', sizeof (sig_chld_action));
 +	sig_chld_action.sa_handler = SIG_IGN;
 +	sigaction (SIGCHLD, &sig_chld_action, NULL);
 +
 +    /*
 +     * Only daemonize if we're not being supervised
 +     * by upstart or systemd (when using Linux).
 +     */
 +	if (daemonize
 +#ifdef KERNEL_LINUX
 +	    && notify_upstart() == 0 && notify_systemd() == 0
 +#endif
 +	)
 +	{
 +		if ((pid = fork ()) == -1)
 +		{
 +			/* error */
 +			char errbuf[1024];
 +			fprintf (stderr, "fork: %s",
 +					sstrerror (errno, errbuf,
 +						sizeof (errbuf)));
 +			return (1);
 +		}
 +		else if (pid != 0)
 +		{
 +			/* parent */
 +			/* printf ("Running (PID %i)\n", pid); */
 +			return (0);
 +		}
 +
 +		/* Detach from session */
 +		setsid ();
 +
 +		/* Write pidfile */
 +		if (pidfile_create ())
 +			exit (2);
 +
 +		/* close standard descriptors */
 +		close (2);
 +		close (1);
 +		close (0);
 +
 +		if (open ("/dev/null", O_RDWR) != 0)
 +		{
 +			ERROR ("Error: Could not connect `STDIN' to `/dev/null'");
 +			return (1);
 +		}
 +		if (dup (0) != 1)
 +		{
 +			ERROR ("Error: Could not connect `STDOUT' to `/dev/null'");
 +			return (1);
 +		}
 +		if (dup (0) != 2)
 +		{
 +			ERROR ("Error: Could not connect `STDERR' to `/dev/null'");
 +			return (1);
 +		}
 +	} /* if (daemonize) */
 +#endif /* COLLECT_DAEMON */
 +
 +	memset (&sig_pipe_action, '\0', sizeof (sig_pipe_action));
 +	sig_pipe_action.sa_handler = SIG_IGN;
 +	sigaction (SIGPIPE, &sig_pipe_action, NULL);
 +
 +	/*
 +	 * install signal handlers
 +	 */
 +	memset (&sig_int_action, '\0', sizeof (sig_int_action));
 +	sig_int_action.sa_handler = sig_int_handler;
 +	if (0 != sigaction (SIGINT, &sig_int_action, NULL)) {
 +		char errbuf[1024];
 +		ERROR ("Error: Failed to install a signal handler for signal INT: %s",
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (1);
 +	}
 +
 +	memset (&sig_term_action, '\0', sizeof (sig_term_action));
 +	sig_term_action.sa_handler = sig_term_handler;
 +	if (0 != sigaction (SIGTERM, &sig_term_action, NULL)) {
 +		char errbuf[1024];
 +		ERROR ("Error: Failed to install a signal handler for signal TERM: %s",
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (1);
 +	}
 +
 +	memset (&sig_usr1_action, '\0', sizeof (sig_usr1_action));
 +	sig_usr1_action.sa_handler = sig_usr1_handler;
 +	if (0 != sigaction (SIGUSR1, &sig_usr1_action, NULL)) {
 +		char errbuf[1024];
 +		ERROR ("Error: Failed to install a signal handler for signal USR1: %s",
 +				sstrerror (errno, errbuf, sizeof (errbuf)));
 +		return (1);
 +	}
 +
 +	/*
 +	 * run the actual loops
 +	 */
 +	do_init ();
 +
 +	if (test_readall)
 +	{
 +		if (plugin_read_all_once () != 0)
 +			exit_status = 1;
 +	}
 +	else
 +	{
 +		INFO ("Initialization complete, entering read-loop.");
 +		do_loop ();
 +	}
 +
 +	/* close syslog */
 +	INFO ("Exiting normally.");
 +
 +	do_shutdown ();
 +
 +#if COLLECT_DAEMON
 +	if (daemonize)
 +		pidfile_remove ();
 +#endif /* COLLECT_DAEMON */
 +
 +	return (exit_status);
 +} /* int main */
diff --cc src/daemon/configfile.c
index 765a23c4,00000000..8fc6f7d7
mode 100644,000000..100644
--- a/src/daemon/configfile.c
+++ b/src/daemon/configfile.c
@@@ -1,1365 -1,0 +1,1369 @@@
 +/**
 + * 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) (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 (oconfig_item_t *ci);
 +static int dispatch_value_plugindir (oconfig_item_t *ci);
 +static int dispatch_loadplugin (oconfig_item_t *ci);
 +static int dispatch_block_plugin (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},
 +	{"Plugin",     dispatch_block_plugin}
 +};
 +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;
 +
++	if (orig_key == NULL)
++		return (EINVAL);
++
 +	DEBUG ("type = %s, key = %s, value = %s",
 +			ESCAPE_NULL(type),
- 			ESCAPE_NULL(orig_key),
++			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 (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 (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 (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 (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);
 +	}
 +
++	if (filenames == NULL)
++		return (root);
++
 +	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 */
 +
diff --cc src/threshold.c
index 882f9553,4a840bb9..a8900db7
--- a/src/threshold.c
+++ b/src/threshold.c
@@@ -516,11 -626,7 +516,9 @@@ static int ut_report_state (const data_
            ": Value is no longer missing.");
      else
        status = ssnprintf (buf, bufsize,
 -          ": All data sources are within range again.");
 +          ": All data sources are within range again. "
 +          "Current value of \"%s\" is %f.",
 +          ds->ds[ds_index].name, values[ds_index]);
-     buf += status;
-     bufsize -= status;
    }
    else
    {
diff --cc src/virt.c
index b6fedf55,00000000..dff8f71d
mode 100644,000000..100644
--- a/src/virt.c
+++ b/src/virt.c
@@@ -1,1010 -1,0 +1,1016 @@@
 +/**
 + * collectd - src/virt.c
 + * Copyright (C) 2006-2008  Red Hat Inc.
