1 /*
2 * rrdtoolmodule.c
3 *
4 * RRDTool Python binding
5 *
6 * Author : Hye-Shik Chang <perky@fallin.lv>
7 * Date : $Date: 2003/02/22 07:41:19 $
8 * Created : 23 May 2002
9 *
10 * $Revision: 1.14 $
11 *
12 * ==========================================================================
13 * This file is part of py-rrdtool.
14 *
15 * py-rrdtool is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU Lesser General Public License as published
17 * by the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * py-rrdtool is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU Lesser General Public License for more details.
24 *
25 * You should have received a copy of the GNU Lesser General Public License
26 * along with Foobar; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 *
29 */
31 #ifdef UNUSED
32 #elif defined(__GNUC__)
33 # define UNUSED(x) x __attribute__((unused))
34 #elif defined(__LCLINT__)
35 # define UNUSED(x) /*@unused@*/ x
36 #else
37 # define UNUSED(x) x
38 #endif
40 static const char *__version__ = "$Revision: 1.14 $";
42 #include "Python.h"
43 #include "rrd.h"
44 #include "rrd_extra.h"
46 static PyObject *ErrorObject;
47 extern int optind;
48 extern int opterr;
50 /* forward declaration to keep compiler happy */
51 void initrrdtool(void);
53 static int
54 create_args(char *command, PyObject *args, int *argc, char ***argv)
55 {
56 PyObject *o;
57 int size, i;
59 size = PyTuple_Size(args);
60 *argv = PyMem_New(char *, size + 1);
61 if (*argv == NULL)
62 return -1;
64 for (i = 0; i < size; i++) {
65 o = PyTuple_GET_ITEM(args, i);
66 if (PyString_Check(o))
67 (*argv)[i + 1] = PyString_AS_STRING(o);
68 else {
69 PyMem_Del(*argv);
70 PyErr_Format(PyExc_TypeError, "argument %d must be string", i);
71 return -1;
72 }
73 }
74 (*argv)[0] = command;
75 *argc = size + 1;
77 /* reset getopt state */
78 opterr = optind = 0;
80 return 0;
81 }
83 static void
84 destroy_args(char ***argv)
85 {
86 PyMem_Del(*argv);
87 *argv = NULL;
88 }
90 static char PyRRD_create__doc__[] =
91 "create(args..): Set up a new Round Robin Database\n\
92 create filename [--start|-b start time] \
93 [--step|-s step] [DS:ds-name:DST:heartbeat:min:max] \
94 [RRA:CF:xff:steps:rows]";
96 static PyObject *
97 PyRRD_create(PyObject UNUSED(*self), PyObject *args)
98 {
99 PyObject *r;
100 char **argv;
101 int argc;
103 if (create_args("create", args, &argc, &argv) < 0)
104 return NULL;
106 if (rrd_create(argc, argv) == -1) {
107 PyErr_SetString(ErrorObject, rrd_get_error());
108 rrd_clear_error();
109 r = NULL;
110 } else {
111 Py_INCREF(Py_None);
112 r = Py_None;
113 }
115 destroy_args(&argv);
116 return r;
117 }
119 static char PyRRD_update__doc__[] =
120 "update(args..): Store a new set of values into the rrd\n"
121 " update filename [--template|-t ds-name[:ds-name]...] "
122 "N|timestamp:value[:value...] [timestamp:value[:value...] ...]";
124 static PyObject *
125 PyRRD_update(PyObject UNUSED(*self), PyObject *args)
126 {
127 PyObject *r;
128 char **argv;
129 int argc;
131 if (create_args("update", args, &argc, &argv) < 0)
132 return NULL;
134 if (rrd_update(argc, argv) == -1) {
135 PyErr_SetString(ErrorObject, rrd_get_error());
136 rrd_clear_error();
137 r = NULL;
138 } else {
139 Py_INCREF(Py_None);
140 r = Py_None;
141 }
143 destroy_args(&argv);
144 return r;
145 }
147 static char PyRRD_fetch__doc__[] =
148 "fetch(args..): fetch data from an rrd.\n"
149 " fetch filename CF [--resolution|-r resolution] "
150 "[--start|-s start] [--end|-e end]";
