move sources

diff --git a/src/write_graphite.c b/src/write_graphite.c
new file mode 100644 (file)
index 0000000..322b825
--- /dev/null
+++ b/src/write_graphite.c
@@ -0,0 +1,692 @@
+/**
+ * collectd - src/write_graphite.c
+ * Copyright (C) 2011  Scott Sanders
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * Author:
+ *   Scott Sanders <scott@jssjr.com>
+ *
+ *   based on the excellent write_http plugin
+ **/
+
+ /* write_graphite plugin configuation example
+  *
+  * <Plugin write_graphite>
+  *   <Carbon "local-agent">
+  *     Host "localhost"
+  *     Port 2003
+  *     Prefix "collectd"
+  *   </Carbon>
+  * </Plugin>
+  */
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+
+#include "utils_cache.h"
+#include "utils_parse_option.h"
+
+/* Folks without pthread will need to disable this plugin. */
+#include <pthread.h>
+
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <netinet/in.h>
+#include <netdb.h>
+
+#ifndef WG_FORMAT_NAME
+#define WG_FORMAT_NAME(ret, ret_len, vl, prefix, name) \
+        wg_format_name (ret, ret_len, (vl)->host, (vl)->plugin, (vl)->plugin_instance, \
+                        (vl)->type, (vl)->type_instance, prefix, name)
+#endif
+
+/*
+ * Private variables
+ */
+struct wg_callback
+{
+    char    *name;
+
+    int      sock_fd;
+    struct hostent *server;
+
+    char    *host;
+    int      port;
+    char    *prefix;
+
+    char     send_buf[4096];
+    size_t   send_buf_free;
+    size_t   send_buf_fill;
+    cdtime_t send_buf_init_time;
+
+    pthread_mutex_t send_lock;
+};
+
+
+/*
+ * Functions
+ */
+static void wg_reset_buffer (struct wg_callback *cb) /* {{{ */
+{
+    memset (cb->send_buf, 0, sizeof (cb->send_buf));
+    cb->send_buf_free = sizeof (cb->send_buf);
+    cb->send_buf_fill = 0;
+    cb->send_buf_init_time = cdtime ();
+} /* }}} wg_reset_buffer */
+
+static int wg_send_buffer (struct wg_callback *cb) /* {{{ */
+{
+    int status = 0;
+
+    status = write (cb->sock_fd, cb->send_buf, strlen (cb->send_buf));
+    if (status < 0)
+    {
+        ERROR ("write_graphite plugin: send failed with "
+                "status %i (%s)",
+                status,
+                strerror (errno));
+
+        pthread_mutex_lock (&cb->send_lock);
+
+        DEBUG ("write_graphite plugin: closing socket and restting fd "
+                "so reinit will occur");
+        close (cb->sock_fd);
+        cb->sock_fd = -1;
+
+        pthread_mutex_unlock (&cb->send_lock);
+
+        return (-1);
+    }
+    return (0);
+} /* }}} wg_send_buffer */
+
+static int wg_flush_nolock (cdtime_t timeout, struct wg_callback *cb) /* {{{ */
+{
+    int status;
+
+    DEBUG ("write_graphite plugin: wg_flush_nolock: timeout = %.3f; "
+            "send_buf_fill = %zu;",
+            (double)timeout,
+            cb->send_buf_fill);
+
+    /* timeout == 0  => flush unconditionally */
+    if (timeout > 0)
+    {
+        cdtime_t now;
+
+        now = cdtime ();
+        if ((cb->send_buf_init_time + timeout) > now)
+            return (0);
+    }
+
+    if (cb->send_buf_fill <= 0)
+    {
+        cb->send_buf_init_time = cdtime ();
+        return (0);
+    }
+
+    status = wg_send_buffer (cb);
+    wg_reset_buffer (cb);
+
+    return (status);
+} /* }}} wg_flush_nolock */
+
+static int wg_callback_init (struct wg_callback *cb) /* {{{ */
+{
+    int status;
+
+    struct sockaddr_in serv_addr;
+
+    if (cb->sock_fd > 0)
+        return (0);
+
+    cb->sock_fd = socket (AF_INET, SOCK_STREAM, 0);
+    if (cb->sock_fd < 0)
+    {
+        ERROR ("write_graphite plugin: socket failed: %s", strerror (errno));
+        return (-1);
+    }
+    cb->server = gethostbyname(cb->host);
+    if (cb->server == NULL)
+    {
+        ERROR ("write_graphite plugin: no such host");
