1 /*
2 * collectd - src/apcups.c
3 * Copyright (C) 2006 Anthony Gialluca <tonyabg at charter.net>
4 * Copyright (C) 2000-2004 Kern Sibbald
5 * Copyright (C) 1996-99 Andre M. Hedrick <andre at suse.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of version 2 of the GNU General
9 * Public License as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public
17 * License along with this program; if not, write to the Free
18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19 * MA 02111-1307, USA.
20 *
21 * Authors:
22 * Anthony Gialluca <tonyabg at charter.net>
23 **/
25 #include "collectd.h"
26 #include "common.h" /* rrd_update_file */
27 #include "plugin.h" /* plugin_register, plugin_submit */
28 #include "configfile.h" /* cf_register */
29 #include "utils_debug.h"
31 #if HAVE_SYS_TYPES_H
32 # include <sys/types.h>
33 #endif
34 #if HAVE_SYS_SOCKET_H
35 # include <sys/socket.h>
36 #endif
37 #if HAVE_NETDB_H
38 # include <netdb.h>
39 #endif
40 #if HAVE_NETINET_IN_H
41 # include <netinet/in.h>
42 #endif
43 #if HAVE_ARPA_INET_H
44 # include <arpa/inet.h> /* inet_addr */
45 #endif
47 #if 0
48 #include <pwd.h>
49 #include <setjmp.h> /* FIXME: Is this really neccessary? */
50 #include <termios.h> /* FIXME: Is this really neccessary? */
51 #include <sys/ioctl.h> /* FIXME: Is this really neccessary? */
52 #include <sys/ipc.h> /* FIXME: Is this really neccessary? */
53 #include <sys/sem.h> /* FIXME: Is this really neccessary? */
54 #include <sys/shm.h> /* FIXME: Is this really neccessary? */
55 #endif
57 #define NISPORT 3551
58 #define _(String) (String)
59 #define N_(String) (String)
60 #define MAXSTRING 256
61 #define MODULE_NAME "apcups"
63 /* Default values for contacting daemon */
64 static char *host = "localhost";
65 static int port = NISPORT;
67 /*
68 * The following are only if not compiled to test the module with its own main.
69 */
70 /* FIXME: Rename DSes to be more generic and follow established conventions. */
71 #ifndef APCMAIN
72 static char *volt_file_template = "apcups_volt-%s.rrd";
73 static char *volt_ds_def[] =
74 {
75 "DS:linev:GAUGE:"COLLECTD_HEARTBEAT":0:250",
76 "DS:outputv:GAUGE:"COLLECTD_HEARTBEAT":0:250",
77 NULL
78 };
79 static int volt_ds_num = 2;
81 static char *bvolt_file_template = "apcups_bvolt-%s.rrd";
82 static char *bvolt_ds_def[] =
83 {
84 "DS:battv:GAUGE:"COLLECTD_HEARTBEAT":0:100",
85 };
86 static int bvolt_ds_num = 1;
88 static char *load_file_template = "apcups_load-%s.rrd";
89 static char *load_ds_def[] =
90 {
91 "DS:loadpct:GAUGE:"COLLECTD_HEARTBEAT":0:120",
92 };
93 static int load_ds_num = 1;
95 static char *charge_file_template = "apcups_charge-%s.rrd";
96 static char *charge_ds_def[] =
97 {
98 "DS:bcharge:GAUGE:"COLLECTD_HEARTBEAT":0:100",
99 };
100 static int charge_ds_num = 1;
102 static char *time_file_template = "apcups_time-%s.rrd";
103 static char *time_ds_def[] =
104 {
105 "DS:timeleft:GAUGE:"COLLECTD_HEARTBEAT":0:100",
106 };
107 static int time_ds_num = 1;
109 static char *temp_file_template = "apcups_temp-%s.rrd";
110 static char *temp_ds_def[] =
111 {
112 "DS:itemp:GAUGE:"COLLECTD_HEARTBEAT":0:100",
113 };
114 static int temp_ds_num = 1;
116 static char *freq_file_template = "apcups_freq-%s.rrd";
117 static char *freq_ds_def[] =
118 {
119 "DS:linefreq:GAUGE:"COLLECTD_HEARTBEAT":0:65",
120 };
121 static int freq_ds_num = 1;
123 static char *config_keys[] =
124 {
125 "Host",
126 "Port",
127 NULL
128 };
129 static int config_keys_num = 2;
131 #endif /* ifndef APCMAIN */
133 struct apc_detail_s
134 {
135 float linev;
136 float loadpct;
137 float bcharge;
138 float timeleft;
139 float outputv;
140 float itemp;
141 float battv;
142 float linefreq;
143 };
145 #define BIG_BUF 4096
147 /*
148 * Read nbytes from the network.
