c32aa35827744f433fe6280854b3e658c5c170ff
1 /**
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
6 *
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.
11 *
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.
16 *
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
20 *
21 * Authors:
22 * Vincent Stehlé <vincent.stehle at free.fr>
23 * Florian octo Forster <octo at collectd.org>
24 * Sebastian Harl <sh at tokkee.org>
25 *
26 * TODO:
27 * Do a pass, some day, and spare some memory. We consume too much for now
28 * in string buffers and the like.
29 *
30 **/
32 #include "collectd.h"
33 #include "common.h"
34 #include "plugin.h"
35 #include "configfile.h"
37 # include <netdb.h>
38 # include <netinet/in.h>
39 # include <netinet/tcp.h>
40 # include <libgen.h> /* for basename */
42 #if HAVE_LINUX_MAJOR_H
43 # include <linux/major.h>
44 #endif
46 #define HDDTEMP_DEF_HOST "127.0.0.1"
47 #define HDDTEMP_DEF_PORT "7634"
49 static const char *config_keys[] =
50 {
51 "Host",
52 "Port"
53 };
54 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
56 static char *hddtemp_host = NULL;
57 static char hddtemp_port[16];
59 /*
60 * NAME
61 * hddtemp_query_daemon
62 *
63 * DESCRIPTION
64 * Connect to the hddtemp daemon and receive data.
65 *
66 * ARGUMENTS:
67 * `buffer' The buffer where we put the received ascii string.
68 * `buffer_size' Size of the buffer
69 *
70 * RETURN VALUE:
71 * >= 0 if ok, < 0 otherwise.
72 *
73 * NOTES:
74 * Example of possible strings, as received from daemon:
75 * |/dev/hda|ST340014A|36|C|
76 * |/dev/hda|ST380011A|46|C||/dev/hdd|ST340016A|SLP|*|
77 *
78 * FIXME:
79 * we need to create a new socket each time. Is there another way?
80 * Hm, maybe we can re-use the `sockaddr' structure? -octo
81 */
82 static int hddtemp_query_daemon (char *buffer, int buffer_size)
83 {
84 int fd;
85 ssize_t status;
86 int buffer_fill;
88 const char *host;
89 const char *port;
91 struct addrinfo ai_hints = { 0 };
92 struct addrinfo *ai_list, *ai_ptr;
93 int ai_return;
95 #ifdef AI_ADDRCONFIG
96 ai_hints.ai_flags |= AI_ADDRCONFIG;
97 #endif
98 ai_hints.ai_family = PF_UNSPEC;
99 ai_hints.ai_socktype = SOCK_STREAM;
100 ai_hints.ai_protocol = IPPROTO_TCP;
102 host = hddtemp_host;
103 if (host == NULL)
104 host = HDDTEMP_DEF_HOST;
106 port = hddtemp_port;
107 if (strlen (port) == 0)
108 port = HDDTEMP_DEF_PORT;
110 if ((ai_return = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
111 {
112 char errbuf[1024];
113 ERROR ("hddtemp plugin: getaddrinfo (%s, %s): %s",
114 host, port,
115 (ai_return == EAI_SYSTEM)
116 ? sstrerror (errno, errbuf, sizeof (errbuf))
117 : gai_strerror (ai_return));
118 return (-1);
119 }
121 fd = -1;
122 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
123 {
124 /* create our socket descriptor */
125 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
126 ai_ptr->ai_protocol);
127 if (fd < 0)
128 {
129 char errbuf[1024];
130 ERROR ("hddtemp plugin: socket: %s",
131 sstrerror (errno, errbuf, sizeof (errbuf)));
132 continue;
133 }
135 /* connect to the hddtemp daemon */
136 if (connect (fd, (struct sockaddr *) ai_ptr->ai_addr,
137 ai_ptr->ai_addrlen))
138 {
139 char errbuf[1024];
140 INFO ("hddtemp plugin: connect (%s, %s) failed: %s",
141 host, port,
142 sstrerror (errno, errbuf, sizeof (errbuf)));
