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 #if HAVE_NETDB_H && HAVE_SYS_SOCKET_H && HAVE_NETINET_IN_H \
35 && HAVE_NETINET_TCP_H && HAVE_LIBGEN_H
36 # include <netdb.h>
37 # include <sys/socket.h>
38 # include <netinet/in.h>
39 # include <netinet/tcp.h>
40 # include <libgen.h> /* for basename */
41 # define HDDTEMP_HAVE_READ 1
42 #else
43 # define HDDTEMP_HAVE_READ 0
44 #endif
46 #if HAVE_LINUX_MAJOR_H
47 # include <linux/major.h>
48 #endif
50 #define HDDTEMP_DEF_HOST "127.0.0.1"
51 #define HDDTEMP_DEF_PORT "7634"
53 #if HDDTEMP_HAVE_READ
54 static const char *config_keys[] =
55 {
56 "Host",
57 "Port",
58 NULL
59 };
60 static int config_keys_num = 2;
62 typedef struct hddname
63 {
64 int major;
65 int minor;
66 char *name;
67 struct hddname *next;
68 } hddname_t;
70 static hddname_t *first_hddname = NULL;
71 static char *hddtemp_host = NULL;
72 static char *hddtemp_port = NULL;
74 /*
75 * NAME
76 * hddtemp_query_daemon
77 *
78 * DESCRIPTION
79 * Connect to the hddtemp daemon and receive data.
80 *
81 * ARGUMENTS:
82 * `buffer' The buffer where we put the received ascii string.
83 * `buffer_size' Size of the buffer
84 *
85 * RETURN VALUE:
86 * >= 0 if ok, < 0 otherwise.
87 *
88 * NOTES:
89 * Example of possible strings, as received from daemon:
90 * |/dev/hda|ST340014A|36|C|
91 * |/dev/hda|ST380011A|46|C||/dev/hdd|ST340016A|SLP|*|
92 *
93 * FIXME:
94 * we need to create a new socket each time. Is there another way?
95 * Hm, maybe we can re-use the `sockaddr' structure? -octo
96 */
97 static int hddtemp_query_daemon (char *buffer, int buffer_size)
98 {
99 int fd;
100 ssize_t status;
101 int buffer_fill;
103 const char *host;
104 const char *port;
106 struct addrinfo ai_hints;
107 struct addrinfo *ai_list, *ai_ptr;
108 int ai_return;
110 memset (&ai_hints, '\0', sizeof (ai_hints));
111 ai_hints.ai_flags = AI_ADDRCONFIG;
112 ai_hints.ai_family = PF_UNSPEC;
113 ai_hints.ai_socktype = SOCK_STREAM;
114 ai_hints.ai_protocol = IPPROTO_TCP;
116 host = hddtemp_host;
117 if (host == NULL)
118 host = HDDTEMP_DEF_HOST;
120 port = hddtemp_port;
121 if (port == NULL)
122 port = HDDTEMP_DEF_PORT;
124 if ((ai_return = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
125 {
126 char errbuf[1024];
127 ERROR ("hddtemp: getaddrinfo (%s, %s): %s",
128 host, port,
129 (ai_return == EAI_SYSTEM)
130 ? sstrerror (errno, errbuf, sizeof (errbuf))
131 : gai_strerror (ai_return));
132 return (-1);
133 }
135 fd = -1;
136 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
137 {
138 /* create our socket descriptor */
139 if ((fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol)) < 0)
140 {
141 char errbuf[1024];
142 ERROR ("hddtemp: socket: %s",
143 sstrerror (errno, errbuf, sizeof (errbuf)));
144 continue;
145 }
147 /* connect to the hddtemp daemon */
148 if (connect (fd, (struct sockaddr *) ai_ptr->ai_addr, ai_ptr->ai_addrlen))
149 {
150 char errbuf[1024];
151 DEBUG ("hddtemp: connect (%s, %s): %s", host, port,
152 sstrerror (errno, errbuf, sizeof (errbuf)));
153 close (fd);
154 fd = -1;
155 continue;
156 }
158 /* A socket could be opened and connecting succeeded. We're
159 * done. */
160 break;
161 }
163 freeaddrinfo (ai_list);
165 if (fd < 0)
166 {
167 ERROR ("hddtemp: Could not connect to daemon.");
168 return (-1);
169 }
171 /* receive data from the hddtemp daemon */
172 memset (buffer, '\0', buffer_size);
174 buffer_fill = 0;
175 while ((status = read (fd, buffer + buffer_fill, buffer_size - buffer_fill)) != 0)
