1 /**
2 * collectd - src/hddtemp.c
3 * Copyright (C) 2005,2006 Vincent Stehlé
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Vincent Stehlé <vincent.stehle at free.fr>
21 * Florian octo Forster <octo at verplant.org>
22 *
23 * TODO:
24 * Do a pass, some day, and spare some memory. We consume too much for now
25 * in string buffers and the like.
26 *
27 **/
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
32 #include "configfile.h"
34 # include <netdb.h>
35 # include <sys/socket.h>
36 # include <netinet/in.h>
37 # include <netinet/tcp.h>
38 # include <libgen.h> /* for basename */
40 #if HAVE_LINUX_MAJOR_H
41 # include <linux/major.h>
42 #endif
44 #define HDDTEMP_DEF_HOST "127.0.0.1"
45 #define HDDTEMP_DEF_PORT "7634"
47 static const char *config_keys[] =
48 {
49 "Host",
50 "Port",
51 "TranslateDevicename"
52 };
53 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
55 typedef struct hddname
56 {
57 int major;
58 int minor;
59 char *name;
60 struct hddname *next;
61 } hddname_t;
63 static hddname_t *first_hddname = NULL;
64 static char *hddtemp_host = NULL;
65 static char hddtemp_port[16];
66 static int translate_devicename = 1;
68 /*
69 * NAME
70 * hddtemp_query_daemon
71 *
72 * DESCRIPTION
73 * Connect to the hddtemp daemon and receive data.
74 *
75 * ARGUMENTS:
76 * `buffer' The buffer where we put the received ascii string.
77 * `buffer_size' Size of the buffer
78 *
79 * RETURN VALUE:
80 * >= 0 if ok, < 0 otherwise.
81 *
82 * NOTES:
83 * Example of possible strings, as received from daemon:
84 * |/dev/hda|ST340014A|36|C|
85 * |/dev/hda|ST380011A|46|C||/dev/hdd|ST340016A|SLP|*|
86 *
87 * FIXME:
88 * we need to create a new socket each time. Is there another way?
89 * Hm, maybe we can re-use the `sockaddr' structure? -octo
90 */
91 static int hddtemp_query_daemon (char *buffer, int buffer_size)
92 {
93 int fd;
94 ssize_t status;
95 int buffer_fill;
97 const char *host;
98 const char *port;
100 struct addrinfo ai_hints;
101 struct addrinfo *ai_list, *ai_ptr;
102 int ai_return;
104 memset (&ai_hints, '\0', sizeof (ai_hints));
105 ai_hints.ai_flags = 0;
106 #ifdef AI_ADDRCONFIG
107 ai_hints.ai_flags |= AI_ADDRCONFIG;
108 #endif
109 ai_hints.ai_family = PF_UNSPEC;
110 ai_hints.ai_socktype = SOCK_STREAM;
111 ai_hints.ai_protocol = IPPROTO_TCP;
113 host = hddtemp_host;
114 if (host == NULL)
115 host = HDDTEMP_DEF_HOST;
117 port = hddtemp_port;
118 if (strlen (port) == 0)
119 port = HDDTEMP_DEF_PORT;
121 if ((ai_return = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
122 {
123 char errbuf[1024];
124 ERROR ("hddtemp plugin: getaddrinfo (%s, %s): %s",
125 host, port,
126 (ai_return == EAI_SYSTEM)
127 ? sstrerror (errno, errbuf, sizeof (errbuf))
128 : gai_strerror (ai_return));
129 return (-1);
130 }
132 fd = -1;
133 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
134 {
135 /* create our socket descriptor */
136 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
137 ai_ptr->ai_protocol);
138 if (fd < 0)
139 {
140 char errbuf[1024];
141 ERROR ("hddtemp plugin: socket: %s",
142 sstrerror (errno, errbuf, sizeof (errbuf)));
143 continue;
144 }
146 /* connect to the hddtemp daemon */
147 if (connect (fd, (struct sockaddr *) ai_ptr->ai_addr,
148 ai_ptr->ai_addrlen))
149 {
150 char errbuf[1024];
151 INFO ("hddtemp plugin: connect (%s, %s) failed: %s",
152 host, port,
153 sstrerror (errno, errbuf, sizeof (errbuf)));
154 close (fd);
155 fd = -1;
156 continue;
157 }
159 /* A socket could be opened and connecting succeeded. We're
160 * done. */
161 break;
162 }
164 freeaddrinfo (ai_list);
166 if (fd < 0)
167 {
168 ERROR ("hddtemp plugin: Could not connect to daemon.");
169 return (-1);
170 }
172 /* receive data from the hddtemp daemon */
173 memset (buffer, '\0', buffer_size);
175 buffer_fill = 0;
176 while ((status = read (fd, buffer + buffer_fill, buffer_size - buffer_fill)) != 0)
177 {
178 if (status == -1)
