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utils_cmd_putval.c
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utils_cmd_putval.c
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/**
* collectd - src/utils_cms_putval.c
* Copyright (C) 2007-2009 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.
*
* 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:
* Florian octo Forster <octo at verplant.org>
**/
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#include "utils_parse_option.h"
#define print_to_socket(fh, ...) \
if (fprintf (fh, __VA_ARGS__) < 0) { \
char errbuf[1024]; \
WARNING ("handle_putval: failed to write to socket #%i: %s", \
fileno (fh), sstrerror (errno, errbuf, sizeof (errbuf))); \
return -1; \
}
static int dispatch_values (const data_set_t *ds, value_list_t *vl,
FILE *fh, char *buffer)
{
int status;
status = parse_values (buffer, vl, ds);
if (status != 0)
{
print_to_socket (fh, "-1 Parsing the values string failed.\n");
return (-1);
}
plugin_dispatch_values (vl);
return (0);
} /* int dispatch_values */
static int set_option (value_list_t *vl, const char *key, const char *value)
{
if ((vl == NULL) || (key == NULL) || (value == NULL))
return (-1);
if (strcasecmp ("interval", key) == 0)
{
int tmp;
char *endptr;
endptr = NULL;
errno = 0;
tmp = strtol (value, &endptr, 0);
if ((errno == 0) && (endptr != NULL)
&& (endptr != value) && (tmp > 0))
vl->interval = tmp;
}
else
return (1);
return (0);
} /* int parse_option */
int handle_putval (FILE *fh, char *buffer)
{
char *command;
char *identifier;
char *hostname;
char *plugin;
char *plugin_instance;
char *type;
char *type_instance;
int status;
int values_submitted;
char *identifier_copy;
const data_set_t *ds;
value_list_t vl = VALUE_LIST_INIT;
DEBUG ("utils_cmd_putval: handle_putval (fh = %p, buffer = %s);",
(void *) fh, buffer);
command = NULL;
status = parse_string (&buffer, &command);
if (status != 0)
{
print_to_socket (fh, "-1 Cannot parse command.\n");
return (-1);
}
assert (command != NULL);
if (strcasecmp ("PUTVAL", command) != 0)
{
print_to_socket (fh, "-1 Unexpected command: `%s'.\n", command);
return (-1);
}
identifier = NULL;
status = parse_string (&buffer, &identifier);
if (status != 0)
{
print_to_socket (fh, "-1 Cannot parse identifier.\n");
return (-1);
}
assert (identifier != NULL);
/* 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 ("handle_putval: Cannot parse identifier `%s'.",
identifier);
print_to_socket (fh, "-1 Cannot parse identifier `%s'.\n",
identifier);
sfree (identifier_copy);
return (-1);
}
if ((strlen (hostname) >= sizeof (vl.host))
|| (strlen (plugin) >= sizeof (vl.plugin))
|| ((plugin_instance != NULL)
&& (strlen (plugin_instance) >= sizeof (vl.plugin_instance)))
|| ((type_instance != NULL)
&& (strlen (type_instance) >= sizeof (vl.type_instance))))
{
print_to_socket (fh, "-1 Identifier too long.\n");
sfree (identifier_copy);
return (-1);
}
sstrncpy (vl.host, hostname, sizeof (vl.host));
sstrncpy (vl.plugin, plugin, sizeof (vl.plugin));
sstrncpy (vl.type, type, sizeof (vl.type));
if (plugin_instance != NULL)
sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
if (type_instance != NULL)
sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
ds = plugin_get_ds (type);
if (ds == NULL) {
print_to_socket (fh, "-1 Type `%s' isn't defined.\n", type);
sfree (identifier_copy);
return (-1);
}
/* Free identifier_copy */
hostname = NULL;
plugin = NULL; plugin_instance = NULL;
type = NULL; type_instance = NULL;
sfree (identifier_copy);
vl.values_len = ds->ds_num;
vl.values = (value_t *) malloc (vl.values_len * sizeof (value_t));
if (vl.values == NULL)
{
print_to_socket (fh, "-1 malloc failed.\n");
return (-1);
}
/* All the remaining fields are part of the optionlist. */
values_submitted = 0;
while (*buffer != 0)
{
char *string = NULL;
char *value = NULL;
status = parse_option (&buffer, &string, &value);
if (status < 0)
{
/* parse_option failed, buffer has been modified.
* => we need to abort */
print_to_socket (fh, "-1 Misformatted option.\n");
return (-1);
}
else if (status == 0)
{
assert (string != NULL);
assert (value != NULL);
set_option (&vl, string, value);
continue;
}
/* else: parse_option but buffer has not been modified. This is
* the default if no `=' is found.. */
status = parse_string (&buffer, &string);
if (status != 0)
{
print_to_socket (fh, "-1 Misformatted value.\n");
return (-1);
}
assert (string != NULL);
status = dispatch_values (ds, &vl, fh, string);
if (status != 0)
{
/* An error has already been printed. */
return (-1);
}
values_submitted++;
} /* while (*buffer != 0) */
/* Done parsing the options. */
print_to_socket (fh, "0 Success: %i %s been dispatched.\n",
values_submitted,
(values_submitted == 1) ? "value has" : "values have");
sfree (vl.values);
return (0);
} /* int handle_putval */
int create_putval (char *ret, size_t ret_len, /* {{{ */
const data_set_t *ds, const value_list_t *vl)
{
char buffer_ident[6 * DATA_MAX_NAME_LEN];
char buffer_values[1024];
int status;
status = FORMAT_VL (buffer_ident, sizeof (buffer_ident), vl);
if (status != 0)
return (status);
escape_string (buffer_ident, sizeof (buffer_ident));
status = format_values (buffer_values, sizeof (buffer_values),
ds, vl, /* store rates = */ 0);
if (status != 0)
return (status);
escape_string (buffer_values, sizeof (buffer_values));
ssnprintf (ret, ret_len,
"PUTVAL %s interval=%i %s",
buffer_ident,
(vl->interval > 0) ? vl->interval : interval_g,
buffer_values);
return (0);
} /* }}} int create_putval */