Merge branch 'collectd-5.7' into collectd-5.8
[collectd.git] / src / collectd-nagios.c
index 8b0f867..89f73b8 100644 (file)
  **/
 
 #if HAVE_CONFIG_H
-# include "config.h"
+#include "config.h"
 #endif
 
 #if !defined(__GNUC__) || !__GNUC__
-# define __attribute__(x) /**/
+#define __attribute__(x) /**/
 #endif
 
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
+#include <assert.h>
 #include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <strings.h>
-#include <assert.h>
+#include <unistd.h>
 
 #if NAN_STATIC_DEFAULT
-# include <math.h>
+#include <math.h>
 /* #endif NAN_STATIC_DEFAULT*/
 #elif NAN_STATIC_ISOC
-# ifndef __USE_ISOC99
-#  define DISABLE_ISOC99 1
-#  define __USE_ISOC99 1
-# endif /* !defined(__USE_ISOC99) */
-# include <math.h>
-# if DISABLE_ISOC99
-#  undef DISABLE_ISOC99
-#  undef __USE_ISOC99
-# endif /* DISABLE_ISOC99 */
+#ifndef __USE_ISOC99
+#define DISABLE_ISOC99 1
+#define __USE_ISOC99 1
+#endif /* !defined(__USE_ISOC99) */
+#include <math.h>
+#if DISABLE_ISOC99
+#undef DISABLE_ISOC99
+#undef __USE_ISOC99
+#endif /* DISABLE_ISOC99 */
 /* #endif NAN_STATIC_ISOC */
 #elif NAN_ZERO_ZERO
-# include <math.h>
-# ifdef NAN
-#  undef NAN
-# endif
-# define NAN (0.0 / 0.0)
-# ifndef isnan
-#  define isnan(f) ((f) != (f))
-# endif /* !defined(isnan) */
-# ifndef isfinite
-#  define isfinite(f) (((f) - (f)) == 0.0)
-# endif
-# ifndef isinf
-#  define isinf(f) (!isfinite(f) && !isnan(f))
-# endif
+#include <math.h>
+#ifdef NAN
+#undef NAN
+#endif
+#define NAN (0.0 / 0.0)
+#ifndef isnan
+#define isnan(f) ((f) != (f))
+#endif /* !defined(isnan) */
+#ifndef isfinite
+#define isfinite(f) (((f) - (f)) == 0.0)
+#endif
+#ifndef isinf
+#define isinf(f) (!isfinite(f) && !isnan(f))
+#endif
 #endif /* NAN_ZERO_ZERO */
 
-#include "libcollectdclient/collectd/client.h"
+#include "collectd/client.h"
 
-#define RET_OKAY     0
-#define RET_WARNING  1
+#define RET_OKAY 0
+#define RET_WARNING 1
 #define RET_CRITICAL 2
-#define RET_UNKNOWN  3
+#define RET_UNKNOWN 3
 
-#define CON_NONE     0
-#define CON_AVERAGE  1
-#define CON_SUM      2
-#define CON_PERCENTAGE  3
+#define CON_NONE 0
+#define CON_AVERAGE 1
+#define CON_SUM 2
+#define CON_PERCENTAGE 3
 
-struct range_s
-{
-       double min;
-       double max;
-       int    invert;
+struct range_s {
+  double min;
+  double max;
+  int invert;
 };
 typedef struct range_s range_t;
 
@@ -104,644 +103,565 @@ static int consolitation_g = CON_NONE;
 static _Bool nan_is_error_g = 0;
 
 static char **match_ds_g = NULL;
-static int    match_ds_num_g = 0;
+static size_t match_ds_num_g = 0;
 
 /* `strdup' is an XSI extension. I don't want to pull in all of XSI just for
  * that, so here's an own implementation.. It's easy enough. The GCC attributes
  * are supposed to get good performance..  -octo */
-__attribute__((malloc, nonnull (1)))
-static char *cn_strdup (const char *str) /* {{{ */
+__attribute__((malloc, nonnull(1))) static char *
+cn_strdup(const char *str) /* {{{ */
 {
   size_t strsize;
   char *ret;
 
-  strsize = strlen (str) + 1;
-  ret = (char *) malloc (strsize);
+  strsize = strlen(str) + 1;
+  ret = (char *)malloc(strsize);
   if (ret != NULL)
-    memcpy (ret, str, strsize);
-  return (ret);
+    memcpy(ret, str, strsize);
+  return ret;
 } /* }}} char *cn_strdup */
 
