/**
- * collectd - src/utils_cms_getval.c
- * Copyright (C) 2008 Florian octo Forster
+ * collectd - src/utils_cmd_getval.c
+ * Copyright (C) 2008 Florian octo Forster
*
- * 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.
+ * 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:
*
- * 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.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * 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
+ * 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.
*
- * Author:
- * Florian octo Forster <octo at verplant.org>
+ * Authors:
+ * Florian octo Forster <octo at collectd.org>
**/
#include "collectd.h"
#include "plugin.h"
#include "utils_cache.h"
+#include "utils_parse_option.h"
+
+#define print_to_socket(fh, ...) \
+ if (fprintf (fh, __VA_ARGS__) < 0) { \
+ char errbuf[1024]; \
+ WARNING ("handle_getval: failed to write to socket #%i: %s", \
+ fileno (fh), sstrerror (errno, errbuf, sizeof (errbuf))); \
+ return -1; \
+ }
-int handle_getval (FILE *fh, char **fields, int fields_num)
+int handle_getval (FILE *fh, char *buffer)
{
+ char *command;
+ char *identifier;
+ char *identifier_copy;
+
char *hostname;
char *plugin;
char *plugin_instance;
const data_set_t *ds;
int status;
- int i;
+ size_t i;
+
+ if ((fh == NULL) || (buffer == NULL))
+ return (-1);
+
+ DEBUG ("utils_cmd_getval: handle_getval (fh = %p, buffer = %s);",
+ (void *) fh, buffer);
- if (fields_num != 2)
+ command = NULL;
+ status = parse_string (&buffer, &command);
+ if (status != 0)
{
- DEBUG ("unixsock plugin: Wrong number of fields: %i", fields_num);
- fprintf (fh, "-1 Wrong number of fields: Got %i, expected 2.\n",
- fields_num);
- fflush (fh);
+ print_to_socket (fh, "-1 Cannot parse command.\n");
return (-1);
}
- DEBUG ("unixsock plugin: Got query for `%s'", fields[1]);
+ assert (command != NULL);
- if (strlen (fields[1]) < strlen ("h/p/t"))
+ if (strcasecmp ("GETVAL", command) != 0)
{
- fprintf (fh, "-1 Invalied identifier, %s", fields[1]);
- fflush (fh);
+ print_to_socket (fh, "-1 Unexpected command: `%s'.\n", command);
return (-1);
}
- status = parse_identifier (fields[1], &hostname,
+ identifier = NULL;
+ status = parse_string (&buffer, &identifier);
+ if (status != 0)
+ {
+ print_to_socket (fh, "-1 Cannot parse identifier.\n");
+ return (-1);
+ }
+ assert (identifier != NULL);
+
+ if (*buffer != 0)
+ {
+ print_to_socket (fh, "-1 Garbage after end of command: %s\n", buffer);
+ return (-1);
+ }
+
+ /* parse_identifier() modifies its first argument,
+ * returning pointers into it */
+ identifier_copy = sstrdup (identifier);
+
+ status = parse_identifier (identifier_copy, &hostname,
&plugin, &plugin_instance,
&type, &type_instance);
if (status != 0)
{
- DEBUG ("unixsock plugin: Cannot parse `%s'", fields[1]);
- fprintf (fh, "-1 Cannot parse identifier.\n");
- fflush (fh);
+ DEBUG ("handle_getval: Cannot parse identifier `%s'.", identifier);
+ print_to_socket (fh, "-1 Cannot parse identifier `%s'.\n", identifier);
+ sfree (identifier_copy);
return (-1);
}
ds = plugin_get_ds (type);
if (ds == NULL)
{
- DEBUG ("unixsock plugin: plugin_get_ds (%s) == NULL;", type);
- fprintf (fh, "-1 Type `%s' is unknown.\n", type);
- fflush (fh);
+ DEBUG ("handle_getval: plugin_get_ds (%s) == NULL;", type);
+ print_to_socket (fh, "-1 Type `%s' is unknown.\n", type);
+ sfree (identifier_copy);
return (-1);
}
values = NULL;
values_num = 0;
- status = uc_get_rate_by_name (fields[1], &values, &values_num);
+ status = uc_get_rate_by_name (identifier, &values, &values_num);
if (status != 0)
{
- fprintf (fh, "-1 No such value");
- fflush (fh);
+ print_to_socket (fh, "-1 No such value\n");
+ sfree (identifier_copy);
return (-1);
}
- if (ds->ds_num != values_num)
+ if ((size_t) ds->ds_num != values_num)
{
ERROR ("ds[%s]->ds_num = %i, "
- "but uc_get_rate_by_name returned %i values.",
- ds->type, ds->ds_num, values_num);
- fprintf (fh, "-1 Error reading value from cache.\n");
- fflush (fh);
+ "but uc_get_rate_by_name returned %u values.",
+ ds->type, ds->ds_num, (unsigned int) values_num);
+ print_to_socket (fh, "-1 Error reading value from cache.\n");
sfree (values);
+ sfree (identifier_copy);
return (-1);
}
- fprintf (fh, "%u", (unsigned int) values_num);
+ print_to_socket (fh, "%u Value%s found\n", (unsigned int) values_num,
+ (values_num == 1) ? "" : "s");
for (i = 0; i < values_num; i++)
{
- fprintf (fh, " %s=", ds->ds[i].name);
+ print_to_socket (fh, "%s=", ds->ds[i].name);
if (isnan (values[i]))
- fprintf (fh, "NaN");
+ {
+ print_to_socket (fh, "NaN\n");
+ }
else
- fprintf (fh, "%12e", values[i]);
+ {
+ print_to_socket (fh, "%12e\n", values[i]);
+ }
}
- fprintf (fh, "\n");
- fflush (fh);
-
sfree (values);
+ sfree (identifier_copy);
return (0);
} /* int handle_getval */
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