From: Florian Forster <ff@octo.it>
Date: Sat, 19 Jun 2010 06:06:50 +0000 (+0200)
Subject: Merge branch 'search'
X-Git-Tag: v4.0.0~236
X-Git-Url: https://git.octo.it/?p=collection4.git;a=commitdiff_plain;h=2c85f876c1b9d5c161694cfb03cf20773b74c844

Merge branch 'search'

Conflicts:
	src/graph_def.c
	src/graph_ident.h
	src/graph_instance.h
---

2c85f876c1b9d5c161694cfb03cf20773b74c844
diff --cc src/Makefile.am
index de0cb7e,0000000..9b235ba
mode 100644,000000..100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@@ -1,25 -1,0 +1,26 @@@
 +AUTOMAKE_OPTIONS = foreign no-dependencies
 +
 +if COMPILER_IS_GCC
 +AM_CFLAGS = -Wall -Wextra
 +endif
 +AM_YFLAGS = -d
 +
 +BUILT_SOURCES = parser.h
 +
 +bin_PROGRAMS = collection.fcgi
 +
 +collection_fcgi_SOURCES = main.c \
 +			  oconfig.c oconfig.h aux_types.h scanner.l parser.y \
 +			  action_graph.c action_graph.h \
 +			  action_list_graphs.c action_list_graphs.h \
 +			  common.c common.h \
 +			  filesystem.c filesystem.h \
++			  graph_types.h \
 +			  graph.c graph.h \
 +			  graph_config.c graph_config.h \
 +			  graph_def.c graph_def.h \
 +			  graph_ident.c graph_ident.h \
 +			  graph_instance.c graph_instance.h \
 +			  graph_list.c graph_list.h \
 +			  utils_array.c utils_array.h \
 +			  utils_params.c utils_params.h
diff --cc src/action_list_graphs.c
index 395d8a1,0000000..b360c1d
mode 100644,000000..100644
--- a/src/action_list_graphs.c
+++ b/src/action_list_graphs.c
@@@ -1,126 -1,0 +1,140 @@@
 +#include <stdlib.h>
 +#include <stdio.h>
 +#include <string.h>
 +#include <errno.h>
 +
 +#include "action_list_graphs.h"
 +#include "graph.h"
++#include "graph_ident.h"
 +#include "graph_list.h"
 +#include "utils_params.h"
 +
 +#include <fcgiapp.h>
 +#include <fcgi_stdio.h>
 +
 +static int print_graph_inst_json (__attribute__((unused)) graph_config_t *cfg, /* {{{ */
 +    graph_instance_t *inst,
 +    void *user_data)
 +{
 +  _Bool *first;
 +  graph_ident_t *ident;
 +  char *json;
 +
 +  first = user_data;
 +
 +  ident = inst_get_selector (inst);
 +  if (ident == NULL)
 +    return (-1);
 +
 +  json = ident_to_json (ident);
 +  if (json == NULL)
 +  {
 +    ident_destroy (ident);
 +    return (ENOMEM);
 +  }
 +
 +  if (*first)
 +    printf ("%s", json);
 +  else
 +    printf (",\n%s", json);
 +
 +  *first = 0;
 +
 +  ident_destroy (ident);
 +  return (0);
 +} /* }}} int print_graph_inst_json */
 +
 +static int print_graph_json (graph_config_t *cfg, /* {{{ */
 +    void *user_data)
 +{
 +  return (gl_graph_instance_get_all (cfg, print_graph_inst_json, user_data));
 +} /* }}} int print_graph_json */
 +
 +static int list_graphs_json (void) /* {{{ */
 +{
 +  _Bool first = 1;
 +
 +  printf ("Content-Type: application/json\n\n");
 +
 +  printf ("[\n");
 +  gl_graph_get_all (print_graph_json, /* user_data = */ &first);
 +  printf ("\n]");
 +
 +  return (0);
 +} /* }}} int list_graphs_json */
 +
++struct callback_data_s
++{
++  graph_config_t *cfg;
++};
++typedef struct callback_data_s callback_data_t;
++
 +static int print_graph_inst_html (graph_config_t *cfg, /* {{{ */
 +    graph_instance_t *inst,
-     __attribute__((unused)) void *user_data)
++    void *user_data)
 +{
++  callback_data_t *data = user_data;
 +  char params[1024];
 +  char desc[1024];
 +
++  if (data->cfg != cfg)
++  {
++    if (data->cfg != NULL)
++      printf ("  </ul></li>\n");
++
++    memset (desc, 0, sizeof (desc));
++    graph_get_title (cfg, desc, sizeof (desc));
++
++    printf ("  <li>%s\n  <ul>\n", desc);
++
++    data->cfg = cfg;
++  }
++
 +  memset (params, 0, sizeof (params));
 +  inst_get_params (cfg, inst, params, sizeof (params));
 +
 +  memset (desc, 0, sizeof (desc));
 +  inst_describe (cfg, inst, desc, sizeof (desc));
 +
 +  printf ("    <li><a href=\"%s?action=graph;%s\">%s</a></li>\n",
 +      script_name (), params, desc);
 +
 +  return (0);
 +} /* }}} int print_graph_inst_html */
 +
- static int print_graph_html (graph_config_t *cfg, /* {{{ */
-     __attribute__((unused)) void *user_data)
- {
-   char buffer[1024];
- 
-   memset (buffer, 0, sizeof (buffer));
-   graph_get_title (cfg, buffer, sizeof (buffer));
- 
-   printf ("  <li>%s\n  <ul>\n", buffer);
-   gl_graph_instance_get_all (cfg, print_graph_inst_html, /* user_data = */ NULL);
-   printf ("  </ul></li>\n");
- 
-   return (0);
- } /* }}} int print_graph_html */
- 
- static int list_graphs_html (void) /* {{{ */
++static int list_graphs_html (const char *term) /* {{{ */
 +{
++  callback_data_t data = { NULL };
 +  printf ("Content-Type: text/html\n\n");
 +
 +  printf ("<ul>\n");
-   gl_graph_get_all (print_graph_html, /* user_data = */ NULL);
++  if (term == NULL)
++    gl_instance_get_all (print_graph_inst_html, /* user_data = */ &data);
++  else
++    gl_search (term, print_graph_inst_html, /* user_data = */ &data);
++
++  if (data.cfg != NULL)
++    printf ("  </ul></li>\n");
++
 +  printf ("</ul>\n");
 +
 +  return (0);
 +} /* }}} int list_graphs_html */
 +
 +int action_list_graphs (void) /* {{{ */
 +{
 +  const char *format;
 +
 +  gl_update ();
 +
 +  format = param ("format");
 +  if (format == NULL)
 +    format = "html";
 +
 +  if (strcmp ("json", format) == 0)
 +    return (list_graphs_json ());
 +  else
-     return (list_graphs_html ());
++    return (list_graphs_html (param ("search")));
 +} /* }}} int action_list_graphs */
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph.c
index 154af77,0000000..2809ebb
mode 100644,000000..100644
--- a/src/graph.c
+++ b/src/graph.c
@@@ -1,290 -1,0 +1,350 @@@
 +#include <stdlib.h>
 +#include <stdio.h>
 +#include <stdint.h>
 +#include <inttypes.h>
 +#include <string.h>
 +#include <time.h>
 +#include <errno.h>
 +#include <assert.h>
 +
 +#include "graph.h"
 +#include "graph_list.h"
 +#include "graph_ident.h"
 +#include "graph_def.h"
 +#include "graph_config.h"
 +#include "common.h"
 +#include "filesystem.h"
 +#include "utils_params.h"
 +
 +#include <fcgiapp.h>
 +#include <fcgi_stdio.h>
 +
 +/*
 + * Data types
 + */
 +struct graph_config_s /* {{{ */
 +{
 +  graph_ident_t *select;
 +
 +  char *title;
 +  char *vertical_label;
++  _Bool show_zero;
 +
 +  graph_def_t *defs;
 +
 +  graph_instance_t *instances;
 +}; /* }}} struct graph_config_s */
 +
 +/*
 + * Private functions
 + */
 +static graph_instance_t *graph_find_instance (graph_config_t *cfg, /* {{{ */
 +    const graph_ident_t *ident)
 +{
 +  if ((cfg == NULL) || (ident == NULL))
 +    return (NULL);
 +
 +  return (inst_find_matching (cfg->instances, ident));
 +} /* }}} graph_instance_t *graph_find_instance */
 +
 +/*
 + * Config functions
 + */
 +static graph_ident_t *graph_config_get_selector (const oconfig_item_t *ci) /* {{{ */
 +{
 +  char *host = NULL;
 +  char *plugin = NULL;
 +  char *plugin_instance = NULL;
