#include <string.h>
#include <time.h>
#include <errno.h>
+#include <assert.h>
+
+#include <fcgiapp.h>
+#include <fcgi_stdio.h>
#include "graph_list.h"
#include "common.h"
-static graph_list_t *graph_list = NULL;
+/*
+ * Defines
+ */
+#define UPDATE_INTERVAL 10
+
+#define ANY_TOKEN "/any/"
+#define ALL_TOKEN "/all/"
+
+/*
+ * Data types
+ */
+struct graph_ident_s /* {{{ */
+{
+ char *host;
+ char *plugin;
+ char *plugin_instance;
+ char *type;
+ char *type_instance;
+}; /* }}} struct graph_ident_s */
+
+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 graph_config_s /* {{{ */
+{
+ graph_ident_t select;
+
+ char *title;
+ char *vertical_label;
+
+ graph_instance_t *instances;
+
+ graph_config_t *next;
+}; /* }}} struct graph_config_s */
+
+/*
+ * Global variables
+ */
+static graph_config_t *graph_config_head = NULL;
+
+static graph_ident_t *graph_list = NULL;
static size_t graph_list_length = 0;
static time_t gl_last_update = 0;
-static int gl_add_copy (graph_list_t *gl) /* {{{ */
+/*
+ * Private functions
+ */
+/* FIXME: These "print_*" functions are used for debugging. They should be
+ * removed at some point. */
+static int print_files (const graph_instance_t *inst) /* {{{ */
+{
+ size_t i;
+
+ for (i = 0; i < inst->files_num; i++)
+ {
+ graph_ident_t *file = inst->files + i;
+
+ printf (" File \"%s/%s-%s/%s-%s\"\n",
+ file->host,
+ file->plugin, file->plugin_instance,
+ file->type, file->type_instance);
+ }
+
+ return (0);
+} /* }}} int print_instances */
+
+static int print_instances (const graph_config_t *cfg) /* {{{ */
+{
+ graph_instance_t *inst;
+
+ for (inst = cfg->instances; inst != NULL; inst = inst->next)
+ {
+ printf (" Instance \"%s/%s-%s/%s-%s\"\n",
+ inst->select.host,
+ inst->select.plugin, inst->select.plugin_instance,
+ inst->select.type, inst->select.type_instance);
+
+ print_files (inst);
+ }
+
+ return (0);
+} /* }}} int print_instances */
+
+static int print_graphs (void) /* {{{ */
+{
+ graph_config_t *cfg;
+
+ for (cfg = graph_config_head; cfg != NULL; cfg = cfg->next)
+ {
+ printf ("Graph \"%s/%s-%s/%s-%s\"\n",
+ cfg->select.host,
+ cfg->select.plugin, cfg->select.plugin_instance,
+ cfg->select.type, cfg->select.type_instance);
+
+ print_instances (cfg);
+ }
+
+ return (0);
+} /* }}} int print_graphs */
+
+/* "Safe" version of strcmp(3): Either or both pointers may be NULL. */
+static int strcmp_s (const char *s1, const char *s2) /* {{{ */
+{
+ if ((s1 == NULL) && (s2 == NULL))
+ return (0);
+ else if (s1 == NULL)
+ return (1);
+ else if (s2 == NULL)
+ return (-1);
+ assert ((s1 != NULL) && (s2 != NULL));
+
+ return (strcmp (s1, s2));
+} /* }}} int strcmp_s */
+
+static _Bool part_matches (const char *sel, const char *val) /* {{{ */
+{
+ if ((sel == NULL) && (val == NULL))
+ return (1);
+
+ if (sel == NULL) /* && (val != NULL) */
+ return (0);
+
+ if ((strcasecmp (ALL_TOKEN, sel) == 0)
+ || (strcasecmp (ANY_TOKEN, sel) == 0))
+ return (1);
+
+ if (val == NULL) /* && (sel != NULL) */
+ return (0);
+
+ if (strcmp (sel, val) == 0)
+ return (1);
+
+ return (0);
+} /* }}} _Bool part_matches */
+
+static _Bool file_matches (const graph_ident_t *sel, /* {{{ */
+ const graph_ident_t *val)
+{
+ if ((sel == NULL) && (val == NULL))
+ return (0);
+ else if (sel == NULL)
+ return (-1);
+ else if (val == NULL)
+ return (1);
+
+ if (!part_matches (sel->host, val->host))
+ return (0);
+
+ if (!part_matches (sel->plugin, val->plugin))
+ return (0);
+
+ if (!part_matches (sel->plugin_instance, val->plugin_instance))
+ return (0);
+
+ if (!part_matches (sel->type, val->type))
+ return (0);
+
+ if (!part_matches (sel->type_instance, val->type_instance))
+ return (0);
+
+ return (1);
+} /* }}} _Bool ident_compare */
+
+/*
+ * Copy part of an identifier. If the "template" value is ANY_TOKEN, "value" is
+ * copied and returned. This function is used when creating graph_instance_t
+ * from graph_config_t.
