#include <stdio.h>
#include <string.h>
#include <errno.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <dirent.h> /* for PATH_MAX */
+#include <assert.h>
+#include <math.h>
-#include <fcgiapp.h>
-#include <fcgi_stdio.h>
+#include <rrd.h>
+#include "common.h"
#include "action_graph.h"
#include "graph_list.h"
#include "utils_params.h"
+#include "utils_array.h"
+
+#include <fcgiapp.h>
+#include <fcgi_stdio.h>
+
+struct data_source_s
+{
+ char *file;
+ char *name;
+ char *legend;
+ double scale;
+ _Bool nan_to_zero;
+ _Bool draw_area;
+ uint32_t color;
+};
+typedef struct data_source_s data_source_t;
+
+struct graph_def_s
+{
+ data_source_t *data_sources;
+ size_t data_sources_num;
+
+ _Bool stack;
+
+ int def_num;
+};
+typedef struct graph_def_s graph_def_t;
+
+static void graph_def_free (graph_def_t *gd) /* {{{ */
+{
+ size_t i;
+
+ if (gd == NULL)
+ return;
+
+ for (i = 0; i < gd->data_sources_num; i++)
+ {
+ free (gd->data_sources[i].file);
+ free (gd->data_sources[i].name);
+ free (gd->data_sources[i].legend);
+ }
+ free (gd->data_sources);
+ free (gd);
+} /* }}} void graph_def_free */
+
+static int hsv_to_rgb (double *hsv, double *rgb) /* {{{ */
+{
+ double c = hsv[2] * hsv[1];
+ double h = hsv[0] / 60.0;
+ double x = c * (1.0 - fabs (fmod (h, 2.0) - 1));
+ double m = hsv[2] - c;
+
+ rgb[0] = 0.0;
+ rgb[1] = 0.0;
+ rgb[2] = 0.0;
+
+ if ((0.0 <= h) && (h < 1.0)) { rgb[0] = 1.0; rgb[1] = x; rgb[2] = 0.0; }
+ else if ((1.0 <= h) && (h < 2.0)) { rgb[0] = x; rgb[1] = 1.0; rgb[2] = 0.0; }
+ else if ((2.0 <= h) && (h < 3.0)) { rgb[0] = 0.0; rgb[1] = 1.0; rgb[2] = x; }
+ else if ((3.0 <= h) && (h < 4.0)) { rgb[0] = 0.0; rgb[1] = x; rgb[2] = 1.0; }
+ else if ((4.0 <= h) && (h < 5.0)) { rgb[0] = x; rgb[1] = 0.0; rgb[2] = 1.0; }
+ else if ((5.0 <= h) && (h < 6.0)) { rgb[0] = 1.0; rgb[1] = 0.0; rgb[2] = x; }
+
+ rgb[0] += m;
+ rgb[1] += m;
+ rgb[2] += m;
+
+ return (0);
+} /* }}} int hsv_to_rgb */
+
+static uint32_t rgb_to_uint32 (double *rgb) /* {{{ */
+{
+ uint8_t r;
+ uint8_t g;
+ uint8_t b;
+
+ r = (uint8_t) (255.0 * rgb[0]);
+ g = (uint8_t) (255.0 * rgb[1]);
+ b = (uint8_t) (255.0 * rgb[2]);
+
+ return ((((uint32_t) r) << 16)
+ | (((uint32_t) g) << 8)
+ | ((uint32_t) b));
+} /* }}} uint32_t rgb_to_uint32 */
+
+static uint32_t get_random_color (void) /* {{{ */
+{
+ double hsv[3] = { 0.0, 1.0, 1.0 };
+ double rgb[3] = { 0.0, 0.0, 0.0 };
+
+ hsv[0] = 360.0 * ((double) rand ()) / (((double) RAND_MAX) + 1.0);
+
+ hsv_to_rgb (hsv, rgb);
+
+ return (rgb_to_uint32 (rgb));
+} /* }}} uint32_t get_random_color */
+
+static int graph_def_add_ds (graph_def_t *gd, /* {{{ */
+ const char *file,
+ const char *in_ds_name, size_t ds_name_len)
