/*
* collectd - src/apcups.c
- * Copyright (C) 2007 Florian octo Forster
- * Copyright (C) 2006 Anthony Gialluca <tonyabg at charter.net>
- * Copyright (C) 2000-2004 Kern Sibbald
- * Copyright (C) 1996-99 Andre M. Hedrick <andre at suse.com>
- *
+ * Copyright (C) 2006-2012 Florian octo Forster
+ * Copyright (C) 2006 Anthony Gialluca <tonyabg at charter.net>
+ * Copyright (C) 2000-2004 Kern Sibbald
+ * Copyright (C) 1996-1999 Andre M. Hedrick <andre at suse.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General
*
* Authors:
* Anthony Gialluca <tonyabg at charter.net>
+ * Florian octo Forster <octo at collectd.org>
**/
#include "collectd.h"
/* Default values for contacting daemon */
static char *conf_host = NULL;
static int conf_port = NISPORT;
+/* Defaults to false for backwards compatibility. */
+static _Bool conf_report_seconds = 0;
static int global_sockfd = -1;
+static int count_retries = 0;
+static int count_iterations = 0;
+static _Bool close_socket = 0;
+
static const char *config_keys[] =
{
"Host",
"Port",
- NULL
+ "ReportSeconds"
};
-static int config_keys_num = 2;
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
-/* Close the network connection */
-static int apcups_shutdown (void)
+static int net_shutdown (int *fd)
{
uint16_t packet_size = 0;
- if (global_sockfd < 0)
- return (0);
+ if ((fd == NULL) || (*fd < 0))
+ return (EINVAL);
- DEBUG ("Gracefully shutting down socket %i.", global_sockfd);
+ swrite (*fd, (void *) &packet_size, sizeof (packet_size));
+ close (*fd);
+ *fd = -1;
- /* send EOF sentinel */
- swrite (global_sockfd, (void *) &packet_size, sizeof (packet_size));
+ return (0);
+} /* int net_shutdown */
- close (global_sockfd);
- global_sockfd = -1;
+/* Close the network connection */
+static int apcups_shutdown (void)
+{
+ if (global_sockfd < 0)
+ return (0);
+ net_shutdown (&global_sockfd);
return (0);
} /* int apcups_shutdown */
-/*
+/*
* Open a TCP connection to the UPS network server
* Returns -1 on error
* Returns socket file descriptor otherwise
return (sd);
} /* int net_open (char *host, char *service, int port) */
-/*
+/*
* Receive a message from the other end. Each message consists of
* two packets. The first is a header that contains the size
* of the data that follows in the second packet.
/* get data size -- in short */
if (sread (*sockfd, (void *) &packet_size, sizeof (packet_size)) != 0)
{
+ close (*sockfd);
*sockfd = -1;
return (-1);
}
packet_size = ntohs (packet_size);
if (packet_size > buflen)
{
- DEBUG ("record length too large");
+ ERROR ("apcups plugin: Received %"PRIu16" bytes of payload "
+ "but have only %i bytes of buffer available.",
+ packet_size, buflen);
+ close (*sockfd);
+ *sockfd = -1;
return (-2);
}
/* now read the actual data */
if (sread (*sockfd, (void *) buf, packet_size) != 0)
{
+ close (*sockfd);
*sockfd = -1;
return (-1);
}
if (swrite (*sockfd, (void *) &packet_size, sizeof (packet_size)) != 0)
{
+ close (*sockfd);
*sockfd = -1;
return (-1);
}
/* send data packet */
if (swrite (*sockfd, (void *) buff, len) != 0)
{
+ close (*sockfd);
*sockfd = -1;
return (-2);
}
char *toksaveptr;
char *key;
double value;
+ _Bool retry = 1;
+ int status;
#if APCMAIN
# define PRINT_VALUE(name, val) printf(" Found property: name = %s; value = %f;\n", name, val)
# define PRINT_VALUE(name, val) /**/
#endif