143 close (fd);
144 fd = -1;
145 continue;
146 }
148 /* A socket could be opened and connecting succeeded. We're
149 * done. */
150 break;
151 }
153 freeaddrinfo (ai_list);
155 if (fd < 0)
156 {
157 ERROR ("hddtemp plugin: Could not connect to daemon.");
158 return (-1);
159 }
161 /* receive data from the hddtemp daemon */
162 memset (buffer, '\0', buffer_size);
164 buffer_fill = 0;
165 while ((status = read (fd, buffer + buffer_fill, buffer_size - buffer_fill)) != 0)
166 {
167 if (status == -1)
168 {
169 char errbuf[1024];
171 if ((errno == EAGAIN) || (errno == EINTR))
172 continue;
174 ERROR ("hddtemp plugin: Error reading from socket: %s",
175 sstrerror (errno, errbuf, sizeof (errbuf)));
176 close (fd);
177 return (-1);
178 }
179 buffer_fill += status;
181 if (buffer_fill >= buffer_size)
182 break;
183 }
185 if (buffer_fill >= buffer_size)
186 {
187 buffer[buffer_size - 1] = '\0';
188 WARNING ("hddtemp plugin: Message from hddtemp has been "
189 "truncated.");
190 }
191 else if (buffer_fill == 0)
192 {
193 WARNING ("hddtemp plugin: Peer has unexpectedly shut down "
194 "the socket. Buffer: `%s'", buffer);
195 close (fd);
196 return (-1);
197 }
199 close (fd);
200 return (0);
201 }
203 static int hddtemp_config (const char *key, const char *value)
204 {
205 if (strcasecmp (key, "Host") == 0)
206 {
207 if (hddtemp_host != NULL)
208 free (hddtemp_host);
209 hddtemp_host = strdup (value);
210 }
211 else if (strcasecmp (key, "Port") == 0)
212 {
213 int port = (int) (atof (value));
214 if ((port > 0) && (port <= 65535))
215 ssnprintf (hddtemp_port, sizeof (hddtemp_port),
216 "%i", port);
217 else
218 sstrncpy (hddtemp_port, value, sizeof (hddtemp_port));
219 }
220 else
221 {
222 return (-1);
223 }
225 return (0);
226 }
228 static void hddtemp_submit (char *type_instance, double value)
229 {
230 value_t values[1];
231 value_list_t vl = VALUE_LIST_INIT;
233 values[0].gauge = value;
235 vl.values = values;
236 vl.values_len = 1;
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);
243 }
245 static int hddtemp_read (void)
246 {
247 char buf[1024];
248 char *fields[128];
249 char *ptr;
250 char *saveptr;
251 int num_fields;
252 int num_disks;
253 int i;
255 /* get data from daemon */
256 if (hddtemp_query_daemon (buf, sizeof (buf)) < 0)
257 return (-1);
259 /* NB: strtok_r will eat up "||" and leading "|"'s */
260 num_fields = 0;
261 ptr = buf;
262 saveptr = NULL;
263 while ((fields[num_fields] = strtok_r (ptr, "|", &saveptr)) != NULL)
264 {
265 ptr = NULL;
266 num_fields++;
268 if (num_fields >= 128)
269 break;
270 }
272 num_disks = num_fields / 4;
274 for (i = 0; i < num_disks; i++)
275 {
276 char *name;
277 double temperature;
278 char *mode;
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')
285 continue;
287 temperature = atof (fields[4*i + 2]);
289 /* Convert farenheit to celsius */
290 if (mode[0] == 'F')
291 temperature = (temperature - 32.0) * 5.0 / 9.0;
293 hddtemp_submit (name, temperature);
294 }
296 return (0);
297 } /* int hddtemp_read */
299 /* module_register
300 Register collectd plugin. */
301 void module_register (void)
302 {
303 plugin_register_config ("hddtemp", hddtemp_config,
304 config_keys, config_keys_num);
305 plugin_register_read ("hddtemp", hddtemp_read);
306 }