+{
+ char ds_name[ds_name_len + 1];
+ data_source_t *ds;
+
+ strncpy (ds_name, in_ds_name, sizeof (ds_name));
+ ds_name[sizeof (ds_name) - 1] = 0;
+
+ ds = realloc (gd->data_sources, sizeof (*ds) * (gd->data_sources_num + 1));
+ if (ds == NULL)
+ return (ENOMEM);
+ gd->data_sources = ds;
+
+ ds = gd->data_sources + gd->data_sources_num;
+ memset (ds, 0, sizeof (*ds));
+
+ ds->file = strdup (file);
+ if (ds->file == NULL)
+ return (ENOMEM);
+
+ ds->name = strdup (ds_name);
+ if (ds->name == NULL)
+ {
+ free (ds->file);
+ return (ENOMEM);
+ }
+
+ ds->legend = NULL;
+ ds->color = get_random_color ();
+
+ gd->data_sources_num++;
+
+ return (0);
+} /* }}} int graph_def_add_ds */
+
+static graph_def_t *graph_def_from_rrd_file (char *file) /* {{{ */
+{
+ char *rrd_argv[] = { "info", file, NULL };
+ int rrd_argc = (sizeof (rrd_argv) / sizeof (rrd_argv[0])) - 1;
+ rrd_info_t *info;
+ rrd_info_t *ptr;
+ graph_def_t *gd;
+
+ gd = malloc (sizeof (*gd));
+ if (gd == NULL)
+ return (NULL);
+ memset (gd, 0, sizeof (*gd));
+
+ gd->data_sources = NULL;
+
+ info = rrd_info (rrd_argc, rrd_argv);
+ if (info == NULL)
+ {
+ printf ("%s: rrd_info (%s) failed.\n", __func__, file);
+ free (gd);
+ return (NULL);
+ }
+
+ for (ptr = info; ptr != NULL; ptr = ptr->next)
+ {
+ size_t keylen;
+ size_t dslen;
+
+ if (strncmp ("ds[", ptr->key, strlen ("ds[")) != 0)
+ continue;
+
+ keylen = strlen (ptr->key);
+ if (keylen < strlen ("ds[?].index"))
+ continue;
+
+ dslen = keylen - strlen ("ds[].index");
+ assert (dslen >= 1);
+
+ if (strcmp ("].index", ptr->key + (strlen ("ds[") + dslen)) != 0)
+ continue;
+
+ graph_def_add_ds (gd, file, ptr->key + strlen ("ds["), dslen);
+ }
-int action_graph (void)
+ rrd_info_free (info);
+
+ return (gd);
+} /* }}} graph_def_t *graph_def_from_rrd_file */
+
+static graph_def_t *graph_def_from_gl (const graph_list_t *gl) /* {{{ */
+{
+ char rrd_file[PATH_MAX];
+
+ if ((gl->plugin_instance == NULL) && (gl->type_instance == NULL))
+ snprintf (rrd_file, sizeof (rrd_file), "%s/%s/%s/%s.rrd",
+ DATA_DIR, gl->host, gl->plugin, gl->type);
+ else if (gl->type_instance == NULL)
+ snprintf (rrd_file, sizeof (rrd_file), "%s/%s/%s-%s/%s.rrd",
+ DATA_DIR, gl->host, gl->plugin, gl->plugin_instance, gl->type);
+ else if (gl->plugin_instance == NULL)
+ snprintf (rrd_file, sizeof (rrd_file), "%s/%s/%s/%s-%s.rrd",
+ DATA_DIR, gl->host, gl->plugin, gl->type, gl->type_instance);
+ else
+ snprintf (rrd_file, sizeof (rrd_file), "%s/%s/%s-%s/%s-%s.rrd",
+ DATA_DIR, gl->host, gl->plugin, gl->plugin_instance,
+ gl->type, gl->type_instance);
+ rrd_file[sizeof (rrd_file) - 1] = 0;
+
+ return (graph_def_from_rrd_file (rrd_file));
