2 * collectd - src/hddtemp.c
3 * Copyright (C) 2005,2006 Vincent Stehlé
4 * Copyright (C) 2006-2010 Florian octo Forster
5 * Copyright (C) 2008 Sebastian Harl
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * Vincent Stehlé <vincent.stehle at free.fr>
23 * Florian octo Forster <octo at collectd.org>
24 * Sebastian Harl <sh at tokkee.org>
27 * Do a pass, some day, and spare some memory. We consume too much for now
28 * in string buffers and the like.
36 #include "configfile.h"
39 # include <netinet/in.h>
40 # include <netinet/tcp.h>
41 # include <libgen.h> /* for basename */
43 #if HAVE_LINUX_MAJOR_H
44 # include <linux/major.h>
47 #define HDDTEMP_DEF_HOST "127.0.0.1"
48 #define HDDTEMP_DEF_PORT "7634"
50 static const char *config_keys[] =
55 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
57 static char *hddtemp_host = NULL;
58 static char hddtemp_port[16];
62 * hddtemp_query_daemon
65 * Connect to the hddtemp daemon and receive data.
68 * `buffer' The buffer where we put the received ascii string.
69 * `buffer_size' Size of the buffer
72 * >= 0 if ok, < 0 otherwise.
75 * Example of possible strings, as received from daemon:
76 * |/dev/hda|ST340014A|36|C|
77 * |/dev/hda|ST380011A|46|C||/dev/hdd|ST340016A|SLP|*|
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 hddtemp_query_daemon (char *buffer, int buffer_size)
92 struct addrinfo *ai_list, *ai_ptr;
97 host = HDDTEMP_DEF_HOST;
100 if (strlen (port) == 0)
101 port = HDDTEMP_DEF_PORT;
103 struct addrinfo ai_hints = {
104 .ai_flags = AI_ADDRCONFIG,
105 .ai_family = AF_UNSPEC,
106 .ai_protocol = IPPROTO_TCP,
107 .ai_socktype = SOCK_STREAM
110 if ((ai_return = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
113 ERROR ("hddtemp plugin: getaddrinfo (%s, %s): %s",
115 (ai_return == EAI_SYSTEM)
116 ? sstrerror (errno, errbuf, sizeof (errbuf))
117 : gai_strerror (ai_return));
122 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
124 /* create our socket descriptor */
125 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
126 ai_ptr->ai_protocol);
130 ERROR ("hddtemp plugin: socket: %s",
131 sstrerror (errno, errbuf, sizeof (errbuf)));
135 /* connect to the hddtemp daemon */
136 if (connect (fd, (struct sockaddr *) ai_ptr->ai_addr,
140 INFO ("hddtemp plugin: connect (%s, %s) failed: %s",
142 sstrerror (errno, errbuf, sizeof (errbuf)));
148 /* A socket could be opened and connecting succeeded. We're
153 freeaddrinfo (ai_list);
157 ERROR ("hddtemp plugin: Could not connect to daemon.");
161 /* receive data from the hddtemp daemon */
162 memset (buffer, '\0', buffer_size);
165 while ((status = read (fd, buffer + buffer_fill, buffer_size - buffer_fill)) != 0)
171 if ((errno == EAGAIN) || (errno == EINTR))
174 ERROR ("hddtemp plugin: Error reading from socket: %s",
175 sstrerror (errno, errbuf, sizeof (errbuf)));
179 buffer_fill += status;
181 if (buffer_fill >= buffer_size)
185 if (buffer_fill >= buffer_size)
187 buffer[buffer_size - 1] = '\0';
188 WARNING ("hddtemp plugin: Message from hddtemp has been "
191 else if (buffer_fill == 0)
193 WARNING ("hddtemp plugin: Peer has unexpectedly shut down "
194 "the socket. Buffer: `%s'", buffer);
203 static int hddtemp_config (const char *key, const char *value)
205 if (strcasecmp (key, "Host") == 0)
207 if (hddtemp_host != NULL)
209 hddtemp_host = strdup (value);
211 else if (strcasecmp (key, "Port") == 0)
213 int port = (int) (atof (value));
214 if ((port > 0) && (port <= 65535))
215 ssnprintf (hddtemp_port, sizeof (hddtemp_port),
218 sstrncpy (hddtemp_port, value, sizeof (hddtemp_port));
228 static void hddtemp_submit (char *type_instance, double value)
231 value_list_t vl = VALUE_LIST_INIT;
233 values[0].gauge = value;
237 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
238 sstrncpy (vl.plugin, "hddtemp", sizeof (vl.plugin));
239 sstrncpy (vl.type, "temperature", sizeof (vl.type));
240 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
242 plugin_dispatch_values (&vl);
245 static int hddtemp_read (void)
255 /* get data from daemon */
256 if (hddtemp_query_daemon (buf, sizeof (buf)) < 0)
259 /* NB: strtok_r will eat up "||" and leading "|"'s */
263 while ((fields[num_fields] = strtok_r (ptr, "|", &saveptr)) != NULL)
268 if (num_fields >= 128)
272 num_disks = num_fields / 4;
274 for (i = 0; i < num_disks; i++)
280 mode = fields[4*i + 3];
281 name = basename (fields[4*i + 0]);
283 /* Skip non-temperature information */
284 if (mode[0] != 'C' && mode[0] != 'F')
287 temperature = atof (fields[4*i + 2]);
289 /* Convert farenheit to celsius */
291 temperature = (temperature - 32.0) * 5.0 / 9.0;
293 hddtemp_submit (name, temperature);
297 } /* int hddtemp_read */
300 Register collectd plugin. */
301 void module_register (void)
303 plugin_register_config ("hddtemp", hddtemp_config,
304 config_keys, config_keys_num);
305 plugin_register_read ("hddtemp", hddtemp_read);