+ */
+static char *identifier_copy_part (const char *template, const char *value) /* {{{ */
+{
+ if (template == NULL)
+ {
+ return (NULL);
+ }
+ else if (strcasecmp (ANY_TOKEN, template) == 0)
+ {
+ /* ANY in the graph selection => concrete value in the instance. */
+ if (value == NULL)
+ return (NULL);
+ else
+ return (strdup (value));
+ }
+ else if (strcasecmp (ALL_TOKEN, template) == 0)
+ {
+ /* ALL in the graph selection => ALL in the instance. */
+ return (strdup (ALL_TOKEN));
+ }
+ else
+ {
+ assert (value != NULL);
+ assert (strcmp (template, value) == 0);
+ return (strdup (template));
+ }
+} /* }}} int identifier_copy_part */
+
+static graph_instance_t *instance_create (graph_config_t *cfg, /* {{{ */
+ const graph_ident_t *file)
+{
+ graph_instance_t *i;
+
+ if ((cfg == NULL) || (file == NULL))
+ return (NULL);
+
+ i = malloc (sizeof (*i));
+ if (i == NULL)
+ return (NULL);
+ memset (i, 0, sizeof (*i));
+
+ i->select.host = identifier_copy_part (cfg->select.host, file->host);
+ i->select.plugin = identifier_copy_part (cfg->select.plugin, file->plugin);
+ i->select.plugin_instance = identifier_copy_part (cfg->select.plugin_instance,
+ file->plugin_instance);
+ i->select.type = identifier_copy_part (cfg->select.type, file->type);
+ i->select.type_instance = identifier_copy_part (cfg->select.type_instance,
+ file->type_instance);
+
+ i->files = NULL;
+ i->files_num = 0;
+
+ i->next = NULL;
+
+ if (cfg->instances == NULL)
+ cfg->instances = i;
+ else
+ {
+ graph_instance_t *last;
+
+ last = cfg->instances;
+ while (last->next != NULL)
+ last = last->next;
+
+ last->next = i;
+ }
+
+ return (i);
+} /* }}} graph_instance_t *instance_create */
+
+static int instance_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;
+ tmp = inst->files + inst->files_num;
+
+ memset (tmp, 0, sizeof (*tmp));
+ tmp->host = strdup (file->host);
+ tmp->plugin = strdup (file->plugin);
+ if (file->plugin_instance != NULL)
+ tmp->plugin_instance = strdup (file->plugin_instance);
+ else
+ tmp->plugin_instance = NULL;
+ tmp->type = strdup (file->type);
+ if (file->type_instance != NULL)
+ tmp->type_instance = strdup (file->type_instance);
+ else
+ tmp->type_instance = NULL;
+
+ inst->files_num++;
+
+ return (0);
+} /* }}} int instance_add_file */
+
+static graph_instance_t *graph_find_instance (graph_config_t *cfg, /* {{{ */
+ const graph_ident_t *file)
+{
+ graph_instance_t *i;
+
+ if ((cfg == NULL) || (file == NULL))
+ return (NULL);
+
+ for (i = cfg->instances; i != NULL; i = i->next)
+ if (file_matches (&i->select, file))
+ return (i);
+
+ return (NULL);
+} /* }}} graph_instance_t *graph_find_instance */
+
+static 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 = instance_create (cfg, file);
+ if (inst == NULL)
+ return (ENOMEM);
+ }
+
+ return (instance_add_file (inst, file));
+} /* }}} int graph_add_file */
+
+static int graph_append (graph_config_t *cfg) /* {{{ */
+{
+ graph_config_t *last;
+
+ if (cfg == NULL)
+ return (EINVAL);
+
+ if (graph_config_head == NULL)
+ {
+ graph_config_head = cfg;
+ return (0);
+ }
+
+ last = graph_config_head;
+ while (last->next != NULL)
+ last = last->next;
+
+ last->next = cfg;
+
+ return (0);
+} /* }}} int graph_append */
+
+static int graph_create_from_file (const graph_ident_t *file) /* {{{ */
+{
+ graph_config_t *cfg;
+
+ cfg = malloc (sizeof (*cfg));
+ if (cfg == NULL)
+ return (ENOMEM);
+ memset (cfg, 0, sizeof (*cfg));
+
+ cfg->select.host = strdup (file->host);
+ cfg->select.plugin = strdup (file->plugin);
+ cfg->select.plugin_instance = strdup (file->plugin_instance);
+ cfg->select.type = strdup (file->type);