 +  char *type = NULL;
 +  char *type_instance = NULL;
 +  graph_ident_t *ret;
 +  int i;
 +
 +  for (i = 0; i < ci->children_num; i++)
 +  {
 +    oconfig_item_t *child;
 +
 +    child = ci->children + i;
 +
 +    if (strcasecmp ("Host", child->key) == 0)
 +      graph_config_get_string (child, &host);
 +    else if (strcasecmp ("Plugin", child->key) == 0)
 +      graph_config_get_string (child, &plugin);
 +    else if (strcasecmp ("PluginInstance", child->key) == 0)
 +      graph_config_get_string (child, &plugin_instance);
 +    else if (strcasecmp ("Type", child->key) == 0)
 +      graph_config_get_string (child, &type);
 +    else if (strcasecmp ("TypeInstance", child->key) == 0)
 +      graph_config_get_string (child, &type_instance);
 +    /* else: ignore all other directives here. */
 +  } /* for */
 +
 +  ret = ident_create (host, plugin, plugin_instance, type, type_instance);
 +
 +  free (host);
 +  free (plugin);
 +  free (plugin_instance);
 +  free (type);
 +  free (type_instance);
 +
 +  return (ret);
 +} /* }}} int graph_config_get_selector */
 +
 +/*
 + * Global functions
 + */
 +graph_config_t *graph_create (const graph_ident_t *selector) /* {{{ */
 +{
 +  graph_config_t *cfg;
 +
 +  cfg = malloc (sizeof (*cfg));
 +  if (cfg == NULL)
 +    return (NULL);
 +  memset (cfg, 0, sizeof (*cfg));
 +
 +  if (selector != NULL)
 +    cfg->select = ident_clone (selector);
 +  else
 +    cfg->select = NULL;
 +
 +  cfg->title = NULL;
 +  cfg->vertical_label = NULL;
 +  cfg->defs = NULL;
 +  cfg->instances = NULL;
 +
 +  return (cfg);
 +} /* }}} int graph_create */
 +
 +void graph_destroy (graph_config_t *cfg) /* {{{ */
 +{
 +  if (cfg == NULL)
 +    return;
 +
 +  ident_destroy (cfg->select);
 +
 +  free (cfg->title);
 +  free (cfg->vertical_label);
 +
 +  def_destroy (cfg->defs);
 +  inst_destroy (cfg->instances);
 +} /* }}} void graph_destroy */
 +
 +int graph_config_add (const oconfig_item_t *ci) /* {{{ */
 +{
 +  graph_ident_t *select;
 +  graph_config_t *cfg = NULL;
 +  int i;
 +
 +  select = graph_config_get_selector (ci);
 +  if (select == NULL)
 +    return (EINVAL);
 +
 +  cfg = graph_create (/* selector = */ NULL);
 +  if (cfg == NULL)
 +    return (ENOMEM);
 +
 +  cfg->select = select;
 +
 +  for (i = 0; i < ci->children_num; i++)
 +  {
 +    oconfig_item_t *child;
 +
 +    child = ci->children + i;
 +
 +    if (strcasecmp ("Title", child->key) == 0)
 +      graph_config_get_string (child, &cfg->title);
 +    else if (strcasecmp ("VerticalLabel", child->key) == 0)
 +      graph_config_get_string (child, &cfg->vertical_label);
++    else if (strcasecmp ("ShowZero", child->key) == 0)
++      graph_config_get_bool (child, &cfg->show_zero);
 +    else if (strcasecmp ("DEF", child->key) == 0)
 +      def_config (cfg, child);
 +  } /* for */
 +
 +  gl_add_graph (cfg);
 +
 +  return (0);
 +} /* }}} graph_config_add */
 +
 +int graph_add_file (graph_config_t *cfg, const graph_ident_t *file) /* {{{ */
 +{
 +  graph_instance_t *inst;
 +
 +  inst = graph_find_instance (cfg, file);
 +  if (inst == NULL)
 +  {
 +    inst = inst_create (cfg, file);
 +    if (inst == NULL)
 +      return (ENOMEM);
 +
 +    if (cfg->instances == NULL)
 +      cfg->instances = inst;
 +    else
 +      inst_append (cfg->instances, inst);
 +  }
 +
 +  return (inst_add_file (inst, file));
 +} /* }}} int graph_add_file */
 +
 +int graph_get_title (graph_config_t *cfg, /* {{{ */
 +    char *buffer, size_t buffer_size)
 +{
 +  if ((cfg == NULL) || (buffer == NULL) || (buffer_size < 1))
 +    return (EINVAL);
 +
 +  if (cfg->title == NULL)
 +    cfg->title = ident_to_string (cfg->select);
 +
 +  if (cfg->title == NULL)
 +    return (ENOMEM);
 +
 +  strncpy (buffer, cfg->title, buffer_size);
 +  buffer[buffer_size - 1] = 0;
 +
 +  return (0);
 +} /* }}} int graph_get_title */
 +
 +graph_ident_t *graph_get_selector (graph_config_t *cfg) /* {{{ */
 +{
 +  if (cfg == NULL)
 +    return (NULL);
 +
 +  return (ident_clone (cfg->select));
 +} /* }}} graph_ident_t *graph_get_selector */
 +
 +graph_instance_t *graph_get_instances (graph_config_t *cfg) /* {{{ */
 +{
 +  if (cfg == NULL)
 +    return (NULL);
 +
 +  return (cfg->instances);
 +} /* }}} graph_instance_t *graph_get_instances */
 +
 +graph_def_t *graph_get_defs (graph_config_t *cfg) /* {{{ */
 +{
 +  if (cfg == NULL)
 +    return (NULL);
 +
 +  return (cfg->defs);
 +} /* }}} graph_def_t *graph_get_defs */
 +
 +int graph_add_def (graph_config_t *cfg, graph_def_t *def) /* {{{ */
 +{
 +  if ((cfg == NULL) || (def == NULL))
 +    return (EINVAL);
 +
 +  if (cfg->defs == NULL)
 +  {
 +    cfg->defs = def;
 +    return (0);
 +  }
 +
 +  return (def_append (cfg->defs, def));
 +} /* }}} int graph_add_def */
 +
 +_Bool graph_matches (graph_config_t *cfg, const graph_ident_t *ident) /* {{{ */
 +{
 +  if ((cfg == NULL) || (ident == NULL))
 +    return (0);
 +
 +  return (ident_matches (cfg->select, ident));
 +} /* }}} _Bool graph_matches */
 +
++struct graph_search_data_s
++{
++  graph_config_t *cfg;
++  graph_inst_callback_t callback;
++  void *user_data;
++};
++typedef struct graph_search_data_s graph_search_data_t;
++
++static int graph_search_submit (graph_instance_t *inst, /* {{{ */
++    void *user_data)
++{
++  graph_search_data_t *data = user_data;
++
++  if ((inst == NULL) || (data == NULL))
++    return (EINVAL);
++
++  return ((*data->callback) (data->cfg, inst, data->user_data));
++} /* }}} int graph_search_submit */
++
++int graph_search (graph_config_t *cfg, const char *term, /* {{{ */
++    graph_inst_callback_t callback,
++    void *user_data)
++{
++  graph_search_data_t data = { cfg, callback, user_data };
++  char buffer[1024];
++  int status;
++
++  status = graph_get_title (cfg, buffer, sizeof (buffer));
++  if (status != 0)
++  {
++    fprintf (stderr, "graph_search: graph_get_title failed\n");
++    return (status);
++  }
++
++  if (strstr (buffer, term) != NULL)
++  {
++    status = inst_foreach (cfg->instances, graph_search_submit, &data);
++    if (status != 0)
++      return (status);
++  }
++  else
++  {
++    status = inst_search (cfg, cfg->instances, term,
++        graph_search_submit, &data);
++    if (status != 0)
++      return (status);
++  }
++
++  return (0);
++} /* }}} int graph_search */
++
 +int graph_compare (graph_config_t *cfg, const graph_ident_t *ident) /* {{{ */
 +{
 +  if ((cfg == NULL) || (ident == NULL))
 +    return (0);
 +
 +  return (ident_compare (cfg->select, ident));
 +} /* }}} int graph_compare */
 +
 +int graph_clear_instances (graph_config_t *cfg) /* {{{ */
 +{
 +  if (cfg == NULL)
 +    return (EINVAL);
 +
 +  inst_destroy (cfg->instances);
 +  cfg->instances = NULL;
 +
 +  return (0);
 +} /* }}} int graph_clear_instances */
 +