-static int filter_ds (size_t *values_num,
-               double **values, char ***values_names)
-{
-       gauge_t *new_values;
-       char   **new_names;
-
-       size_t i;
-
-       if (match_ds_g == NULL)
-               return (RET_OKAY);
-
-       new_values = (gauge_t *)calloc (match_ds_num_g, sizeof (*new_values));
-       if (new_values == NULL)
-       {
-               fprintf (stderr, "malloc failed: %s\n", strerror (errno));
-               return (RET_UNKNOWN);
-       }
-
-       new_names = (char **)calloc (match_ds_num_g, sizeof (*new_names));
-       if (new_names == NULL)
-       {
-               fprintf (stderr, "malloc failed: %s\n", strerror (errno));
-               free (new_values);
-               return (RET_UNKNOWN);
-       }
-
-       for (i = 0; i < (size_t) match_ds_num_g; i++)
-       {
-               size_t j;
-
-               /* match_ds_g keeps pointers into argv but the names will be freed */
-               new_names[i] = cn_strdup (match_ds_g[i]);
-               if (new_names[i] == NULL)
-               {
-                       fprintf (stderr, "cn_strdup failed: %s\n", strerror (errno));
-                       free (new_values);
-                       for (j = 0; j < i; j++)
-                               free (new_names[j]);
-                       free (new_names);
-                       return (RET_UNKNOWN);
-               }
-
-               for (j = 0; j < *values_num; j++)
-                       if (strcasecmp (new_names[i], (*values_names)[j]) == 0)
-                               break;
-
-               if (j == *values_num)
-               {
-                       printf ("ERROR: DS `%s' is not available.\n", new_names[i]);
-                       free (new_values);
-                       for (j = 0; j <= i; j++)
-                               free (new_names[j]);
-                       free (new_names);
-                       return (RET_CRITICAL);
-               }
-
-               new_values[i] = (*values)[j];
-       }
-
-       free (*values);
-       for (i = 0; i < *values_num; i++)
-               free ((*values_names)[i]);
-       free (*values_names);
-
-       *values       = new_values;
-       *values_names = new_names;
-       *values_num   = match_ds_num_g;
-       return (RET_OKAY);
+static int filter_ds(size_t *values_num, double **values,
+                     char ***values_names) {
+  gauge_t *new_values;
+  char **new_names;
+
+  if (match_ds_g == NULL)
+    return RET_OKAY;
+
+  new_values = (gauge_t *)calloc(match_ds_num_g, sizeof(*new_values));
+  if (new_values == NULL) {
+    fprintf(stderr, "calloc failed: %s\n", strerror(errno));
+    return RET_UNKNOWN;
+  }
+
+  new_names = (char **)calloc(match_ds_num_g, sizeof(*new_names));
+  if (new_names == NULL) {
+    fprintf(stderr, "calloc failed: %s\n", strerror(errno));
+    free(new_values);
+    return RET_UNKNOWN;
+  }
+
+  for (size_t i = 0; i < match_ds_num_g; i++) {
+    size_t j;
+
+    /* match_ds_g keeps pointers into argv but the names will be freed */
+    new_names[i] = cn_strdup(match_ds_g[i]);
+    if (new_names[i] == NULL) {
+      fprintf(stderr, "cn_strdup failed: %s\n", strerror(errno));
+      free(new_values);
+      for (j = 0; j < i; j++)
+        free(new_names[j]);
+      free(new_names);
+      return RET_UNKNOWN;
+    }
+
+    for (j = 0; j < *values_num; j++)
+      if (strcasecmp(new_names[i], (*values_names)[j]) == 0)
+        break;
+
+    if (j == *values_num) {
+      printf("ERROR: DS `%s' is not available.\n", new_names[i]);
+      free(new_values);
+      for (j = 0; j <= i; j++)
+        free(new_names[j]);
+      free(new_names);
+      return RET_CRITICAL;
+    }
+
+    new_values[i] = (*values)[j];
+  }
+
+  free(*values);
+  for (size_t i = 0; i < *values_num; i++)
+    free((*values_names)[i]);
+  free(*values_names);
+
+  *values = new_values;
+  *values_names = new_names;
+  *values_num = match_ds_num_g;
+  return RET_OKAY;
 } /* int filter_ds */
 
-static void parse_range (char *string, range_t *range)
-{
-       char *min_ptr;
-       char *max_ptr;
-
-       if (*string == '@')
-       {
-               range->invert = 1;
-               string++;
-       }
-
-       max_ptr = strchr (string, ':');
-       if (max_ptr == NULL)
-       {
-               min_ptr = NULL;
-               max_ptr = string;
-       }
-       else
-       {
-               min_ptr = string;
-               *max_ptr = '\0';
-               max_ptr++;
-       }
-
-       assert (max_ptr != NULL);
-
-       /* `10' == `0:10' */
-       if (min_ptr == NULL)
-               range->min = 0.0;
-       /* :10 == ~:10 == -inf:10 */
-       else if ((*min_ptr == '\0') || (*min_ptr == '~'))
-               range->min = NAN;
-       else
-               range->min = atof (min_ptr);
-
-       if ((*max_ptr == '\0') || (*max_ptr == '~'))
-               range->max = NAN;
-       else
-               range->max = atof (max_ptr);
+static void parse_range(char *string, range_t *range) {
+  char *min_ptr;
+  char *max_ptr;
+
+  if (*string == '@') {
+    range->invert = 1;
+    string++;
+  }
+
+  max_ptr = strchr(string, ':');
+  if (max_ptr == NULL) {
+    min_ptr = NULL;
+    max_ptr = string;
+  } else {
+    min_ptr = string;
+    *max_ptr = '\0';
+    max_ptr++;
+  }
+
+  assert(max_ptr != NULL);
+
+  /* `10' == `0:10' */
+  if (min_ptr == NULL)
+    range->min = 0.0;
+  /* :10 == ~:10 == -inf:10 */
+  else if ((*min_ptr == '\0') || (*min_ptr == '~'))
+    range->min = NAN;
+  else
+    range->min = atof(min_ptr);
+
+  if ((*max_ptr == '\0') || (*max_ptr == '~'))
+    range->max = NAN;
+  else
+    range->max = atof(max_ptr);
 } /* void parse_range */
 