149 * It is possible that the total bytes require in several
150 * read requests
151 */
152 static int read_nbytes(int fd, char *ptr, int nbytes)
153 {
154 int nleft, nread;
156 nleft = nbytes;
158 while (nleft > 0) {
159 do {
160 nread = read(fd, ptr, nleft);
161 } while (nread == -1 && (errno == EINTR || errno == EAGAIN));
163 if (nread <= 0) {
164 return (nread); /* error, or EOF */
165 }
167 nleft -= nread;
168 ptr += nread;
169 }
171 return (nbytes - nleft); /* return >= 0 */
172 }
174 /*
175 * Write nbytes to the network.
176 * It may require several writes.
177 */
178 static int write_nbytes(int fd, void *buf, int buflen)
179 {
180 int nleft;
181 int nwritten;
182 char *ptr;
184 ptr = (char *) buf;
186 nleft = buflen;
187 while (nleft > 0)
188 {
189 nwritten = write(fd, ptr, nleft);
191 if (nwritten <= 0)
192 {
193 syslog (LOG_ERR, "Writing to socket failed: %s", strerror (errno));
194 return (nwritten);
195 }
197 nleft -= nwritten;
198 ptr += nwritten;
199 }
201 /* If we get here, (nleft <= 0) is true */
202 return (buflen);
203 }
205 /* Close the network connection */
206 static void net_close (int sockfd)
207 {
208 short pktsiz = 0;
210 /* send EOF sentinel */
211 write_nbytes (sockfd, &pktsiz, sizeof (short));
212 close (sockfd);
213 }
216 /*
217 * Open a TCP connection to the UPS network server
218 * Returns -1 on error
219 * Returns socket file descriptor otherwise
220 */
221 static int net_open (char *host, char *service, int port)
222 {
223 int sd;
224 int status;
225 char port_str[8];
226 struct addrinfo ai_hints;
227 struct addrinfo *ai_return;
228 struct addrinfo *ai_list;
230 assert ((port > 0x00000000) && (port <= 0x0000FFFF));
232 /* Convert the port to a string */
233 snprintf (port_str, 8, "%i", port);
234 port_str[7] = '\0';
236 /* Resolve name */
237 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
238 ai_hints.ai_family = AF_INET; /* XXX: Change this to `AF_UNSPEC' if apcupsd can handle IPv6 */
239 ai_hints.ai_socktype = SOCK_STREAM;
241 status = getaddrinfo (host, port_str, &ai_hints, &ai_return);
242 if (status != 0)
243 {
244 DBG ("getaddrinfo failed: %s", status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
245 return (-1);
246 }
248 /* Create socket */
249 sd = -1;
250 for (ai_list = ai_return; ai_list != NULL; ai_list = ai_list->ai_next)
251 {
252 sd = socket (ai_list->ai_family, ai_list->ai_socktype, ai_list->ai_protocol);
253 if (sd >= 0)
254 break;
255 }
256 /* `ai_list' still holds the current description of the socket.. */
258 if (sd < 0)
259 {
260 DBG ("Unable to open a socket");
261 freeaddrinfo (ai_return);
262 return (-1);
263 }
265 status = connect (sd, ai_list->ai_addr, ai_list->ai_addrlen);
267 freeaddrinfo (ai_return);
269 if (status != 0) /* `connect(2)' failed */
270 {
271 DBG ("connect failed: %s", strerror (errno));
272 return (-1);
273 }
275 return (sd);
276 } /* int net_open(char *host, char *service, int port) */
278 /*
279 * Receive a message from the other end. Each message consists of
280 * two packets. The first is a header that contains the size
281 * of the data that follows in the second packet.