 +int graph_get_rrdargs (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
 +    str_array_t *args)
 +{
 +  if ((cfg == NULL) || (inst == NULL) || (args == NULL))
 +    return (EINVAL);
 +
 +  if (cfg->title != NULL)
 +  {
 +    array_append (args, "-t");
 +    array_append (args, cfg->title);
 +  }
 +
 +  if (cfg->vertical_label != NULL)
 +  {
 +    array_append (args, "-v");
 +    array_append (args, cfg->vertical_label);
 +  }
 +
++  if (cfg->show_zero)
++  {
++    array_append (args, "-l");
++    array_append (args, "0");
++  }
++
 +  return (0);
 +} /* }}} int graph_get_rrdargs */
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph.h
index 6e9ae07,0000000..57a866f
mode 100644,000000..100644
--- a/src/graph.h
+++ b/src/graph.h
@@@ -1,48 -1,0 +1,43 @@@
 +#ifndef GRAPH_H
 +#define GRAPH_H 1
 +
- /*
-  * Data types
-  */
- struct graph_config_s;
- typedef struct graph_config_s graph_config_t;
- 
- #include "graph_def.h"
- #include "graph_ident.h"
- #include "graph_instance.h"
++#include "graph_types.h"
 +#include "oconfig.h"
 +#include "utils_array.h"
 +
 +/*
 + * Functions
 + */
 +graph_config_t *graph_create (const graph_ident_t *selector);
 +
 +void graph_destroy (graph_config_t *graph);
 +
 +int graph_config_add (const oconfig_item_t *ci);
 +
 +int graph_add_file (graph_config_t *cfg, const graph_ident_t *file);
 +
 +int graph_get_title (graph_config_t *cfg,
 +    char *buffer, size_t buffer_size);
 +
 +graph_ident_t *graph_get_selector (graph_config_t *cfg);
 +
 +graph_instance_t *graph_get_instances (graph_config_t *cfg);
 +
 +graph_def_t *graph_get_defs (graph_config_t *cfg);
 +
 +int graph_add_def (graph_config_t *cfg, graph_def_t *def);
 +
 +_Bool graph_matches (graph_config_t *cfg, const graph_ident_t *ident);
 +
++int graph_search (graph_config_t *cfg, const char *term,
++    graph_inst_callback_t callback, void *user_data);
++
 +int graph_compare (graph_config_t *cfg, const graph_ident_t *ident);
 +
 +int graph_clear_instances (graph_config_t *cfg);
 +
 +int graph_get_rrdargs (graph_config_t *cfg, graph_instance_t *inst,
 +    str_array_t *args);
 +
 +#endif /* GRAPH_H */
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph_def.c
index 927b3fe,0000000..cecc8f0
mode 100644,000000..100644
--- a/src/graph_def.c
+++ b/src/graph_def.c
@@@ -1,345 -1,0 +1,346 @@@
 +#include <stdlib.h>
 +#include <string.h>
 +#include <errno.h>
 +
 +#include "graph_def.h"
 +#include "graph.h"
 +#include "graph_config.h"
++#include "graph_ident.h"
 +#include "common.h"
 +#include "oconfig.h"
 +
 +#include <fcgiapp.h>
 +#include <fcgi_stdio.h>
 +
 +/*
 + * Data structures
 + */
 +struct graph_def_s
 +{
 +  graph_ident_t *select;
 +
 +  char *ds_name;
 +  char *legend;
 +  uint32_t color;
 +  _Bool stack;
 +  _Bool area;
 +  char *format;
 +
 +  graph_def_t *next;
 +};
 +
 +/*
 + * Private functions
 + */
 +#define DEF_CONFIG_FIELD(field) \
 +static int def_config_##field (const oconfig_item_t *ci, graph_ident_t *ident) \
 +{                                                                              \
 +  char *tmp = NULL;                                                            \
 +  int status = graph_config_get_string (ci, &tmp);                             \
 +  if (status != 0)                                                             \
 +    return (status);                                                           \
 +  ident_set_##field (ident, tmp);                                              \
 +  free (tmp);                                                                  \
 +  return (0);                                                                  \
 +} /* }}} int def_config_field */
 +
 +DEF_CONFIG_FIELD (host);
 +DEF_CONFIG_FIELD (plugin);
 +DEF_CONFIG_FIELD (plugin_instance);
 +DEF_CONFIG_FIELD (type);
 +DEF_CONFIG_FIELD (type_instance);
 +
 +#undef DEF_CONFIG_FIELD
 +
 +static int def_config_color (const oconfig_item_t *ci, uint32_t *ret_color) /* {{{ */
 +{
 +  char *tmp;
 +  char *endptr;
 +  uint32_t color;
 +
 +  if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
 +    return (EINVAL);
 +
 +  tmp = ci->values[0].value.string;
 +
 +  endptr = NULL;
 +  errno = 0;
 +  color = (uint32_t) strtoul (tmp, &endptr, /* base = */ 16);
 +  if ((errno != 0) || (endptr == tmp) || (color > 0x00ffffff))
 +    return (EINVAL);
 +
 +  *ret_color = color;
 +
 +  return (0);
 +} /* }}} int def_config_color */
 +
 +static graph_def_t *def_config_get_obj (graph_config_t *cfg, /* {{{ */
 +    const oconfig_item_t *ci)
 +{
 +  graph_ident_t *ident;
 +  char *ds_name = NULL;
 +  graph_def_t *def;
 +  int i;
 +
 +  ident = graph_get_selector (cfg);
 +  if (ident == NULL)
 +  {
 +    fprintf (stderr, "def_config_get_obj: graph_get_selector failed");
 +    return (NULL);
 +  }
 +
 +  for (i = 0; i < ci->children_num; i++)
 +  {
 +    oconfig_item_t *child;
 +
 +#define HANDLE_FIELD(name,field) \
 +    else if (strcasecmp (name, child->key) == 0) \
 +      def_config_##field (child, ident)
 +
 +    child = ci->children + i;
 +    if (strcasecmp ("DSName", child->key) == 0)
 +      graph_config_get_string (child, &ds_name);
 +
 +    HANDLE_FIELD ("Host", host);
 +    HANDLE_FIELD ("Plugin", plugin);
 +    HANDLE_FIELD ("PluginInstance", plugin_instance);
 +    HANDLE_FIELD ("Type", type);
 +    HANDLE_FIELD ("TypeInstance", type_instance);
 +
 +#undef HANDLE_FIELD
 +  }
 +
 +  def = def_create (cfg, ident, ds_name);
 +  if (def == NULL)
 +  {
 +    fprintf (stderr, "def_config_get_obj: def_create failed\n");
 +    ident_destroy (ident);
 +    free (ds_name);
 +    return (NULL);
 +  }
 +
 +  ident_destroy (ident);
 +  free (ds_name);
 +
 +  return (def);
 +} /* }}} graph_def_t *def_config_get_obj */
 +
 +/*
 + * Public functions
 + */
 +graph_def_t *def_create (graph_config_t *cfg, graph_ident_t *ident, /* {{{ */
 +    const char *ds_name)
 +{
 +  graph_ident_t *selector;
 +  graph_def_t *ret;
 +
 +  if ((cfg == NULL) || (ident == NULL) || (ds_name == NULL))
 +    return (NULL);
 +
 +  selector = graph_get_selector (cfg);
 +  if (selector == NULL)
 +    return (NULL);
 +
 +  ret = malloc (sizeof (*ret));
 +  if (ret == NULL)
 +  {
 +    ident_destroy (selector);
 +    return (NULL);
 +  }
 +  memset (ret, 0, sizeof (*ret));
 +  ret->legend = NULL;
 +  ret->format = NULL;
 +
 +  ret->ds_name = strdup (ds_name);
 +  if (ret->ds_name == NULL)
 +  {
 +    ident_destroy (selector);
 +    free (ret);
 +    return (NULL);
 +  }
 +
 +  ret->color = get_random_color ();
 +  ret->next = NULL;
 +
 +  ret->select = ident_copy_with_selector (selector, ident,
 +      IDENT_FLAG_REPLACE_ALL);
 +  if (ret->select == NULL)
 +  {
 +    ident_destroy (selector);
 +    free (ret->ds_name);
 +    free (ret);
 +    return (NULL);
 +  }
 +
 +  ident_destroy (selector);