+        return (-1);
+    }
+    memset (&serv_addr, 0, sizeof (serv_addr));
+    serv_addr.sin_family = AF_INET;
+    memcpy (&serv_addr.sin_addr.s_addr,
+                cb->server->h_addr,
+                cb->server->h_length);
+    serv_addr.sin_port = htons(cb->port);
+
+    status = connect(cb->sock_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
+    if (status < 0)
+    {
+        char errbuf[1024];
+        sstrerror (errno, errbuf, sizeof (errbuf));
+        ERROR ("write_graphite plugin: connect failed: %s", errbuf);
+        close (cb->sock_fd);
+        cb->sock_fd = -1;
+        return (-1);
+    }
+
+    wg_reset_buffer (cb);
+
+    return (0);
+} /* }}} int wg_callback_init */
+
+static void wg_callback_free (void *data) /* {{{ */
+{
+    struct wg_callback *cb;
+
+    if (data == NULL)
+        return;
+
+    cb = data;
+
+    wg_flush_nolock (/* timeout = */ 0, cb);
+
+    close(cb->sock_fd);
+    sfree(cb->name);
+    sfree(cb->host);
+    sfree(cb->prefix);
+
+    sfree(cb);
+} /* }}} void wg_callback_free */
+
+static int wg_flush (cdtime_t timeout, /* {{{ */
+        const char *identifier __attribute__((unused)),
+        user_data_t *user_data)
+{
+    struct wg_callback *cb;
+    int status;
+
+    if (user_data == NULL)
+        return (-EINVAL);
+
+    cb = user_data->data;
+
+    pthread_mutex_lock (&cb->send_lock);
+
+    if (cb->sock_fd < 0)
+    {
+        status = wg_callback_init (cb);
+        if (status != 0)
+        {
+            ERROR ("write_graphite plugin: wg_callback_init failed.");
+            pthread_mutex_unlock (&cb->send_lock);
+            return (-1);
+        }
+    }
+
+    status = wg_flush_nolock (timeout, cb);
+    pthread_mutex_unlock (&cb->send_lock);
+
+    return (status);
+} /* }}} int wg_flush */
+
+static int wg_format_values (char *ret, size_t ret_len, /* {{{ */
+        int ds_num, const data_set_t *ds, const value_list_t *vl,
+        _Bool store_rates)
+{
+    size_t offset = 0;
+    int status;
+    gauge_t *rates = NULL;
+
+    assert (0 == strcmp (ds->type, vl->type));
+
+    memset (ret, 0, ret_len);
+
+#define BUFFER_ADD(...) do { \
+    status = ssnprintf (ret + offset, ret_len - offset, \
+            __VA_ARGS__); \
+    if (status < 1) \
+    { \
+        sfree (rates); \
+        return (-1); \
+    } \
+    else if (((size_t) status) >= (ret_len - offset)) \
+    { \
+        sfree (rates); \
+        return (-1); \
+    } \
+    else \
+    offset += ((size_t) status); \
+} while (0)
+
+    if (ds->ds[ds_num].type == DS_TYPE_GAUGE)
+        BUFFER_ADD ("%f", vl->values[ds_num].gauge);
+    else if (store_rates)
+    {
+        if (rates == NULL)
+            rates = uc_get_rate (ds, vl);
+        if (rates == NULL)
+        {
+            WARNING ("format_values: "
+                    "uc_get_rate failed.");
+            return (-1);
+        }
+        BUFFER_ADD ("%g", rates[ds_num]);
+    }
+    else if (ds->ds[ds_num].type == DS_TYPE_COUNTER)
+        BUFFER_ADD ("%llu", vl->values[ds_num].counter);
+    else if (ds->ds[ds_num].type == DS_TYPE_DERIVE)
+        BUFFER_ADD ("%"PRIi64, vl->values[ds_num].derive);
+    else if (ds->ds[ds_num].type == DS_TYPE_ABSOLUTE)
+        BUFFER_ADD ("%"PRIu64, vl->values[ds_num].absolute);
+    else
+    {
+        ERROR ("format_values plugin: Unknown data source type: %i",
+                ds->ds[ds_num].type);
+        sfree (rates);
+        return (-1);
+    }
+
+#undef BUFFER_ADD
+
+    sfree (rates);
+    return (0);
+} /* }}} int wg_format_values */
+
+static int normalize_hostname (char *dst, const char *src) /* {{{ */
+{
+    size_t i;
+
+    int reps = 0;
+
+    for (i = 0; i < strlen(src) ; i++)
+    {
+        if (src[i] == '.')