176 {
177 if (status == -1)
178 {
179 char errbuf[1024];
181 if ((errno == EAGAIN) || (errno == EINTR))
182 continue;
184 ERROR ("hddtemp: Error reading from socket: %s",
185 sstrerror (errno, errbuf, sizeof (errbuf)));
186 close (fd);
187 return (-1);
188 }
189 buffer_fill += status;
191 if (buffer_fill >= buffer_size)
192 break;
193 }
195 if (buffer_fill >= buffer_size)
196 {
197 buffer[buffer_size - 1] = '\0';
198 WARNING ("hddtemp: Message from hddtemp has been truncated.");
199 }
200 else if (buffer_fill == 0)
201 {
202 WARNING ("hddtemp: Peer has unexpectedly shut down the socket. "
203 "Buffer: `%s'", buffer);
204 close (fd);
205 return (-1);
206 }
208 close (fd);
209 return (0);
210 }
212 static int hddtemp_config (const char *key, const char *value)
213 {
214 if (strcasecmp (key, "host") == 0)
215 {
216 if (hddtemp_host != NULL)
217 free (hddtemp_host);
218 hddtemp_host = strdup (value);
219 }
220 else if (strcasecmp (key, "port") == 0)
221 {
222 if (hddtemp_port != NULL)
223 free (hddtemp_port);
224 hddtemp_port = strdup (value);
225 }
226 else
227 {
228 return (-1);
229 }
231 return (0);
232 }
234 /* In the init-function we initialize the `hddname_t' list used to translate
235 * disk-names. Under Linux that's done using `/proc/partitions'. Under other
236 * operating-systems, it's not done at all. */
237 static int hddtemp_init (void)
238 {
239 #if KERNEL_LINUX
240 FILE *fh;
241 char buf[1024];
242 int buflen;
244 char *fields[16];
245 int num_fields;
247 int major;
248 int minor;
249 char *name;
250 hddname_t *next;
251 hddname_t *entry;
253 next = first_hddname;
254 while (next != NULL)
255 {
256 entry = next;
257 next = entry->next;
259 free (entry->name);
260 free (entry);
261 }
262 first_hddname = NULL;
264 if ((fh = fopen ("/proc/partitions", "r")) != NULL)
265 {
266 DEBUG ("Looking at /proc/partitions...");
268 while (fgets (buf, sizeof (buf), fh) != NULL)
269 {
270 /* Delete trailing newlines */
271 buflen = strlen (buf);
273 while ((buflen > 0) && ((buf[buflen-1] == '\n') || (buf[buflen-1] == '\r')))
274 buf[--buflen] = '\0';
276 /* We want lines of the form:
277 *
278 * 3 1 77842926 hda1
279 *
280 * ...so, skip everything else. */
281 if (buflen == 0)
282 continue;
284 num_fields = strsplit (buf, fields, 16);
286 if (num_fields != 4)
287 continue;
289 major = atoi (fields[0]);
290 minor = atoi (fields[1]);
292 /* We try to keep only entries, which may correspond to
293 * physical disks and that may have a corresponding
294 * entry in the hddtemp daemon. Basically, this means
295 * IDE and SCSI. */
296 switch (major)
297 {
298 /* SCSI. */
299 case SCSI_DISK0_MAJOR:
300 case SCSI_DISK1_MAJOR:
301 case SCSI_DISK2_MAJOR:
302 case SCSI_DISK3_MAJOR:
303 case SCSI_DISK4_MAJOR:
304 case SCSI_DISK5_MAJOR:
305 case SCSI_DISK6_MAJOR:
306 case SCSI_DISK7_MAJOR:
307 case SCSI_DISK8_MAJOR:
308 case SCSI_DISK9_MAJOR:
309 case SCSI_DISK10_MAJOR:
310 case SCSI_DISK11_MAJOR:
311 case SCSI_DISK12_MAJOR:
312 case SCSI_DISK13_MAJOR:
313 case SCSI_DISK14_MAJOR:
314 case SCSI_DISK15_MAJOR:
315 /* SCSI disks minors are multiples of 16.
316 * Keep only those. */
317 if (minor % 16)
318 continue;
319 break;
321 /* IDE. */
322 case IDE0_MAJOR:
323 case IDE1_MAJOR:
324 case IDE2_MAJOR:
325 case IDE3_MAJOR:
326 case IDE4_MAJOR:
327 case IDE5_MAJOR:
328 case IDE6_MAJOR:
329 case IDE7_MAJOR:
330 case IDE8_MAJOR:
331 case IDE9_MAJOR:
332 /* IDE disks minors can only be 0 or 64.