- if (global_sockfd < 0)
+ while (retry)
{
- global_sockfd = net_open (host, port);
if (global_sockfd < 0)
{
- ERROR ("apcups plugin: Connecting to the "
- "apcupsd failed.");
+ global_sockfd = net_open (host, port);
+ if (global_sockfd < 0)
+ {
+ ERROR ("apcups plugin: Connecting to the "
+ "apcupsd failed.");
+ return (-1);
+ }
+ }
+
+
+ status = net_send (&global_sockfd, "status", strlen ("status"));
+ if (status != 0)
+ {
+ /* net_send is closing the socket on error. */
+ assert (global_sockfd < 0);
+ if (retry)
+ {
+ retry = 0;
+ count_retries++;
+ continue;
+ }
+
+ ERROR ("apcups plugin: Writing to the socket failed.");
return (-1);
}
- }
- if (net_send (&global_sockfd, "status", 6) < 0)
+ break;
+ } /* while (retry) */
+
+ /* When collectd's collection interval is larger than apcupsd's
+ * timeout, we would have to retry / re-connect each iteration. Try to
+ * detect this situation and shut down the socket gracefully in that
+ * case. Otherwise, keep the socket open to avoid overhead. */
+ count_iterations++;
+ if ((count_iterations == 10) && (count_retries > 2))
{
- ERROR ("apcups plugin: Writing to the socket failed.");
- return (-1);
+ NOTICE ("apcups plugin: There have been %i retries in the "
+ "first %i iterations. Will close the socket "
+ "in future iterations.",
+ count_retries, count_iterations);
+ close_socket = 1;
}
while ((n = net_recv (&global_sockfd, recvline, sizeof (recvline) - 1)) > 0)
if (strcmp ("LINEV", key) == 0)
apcups_detail->linev = value;
- else if (strcmp ("BATTV", key) == 0)
+ else if (strcmp ("BATTV", key) == 0)
apcups_detail->battv = value;
else if (strcmp ("ITEMP", key) == 0)
apcups_detail->itemp = value;
else if (strcmp ("LINEFREQ", key) == 0)
apcups_detail->linefreq = value;
else if (strcmp ("TIMELEFT", key) == 0)
+ {
+ /* Convert minutes to seconds if requested by
+ * the user. */
+ if (conf_report_seconds)
+ value *= 60.0;
apcups_detail->timeleft = value;
+ }
tokptr = strtok_r (NULL, ":", &toksaveptr);
} /* while (tokptr != NULL) */
}
-
+ status = errno; /* save errno, net_shutdown() may re-set it. */
+
+ if (close_socket)
+ net_shutdown (&global_sockfd);
+
if (n < 0)
{
- WARNING ("apcups plugin: Error reading from socket");
+ char errbuf[1024];
+ ERROR ("apcups plugin: Reading from socket failed: %s",
+ sstrerror (status, errbuf, sizeof (errbuf)));
return (-1);
}
}
conf_port = port_tmp;
}
+ else if (strcasecmp (key, "ReportSeconds") == 0)
+ {
+ if (IS_TRUE (value))
+ conf_report_seconds = 1;
+ else
+ conf_report_seconds = 0;
+ }
else
{
return (-1);
vl.values = values;
vl.values_len = 1;
- vl.time = time (NULL);
sstrncpy (vl.host, hostname_g, sizeof (vl.host));
sstrncpy (vl.plugin, "apcups", sizeof (vl.plugin));
sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
apcups_detail.battv = -1.0;
apcups_detail.loadpct = -1.0;
apcups_detail.bcharge = -1.0;
- apcups_detail.timeleft = -1.0;
+ apcups_detail.timeleft = NAN;
apcups_detail.itemp = -300.0;
apcups_detail.linefreq = -1.0;
-
+
status = apc_query_server (conf_host == NULL
? APCUPS_DEFAULT_HOST
: conf_host,
conf_port, &apcups_detail);
-
+
/*
* if we did not connect then do not bother submitting
* zeros. We want rrd files to have NAN.
projects / collectd.git / blobdiff