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[16];
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 (strlen (port) == 0)
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 int port = (int) (atof (value));
223 if ((port > 0) && (port <= 65535))
224 snprintf (hddtemp_port, sizeof (hddtemp_port),
225 "%i", port);
226 else
227 strncpy (hddtemp_port, value, sizeof (hddtemp_port));
228 hddtemp_port[sizeof (hddtemp_port) - 1] = '\0';
229 }
230 else
231 {
232 return (-1);
233 }
235 return (0);
236 }
238 /* In the init-function we initialize the `hddname_t' list used to translate
239 * disk-names. Under Linux that's done using `/proc/partitions'. Under other
240 * operating-systems, it's not done at all. */
241 static int hddtemp_init (void)
242 {
243 #if KERNEL_LINUX
244 FILE *fh;
245 char buf[1024];
246 int buflen;
248 char *fields[16];
249 int num_fields;
251 int major;
252 int minor;
253 char *name;
254 hddname_t *next;
255 hddname_t *entry;
257 next = first_hddname;
258 while (next != NULL)
259 {
260 entry = next;
261 next = entry->next;
263 free (entry->name);
264 free (entry);
265 }
266 first_hddname = NULL;
268 if ((fh = fopen ("/proc/partitions", "r")) != NULL)
269 {
270 DEBUG ("Looking at /proc/partitions...");
272 while (fgets (buf, sizeof (buf), fh) != NULL)
273 {
274 /* Delete trailing newlines */
275 buflen = strlen (buf);
277 while ((buflen > 0) && ((buf[buflen-1] == '\n') || (buf[buflen-1] == '\r')))
278 buf[--buflen] = '\0';
280 /* We want lines of the form:
281 *
282 * 3 1 77842926 hda1
283 *
284 * ...so, skip everything else. */
285 if (buflen == 0)
286 continue;
288 num_fields = strsplit (buf, fields, 16);
290 if (num_fields != 4)
291 continue;
293 major = atoi (fields[0]);
294 minor = atoi (fields[1]);
296 /* We try to keep only entries, which may correspond to
297 * physical disks and that may have a corresponding
298 * entry in the hddtemp daemon. Basically, this means
299 * IDE and SCSI. */
300 switch (major)
301 {
302 /* SCSI. */
303 case SCSI_DISK0_MAJOR:
304 case SCSI_DISK1_MAJOR:
305 case SCSI_DISK2_MAJOR:
306 case SCSI_DISK3_MAJOR:
307 case SCSI_DISK4_MAJOR:
308 case SCSI_DISK5_MAJOR:
309 case SCSI_DISK6_MAJOR:
310 case SCSI_DISK7_MAJOR:
311 case SCSI_DISK8_MAJOR:
312 case SCSI_DISK9_MAJOR:
313 case SCSI_DISK10_MAJOR:
314 case SCSI_DISK11_MAJOR:
315 case SCSI_DISK12_MAJOR:
316 case SCSI_DISK13_MAJOR:
317 case SCSI_DISK14_MAJOR:
318 case SCSI_DISK15_MAJOR:
319 /* SCSI disks minors are multiples of 16.
320 * Keep only those. */
321 if (minor % 16)
322 continue;
323 break;
325 /* IDE. */
326 case IDE0_MAJOR:
327 case IDE1_MAJOR:
328 case IDE2_MAJOR:
329 case IDE3_MAJOR:
330 case IDE4_MAJOR:
331 case IDE5_MAJOR:
332 case IDE6_MAJOR:
333 case IDE7_MAJOR:
334 case IDE8_MAJOR:
335 case IDE9_MAJOR:
336 /* IDE disks minors can only be 0 or 64.