 +  return (ret);
 +} /* }}} graph_def_t *def_create */
 +
 +void def_destroy (graph_def_t *def) /* {{{ */
 +{
 +  graph_def_t *next;
 +
 +  if (def == NULL)
 +    return;
 +
 +  next = def->next;
 +
 +  ident_destroy (def->select);
 +
 +  free (def->ds_name);
 +  free (def->legend);
 +  free (def->format);
 +
 +  free (def);
 +
 +  def_destroy (next);
 +} /* }}} void def_destroy */
 +
 +int def_config (graph_config_t *cfg, const oconfig_item_t *ci) /* {{{ */
 +{
 +  graph_def_t *def;
 +  int i;
 +
 +  def = def_config_get_obj (cfg, ci);
 +  if (def == NULL)
 +    return (EINVAL);
 +
 +  for (i = 0; i < ci->children_num; i++)
 +  {
 +    oconfig_item_t *child;
 +
 +    child = ci->children + i;
 +    if (strcasecmp ("Legend", child->key) == 0)
 +      graph_config_get_string (child, &def->legend);
 +    else if (strcasecmp ("Color", child->key) == 0)
 +      def_config_color (child, &def->color);
 +    else if (strcasecmp ("Stack", child->key) == 0)
 +      graph_config_get_bool (child, &def->stack);
 +    else if (strcasecmp ("Area", child->key) == 0)
 +      graph_config_get_bool (child, &def->area);
 +    else if (strcasecmp ("Format", child->key) == 0)
 +      graph_config_get_string (child, &def->format);
 +  }
 +
 +  return (graph_add_def (cfg, def));
 +} /* }}} int def_config */
 +
 +int def_append (graph_def_t *head, graph_def_t *def) /* {{{ */
 +{
 +  graph_def_t *ptr;
 +
 +  if ((head == NULL) || (def == NULL))
 +    return (EINVAL);
 +
 +  ptr = head;
 +  while (ptr->next != NULL)
 +    ptr = ptr->next;
 +
 +  ptr->next = def;
 +
 +  return (0);
 +} /* }}} int def_append */
 +
 +graph_def_t *def_search (graph_def_t *head, graph_ident_t *ident, /* {{{ */
 +    const char *ds_name)
 +{
 +  graph_def_t *ptr;
 +
 +  if ((head == NULL) || (ident == NULL) || (ds_name == NULL))
 +    return (NULL);
 +
 +  for (ptr = head; ptr != NULL; ptr = ptr->next)
 +  {
 +    if (!ident_matches (ptr->select, ident))
 +      continue;
 +
 +    if (strcmp (ptr->ds_name, ds_name) == 0)
 +      return (ptr);
 +  }
 +
 +  return (NULL);
 +} /* }}} graph_def_t *def_search */
 +
 +_Bool def_matches (graph_def_t *def, graph_ident_t *ident) /* {{{ */
 +{
 +  return (ident_matches (def->select, ident));
 +} /* }}} _Bool def_matches */
 +
 +int def_foreach (graph_def_t *def, def_callback_t callback, /* {{{ */
 +    void *user_data)
 +{
 +  graph_def_t *ptr;
 +
 +  if ((def == NULL) || (callback == NULL))
 +    return (EINVAL);
 +
 +  for (ptr = def; ptr != NULL; ptr = ptr->next)
 +  {
 +    int status;
 +
 +    status = (*callback) (ptr, user_data);
 +    if (status != 0)
 +      return (status);
 +  }
 +
 +  return (0);
 +} /* }}} int def_foreach */
 +
 +int def_get_rrdargs (graph_def_t *def, graph_ident_t *ident, /* {{{ */
 +    str_array_t *args)
 +{
 +  char *file;
 +  int index;
 +
 +  if ((def == NULL) || (ident == NULL) || (args == NULL))
 +    return (EINVAL);
 +
 +  file = ident_to_file (ident);
 +  if (file == NULL)
 +  {
 +    DEBUG ("gl_ident_get_rrdargs: ident_to_file returned NULL.\n");
 +    return (-1);
 +  }
 +
 +  DEBUG ("gl_ident_get_rrdargs: file = %s;\n", file);
 +
 +  index = array_argc (args);
 +
 +  /* CDEFs */
 +  array_append_format (args, "DEF:def_%04i_min=%s:%s:MIN",
 +      index, file, def->ds_name);
 +  array_append_format (args, "DEF:def_%04i_avg=%s:%s:AVERAGE",
 +      index, file, def->ds_name);
 +  array_append_format (args, "DEF:def_%04i_max=%s:%s:MAX",
 +      index, file, def->ds_name);
 +  /* VDEFs */
 +  array_append_format (args, "VDEF:vdef_%04i_min=def_%04i_min,MINIMUM",
 +      index, index);
 +  array_append_format (args, "VDEF:vdef_%04i_avg=def_%04i_avg,AVERAGE",
 +      index, index);
 +  array_append_format (args, "VDEF:vdef_%04i_max=def_%04i_max,MAXIMUM",
 +      index, index);
 +  array_append_format (args, "VDEF:vdef_%04i_lst=def_%04i_avg,LAST",
 +      index, index);
 +
 +  /* Graph part */
 +  array_append_format (args, "%s:def_%04i_avg#%06"PRIx32":%s%s",
 +      def->area ? "AREA" : "LINE1",
 +      index, def->color,
 +      (def->legend != NULL) ? def->legend : def->ds_name,
 +      def->stack ? ":STACK" : "");
 +  array_append_format (args, "GPRINT:vdef_%04i_min:%s min,",
-       index, (def->format != NULL) ? def->format : "%lg");
++      index, (def->format != NULL) ? def->format : "%6.2lf");
 +  array_append_format (args, "GPRINT:vdef_%04i_avg:%s avg,",
-       index, (def->format != NULL) ? def->format : "%lg");
++      index, (def->format != NULL) ? def->format : "%6.2lf");
 +  array_append_format (args, "GPRINT:vdef_%04i_max:%s max,",
-       index, (def->format != NULL) ? def->format : "%lg");
++      index, (def->format != NULL) ? def->format : "%6.2lf");
 +  array_append_format (args, "GPRINT:vdef_%04i_lst:%s last\\l",
-       index, (def->format != NULL) ? def->format : "%lg");
++      index, (def->format != NULL) ? def->format : "%6.2lf");
 +
 +  free (file);
 +
 +  return (0);
 +} /* }}} int def_get_rrdargs */
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph_def.h
index b2cd228,0000000..a4bb7fd
mode 100644,000000..100644
--- a/src/graph_def.h
+++ b/src/graph_def.h
@@@ -1,35 -1,0 +1,28 @@@
 +#ifndef GRAPH_DEF_H
 +#define GRAPH_DEF_H 1
 +
- struct graph_def_s;
- typedef struct graph_def_s graph_def_t;
- 
- typedef int (*def_callback_t) (graph_def_t *def,
-     void *user_data);
- 
- #include "graph.h"
- #include "graph_ident.h"
++#include "graph_types.h"
 +#include "utils_array.h"
 +#include "oconfig.h"
 +
 +graph_def_t *def_create (graph_config_t *cfg, graph_ident_t *ident,
 +    const char *ds_name);
 +
 +void def_destroy (graph_def_t *def);
 +
 +int def_config (graph_config_t *cfg, const oconfig_item_t *ci);
 +
 +int def_append (graph_def_t *head, graph_def_t *def);
 +
 +graph_def_t *def_search (graph_def_t *head, graph_ident_t *ident,
 +    const char *ds_name);
 +
 +_Bool def_matches (graph_def_t *def, graph_ident_t *ident);
 +
 +int def_foreach (graph_def_t *def, def_callback_t callback, void *user_data);
 +
 +int def_get_rrdargs (graph_def_t *def, graph_ident_t *ident,
 +    str_array_t *args);
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
 +#endif
diff --cc src/graph_ident.h
index af86c9d,0000000..e2f2ba6
mode 100644,000000..100644
--- a/src/graph_ident.h
+++ b/src/graph_ident.h
@@@ -1,54 -1,0 +1,52 @@@
 +#ifndef GRAPH_IDENT_H
 +#define GRAPH_IDENT_H 1
 +
 +#include <time.h>
++#include "graph_types.h"
 +
 +#define ANY_TOKEN "/any/"
 +#define ALL_TOKEN "/all/"
 +
 +#define IS_ANY(str) (((str) != NULL) && (strcasecmp (ANY_TOKEN, (str)) == 0))
 +#define IS_ALL(str) (((str) != NULL) && (strcasecmp (ALL_TOKEN, (str)) == 0))
 +
- struct graph_ident_s;
- typedef struct graph_ident_s graph_ident_t;
- 
 +graph_ident_t *ident_create (const char *host,
