2 * collectd - src/hddtemp.c
3 * Copyright (C) 2005,2006 Vincent Stehlé
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.
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.
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
20 * Vincent Stehlé <vincent.stehle at free.fr>
21 * Florian octo Forster <octo at verplant.org>
24 * Do a pass, some day, and spare some memory. We consume too much for now
25 * in string buffers and the like.
32 #include "configfile.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>
44 #define HDDTEMP_DEF_HOST "127.0.0.1"
45 #define HDDTEMP_DEF_PORT "7634"
47 static const char *config_keys[] =
53 static int config_keys_num = 2;
55 typedef struct hddname
63 static hddname_t *first_hddname = NULL;
64 static char *hddtemp_host = NULL;
65 static char hddtemp_port[16];
69 * hddtemp_query_daemon
72 * Connect to the hddtemp daemon and receive data.
75 * `buffer' The buffer where we put the received ascii string.
76 * `buffer_size' Size of the buffer
79 * >= 0 if ok, < 0 otherwise.
82 * Example of possible strings, as received from daemon:
83 * |/dev/hda|ST340014A|36|C|
84 * |/dev/hda|ST380011A|46|C||/dev/hdd|ST340016A|SLP|*|
87 * we need to create a new socket each time. Is there another way?
88 * Hm, maybe we can re-use the `sockaddr' structure? -octo
90 static int hddtemp_query_daemon (char *buffer, int buffer_size)
99 struct addrinfo ai_hints;
100 struct addrinfo *ai_list, *ai_ptr;
103 memset (&ai_hints, '\0', sizeof (ai_hints));
104 ai_hints.ai_flags = AI_ADDRCONFIG;
105 ai_hints.ai_family = PF_UNSPEC;
106 ai_hints.ai_socktype = SOCK_STREAM;
107 ai_hints.ai_protocol = IPPROTO_TCP;
111 host = HDDTEMP_DEF_HOST;
114 if (strlen (port) == 0)
115 port = HDDTEMP_DEF_PORT;
117 if ((ai_return = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
120 ERROR ("hddtemp: getaddrinfo (%s, %s): %s",
122 (ai_return == EAI_SYSTEM)
123 ? sstrerror (errno, errbuf, sizeof (errbuf))
124 : gai_strerror (ai_return));
129 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
131 /* create our socket descriptor */
132 if ((fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol)) < 0)
135 ERROR ("hddtemp: socket: %s",
136 sstrerror (errno, errbuf, sizeof (errbuf)));
140 /* connect to the hddtemp daemon */
141 if (connect (fd, (struct sockaddr *) ai_ptr->ai_addr, ai_ptr->ai_addrlen))
144 DEBUG ("hddtemp: connect (%s, %s): %s", host, port,
145 sstrerror (errno, errbuf, sizeof (errbuf)));
151 /* A socket could be opened and connecting succeeded. We're
156 freeaddrinfo (ai_list);
160 ERROR ("hddtemp: Could not connect to daemon.");
164 /* receive data from the hddtemp daemon */
165 memset (buffer, '\0', buffer_size);
168 while ((status = read (fd, buffer + buffer_fill, buffer_size - buffer_fill)) != 0)
174 if ((errno == EAGAIN) || (errno == EINTR))
177 ERROR ("hddtemp: Error reading from socket: %s",
178 sstrerror (errno, errbuf, sizeof (errbuf)));
182 buffer_fill += status;
184 if (buffer_fill >= buffer_size)
188 if (buffer_fill >= buffer_size)
190 buffer[buffer_size - 1] = '\0';
191 WARNING ("hddtemp: Message from hddtemp has been truncated.");
193 else if (buffer_fill == 0)
195 WARNING ("hddtemp: Peer has unexpectedly shut down the socket. "
196 "Buffer: `%s'", buffer);
205 static int hddtemp_config (const char *key, const char *value)
207 if (strcasecmp (key, "Host") == 0)
209 if (hddtemp_host != NULL)
211 hddtemp_host = strdup (value);
213 else if (strcasecmp (key, "Port") == 0)
215 int port = (int) (atof (value));
216 if ((port > 0) && (port <= 65535))
217 snprintf (hddtemp_port, sizeof (hddtemp_port),
220 strncpy (hddtemp_port, value, sizeof (hddtemp_port));
221 hddtemp_port[sizeof (hddtemp_port) - 1] = '\0';
231 /* In the init-function we initialize the `hddname_t' list used to translate
232 * disk-names. Under Linux that's done using `/proc/partitions'. Under other
233 * operating-systems, it's not done at all. */
234 static int hddtemp_init (void)
250 next = first_hddname;
259 first_hddname = NULL;
261 if ((fh = fopen ("/proc/partitions", "r")) != NULL)
263 DEBUG ("Looking at /proc/partitions...");
265 while (fgets (buf, sizeof (buf), fh) != NULL)
267 /* Delete trailing newlines */
268 buflen = strlen (buf);
270 while ((buflen > 0) && ((buf[buflen-1] == '\n') || (buf[buflen-1] == '\r')))
271 buf[--buflen] = '\0';
273 /* We want lines of the form:
277 * ...so, skip everything else. */
281 num_fields = strsplit (buf, fields, 16);
286 major = atoi (fields[0]);
287 minor = atoi (fields[1]);
289 /* We try to keep only entries, which may correspond to
290 * physical disks and that may have a corresponding
291 * entry in the hddtemp daemon. Basically, this means
296 case SCSI_DISK0_MAJOR:
297 case SCSI_DISK1_MAJOR:
298 case SCSI_DISK2_MAJOR:
299 case SCSI_DISK3_MAJOR:
300 case SCSI_DISK4_MAJOR:
301 case SCSI_DISK5_MAJOR:
302 case SCSI_DISK6_MAJOR:
303 case SCSI_DISK7_MAJOR:
304 case SCSI_DISK8_MAJOR:
305 case SCSI_DISK9_MAJOR:
306 case SCSI_DISK10_MAJOR:
307 case SCSI_DISK11_MAJOR:
308 case SCSI_DISK12_MAJOR:
309 case SCSI_DISK13_MAJOR:
310 case SCSI_DISK14_MAJOR:
311 case SCSI_DISK15_MAJOR:
312 /* SCSI disks minors are multiples of 16.