+} /* }}} graph_def_t *graph_def_from_gl */
+
+static int draw_graph_ds (graph_def_t *gd, /* {{{ */
+ size_t index, str_array_t *args)
+{
+ data_source_t *ds;
+
+ assert (index < gd->data_sources_num);
+
+ ds = gd->data_sources + index;
+
+ /* CDEFs */
+ array_append_format (args, "DEF:def_%04zu_min=%s:%s:MIN",
+ index, ds->file, ds->name);
+ array_append_format (args, "DEF:def_%04zu_avg=%s:%s:AVERAGE",
+ index, ds->file, ds->name);
+ array_append_format (args, "DEF:def_%04zu_max=%s:%s:MAX",
+ index, ds->file, ds->name);
+ /* VDEFs */
+ array_append_format (args, "VDEF:vdef_%04zu_min=def_%04zu_min,MINIMUM",
+ index, index);
+ array_append_format (args, "VDEF:vdef_%04zu_avg=def_%04zu_avg,AVERAGE",
+ index, index);
+ array_append_format (args, "VDEF:vdef_%04zu_max=def_%04zu_max,MAXIMUM",
+ index, index);
+ array_append_format (args, "VDEF:vdef_%04zu_lst=def_%04zu_avg,LAST",
+ index, index);
+
+ /* Graph part */
+ array_append_format (args, "LINE1:def_%04zu_avg#%06x:%s", index, ds->color,
+ (ds->legend != NULL) ? ds->legend : ds->name);
+ array_append_format (args, "GPRINT:vdef_%04zu_min:%%lg min,", index);
+ array_append_format (args, "GPRINT:vdef_%04zu_avg:%%lg avg,", index);
+ array_append_format (args, "GPRINT:vdef_%04zu_max:%%lg max,", index);
+ array_append_format (args, "GPRINT:vdef_%04zu_lst:%%lg last\\l", index);
+
+ return (0);
+} /* }}} int draw_graph_ds */
+
+static void emulate_graph (int argc, char **argv) /* {{{ */
{
- printf ("Content-Type: text/plain\n\n"
- "Hello, this is %s\n", __func__);
+ int i;
+
+ printf ("rrdtool \\\n");
+ for (i = 0; i < argc; i++)
+ {
+ if (i < (argc - 1))
+ printf (" \"%s\" \\\n", argv[i]);
+ else
+ printf (" \"%s\"\n", argv[i]);
+ }
+} /* }}} void emulate_graph */
+
+static int ag_info_print (rrd_info_t *info)
+{
+ if (info->type == RD_I_VAL)
+ printf ("[info] %s = %g;\n", info->key, info->value.u_val);
+ else if (info->type == RD_I_CNT)
+ printf ("[info] %s = %lu;\n", info->key, info->value.u_cnt);
+ else if (info->type == RD_I_STR)
+ printf ("[info] %s = %s;\n", info->key, info->value.u_str);
+ else if (info->type == RD_I_INT)
+ printf ("[info] %s = %i;\n", info->key, info->value.u_int);
+ else if (info->type == RD_I_BLO)
+ printf ("[info] %s = [blob, %lu bytes];\n", info->key, info->value.u_blo.size);
+ else
+ printf ("[info] %s = [unknown type %#x];\n", info->key, info->type);
+
+ return (0);
+} /* }}} int ag_info_print */
+
+static int output_graph (rrd_info_t *info)
+{
+ rrd_info_t *img;
+
+ for (img = info; img != NULL; img = img->next)
+ if ((strcmp ("image", img->key) == 0)
+ && (img->type == RD_I_BLO))
+ break;
+
+ if (img == NULL)
+ return (ENOENT);
+
+ printf ("Content-Type: image/png\n"