 +    const char *plugin, const char *plugin_instance,
 +    const char *type, const char *type_instance);
 +graph_ident_t *ident_clone (const graph_ident_t *ident);
 +
 +#define IDENT_FLAG_REPLACE_ALL 0x01
 +#define IDENT_FLAG_REPLACE_ANY 0x02
 +graph_ident_t *ident_copy_with_selector (const graph_ident_t *selector,
 +    const graph_ident_t *ident, unsigned int flags);
 +
 +void ident_destroy (graph_ident_t *ident);
 +
 +const char *ident_get_host (graph_ident_t *ident);
 +const char *ident_get_plugin (graph_ident_t *ident);
 +const char *ident_get_plugin_instance (graph_ident_t *ident);
 +const char *ident_get_type (graph_ident_t *ident);
 +const char *ident_get_type_instance (graph_ident_t *ident);
 +
 +int ident_set_host (graph_ident_t *ident, const char *host);
 +int ident_set_plugin (graph_ident_t *ident, const char *plugin);
 +int ident_set_plugin_instance (graph_ident_t *ident,
 +    const char *plugin_instance);
 +int ident_set_type (graph_ident_t *ident, const char *type);
 +int ident_set_type_instance (graph_ident_t *ident,
 +    const char *type_instance);
 +
 +int ident_compare (const graph_ident_t *i0,
 +    const graph_ident_t *i1);
 +
 +_Bool ident_matches (const graph_ident_t *selector,
- 		const graph_ident_t *ident);
++    const graph_ident_t *ident);
 +
 +char *ident_to_string (const graph_ident_t *ident);
 +char *ident_to_file (const graph_ident_t *ident);
 +char *ident_to_json (const graph_ident_t *ident);
 +
 +time_t ident_get_mtime (const graph_ident_t *ident);
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
 +#endif /* GRAPH_IDENT_H */
diff --cc src/graph_instance.c
index bad0bcd,0000000..90d1753
mode 100644,000000..100644
--- a/src/graph_instance.c
+++ b/src/graph_instance.c
@@@ -1,497 -1,0 +1,530 @@@
 +#include <stdlib.h>
 +#include <string.h>
 +#include <errno.h>
 +#include <time.h>
 +
 +#include "graph_instance.h"
++#include "graph_def.h"
 +#include "graph_ident.h"
 +#include "graph_list.h"
 +#include "common.h"
 +#include "utils_params.h"
 +
 +#include <fcgiapp.h>
 +#include <fcgi_stdio.h>
 +
 +struct graph_instance_s /* {{{ */
 +{
 +  graph_ident_t *select;
 +
 +  graph_ident_t **files;
 +  size_t files_num;
 +
 +  graph_instance_t *next;
 +}; /* }}} struct graph_instance_s */
 +
 +struct def_callback_data_s
 +{
 +  graph_instance_t *inst;
 +  str_array_t *args;
 +};
 +typedef struct def_callback_data_s def_callback_data_t;
 +
 +/*
 + * Private functions
 + */
 +/* Create one DEF for each data source in the file. Called by
 + * "inst_get_default_defs" for each file. */
 +static graph_def_t *ident_get_default_defs (graph_config_t *cfg, /* {{{ */
 +    graph_ident_t *ident, graph_def_t *def_head)
 +{
 +  graph_def_t *defs = NULL;
 +  char *file;
 +  char **dses = NULL;
 +  size_t dses_num = 0;
 +  int status;
 +  size_t i;
 +
 +  if ((cfg == NULL) || (ident == NULL))
 +    return (def_head);
 +
 +  file = ident_to_file (ident);
 +  if (file == NULL)
 +  {
 +    fprintf (stderr, "ident_get_default_defs: ident_to_file failed\n");
 +    return (def_head);
 +  }
 +
 +  status = ds_list_from_rrd_file (file, &dses_num, &dses);
 +  if (status != 0)
 +  {
 +    free (file);
 +    return (def_head);
 +  }
 +
 +  for (i = 0; i < dses_num; i++)
 +  {
 +    graph_def_t *def;
 +
 +    def = def_search (def_head, ident, dses[i]);
 +    if (def != NULL)
 +      continue;
 +
 +    def = def_create (cfg, ident, dses[i]);
 +    if (def == NULL)
 +      continue;
 +
 +    if (defs == NULL)
 +      defs = def;
 +    else
 +      def_append (defs, def);
 +
 +    free (dses[i]);
 +  }
 +
 +  free (dses);
 +  free (file);
 +
 +  return (defs);
 +} /* }}} int ident_get_default_defs */
 +
 +/* Create one or more DEFs for each file in the graph instance. The number
 + * depends on the number of data sources in each of the files. Called from
 + * "inst_get_rrdargs" if no DEFs are available from the configuration.
 + * */
 +static graph_def_t *inst_get_default_defs (graph_config_t *cfg, /* {{{ */
 +    graph_instance_t *inst)
 +{
 +  graph_def_t *defs = NULL;
 +  size_t i;
 +
 +  if ((cfg == NULL) || (inst == NULL))
 +    return (NULL);
 +
 +  for (i = 0; i < inst->files_num; i++)
 +  {
 +    graph_def_t *def;
 +
 +    def = ident_get_default_defs (cfg, inst->files[i], defs);
 +    if (def == NULL)
 +      continue;
 +
 +    if (defs == NULL)
 +      defs = def;
 +    else
 +      def_append (defs, def);
 +  }
 +
 +  return (defs);
 +} /* }}} graph_def_t *inst_get_default_defs */
 +
 +/* Called with each DEF in turn. Calls "def_get_rrdargs" with every appropriate
 + * file / DEF pair. */
 +static int gl_instance_get_rrdargs_cb (graph_def_t *def, void *user_data) /* {{{ */
 +{
 +  def_callback_data_t *data = user_data;
 +  graph_instance_t *inst = data->inst;
 +  str_array_t *args = data->args;
 +
 +  size_t i;
 +
 +  for (i = 0; i < inst->files_num; i++)
 +  {
 +    if (!def_matches (def, inst->files[i]))
 +      continue;
 +
 +    def_get_rrdargs (def, inst->files[i], args);
 +  }
 +
 +  return (0);
 +} /* }}} int gl_instance_get_rrdargs_cb */
 +
 +static const char *get_part_from_param (const char *prim_key, /* {{{ */
 +    const char *sec_key)
 +{
 +  const char *val;
 +
 +  val = param (prim_key);
 +  if (val != NULL)
 +    return (val);
 +  
 +  return (param (sec_key));
 +} /* }}} const char *get_part_from_param */
 +
 +/*
 + * Public functions
 + */
 +graph_instance_t *inst_create (graph_config_t *cfg, /* {{{ */
 +    const graph_ident_t *ident)
 +{
 +  graph_instance_t *i;
 +  graph_ident_t *selector;
 +
 +  if ((cfg == NULL) || (ident == NULL))
 +    return (NULL);
 +
 +  i = malloc (sizeof (*i));
 +  if (i == NULL)
 +    return (NULL);
 +  memset (i, 0, sizeof (*i));
 +
 +  selector = graph_get_selector (cfg);
 +  if (selector == NULL)
 +  {
 +    fprintf (stderr, "inst_create: graph_get_selector failed\n");
 +    free (i);
 +    return (NULL);
 +  }
 +
 +  i->select = ident_copy_with_selector (selector, ident,
 +      IDENT_FLAG_REPLACE_ANY);
 +  if (i->select == NULL)
 +  {
 +    fprintf (stderr, "inst_create: ident_copy_with_selector failed\n");
 +    ident_destroy (selector);
 +    free (i);
 +    return (NULL);
 +  }
 +
 +  ident_destroy (selector);
 +
 +  i->files = NULL;
 +  i->files_num = 0;
 +
 +  i->next = NULL;
 +
 +  return (i);
 +} /* }}} graph_instance_t *inst_create */
 +
 +void inst_destroy (graph_instance_t *inst) /* {{{ */
 +{
 +  graph_instance_t *next;
 +  size_t i;
 +
 +  if (inst == NULL)
 +    return;
 +
 +  next = inst->next;
 +
 +  ident_destroy (inst->select);
 +
 +  for (i = 0; i < inst->files_num; i++)
 +    ident_destroy (inst->files[i]);
 +  free (inst->files);
 +
 +  free (inst);
 +
 +  inst_destroy (next);
 +} /* }}} void inst_destroy */
 +
 +int inst_add_file (graph_instance_t *inst, /* {{{ */