-static int match_range (range_t *range, double value)
-{
-       int ret = 0;
+static int match_range(range_t *range, double value) {
+  int ret = 0;
 
-       if (!isnan (range->min) && (range->min > value))
-               ret = 1;
-       if (!isnan (range->max) && (range->max < value))
-               ret = 1;
+  if (!isnan(range->min) && (range->min > value))
+    ret = 1;
+  if (!isnan(range->max) && (range->max < value))
+    ret = 1;
 
-       return (((ret - range->invert) == 0) ? 0 : 1);
+  return ((ret - range->invert) == 0) ? 0 : 1;
 } /* int match_range */
 
-static void usage (const char *name)
-{
-       fprintf (stderr, "Usage: %s <-s socket> <-n value_spec> <-H hostname> [options]\n"
-                       "\n"
-                       "Valid options are:\n"
-                       "  -s <socket>    Path to collectd's UNIX-socket.\n"
-                       "  -n <v_spec>    Value specification to get from collectd.\n"
-                       "                 Format: `plugin-instance/type-instance'\n"
-                       "  -d <ds>        Select the DS to examine. May be repeated to examine multiple\n"
-                       "                 DSes. By default all DSes are used.\n"
-                       "  -g <consol>    Method to use to consolidate several DSes.\n"
-                       "                 See below for a list of valid arguments.\n"
-                       "  -H <host>      Hostname to query the values for.\n"
-                       "  -c <range>     Critical range\n"
-                       "  -w <range>     Warning range\n"
-                       "  -m             Treat \"Not a Number\" (NaN) as critical (default: warning)\n"
-                       "\n"
-                       "Consolidation functions:\n"
-                       "  none:          Apply the warning- and critical-ranges to each data-source\n"
-                       "                 individually.\n"
-                       "  average:       Calculate the average of all matching DSes and apply the\n"
-                       "                 warning- and critical-ranges to the calculated average.\n"
-                       "  sum:           Apply the ranges to the sum of all DSes.\n"
-                       "  percentage:    Apply the ranges to the ratio (in percent) of the first value\n"
-                       "                 and the sum of all values."
-                       "\n", name);
-       exit (1);
+__attribute__((noreturn)) static void usage(const char *name) {
+  fprintf(stderr,
+          "Usage: %s <-s socket> <-n value_spec> <-H hostname> [options]\n"
+          "\n"
+          "Valid options are:\n"
+          "  -s <socket>    Path to collectd's UNIX-socket.\n"
+          "  -n <v_spec>    Value specification to get from collectd.\n"
+          "                 Format: `plugin-instance/type-instance'\n"
+          "  -d <ds>        Select the DS to examine. May be repeated to "
+          "examine multiple\n"
+          "                 DSes. By default all DSes are used.\n"
+          "  -g <consol>    Method to use to consolidate several DSes.\n"
+          "                 See below for a list of valid arguments.\n"
+          "  -H <host>      Hostname to query the values for.\n"
+          "  -c <range>     Critical range\n"
+          "  -w <range>     Warning range\n"
+          "  -m             Treat \"Not a Number\" (NaN) as critical (default: "
+          "warning)\n"
+          "\n"
+          "Consolidation functions:\n"
+          "  none:          Apply the warning- and critical-ranges to each "
+          "data-source\n"
+          "                 individually.\n"
+          "  average:       Calculate the average of all matching DSes and "
+          "apply the\n"
+          "                 warning- and critical-ranges to the calculated "
+          "average.\n"
+          "  sum:           Apply the ranges to the sum of all DSes.\n"
+          "  percentage:    Apply the ranges to the ratio (in percent) of the "
+          "first value\n"
+          "                 and the sum of all values."
+          "\n",
+          name);
+  exit(1);
 } /* void usage */
 