 + *
 + * 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
 + *
 + * Authors:
 + *   Richard W.M. Jones <rjones@redhat.com>
 + **/
 +
 +#include "collectd.h"
 +#include "common.h"
 +#include "plugin.h"
 +#include "configfile.h"
 +#include "utils_ignorelist.h"
 +#include "utils_complain.h"
 +
 +#include <libvirt/libvirt.h>
 +#include <libvirt/virterror.h>
 +#include <libxml/parser.h>
 +#include <libxml/tree.h>
 +#include <libxml/xpath.h>
 +
 +/* Plugin name */
 +#define PLUGIN_NAME "virt"
 +
 +static const char *config_keys[] = {
 +    "Connection",
 +
 +    "RefreshInterval",
 +
 +    "Domain",
 +    "BlockDevice",
 +    "InterfaceDevice",
 +    "IgnoreSelected",
 +
 +    "HostnameFormat",
 +    "InterfaceFormat",
 +
 +    "PluginInstanceFormat",
 +
 +    NULL
 +};
 +#define NR_CONFIG_KEYS ((sizeof config_keys / sizeof config_keys[0]) - 1)
 +
 +/* Connection. */
 +static virConnectPtr conn = 0;
 +static char *conn_string = NULL;
 +static c_complain_t conn_complain = C_COMPLAIN_INIT_STATIC;
 +
 +/* Seconds between list refreshes, 0 disables completely. */
 +static int interval = 60;
 +
 +/* List of domains, if specified. */
 +static ignorelist_t *il_domains = NULL;
 +/* List of block devices, if specified. */
 +static ignorelist_t *il_block_devices = NULL;
 +/* List of network interface devices, if specified. */
 +static ignorelist_t *il_interface_devices = NULL;
 +
 +static int ignore_device_match (ignorelist_t *,
 +                                const char *domname, const char *devpath);
 +
 +/* Actual list of domains found on last refresh. */
 +static virDomainPtr *domains = NULL;
 +static int nr_domains = 0;
 +
 +static void free_domains (void);
 +static int add_domain (virDomainPtr dom);
 +
 +/* Actual list of block devices found on last refresh. */
 +struct block_device {
 +    virDomainPtr dom;           /* domain */
 +    char *path;                 /* name of block device */
 +};
 +
 +static struct block_device *block_devices = NULL;
 +static int nr_block_devices = 0;
 +
 +static void free_block_devices (void);
 +static int add_block_device (virDomainPtr dom, const char *path);
 +
 +/* Actual list of network interfaces found on last refresh. */
 +struct interface_device {
 +    virDomainPtr dom;           /* domain */
 +    char *path;                 /* name of interface device */
 +    char *address;              /* mac address of interface device */
 +    char *number;               /* interface device number */
 +};
 +
 +static struct interface_device *interface_devices = NULL;
 +static int nr_interface_devices = 0;
 +
 +static void free_interface_devices (void);
 +static int add_interface_device (virDomainPtr dom, const char *path, const char *address, unsigned int number);
 +
 +/* HostnameFormat. */
 +#define HF_MAX_FIELDS 3
 +
 +enum hf_field {
 +    hf_none = 0,
 +    hf_hostname,
 +    hf_name,
 +    hf_uuid
 +};
 +
 +static enum hf_field hostname_format[HF_MAX_FIELDS] =
 +    { hf_name };
 +
 +/* PluginInstanceFormat */
 +#define PLGINST_MAX_FIELDS 2
 +
 +enum plginst_field {
 +    plginst_none = 0,
 +    plginst_name,
 +    plginst_uuid
 +};
 +
 +static enum plginst_field plugin_instance_format[PLGINST_MAX_FIELDS] =
 +    { plginst_name };
 +
 +/* InterfaceFormat. */
 +enum if_field {
 +    if_address,
 +    if_name,
 +    if_number
 +};
 +
 +static enum if_field interface_format = if_name;
 +
 +/* Time that we last refreshed. */
 +static time_t last_refresh = (time_t) 0;
 +
 +static int refresh_lists (void);
 +
 +/* ERROR(...) macro for virterrors. */
 +#define VIRT_ERROR(conn,s) do {                 \
 +        virErrorPtr err;                        \
 +        err = (conn) ? virConnGetLastError ((conn)) : virGetLastError (); \
 +        if (err) ERROR ("%s: %s", (s), err->message);                   \
 +    } while(0)
 +
 +static void
 +init_value_list (value_list_t *vl, virDomainPtr dom)
 +{
 +    int i, n;
 +    const char *name;
 +    char uuid[VIR_UUID_STRING_BUFLEN];
 +
 +    sstrncpy (vl->plugin, PLUGIN_NAME, sizeof (vl->plugin));
 +
 +    vl->host[0] = '\0';
 +
 +    /* Construct the hostname field according to HostnameFormat. */
 +    for (i = 0; i < HF_MAX_FIELDS; ++i) {
 +        if (hostname_format[i] == hf_none)
 +            continue;
 +
 +        n = DATA_MAX_NAME_LEN - strlen (vl->host) - 2;