152 static PyObject *
153 PyRRD_fetch(PyObject UNUSED(*self), PyObject *args)
154 {
155 PyObject *r;
156 rrd_value_t *data, *datai;
157 unsigned long step, ds_cnt;
158 time_t start, end;
159 int argc;
160 char **argv, **ds_namv;
162 if (create_args("fetch", args, &argc, &argv) < 0)
163 return NULL;
165 if (rrd_fetch(argc, argv, &start, &end, &step,
166 &ds_cnt, &ds_namv, &data) == -1) {
167 PyErr_SetString(ErrorObject, rrd_get_error());
168 rrd_clear_error();
169 r = NULL;
170 } else {
171 /* Return :
172 ((start, end, step), (name1, name2, ...), [(data1, data2, ..), ...]) */
173 PyObject *range_tup, *dsnam_tup, *data_list, *t;
174 unsigned long i, j, row;
175 rrd_value_t dv;
177 row = ((end - start) / step + 1);
179 r = PyTuple_New(3);
180 range_tup = PyTuple_New(3);
181 dsnam_tup = PyTuple_New(ds_cnt);
182 data_list = PyList_New(row);
183 PyTuple_SET_ITEM(r, 0, range_tup);
184 PyTuple_SET_ITEM(r, 1, dsnam_tup);
185 PyTuple_SET_ITEM(r, 2, data_list);
187 datai = data;
189 PyTuple_SET_ITEM(range_tup, 0, PyInt_FromLong((long)start));
190 PyTuple_SET_ITEM(range_tup, 1, PyInt_FromLong((long)end));
191 PyTuple_SET_ITEM(range_tup, 2, PyInt_FromLong((long)step));
193 for (i = 0; i < ds_cnt; i++)
194 PyTuple_SET_ITEM(dsnam_tup, i, PyString_FromString(ds_namv[i]));
196 for (i = 0; i < row; i ++) {
197 t = PyTuple_New(ds_cnt);
198 PyList_SET_ITEM(data_list, i, t);
200 for (j = 0; j < ds_cnt; j++) {
201 dv = *(datai++);
202 if (isnan(dv)) {
203 PyTuple_SET_ITEM(t, j, Py_None);
204 Py_INCREF(Py_None);
205 } else {
206 PyTuple_SET_ITEM(t, j, PyFloat_FromDouble((double)dv));
207 }
208 }
209 }
211 for (i = 0; i < ds_cnt; i++)
212 free(ds_namv[i]);
213 free(ds_namv); /* rrdtool don't use PyMem_Malloc :) */
214 free(data);
215 }
217 destroy_args(&argv);
218 return r;
219 }
221 static char PyRRD_graph__doc__[] =
222 "graph(args..): Create a graph based on data from one or several RRD\n"
223 " graph filename [-s|--start seconds] "
224 "[-e|--end seconds] [-x|--x-grid x-axis grid and label] "
225 "[-y|--y-grid y-axis grid and label] [--alt-y-grid] [--alt-y-mrtg] "
226 "[--alt-autoscale] [--alt-autoscale-max] [--units-exponent] value "
227 "[-v|--vertical-label text] [-w|--width pixels] [-h|--height pixels] "
228 "[-i|--interlaced] "
229 "[-f|--imginfo formatstring] [-a|--imgformat GIF|PNG|GD] "
230 "[-B|--background value] [-O|--overlay value] "
231 "[-U|--unit value] [-z|--lazy] [-o|--logarithmic] "
232 "[-u|--upper-limit value] [-l|--lower-limit value] "
233 "[-g|--no-legend] [-r|--rigid] [--step value] "
234 "[-b|--base value] [-c|--color COLORTAG#rrggbb] "
235 "[-t|--title title] [DEF:vname=rrd:ds-name:CF] "
236 "[CDEF:vname=rpn-expression] [PRINT:vname:CF:format] "
237 "[GPRINT:vname:CF:format] [COMMENT:text] "
238 "[HRULE:value#rrggbb[:legend]] [VRULE:time#rrggbb[:legend]] "
239 "[LINE{1|2|3}:vname[#rrggbb[:legend]]] "
240 "[AREA:vname[#rrggbb[:legend]]] "
241 "[STACK:vname[#rrggbb[:legend]]]";
243 static PyObject *
244 PyRRD_graph(PyObject UNUSED(*self), PyObject *args)
245 {
246 PyObject *r;
247 char **argv, **calcpr;
248 int argc, xsize, ysize, i;
249 double ymin, ymax;
250 if (create_args("graph", args, &argc, &argv) < 0)
251 return NULL;
253 if (rrd_graph(argc, argv, &calcpr, &xsize, &ysize, NULL, &ymin, &ymax) == -1) {
254 PyErr_SetString(ErrorObject, rrd_get_error());
255 rrd_clear_error();
256 r = NULL;
257 } else {
258 r = PyTuple_New(3);
260 PyTuple_SET_ITEM(r, 0, PyInt_FromLong((long)xsize));
