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>
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.
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.
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,
22 * Anthony Gialluca <tonyabg at charter.net>
26 * FIXME: Don't know why but without this here atof() was not returning
27 * correct values for me. This is behavior that I don't understand and
28 * should be examined in closer detail.
33 #include "common.h" /* rrd_update_file */
34 #include "plugin.h" /* plugin_register, plugin_submit */
35 #include "configfile.h" /* cf_register */
36 #include "utils_debug.h"
39 # include <sys/types.h>
42 # include <sys/socket.h>
49 # include <netinet/in.h>
58 #define MODULE_NAME "apcups"
60 #define APCUPS_DEFAULT_HOST "localhost"
62 /* Default values for contacting daemon */
63 static char *global_host = NULL;
64 static int global_port = NISPORT;
67 * The following are only if not compiled to test the module with its own main.
70 static char *bvolt_file_template = "apcups/voltage-%s.rrd";
71 static char *bvolt_ds_def[] =
73 "DS:voltage:GAUGE:"COLLECTD_HEARTBEAT":0:U",
75 static int bvolt_ds_num = 1;
77 static char *load_file_template = "apcups/load_percent.rrd";
78 static char *load_ds_def[] =
80 "DS:percent:GAUGE:"COLLECTD_HEARTBEAT":0:110",
82 static int load_ds_num = 1;
84 static char *charge_file_template = "apcups/charge_percent.rrd";
85 static char *charge_ds_def[] =
87 "DS:percent:GAUGE:"COLLECTD_HEARTBEAT":0:110",
89 static int charge_ds_num = 1;
91 static char *time_file_template = "apcups/timeleft.rrd";
92 static char *time_ds_def[] =
94 "DS:timeleft:GAUGE:"COLLECTD_HEARTBEAT":0:100",
96 static int time_ds_num = 1;
98 static char *temp_file_template = "apcups/temperature.rrd";
99 static char *temp_ds_def[] =
101 /* -273.15 is absolute zero */
102 "DS:value:GAUGE:"COLLECTD_HEARTBEAT":-274:U",
104 static int temp_ds_num = 1;
106 static char *freq_file_template = "apcups/frequency-%s.rrd";
107 static char *freq_ds_def[] =
109 "DS:frequency:GAUGE:"COLLECTD_HEARTBEAT":0:U",
111 static int freq_ds_num = 1;
113 static char *config_keys[] =
119 static int config_keys_num = 2;
121 #endif /* if APCMAIN */
138 * Write nbytes to the network.
139 * It may require several writes.
141 static int write_nbytes (int *fd, void *buf, int buflen)
155 nwritten = write (*fd, ptr, nleft);
157 if ((nwritten < 0) && ((errno == EAGAIN) || (errno == EINTR)))
163 DBG ("Writing to socket failed: %s; *fd = -1;", strerror (errno));
164 syslog (LOG_ERR, "apcups plugin: Writing to socket failed: %s", strerror (errno));
172 /* If we get here, (nleft <= 0) is true */
177 /* Close the network connection */
178 static void net_close (int *fd)
184 DBG ("Gracefully shutting down socket %i.", *fd);
186 /* send EOF sentinel */
187 write_nbytes (fd, &pktsiz, sizeof (short));
195 * Open a TCP connection to the UPS network server
196 * Returns -1 on error
197 * Returns socket file descriptor otherwise
199 static int net_open (char *host, char *service, int port)
204 struct addrinfo ai_hints;
205 struct addrinfo *ai_return;
206 struct addrinfo *ai_list;
208 assert ((port > 0x00000000) && (port <= 0x0000FFFF));
210 /* Convert the port to a string */
211 snprintf (port_str, 8, "%i", port);
215 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
216 ai_hints.ai_family = AF_INET; /* XXX: Change this to `AF_UNSPEC' if apcupsd can handle IPv6 */
217 ai_hints.ai_socktype = SOCK_STREAM;
219 status = getaddrinfo (host, port_str, &ai_hints, &ai_return);
222 DBG ("getaddrinfo failed: %s", status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
228 for (ai_list = ai_return; ai_list != NULL; ai_list = ai_list->ai_next)
230 sd = socket (ai_list->ai_family, ai_list->ai_socktype, ai_list->ai_protocol);
234 /* `ai_list' still holds the current description of the socket.. */
238 DBG ("Unable to open a socket");
239 freeaddrinfo (ai_return);
243 status = connect (sd, ai_list->ai_addr, ai_list->ai_addrlen);
245 freeaddrinfo (ai_return);
247 if (status != 0) /* `connect(2)' failed */
249 DBG ("connect failed: %s", strerror (errno));
253 DBG ("Done opening a socket %i", sd);
256 } /* int net_open (char *host, char *service, int port) */
259 * Receive a message from the other end. Each message consists of
260 * two packets. The first is a header that contains the size
261 * of the data that follows in the second packet.
