2 * collectd - src/mbmon.c
3 * Copyright (C) 2006 Flavio Stanchina
4 * Based on the hddtemp plugin.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Flavio Stanchina <flavio at stanchina.net>
27 #include "configfile.h"
29 #if HAVE_NETDB_H && HAVE_SYS_SOCKET_H && HAVE_NETINET_IN_H && HAVE_NETINET_TCP_H
31 # include <sys/socket.h>
32 # include <netinet/in.h>
33 # include <netinet/tcp.h>
34 # define MBMON_HAVE_READ 1
36 # define MBMON_HAVE_READ 0
39 #define MBMON_DEF_HOST "127.0.0.1"
40 #define MBMON_DEF_PORT "411" /* the default for Debian */
42 static const char *config_keys[] =
48 static int config_keys_num = 2;
51 static char *mbmon_host = NULL;
52 static char *mbmon_port = NULL;
59 * Connect to the mbmon daemon and receive data.
62 * `buffer' The buffer where we put the received ascii string.
63 * `buffer_size' Size of the buffer
66 * >= 0 if ok, < 0 otherwise.
69 * Example of possible strings, as received from daemon:
80 * we need to create a new socket each time. Is there another way?
81 * Hm, maybe we can re-use the `sockaddr' structure? -octo
83 static int mbmon_query_daemon (char *buffer, int buffer_size)
92 struct addrinfo ai_hints;
93 struct addrinfo *ai_list, *ai_ptr;
96 memset (&ai_hints, '\0', sizeof (ai_hints));
97 ai_hints.ai_flags = 0;
99 ai_hints.ai_flags |= AI_ADDRCONFIG;
101 ai_hints.ai_family = PF_UNSPEC;
102 ai_hints.ai_socktype = SOCK_STREAM;
103 ai_hints.ai_protocol = IPPROTO_TCP;
107 host = MBMON_DEF_HOST;
111 port = MBMON_DEF_PORT;
113 if ((ai_return = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
116 ERROR ("mbmon: getaddrinfo (%s, %s): %s",
118 (ai_return == EAI_SYSTEM)
119 ? sstrerror (errno, errbuf, sizeof (errbuf))
120 : gai_strerror (ai_return));
125 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
127 /* create our socket descriptor */
128 if ((fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol)) < 0)
131 ERROR ("mbmon: socket: %s",
132 sstrerror (errno, errbuf,
137 /* connect to the mbmon daemon */
138 if (connect (fd, (struct sockaddr *) ai_ptr->ai_addr, ai_ptr->ai_addrlen))
141 DEBUG ("mbmon: connect (%s, %s): %s", host, port,
142 sstrerror (errno, errbuf,
149 /* A socket could be opened and connecting succeeded. We're
154 freeaddrinfo (ai_list);
158 ERROR ("mbmon: Could not connect to daemon.");
162 /* receive data from the mbmon daemon */
163 memset (buffer, '\0', buffer_size);
166 while ((status = read (fd, buffer + buffer_fill, buffer_size - buffer_fill)) != 0)
172 if ((errno == EAGAIN) || (errno == EINTR))
175 ERROR ("mbmon: Error reading from socket: %s",
176 sstrerror (errno, errbuf,
181 buffer_fill += status;
183 if (buffer_fill >= buffer_size)
187 if (buffer_fill >= buffer_size)
189 buffer[buffer_size - 1] = '\0';
190 WARNING ("mbmon: Message from mbmon has been truncated.");
192 else if (buffer_fill == 0)
194 WARNING ("mbmon: Peer has unexpectedly shut down the socket. "
195 "Buffer: `%s'", buffer);
204 static int mbmon_config (const char *key, const char *value)
206 if (strcasecmp (key, "host") == 0)
208 if (mbmon_host != NULL)
210 mbmon_host = strdup (value);
212 else if (strcasecmp (key, "port") == 0)
214 if (mbmon_port != NULL)
216 mbmon_port = strdup (value);
226 static void mbmon_submit (const char *type, const char *type_instance,
230 value_list_t vl = VALUE_LIST_INIT;
232 values[0].gauge = value;
236 vl.time = time (NULL);
237 strcpy (vl.host, hostname_g);
238 strcpy (vl.plugin, "mbmon");
239 strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
241 plugin_dispatch_values (type, &vl);
242 } /* void mbmon_submit */
244 /* Trim trailing whitespace from a string. */
245 static void trim_spaces (char *s)
249 for (l = strlen (s) - 1; (l > 0) && isspace (s[l]); l--)
253 static int mbmon_read (void)
258 /* get data from daemon */
259 if (mbmon_query_daemon (buf, sizeof (buf)) < 0)
263 while ((t = strchr (s, ':')) != NULL)
274 value = strtod (t, &nextc);
275 if ((*nextc != '\n') && (*nextc != '\0'))
277 ERROR ("mbmon: value for `%s' contains invalid characters: `%s'", s, t);
281 if (strncmp (s, "TEMP", 4) == 0)
284 type = "temperature";
286 else if (strncmp (s, "FAN", 3) == 0)
291 else if (strncmp (s, "V", 1) == 0)
301 mbmon_submit (type, inst, value);
310 } /* void mbmon_read */
311 #endif /* MBMON_HAVE_READ */
314 Register collectd plugin. */
315 void module_register (void)
318 plugin_register_config ("mbmon", mbmon_config, config_keys, config_keys_num);
319 plugin_register_read ("mbmon", mbmon_read);
320 #endif /* MBMON_HAVE_READ */
321 } /* void module_register */