Merge branch 'collectd-3.11' into collectd-4.0

[collectd.git] / src / wireless.c

diff --git a/src/wireless.c b/src/wireless.c
index c771b9a..1067549 100644 (file)
--- a/src/wireless.c
+++ b/src/wireless.c
@@ -1,11 +1,10 @@
 /**
  * collectd - src/wireless.c
- * Copyright (C) 2006  Florian octo Forster
+ * Copyright (C) 2006,2007  Florian octo Forster
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * Free Software Foundation; only version 2 of the License is applicable.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -24,9 +23,6 @@
 #include "common.h"
 #include "plugin.h"
 
-#define MODULE_NAME "wireless"
-#define BUFSIZE 1024
-
 #if defined(KERNEL_LINUX)
 # define WIRELESS_HAVE_READ 1
 #else
@@ -35,47 +31,6 @@
 
 #define WIRELESS_PROC_FILE "/proc/net/wireless"
 
-static char *filename_template = "wireless-%s.rrd";
-
-static char *ds_def[] =
-{
-       "DS:quality:GAUGE:"COLLECTD_HEARTBEAT":0:U",
-       "DS:power:GAUGE:"COLLECTD_HEARTBEAT":U:0",
-       "DS:noise:GAUGE:"COLLECTD_HEARTBEAT":U:0",
-       NULL
-};
-static int ds_num = 3;
-
-#if WIRELESS_HAVE_READ
-static int proc_file_found = 0;
-#endif
-
-static void wireless_init (void)
-{
-#if WIRELESS_HAVE_READ
-       if (access (WIRELESS_PROC_FILE, R_OK) == 0)
-               proc_file_found = 1;
-       else
-               proc_file_found = 0;
-#endif
-
-       return;
-}
-
-static void wireless_write (char *host, char *inst, char *val)
-{
-       char file[BUFSIZE];
-       int status;
-
-       status = snprintf (file, BUFSIZE, filename_template, inst);
-       if (status < 1)
-               return;
-       else if (status >= BUFSIZE)
-               return;
-
-       rrd_update_file (host, file, val, ds_def, ds_num);
-}
-
 #if WIRELESS_HAVE_READ
 #if 0
 static double wireless_dbm_to_watt (double dbm)
@@ -93,20 +48,24 @@ static double wireless_dbm_to_watt (double dbm)
 }
 #endif
 
-static void wireless_submit (char *device,
-               double quality, double power, double noise)
+static void wireless_submit (const char *plugin_instance, const char *type,
+               double value)
 {
-       char buf[BUFSIZE];
-       int  status;
+       value_t values[1];
+       value_list_t vl = VALUE_LIST_INIT;
 
-       status = snprintf (buf, BUFSIZE, "%u:%f:%f:%f",
-                       (unsigned int) curtime,
-                       quality, power, noise);
-       if ((status < 1) || (status >= BUFSIZE))
-               return;
+       values[0].gauge = value;
 
-       plugin_submit (MODULE_NAME, device, buf);
-}
+       vl.values = values;
+       vl.values_len = 1;
+       vl.time = time (NULL);
+       strcpy (vl.host, hostname_g);
+       strcpy (vl.plugin, "wireless");
+       strncpy (vl.plugin_instance, plugin_instance,
+                       sizeof (vl.plugin_instance));
+
+       plugin_dispatch_values (type, &vl);
+} /* void wireless_submit */
 
 #define POWER_MIN -90.0
 #define POWER_MAX -50.0
@@ -117,12 +76,11 @@ static double wireless_percent_to_power (double quality)
        return ((quality * (POWER_MAX - POWER_MIN)) + POWER_MIN);
 } /* double wireless_percent_to_power */
 
-static void wireless_read (void)
+static int wireless_read (void)
 {
 #ifdef KERNEL_LINUX
-
        FILE *fh;
-       char buffer[BUFSIZE];
+       char buffer[1024];
 
        char   *device;
        double  quality;
@@ -132,19 +90,20 @@ static void wireless_read (void)
        char *fields[8];
        int   numfields;
 
+       int devices_found;
        int len;
 
-       if (!proc_file_found)
-               return;
-
        /* there are a variety of names for the wireless device */
        if ((fh = fopen (WIRELESS_PROC_FILE, "r")) == NULL)
        {
-               syslog (LOG_WARNING, "wireless: fopen: %s", strerror (errno));
-               return;
+               char errbuf[1024];
+               WARNING ("wireless: fopen: %s",
+                               sstrerror (errno, errbuf, sizeof (errbuf)));
+               return (-1);
        }
 
-       while (fgets (buffer, BUFSIZE, fh) != NULL)
+       devices_found = 0;
+       while (fgets (buffer, sizeof (buffer), fh) != NULL)
        {
                char *endptr;
 
@@ -184,20 +143,28 @@ static void wireless_read (void)
                else if (noise > 100.0)
                        noise = 1.0; /* invalid */
 
-               wireless_submit (device, quality, power, noise);
+               wireless_submit (device, "signal_quality", quality);
+               wireless_submit (device, "signal_power", power);
+               wireless_submit (device, "signal_noise", noise);
+
+               devices_found++;
        }
 
        fclose (fh);
+
+       /* If no wireless devices are present return an error, so the plugin
+        * code delays our read function. */
+       if (devices_found == 0)
+               return (-1);
 #endif /* KERNEL_LINUX */
-}
-#else
-# define wireless_read NULL
+
+       return (0);
+} /* int wireless_read */
 #endif /* WIRELESS_HAVE_READ */
 
 void module_register (void)
 {
-       plugin_register (MODULE_NAME, wireless_init, wireless_read, wireless_write);
-}
-
-#undef BUFSIZE
-#undef MODULE_NAME
+#if WIRELESS_HAVE_READ
+       plugin_register_read ("wireless", wireless_read);
+#endif /* WIRELESS_HAVE_READ */
+} /* void module_register */