+        {
+            dst[i] = '_';
+            ++reps;
+        }
+        else
+            dst[i] = src[i];
+    }
+    dst[i] = '\0';
+
+    return reps;
+} /* }}} int normalize_hostname */
+
+static int wg_format_name (char *ret, int ret_len, /* {{{ */
+                const char *hostname,
+                const char *plugin, const char *plugin_instance,
+                const char *type, const char *type_instance,
+                const char *prefix, const char *ds_name)
+{
+    int  status;
+    char *n_hostname;
+
+    assert (plugin != NULL);
+    assert (type != NULL);
+
+    if ((n_hostname = malloc(strlen(hostname)+1)) == NULL)
+    {
+        ERROR ("Unable to allocate memory for normalized hostname buffer");
+        return (-1);
+    }
+
+    if (normalize_hostname(n_hostname, hostname) == -1)
+    {
+        ERROR ("Unable to normalize hostname");
+        return (-1);
+    }
+
+    if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
+    {
+        if ((type_instance == NULL) || (strlen (type_instance) == 0))
+        {
+            if ((ds_name == NULL) || (strlen (ds_name) == 0))
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s",
+                        prefix, n_hostname, plugin, type);
+            else
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
+                        prefix, n_hostname, plugin, type, ds_name);
+        }
+        else
+        {
+            if ((ds_name == NULL) || (strlen (ds_name) == 0))
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s",
+                        prefix, n_hostname, plugin, type,
+                        type_instance);
+            else
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s.%s",
+                        prefix, n_hostname, plugin, type,
+                        type_instance, ds_name);
+        }
+    }
+    else
+    {
+        if ((type_instance == NULL) || (strlen (type_instance) == 0))
+        {
+            if ((ds_name == NULL) || (strlen (ds_name) == 0))
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
+                        prefix, n_hostname, plugin,
+                        plugin_instance, type);
+            else
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s.%s",
+                        prefix, n_hostname, plugin,
+                        plugin_instance, type, ds_name);
+        }
+        else
+        {
+            if ((ds_name == NULL) || (strlen (ds_name) == 0))
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s",
+                        prefix, n_hostname, plugin,
+                        plugin_instance, type, type_instance);
+            else
+                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s.%s",
+                        prefix, n_hostname, plugin,
+                        plugin_instance, type, type_instance, ds_name);
+        }
+    }
+
+    sfree(n_hostname);
+
+    if ((status < 1) || (status >= ret_len))
+        return (-1);
+    return (0);
+} /* }}} int wg_format_name */
+
+static int wg_send_message (const char* key, const char* value, cdtime_t time, struct wg_callback *cb) /* {{{ */
+{
+    int status;
+    size_t message_len;
+    char message[1024];
+
+    message_len = (size_t) ssnprintf (message, sizeof (message),
+            "%s %s %.0f\n",
+            key,
+            value,
+            CDTIME_T_TO_DOUBLE(time));
+    if (message_len >= sizeof (message)) {
+        ERROR ("write_graphite plugin: message buffer too small: "
+                "Need %zu bytes.", message_len + 1);
+        return (-1);
+    }
+
+
+    pthread_mutex_lock (&cb->send_lock);
+
+    if (cb->sock_fd < 0)
+    {
+        status = wg_callback_init (cb);
+        if (status != 0)
+        {
+            ERROR ("write_graphite plugin: wg_callback_init failed.");
+            pthread_mutex_unlock (&cb->send_lock);
+            return (-1);
+        }
+    }
+
+    if (message_len >= cb->send_buf_free)
+    {
+        status = wg_flush_nolock (/* timeout = */ 0, cb);
+        if (status != 0)
+        {
+            pthread_mutex_unlock (&cb->send_lock);
+            return (status);
+        }
+    }
+    assert (message_len < cb->send_buf_free);
+
+    /* `message_len + 1' because `message_len' does not include the
+     * trailing null byte. Neither does `send_buffer_fill'. */
+    memcpy (cb->send_buf + cb->send_buf_fill,
+            message, message_len + 1);
+    cb->send_buf_fill += message_len;
+    cb->send_buf_free -= message_len;
+
+    DEBUG ("write_graphite plugin: <%s:%d> buf %zu/%zu (%g%%) \"%s\"",
+            cb->host,
+            cb->port,
+            cb->send_buf_fill, sizeof (cb->send_buf),
+            100.0 * ((double) cb->send_buf_fill) / ((double) sizeof (cb->send_buf)),