 +    const graph_ident_t *file)
 +{
 +  graph_ident_t **tmp;
 +
 +  tmp = realloc (inst->files, sizeof (*inst->files) * (inst->files_num + 1));
 +  if (tmp == NULL)
 +    return (ENOMEM);
 +  inst->files = tmp;
 +
 +  inst->files[inst->files_num] = ident_clone (file);
 +  if (inst->files[inst->files_num] == NULL)
 +    return (ENOMEM);
 +
 +  inst->files_num++;
 +
 +  return (0);
 +} /* }}} int inst_add_file */
 +
 +graph_instance_t *inst_get_selected (graph_config_t *cfg) /* {{{ */
 +{
 +  const char *host = get_part_from_param ("inst_host", "host");
 +  const char *plugin = get_part_from_param ("inst_plugin", "plugin");
 +  const char *plugin_instance = get_part_from_param ("inst_plugin_instance", "plugin_instance");
 +  const char *type = get_part_from_param ("inst_type", "type");
 +  const char *type_instance = get_part_from_param ("inst_type_instance", "type_instance");
 +  graph_ident_t *ident;
 +  graph_instance_t *inst;
 +
 +  if (cfg == NULL)
 +    cfg = gl_graph_get_selected ();
 +
 +  if (cfg == NULL)
 +  {
 +    DEBUG ("inst_get_selected: cfg == NULL;\n");
 +    return (NULL);
 +  }
 +
 +  if ((host == NULL)
 +      || (plugin == NULL) || (plugin_instance == NULL)
 +      || (type == NULL) || (type_instance == NULL))
 +  {
 +    DEBUG ("inst_get_selected: A parameter is NULL.\n");
 +    return (NULL);
 +  }
 +
 +  ident = ident_create (host, plugin, plugin_instance, type, type_instance);
 +
 +  for (inst = graph_get_instances (cfg); inst != NULL; inst = inst->next)
 +  {
 +    if (ident_compare (ident, inst->select) != 0)
 +      continue;
 +
 +    ident_destroy (ident);
 +    return (inst);
 +  }
 +
 +  DEBUG ("inst_get_selected: No match found.\n");
 +  ident_destroy (ident);
 +  return (NULL);
 +} /* }}} graph_instance_t *inst_get_selected */
 +
 +int inst_get_rrdargs (graph_config_t *cfg, /* {{{ */
 +    graph_instance_t *inst,
 +    str_array_t *args)
 +{
 +  def_callback_data_t data = { inst, args };
 +  graph_def_t *defs;
 +  int status;
 +
 +  if ((cfg == NULL) || (inst == NULL) || (args == NULL))
 +    return (EINVAL);
 +
 +  status = graph_get_rrdargs (cfg, inst, args);
 +  if (status != 0)
 +    return (status);
 +
 +  defs = graph_get_defs (cfg);
 +  if (defs == NULL)
 +  {
 +    defs = inst_get_default_defs (cfg, inst);
 +
 +    if (defs == NULL)
 +      return (-1);
 +
 +    status = def_foreach (defs, gl_instance_get_rrdargs_cb, &data);
 +
 +    def_destroy (defs);
 +  }
 +  else
 +  {
 +    status = def_foreach (defs, gl_instance_get_rrdargs_cb, &data);
 +  }
 +
 +  return (status);
 +} /* }}} int inst_get_rrdargs */
 +
 +graph_ident_t *inst_get_selector (graph_instance_t *inst) /* {{{ */
 +{
 +  if (inst == NULL)
 +    return (NULL);
 +
 +  return (ident_clone (inst->select));
 +} /* }}} graph_ident_t *inst_get_selector */
 +
 +int inst_get_params (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
 +    char *buffer, size_t buffer_size)
 +{
 +  graph_ident_t *cfg_select;
 +
 +  if ((cfg == NULL) || (inst == NULL)
 +      || (buffer == NULL) || (buffer_size < 1))
 +    return (EINVAL);
 +
 +  cfg_select = graph_get_selector (cfg);
 +  if (cfg_select == NULL)
 +  {
 +    fprintf (stderr, "inst_get_params: graph_get_selector failed");
 +    return (-1);
 +  }
 +
 +  buffer[0] = 0;
 +
 +#define COPY_FIELD(field) do {                                  \
 +  const char *cfg_f  = ident_get_##field (cfg_select);          \
 +  const char *inst_f = ident_get_##field (inst->select);        \
 +  if (strcmp (cfg_f, inst_f) == 0)                              \
 +  {                                                             \
 +    strlcat (buffer, #field, buffer_size);                      \
 +    strlcat (buffer, "=", buffer_size);                         \
 +    strlcat (buffer, cfg_f, buffer_size);                       \
 +  }                                                             \
 +  else                                                          \
 +  {                                                             \
 +    strlcat (buffer, "graph_", buffer_size);                    \
 +    strlcat (buffer, #field, buffer_size);                      \
 +    strlcat (buffer, "=", buffer_size);                         \
 +    strlcat (buffer, cfg_f, buffer_size);                       \
 +    strlcat (buffer, ";", buffer_size);                         \
 +    strlcat (buffer, "inst_", buffer_size);                     \
 +    strlcat (buffer, #field, buffer_size);                      \
 +    strlcat (buffer, "=", buffer_size);                         \
 +    strlcat (buffer, inst_f, buffer_size);                      \
 +  }                                                             \
 +} while (0)
 +
 +  COPY_FIELD(host);
 +  strlcat (buffer, ";", buffer_size);
 +  COPY_FIELD(plugin);
 +  strlcat (buffer, ";", buffer_size);
 +  COPY_FIELD(plugin_instance);
 +  strlcat (buffer, ";", buffer_size);
 +  COPY_FIELD(type);
 +  strlcat (buffer, ";", buffer_size);
 +  COPY_FIELD(type_instance);
 +
 +#undef COPY_FIELD
 +
 +  ident_destroy (cfg_select);
 +
 +  return (0);
 +} /* }}} int inst_get_params */
 +
 +int inst_append (graph_instance_t *head, graph_instance_t *inst) /* {{{ */
 +{
 +  graph_instance_t *ptr;
 +
 +  if ((head == NULL) || (inst == NULL))
 +    return (EINVAL);
 +
 +  ptr = head;
 +  while (ptr->next != NULL)
 +    ptr = ptr->next;
 +
 +  ptr->next = inst;
 +
 +  return (0);
 +} /* }}} int inst_append */
 +
 +int inst_foreach (graph_instance_t *inst, /* {{{ */
 +		inst_callback_t cb, void *user_data)
 +{
 +  graph_instance_t *ptr;
 +
 +  if ((inst == NULL) || (cb == NULL))
 +    return (EINVAL);
 +
 +  for (ptr = inst; ptr != NULL; ptr = ptr->next)
 +  {
 +    int status;
 +
 +    status = (*cb) (ptr, user_data);
 +    if (status != 0)
 +      return (status);
 +  }
 +
 +  return (0);
 +} /* }}} int inst_foreach */
 +
++int inst_search (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
++    const char *term, inst_callback_t cb, void *user_data)
++{
++  graph_instance_t *ptr;
++  char buffer[1024];
++  int status;
++
++  if ((inst == NULL) || (cb == NULL))
++    return (EINVAL);
++
++  for (ptr = inst; ptr != NULL; ptr = ptr->next)
++  {
++    status = inst_describe (cfg, ptr, buffer, sizeof (buffer));
++    if (status != 0)
++    {
++      fprintf (stderr, "inst_search: inst_describe failed\n");
++      return (status);
++    }
++
++    /* no match */
++    if (strstr (buffer, term) == NULL)
++      continue;
++
++    /* match */
++    status = (*cb) (ptr, user_data);
++    if (status != 0)
++      return (status);
++  }
++
++  return (0);
++} /* }}} int inst_search */
++
 +graph_instance_t *inst_find_matching (graph_instance_t *inst, /* {{{ */
 +    const graph_ident_t *ident)