-static int do_listval (lcc_connection_t *connection)
-{
-       lcc_identifier_t *ret_ident = NULL;
-       size_t ret_ident_num = 0;
-
-       char *hostname = NULL;
-
-       int status;
-       size_t i;
-
-       status = lcc_listval (connection, &ret_ident, &ret_ident_num);
-       if (status != 0) {
-               printf ("UNKNOWN: %s\n", lcc_strerror (connection));
-               if (ret_ident != NULL)
-                       free (ret_ident);
-               return (RET_UNKNOWN);
-       }
-
-       status = lcc_sort_identifiers (connection, ret_ident, ret_ident_num);
-       if (status != 0) {
-               printf ("UNKNOWN: %s\n", lcc_strerror (connection));
-               if (ret_ident != NULL)
-                       free (ret_ident);
-               return (RET_UNKNOWN);
-       }
-
-       for (i = 0; i < ret_ident_num; ++i) {
-               char id[1024];
-
-               if ((hostname_g != NULL) && (strcasecmp (hostname_g, ret_ident[i].host)))
-                       continue;
-
-               if ((hostname == NULL) || strcasecmp (hostname, ret_ident[i].host))
-               {
-                       free (hostname);
-                       hostname = strdup (ret_ident[i].host);
-                       printf ("Host: %s\n", hostname);
-               }
-
-               /* empty hostname; not to be printed again */
-               ret_ident[i].host[0] = '\0';
-
-               status = lcc_identifier_to_string (connection,
-                               id, sizeof (id), ret_ident + i);
-               if (status != 0) {
-                       printf ("ERROR: listval: Failed to convert returned "
-                                       "identifier to a string: %s\n",
-                                       lcc_strerror (connection));
-                       free (hostname);
-                       hostname = NULL;
-                       continue;
-               }
-
-               /* skip over the (empty) hostname and following '/' */
-               printf ("\t%s\n", id + 1);
-       }
-
-       free (ret_ident);
-       free (hostname);
-       return (RET_OKAY);
+static int do_listval(lcc_connection_t *connection) {
+  lcc_identifier_t *ret_ident = NULL;
+  size_t ret_ident_num = 0;
+
+  char *hostname = NULL;
+
+  int status;
+
+  status = lcc_listval(connection, &ret_ident, &ret_ident_num);
+  if (status != 0) {
+    printf("UNKNOWN: %s\n", lcc_strerror(connection));
+    if (ret_ident != NULL)
+      free(ret_ident);
+    return RET_UNKNOWN;
+  }
+
+  status = lcc_sort_identifiers(connection, ret_ident, ret_ident_num);
+  if (status != 0) {
+    printf("UNKNOWN: %s\n", lcc_strerror(connection));
+    if (ret_ident != NULL)
+      free(ret_ident);
+    return RET_UNKNOWN;
+  }
+
+  for (size_t i = 0; i < ret_ident_num; ++i) {
+    char id[1024];
+
+    if ((hostname_g != NULL) && (strcasecmp(hostname_g, ret_ident[i].host)))
+      continue;
+
+    if ((hostname == NULL) || strcasecmp(hostname, ret_ident[i].host)) {
+      free(hostname);
+      hostname = strdup(ret_ident[i].host);
+      printf("Host: %s\n", hostname);
+    }
+
+    /* empty hostname; not to be printed again */
+    ret_ident[i].host[0] = '\0';
+
+    status =
+        lcc_identifier_to_string(connection, id, sizeof(id), ret_ident + i);
+    if (status != 0) {
+      printf("ERROR: listval: Failed to convert returned "
+             "identifier to a string: %s\n",
+             lcc_strerror(connection));
+      free(hostname);
+      hostname = NULL;
+      continue;
+    }
+
+    /* skip over the (empty) hostname and following '/' */
+    printf("\t%s\n", id + 1);
+  }
+
+  free(ret_ident);
+  free(hostname);
+  return RET_OKAY;
 } /* int do_listval */
 
-static int do_check_con_none (size_t values_num,
-               double *values, char **values_names)
-{
-       int num_critical = 0;
-       int num_warning  = 0;
-       int num_okay = 0;
-       const char *status_str = "UNKNOWN";
-       int status_code = RET_UNKNOWN;
-       size_t i;
-
-       for (i = 0; i < values_num; i++)
-       {
-               if (isnan (values[i]))
-               {
-                       if (nan_is_error_g)
-                               num_critical++;
-                       else
-                               num_warning++;
-               }
-               else if (match_range (&range_critical_g, values[i]) != 0)
-                       num_critical++;
-               else if (match_range (&range_warning_g, values[i]) != 0)
-                       num_warning++;
-               else
-                       num_okay++;
-       }
-
-       if ((num_critical == 0) && (num_warning == 0) && (num_okay == 0))
-       {
-               printf ("WARNING: No defined values found\n");
-               return (RET_WARNING);
-       }
-       else if ((num_critical == 0) && (num_warning == 0))
-       {
-               status_str = "OKAY";
-               status_code = RET_OKAY;
-       }
-       else if (num_critical == 0)
-       {
-               status_str = "WARNING";
-               status_code = RET_WARNING;
-       }
-       else
-       {
-               status_str = "CRITICAL";
-               status_code = RET_CRITICAL;
-       }
-
-       printf ("%s: %i critical, %i warning, %i okay", status_str,
-                       num_critical, num_warning, num_okay);
-       if (values_num > 0)
-       {
-               printf (" |");
-               for (i = 0; i < values_num; i++)
-                       printf (" %s=%f;;;;", values_names[i], values[i]);
-       }
-       printf ("\n");
-
-       return (status_code);
+static int do_check_con_none(size_t values_num, double *values,
+                             char **values_names) {
+  int num_critical = 0;
+  int num_warning = 0;
+  int num_okay = 0;
+  const char *status_str = "UNKNOWN";
+  int status_code = RET_UNKNOWN;
+
+  for (size_t i = 0; i < values_num; i++) {
+    if (isnan(values[i])) {
+      if (nan_is_error_g)
+        num_critical++;
+      else
+        num_warning++;
+    } else if (match_range(&range_critical_g, values[i]) != 0)
+      num_critical++;
+    else if (match_range(&range_warning_g, values[i]) != 0)
+      num_warning++;
+    else
+      num_okay++;
+  }
+
+  if ((num_critical == 0) && (num_warning == 0) && (num_okay == 0)) {
+    printf("WARNING: No defined values found\n");
+    return RET_WARNING;
+  } else if ((num_critical == 0) && (num_warning == 0)) {
+    status_str = "OKAY";
+    status_code = RET_OKAY;
+  } else if (num_critical == 0) {
+    status_str = "WARNING";
+    status_code = RET_WARNING;
+  } else {
+    status_str = "CRITICAL";
+    status_code = RET_CRITICAL;
+  }
+
+  printf("%s: %i critical, %i warning, %i okay", status_str, num_critical,
+         num_warning, num_okay);
+  if (values_num > 0) {
+    printf(" |");
+    for (size_t i = 0; i < values_num; i++)
+      printf(" %s=%f;;;;", values_names[i], values[i]);
+  }
+  printf("\n");
+
+  return status_code;
 } /* int do_check_con_none */
 