179 {
180 char errbuf[1024];
182 if ((errno == EAGAIN) || (errno == EINTR))
183 continue;
185 ERROR ("hddtemp plugin: Error reading from socket: %s",
186 sstrerror (errno, errbuf, sizeof (errbuf)));
187 close (fd);
188 return (-1);
189 }
190 buffer_fill += status;
192 if (buffer_fill >= buffer_size)
193 break;
194 }
196 if (buffer_fill >= buffer_size)
197 {
198 buffer[buffer_size - 1] = '\0';
199 WARNING ("hddtemp plugin: Message from hddtemp has been "
200 "truncated.");
201 }
202 else if (buffer_fill == 0)
203 {
204 WARNING ("hddtemp plugin: Peer has unexpectedly shut down "
205 "the socket. Buffer: `%s'", buffer);
206 close (fd);
207 return (-1);
208 }
210 close (fd);
211 return (0);
212 }
214 static int hddtemp_config (const char *key, const char *value)
215 {
216 if (strcasecmp (key, "Host") == 0)
217 {
218 if (hddtemp_host != NULL)
219 free (hddtemp_host);
220 hddtemp_host = strdup (value);
221 }
222 else if (strcasecmp (key, "Port") == 0)
223 {
224 int port = (int) (atof (value));
225 if ((port > 0) && (port <= 65535))
226 ssnprintf (hddtemp_port, sizeof (hddtemp_port),
227 "%i", port);
228 else
229 sstrncpy (hddtemp_port, value, sizeof (hddtemp_port));
230 }
231 else if (strcasecmp (key, "TranslateDevicename") == 0)
232 {
233 if ((strcasecmp ("true", value) == 0)
234 || (strcasecmp ("yes", value) == 0)
235 || (strcasecmp ("on", value) == 0))
236 translate_devicename = 1;
237 else
238 translate_devicename = 0;
239 }
240 else
241 {
242 return (-1);
243 }
245 return (0);
246 }
248 /* In the init-function we initialize the `hddname_t' list used to translate
249 * disk-names. Under Linux that's done using `/proc/partitions'. Under other
250 * operating-systems, it's not done at all. */
251 static int hddtemp_init (void)
252 {
253 #if KERNEL_LINUX
254 FILE *fh;
255 char buf[1024];
256 int buflen;
258 char *fields[16];
259 int num_fields;
261 int major;
262 int minor;
263 char *name;
264 hddname_t *next;
265 hddname_t *entry;
267 next = first_hddname;
268 while (next != NULL)
269 {
270 entry = next;
271 next = entry->next;
273 free (entry->name);
274 free (entry);
275 }
276 first_hddname = NULL;
278 if ((fh = fopen ("/proc/partitions", "r")) != NULL)
279 {
280 DEBUG ("hddtemp plugin: Looking at /proc/partitions...");
282 while (fgets (buf, sizeof (buf), fh) != NULL)
283 {
284 /* Delete trailing newlines */
285 buflen = strlen (buf);
287 while ((buflen > 0) && ((buf[buflen-1] == '\n') || (buf[buflen-1] == '\r')))
288 buf[--buflen] = '\0';
290 /* We want lines of the form:
291 *
292 * 3 1 77842926 hda1
293 *
294 * ...so, skip everything else. */
295 if (buflen == 0)
296 continue;
298 num_fields = strsplit (buf, fields, 16);
300 if (num_fields != 4)
301 continue;
303 major = atoi (fields[0]);
304 minor = atoi (fields[1]);
306 /* We try to keep only entries, which may correspond to
307 * physical disks and that may have a corresponding
308 * entry in the hddtemp daemon. Basically, this means
309 * IDE and SCSI. */
310 switch (major)
311 {
312 /* SCSI. */
313 case SCSI_DISK0_MAJOR:
314 case SCSI_DISK1_MAJOR:
315 case SCSI_DISK2_MAJOR:
316 case SCSI_DISK3_MAJOR:
317 case SCSI_DISK4_MAJOR:
318 case SCSI_DISK5_MAJOR:
319 case SCSI_DISK6_MAJOR:
320 case SCSI_DISK7_MAJOR:
321 #ifdef SCSI_DISK8_MAJOR
322 case SCSI_DISK8_MAJOR:
323 case SCSI_DISK9_MAJOR:
324 case SCSI_DISK10_MAJOR:
325 case SCSI_DISK11_MAJOR:
326 case SCSI_DISK12_MAJOR:
327 case SCSI_DISK13_MAJOR:
328 case SCSI_DISK14_MAJOR:
329 case SCSI_DISK15_MAJOR:
330 #endif /* SCSI_DISK8_MAJOR */
331 /* SCSI disks minors are multiples of 16.
332 * Keep only those. */
333 if (minor % 16)
334 continue;
335 break;
337 /* IDE. */
338 case IDE0_MAJOR:
339 case IDE1_MAJOR:
340 case IDE2_MAJOR:
341 case IDE3_MAJOR:
342 case IDE4_MAJOR:
343 case IDE5_MAJOR:
344 case IDE6_MAJOR:
345 case IDE7_MAJOR:
346 case IDE8_MAJOR:
347 case IDE9_MAJOR:
348 /* IDE disks minors can only be 0 or 64.
