Added `apcups.c' by Anthony Gialluca <tonyabg at charter.net>

diff --git a/src/apcups.c b/src/apcups.c
new file mode 100644 (file)
index 0000000..50e6fe8
--- /dev/null
+++ b/src/apcups.c
@@ -0,0 +1,827 @@
+ /*
+ * Copyright (C) 2000-2004 Kern Sibbald
+ * Copyright (C) 1996-99 Andre M. Hedrick <andre@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
+ * Public License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+# include <stdio.h>
+# include <stdlib.h>
+# include <stdarg.h>
+# include <unistd.h>
+#include <string.h>
+#include <strings.h>
+#include <signal.h>
+#include <ctype.h>
+#include <syslog.h>
+#include <limits.h>
+#include <pwd.h>
+#include <time.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <setjmp.h>
+#include <termios.h>
+#include <netdb.h>
+#include <sys/ioctl.h>
+#  include <sys/ipc.h>
+#  include <sys/sem.h>
+#  include <sys/shm.h>
+# include <sys/socket.h>
+# include <sys/types.h>
+# include <sys/time.h>
+# include <time.h>
+# include <sys/wait.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "collectd.h"
+#include "common.h" /* rrd_update_file */
+#include "plugin.h" /* plugin_register, plugin_submit */
+#include "configfile.h" /* cf_register */
+
+#define NISPORT 3551
+#define _(String) (String)
+#define N_(String) (String)
+#define MAXSTRING               256
+#define Error_abort0(fmd) error_out(__FILE__, __LINE__, fmd)
+#define MODULE_NAME "apcups"
+
+
+/* Prototypes */
+void generic_error_out(const char *, int , const char *, ...);
+
+/* Default values for contacting daemon */
+static char *host = "localhost";
+static int port = NISPORT;
+
+char argvalue[MAXSTRING];
+
+struct sockaddr_in tcp_serv_addr;  /* socket information */
+int net_errno = 0;                 /* error number -- not yet implemented */
+char *net_errmsg = NULL;           /* pointer to error message */
+char net_errbuf[256];              /* error message buffer for messages */
+
+void (*error_out) (const char *file, int line, const char *fmt, ...) = generic_error_out;
+void (*error_cleanup) (void) = NULL;
+
+/* 
+ * The following are only if not compiled to test the module with
+ * its own main.
+*/
+#ifndef APCMAIN
+static char *volt_file_template = "apcups_volt-%s.rrd";
+static char *volt_ds_def[] = 
+{
+       "DS:linev:GAUGE:"COLLECTD_HEARTBEAT":0:250",
+       "DS:outputv:GAUGE:"COLLECTD_HEARTBEAT":0:250",
+       NULL
+};
+static int volt_ds_num = 2;
+
+static char *bvolt_file_template = "apcups_bvolt-%s.rrd";
+static char *bvolt_ds_def[] = 
+{
+       "DS:battv:GAUGE:"COLLECTD_HEARTBEAT":0:100",
+};
+static int bvolt_ds_num = 1;
+
+static char *load_file_template = "apcups_load-%s.rrd";
+static char *load_ds_def[] = 
+{
+       "DS:loadpct:GAUGE:"COLLECTD_HEARTBEAT":0:120",
+};
+static int load_ds_num = 1;
+
+static char *charge_file_template = "apcups_charge-%s.rrd";
+static char *charge_ds_def[] = 
+{
+       "DS:bcharge:GAUGE:"COLLECTD_HEARTBEAT":0:100",
+};
+static int charge_ds_num = 1;
+
+static char *time_file_template = "apcups_time-%s.rrd";
+static char *time_ds_def[] = 
+{
+       "DS:timeleft:GAUGE:"COLLECTD_HEARTBEAT":0:100",
+};
+static int time_ds_num = 1;
+
+static char *temp_file_template = "apcups_temp-%s.rrd";
+static char *temp_ds_def[] = 
+{
+       "DS:itemp:GAUGE:"COLLECTD_HEARTBEAT":0:100",
+};
+static int temp_ds_num = 1;
+
+static char *freq_file_template = "apcups_freq-%s.rrd";
+static char *freq_ds_def[] = 
+{
+       "DS:linefreq:GAUGE:"COLLECTD_HEARTBEAT":0:65",
+};
+static int freq_ds_num = 1;
+
+static char *config_keys[] =
+{
+       "Host",
+       "Port",
+       NULL
+};
+static int config_keys_num = 2;
+
+#endif /* ifndef APCMAIN */
+
+struct apc_detail_s {
+  float linev;
+  float loadpct;
+  float bcharge;
+  float timeleft;
+  float outputv;
+  float itemp;
+  float battv;
+  float linefreq;
+};
+
+/* Guarantee that the string is properly terminated */
+char *astrncpy(char *dest, const char *src, int maxlen)
+{
+   strncpy(dest, src, maxlen - 1);
+   dest[maxlen - 1] = 0;
+   return dest;
+}
+
+
+#define BIG_BUF 5000
+
+/* Implement snprintf */
+int asnprintf(char *str, size_t size, const char *fmt, ...)