-static int do_check_con_average (size_t values_num,
-               double *values, char **values_names)
-{
-       size_t i;
-       double total;
-       int total_num;
-       double average;
-       const char *status_str = "UNKNOWN";
-       int status_code = RET_UNKNOWN;
-
-       total = 0.0;
-       total_num = 0;
-       for (i = 0; i < values_num; i++)
-       {
-               if (isnan (values[i]))
-               {
-                       if (!nan_is_error_g)
-                               continue;
-
-                       printf ("CRITICAL: Data source \"%s\" is NaN\n",
-                                       values_names[i]);
-                       return (RET_CRITICAL);
-               }
-
-               total += values[i];
-               total_num++;
-       }
-
-       if (total_num == 0)
-       {
-               printf ("WARNING: No defined values found\n");
-               return (RET_WARNING);
-       }
-
-       average = total / total_num;
-
-       if (match_range (&range_critical_g, average) != 0)
-       {
-               status_str = "CRITICAL";
-               status_code = RET_CRITICAL;
-       }
-       else if (match_range (&range_warning_g, average) != 0)
-       {
-               status_str = "WARNING";
-               status_code = RET_WARNING;
-       }
-       else
-       {
-               status_str = "OKAY";
-               status_code = RET_OKAY;
-       }
-
-       printf ("%s: %g average |", status_str, average);
-       for (i = 0; i < values_num; i++)
-               printf (" %s=%f;;;;", values_names[i], values[i]);
-       printf ("\n");
-
-       return (status_code);
+static int do_check_con_average(size_t values_num, double *values,
+                                char **values_names) {
+  double total;
+  int total_num;
+  double average;
+  const char *status_str = "UNKNOWN";
+  int status_code = RET_UNKNOWN;
+
+  total = 0.0;
+  total_num = 0;
+  for (size_t i = 0; i < values_num; i++) {
+    if (isnan(values[i])) {
+      if (!nan_is_error_g)
+        continue;
+
+      printf("CRITICAL: Data source \"%s\" is NaN\n", values_names[i]);
+      return RET_CRITICAL;
+    }
+
+    total += values[i];
+    total_num++;
+  }
+
+  if (total_num == 0) {
+    printf("WARNING: No defined values found\n");
+    return RET_WARNING;
+  }
+
+  average = total / total_num;
+
+  if (match_range(&range_critical_g, average) != 0) {
+    status_str = "CRITICAL";
+    status_code = RET_CRITICAL;
+  } else if (match_range(&range_warning_g, average) != 0) {
+    status_str = "WARNING";
+    status_code = RET_WARNING;
+  } else {
+    status_str = "OKAY";
+    status_code = RET_OKAY;
+  }
+
+  printf("%s: %g average |", status_str, average);
+  for (size_t i = 0; i < values_num; i++)
+    printf(" %s=%f;;;;", values_names[i], values[i]);
+  printf("\n");
+
+  return status_code;
 } /* int do_check_con_average */
 