+            message);
+
+    /* Check if we have enough space for this message. */
+    pthread_mutex_unlock (&cb->send_lock);
+
+    return (0);
+} /* }}} int wg_send_message */
+
+static int wg_write_messages (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+                        struct wg_callback *cb)
+{
+    char key[10*DATA_MAX_NAME_LEN];
+    char values[512];
+
+    int status, i;
+
+    if (0 != strcmp (ds->type, vl->type))
+    {
+        ERROR ("write_graphite plugin: DS type does not match "
+                "value list type");
+        return -1;
+    }
+
+    if (ds->ds_num > 1)
+    {
+        for (i = 0; i < ds->ds_num; i++)
+        {
+            /* Copy the identifier to `key' and escape it. */
+            status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, ds->ds[i].name);
+            if (status != 0)
+            {
+                ERROR ("write_graphite plugin: error with format_name");
+                return (status);
+            }
+
+            escape_string (key, sizeof (key));
+            /* Convert the values to an ASCII representation and put that into
+             * `values'. */
+            status = wg_format_values (values, sizeof (values), i, ds, vl, 0);
+            if (status != 0)
+            {
+                ERROR ("write_graphite plugin: error with "
+                        "wg_format_values");
+                return (status);
+            }
+
+            /* Send the message to graphite */
+            status = wg_send_message (key, values, vl->time, cb);
+            if (status != 0)
+            {
+                ERROR ("write_graphite plugin: error with "
+                        "wg_send_message");
+                return (status);
+            }
+        }
+    }
+    else
+    {
+        /* Copy the identifier to `key' and escape it. */
+        status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, NULL);
+        if (status != 0)
+        {
+            ERROR ("write_graphite plugin: error with format_name");
+            return (status);
+        }
+
+        escape_string (key, sizeof (key));
+        /* Convert the values to an ASCII representation and put that into
+         * `values'. */
+        status = wg_format_values (values, sizeof (values), 0, ds, vl, 0);
+        if (status != 0)
+        {
+            ERROR ("write_graphite plugin: error with "
+                    "wg_format_values");
+            return (status);
+        }
+
+        /* Send the message to graphite */
+        status = wg_send_message (key, values, vl->time, cb);
+        if (status != 0)
+        {
+            ERROR ("write_graphite plugin: error with "
+                    "wg_send_message");
+            return (status);
+        }
+    }
+
+    return (0);
+} /* }}} int wg_write_messages */
+
+static int wg_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+        user_data_t *user_data)
+{
+    struct wg_callback *cb;
+    int status;
+
+    if (user_data == NULL)
+        return (-EINVAL);
+
+    cb = user_data->data;
+
+    status = wg_write_messages (ds, vl, cb);
+
+    return (status);
+} /* }}} int wg_write */
+
+static int config_set_number (int *dest, /* {{{ */
+        oconfig_item_t *ci)
+{
+    if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
+    {
+        WARNING ("write_graphite plugin: The `%s' config option "
+                "needs exactly one numeric argument.", ci->key);
+        return (-1);
+    }
+
+    *dest = ci->values[0].value.number;
+
+    return (0);
+} /* }}} int config_set_number */
+
+static int config_set_string (char **ret_string, /* {{{ */
+        oconfig_item_t *ci)
+{
+    char *string;
+
+    if ((ci->values_num != 1)
+            || (ci->values[0].type != OCONFIG_TYPE_STRING))
+    {
+        WARNING ("write_graphite plugin: The `%s' config option "
+                "needs exactly one string argument.", ci->key);
+        return (-1);
+    }
+
+    string = strdup (ci->values[0].value.string);
+    if (string == NULL)
+    {
+        ERROR ("write_graphite plugin: strdup failed.");
+        return (-1);
+    }
+
+    if (*ret_string != NULL)
+        sfree (*ret_string);
+    *ret_string = string;
+
+    return (0);
+} /* }}} int config_set_string */
+
+static int wg_config_carbon (oconfig_item_t *ci) /* {{{ */
+{
+    struct wg_callback *cb;
+    user_data_t user_data;
+    int i;
+
+    cb = malloc (sizeof (*cb));
+    if (cb == NULL)
+    {
+        ERROR ("write_graphite plugin: malloc failed.");
+        return (-1);
+    }
+    memset (cb, 0, sizeof (*cb));
+    cb->sock_fd = -1;
+    cb->host = NULL;
+    cb->name = NULL;
+    cb->port = 2003;
+    cb->prefix = NULL;
+    cb->server = NULL;
+