 +
 +        if (i > 0 && n >= 1) {
 +            strncat (vl->host, ":", 1);
 +            n--;
 +        }
 +
 +        switch (hostname_format[i]) {
 +        case hf_none: break;
 +        case hf_hostname:
 +            strncat (vl->host, hostname_g, n);
 +            break;
 +        case hf_name:
 +            name = virDomainGetName (dom);
 +            if (name)
 +                strncat (vl->host, name, n);
 +            break;
 +        case hf_uuid:
 +            if (virDomainGetUUIDString (dom, uuid) == 0)
 +                strncat (vl->host, uuid, n);
 +            break;
 +        }
 +    }
 +
 +    vl->host[sizeof (vl->host) - 1] = '\0';
 +
 +    /* Construct the plugin instance field according to PluginInstanceFormat. */
 +    for (i = 0; i < PLGINST_MAX_FIELDS; ++i) {
 +        if (plugin_instance_format[i] == plginst_none)
 +            continue;
 +
 +        n = sizeof(vl->plugin_instance) - strlen (vl->plugin_instance) - 2;
 +
 +        if (i > 0 && n >= 1) {
 +            strncat (vl->plugin_instance, ":", 1);
 +            n--;
 +        }
 +
 +        switch (plugin_instance_format[i]) {
 +        case plginst_none: break;
 +        case plginst_name:
 +            name = virDomainGetName (dom);
 +            if (name)
 +                strncat (vl->plugin_instance, name, n);
 +            break;
 +        case plginst_uuid:
 +            if (virDomainGetUUIDString (dom, uuid) == 0)
 +                strncat (vl->plugin_instance, uuid, n);
 +            break;
 +        }
 +    }
 +
 +    vl->plugin_instance[sizeof (vl->plugin_instance) - 1] = '\0';
 +
 +} /* void init_value_list */
 +
 +static void
 +memory_submit (gauge_t memory, virDomainPtr dom)
 +{
 +    value_t values[1];
 +    value_list_t vl = VALUE_LIST_INIT;
 +
 +    init_value_list (&vl, dom);
 +
 +    values[0].gauge = memory;
 +
 +    vl.values = values;
 +    vl.values_len = 1;
 +
 +    sstrncpy (vl.type, "memory", sizeof (vl.type));
 +    sstrncpy (vl.type_instance, "total", sizeof (vl.type_instance));
 +
 +    plugin_dispatch_values (&vl);
 +}
 +
 +static void
 +memory_stats_submit (gauge_t memory, virDomainPtr dom, int tag_index)
 +{
 +    static const char *tags[] = { "swap_in", "swap_out", "major_fault", "minor_fault",
 +                                    "unused", "available", "actual_balloon", "rss"};
 +
 +    value_t values[1];
 +    value_list_t vl = VALUE_LIST_INIT;
 +
 +    init_value_list (&vl, dom);
 +
 +    values[0].gauge = memory;
 +
 +    vl.values = values;
 +    vl.values_len = 1;
 +
 +    sstrncpy (vl.type, "memory", sizeof (vl.type));
 +    sstrncpy (vl.type_instance, tags[tag_index], sizeof (vl.type_instance));
 +
 +    plugin_dispatch_values (&vl);
 +}
 +
 +static void
 +cpu_submit (unsigned long long cpu_time,
 +            virDomainPtr dom, const char *type)
 +{
 +    value_t values[1];
 +    value_list_t vl = VALUE_LIST_INIT;
 +
 +    init_value_list (&vl, dom);
 +
 +    values[0].derive = cpu_time;
 +
 +    vl.values = values;
 +    vl.values_len = 1;
 +
 +    sstrncpy (vl.type, type, sizeof (vl.type));
 +
 +    plugin_dispatch_values (&vl);
 +}
 +
 +static void
 +vcpu_submit (derive_t cpu_time,
 +             virDomainPtr dom, int vcpu_nr, const char *type)
 +{
 +    value_t values[1];
 +    value_list_t vl = VALUE_LIST_INIT;
 +
 +    init_value_list (&vl, dom);
 +
 +    values[0].derive = cpu_time;
 +    vl.values = values;
 +    vl.values_len = 1;
 +
 +    sstrncpy (vl.type, type, sizeof (vl.type));
 +    ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%d", vcpu_nr);
 +
 +    plugin_dispatch_values (&vl);
 +}
 +
 +static void
 +submit_derive2 (const char *type, derive_t v0, derive_t v1,
 +             virDomainPtr dom, const char *devname)
 +{
 +    value_t values[2];
 +    value_list_t vl = VALUE_LIST_INIT;
 +
 +    init_value_list (&vl, dom);
 +
 +    values[0].derive = v0;
 +    values[1].derive = v1;
 +    vl.values = values;
 +    vl.values_len = 2;
 +
 +    sstrncpy (vl.type, type, sizeof (vl.type));
 +    sstrncpy (vl.type_instance, devname, sizeof (vl.type_instance));
 +
 +    plugin_dispatch_values (&vl);
 +} /* void submit_derive2 */
 +
 +static int
 +lv_init (void)
 +{
 +    if (virInitialize () != 0)
 +        return -1;
 +
 +	return 0;
 +}
 +
 +static int