313 * Keep only those. */
329 /* IDE disks minors can only be 0 or 64.
330 * Keep only those. */
331 if(minor != 0 && minor != 64)
335 /* Skip all other majors. */
337 DEBUG ("Skipping unknown major %i", major);
339 } /* switch (major) */
341 if ((name = strdup (fields[3])) == NULL)
343 ERROR ("hddtemp: strdup(%s) == NULL", fields[3]);
347 if ((entry = (hddname_t *) malloc (sizeof (hddname_t))) == NULL)
349 ERROR ("hddtemp: malloc (%u) == NULL",
350 (unsigned int) sizeof (hddname_t));
355 DEBUG ("Found disk: %s (%u:%u).", name, major, minor);
357 entry->major = major;
358 entry->minor = minor;
362 if (first_hddname == NULL)
364 first_hddname = entry;
368 entry->next = first_hddname;
369 first_hddname = entry;
378 DEBUG ("Could not open /proc/partitions: %s",
379 sstrerror (errno, errbuf, sizeof (errbuf)));
381 #endif /* COLLECT_DEBUG */
382 #endif /* KERNEL_LINUX */
385 } /* int hddtemp_init */
391 * Try to "cook" a bit the drive name as returned
392 * by the hddtemp daemon. The intend is to transform disk
393 * names into <major>-<minor> when possible.
395 static char *hddtemp_get_name (char *drive)
400 for (list = first_hddname; list != NULL; list = list->next)
401 if (strcmp (drive, list->name) == 0)
406 DEBUG ("Don't know %s, keeping name as-is.", drive);
407 return (strdup (drive));
410 if ((ret = (char *) malloc (128 * sizeof (char))) == NULL)
413 if (snprintf (ret, 128, "%i-%i", list->major, list->minor) >= 128)
422 static void hddtemp_submit (char *type_instance, double value)
425 value_list_t vl = VALUE_LIST_INIT;
427 values[0].gauge = value;
431 vl.time = time (NULL);
432 strcpy (vl.host, hostname_g);
433 strcpy (vl.plugin, "hddtemp");
434 strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
436 plugin_dispatch_values ("temperature", &vl);
439 static int hddtemp_read (void)
449 /* get data from daemon */
450 if (hddtemp_query_daemon (buf, sizeof (buf)) < 0)
453 /* NB: strtok_r will eat up "||" and leading "|"'s */
457 while ((fields[num_fields] = strtok_r (ptr, "|", &saveptr)) != NULL)
462 if (num_fields >= 128)
466 num_disks = num_fields / 4;
468 for (i = 0; i < num_disks; i++)
470 char *name, *submit_name;
474 mode = fields[4*i + 3];
475 name = basename (fields[4*i + 0]);
477 /* Skip non-temperature information */
478 if (mode[0] != 'C' && mode[0] != 'F')
481 temperature = atof (fields[4*i + 2]);
483 /* Convert farenheit to celsius */
485 temperature = (temperature - 32.0) * 5.0 / 9.0;
487 if ((submit_name = hddtemp_get_name (name)) != NULL)
489 hddtemp_submit (submit_name, temperature);
494 hddtemp_submit (name, temperature);
499 } /* int hddtemp_read */
502 Register collectd plugin. */
503 void module_register (void)
505 plugin_register_config ("hddtemp", hddtemp_config,
506 config_keys, config_keys_num);
507 plugin_register_init ("hddtemp", hddtemp_init);
508 plugin_register_read ("hddtemp", hddtemp_read);