+    pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
+
+    config_set_string (&cb->name, ci);
+    if (cb->name == NULL)
+        return (-1);
+
+    for (i = 0; i < ci->children_num; i++)
+    {
+        oconfig_item_t *child = ci->children + i;
+
+        if (strcasecmp ("Host", child->key) == 0)
+            config_set_string (&cb->host, child);
+        else if (strcasecmp ("Port", child->key) == 0)
+            config_set_number (&cb->port, child);
+        else if (strcasecmp ("Prefix", child->key) == 0)
+            config_set_string (&cb->prefix, child);
+        else
+        {
+            ERROR ("write_graphite plugin: Invalid configuration "
+                        "option: %s.", child->key);
+        }
+    }
+
+    DEBUG ("write_graphite: Registering write callback to carbon agent "
+            "%s:%d", cb->host, cb->port);
+
+    memset (&user_data, 0, sizeof (user_data));
+    user_data.data = cb;
+    user_data.free_func = NULL;
+    plugin_register_flush ("write_graphite", wg_flush, &user_data);
+
+    user_data.free_func = wg_callback_free;
+    plugin_register_write ("write_graphite", wg_write, &user_data);
+
+    return (0);
+} /* }}} int wg_config_carbon */
+
+static int wg_config (oconfig_item_t *ci) /* {{{ */
+{
+    int i;
+
+    for (i = 0; i < ci->children_num; i++)
+    {
+        oconfig_item_t *child = ci->children + i;
+
+        if (strcasecmp ("Carbon", child->key) == 0)
+            wg_config_carbon (child);
+        else
+        {
+            ERROR ("write_graphite plugin: Invalid configuration "
+                        "option: %s.", child->key);
+        }
+    }
+
+    return (0);
+} /* }}} int wg_config */
+
+void module_register (void) /* {{{ */
+{
+    plugin_register_complex_config ("write_graphite", wg_config);
+} /* }}} void module_register */
+
+/* vim: set fdm=marker sw=4 ts=4 sts=4 tw=78 et : */

diff --git a/write_graphite.c b/write_graphite.c
deleted file mode 100644 (file)
index 322b825..0000000
--- a/write_graphite.c
+++ /dev/null
@@ -1,692 +0,0 @@
-/**
- * collectd - src/write_graphite.c
- * Copyright (C) 2011  Scott Sanders
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; only version 2 of the License is applicable.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
- *
- * Author:
- *   Scott Sanders <scott@jssjr.com>
- *
- *   based on the excellent write_http plugin
- **/
-
- /* write_graphite plugin configuation example
-  *
-  * <Plugin write_graphite>
-  *   <Carbon "local-agent">
-  *     Host "localhost"
-  *     Port 2003
-  *     Prefix "collectd"
-  *   </Carbon>
-  * </Plugin>
-  */
-
-#include "collectd.h"
-#include "common.h"
-#include "plugin.h"
-#include "configfile.h"
-
-#include "utils_cache.h"
-#include "utils_parse_option.h"
-
-/* Folks without pthread will need to disable this plugin. */
-#include <pthread.h>
-
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <netinet/in.h>
-#include <netdb.h>
-
-#ifndef WG_FORMAT_NAME
-#define WG_FORMAT_NAME(ret, ret_len, vl, prefix, name) \
-        wg_format_name (ret, ret_len, (vl)->host, (vl)->plugin, (vl)->plugin_instance, \
-                        (vl)->type, (vl)->type_instance, prefix, name)
-#endif
-
-/*
- * Private variables
- */
-struct wg_callback
-{
-    char    *name;
-
-    int      sock_fd;
-    struct hostent *server;
-
-    char    *host;
-    int      port;
-    char    *prefix;
-
-    char     send_buf[4096];
-    size_t   send_buf_free;
-    size_t   send_buf_fill;
-    cdtime_t send_buf_init_time;
-
-    pthread_mutex_t send_lock;
-};
-
-
-/*
- * Functions
- */
-static void wg_reset_buffer (struct wg_callback *cb) /* {{{ */
-{
-    memset (cb->send_buf, 0, sizeof (cb->send_buf));
-    cb->send_buf_free = sizeof (cb->send_buf);
-    cb->send_buf_fill = 0;
-    cb->send_buf_init_time = cdtime ();
-} /* }}} wg_reset_buffer */
-
-static int wg_send_buffer (struct wg_callback *cb) /* {{{ */
-{
-    int status = 0;
-
-    status = write (cb->sock_fd, cb->send_buf, strlen (cb->send_buf));
-    if (status < 0)
-    {
-        ERROR ("write_graphite plugin: send failed with "
-                "status %i (%s)",
-                status,
-                strerror (errno));
-
-        pthread_mutex_lock (&cb->send_lock);
-
-        DEBUG ("write_graphite plugin: closing socket and restting fd "
-                "so reinit will occur");
-        close (cb->sock_fd);
-        cb->sock_fd = -1;
-
-        pthread_mutex_unlock (&cb->send_lock);
-
-        return (-1);
-    }
-    return (0);
-} /* }}} wg_send_buffer */
-
-static int wg_flush_nolock (cdtime_t timeout, struct wg_callback *cb) /* {{{ */
-{
-    int status;
-
-    DEBUG ("write_graphite plugin: wg_flush_nolock: timeout = %.3f; "
-            "send_buf_fill = %zu;",