-static int do_check_con_sum (size_t values_num,
-               double *values, char **values_names)
-{
-       size_t i;
-       double total;
-       int total_num;
-       const char *status_str = "UNKNOWN";
-       int status_code = RET_UNKNOWN;
-
-       total = 0.0;
-       total_num = 0;
-       for (i = 0; i < values_num; i++)
-       {
-               if (isnan (values[i]))
-               {
-                       if (!nan_is_error_g)
-                               continue;
-
-                       printf ("CRITICAL: Data source \"%s\" is NaN\n",
-                                       values_names[i]);
-                       return (RET_CRITICAL);
-               }
-
-               total += values[i];
-               total_num++;
-       }
-
-       if (total_num == 0)
-       {
-               printf ("WARNING: No defined values found\n");
-               return (RET_WARNING);
-       }
-
-       if (match_range (&range_critical_g, total) != 0)
-       {
-               status_str = "CRITICAL";
-               status_code = RET_CRITICAL;
-       }
-       else if (match_range (&range_warning_g, total) != 0)
-       {
-               status_str = "WARNING";
-               status_code = RET_WARNING;
-       }
-       else
-       {
-               status_str = "OKAY";
-               status_code = RET_OKAY;
-       }
-
-       printf ("%s: %g sum |", status_str, total);
-       for (i = 0; i < values_num; i++)
-               printf (" %s=%f;;;;", values_names[i], values[i]);
-       printf ("\n");
-
-       return (status_code);
+static int do_check_con_sum(size_t values_num, double *values,
+                            char **values_names) {
+  double total;
+  int total_num;
+  const char *status_str = "UNKNOWN";
+  int status_code = RET_UNKNOWN;
+
+  total = 0.0;
+  total_num = 0;
+  for (size_t i = 0; i < values_num; i++) {
+    if (isnan(values[i])) {
+      if (!nan_is_error_g)
+        continue;
+
+      printf("CRITICAL: Data source \"%s\" is NaN\n", values_names[i]);
+      return RET_CRITICAL;
+    }
+
+    total += values[i];
+    total_num++;
+  }
+
+  if (total_num == 0) {
+    printf("WARNING: No defined values found\n");
+    return RET_WARNING;
+  }
+
+  if (match_range(&range_critical_g, total) != 0) {
+    status_str = "CRITICAL";
+    status_code = RET_CRITICAL;
+  } else if (match_range(&range_warning_g, total) != 0) {
+    status_str = "WARNING";
+    status_code = RET_WARNING;
+  } else {
+    status_str = "OKAY";
+    status_code = RET_OKAY;
+  }
+
+  printf("%s: %g sum |", status_str, total);
+  for (size_t i = 0; i < values_num; i++)
+    printf(" %s=%f;;;;", values_names[i], values[i]);
+  printf("\n");
+
+  return status_code;
 } /* int do_check_con_sum */
 
-static int do_check_con_percentage (size_t values_num,
-               double *values, char **values_names)
-{
-       size_t i;
-       double sum = 0.0;
-       double percentage;
-
-       const char *status_str  = "UNKNOWN";
-       int         status_code = RET_UNKNOWN;
-
-       if ((values_num < 1) || (isnan (values[0])))
-       {
-               printf ("WARNING: The first value is not defined\n");
-               return (RET_WARNING);
-       }
-
-       for (i = 0; i < values_num; i++)
-       {
-               if (isnan (values[i]))
-               {
-                       if (!nan_is_error_g)
-                               continue;
-
-                       printf ("CRITICAL: Data source \"%s\" is NaN\n",
-                                       values_names[i]);
-                       return (RET_CRITICAL);
-               }
-
-               sum += values[i];
-       }
-
-       if (sum == 0.0)
-       {
-               printf ("WARNING: Values sum up to zero\n");
-               return (RET_WARNING);
-       }
-
-       percentage = 100.0 * values[0] / sum;
-
-       if (match_range (&range_critical_g, percentage) != 0)
-       {
-               status_str  = "CRITICAL";
-               status_code = RET_CRITICAL;
-       }
-       else if (match_range (&range_warning_g, percentage) != 0)
-       {
-               status_str  = "WARNING";
-               status_code = RET_WARNING;
-       }
-       else
-       {
-               status_str  = "OKAY";
-               status_code = RET_OKAY;
-       }
-
-       printf ("%s: %lf percent |", status_str, percentage);
-       for (i = 0; i < values_num; i++)
-               printf (" %s=%lf;;;;", values_names[i], values[i]);
-       return (status_code);
+static int do_check_con_percentage(size_t values_num, double *values,
+                                   char **values_names) {
+  double sum = 0.0;
+  double percentage;
+
+  const char *status_str = "UNKNOWN";
+  int status_code = RET_UNKNOWN;
+
+  if ((values_num < 1) || (isnan(values[0]))) {
+    printf("WARNING: The first value is not defined\n");
+    return RET_WARNING;
+  }
+
+  for (size_t i = 0; i < values_num; i++) {
+    if (isnan(values[i])) {
+      if (!nan_is_error_g)
+        continue;
+
+      printf("CRITICAL: Data source \"%s\" is NaN\n", values_names[i]);
+      return RET_CRITICAL;
+    }
+
+    sum += values[i];
+  }
+
+  if (sum == 0.0) {
+    printf("WARNING: Values sum up to zero\n");
+    return RET_WARNING;
+  }
+
+  percentage = 100.0 * values[0] / sum;
+
+  if (match_range(&range_critical_g, percentage) != 0) {
+    status_str = "CRITICAL";
+    status_code = RET_CRITICAL;
+  } else if (match_range(&range_warning_g, percentage) != 0) {
+    status_str = "WARNING";
+    status_code = RET_WARNING;
+  } else {
+    status_str = "OKAY";
+    status_code = RET_OKAY;
+  }
+
+  printf("%s: %lf percent |", status_str, percentage);
+  for (size_t i = 0; i < values_num; i++)
+    printf(" %s=%lf;;;;", values_names[i], values[i]);
+  return status_code;
 } /* int do_check_con_percentage */
 