+{
+#ifdef HAVE_VSNPRINTF
+   va_list arg_ptr;
+   int len;
+
+   va_start(arg_ptr, fmt);
+   len = vsnprintf(str, size, fmt, arg_ptr);
+   va_end(arg_ptr);
+
+   str[size - 1] = 0;
+   return len;
+
+#else
+
+   va_list arg_ptr;
+   int len;
+   char *buf;
+
+   buf = (char *)malloc(BIG_BUF);
+
+   va_start(arg_ptr, fmt);
+   len = vsprintf(buf, fmt, arg_ptr);
+   va_end(arg_ptr);
+
+   if (len >= BIG_BUF)
+      Error_abort0(_("Buffer overflow.\n"));
+
+   memcpy(str, buf, size);
+   str[size - 1] = 0;
+
+   free(buf);
+   return len;
+#endif
+}
+
+/* Implement vsnprintf() */
+int avsnprintf(char *str, size_t size, const char *format, va_list ap)
+{
+#ifdef HAVE_VSNPRINTF
+   int len;
+
+   len = vsnprintf(str, size, format, ap);
+   str[size - 1] = 0;
+
+   return len;
+
+#else
+
+   int len;
+   char *buf;
+
+   buf = (char *)malloc(BIG_BUF);
+
+   len = vsprintf(buf, format, ap);
+   if (len >= BIG_BUF)
+      Error_abort0(_("Buffer overflow.\n"));
+
+   memcpy(str, buf, size);
+   str[size - 1] = 0;
+
+   free(buf);
+   return len;
+#endif
+}
+
+/*
+ * Subroutine normally called by macro error_abort() to print
+ * FATAL ERROR message and supplied error message
+ */
+void generic_error_out(const char *file, int line, const char *fmt, ...)
+{
+   char buf[256];
+   va_list arg_ptr;
+   int i;
+
+   asnprintf(buf, sizeof(buf), _("FATAL ERROR in %s at line %d\n"), file, line);
+   i = strlen(buf);
+   va_start(arg_ptr, fmt);
+   avsnprintf((char *)&buf[i], sizeof(buf) - i, (char *)fmt, arg_ptr);
+   va_end(arg_ptr);
+   fprintf(stdout, "%s", buf);
+
+   if (error_cleanup)
+      error_cleanup();
+
+   exit(1);
+}
+
+/*
+ * Read nbytes from the network.
+ * It is possible that the total bytes require in several
+ * read requests
+ */
+static int read_nbytes(int fd, char *ptr, int nbytes)
+{
+   int nleft, nread;
+
+
+   nleft = nbytes;
+
+   while (nleft > 0) {
+      do {
+         nread = read(fd, ptr, nleft);
+      } while (nread == -1 && (errno == EINTR || errno == EAGAIN));
+
+      if (nread <= 0) {
+         net_errno = errno;
+         return (nread);           /* error, or EOF */
+      }
+
+      nleft -= nread;
+      ptr += nread;
+   }
+
+   return (nbytes - nleft);        /* return >= 0 */
+}
+
+
+/*
+ * Write nbytes to the network.
+ * It may require several writes.