-            (double)timeout,
-            cb->send_buf_fill);
-
-    /* timeout == 0  => flush unconditionally */
-    if (timeout > 0)
-    {
-        cdtime_t now;
-
-        now = cdtime ();
-        if ((cb->send_buf_init_time + timeout) > now)
-            return (0);
-    }
-
-    if (cb->send_buf_fill <= 0)
-    {
-        cb->send_buf_init_time = cdtime ();
-        return (0);
-    }
-
-    status = wg_send_buffer (cb);
-    wg_reset_buffer (cb);
-
-    return (status);
-} /* }}} wg_flush_nolock */
-
-static int wg_callback_init (struct wg_callback *cb) /* {{{ */
-{
-    int status;
-
-    struct sockaddr_in serv_addr;
-
-    if (cb->sock_fd > 0)
-        return (0);
-
-    cb->sock_fd = socket (AF_INET, SOCK_STREAM, 0);
-    if (cb->sock_fd < 0)
-    {
-        ERROR ("write_graphite plugin: socket failed: %s", strerror (errno));
-        return (-1);
-    }
-    cb->server = gethostbyname(cb->host);
-    if (cb->server == NULL)
-    {
-        ERROR ("write_graphite plugin: no such host");
-        return (-1);
-    }
-    memset (&serv_addr, 0, sizeof (serv_addr));
-    serv_addr.sin_family = AF_INET;
-    memcpy (&serv_addr.sin_addr.s_addr,
-                cb->server->h_addr,
-                cb->server->h_length);
-    serv_addr.sin_port = htons(cb->port);
-
-    status = connect(cb->sock_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
-    if (status < 0)
-    {
-        char errbuf[1024];
-        sstrerror (errno, errbuf, sizeof (errbuf));
-        ERROR ("write_graphite plugin: connect failed: %s", errbuf);
-        close (cb->sock_fd);
-        cb->sock_fd = -1;
-        return (-1);
-    }
-
-    wg_reset_buffer (cb);
-
-    return (0);
-} /* }}} int wg_callback_init */
-
-static void wg_callback_free (void *data) /* {{{ */
-{
-    struct wg_callback *cb;
-
-    if (data == NULL)
-        return;
-
-    cb = data;
-
-    wg_flush_nolock (/* timeout = */ 0, cb);
-
-    close(cb->sock_fd);
-    sfree(cb->name);
-    sfree(cb->host);
-    sfree(cb->prefix);
-
-    sfree(cb);
-} /* }}} void wg_callback_free */
-
-static int wg_flush (cdtime_t timeout, /* {{{ */
-        const char *identifier __attribute__((unused)),
-        user_data_t *user_data)
-{
-    struct wg_callback *cb;
-    int status;
-
-    if (user_data == NULL)
-        return (-EINVAL);
-
-    cb = user_data->data;
-
-    pthread_mutex_lock (&cb->send_lock);
-
-    if (cb->sock_fd < 0)
-    {
-        status = wg_callback_init (cb);
-        if (status != 0)
-        {
-            ERROR ("write_graphite plugin: wg_callback_init failed.");
-            pthread_mutex_unlock (&cb->send_lock);
-            return (-1);
-        }
-    }
-
-    status = wg_flush_nolock (timeout, cb);
-    pthread_mutex_unlock (&cb->send_lock);
-
-    return (status);
-} /* }}} int wg_flush */
-
-static int wg_format_values (char *ret, size_t ret_len, /* {{{ */
-        int ds_num, const data_set_t *ds, const value_list_t *vl,
-        _Bool store_rates)
-{
-    size_t offset = 0;
-    int status;
-    gauge_t *rates = NULL;
-
-    assert (0 == strcmp (ds->type, vl->type));
-
-    memset (ret, 0, ret_len);
-
-#define BUFFER_ADD(...) do { \
-    status = ssnprintf (ret + offset, ret_len - offset, \
-            __VA_ARGS__); \
-    if (status < 1) \
-    { \
-        sfree (rates); \
-        return (-1); \
-    } \
-    else if (((size_t) status) >= (ret_len - offset)) \
-    { \
-        sfree (rates); \
-        return (-1); \
-    } \
-    else \
-    offset += ((size_t) status); \
-} while (0)
-
-    if (ds->ds[ds_num].type == DS_TYPE_GAUGE)
-        BUFFER_ADD ("%f", vl->values[ds_num].gauge);
-    else if (store_rates)
-    {
-        if (rates == NULL)
-            rates = uc_get_rate (ds, vl);
-        if (rates == NULL)
-        {
-            WARNING ("format_values: "
-                    "uc_get_rate failed.");
-            return (-1);
-        }
-        BUFFER_ADD ("%g", rates[ds_num]);
-    }
-    else if (ds->ds[ds_num].type == DS_TYPE_COUNTER)
-        BUFFER_ADD ("%llu", vl->values[ds_num].counter);
-    else if (ds->ds[ds_num].type == DS_TYPE_DERIVE)
-        BUFFER_ADD ("%"PRIi64, vl->values[ds_num].derive);
-    else if (ds->ds[ds_num].type == DS_TYPE_ABSOLUTE)
-        BUFFER_ADD ("%"PRIu64, vl->values[ds_num].absolute);
-    else
-    {
-        ERROR ("format_values plugin: Unknown data source type: %i",
-                ds->ds[ds_num].type);
-        sfree (rates);
-        return (-1);
-    }
-
-#undef BUFFER_ADD
-
-    sfree (rates);
-    return (0);
-} /* }}} int wg_format_values */
-
-static int normalize_hostname (char *dst, const char *src) /* {{{ */
-{
-    size_t i;
-
-    int reps = 0;
-
-    for (i = 0; i < strlen(src) ; i++)
-    {
-        if (src[i] == '.')