 +lv_config (const char *key, const char *value)
 +{
 +    if (virInitialize () != 0)
 +        return 1;
 +
 +    if (il_domains == NULL)
 +        il_domains = ignorelist_create (1);
 +    if (il_block_devices == NULL)
 +        il_block_devices = ignorelist_create (1);
 +    if (il_interface_devices == NULL)
 +        il_interface_devices = ignorelist_create (1);
 +
 +    if (strcasecmp (key, "Connection") == 0) {
 +        char *tmp = strdup (value);
 +        if (tmp == NULL) {
 +            ERROR (PLUGIN_NAME " plugin: Connection strdup failed.");
 +            return 1;
 +        }
 +        sfree (conn_string);
 +        conn_string = tmp;
 +        return 0;
 +    }
 +
 +    if (strcasecmp (key, "RefreshInterval") == 0) {
 +        char *eptr = NULL;
 +        interval = strtol (value, &eptr, 10);
 +        if (eptr == NULL || *eptr != '\0') return 1;
 +        return 0;
 +    }
 +
 +    if (strcasecmp (key, "Domain") == 0) {
 +        if (ignorelist_add (il_domains, value)) return 1;
 +        return 0;
 +    }
 +    if (strcasecmp (key, "BlockDevice") == 0) {
 +        if (ignorelist_add (il_block_devices, value)) return 1;
 +        return 0;
 +    }
 +    if (strcasecmp (key, "InterfaceDevice") == 0) {
 +        if (ignorelist_add (il_interface_devices, value)) return 1;
 +        return 0;
 +    }
 +
 +    if (strcasecmp (key, "IgnoreSelected") == 0) {
 +        if (IS_TRUE (value))
 +        {
 +            ignorelist_set_invert (il_domains, 0);
 +            ignorelist_set_invert (il_block_devices, 0);
 +            ignorelist_set_invert (il_interface_devices, 0);
 +        }
 +        else
 +        {
 +            ignorelist_set_invert (il_domains, 1);
 +            ignorelist_set_invert (il_block_devices, 1);
 +            ignorelist_set_invert (il_interface_devices, 1);
 +        }
 +        return 0;
 +    }
 +
 +    if (strcasecmp (key, "HostnameFormat") == 0) {
 +        char *value_copy;
 +        char *fields[HF_MAX_FIELDS];
 +        int i, n;
 +
 +        value_copy = strdup (value);
 +        if (value_copy == NULL) {
 +            ERROR (PLUGIN_NAME " plugin: strdup failed.");
 +            return -1;
 +        }
 +
 +        n = strsplit (value_copy, fields, HF_MAX_FIELDS);
 +        if (n < 1) {
 +            sfree (value_copy);
 +            ERROR (PLUGIN_NAME " plugin: HostnameFormat: no fields");
 +            return -1;
 +        }
 +
 +        for (i = 0; i < n; ++i) {
 +            if (strcasecmp (fields[i], "hostname") == 0)
 +                hostname_format[i] = hf_hostname;
 +            else if (strcasecmp (fields[i], "name") == 0)
 +                hostname_format[i] = hf_name;
 +            else if (strcasecmp (fields[i], "uuid") == 0)
 +                hostname_format[i] = hf_uuid;
 +            else {
 +                sfree (value_copy);
 +                ERROR (PLUGIN_NAME " plugin: unknown HostnameFormat field: %s", fields[i]);
 +                return -1;
 +            }
 +        }
 +        sfree (value_copy);
 +
 +        for (i = n; i < HF_MAX_FIELDS; ++i)
 +            hostname_format[i] = hf_none;
 +
 +        return 0;
 +    }
 +
 +    if (strcasecmp (key, "PluginInstanceFormat") == 0) {
 +        char *value_copy;
 +        char *fields[PLGINST_MAX_FIELDS];
 +        int i, n;
 +
 +        value_copy = strdup (value);
 +        if (value_copy == NULL) {
 +            ERROR (PLUGIN_NAME " plugin: strdup failed.");
 +            return -1;
 +        }
 +
 +        n = strsplit (value_copy, fields, PLGINST_MAX_FIELDS);
 +        if (n < 1) {
 +            sfree (value_copy);
 +            ERROR (PLUGIN_NAME " plugin: PluginInstanceFormat: no fields");
 +            return -1;
 +        }
 +
 +        for (i = 0; i < n; ++i) {
 +            if (strcasecmp (fields[i], "name") == 0)
 +                plugin_instance_format[i] = plginst_name;
 +            else if (strcasecmp (fields[i], "uuid") == 0)
 +                plugin_instance_format[i] = plginst_uuid;
 +            else {
 +                sfree (value_copy);
 +                ERROR (PLUGIN_NAME " plugin: unknown HostnameFormat field: %s", fields[i]);
 +                return -1;
 +            }
 +        }
 +        sfree (value_copy);
 +
 +        for (i = n; i < PLGINST_MAX_FIELDS; ++i)
 +            plugin_instance_format[i] = plginst_none;