+ cfg->select.type_instance = strdup (file->type_instance);
+
+ cfg->title = NULL;
+ cfg->vertical_label = NULL;
+ cfg->instances = NULL;
+ cfg->next = NULL;
+
+ graph_append (cfg);
+
+ return (graph_add_file (cfg, file));
+} /* }}} int graph_create_from_file */
+
+static int register_file (const graph_ident_t *file) /* {{{ */
+{
+ graph_config_t *cfg;
+ int num_graphs = 0;
+
+ for (cfg = graph_config_head; cfg != NULL; cfg = cfg->next)
+ {
+ int status;
+
+ if (!file_matches (&cfg->select, file))
+ continue;
+
+ status = graph_add_file (cfg, file);
+ if (status != 0)
+ {
+ /* report error */;
+ }
+ else
+ {
+ num_graphs++;
+ }
+ }
+
+ if (num_graphs == 0)
+ graph_create_from_file (file);
+
+ return (0);
+} /* }}} int register_file */
+
+static int FIXME_graph_create_from_file (const graph_ident_t *file) /* {{{ */
+{
+ graph_config_t *cfg;
+
+ cfg = malloc (sizeof (*cfg));
+ if (cfg == NULL)
+ return (ENOMEM);
+ memset (cfg, 0, sizeof (*cfg));
+
+ cfg->select.host = strdup (file->host);
+ cfg->select.plugin = strdup (file->plugin);
+ cfg->select.plugin_instance = strdup (file->plugin_instance);
+ cfg->select.type = strdup (file->type);
+ cfg->select.type_instance = strdup (file->type_instance);
+
+ cfg->title = NULL;
+ cfg->vertical_label = NULL;
+ cfg->instances = NULL;
+ cfg->next = NULL;
+
+ graph_append (cfg);
+
+ return (0);
+} /* }}} int FIXME_graph_create_from_file */
+
+/* FIXME: Actually read the config file here. */
+static int read_graph_config (void) /* {{{ */
{
- graph_list_t *ptr;
+ if (graph_config_head != NULL)
+ return (0);
+
+ graph_ident_t ident;
+
+
+ ident.host = ANY_TOKEN;
+ ident.plugin = "cpu";
+ ident.plugin_instance = ANY_TOKEN;
+ ident.type = "cpu";
+ ident.type_instance = ALL_TOKEN;
+ FIXME_graph_create_from_file (&ident);
+
+ ident.plugin = "memory";
+ ident.plugin_instance = "";
+ ident.type = "memory";
+ FIXME_graph_create_from_file (&ident);
+
+ ident.plugin = "swap";
+ ident.plugin_instance = "";
+ ident.type = "swap";
+ FIXME_graph_create_from_file (&ident);
+
+ ident.plugin = ANY_TOKEN;
+ ident.plugin_instance = ANY_TOKEN;
+ ident.type = "ps_state";
+ FIXME_graph_create_from_file (&ident);
+
+ ident.host = ALL_TOKEN;
+ ident.plugin = "cpu";
+ ident.plugin_instance = ALL_TOKEN;
+ ident.type = "cpu";
+ ident.type_instance = "idle";
+ FIXME_graph_create_from_file (&ident);
+
+ return (0);
+} /* }}} int read_graph_config */
+
+
+
+static int gl_compare (const void *p0, const void *p1) /* {{{ */
+{
+ const graph_ident_t *gl0 = p0;
+ const graph_ident_t *gl1 = p1;
+ int status;
+
+ status = strcmp (gl0->host, gl1->host);
+ if (status != 0)
+ return (status);
+
+ status = strcmp (gl0->plugin, gl1->plugin);
+ if (status != 0)
+ return (status);
+
+ status = strcmp_s (gl0->plugin_instance, gl1->plugin_instance);
+ if (status != 0)
+ return (status);
+
+ status = strcmp (gl0->type, gl1->type);
+ if (status != 0)
+ return (status);
+
+ return (strcmp_s (gl0->type_instance, gl1->type_instance));
+} /* }}} int gl_compare */
+
+static void gl_clear_entry (graph_ident_t *gl) /* {{{ */
+{
+ if (gl == NULL)
+ return;
+
+ free (gl->host);
+ free (gl->plugin);
+ free (gl->plugin_instance);
+ free (gl->type);
+ free (gl->type_instance);
+
+ gl->host = NULL;
+ gl->plugin = NULL;
+ gl->plugin_instance = NULL;
+ gl->type = NULL;
+ gl->type_instance = NULL;
+} /* }}} void gl_clear_entry */
+
+static void gl_clear (void) /* {{{ */
+{
+ size_t i;
+
+ for (i = 0; i < graph_list_length; i++)
+ gl_clear_entry (graph_list + i);
+
+ free (graph_list);
+ graph_list = NULL;
+ graph_list_length = 0;
+ gl_last_update = 0;
+} /* }}} void gl_clear */