261 PyTuple_SET_ITEM(r, 1, PyInt_FromLong((long)ysize));
263 if (calcpr) {
264 PyObject *e, *t;
266 e = PyList_New(0);
267 PyTuple_SET_ITEM(r, 2, e);
269 for(i = 0; calcpr[i]; i++) {
270 t = PyString_FromString(calcpr[i]);
271 PyList_Append(e, t);
272 Py_DECREF(t);
273 free(calcpr[i]);
274 }
275 free(calcpr);
276 } else {
277 Py_INCREF(Py_None);
278 PyTuple_SET_ITEM(r, 2, Py_None);
279 }
280 }
282 destroy_args(&argv);
283 return r;
284 }
286 static char PyRRD_tune__doc__[] =
287 "tune(args...): Modify some basic properties of a Round Robin Database\n"
288 " tune filename [--heartbeat|-h ds-name:heartbeat] "
289 "[--minimum|-i ds-name:min] [--maximum|-a ds-name:max] "
290 "[--data-source-type|-d ds-name:DST] [--data-source-rename|-r old-name:new-name]";
292 static PyObject *
293 PyRRD_tune(PyObject UNUSED(*self), PyObject *args)
294 {
295 PyObject *r;
296 char **argv;
297 int argc;
299 if (create_args("tune", args, &argc, &argv) < 0)
300 return NULL;
302 if (rrd_tune(argc, argv) == -1) {
303 PyErr_SetString(ErrorObject, rrd_get_error());
304 rrd_clear_error();
305 r = NULL;
306 } else {
307 Py_INCREF(Py_None);
308 r = Py_None;
309 }
311 destroy_args(&argv);
312 return r;
313 }
315 static char PyRRD_last__doc__[] =
316 "last(filename): Return the timestamp of the last data sample in an RRD";
318 static PyObject *
319 PyRRD_last(PyObject UNUSED(*self), PyObject *args)
320 {
321 PyObject *r;
322 int argc, ts;
323 char **argv;
325 if (create_args("last", args, &argc, &argv) < 0)
326 return NULL;
328 if ((ts = rrd_last(argc, argv)) == -1) {
329 PyErr_SetString(ErrorObject, rrd_get_error());
330 rrd_clear_error();
331 r = NULL;
332 } else
333 r = PyInt_FromLong((long)ts);
335 destroy_args(&argv);
336 return r;
337 }
339 static char PyRRD_resize__doc__[] =
340 "resize(args...): alters the size of an RRA.\n"
341 " resize filename rra-num GROW|SHRINK rows";
343 static PyObject *
344 PyRRD_resize(PyObject UNUSED(*self), PyObject *args)
345 {
346 PyObject *r;
347 char **argv;
348 int argc, ts;
350 if (create_args("resize", args, &argc, &argv) < 0)
351 return NULL;
353 if ((ts = rrd_resize(argc, argv)) == -1) {
354 PyErr_SetString(ErrorObject, rrd_get_error());
355 rrd_clear_error();
356 r = NULL;
357 } else {
358 Py_INCREF(Py_None);
359 r = Py_None;
360 }
362 destroy_args(&argv);
363 return r;
364 }
366 static char PyRRD_info__doc__[] =
367 "info(filename): extract header information from an rrd";
369 static PyObject *
370 PyRRD_info(PyObject UNUSED(*self), PyObject *args)
371 {
372 PyObject *r, *t, *ds;
373 rrd_t rrd;
374 FILE *in_file;
375 char *filename;
376 unsigned long i, j;
378 if (! PyArg_ParseTuple(args, "s:info", &filename))
379 return NULL;
381 if (rrd_open(filename, &in_file, &rrd, RRD_READONLY) == -1) {
382 PyErr_SetString(ErrorObject, rrd_get_error());
383 rrd_clear_error();
384 return NULL;
385 }
386 fclose(in_file);
388 #define DICTSET_STR(dict, name, value) \
389 t = PyString_FromString(value); \
390 PyDict_SetItemString(dict, name, t); \
391 Py_DECREF(t);
393 #define DICTSET_CNT(dict, name, value) \
394 t = PyInt_FromLong((long)value); \
395 PyDict_SetItemString(dict, name, t); \
396 Py_DECREF(t);
398 #define DICTSET_VAL(dict, name, value) \
399 t = isnan(value) ? (Py_INCREF(Py_None), Py_None) : \
400 PyFloat_FromDouble((double)value); \
401 PyDict_SetItemString(dict, name, t); \
402 Py_DECREF(t);
404 r = PyDict_New();
406 DICTSET_STR(r, "filename", filename);