 +
 +        return 0;
 +    }
 +
 +    if (strcasecmp (key, "InterfaceFormat") == 0) {
 +        if (strcasecmp (value, "name") == 0)
 +            interface_format = if_name;
 +        else if (strcasecmp (value, "address") == 0)
 +            interface_format = if_address;
 +        else if (strcasecmp (value, "number") == 0)
 +            interface_format = if_number;
 +        else {
 +            ERROR (PLUGIN_NAME " plugin: unknown InterfaceFormat: %s", value);
 +            return -1;
 +        }
 +        return 0;
 +    }
 +
 +    /* Unrecognised option. */
 +    return -1;
 +}
 +
 +static int
 +lv_read (void)
 +{
 +    time_t t;
 +    int i;
 +
 +    if (conn == NULL) {
 +        /* `conn_string == NULL' is acceptable. */
 +        conn = virConnectOpenReadOnly (conn_string);
 +        if (conn == NULL) {
 +            c_complain (LOG_ERR, &conn_complain,
 +                    PLUGIN_NAME " plugin: Unable to connect: "
 +                    "virConnectOpenReadOnly failed.");
 +            return -1;
 +        }
 +    }
 +    c_release (LOG_NOTICE, &conn_complain,
 +            PLUGIN_NAME " plugin: Connection established.");
 +
 +    time (&t);
 +
 +    /* Need to refresh domain or device lists? */
 +    if ((last_refresh == (time_t) 0) ||
 +            ((interval > 0) && ((last_refresh + interval) <= t))) {
 +        if (refresh_lists () != 0) {
 +            if (conn != NULL)
 +                virConnectClose (conn);
 +            conn = NULL;
 +            return -1;
 +        }
 +        last_refresh = t;
 +    }
 +
 +#if 0
 +    for (i = 0; i < nr_domains; ++i)
 +        fprintf (stderr, "domain %s\n", virDomainGetName (domains[i]));
 +    for (i = 0; i < nr_block_devices; ++i)
 +        fprintf  (stderr, "block device %d %s:%s\n",
 +                  i, virDomainGetName (block_devices[i].dom),
 +                  block_devices[i].path);
 +    for (i = 0; i < nr_interface_devices; ++i)
 +        fprintf (stderr, "interface device %d %s:%s\n",
 +                 i, virDomainGetName (interface_devices[i].dom),
 +                 interface_devices[i].path);
 +#endif
 +
 +    /* Get CPU usage, memory, VCPU usage for each domain. */
 +    for (i = 0; i < nr_domains; ++i) {
 +        virDomainInfo info;
 +        virVcpuInfoPtr vinfo = NULL;
 +        virDomainMemoryStatPtr minfo = NULL;
 +        int status;
 +        int j;
 +
 +        status = virDomainGetInfo (domains[i], &info);
 +        if (status != 0)
 +        {
 +            ERROR (PLUGIN_NAME " plugin: virDomainGetInfo failed with status %i.",
 +                    status);
 +            continue;
 +        }
 +
 +        if (info.state != VIR_DOMAIN_RUNNING)
 +        {
 +            /* only gather stats for running domains */
 +            continue;
 +        }
 +
 +        cpu_submit (info.cpuTime, domains[i], "virt_cpu_total");
 +        memory_submit ((gauge_t) info.memory * 1024, domains[i]);
 +
 +        vinfo = malloc (info.nrVirtCpu * sizeof (vinfo[0]));
 +        if (vinfo == NULL) {
 +            ERROR (PLUGIN_NAME " plugin: malloc failed.");
 +            continue;
 +        }
 +
 +        status = virDomainGetVcpus (domains[i], vinfo, info.nrVirtCpu,
 +                /* cpu map = */ NULL, /* cpu map length = */ 0);
 +        if (status < 0)
 +        {
 +            ERROR (PLUGIN_NAME " plugin: virDomainGetVcpus failed with status %i.",
 +                    status);
 +            sfree (vinfo);
 +            continue;
 +        }
 +
 +        for (j = 0; j < info.nrVirtCpu; ++j)
 +            vcpu_submit (vinfo[j].cpuTime,
 +                    domains[i], vinfo[j].number, "virt_vcpu");
 +
 +        sfree (vinfo);
 +
 +        minfo = malloc (VIR_DOMAIN_MEMORY_STAT_NR * sizeof (virDomainMemoryStatStruct));
 +        if (minfo == NULL) {
 +            ERROR ("virt plugin: malloc failed.");
 +            continue;
 +        }
 +
 +        status =  virDomainMemoryStats (domains[i], minfo, VIR_DOMAIN_MEMORY_STAT_NR, 0);
 +
 +        if (status < 0) {
 +            ERROR ("virt plugin: virDomainMemoryStats failed with status %i.",
 +                    status);
 +            sfree (minfo);
 +            continue;
 +        }
 +
 +        for (j = 0; j < status; j++) {
 +            memory_stats_submit ((gauge_t) minfo[j].val * 1024, domains[i], minfo[j].tag);