-static int do_check (lcc_connection_t *connection)
-{
-       gauge_t *values;
-       char   **values_names;
-       size_t   values_num;
-       char ident_str[1024];
-       lcc_identifier_t ident;
-       size_t i;
-       int status;
-
-       snprintf (ident_str, sizeof (ident_str), "%s/%s",
-                       hostname_g, value_string_g);
-       ident_str[sizeof (ident_str) - 1] = 0;
-
-       memset (&ident, 0, sizeof (ident));
-       status = lcc_string_to_identifier (connection, &ident, ident_str);
-       if (status != 0)
-       {
-               printf ("ERROR: Creating an identifier failed: %s.\n",
-                               lcc_strerror (connection));
-               LCC_DESTROY (connection);
-               return (RET_CRITICAL);
-       }
-
-       status = lcc_getval (connection, &ident,
-                       &values_num, &values, &values_names);
-       if (status != 0)
-       {
-               printf ("ERROR: Retrieving values from the daemon failed: %s.\n",
-                               lcc_strerror (connection));
-               LCC_DESTROY (connection);
-               return (RET_CRITICAL);
-       }
-
-       LCC_DESTROY (connection);
-
-       status = filter_ds (&values_num, &values, &values_names);
-       if (status != RET_OKAY)
-               return (status);
-
-       status = RET_UNKNOWN;
-       if (consolitation_g == CON_NONE)
-               status =  do_check_con_none (values_num, values, values_names);
-       else if (consolitation_g == CON_AVERAGE)
-               status =  do_check_con_average (values_num, values, values_names);
-       else if (consolitation_g == CON_SUM)
-               status = do_check_con_sum (values_num, values, values_names);
-       else if (consolitation_g == CON_PERCENTAGE)
-               status = do_check_con_percentage (values_num, values, values_names);
-
-       free (values);
-       if (values_names != NULL)
-               for (i = 0; i < values_num; i++)
-                       free (values_names[i]);
-       free (values_names);
-
-       return (status);
+static int do_check(lcc_connection_t *connection) {
+  gauge_t *values;
+  char **values_names;
+  size_t values_num;
+  char ident_str[1024];
+  lcc_identifier_t ident;
+  int status;
+
+  snprintf(ident_str, sizeof(ident_str), "%s/%s", hostname_g, value_string_g);
+  ident_str[sizeof(ident_str) - 1] = 0;
+
+  status = lcc_string_to_identifier(connection, &ident, ident_str);
+  if (status != 0) {
+    printf("ERROR: Creating an identifier failed: %s.\n",
+           lcc_strerror(connection));
+    LCC_DESTROY(connection);
+    return RET_CRITICAL;
+  }
+
+  status = lcc_getval(connection, &ident, &values_num, &values, &values_names);
+  if (status != 0) {
+    printf("ERROR: Retrieving values from the daemon failed: %s.\n",
+           lcc_strerror(connection));
+    LCC_DESTROY(connection);
+    return RET_CRITICAL;
+  }
+
+  LCC_DESTROY(connection);
+
+  status = filter_ds(&values_num, &values, &values_names);
+  if (status != RET_OKAY)
+    return status;
+
+  status = RET_UNKNOWN;
+  if (consolitation_g == CON_NONE)
+    status = do_check_con_none(values_num, values, values_names);
+  else if (consolitation_g == CON_AVERAGE)
+    status = do_check_con_average(values_num, values, values_names);
+  else if (consolitation_g == CON_SUM)
+    status = do_check_con_sum(values_num, values, values_names);
+  else if (consolitation_g == CON_PERCENTAGE)
+    status = do_check_con_percentage(values_num, values, values_names);
+
+  free(values);
+  if (values_names != NULL)
+    for (size_t i = 0; i < values_num; i++)
+      free(values_names[i]);
+  free(values_names);
+
+  return status;
 } /* int do_check */
 