+ */
+static int write_nbytes(int fd, char *ptr, int nbytes)
+{
+   int nleft, nwritten;
+
+   nleft = nbytes;
+   while (nleft > 0) {
+      nwritten = write(fd, ptr, nleft);
+
+      if (nwritten <= 0) {
+         net_errno = errno;
+         return (nwritten);        /* error */
+      }
+
+      nleft -= nwritten;
+      ptr += nwritten;
+   }
+
+   return (nbytes - nleft);
+}
+
+
+/* Close the network connection */
+void net_close(int sockfd)
+{
+   short pktsiz = 0;
+
+   /* send EOF sentinel */
+   write_nbytes(sockfd, (char *)&pktsiz, sizeof(short));
+   close(sockfd);
+}
+
+
+/*     
+ * Open a TCP connection to the UPS network server
+ * Returns -1 on error
+ * Returns socket file descriptor otherwise
+ */
+int net_open(char *host, char *service, int port)
+{
+   int sockfd;
+   struct hostent *hp;
+   unsigned int inaddr;            /* Careful here to use unsigned int for */
+                                   /* compatibility with Alpha */
+
+   /* 
+    * Fill in the structure serv_addr with the address of
+    * the server that we want to connect with.
+    */
+   memset((char *)&tcp_serv_addr, 0, sizeof(tcp_serv_addr));
+   tcp_serv_addr.sin_family = AF_INET;
+   tcp_serv_addr.sin_port = htons(port);
+
+   if ((inaddr = inet_addr(host)) != INADDR_NONE) {
+      tcp_serv_addr.sin_addr.s_addr = inaddr;
+   } else {
+      if ((hp = gethostbyname(host)) == NULL) {
+         net_errmsg = "tcp_open: hostname error\n";
+         return -1;
+      }
+
+      if (hp->h_length != sizeof(inaddr) || hp->h_addrtype != AF_INET) {
+         net_errmsg = "tcp_open: funny gethostbyname value\n";
+         return -1;
+      }
+
+      tcp_serv_addr.sin_addr.s_addr = *(unsigned int *)hp->h_addr;
+   }
+
+
+   /* Open a TCP socket */
+   if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+      net_errmsg = "tcp_open: cannot open stream socket\n";
+      return -1;
+   }
+
+   /* connect to server */
+#if defined HAVE_OPENBSD_OS || defined HAVE_FREEBSD_OS
+   /* 
+    * Work around a bug in OpenBSD & FreeBSD userspace pthreads
+    * implementations. Rationale is the same as described above.
+    */
+   fcntl(sockfd, F_SETFL, fcntl(sockfd, F_GETFL));
+#endif
+
+   if (connect(sockfd, (struct sockaddr *)&tcp_serv_addr, sizeof(tcp_serv_addr)) < 0) {
+      asnprintf(net_errbuf, sizeof(net_errbuf),
+         _("tcp_open: cannot connect to server %s on port %d.\n"
+        "ERR=%s\n"), host, port, strerror(errno));
+      net_errmsg = net_errbuf;
+      close(sockfd);
+      return -1;
+   }
+
+   return sockfd;
+}
+
+
+
+/* 
+ * 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.
+ * Returns number of bytes read
+ * Returns 0 on end of file
+ * Returns -1 on hard end of file (i.e. network connection close)
+ * Returns -2 on error
+ */
+int net_recv(int sockfd, char *buff, int maxlen)
+{
+   int nbytes;
+   short pktsiz;
+
+   /* get data size -- in short */
+   if ((nbytes = read_nbytes(sockfd, (char *)&pktsiz, sizeof(short))) <= 0) {
+      /* probably pipe broken because client died */
+      return -1;                   /* assume hard EOF received */
+   }
+   if (nbytes != sizeof(short))
+      return -2;
+
+   pktsiz = ntohs(pktsiz);         /* decode no. of bytes that follow */
+   if (pktsiz > maxlen) {
+      net_errmsg = "net_recv: record length too large\n";
+      return -2;
+   }
+   if (pktsiz == 0)
+      return 0;                    /* soft EOF */
+
+   /* now read the actual data */
+   if ((nbytes = read_nbytes(sockfd, buff, pktsiz)) <= 0) {
+      net_errmsg = "net_recv: read_nbytes error\n";
+      return -2;
+   }
+   if (nbytes != pktsiz) {
+      net_errmsg = "net_recv: error in read_nbytes\n";
+      return -2;
+   }
+
+   return (nbytes);                /* return actual length of message */
+}
+
+/*
+ * Send a message over the network. The send consists of
+ * two network packets. The first is sends a short containing
+ * the length of the data packet which follows.