 +{
 +  graph_instance_t *ptr;
 +
 +  if ((inst == NULL) || (ident == NULL))
 +    return (NULL);
 +
 +  for (ptr = inst; ptr != NULL; ptr = ptr->next)
 +    if (ident_matches (ptr->select, ident))
 +      return (ptr);
 +
 +  return (NULL);
 +} /* }}} graph_instance_t *inst_find_matching */
 +
 +int inst_describe (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
 +    char *buffer, size_t buffer_size)
 +{
 +  graph_ident_t *cfg_select;
 +
 +  if ((cfg == NULL) || (inst == NULL)
 +      || (buffer == NULL) || (buffer_size < 2))
 +    return (EINVAL);
 +
 +  cfg_select = graph_get_selector (cfg);
 +  if (cfg_select == NULL)
 +  {
 +    fprintf (stderr, "inst_describe: graph_get_selector failed\n");
 +    return (-1);
 +  }
 +
 +  buffer[0] = 0;
 +
 +#define CHECK_FIELD(field) do {                                              \
 +  if (IS_ANY (ident_get_##field (cfg_select)))                               \
 +  {                                                                          \
 +    if (buffer[0] != 0)                                                      \
 +      strlcat (buffer, "/", buffer_size);                                    \
 +    strlcat (buffer, ident_get_##field (inst->select), buffer_size);         \
 +  }                                                                          \
 +} while (0)
 +
 +  CHECK_FIELD (host);
 +  CHECK_FIELD (plugin);
 +  CHECK_FIELD (plugin_instance);
 +  CHECK_FIELD (type);
 +  CHECK_FIELD (type_instance);
 +
 +#undef CHECK_FIELD
 +
 +  if (buffer[0] == 0)
 +    strlcat (buffer, "default", buffer_size);
 +
 +  ident_destroy (cfg_select);
 +
 +  return (0);
 +} /* }}} int inst_describe */
 +
 +time_t inst_get_mtime (graph_instance_t *inst) /* {{{ */
 +{
 +  size_t i;
 +  time_t mtime;
 +
 +  if (inst == NULL)
 +    return (0);
 +
 +  mtime = 0;
 +  for (i = 0; i < inst->files_num; i++)
 +  {
 +    time_t tmp;
 +
 +    tmp = ident_get_mtime (inst->files[i]);
 +    if (mtime < tmp)
 +      mtime = tmp;
 +  }
 +
 +  return (mtime);
 +} /* }}} time_t inst_get_mtime */
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph_instance.h
index 72ab66a,0000000..f1a4486
mode 100644,000000..100644
--- a/src/graph_instance.h
+++ b/src/graph_instance.h
@@@ -1,54 -1,0 +1,47 @@@
 +#ifndef GRAPH_INSTANCE_H
 +#define GRAPH_INSTANCE_H 1
 +
- /*
-  * Data types
-  */
- struct graph_instance_s;
- typedef struct graph_instance_s graph_instance_t;
- 
- typedef int (*inst_callback_t) (graph_instance_t *inst, void *user_data);
- 
 +#include <time.h>
 +
- #include "graph.h"
++#include "graph_types.h"
 +#include "utils_array.h"
 +
 +/*
-  * Callback types
-  */
- /*
 + * Methods
 + */
 +graph_instance_t *inst_create (graph_config_t *cfg,
 +		const graph_ident_t *ident);
 +
 +void inst_destroy (graph_instance_t *inst);
 +
 +int inst_add_file (graph_instance_t *inst, const graph_ident_t *file);
 +
 +graph_instance_t *inst_get_selected (graph_config_t *cfg);
 +
 +int inst_get_params (graph_config_t *cfg, graph_instance_t *inst,
 +    char *buffer, size_t buffer_size);
 +
 +int inst_get_rrdargs (graph_config_t *cfg, graph_instance_t *inst,
 +    str_array_t *args);
 +
 +graph_ident_t *inst_get_selector (graph_instance_t *inst);
 +
 +int inst_append (graph_instance_t *head, graph_instance_t *inst);
 +
 +int inst_foreach (graph_instance_t *inst,
 +		inst_callback_t cb, void *user_data);
 +
++int inst_search (graph_config_t *cfg, graph_instance_t *inst,
++    const char *term, inst_callback_t cb,
++    void *user_data);
++
 +graph_instance_t *inst_find_matching (graph_instance_t *inst,
 +    const graph_ident_t *ident);
 +
 +int inst_describe (graph_config_t *cfg, graph_instance_t *inst,
 +    char *buffer, size_t buffer_size);
 +
 +time_t inst_get_mtime (graph_instance_t *inst);
 +
 +#endif /* GRAPH_INSTANCE_H */
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph_list.c
index 965fcba,0000000..3c8d375
mode 100644,000000..100644
--- a/src/graph_list.c
+++ b/src/graph_list.c
@@@ -1,287 -1,0 +1,306 @@@
 +#include <stdlib.h>
 +#include <stdio.h>
 +#include <stdint.h>
 +#include <inttypes.h>
 +#include <string.h>
 +#include <time.h>
 +#include <errno.h>
 +
 +#include "graph_list.h"
 +#include "graph_ident.h"
 +#include "graph_def.h"
 +#include "graph_config.h"
 +#include "common.h"
 +#include "filesystem.h"
 +#include "utils_params.h"
 +
 +#include <fcgiapp.h>
 +#include <fcgi_stdio.h>
 +
 +/*
 + * Defines
 + */
 +#define UPDATE_INTERVAL 10
 +
 +/*
 + * Global variables
 + */
 +static graph_config_t **gl_active = NULL;
 +static size_t gl_active_num = 0;
 +
 +static graph_config_t **gl_staging = NULL;
 +static size_t gl_staging_num = 0;
 +
 +static time_t gl_last_update = 0;
 +
 +/*
 + * Private functions
 + */
 +int gl_add_graph_internal (graph_config_t *cfg, /* {{{ */
 +    graph_config_t ***gl_array, size_t *gl_array_num)
 +{
 +  graph_config_t **tmp;
 +
 +#define ARRAY_PTR  (*gl_array)
 +#define ARRAY_SIZE (*gl_array_num)
 +
 +  if (cfg == NULL)
 +    return (EINVAL);
 +
 +  tmp = realloc (ARRAY_PTR, sizeof (*ARRAY_PTR) * (ARRAY_SIZE + 1));
 +  if (tmp == NULL)
 +    return (ENOMEM);
 +  ARRAY_PTR = tmp;
 +
 +  ARRAY_PTR[ARRAY_SIZE] = cfg;
 +  ARRAY_SIZE++;
 +
 +#undef ARRAY_SIZE
 +#undef ARRAY_PTR
 +
 +  return (0);
 +} /* }}} int gl_add_graph_internal */
 +
 +static int gl_register_file (const graph_ident_t *file, /* {{{ */
 +    __attribute__((unused)) void *user_data)
 +{
 +  graph_config_t *cfg;
 +  int num_graphs = 0;
 +  size_t i;
 +
 +  for (i = 0; i < gl_active_num; i++)
 +  {
 +    graph_config_t *cfg = gl_active[i];
 +    int status;
 +
 +    if (!graph_matches (cfg, file))
 +      continue;
 +
 +    status = graph_add_file (cfg, file);
 +    if (status != 0)
 +    {
 +      /* report error */;
 +    }
 +    else
 +    {
 +      num_graphs++;
 +    }
 +  }
 +
 +  if (num_graphs == 0)
 +  {
 +    cfg = graph_create (file);
 +    gl_add_graph_internal (cfg, &gl_active, &gl_active_num);
 +    graph_add_file (cfg, file);
 +  }
 +
 +  return (0);
 +} /* }}} int gl_register_file */
 +
 +static const char *get_part_from_param (const char *prim_key, /* {{{ */
 +    const char *sec_key)
 +{
 +  const char *val;
 +
 +  val = param (prim_key);
 +  if (val != NULL)
 +    return (val);
 +  
 +  return (param (sec_key));
 +} /* }}} const char *get_part_from_param */
 +
 +static int gl_clear_instances (void) /* {{{ */
 +{
 +  size_t i;
 +
 +  for (i = 0; i < gl_active_num; i++)
 +    graph_clear_instances (gl_active[i]);
 +
 +  return (0);
 +} /* }}} int gl_clear_instances */
 +
 +
 +/*
 + * Global functions
 + */
 +int gl_add_graph (graph_config_t *cfg) /* {{{ */
 +{
 +  return (gl_add_graph_internal (cfg, &gl_staging, &gl_staging_num));
 +} /* }}} int gl_add_graph */
 +