407 DICTSET_STR(r, "rrd_version", rrd.stat_head->version);
408 DICTSET_CNT(r, "step", rrd.stat_head->pdp_step);
409 DICTSET_CNT(r, "last_update", rrd.live_head->last_up);
411 ds = PyDict_New();
412 PyDict_SetItemString(r, "ds", ds);
413 Py_DECREF(ds);
415 for (i = 0; i < rrd.stat_head->ds_cnt; i++) {
416 PyObject *d;
418 d = PyDict_New();
419 PyDict_SetItemString(ds, rrd.ds_def[i].ds_nam, d);
420 Py_DECREF(d);
422 DICTSET_STR(d, "ds_name", rrd.ds_def[i].ds_nam);
423 DICTSET_STR(d, "type", rrd.ds_def[i].dst);
424 DICTSET_CNT(d, "minimal_heartbeat", rrd.ds_def[i].par[DS_mrhb_cnt].u_cnt);
425 DICTSET_VAL(d, "min", rrd.ds_def[i].par[DS_min_val].u_val);
426 DICTSET_VAL(d, "max", rrd.ds_def[i].par[DS_max_val].u_val);
427 DICTSET_STR(d, "last_ds", rrd.pdp_prep[i].last_ds);
428 DICTSET_VAL(d, "value", rrd.pdp_prep[i].scratch[PDP_val].u_val);
429 DICTSET_CNT(d, "unknown_sec", rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt);
430 }
432 ds = PyList_New(rrd.stat_head->rra_cnt);
433 PyDict_SetItemString(r, "rra", ds);
434 Py_DECREF(ds);
436 for (i = 0; i < rrd.stat_head->rra_cnt; i++) {
437 PyObject *d, *cdp;
439 d = PyDict_New();
440 PyList_SET_ITEM(ds, i, d);
442 DICTSET_STR(d, "cf", rrd.rra_def[i].cf_nam);
443 DICTSET_CNT(d, "rows", rrd.rra_def[i].row_cnt);
444 DICTSET_CNT(d, "pdp_per_row", rrd.rra_def[i].pdp_cnt);
445 DICTSET_VAL(d, "xff", rrd.rra_def[i].par[RRA_cdp_xff_val].u_val);
447 cdp = PyList_New(rrd.stat_head->ds_cnt);
448 PyDict_SetItemString(d, "cdp_prep", cdp);
449 Py_DECREF(cdp);
451 for (j = 0; j < rrd.stat_head->ds_cnt; j++) {
452 PyObject *cdd;
454 cdd = PyDict_New();
455 PyList_SET_ITEM(cdp, j, cdd);
457 DICTSET_VAL(cdd, "value",
458 rrd.cdp_prep[i*rrd.stat_head->ds_cnt+j].scratch[CDP_val].u_val);
459 DICTSET_CNT(cdd, "unknown_datapoints",
460 rrd.cdp_prep[i*rrd.stat_head->ds_cnt+j].scratch[CDP_unkn_pdp_cnt].u_cnt);
461 }
462 }
464 rrd_free(&rrd);
466 return r;
467 }
469 /* List of methods defined in the module */
470 #define meth(name, func, doc) {name, (PyCFunction)func, METH_VARARGS, doc}
472 static PyMethodDef _rrdtool_methods[] = {
473 meth("create", PyRRD_create, PyRRD_create__doc__),
474 meth("update", PyRRD_update, PyRRD_update__doc__),
475 meth("fetch", PyRRD_fetch, PyRRD_fetch__doc__),
476 meth("graph", PyRRD_graph, PyRRD_graph__doc__),
477 meth("tune", PyRRD_tune, PyRRD_tune__doc__),
478 meth("last", PyRRD_last, PyRRD_last__doc__),
479 meth("resize", PyRRD_resize, PyRRD_resize__doc__),
480 meth("info", PyRRD_info, PyRRD_info__doc__),
481 {NULL, NULL}
482 };
484 #define SET_INTCONSTANT(dict, value) \
485 t = PyInt_FromLong((long)value); \
486 PyDict_SetItemString(dict, #value, t); \
487 Py_DECREF(t);
488 #define SET_STRCONSTANT(dict, value) \
489 t = PyString_FromString(value); \
490 PyDict_SetItemString(dict, #value, t); \
491 Py_DECREF(t);
493 /* Initialization function for the module */
494 void
495 initrrdtool(void)
496 {
497 PyObject *m, *d, *t;
499 /* Create the module and add the functions */
500 m = Py_InitModule("rrdtool", _rrdtool_methods);
502 /* Add some symbolic constants to the module */
503 d = PyModule_GetDict(m);
505 SET_STRCONSTANT(d, __version__);
506 ErrorObject = PyErr_NewException("_rrdtool.error", NULL, NULL);
507 PyDict_SetItemString(d, "error", ErrorObject);
509 /* Check for errors */
510 if (PyErr_Occurred())
511 Py_FatalError("can't initialize the rrdtool module");
512 }
514 /*
515 * $Id: _rrdtoolmodule.c,v 1.14 2003/02/22 07:41:19 perky Exp $
516 * ex: ts=8 sts=4 et
517 */