+ * Returns number of bytes sent
+ * Returns -1 on error
+ */
+int net_send(int sockfd, char *buff, int len)
+{
+   int rc;
+   short pktsiz;
+
+   /* send short containing size of data packet */
+   pktsiz = htons((short)len);
+   rc = write_nbytes(sockfd, (char *)&pktsiz, sizeof(short));
+   if (rc != sizeof(short)) {
+      net_errmsg = "net_send: write_nbytes error of length prefix\n";
+      return -1;
+   }
+
+   /* send data packet */
+   rc = write_nbytes(sockfd, buff, len);
+   if (rc != len) {
+      net_errmsg = "net_send: write_nbytes error\n";
+      return -1;
+   }
+
+   return rc;
+}
+
+
+/* Get and print status from apcupsd NIS server */
+static void do_pthreads_status(char *host, int port, struct apc_detail_s *apcups_detail)
+{
+  int sockfd, n;
+  char recvline[MAXSTRING + 1];
+  char *tokptr;
+
+  if ((sockfd = net_open(host, NULL, port)) < 0)
+    Error_abort0(net_errmsg);
+  
+  net_send(sockfd, "status", 6);
+  
+  while ((n = net_recv(sockfd, recvline, sizeof(recvline))) > 0) {
+    recvline[n] = 0;
+#ifdef APCMAIN
+    fputs(recvline, stdout);
+    int printit = 1;
+#else
+    int printit = 0;
+#endif /* ifdef APCMAIN */
+
+    tokptr = strtok(recvline,":");
+    while(tokptr != NULL) {
+      /* Look for Limit_Add */
+      if(strncmp("LINEV",tokptr,5) == 0) { 
+       if(printit) fprintf(stdout,"  Found LINEV.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->linev = atof (tokptr);
+      }else if(strncmp("BATTV",tokptr,5) == 0) { 
+       if(printit) fprintf(stdout,"  Found BATTV.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->battv = atof (tokptr);
+      }else if(strncmp("ITEMP",tokptr,5) == 0) { 
+       if(printit) fprintf(stdout,"  Found ITEMP.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->itemp = atof (tokptr);
+      }else if(strncmp("LOADPCT",tokptr,7) == 0) { 
+       if(printit) fprintf(stdout,"  Found LOADPCT.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->loadpct = atof (tokptr);
+      }else if(strncmp("BCHARGE",tokptr,7) == 0) { 
+       if(printit) fprintf(stdout,"  Found BCHARGE.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->bcharge = atof (tokptr);
+      }else if(strncmp("OUTPUTV",tokptr,7) == 0) { 
+       if(printit) fprintf(stdout,"  Found OUTPUTV.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->outputv = atof (tokptr);
+      }else if(strncmp("LINEFREQ",tokptr,8) == 0) { 
+       if(printit) fprintf(stdout,"  Found LINEFREQ.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->linefreq = atof (tokptr);
+      }else if(strncmp("TIMELEFT",tokptr,8) == 0) { 
+       if(printit) fprintf(stdout,"  Found TIMELEFT.\n");
+       tokptr = strtok(NULL," \t");
+       if(tokptr == NULL) continue;
+       if(printit) fprintf(stdout,"  Value %s.\n",tokptr);
+       apcups_detail->timeleft = atof (tokptr);
+      } /* */
+      tokptr = strtok(NULL,":");
+    }
+  }
+
+  if (n < 0)
+    Error_abort0(net_errmsg);
+  
+  net_close(sockfd);
+}
+
+#ifdef APCMAIN
+int main(int argc, char **argv)
+{
+  /* we are not really going to use this */
+  struct apc_detail_s apcups_detail;
+
+  if (!*host || strcmp(host, "0.0.0.0") == 0)
+    host = "localhost";
+  
+  do_pthreads_status(host, port, &apcups_detail);
+  
+  return 0;
+}
+#else
+static void apcups_init (void)
+{
+       return;
+}
+
+static int apcups_config (char *key, char *value)
+{
+  static char lhost[126];
+  
+  if (strcasecmp (key, "host") == 0)
+    {
+      lhost[0] = '\0';
+      strcpy(lhost,key);
+      host = lhost;
+    }
+  else if (strcasecmp (key, "Port") == 0)
+    {
+      int port_tmp = atoi (value);
+      if(port_tmp < 1 || port_tmp > 65535) {
+       syslog (LOG_WARNING, "apcups: `port' failed: %s",
+               value);
+       return (1);
+      } else {
+       port = port_tmp;
+      }
+    }
+  else
+    {
+      return (-1);
+    }
+  return(0);
+}
+
+#define BUFSIZE 256
+static void apcups_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->linev,
+                     apcups_detail->outputv) >= BUFSIZE)
+         return;
+       