282 * Returns number of bytes read
283 * Returns 0 on end of file
284 * Returns -1 on hard end of file (i.e. network connection close)
285 * Returns -2 on error
286 */
287 static int net_recv (int sockfd, char *buf, int buflen)
288 {
289 int nbytes;
290 short pktsiz;
292 /* get data size -- in short */
293 if ((nbytes = read_nbytes (sockfd, (char *) &pktsiz, sizeof (short))) <= 0)
294 return (-1);
296 if (nbytes != sizeof (short))
297 return (-2);
299 pktsiz = ntohs(pktsiz);
300 if (pktsiz > buflen)
301 {
302 DBG ("record length too large");
303 return (-2);
304 }
306 if (pktsiz == 0)
307 return (0);
309 /* now read the actual data */
310 if ((nbytes = read_nbytes (sockfd, buf, pktsiz)) <= 0)
311 return (-2);
313 if (nbytes != pktsiz)
314 return (-2);
316 return (nbytes);
317 } /* static int net_recv (int sockfd, char *buf, int buflen) */
319 /*
320 * Send a message over the network. The send consists of
321 * two network packets. The first is sends a short containing
322 * the length of the data packet which follows.
323 * Returns zero on success
324 * Returns non-zero on error
325 */
326 static int net_send (int sockfd, char *buff, int len)
327 {
328 int rc;
329 short packet_size;
331 /* send short containing size of data packet */
332 packet_size = htons ((short) len);
334 rc = write_nbytes(sockfd, &packet_size, sizeof (packet_size));
335 if (rc != sizeof(packet_size))
336 return (-1);
338 /* send data packet */
339 rc = write_nbytes (sockfd, buff, len);
340 if (rc != len)
341 return (-1);
343 return (0);
344 }
346 /* Get and print status from apcupsd NIS server */
347 static int do_pthreads_status (char *host, int port,
348 struct apc_detail_s *apcups_detail)
349 {
350 int sockfd;
351 int n;
352 char recvline[MAXSTRING + 1];
353 char *tokptr;
354 char *key;
355 double value;
356 #if APCMAIN
357 # define PRINT_VALUE(name, val) printf(" Found property: name = %s; value = %f;\n", name, val)
358 #else
359 # define PRINT_VALUE(name, val) /**/
360 #endif
362 /* TODO: Keep the socket open, if possible */
363 if ((sockfd = net_open (host, NULL, port)) < 0)
364 {
365 syslog (LOG_ERR, "apcups plugin: Connecting to the apcupsd failed.");
366 return (-1);
367 }
369 net_send (sockfd, "status", 6);
371 while ((n = net_recv (sockfd, recvline, sizeof (recvline))) > 0)
372 {
373 recvline[n] = '\0';
374 #if APCMAIN
375 printf ("net_recv = `%s';\n", recvline);
376 #endif /* if APCMAIN */
378 tokptr = strtok (recvline, ":");
379 while (tokptr != NULL)
380 {
381 key = tokptr;
382 if ((tokptr = strtok (NULL, " \t")) == NULL)
383 continue;
384 value = atof (tokptr);
385 PRINT_VALUE (key, value);
387 if (strcmp ("LINEV", key) == 0)
388 apcups_detail->linev = value;
389 else if (strcmp ("BATTV", tokptr) == 0)
390 apcups_detail->battv = value;
391 else if (strcmp ("ITEMP", tokptr) == 0)
392 apcups_detail->itemp = value;
393 else if (strcmp ("LOADPCT", tokptr) == 0)
394 apcups_detail->loadpct = value;
395 else if (strcmp ("BCHARGE", tokptr) == 0)
396 apcups_detail->bcharge = value;
397 else if (strcmp ("OUTPUTV", tokptr) == 0)
398 apcups_detail->outputv = value;
399 else if (strcmp ("LINEFREQ", tokptr) == 0)
400 apcups_detail->linefreq = value;
401 else if (strcmp ("TIMELEFT", tokptr) == 0)
402 apcups_detail->timeleft = value;
403 else
404 {
405 syslog (LOG_WARNING, "apcups plugin: Received unknown property from apcupsd: `%s' = %f",
406 key, value);
407 }
409 tokptr = strtok (NULL, ":");
410 } /* while (tokptr != NULL) */
411 }
413 net_close (sockfd);
415 if (n < 0)
416 {
417 syslog (LOG_WARNING, "apcups plugin: Error reading from socket");
