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"
34 #include "common.h"
35 #include "plugin.h"
37 #include <libgen.h> /* for basename */
38 #include <netdb.h>
39 #include <netinet/in.h>
40 #include <netinet/tcp.h>
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[] = {"Host", "Port"};
50 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
52 static char *hddtemp_host = NULL;
53 static char hddtemp_port[16];
55 /*
56 * NAME
57 * hddtemp_query_daemon
58 *
59 * DESCRIPTION
60 * Connect to the hddtemp daemon and receive data.
61 *
62 * ARGUMENTS:
63 * `buffer' The buffer where we put the received ascii string.
64 * `buffer_size' Size of the buffer
65 *
66 * RETURN VALUE:
67 * >= 0 if ok, < 0 otherwise.
68 *
69 * NOTES:
70 * Example of possible strings, as received from daemon:
71 * |/dev/hda|ST340014A|36|C|
72 * |/dev/hda|ST380011A|46|C||/dev/hdd|ST340016A|SLP|*|
73 *
74 * FIXME:
75 * we need to create a new socket each time. Is there another way?
76 * Hm, maybe we can re-use the `sockaddr' structure? -octo
77 */
78 static int hddtemp_query_daemon(char *buffer, int buffer_size) {
79 int fd;
80 ssize_t status;
81 int buffer_fill;
83 const char *host;
84 const char *port;
86 struct addrinfo *ai_list;
87 int ai_return;
89 host = hddtemp_host;
90 if (host == NULL)
91 host = HDDTEMP_DEF_HOST;
93 port = hddtemp_port;
94 if (strlen(port) == 0)
95 port = HDDTEMP_DEF_PORT;
97 struct addrinfo ai_hints = {.ai_flags = AI_ADDRCONFIG,
98 .ai_family = AF_UNSPEC,
99 .ai_protocol = IPPROTO_TCP,
100 .ai_socktype = SOCK_STREAM};
102 if ((ai_return = getaddrinfo(host, port, &ai_hints, &ai_list)) != 0) {
103 char errbuf[1024];
104 ERROR("hddtemp plugin: getaddrinfo (%s, %s): %s", host, port,
105 (ai_return == EAI_SYSTEM) ? sstrerror(errno, errbuf, sizeof(errbuf))
106 : gai_strerror(ai_return));
107 return (-1);
108 }
110 fd = -1;
111 for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL;
112 ai_ptr = ai_ptr->ai_next) {
113 /* create our socket descriptor */
114 fd = socket(ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
115 if (fd < 0) {
116 char errbuf[1024];
117 ERROR("hddtemp plugin: socket: %s",
118 sstrerror(errno, errbuf, sizeof(errbuf)));
119 continue;
120 }
122 /* connect to the hddtemp daemon */
123 if (connect(fd, (struct sockaddr *)ai_ptr->ai_addr, ai_ptr->ai_addrlen)) {
124 char errbuf[1024];
125 INFO("hddtemp plugin: connect (%s, %s) failed: %s", host, port,
126 sstrerror(errno, errbuf, sizeof(errbuf)));
127 close(fd);
128 fd = -1;
129 continue;
130 }
132 /* A socket could be opened and connecting succeeded. We're
133 * done. */
134 break;
135 }
137 freeaddrinfo(ai_list);
139 if (fd < 0) {
140 ERROR("hddtemp plugin: Could not connect to daemon.");
141 return (-1);
142 }
144 /* receive data from the hddtemp daemon */
145 memset(buffer, '\0', buffer_size);
147 buffer_fill = 0;
148 while ((status = read(fd, buffer + buffer_fill, buffer_size - buffer_fill)) !=
149 0) {
150 if (status == -1) {
151 char errbuf[1024];
153 if ((errno == EAGAIN) || (errno == EINTR))
154 continue;
156 ERROR("hddtemp plugin: Error reading from socket: %s",
157 sstrerror(errno, errbuf, sizeof(errbuf)));
158 close(fd);
159 return (-1);
160 }
161 buffer_fill += status;
163 if (buffer_fill >= buffer_size)
164 break;
165 }
167 if (buffer_fill >= buffer_size) {
168 buffer[buffer_size - 1] = '\0';
169 WARNING("hddtemp plugin: Message from hddtemp has been "
170 "truncated.");
171 } else if (buffer_fill == 0) {
172 WARNING("hddtemp plugin: Peer has unexpectedly shut down "
173 "the socket. Buffer: `%s'",
174 buffer);
175 close(fd);
176 return (-1);
177 }
179 close(fd);
180 return (0);
181 }
183 static int hddtemp_config(const char *key, const char *value) {
184 if (strcasecmp(key, "Host") == 0) {
185 if (hddtemp_host != NULL)
186 free(hddtemp_host);
187 hddtemp_host = strdup(value);
188 } else if (strcasecmp(key, "Port") == 0) {
189 int port = (int)(atof(value));
190 if ((port > 0) && (port <= 65535))
191 ssnprintf(hddtemp_port, sizeof(hddtemp_port), "%i", port);
192 else
193 sstrncpy(hddtemp_port, value, sizeof(hddtemp_port));
194 } else {
195 return (-1);
196 }
198 return (0);
199 }
201 static void hddtemp_submit(char *type_instance, double value) {
202 value_t values[1];
203 value_list_t vl = VALUE_LIST_INIT;
205 values[0].gauge = value;
207 vl.values = values;
208 vl.values_len = 1;
209 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
210 sstrncpy(vl.plugin, "hddtemp", sizeof(vl.plugin));
211 sstrncpy(vl.type, "temperature", sizeof(vl.type));
212 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
214 plugin_dispatch_values(&vl);
215 }
217 static int hddtemp_read(void) {
218 char buf[1024];
219 char *fields[128];
220 char *ptr;
221 char *saveptr;
222 int num_fields;
223 int num_disks;
225 /* get data from daemon */
226 if (hddtemp_query_daemon(buf, sizeof(buf)) < 0)
227 return (-1);
229 /* NB: strtok_r will eat up "||" and leading "|"'s */
230 num_fields = 0;
231 ptr = buf;
232 saveptr = NULL;
233 while ((fields[num_fields] = strtok_r(ptr, "|", &saveptr)) != NULL) {
234 ptr = NULL;
235 num_fields++;
237 if (num_fields >= 128)
238 break;
239 }
241 num_disks = num_fields / 4;
243 for (int i = 0; i < num_disks; i++) {
244 char *name;
245 double temperature;
246 char *mode;
248 mode = fields[4 * i + 3];
249 name = basename(fields[4 * i + 0]);
251 /* Skip non-temperature information */
252 if (mode[0] != 'C' && mode[0] != 'F')
253 continue;
255 temperature = atof(fields[4 * i + 2]);
257 /* Convert farenheit to celsius */
258 if (mode[0] == 'F')
259 temperature = (temperature - 32.0) * 5.0 / 9.0;
261 hddtemp_submit(name, temperature);
262 }
264 return (0);
265 } /* int hddtemp_read */
267 /* module_register
268 Register collectd plugin. */
269 void module_register(void) {
270 plugin_register_config("hddtemp", hddtemp_config, config_keys,
271 config_keys_num);
272 plugin_register_read("hddtemp", hddtemp_read);
273 }