 +        }
 +
 +        sfree (minfo);
 +    }
 +
 +
 +    /* Get block device stats for each domain. */
 +    for (i = 0; i < nr_block_devices; ++i) {
 +        struct _virDomainBlockStats stats;
 +
 +        if (virDomainBlockStats (block_devices[i].dom, block_devices[i].path,
 +                    &stats, sizeof stats) != 0)
 +            continue;
 +
 +        if ((stats.rd_req != -1) && (stats.wr_req != -1))
 +            submit_derive2 ("disk_ops",
 +                    (derive_t) stats.rd_req, (derive_t) stats.wr_req,
 +                    block_devices[i].dom, block_devices[i].path);
 +
 +        if ((stats.rd_bytes != -1) && (stats.wr_bytes != -1))
 +            submit_derive2 ("disk_octets",
 +                    (derive_t) stats.rd_bytes, (derive_t) stats.wr_bytes,
 +                    block_devices[i].dom, block_devices[i].path);
 +    } /* for (nr_block_devices) */
 +
 +    /* Get interface stats for each domain. */
 +    for (i = 0; i < nr_interface_devices; ++i) {
 +        struct _virDomainInterfaceStats stats;
 +        char *display_name = NULL;
 +
 +
 +        switch (interface_format) {
 +            case if_address:
 +                display_name = interface_devices[i].address;
 +                break;
 +            case if_number:
 +                display_name = interface_devices[i].number;
 +                break;
 +            case if_name:
 +            default:
 +                display_name = interface_devices[i].path;
 +        }
 +
 +        if (virDomainInterfaceStats (interface_devices[i].dom,
 +                    interface_devices[i].path,
 +                    &stats, sizeof stats) != 0)
 +            continue;
 +
 +	if ((stats.rx_bytes != -1) && (stats.tx_bytes != -1))
 +	    submit_derive2 ("if_octets",
 +		    (derive_t) stats.rx_bytes, (derive_t) stats.tx_bytes,
 +		    interface_devices[i].dom, display_name);
 +
 +	if ((stats.rx_packets != -1) && (stats.tx_packets != -1))
 +	    submit_derive2 ("if_packets",
 +		    (derive_t) stats.rx_packets, (derive_t) stats.tx_packets,
 +		    interface_devices[i].dom, display_name);
 +
 +	if ((stats.rx_errs != -1) && (stats.tx_errs != -1))
 +	    submit_derive2 ("if_errors",
 +		    (derive_t) stats.rx_errs, (derive_t) stats.tx_errs,
 +		    interface_devices[i].dom, display_name);
 +
 +	if ((stats.rx_drop != -1) && (stats.tx_drop != -1))
 +	    submit_derive2 ("if_dropped",
 +		    (derive_t) stats.rx_drop, (derive_t) stats.tx_drop,
 +		    interface_devices[i].dom, display_name);
 +    } /* for (nr_interface_devices) */
 +
 +    return 0;
 +}
 +
 +static int
 +refresh_lists (void)
 +{
 +    int n;
 +
 +    n = virConnectNumOfDomains (conn);
 +    if (n < 0) {
 +        VIRT_ERROR (conn, "reading number of domains");
 +        return -1;
 +    }
 +
 +    if (n > 0) {
 +        int i;
 +        int *domids;
 +
 +        /* Get list of domains. */
 +        domids = malloc (sizeof (int) * n);
 +        if (domids == 0) {
 +            ERROR (PLUGIN_NAME " plugin: malloc failed.");
 +            return -1;
 +        }
 +
 +        n = virConnectListDomains (conn, domids, n);
 +        if (n < 0) {
 +            VIRT_ERROR (conn, "reading list of domains");
 +            sfree (domids);
 +            return -1;
 +        }
 +
 +        free_block_devices ();
 +        free_interface_devices ();
 +        free_domains ();
 +
 +        /* Fetch each domain and add it to the list, unless ignore. */
 +        for (i = 0; i < n; ++i) {
 +            virDomainPtr dom = NULL;
 +            const char *name;
 +            char *xml = NULL;
 +            xmlDocPtr xml_doc = NULL;
 +            xmlXPathContextPtr xpath_ctx = NULL;
 +            xmlXPathObjectPtr xpath_obj = NULL;
 +            int j;
 +
 +            dom = virDomainLookupByID (conn, domids[i]);
 +            if (dom == NULL) {
 +                VIRT_ERROR (conn, "virDomainLookupByID");
 +                /* Could be that the domain went away -- ignore it anyway. */
 +                continue;
 +            }
 +
 +            name = virDomainGetName (dom);
 +            if (name == NULL) {
 +                VIRT_ERROR (conn, "virDomainGetName");
 +                goto cont;
 +            }
 +
 +            if (il_domains && ignorelist_match (il_domains, name) != 0)