418 return (-1);
419 }
421 return (0);
422 }
424 #ifdef APCMAIN
425 int main(int argc, char **argv)
426 {
427 /* we are not really going to use this */
428 struct apc_detail_s apcups_detail;
430 if (!*host || strcmp(host, "0.0.0.0") == 0)
431 host = "localhost";
433 do_pthreads_status(host, port, &apcups_detail);
435 return 0;
436 }
437 #else
438 static void apcups_init (void)
439 {
440 return;
441 }
443 static int apcups_config (char *key, char *value)
444 {
445 static char lhost[126];
447 if (strcasecmp (key, "host") == 0)
448 {
449 lhost[0] = '\0';
450 strcpy(lhost,key);
451 host = lhost;
452 }
453 else if (strcasecmp (key, "Port") == 0)
454 {
455 int port_tmp = atoi (value);
456 if(port_tmp < 1 || port_tmp > 65535) {
457 syslog (LOG_WARNING, "apcups: `port' failed: %s",
458 value);
459 return (1);
460 } else {
461 port = port_tmp;
462 }
463 }
464 else
465 {
466 return (-1);
467 }
468 return(0);
469 }
471 #define BUFSIZE 256
472 static void apcups_submit (char *host,
473 struct apc_detail_s *apcups_detail)
474 {
475 char buf[BUFSIZE];
477 if (snprintf (buf, BUFSIZE, "%u:%f:%f",
478 (unsigned int) curtime,
479 apcups_detail->linev,
480 apcups_detail->outputv) >= BUFSIZE)
481 return;
483 plugin_submit (MODULE_NAME, host, buf);
484 }
486 static void apc_bvolt_submit (char *host,
487 struct apc_detail_s *apcups_detail)
488 {
489 char buf[BUFSIZE];
491 if (snprintf (buf, BUFSIZE, "%u:%f",
492 (unsigned int) curtime,
493 apcups_detail->battv) >= BUFSIZE)
494 return;
496 plugin_submit ("apcups_bvolt", host, buf);
497 }
499 static void apc_load_submit (char *host,
500 struct apc_detail_s *apcups_detail)
501 {
502 char buf[BUFSIZE];
504 if (snprintf (buf, BUFSIZE, "%u:%f",
505 (unsigned int) curtime,
506 apcups_detail->loadpct) >= BUFSIZE)
507 return;
509 plugin_submit ("apcups_load", host, buf);
510 }
512 static void apc_charge_submit (char *host,
513 struct apc_detail_s *apcups_detail)
514 {
515 char buf[BUFSIZE];
517 if (snprintf (buf, BUFSIZE, "%u:%f",
518 (unsigned int) curtime,
519 apcups_detail->bcharge) >= BUFSIZE)
520 return;
522 plugin_submit ("apcups_charge", host, buf);
523 }
525 static void apc_temp_submit (char *host,
526 struct apc_detail_s *apcups_detail)
527 {
528 char buf[BUFSIZE];
530 if (snprintf (buf, BUFSIZE, "%u:%f",
531 (unsigned int) curtime,
532 apcups_detail->itemp) >= BUFSIZE)
533 return;
535 plugin_submit ("apcups_temp", host, buf);
536 }
538 static void apc_time_submit (char *host,
539 struct apc_detail_s *apcups_detail)
540 {
541 char buf[BUFSIZE];
543 if (snprintf (buf, BUFSIZE, "%u:%f",
544 (unsigned int) curtime,
545 apcups_detail->timeleft) >= BUFSIZE)
546 return;
548 plugin_submit ("apcups_time", host, buf);
549 }
551 static void apc_freq_submit (char *host,
552 struct apc_detail_s *apcups_detail)
553 {
554 char buf[BUFSIZE];
556 if (snprintf (buf, BUFSIZE, "%u:%f",
557 (unsigned int) curtime,
558 apcups_detail->linefreq) >= BUFSIZE)
559 return;
561 plugin_submit ("apcups_freq", host, buf);
562 }
563 #undef BUFSIZE
565 static void apcups_read (void)
566 {
567 struct apc_detail_s apcups_detail;
568 int status;
570 apcups_detail.linev = 0.0;
571 apcups_detail.loadpct = 0.0;
572 apcups_detail.bcharge = 0.0;
573 apcups_detail.timeleft = 0.0;
574 apcups_detail.outputv = 0.0;
575 apcups_detail.itemp = 0.0;
576 apcups_detail.battv = 0.0;
577 apcups_detail.linefreq = 0.0;
580 if (!*host || strcmp(host, "0.0.0.0") == 0)
581 host = "localhost";
583 status = do_pthreads_status(host, port, &apcups_detail);
585 /*
586 * if we did not connect then do not bother submitting
587 * zeros. We want rrd files to have NAN.