-        {
-            dst[i] = '_';
-            ++reps;
-        }
-        else
-            dst[i] = src[i];
-    }
-    dst[i] = '\0';
-
-    return reps;
-} /* }}} int normalize_hostname */
-
-static int wg_format_name (char *ret, int ret_len, /* {{{ */
-                const char *hostname,
-                const char *plugin, const char *plugin_instance,
-                const char *type, const char *type_instance,
-                const char *prefix, const char *ds_name)
-{
-    int  status;
-    char *n_hostname;
-
-    assert (plugin != NULL);
-    assert (type != NULL);
-
-    if ((n_hostname = malloc(strlen(hostname)+1)) == NULL)
-    {
-        ERROR ("Unable to allocate memory for normalized hostname buffer");
-        return (-1);
-    }
-
-    if (normalize_hostname(n_hostname, hostname) == -1)
-    {
-        ERROR ("Unable to normalize hostname");
-        return (-1);
-    }
-
-    if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
-    {
-        if ((type_instance == NULL) || (strlen (type_instance) == 0))
-        {
-            if ((ds_name == NULL) || (strlen (ds_name) == 0))
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s",
-                        prefix, n_hostname, plugin, type);
-            else
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
-                        prefix, n_hostname, plugin, type, ds_name);
-        }
-        else
-        {
-            if ((ds_name == NULL) || (strlen (ds_name) == 0))
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s",
-                        prefix, n_hostname, plugin, type,
-                        type_instance);
-            else
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s.%s",
-                        prefix, n_hostname, plugin, type,
-                        type_instance, ds_name);
-        }
-    }
-    else
-    {
-        if ((type_instance == NULL) || (strlen (type_instance) == 0))
-        {
-            if ((ds_name == NULL) || (strlen (ds_name) == 0))
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
-                        prefix, n_hostname, plugin,
-                        plugin_instance, type);
-            else
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s.%s",
-                        prefix, n_hostname, plugin,
-                        plugin_instance, type, ds_name);
-        }
-        else
-        {
-            if ((ds_name == NULL) || (strlen (ds_name) == 0))
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s",
-                        prefix, n_hostname, plugin,
-                        plugin_instance, type, type_instance);
-            else
-                status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s.%s",
-                        prefix, n_hostname, plugin,
-                        plugin_instance, type, type_instance, ds_name);
-        }
-    }
-
-    sfree(n_hostname);
-
-    if ((status < 1) || (status >= ret_len))
-        return (-1);
-    return (0);
-} /* }}} int wg_format_name */
-
-static int wg_send_message (const char* key, const char* value, cdtime_t time, struct wg_callback *cb) /* {{{ */
-{
-    int status;
-    size_t message_len;
-    char message[1024];
-
-    message_len = (size_t) ssnprintf (message, sizeof (message),
-            "%s %s %.0f\n",
-            key,
-            value,
-            CDTIME_T_TO_DOUBLE(time));
-    if (message_len >= sizeof (message)) {
-        ERROR ("write_graphite plugin: message buffer too small: "
-                "Need %zu bytes.", message_len + 1);
-        return (-1);
-    }
-
-
-    pthread_mutex_lock (&cb->send_lock);
-
-    if (cb->sock_fd < 0)
-    {
-        status = wg_callback_init (cb);
-        if (status != 0)
-        {
-            ERROR ("write_graphite plugin: wg_callback_init failed.");
-            pthread_mutex_unlock (&cb->send_lock);
-            return (-1);
-        }
-    }
-
-    if (message_len >= cb->send_buf_free)
-    {
-        status = wg_flush_nolock (/* timeout = */ 0, cb);
-        if (status != 0)
-        {
-            pthread_mutex_unlock (&cb->send_lock);
-            return (status);
-        }
-    }
-    assert (message_len < cb->send_buf_free);
-
-    /* `message_len + 1' because `message_len' does not include the
-     * trailing null byte. Neither does `send_buffer_fill'. */
-    memcpy (cb->send_buf + cb->send_buf_fill,
-            message, message_len + 1);
-    cb->send_buf_fill += message_len;
-    cb->send_buf_free -= message_len;
-
-    DEBUG ("write_graphite plugin: <%s:%d> buf %zu/%zu (%g%%) \"%s\"",
-            cb->host,
-            cb->port,
-            cb->send_buf_fill, sizeof (cb->send_buf),
-            100.0 * ((double) cb->send_buf_fill) / ((double) sizeof (cb->send_buf)),
-            message);
-
-    /* Check if we have enough space for this message. */
-    pthread_mutex_unlock (&cb->send_lock);
-
-    return (0);
-} /* }}} int wg_send_message */
-
-static int wg_write_messages (const data_set_t *ds, const value_list_t *vl, /* {{{ */
-                        struct wg_callback *cb)
-{
-    char key[10*DATA_MAX_NAME_LEN];
-    char values[512];
-
-    int status, i;
-
-    if (0 != strcmp (ds->type, vl->type))
-    {
-        ERROR ("write_graphite plugin: DS type does not match "
-                "value list type");
-        return -1;
-    }
-
-    if (ds->ds_num > 1)
-    {
-        for (i = 0; i < ds->ds_num; i++)
-        {
-            /* Copy the identifier to `key' and escape it. */
-            status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, ds->ds[i].name);
-            if (status != 0)
-            {
-                ERROR ("write_graphite plugin: error with format_name");