 +                goto cont;
 +
 +            if (add_domain (dom) < 0) {
 +                ERROR (PLUGIN_NAME " plugin: malloc failed.");
 +                goto cont;
 +            }
 +
 +            /* Get a list of devices for this domain. */
 +            xml = virDomainGetXMLDesc (dom, 0);
 +            if (!xml) {
 +                VIRT_ERROR (conn, "virDomainGetXMLDesc");
 +                goto cont;
 +            }
 +
 +            /* Yuck, XML.  Parse out the devices. */
 +            xml_doc = xmlReadDoc ((xmlChar *) xml, NULL, NULL, XML_PARSE_NONET);
 +            if (xml_doc == NULL) {
 +                VIRT_ERROR (conn, "xmlReadDoc");
 +                goto cont;
 +            }
 +
 +            xpath_ctx = xmlXPathNewContext (xml_doc);
 +
 +            /* Block devices. */
 +            xpath_obj = xmlXPathEval
 +                ((xmlChar *) "/domain/devices/disk/target[@dev]",
 +                 xpath_ctx);
 +            if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
 +                xpath_obj->nodesetval == NULL)
 +                goto cont;
 +
 +            for (j = 0; j < xpath_obj->nodesetval->nodeNr; ++j) {
 +                xmlNodePtr node;
 +                char *path = NULL;
 +
 +                node = xpath_obj->nodesetval->nodeTab[j];
 +                if (!node) continue;
 +                path = (char *) xmlGetProp (node, (xmlChar *) "dev");
 +                if (!path) continue;
 +
 +                if (il_block_devices &&
 +                    ignore_device_match (il_block_devices, name, path) != 0)
 +                    goto cont2;
 +
 +                add_block_device (dom, path);
 +            cont2:
 +                if (path) xmlFree (path);
 +            }
 +            xmlXPathFreeObject (xpath_obj);
 +
 +            /* Network interfaces. */
 +            xpath_obj = xmlXPathEval
 +                ((xmlChar *) "/domain/devices/interface[target[@dev]]",
 +                 xpath_ctx);
 +            if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
 +                xpath_obj->nodesetval == NULL)
 +                goto cont;
 +
 +            xmlNodeSetPtr xml_interfaces = xpath_obj->nodesetval;
 +
 +            for (j = 0; j < xml_interfaces->nodeNr; ++j) {
 +                char *path = NULL;
 +                char *address = NULL;
 +                xmlNodePtr xml_interface;
 +
 +                xml_interface = xml_interfaces->nodeTab[j];
 +                if (!xml_interface) continue;
 +                xmlNodePtr child = NULL;
 +
 +                for (child = xml_interface->children; child; child = child->next) {
 +                    if (child->type != XML_ELEMENT_NODE) continue;
 +
 +                    if (xmlStrEqual(child->name, (const xmlChar *) "target")) {
 +                        path = (char *) xmlGetProp (child, (const xmlChar *) "dev");
 +                        if (!path) continue;
 +                    } else if (xmlStrEqual(child->name, (const xmlChar *) "mac")) {
 +                        address = (char *) xmlGetProp (child, (const xmlChar *) "address");
 +                        if (!address) continue;
 +                    }
 +                }
 +
 +                if (il_interface_devices &&
 +                    (ignore_device_match (il_interface_devices, name, path) != 0 ||
 +                     ignore_device_match (il_interface_devices, name, address) != 0))
 +                    goto cont3;
 +
 +                add_interface_device (dom, path, address, j+1);
 +                cont3:
 +                    if (path) xmlFree (path);
 +                    if (address) xmlFree (address);
 +            }
 +
 +        cont:
 +            if (xpath_obj) xmlXPathFreeObject (xpath_obj);
 +            if (xpath_ctx) xmlXPathFreeContext (xpath_ctx);
 +            if (xml_doc) xmlFreeDoc (xml_doc);
 +            sfree (xml);
 +        }
 +
 +        sfree (domids);
 +    }
 +
 +    return 0;
 +}
 +
 +static void
 +free_domains ()
 +{
 +    int i;
 +
 +    if (domains) {
 +        for (i = 0; i < nr_domains; ++i)
 +            virDomainFree (domains[i]);
 +        sfree (domains);
 +    }
 +    domains = NULL;
 +    nr_domains = 0;
 +}
 +
 +static int
 +add_domain (virDomainPtr dom)
 +{
 +    virDomainPtr *new_ptr;
 +    int new_size = sizeof (domains[0]) * (nr_domains+1);