 +int gl_config_submit (void) /* {{{ */
 +{
 +  graph_config_t **old;
 +  size_t old_num;
 +  size_t i;
 +
 +  old = gl_active;
 +  old_num = gl_active_num;
 +
 +  gl_active = gl_staging;
 +  gl_active_num = gl_staging_num;
 +
 +  gl_staging = NULL;
 +  gl_staging_num = 0;
 +
 +  for (i = 0; i < old_num; i++)
 +  {
 +    graph_destroy (old[i]);
 +    old[i] = NULL;
 +  }
 +  free (old);
 +
 +  return (0);
 +} /* }}} int graph_config_submit */
 +
- int gl_graph_get_all (gl_cfg_callback callback, /* {{{ */
++int gl_graph_get_all (graph_callback_t callback, /* {{{ */
 +    void *user_data)
 +{
 +  size_t i;
 +
 +  if (callback == NULL)
 +    return (EINVAL);
 +
 +  gl_update ();
 +
 +  for (i = 0; i < gl_active_num; i++)
 +  {
 +    int status;
 +
 +    status = (*callback) (gl_active[i], user_data);
 +    if (status != 0)
 +      return (status);
 +  }
 +
 +  return (0);
 +} /* }}} int gl_graph_get_all */
 +
 +graph_config_t *gl_graph_get_selected (void) /* {{{ */
 +{
 +  const char *host = get_part_from_param ("graph_host", "host");
 +  const char *plugin = get_part_from_param ("graph_plugin", "plugin");
 +  const char *plugin_instance = get_part_from_param ("graph_plugin_instance", "plugin_instance");
 +  const char *type = get_part_from_param ("graph_type", "type");
 +  const char *type_instance = get_part_from_param ("graph_type_instance", "type_instance");
 +  graph_ident_t *ident;
 +  size_t i;
 +
 +  if ((host == NULL)
 +      || (plugin == NULL) || (plugin_instance == NULL)
 +      || (type == NULL) || (type_instance == NULL))
 +    return (NULL);
 +
 +  ident = ident_create (host, plugin, plugin_instance, type, type_instance);
 +
 +  gl_update ();
 +
 +  for (i = 0; i < gl_active_num; i++)
 +  {
 +    if (graph_compare (gl_active[i], ident) != 0)
 +      continue;
 +
 +    ident_destroy (ident);
 +    return (gl_active[i]);
 +  }
 +
 +  ident_destroy (ident);
 +  return (NULL);
 +} /* }}} graph_config_t *gl_graph_get_selected */
 +
 +/* gl_instance_get_all, gl_graph_instance_get_all {{{ */
 +struct gl_inst_callback_data /* {{{ */
 +{
 +  graph_config_t *cfg;
-   gl_inst_callback callback;
++  graph_inst_callback_t callback;
 +  void *user_data;
 +}; /* }}} struct gl_inst_callback_data */
 +
 +static int gl_inst_callback_handler (graph_instance_t *inst, /* {{{ */
 +    void *user_data)
 +{
 +  struct gl_inst_callback_data *data = user_data;
 +
 +  return ((*data->callback) (data->cfg, inst, data->user_data));
 +} /* }}} int gl_inst_callback_handler */
 +
 +int gl_graph_instance_get_all (graph_config_t *cfg, /* {{{ */
-     gl_inst_callback callback, void *user_data)
++    graph_inst_callback_t callback, void *user_data)
 +{
 +  struct gl_inst_callback_data data =
 +  {
 +    cfg,
 +    callback,
 +    user_data
 +  };
 +
 +  if ((cfg == NULL) || (callback == NULL))
 +    return (EINVAL);
 +
 +  return (inst_foreach (graph_get_instances (cfg),
 +        gl_inst_callback_handler, &data));
 +} /* }}} int gl_graph_instance_get_all */
 +
- int gl_instance_get_all (gl_inst_callback callback, /* {{{ */
++int gl_instance_get_all (graph_inst_callback_t callback, /* {{{ */
 +    void *user_data)
 +{
 +  size_t i;
 +
 +  gl_update ();
 +
 +  for (i = 0; i < gl_active_num; i++)
 +  {
 +    int status;
 +
 +    status = gl_graph_instance_get_all (gl_active[i], callback, user_data);
 +    if (status != 0)
 +      return (status);
 +  }
 +
 +  return (0);
 +} /* }}} int gl_instance_get_all */
 +/* }}} gl_instance_get_all, gl_graph_instance_get_all */
 +
++int gl_search (const char *term, graph_inst_callback_t callback, /* {{{ */
++    void *user_data)
++{
++  size_t i;
++
++  for (i = 0; i < gl_active_num; i++)
++  {
++    int status;
++
++    status = graph_search (gl_active[i], term,
++        /* callback  = */ callback,
++        /* user data = */ user_data);
++    if (status != 0)
++      return (status);
++  }
++
++  return (0);
++} /* }}} int gl_search */
++
 +int gl_update (void) /* {{{ */
 +{
 +  time_t now;
 +  int status;
 +
 +  /*
 +  printf ("Content-Type: text/plain\n\n");
 +  */
 +
 +  now = time (NULL);
 +
 +  if ((gl_last_update + UPDATE_INTERVAL) >= now)
 +    return (0);
 +
 +  graph_read_config ();
 +
 +  gl_clear_instances ();
 +  status = fs_scan (/* callback = */ gl_register_file, /* user data = */ NULL);
 +
 +  gl_last_update = now;
 +
 +  return (status);
 +} /* }}} int gl_update */
 +
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph_list.h
index c17d6fc,0000000..e6b6888
mode 100644,000000..100644
--- a/src/graph_list.h
+++ b/src/graph_list.h
@@@ -1,36 -1,0 +1,30 @@@
 +#ifndef GRAPH_LIST_H
 +#define GRAPH_LIST_H 1
 +
++#include "graph_types.h"
++#include "graph.h"
 +#include "graph_instance.h"
 +
 +/*
-  * Callback types
-  */
- typedef int (*gl_cfg_callback) (graph_config_t *cfg,
-     void *user_data);
- 
- typedef int (*gl_inst_callback) (graph_config_t *cfg,
-     graph_instance_t *inst, void *user_data);
- 
- /*
 + * Functions
 + */
 +int gl_add_graph (graph_config_t *cfg);
 +
 +int gl_config_submit (void);
 +
- int gl_graph_get_all (gl_cfg_callback callback,
-     void *user_data);
- 
 +graph_config_t *gl_graph_get_selected (void);
 +
- int gl_graph_instance_get_all (graph_config_t *cfg,
-     gl_inst_callback callback, void *user_data);
++int gl_graph_get_all (graph_callback_t callback, void *user_data);
++
++int gl_graph_instance_get_all (graph_config_t *cfg, graph_inst_callback_t callback,
++    void *user_data);
++
++int gl_instance_get_all (graph_inst_callback_t callback, void *user_data);
 +
- int gl_instance_get_all (gl_inst_callback callback,
++int gl_search (const char *search, graph_inst_callback_t callback,
 +    void *user_data);
 +
 +int gl_update (void);
 +
 +#endif /* GRAPH_LIST_H */
 +/* vim: set sw=2 sts=2 et fdm=marker : */
diff --cc src/graph_types.h
index 0000000,0000000..623e671
new file mode 100644
--- /dev/null
+++ b/src/graph_types.h
@@@ -1,0 -1,0 +1,35 @@@
++#ifndef GRAPH_TYPES_H
++#define GRAPH_TYPES_H 1
++
++/*
++ * Opaque types
++ */
++struct graph_config_s;
++typedef struct graph_config_s graph_config_t;
++
++struct graph_def_s;
++typedef struct graph_def_s graph_def_t;
++
++struct graph_ident_s;
++typedef struct graph_ident_s graph_ident_t;
++
++struct graph_instance_s;
++typedef struct graph_instance_s graph_instance_t;
++
++/*
++ * Callback types
++ */
++typedef int (*graph_callback_t) (graph_config_t *cfg,
++    void *user_data);
++
++typedef int (*graph_inst_callback_t) (graph_config_t *cfg,
++    graph_instance_t *inst, void *user_data);
++
++typedef int (*def_callback_t) (graph_def_t *def,
++    void *user_data);
++
++typedef int (*inst_callback_t) (graph_instance_t *inst,
++		void *user_data);
++
++#endif /* GRAPH_TYPES_H */
++/* vim: set sw=2 sts=2 et fdm=marker : */