262 * Returns number of bytes read
263 * Returns 0 on end of file
264 * Returns -1 on hard end of file (i.e. network connection close)
265 * Returns -2 on error
267 static int net_recv (int *sockfd, char *buf, int buflen)
272 /* get data size -- in short */
273 if ((nbytes = sread (*sockfd, (void *) &pktsiz, sizeof (short))) <= 0)
279 if (nbytes != sizeof (short))
282 pktsiz = ntohs (pktsiz);
285 DBG ("record length too large");
292 /* now read the actual data */
293 if ((nbytes = sread (*sockfd, (void *) buf, pktsiz)) <= 0)
299 if (nbytes != pktsiz)
303 } /* static int net_recv (int *sockfd, char *buf, int buflen) */
306 * Send a message over the network. The send consists of
307 * two network packets. The first is sends a short containing
308 * the length of the data packet which follows.
309 * Returns zero on success
310 * Returns non-zero on error
312 static int net_send (int *sockfd, char *buff, int len)
318 assert (*sockfd >= 0);
320 /* send short containing size of data packet */
321 packet_size = htons ((short) len);
323 rc = write_nbytes (sockfd, &packet_size, sizeof (packet_size));
324 if (rc != sizeof (packet_size))
327 /* send data packet */
328 rc = write_nbytes (sockfd, buff, len);
335 /* Get and print status from apcupsd NIS server */
336 static int apc_query_server (char *host, int port,
337 struct apc_detail_s *apcups_detail)
345 static int sockfd = -1;
346 static unsigned int complain = 0;
349 # define PRINT_VALUE(name, val) printf(" Found property: name = %s; value = %f;\n", name, val)
351 # define PRINT_VALUE(name, val) /**/
356 if ((sockfd = net_open (host, NULL, port)) < 0)
358 /* Complain once every six hours. */
359 int complain_step = 21600 / atoi (COLLECTD_STEP);
361 if ((complain % complain_step) == 0)
362 syslog (LOG_ERR, "apcups plugin: Connecting to the apcupsd failed.");
367 else if (complain > 1)
369 syslog (LOG_NOTICE, "apcups plugin: Connection re-established to the apcupsd.");
374 if (net_send (&sockfd, "status", 6) < 0)
376 syslog (LOG_ERR, "apcups plugin: Writing to the socket failed.");
380 while ((n = net_recv (&sockfd, recvline, sizeof (recvline) - 1)) > 0)
382 assert (n < sizeof (recvline));
385 printf ("net_recv = `%s';\n", recvline);
386 #endif /* if APCMAIN */
388 tokptr = strtok (recvline, " :\t");
389 while (tokptr != NULL)
392 if ((tokptr = strtok (NULL, " :\t")) == NULL)
394 value = atof (tokptr);
396 PRINT_VALUE (key, value);
398 if (strcmp ("LINEV", key) == 0)
399 apcups_detail->linev = value;
400 else if (strcmp ("BATTV", key) == 0)
401 apcups_detail->battv = value;
402 else if (strcmp ("ITEMP", key) == 0)
403 apcups_detail->itemp = value;
404 else if (strcmp ("LOADPCT", key) == 0)
405 apcups_detail->loadpct = value;
406 else if (strcmp ("BCHARGE", key) == 0)
407 apcups_detail->bcharge = value;
408 else if (strcmp ("OUTPUTV", key) == 0)
409 apcups_detail->outputv = value;
410 else if (strcmp ("LINEFREQ", key) == 0)
411 apcups_detail->linefreq = value;
412 else if (strcmp ("TIMELEFT", key) == 0)
413 apcups_detail->timeleft = value;
415 tokptr = strtok (NULL, ":");
416 } /* while (tokptr != NULL) */
421 syslog (LOG_WARNING, "apcups plugin: Error reading from socket");
427 /* close the opened socket */
437 * This is used for testing apcups in a standalone mode.
438 * Usefull for debugging.