333 * Keep only those. */
334 if(minor != 0 && minor != 64)
335 continue;
336 break;
338 /* Skip all other majors. */
339 default:
340 DEBUG ("Skipping unknown major %i", major);
341 continue;
342 } /* switch (major) */
344 if ((name = strdup (fields[3])) == NULL)
345 {
346 ERROR ("hddtemp: strdup(%s) == NULL", fields[3]);
347 continue;
348 }
350 if ((entry = (hddname_t *) malloc (sizeof (hddname_t))) == NULL)
351 {
352 ERROR ("hddtemp: malloc (%u) == NULL",
353 (unsigned int) sizeof (hddname_t));
354 free (name);
355 continue;
356 }
358 DEBUG ("Found disk: %s (%u:%u).", name, major, minor);
360 entry->major = major;
361 entry->minor = minor;
362 entry->name = name;
363 entry->next = NULL;
365 if (first_hddname == NULL)
366 {
367 first_hddname = entry;
368 }
369 else
370 {
371 entry->next = first_hddname;
372 first_hddname = entry;
373 }
374 }
375 fclose (fh);
376 }
377 #if COLLECT_DEBUG
378 else
379 {
380 char errbuf[1024];
381 DEBUG ("Could not open /proc/partitions: %s",
382 sstrerror (errno, errbuf, sizeof (errbuf)));
383 }
384 #endif /* COLLECT_DEBUG */
385 #endif /* KERNEL_LINUX */
387 return (0);
388 } /* int hddtemp_init */
390 /*
391 * hddtemp_get_name
392 *
393 * Description:
394 * Try to "cook" a bit the drive name as returned
395 * by the hddtemp daemon. The intend is to transform disk
396 * names into <major>-<minor> when possible.
397 */
398 static char *hddtemp_get_name (char *drive)
399 {
400 hddname_t *list;
401 char *ret;
403 for (list = first_hddname; list != NULL; list = list->next)
404 if (strcmp (drive, list->name) == 0)
405 break;
407 if (list == NULL)
408 {
409 DEBUG ("Don't know %s, keeping name as-is.", drive);
410 return (strdup (drive));
411 }
413 if ((ret = (char *) malloc (128 * sizeof (char))) == NULL)
414 return (NULL);
416 if (snprintf (ret, 128, "%i-%i", list->major, list->minor) >= 128)
417 {
418 free (ret);
419 return (NULL);
420 }
422 return (ret);
423 }
425 static void hddtemp_submit (char *type_instance, double value)
426 {
427 value_t values[1];
428 value_list_t vl = VALUE_LIST_INIT;
430 values[0].gauge = value;
432 vl.values = values;
433 vl.values_len = 1;
434 vl.time = time (NULL);
435 strcpy (vl.host, hostname_g);
436 strcpy (vl.plugin, "hddtemp");
437 strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
439 plugin_dispatch_values ("temperature", &vl);
440 }
442 static int hddtemp_read (void)
443 {
444 char buf[1024];
445 char *fields[128];
446 char *ptr;
447 char *saveptr;
448 int num_fields;
449 int num_disks;
450 int i;
452 /* get data from daemon */
453 if (hddtemp_query_daemon (buf, sizeof (buf)) < 0)
454 return (-1);
456 /* NB: strtok_r will eat up "||" and leading "|"'s */
457 num_fields = 0;
458 ptr = buf;
459 saveptr = NULL;
460 while ((fields[num_fields] = strtok_r (ptr, "|", &saveptr)) != NULL)
461 {
462 ptr = NULL;
463 num_fields++;
465 if (num_fields >= 128)
466 break;
467 }
469 num_disks = num_fields / 4;
471 for (i = 0; i < num_disks; i++)
472 {
473 char *name, *submit_name;
474 double temperature;
475 char *mode;
477 mode = fields[4*i + 3];
478 name = basename (fields[4*i + 0]);
480 /* Skip non-temperature information */
481 if (mode[0] != 'C' && mode[0] != 'F')
482 continue;
484 temperature = atof (fields[4*i + 2]);
486 /* Convert farenheit to celsius */
487 if (mode[0] == 'F')
488 temperature = (temperature - 32.0) * 5.0 / 9.0;
490 if ((submit_name = hddtemp_get_name (name)) != NULL)
491 {
492 hddtemp_submit (submit_name, temperature);
493 free (submit_name);
494 }
495 else
496 {
497 hddtemp_submit (name, temperature);
498 }
499 }
501 return (0);
502 } /* int hddtemp_read */
503 #endif /* HDDTEMP_HAVE_READ */
505 /* module_register
506 Register collectd plugin. */
507 void module_register (void)
508 {
509 #if HDDTEMP_HAVE_READ
510 plugin_register_config ("hddtemp", hddtemp_config,
511 config_keys, config_keys_num);
512 plugin_register_init ("hddtemp", hddtemp_init);
513 plugin_register_read ("hddtemp", hddtemp_read);
514 #endif /* HDDTEMP_HAVE_READ */
515 }