-int main (int argc, char **argv)
-{
-       char address[1024];
-       lcc_connection_t *connection;
-
-       int status;
-
-       range_critical_g.min = NAN;
-       range_critical_g.max = NAN;
-       range_critical_g.invert = 0;
-
-       range_warning_g.min = NAN;
-       range_warning_g.max = NAN;
-       range_warning_g.invert = 0;
-
-       while (42)
-       {
-               int c;
-
-               c = getopt (argc, argv, "w:c:s:n:H:g:d:hm");
-               if (c < 0)
-                       break;
-
-               switch (c)
-               {
-                       case 'c':
-                               parse_range (optarg, &range_critical_g);
-                               break;
-                       case 'w':
-                               parse_range (optarg, &range_warning_g);
-                               break;
-                       case 's':
-                               socket_file_g = optarg;
-                               break;
-                       case 'n':
-                               value_string_g = optarg;
-                               break;
-                       case 'H':
-                               hostname_g = optarg;
-                               break;
-                       case 'g':
-                               if (strcasecmp (optarg, "none") == 0)
-                                       consolitation_g = CON_NONE;
-                               else if (strcasecmp (optarg, "average") == 0)
-                                       consolitation_g = CON_AVERAGE;
-                               else if (strcasecmp (optarg, "sum") == 0)
-                                       consolitation_g = CON_SUM;
-                               else if (strcasecmp (optarg, "percentage") == 0)
-                                       consolitation_g = CON_PERCENTAGE;
-                               else
-                               {
-                                       fprintf (stderr, "Unknown consolidation function `%s'.\n",
-                                                       optarg);
-                                       usage (argv[0]);
-                               }
-                               break;
-                       case 'd':
-                       {
-                               char **tmp;
-                               tmp = (char **) realloc (match_ds_g,
-                                               (match_ds_num_g + 1)
-                                               * sizeof (char *));
-                               if (tmp == NULL)
-                               {
-                                       fprintf (stderr, "realloc failed: %s\n",
-                                                       strerror (errno));
-                                       return (RET_UNKNOWN);
-                               }
-                               match_ds_g = tmp;
-                               match_ds_g[match_ds_num_g] = cn_strdup (optarg);
-                               if (match_ds_g[match_ds_num_g] == NULL)
-                               {
-                                       fprintf (stderr, "cn_strdup failed: %s\n",
-                                                       strerror (errno));
-                                       return (RET_UNKNOWN);
-                               }
-                               match_ds_num_g++;
-                               break;
-                       }
-                       case 'm':
-                               nan_is_error_g = 1;
-                               break;
-                       default:
-                               usage (argv[0]);
-               } /* switch (c) */
-       }
-
-       if ((socket_file_g == NULL) || (value_string_g == NULL)
-                       || ((hostname_g == NULL) && (strcasecmp (value_string_g, "LIST"))))
-       {
-               fprintf (stderr, "Missing required arguments.\n");
-               usage (argv[0]);
-       }
-
-       snprintf (address, sizeof (address), "unix:%s", socket_file_g);
-       address[sizeof (address) - 1] = 0;
-
-       connection = NULL;
-       status = lcc_connect (address, &connection);
-       if (status != 0)
-       {
-               printf ("ERROR: Connecting to daemon at %s failed.\n",
-                               socket_file_g);
-               return (RET_CRITICAL);
-       }
-
-       if (0 == strcasecmp (value_string_g, "LIST"))
-               return (do_listval (connection));
-
-       return (do_check (connection));
+int main(int argc, char **argv) {
+  char address[1024];
+  lcc_connection_t *connection;
+
+  int status;
+
+  range_critical_g.min = NAN;
+  range_critical_g.max = NAN;
+  range_critical_g.invert = 0;
+
+  range_warning_g.min = NAN;
+  range_warning_g.max = NAN;
+  range_warning_g.invert = 0;
+
+  while (42) {
+    int c;
+
+    c = getopt(argc, argv, "w:c:s:n:H:g:d:hm");
+    if (c < 0)
+      break;
+
+    switch (c) {
+    case 'c':
+      parse_range(optarg, &range_critical_g);
+      break;
+    case 'w':
+      parse_range(optarg, &range_warning_g);
+      break;
+    case 's':
+      socket_file_g = optarg;
+      break;
+    case 'n':
+      value_string_g = optarg;
+      break;
+    case 'H':
+      hostname_g = optarg;
+      break;
+    case 'g':
+      if (strcasecmp(optarg, "none") == 0)
+        consolitation_g = CON_NONE;
+      else if (strcasecmp(optarg, "average") == 0)
+        consolitation_g = CON_AVERAGE;
+      else if (strcasecmp(optarg, "sum") == 0)
+        consolitation_g = CON_SUM;
+      else if (strcasecmp(optarg, "percentage") == 0)
+        consolitation_g = CON_PERCENTAGE;
+      else {
+        fprintf(stderr, "Unknown consolidation function `%s'.\n", optarg);
+        usage(argv[0]);
+      }
+      break;
+    case 'd': {
+      char **tmp;
+      tmp = realloc(match_ds_g, (match_ds_num_g + 1) * sizeof(char *));
+      if (tmp == NULL) {
+        fprintf(stderr, "realloc failed: %s\n", strerror(errno));
+        return RET_UNKNOWN;
+      }
+      match_ds_g = tmp;
+      match_ds_g[match_ds_num_g] = cn_strdup(optarg);
+      if (match_ds_g[match_ds_num_g] == NULL) {
+        fprintf(stderr, "cn_strdup failed: %s\n", strerror(errno));
+        return RET_UNKNOWN;
+      }
+      match_ds_num_g++;
+      break;
+    }
+    case 'm':
+      nan_is_error_g = 1;
+      break;
+    default:
+      usage(argv[0]);
+    } /* switch (c) */
+  }
+
+  if ((socket_file_g == NULL) || (value_string_g == NULL) ||
+      ((hostname_g == NULL) && (strcasecmp(value_string_g, "LIST")))) {
+    fprintf(stderr, "Missing required arguments.\n");
+    usage(argv[0]);
+  }
+
+  snprintf(address, sizeof(address), "unix:%s", socket_file_g);
+  address[sizeof(address) - 1] = 0;
+
+  connection = NULL;
+  status = lcc_connect(address, &connection);
+  if (status != 0) {
+    printf("ERROR: Connecting to daemon at %s failed.\n", socket_file_g);
+    return RET_CRITICAL;
+  }
+
+  if (0 == strcasecmp(value_string_g, "LIST"))
+    return do_listval(connection);
+
+  return do_check(connection);
 } /* int main */