440 int main (int argc, char **argv)
442 /* we are not really going to use this */
443 struct apc_detail_s apcups_detail;
445 openlog ("apcups", LOG_PID | LOG_NDELAY | LOG_LOCAL1, LOG_USER);
447 if (global_host == NULL || strcmp (global_host, "0.0.0.0") == 0)
448 global_host = "localhost";
450 if(apc_query_server (global_host, global_port, &apcups_detail) < 0)
452 printf("apcups: Failed...\n");
459 static int apcups_config (char *key, char *value)
461 if (strcasecmp (key, "host") == 0)
463 if (global_host != NULL)
468 if ((global_host = strdup (value)) == NULL)
471 else if (strcasecmp (key, "Port") == 0)
473 int port_tmp = atoi (value);
474 if (port_tmp < 1 || port_tmp > 65535)
476 syslog (LOG_WARNING, "apcups plugin: Invalid port: %i", port_tmp);
479 global_port = port_tmp;
488 static void apcups_init (void)
493 static void apc_write_voltage (char *host, char *inst, char *val)
498 status = snprintf (file, 512, bvolt_file_template, inst);
499 if ((status < 1) || (status >= 512))
502 rrd_update_file (host, file, val, bvolt_ds_def, bvolt_ds_num);
505 static void apc_write_charge (char *host, char *inst, char *val)
507 rrd_update_file (host, charge_file_template, val, charge_ds_def, charge_ds_num);
510 static void apc_write_percent (char *host, char *inst, char *val)
512 rrd_update_file (host, load_file_template, val, load_ds_def, load_ds_num);
515 static void apc_write_timeleft (char *host, char *inst, char *val)
517 rrd_update_file (host, time_file_template, val, time_ds_def, time_ds_num);
520 static void apc_write_temperature (char *host, char *inst, char *val)
522 rrd_update_file (host, temp_file_template, val, temp_ds_def, temp_ds_num);
525 static void apc_write_frequency (char *host, char *inst, char *val)
530 status = snprintf (file, 512, freq_file_template, inst);
531 if ((status < 1) || (status >= 512))
534 rrd_update_file (host, file, val, freq_ds_def, freq_ds_num);
537 static void apc_submit_generic (char *type, char *inst,
543 status = snprintf (buf, 512, "%u:%f",
544 (unsigned int) curtime, value);
545 if ((status < 1) || (status >= 512))
548 DBG ("plugin_submit (%s, %s, %s);", type, inst, buf);
549 plugin_submit (type, inst, buf);
552 static void apc_submit (struct apc_detail_s *apcups_detail)
554 apc_submit_generic ("apcups_voltage", "input", apcups_detail->linev);
555 apc_submit_generic ("apcups_voltage", "output", apcups_detail->outputv);
556 apc_submit_generic ("apcups_voltage", "battery", apcups_detail->battv);
557 apc_submit_generic ("apcups_charge", "-", apcups_detail->bcharge);
558 apc_submit_generic ("apcups_charge_pct", "-", apcups_detail->loadpct);
559 apc_submit_generic ("apcups_timeleft", "-", apcups_detail->timeleft);
560 apc_submit_generic ("apcups_temp", "-", apcups_detail->itemp);
561 apc_submit_generic ("apcups_frequency", "input", apcups_detail->linefreq);
564 static void apcups_read (void)
566 struct apc_detail_s apcups_detail;
569 apcups_detail.linev = -1.0;
570 apcups_detail.outputv = -1.0;
571 apcups_detail.battv = -1.0;
572 apcups_detail.loadpct = -1.0;
573 apcups_detail.bcharge = -1.0;
574 apcups_detail.timeleft = -1.0;
575 apcups_detail.itemp = -300.0;
576 apcups_detail.linefreq = -1.0;
578 status = apc_query_server (global_host == NULL
579 ? APCUPS_DEFAULT_HOST
581 global_port, &apcups_detail);
584 * if we did not connect then do not bother submitting
585 * zeros. We want rrd files to have NAN.
589 DBG ("apc_query_server (%s, %i) = %i",
591 ? APCUPS_DEFAULT_HOST
593 global_port, status);
597 apc_submit (&apcups_detail);
600 void module_register (void)
602 plugin_register (MODULE_NAME, apcups_init, apcups_read, NULL);
603 plugin_register ("apcups_voltage", NULL, NULL, apc_write_voltage);
604 plugin_register ("apcups_charge", NULL, NULL, apc_write_charge);
605 plugin_register ("apcups_charge_pct", NULL, NULL, apc_write_percent);
606 plugin_register ("apcups_timeleft", NULL, NULL, apc_write_timeleft);
607 plugin_register ("apcups_temp", NULL, NULL, apc_write_temperature);
608 plugin_register ("apcups_frequency", NULL, NULL, apc_write_frequency);
609 cf_register (MODULE_NAME, apcups_config, config_keys, config_keys_num);
612 #endif /* if APCMAIN */