349 * Keep only those. */
350 if(minor != 0 && minor != 64)
351 continue;
352 break;
354 /* Skip all other majors. */
355 default:
356 DEBUG ("hddtemp plugin: Skipping unknown major %i", major);
357 continue;
358 } /* switch (major) */
360 if ((name = strdup (fields[3])) == NULL)
361 {
362 ERROR ("hddtemp plugin: strdup(%s) == NULL", fields[3]);
363 continue;
364 }
366 if ((entry = (hddname_t *) malloc (sizeof (hddname_t))) == NULL)
367 {
368 ERROR ("hddtemp plugin: malloc (%u) == NULL",
369 (unsigned int) sizeof (hddname_t));
370 free (name);
371 continue;
372 }
374 DEBUG ("hddtemp plugin: Found disk: %s (%u:%u).", name, major, minor);
376 entry->major = major;
377 entry->minor = minor;
378 entry->name = name;
379 entry->next = NULL;
381 if (first_hddname == NULL)
382 {
383 first_hddname = entry;
384 }
385 else
386 {
387 entry->next = first_hddname;
388 first_hddname = entry;
389 }
390 }
391 fclose (fh);
392 }
393 #if COLLECT_DEBUG
394 else
395 {
396 char errbuf[1024];
397 DEBUG ("hddtemp plugin: Could not open /proc/partitions: %s",
398 sstrerror (errno, errbuf, sizeof (errbuf)));
399 }
400 #endif /* COLLECT_DEBUG */
401 #endif /* KERNEL_LINUX */
403 return (0);
404 } /* int hddtemp_init */
406 /*
407 * hddtemp_get_major_minor
408 *
409 * Description:
410 * Try to "cook" a bit the drive name as returned
411 * by the hddtemp daemon. The intend is to transform disk
412 * names into <major>-<minor> when possible.
413 */
414 static char *hddtemp_get_major_minor (char *drive)
415 {
416 hddname_t *list;
417 char *ret;
419 for (list = first_hddname; list != NULL; list = list->next)
420 if (strcmp (drive, list->name) == 0)
421 break;
423 if (list == NULL)
424 {
425 DEBUG ("hddtemp plugin: Don't know %s, keeping name as-is.", drive);
426 return (strdup (drive));
427 }
429 if ((ret = (char *) malloc (128 * sizeof (char))) == NULL)
430 return (NULL);
432 if (ssnprintf (ret, 128, "%i-%i", list->major, list->minor) >= 128)
433 {
434 free (ret);
435 return (NULL);
436 }
438 return (ret);
439 }
441 static void hddtemp_submit (char *type_instance, double value)
442 {
443 value_t values[1];
444 value_list_t vl = VALUE_LIST_INIT;
446 values[0].gauge = value;
448 vl.values = values;
449 vl.values_len = 1;
450 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
451 sstrncpy (vl.plugin, "hddtemp", sizeof (vl.plugin));
452 sstrncpy (vl.type, "temperature", sizeof (vl.type));
453 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
455 plugin_dispatch_values (&vl);
456 }
458 static int hddtemp_read (void)
459 {
460 char buf[1024];
461 char *fields[128];
462 char *ptr;
463 char *saveptr;
464 int num_fields;
465 int num_disks;
466 int i;
468 /* get data from daemon */
469 if (hddtemp_query_daemon (buf, sizeof (buf)) < 0)
470 return (-1);
472 /* NB: strtok_r will eat up "||" and leading "|"'s */
473 num_fields = 0;
474 ptr = buf;
475 saveptr = NULL;
476 while ((fields[num_fields] = strtok_r (ptr, "|", &saveptr)) != NULL)
477 {
478 ptr = NULL;
479 num_fields++;
481 if (num_fields >= 128)
482 break;
483 }
485 num_disks = num_fields / 4;
487 for (i = 0; i < num_disks; i++)
488 {
489 char *name, *major_minor;
490 double temperature;
491 char *mode;
493 mode = fields[4*i + 3];
494 name = basename (fields[4*i + 0]);
496 /* Skip non-temperature information */
497 if (mode[0] != 'C' && mode[0] != 'F')
498 continue;
500 temperature = atof (fields[4*i + 2]);
502 /* Convert farenheit to celsius */
503 if (mode[0] == 'F')
504 temperature = (temperature - 32.0) * 5.0 / 9.0;
506 if (translate_devicename
507 && (major_minor = hddtemp_get_major_minor (name)) != NULL)
508 {
509 hddtemp_submit (major_minor, temperature);
510 free (major_minor);
511 }
512 else
513 {
514 hddtemp_submit (name, temperature);
515 }
516 }
518 return (0);
519 } /* int hddtemp_read */
521 /* module_register
522 Register collectd plugin. */
523 void module_register (void)
524 {
525 plugin_register_config ("hddtemp", hddtemp_config,
526 config_keys, config_keys_num);
527 plugin_register_init ("hddtemp", hddtemp_init);
528 plugin_register_read ("hddtemp", hddtemp_read);
529 }