src/utils_cmd_listval.c

   1 /**
   2  * collectd - src/utils_cmd_listval.c
   3  * Copyright (C) 2008       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_cache.h"
  33 #include "utils_cmd_listval.h"
  34 #include "utils_parse_option.h"
  35
  36 #define free_everything_and_return(status)                                     \
  37   do {                                                                         \
  38     for (size_t j = 0; j < number; j++) {                                      \
  39       sfree(names[j]);                                                         \
  40       names[j] = NULL;                                                         \
  41     }                                                                          \
  42     sfree(names);                                                              \
  43     sfree(times);                                                              \
  44     return (status);                                                           \
  45   } while (0)
  46
  47 #define print_to_socket(fh, ...)                                               \
  48   do {                                                                         \
  49     if (fprintf(fh, __VA_ARGS__) < 0) {                                        \
  50       char errbuf[1024];                                                       \
  51       WARNING("handle_listval: failed to write to socket #%i: %s", fileno(fh), \
  52               sstrerror(errno, errbuf, sizeof(errbuf)));                       \
  53       free_everything_and_return(-1);                                          \
  54     }                                                                          \
  55     fflush(fh);                                                                \
  56   } while (0)
  57
  58 int handle_listval(FILE *fh, char *buffer) {
  59   char *command;
  60   char **names = NULL;
  61   cdtime_t *times = NULL;
  62   size_t number = 0;
  63   int status;
  64
  65   DEBUG("utils_cmd_listval: handle_listval (fh = %p, buffer = %s);", (void *)fh,
  66         buffer);
  67
  68   command = NULL;
  69   status = parse_string(&buffer, &command);
  70   if (status != 0) {
  71     print_to_socket(fh, "-1 Cannot parse command.\n");
  72     free_everything_and_return(-1);
  73   }
  74   assert(command != NULL);
  75
  76   if (strcasecmp("LISTVAL", command) != 0) {
  77     print_to_socket(fh, "-1 Unexpected command: `%s'.\n", command);
  78     free_everything_and_return(-1);
  79   }
  80
  81   if (*buffer != 0) {
  82     print_to_socket(fh, "-1 Garbage after end of command: %s\n", buffer);
  83     free_everything_and_return(-1);
  84   }
  85
  86   status = uc_get_names(&names, &times, &number);
  87   if (status != 0) {
  88     DEBUG("command listval: uc_get_names failed with status %i", status);
  89     print_to_socket(fh, "-1 uc_get_names failed.\n");
  90     free_everything_and_return(-1);
  91   }
  92
  93   print_to_socket(fh, "%i Value%s found\n", (int)number,
  94                   (number == 1) ? "" : "s");
  95   for (size_t i = 0; i < number; i++)
  96     print_to_socket(fh, "%.3f %s\n", CDTIME_T_TO_DOUBLE(times[i]), names[i]);
  97
  98   free_everything_and_return(0);
  99 } /* int handle_listval */
 100
 101 /* vim: set sw=2 sts=2 ts=8 : */