 +
 +    if (domains)
 +        new_ptr = realloc (domains, new_size);
 +    else
 +        new_ptr = malloc (new_size);
 +
 +    if (new_ptr == NULL)
 +        return -1;
 +
 +    domains = new_ptr;
 +    domains[nr_domains] = dom;
 +    return nr_domains++;
 +}
 +
 +static void
 +free_block_devices ()
 +{
 +    int i;
 +
 +    if (block_devices) {
 +        for (i = 0; i < nr_block_devices; ++i)
 +            sfree (block_devices[i].path);
 +        sfree (block_devices);
 +    }
 +    block_devices = NULL;
 +    nr_block_devices = 0;
 +}
 +
 +static int
 +add_block_device (virDomainPtr dom, const char *path)
 +{
 +    struct block_device *new_ptr;
 +    int new_size = sizeof (block_devices[0]) * (nr_block_devices+1);
 +    char *path_copy;
 +
 +    path_copy = strdup (path);
 +    if (!path_copy)
 +        return -1;
 +
 +    if (block_devices)
 +        new_ptr = realloc (block_devices, new_size);
 +    else
 +        new_ptr = malloc (new_size);
 +
 +    if (new_ptr == NULL) {
 +        sfree (path_copy);
 +        return -1;
 +    }
 +    block_devices = new_ptr;
 +    block_devices[nr_block_devices].dom = dom;
 +    block_devices[nr_block_devices].path = path_copy;
 +    return nr_block_devices++;
 +}
 +
 +static void
 +free_interface_devices ()
 +{
 +    int i;
 +
 +    if (interface_devices) {
 +        for (i = 0; i < nr_interface_devices; ++i) {
 +            sfree (interface_devices[i].path);
 +            sfree (interface_devices[i].address);
 +            sfree (interface_devices[i].number);
 +        }
 +        sfree (interface_devices);
 +    }
 +    interface_devices = NULL;
 +    nr_interface_devices = 0;
 +}
 +
 +static int
 +add_interface_device (virDomainPtr dom, const char *path, const char *address, unsigned int number)
 +{
 +    struct interface_device *new_ptr;
 +    int new_size = sizeof (interface_devices[0]) * (nr_interface_devices+1);
 +    char *path_copy, *address_copy, number_string[15];
 +
++    if ((path == NULL) || (address == NULL))
++        return EINVAL;
++
 +    path_copy = strdup (path);
 +    if (!path_copy) return -1;
 +
 +    address_copy = strdup (address);
 +    if (!address_copy) {
 +        sfree(path_copy);
 +        return -1;
 +    }
 +
 +    snprintf(number_string, sizeof (number_string), "interface-%u", number);
 +
 +    if (interface_devices)
 +        new_ptr = realloc (interface_devices, new_size);
 +    else
 +        new_ptr = malloc (new_size);
 +
 +    if (new_ptr == NULL) {
 +        sfree (path_copy);
 +        sfree (address_copy);
 +        return -1;
 +    }
 +    interface_devices = new_ptr;
 +    interface_devices[nr_interface_devices].dom = dom;
 +    interface_devices[nr_interface_devices].path = path_copy;
 +    interface_devices[nr_interface_devices].address = address_copy;
 +    interface_devices[nr_interface_devices].number = strdup(number_string);
 +    return nr_interface_devices++;
 +}
 +
 +static int
 +ignore_device_match (ignorelist_t *il, const char *domname, const char *devpath)
 +{
 +    char *name;
 +    int n, r;
 +
++    if ((domname == NULL) || (devpath == NULL))
++        return 0;
++
 +    n = sizeof (char) * (strlen (domname) + strlen (devpath) + 2);
 +    name = malloc (n);
 +    if (name == NULL) {
 +        ERROR (PLUGIN_NAME " plugin: malloc failed.");
 +        return 0;
 +    }
 +    ssnprintf (name, n, "%s:%s", domname, devpath);
 +    r = ignorelist_match (il, name);
 +    sfree (name);
 +    return r;
 +}
 +
 +static int
 +lv_shutdown (void)
 +{
 +    free_block_devices ();
 +    free_interface_devices ();
 +    free_domains ();
 +
 +    if (conn != NULL)
 +        virConnectClose (conn);
 +    conn = NULL;
 +
 +    ignorelist_free (il_domains);
 +    il_domains = NULL;
 +    ignorelist_free (il_block_devices);
 +    il_block_devices = NULL;
 +    ignorelist_free (il_interface_devices);
 +    il_interface_devices = NULL;
 +
 +    return 0;
 +}
 +
 +void
 +module_register (void)
 +{
 +    plugin_register_config (PLUGIN_NAME,
 +    lv_config,
 +    config_keys, NR_CONFIG_KEYS);
 +    plugin_register_init (PLUGIN_NAME, lv_init);
 +    plugin_register_read (PLUGIN_NAME, lv_read);
 +    plugin_register_shutdown (PLUGIN_NAME, lv_shutdown);
 +}
 +
 +/*
 + * vim: shiftwidth=4 tabstop=8 softtabstop=4 expandtab fdm=marker
 + */