337 * Keep only those. */
338 if(minor != 0 && minor != 64)
339 continue;
340 break;
342 /* Skip all other majors. */
343 default:
344 DEBUG ("Skipping unknown major %i", major);
345 continue;
346 } /* switch (major) */
348 if ((name = strdup (fields[3])) == NULL)
349 {
350 ERROR ("hddtemp: strdup(%s) == NULL", fields[3]);
351 continue;
352 }
354 if ((entry = (hddname_t *) malloc (sizeof (hddname_t))) == NULL)
355 {
356 ERROR ("hddtemp: malloc (%u) == NULL",
357 (unsigned int) sizeof (hddname_t));
358 free (name);
359 continue;
360 }
362 DEBUG ("Found disk: %s (%u:%u).", name, major, minor);
364 entry->major = major;
365 entry->minor = minor;
366 entry->name = name;
367 entry->next = NULL;
369 if (first_hddname == NULL)
370 {
371 first_hddname = entry;
372 }
373 else
374 {
375 entry->next = first_hddname;
376 first_hddname = entry;
377 }
378 }
379 fclose (fh);
380 }
381 #if COLLECT_DEBUG
382 else
383 {
384 char errbuf[1024];
385 DEBUG ("Could not open /proc/partitions: %s",
386 sstrerror (errno, errbuf, sizeof (errbuf)));
387 }
388 #endif /* COLLECT_DEBUG */
389 #endif /* KERNEL_LINUX */
391 return (0);
392 } /* int hddtemp_init */
394 /*
395 * hddtemp_get_name
396 *
397 * Description:
398 * Try to "cook" a bit the drive name as returned
399 * by the hddtemp daemon. The intend is to transform disk
400 * names into <major>-<minor> when possible.
401 */
402 static char *hddtemp_get_name (char *drive)
403 {
404 hddname_t *list;
405 char *ret;
407 for (list = first_hddname; list != NULL; list = list->next)
408 if (strcmp (drive, list->name) == 0)
409 break;
411 if (list == NULL)
412 {
413 DEBUG ("Don't know %s, keeping name as-is.", drive);
414 return (strdup (drive));
415 }
417 if ((ret = (char *) malloc (128 * sizeof (char))) == NULL)
418 return (NULL);
420 if (snprintf (ret, 128, "%i-%i", list->major, list->minor) >= 128)
421 {
422 free (ret);
423 return (NULL);
424 }
426 return (ret);
427 }
429 static void hddtemp_submit (char *type_instance, double value)
430 {
431 value_t values[1];
432 value_list_t vl = VALUE_LIST_INIT;
434 values[0].gauge = value;
436 vl.values = values;
437 vl.values_len = 1;
438 vl.time = time (NULL);
439 strcpy (vl.host, hostname_g);
440 strcpy (vl.plugin, "hddtemp");
441 strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
443 plugin_dispatch_values ("temperature", &vl);
444 }
446 static int hddtemp_read (void)
447 {
448 char buf[1024];
449 char *fields[128];
450 char *ptr;
451 char *saveptr;
452 int num_fields;
453 int num_disks;
454 int i;
456 /* get data from daemon */
457 if (hddtemp_query_daemon (buf, sizeof (buf)) < 0)
458 return (-1);
460 /* NB: strtok_r will eat up "||" and leading "|"'s */
461 num_fields = 0;
462 ptr = buf;
463 saveptr = NULL;
464 while ((fields[num_fields] = strtok_r (ptr, "|", &saveptr)) != NULL)
465 {
466 ptr = NULL;
467 num_fields++;
469 if (num_fields >= 128)
470 break;
471 }
473 num_disks = num_fields / 4;
475 for (i = 0; i < num_disks; i++)
476 {
477 char *name, *submit_name;
478 double temperature;
479 char *mode;
481 mode = fields[4*i + 3];
482 name = basename (fields[4*i + 0]);
484 /* Skip non-temperature information */
485 if (mode[0] != 'C' && mode[0] != 'F')
486 continue;
488 temperature = atof (fields[4*i + 2]);
490 /* Convert farenheit to celsius */
491 if (mode[0] == 'F')
492 temperature = (temperature - 32.0) * 5.0 / 9.0;
494 if ((submit_name = hddtemp_get_name (name)) != NULL)
495 {
496 hddtemp_submit (submit_name, temperature);
497 free (submit_name);
498 }
499 else
500 {
501 hddtemp_submit (name, temperature);
502 }
503 }
505 return (0);
506 } /* int hddtemp_read */
507 #endif /* HDDTEMP_HAVE_READ */
509 /* module_register
510 Register collectd plugin. */
511 void module_register (void)
512 {
513 #if HDDTEMP_HAVE_READ
514 plugin_register_config ("hddtemp", hddtemp_config,
515 config_keys, config_keys_num);
516 plugin_register_init ("hddtemp", hddtemp_init);
517 plugin_register_read ("hddtemp", hddtemp_read);
518 #endif /* HDDTEMP_HAVE_READ */
519 }