+
+static int gl_add_copy (graph_ident_t *gl) /* {{{ */
+{
+ graph_ident_t *ptr;
int status;
if (gl == NULL)
static int callback_type (const char *type, void *user_data) /* {{{ */
{
- graph_list_t *gl;
+ graph_ident_t *gl;
int status;
if ((type == NULL) || (user_data == NULL))
*gl->type_instance = 0;
gl->type_instance++;
}
+ else
+ {
+ gl->type_instance = gl->type + strlen (gl->type);
+ }
+
+ register_file (gl);
status = gl_add_copy (gl);
static int callback_plugin (const char *plugin, void *user_data) /* {{{ */
{
- graph_list_t *gl;
+ graph_ident_t *gl;
int status;
if ((plugin == NULL) || (user_data == NULL))
*gl->plugin_instance = 0;
gl->plugin_instance++;
}
+ else
+ {
+ gl->plugin_instance = gl->plugin + strlen (gl->plugin);
+ }
status = foreach_type (gl->host, plugin, callback_type, gl);
static int callback_host (const char *host, void *user_data) /* {{{ */
{
- graph_list_t *gl;
+ graph_ident_t *gl;
int status;
if ((host == NULL) || (user_data == NULL))
return (status);
} /* }}} int callback_host */
+/*
+ * Global functions
+ */
+int gl_instance_get_ident (graph_instance_t *inst, /* {{{ */
+ char *buffer, size_t buffer_size)
+{
+ if ((inst == NULL) || (buffer == NULL) || (buffer_size < 1))
+ return (EINVAL);
+
+ snprintf (buffer, buffer_size, "%s/%s-%s/%s-%s",
+ inst->select.host,
+ inst->select.plugin, inst->select.plugin_instance,
+ inst->select.type, inst->select.type_instance);
+ buffer[buffer_size - 1] = 0;
+
+ return (0);
+} /* }}} int gl_instance_get_ident */
+
+int gl_graph_get_all (gl_cfg_callback callback, /* {{{ */
+ void *user_data)
+{
+ graph_config_t *cfg;
+
+ if (callback == NULL)
+ return (EINVAL);
+
+ for (cfg = graph_config_head; cfg != NULL; cfg = cfg->next)
+ {
+ int status;
+
+ status = (*callback) (cfg, user_data);
+ if (status != 0)
+ return (status);
+ }
+
+ return (0);
+} /* }}} int gl_graph_get_all */
+
+int gl_graph_instance_get_all (graph_config_t *cfg, /* {{{ */
+ gl_inst_callback callback, void *user_data)
+{
+ graph_instance_t *inst;
+
+ if ((cfg == NULL) || (callback == NULL))
+ return (EINVAL);
+
+ for (inst = cfg->instances; inst != NULL; inst = inst->next)
+ {
+ int status;
+
+ status = (*callback) (cfg, inst, user_data);
+ if (status != 0)
+ return (status);
+ }
+
+ return (0);
+} /* }}} int gl_graph_instance_get_all */
+
+int gl_instance_get_all (gl_inst_callback callback, /* {{{ */
+ void *user_data)
+{
+ graph_config_t *cfg;
+
+ for (cfg = graph_config_head; cfg != NULL; cfg = cfg->next)
+ {
+ graph_instance_t *inst;
+
+ for (inst = cfg->instances; inst != NULL; inst = inst->next)
+ {
+ int status;
+
+ status = (*callback) (cfg, inst, user_data);
+ if (status != 0)
+ return (status);
+ }
+ }
+
+ return (0);
+} /* }}} int gl_instance_get_all */
+
int gl_update (void) /* {{{ */
{
time_t now;
- graph_list_t gl;
+ graph_ident_t gl;
int status;
+ /*
+ printf ("Content-Type: text/plain\n\n");
+ */
+
+ read_graph_config ();
+
now = time (NULL);
- if ((gl_last_update + 2) >= now)
+ if ((gl_last_update + UPDATE_INTERVAL) >= now)
return (0);
+ gl_clear ();
+
memset (&gl, 0, sizeof (gl));
gl.host = NULL;
gl.plugin = NULL;
gl.type = NULL;
gl.type_instance = NULL;
- /* TODO: Free old list */
-
status = foreach_host (callback_host, &gl);
+
+ /* print_graphs (); */
+
+ if (graph_list_length > 1)
+ qsort (graph_list, graph_list_length, sizeof (*graph_list), gl_compare);
+
return (status);
} /* }}} int gl_update */
{
int status;
- status = (*callback) (graph_list + i, user_data);
+ status = (*callback) ((void *) (graph_list + i), user_data);
if (status != 0)
return (status);
}
projects / collection4.git / blobdiff