+       plugin_submit (MODULE_NAME, host, buf);
+}
+
+static void apc_bvolt_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->battv) >= BUFSIZE)
+         return;
+       
+       plugin_submit ("apcups_bvolt", host, buf);
+}
+
+static void apc_load_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->loadpct) >= BUFSIZE)
+         return;
+       
+       plugin_submit ("apcups_load", host, buf);
+}
+
+static void apc_charge_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->bcharge) >= BUFSIZE)
+         return;
+       
+       plugin_submit ("apcups_charge", host, buf);
+}
+
+static void apc_temp_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->itemp) >= BUFSIZE)
+         return;
+       
+       plugin_submit ("apcups_temp", host, buf);
+}
+
+static void apc_time_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->timeleft) >= BUFSIZE)
+         return;
+       
+       plugin_submit ("apcups_time", host, buf);
+}
+
+static void apc_freq_submit (char *host,
+                          struct apc_detail_s *apcups_detail)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, "%u:%f",
+                     (unsigned int) curtime,
+                     apcups_detail->linefreq) >= BUFSIZE)
+         return;
+       
+       plugin_submit ("apcups_freq", host, buf);
+}
+#undef BUFSIZE
+
+static void apcups_read (void)
+{
+  struct apc_detail_s apcups_detail;
+       
+  apcups_detail.linev = 0.0;
+  apcups_detail.loadpct = 0.0;
+  apcups_detail.bcharge = 0.0;
+  apcups_detail.timeleft = 0.0;
+  apcups_detail.outputv = 0.0;
+  apcups_detail.itemp = 0.0;
+  apcups_detail.battv = 0.0;
+  apcups_detail.linefreq = 0.0;
+
+  
+  if (!*host || strcmp(host, "0.0.0.0") == 0)
+    host = "localhost";
+  
+  do_pthreads_status(host, port, &apcups_detail);
+ 
+  apcups_submit (host, &apcups_detail);
+  apc_bvolt_submit (host, &apcups_detail);
+  apc_load_submit (host, &apcups_detail);
+  apc_charge_submit (host, &apcups_detail);
+  apc_temp_submit (host, &apcups_detail);
+  apc_time_submit (host, &apcups_detail);
+  apc_freq_submit (host, &apcups_detail);
+}
+
+
+static void apcups_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, volt_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, volt_ds_def, volt_ds_num);
+}
+
+static void apc_bvolt_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, bvolt_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, bvolt_ds_def, bvolt_ds_num);
+}
+
+static void apc_load_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, load_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, load_ds_def, load_ds_num);
+}
+
+static void apc_charge_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, charge_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, charge_ds_def, charge_ds_num);
+}
+
+static void apc_temp_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, temp_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, temp_ds_def, temp_ds_num);
+}
+
+static void apc_time_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, time_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, time_ds_def, time_ds_num);
+}
+
+static void apc_freq_write (char *host, char *inst, char *val)
+{
+  char file[512];
+  int status;
+  
+  status = snprintf (file, 512, freq_file_template, inst);
+  if (status < 1)
+    return;
+  else if (status >= 512)
+    return;
+  
+  rrd_update_file (host, file, val, freq_ds_def, freq_ds_num);
+}
+
+void module_register (void)
+{
+       plugin_register (MODULE_NAME, apcups_init, apcups_read, apcups_write);
+       plugin_register ("apcups_bvolt", NULL, NULL, apc_bvolt_write);
+       plugin_register ("apcups_load", NULL, NULL, apc_load_write);
+       plugin_register ("apcups_charge", NULL, NULL, apc_charge_write);
+       plugin_register ("apcups_temp", NULL, NULL, apc_temp_write);
+       plugin_register ("apcups_time", NULL, NULL, apc_time_write);
+       plugin_register ("apcups_freq", NULL, NULL, apc_freq_write);
+       cf_register (MODULE_NAME, apcups_config, config_keys, config_keys_num);
+}
+
+#endif /* ifdef APCMAIN */
+#undef MODULE_NAME