+ "Content-Length: %lu\n"
+ "\n",
+ img->value.u_blo.size);
+ fwrite (img->value.u_blo.ptr, img->value.u_blo.size,
+ /* nmemb = */ 1, stdout);
+
+ return (0);
+} /* }}} int output_graph */
+
+static int draw_graph (graph_def_t *gd) /* {{{ */
+{
+ str_array_t *args;
+ rrd_info_t *info;
+ size_t i;
+
+ args = array_create ();
+ if (args == NULL)
+ return (ENOMEM);
+
+ array_append (args, "graph");
+ array_append (args, "-");
+ array_append (args, "--imgformat");
+ array_append (args, "PNG");
+
+ for (i = 0; i < gd->data_sources_num; i++)
+ draw_graph_ds (gd, i, args);
+
+ rrd_clear_error ();
+ info = rrd_graph_v (array_argc (args), array_argv (args));
+ if ((info == NULL) || rrd_test_error ())
+ {
+ printf ("Content-Type: text/plain\n\n");
+ printf ("rrd_graph_v failed: %s\n", rrd_get_error ());
+ emulate_graph (array_argc (args), array_argv (args));
+ }
+ else
+ {
+ int status;
+
+ status = output_graph (info);
+ if (status != 0)
+ {
+ rrd_info_t *ptr;
+
+ printf ("Content-Type: text/plain\n\n");
+ printf ("output_graph failed. Maybe the \"image\" info was not found?\n\n");
+
+ for (ptr = info; ptr != NULL; ptr = ptr->next)
+ {
+ ag_info_print (ptr);
+ }
+ }
+ }
+
+ if (info != NULL)
+ rrd_info_free (info);
+
+ array_destroy (args);
+
+ return (0);
+} /* }}} int draw_graph */
+
+static int init_gl (graph_list_t *gl) /* {{{ */
+{
+ gl->host = param ("host");
+ gl->plugin = param ("plugin");
+ gl->plugin_instance = param ("plugin_instance");
+ gl->type = param ("type");
+ gl->type_instance = param ("type_instance");
+
+ if ((gl->host == NULL)
+ || (gl->plugin == NULL)
+ || (gl->type == NULL))
+ return (EINVAL);
+
+ if ((gl->host[0] == 0) || (gl->host[0] == '.')
+ || (gl->plugin[0] == 0) || (gl->plugin[0] == '.')
+ || (gl->type[0] == 0) || (gl->type[0] == '.'))
+ return (EINVAL);
+
+ if ((strchr (gl->plugin, '-') != NULL)
+ || (strchr (gl->type, '-') != NULL))
+ return (EINVAL);
+
+ if ((gl->plugin_instance != NULL)
+ && (gl->plugin_instance[0] == 0))
+ gl->plugin_instance = NULL;
+
+ if ((gl->type_instance != NULL)
+ && (gl->type_instance[0] == 0))
+ gl->type_instance = NULL;
+
+ return (0);
+} /* }}} int init_gl */
+
+int action_graph (void) /* {{{ */
+{
+ graph_list_t gl;
+ graph_def_t *gd;
+ int status;
+
+ memset (&gl, 0, sizeof (gl));
+ status = init_gl (&gl);
+ if (status != 0)
+ {
+ printf ("Content-Type: text/plain\n\n"
+ "init_gl failed with status %i.\n", status);
+ return (status);
+ }
+
+ gd = graph_def_from_gl (&gl);
+ if (gd == NULL)
+ {
+ printf ("graph_def_from_gl failed.\n");
+ return (0);
+ }
+
+ draw_graph (gd);
+ graph_def_free (gd);
return (0);
} /* }}} int action_graph */
projects / collection4.git / blobdiff