src/utils_cmd_getthreshold.c

   1 /**
   2  * collectd - src/utils_cmd_getthreshold.c
   3  * Copyright (C) 2008,2009  Florian octo Forster
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *   Florian octo Forster <octo at collectd.org>
  25  **/
  26
  27 #include "collectd.h"
  28
  29 #include "common.h"
  30 #include "plugin.h"
  31
  32 #include "utils_avltree.h"
  33 #include "utils_cmd_getthreshold.h"
  34 #include "utils_parse_option.h" /* for `parse_string' */
  35 #include "utils_threshold.h"
  36
  37 #define print_to_socket(fh, ...)                                               \
  38   if (fprintf(fh, __VA_ARGS__) < 0) {                                          \
  39     char errbuf[1024];                                                         \
  40     WARNING("handle_getthreshold: failed to write to socket #%i: %s",          \
  41             fileno(fh), sstrerror(errno, errbuf, sizeof(errbuf)));             \
  42     return -1;                                                                 \
  43   }
  44
  45 int handle_getthreshold(FILE *fh, char *buffer) {
  46   char *command;
  47   char *identifier;
  48   char *identifier_copy;
  49
  50   char *host;
  51   char *plugin;
  52   char *plugin_instance;
  53   char *type;
  54   char *type_instance;
  55
  56   threshold_t threshold;
  57
  58   int status;
  59   size_t i;
  60
  61   if ((fh == NULL) || (buffer == NULL))
  62     return (-1);
  63
  64   DEBUG("utils_cmd_getthreshold: handle_getthreshold (fh = %p, buffer = %s);",
  65         (void *)fh, buffer);
  66
  67   command = NULL;
  68   status = parse_string(&buffer, &command);
  69   if (status != 0) {
  70     print_to_socket(fh, "-1 Cannot parse command.\n");
  71     return (-1);
  72   }
  73   assert(command != NULL);
  74
  75   if (strcasecmp("GETTHRESHOLD", command) != 0) {
  76     print_to_socket(fh, "-1 Unexpected command: `%s'.\n", command);
  77     return (-1);
  78   }
  79
  80   identifier = NULL;
  81   status = parse_string(&buffer, &identifier);
  82   if (status != 0) {
  83     print_to_socket(fh, "-1 Cannot parse identifier.\n");
  84     return (-1);
  85   }
  86   assert(identifier != NULL);
  87
  88   if (*buffer != 0) {
  89     print_to_socket(fh, "-1 Garbage after end of command: %s\n", buffer);
  90     return (-1);
  91   }
  92
  93   /* parse_identifier() modifies its first argument,
  94    * returning pointers into it */
  95   identifier_copy = sstrdup(identifier);
  96
  97   status = parse_identifier(identifier_copy, &host, &plugin, &plugin_instance,
  98                             &type, &type_instance,
  99                             /* default_host = */ NULL);
 100   if (status != 0) {
 101     DEBUG("handle_getthreshold: Cannot parse identifier `%s'.", identifier);
 102     print_to_socket(fh, "-1 Cannot parse identifier `%s'.\n", identifier);
 103     sfree(identifier_copy);
 104     return (-1);
 105   }
 106
 107   value_list_t vl = {.values = NULL};
 108   sstrncpy(vl.host, host, sizeof(vl.host));
 109   sstrncpy(vl.plugin, plugin, sizeof(vl.plugin));
 110   if (plugin_instance != NULL)
 111     sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
 112   sstrncpy(vl.type, type, sizeof(vl.type));
 113   if (type_instance != NULL)
 114     sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
 115   sfree(identifier_copy);
 116
 117   status = ut_search_threshold(&vl, &threshold);
 118   if (status == ENOENT) {
 119     print_to_socket(fh, "-1 No threshold found for identifier %s\n",
 120                     identifier);
 121     return (0);
 122   } else if (status != 0) {
 123     print_to_socket(fh, "-1 Error while looking up threshold: %i\n", status);
 124     return (-1);
 125   }
 126
 127   /* Lets count the number of lines we'll return. */
 128   i = 0;
 129   if (threshold.host[0] != 0)
 130     i++;
 131   if (threshold.plugin[0] != 0)
 132     i++;
 133   if (threshold.plugin_instance[0] != 0)
 134     i++;
 135   if (threshold.type[0] != 0)
 136     i++;
 137   if (threshold.type_instance[0] != 0)
 138     i++;
 139   if (threshold.data_source[0] != 0)
 140     i++;
 141   if (!isnan(threshold.warning_min))
 142     i++;
 143   if (!isnan(threshold.warning_max))
 144     i++;
 145   if (!isnan(threshold.failure_min))
 146     i++;
 147   if (!isnan(threshold.failure_max))
 148     i++;
 149   if (threshold.hysteresis > 0.0)
 150     i++;
 151   if (threshold.hits > 1)
 152     i++;
 153
 154   /* Print the response */
 155   print_to_socket(fh, "%zu Threshold found\n", i);
 156
 157   if (threshold.host[0] != 0)
 158     print_to_socket(fh, "Host: %s\n", threshold.host) if (
 159         threshold.plugin[0] !=
 160         0) print_to_socket(fh, "Plugin: %s\n",
 161                            threshold.plugin) if (threshold.plugin_instance[0] !=
 162                                                  0)
 163         print_to_socket(fh, "Plugin Instance: %s\n",
 164                         threshold.plugin_instance) if (threshold.type[0] != 0)
 165             print_to_socket(fh, "Type: %s\n", threshold.type) if (
 166                 threshold.type_instance[0] !=
 167                 0) print_to_socket(fh, "Type Instance: %s\n",
 168                                    threshold
 169                                        .type_instance) if (threshold.data_source
 170                                                                [0] != 0)
 171                 print_to_socket(
 172                     fh, "Data Source: %s\n",
 173                     threshold.data_source) if (!isnan(threshold.warning_min))
 174                     print_to_socket(
 175                         fh, "Warning Min: %g\n",
 176                         threshold
 177                             .warning_min) if (!isnan(threshold.warning_max))
 178                         print_to_socket(
 179                             fh, "Warning Max: %g\n",
 180                             threshold
 181                                 .warning_max) if (!isnan(threshold.failure_min))
 182                             print_to_socket(
 183                                 fh, "Failure Min: %g\n",
 184                                 threshold
 185                                     .failure_min) if (!isnan(threshold
 186                                                                  .failure_max))
 187                                 print_to_socket(
 188                                     fh, "Failure Max: %g\n",
 189                                     threshold.failure_max) if (threshold
 190                                                                    .hysteresis >
 191                                                                0.0)
 192                                     print_to_socket(
 193                                         fh, "Hysteresis: %g\n",
 194                                         threshold.hysteresis) if (threshold
 195                                                                       .hits > 1)
 196                                         print_to_socket(fh, "Hits: %i\n",
 197                                                         threshold.hits)
 198
 199                                             return (0);
 200 } /* int handle_getthreshold */