-                return (status);
-            }
-
-            escape_string (key, sizeof (key));
-            /* Convert the values to an ASCII representation and put that into
-             * `values'. */
-            status = wg_format_values (values, sizeof (values), i, ds, vl, 0);
-            if (status != 0)
-            {
-                ERROR ("write_graphite plugin: error with "
-                        "wg_format_values");
-                return (status);
-            }
-
-            /* Send the message to graphite */
-            status = wg_send_message (key, values, vl->time, cb);
-            if (status != 0)
-            {
-                ERROR ("write_graphite plugin: error with "
-                        "wg_send_message");
-                return (status);
-            }
-        }
-    }
-    else
-    {
-        /* Copy the identifier to `key' and escape it. */
-        status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, NULL);
-        if (status != 0)
-        {
-            ERROR ("write_graphite plugin: error with format_name");
-            return (status);
-        }
-
-        escape_string (key, sizeof (key));
-        /* Convert the values to an ASCII representation and put that into
-         * `values'. */
-        status = wg_format_values (values, sizeof (values), 0, ds, vl, 0);
-        if (status != 0)
-        {
-            ERROR ("write_graphite plugin: error with "
-                    "wg_format_values");
-            return (status);
-        }
-
-        /* Send the message to graphite */
-        status = wg_send_message (key, values, vl->time, cb);
-        if (status != 0)
-        {
-            ERROR ("write_graphite plugin: error with "
-                    "wg_send_message");
-            return (status);
-        }
-    }
-
-    return (0);
-} /* }}} int wg_write_messages */
-
-static int wg_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
-        user_data_t *user_data)
-{
-    struct wg_callback *cb;
-    int status;
-
-    if (user_data == NULL)
-        return (-EINVAL);
-
-    cb = user_data->data;
-
-    status = wg_write_messages (ds, vl, cb);
-
-    return (status);
-} /* }}} int wg_write */
-
-static int config_set_number (int *dest, /* {{{ */
-        oconfig_item_t *ci)
-{
-    if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
-    {
-        WARNING ("write_graphite plugin: The `%s' config option "
-                "needs exactly one numeric argument.", ci->key);
-        return (-1);
-    }
-
-    *dest = ci->values[0].value.number;
-
-    return (0);
-} /* }}} int config_set_number */
-
-static int config_set_string (char **ret_string, /* {{{ */
-        oconfig_item_t *ci)
-{
-    char *string;
-
-    if ((ci->values_num != 1)
-            || (ci->values[0].type != OCONFIG_TYPE_STRING))
-    {
-        WARNING ("write_graphite plugin: The `%s' config option "
-                "needs exactly one string argument.", ci->key);
-        return (-1);
-    }
-
-    string = strdup (ci->values[0].value.string);
-    if (string == NULL)
-    {
-        ERROR ("write_graphite plugin: strdup failed.");
-        return (-1);
-    }
-
-    if (*ret_string != NULL)
-        sfree (*ret_string);
-    *ret_string = string;
-
-    return (0);
-} /* }}} int config_set_string */
-
-static int wg_config_carbon (oconfig_item_t *ci) /* {{{ */
-{
-    struct wg_callback *cb;
-    user_data_t user_data;
-    int i;
-
-    cb = malloc (sizeof (*cb));
-    if (cb == NULL)
-    {
-        ERROR ("write_graphite plugin: malloc failed.");
-        return (-1);
-    }
-    memset (cb, 0, sizeof (*cb));
-    cb->sock_fd = -1;
-    cb->host = NULL;
-    cb->name = NULL;
-    cb->port = 2003;
-    cb->prefix = NULL;
-    cb->server = NULL;
-
-    pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
-
-    config_set_string (&cb->name, ci);
-    if (cb->name == NULL)
-        return (-1);
-
-    for (i = 0; i < ci->children_num; i++)
-    {
-        oconfig_item_t *child = ci->children + i;
-
-        if (strcasecmp ("Host", child->key) == 0)
-            config_set_string (&cb->host, child);
-        else if (strcasecmp ("Port", child->key) == 0)
-            config_set_number (&cb->port, child);
-        else if (strcasecmp ("Prefix", child->key) == 0)
-            config_set_string (&cb->prefix, child);
-        else
-        {
-            ERROR ("write_graphite plugin: Invalid configuration "
-                        "option: %s.", child->key);
-        }
-    }
-
-    DEBUG ("write_graphite: Registering write callback to carbon agent "
-            "%s:%d", cb->host, cb->port);
-
-    memset (&user_data, 0, sizeof (user_data));
-    user_data.data = cb;
-    user_data.free_func = NULL;
-    plugin_register_flush ("write_graphite", wg_flush, &user_data);
-
-    user_data.free_func = wg_callback_free;
-    plugin_register_write ("write_graphite", wg_write, &user_data);
-
-    return (0);
-} /* }}} int wg_config_carbon */
-
-static int wg_config (oconfig_item_t *ci) /* {{{ */
-{
-    int i;
-
-    for (i = 0; i < ci->children_num; i++)
-    {
-        oconfig_item_t *child = ci->children + i;
-
-        if (strcasecmp ("Carbon", child->key) == 0)
-            wg_config_carbon (child);
-        else
-        {
-            ERROR ("write_graphite plugin: Invalid configuration "
-                        "option: %s.", child->key);
-        }
-    }
-
-    return (0);
-} /* }}} int wg_config */
-
-void module_register (void) /* {{{ */
-{
-    plugin_register_complex_config ("write_graphite", wg_config);
-} /* }}} void module_register */
-
-/* vim: set fdm=marker sw=4 ts=4 sts=4 tw=78 et : */