588 */
589 if (status != 0)
590 return;
592 apcups_submit (host, &apcups_detail);
593 apc_bvolt_submit (host, &apcups_detail);
594 apc_load_submit (host, &apcups_detail);
595 apc_charge_submit (host, &apcups_detail);
596 apc_temp_submit (host, &apcups_detail);
597 apc_time_submit (host, &apcups_detail);
598 apc_freq_submit (host, &apcups_detail);
599 }
602 static void apcups_write (char *host, char *inst, char *val)
603 {
604 char file[512];
605 int status;
607 status = snprintf (file, 512, volt_file_template, inst);
608 if (status < 1)
609 return;
610 else if (status >= 512)
611 return;
613 rrd_update_file (host, file, val, volt_ds_def, volt_ds_num);
614 }
616 static void apc_bvolt_write (char *host, char *inst, char *val)
617 {
618 char file[512];
619 int status;
621 status = snprintf (file, 512, bvolt_file_template, inst);
622 if (status < 1)
623 return;
624 else if (status >= 512)
625 return;
627 rrd_update_file (host, file, val, bvolt_ds_def, bvolt_ds_num);
628 }
630 static void apc_load_write (char *host, char *inst, char *val)
631 {
632 char file[512];
633 int status;
635 status = snprintf (file, 512, load_file_template, inst);
636 if (status < 1)
637 return;
638 else if (status >= 512)
639 return;
641 rrd_update_file (host, file, val, load_ds_def, load_ds_num);
642 }
644 static void apc_charge_write (char *host, char *inst, char *val)
645 {
646 char file[512];
647 int status;
649 status = snprintf (file, 512, charge_file_template, inst);
650 if (status < 1)
651 return;
652 else if (status >= 512)
653 return;
655 rrd_update_file (host, file, val, charge_ds_def, charge_ds_num);
656 }
658 static void apc_temp_write (char *host, char *inst, char *val)
659 {
660 char file[512];
661 int status;
663 status = snprintf (file, 512, temp_file_template, inst);
664 if (status < 1)
665 return;
666 else if (status >= 512)
667 return;
669 rrd_update_file (host, file, val, temp_ds_def, temp_ds_num);
670 }
672 static void apc_time_write (char *host, char *inst, char *val)
673 {
674 char file[512];
675 int status;
677 status = snprintf (file, 512, time_file_template, inst);
678 if (status < 1)
679 return;
680 else if (status >= 512)
681 return;
683 rrd_update_file (host, file, val, time_ds_def, time_ds_num);
684 }
686 static void apc_freq_write (char *host, char *inst, char *val)
687 {
688 char file[512];
689 int status;
691 status = snprintf (file, 512, freq_file_template, inst);
692 if (status < 1)
693 return;
694 else if (status >= 512)
695 return;
697 rrd_update_file (host, file, val, freq_ds_def, freq_ds_num);
698 }
700 void module_register (void)
701 {
702 plugin_register (MODULE_NAME, apcups_init, apcups_read, apcups_write);
703 plugin_register ("apcups_bvolt", NULL, NULL, apc_bvolt_write);
704 plugin_register ("apcups_load", NULL, NULL, apc_load_write);
705 plugin_register ("apcups_charge", NULL, NULL, apc_charge_write);
706 plugin_register ("apcups_temp", NULL, NULL, apc_temp_write);
707 plugin_register ("apcups_time", NULL, NULL, apc_time_write);
708 plugin_register ("apcups_freq", NULL, NULL, apc_freq_write);
709 cf_register (MODULE_NAME, apcups_config, config_keys, config_keys_num);
710 }
712 #endif /* ifdef APCMAIN */
713 #undef MODULE_NAME