/*
- * rrdtool-py3k, rrdtool bindings for Python 3
+ * rrdtool-py3k, rrdtool bindings for Python 3.
+ * Based on the rrdtool Python bindings for Python 2 from
+ * Hye-Shik Chang <perky@fallin.lv>.
*
* Copyright 2012 Christian Jurk <commx@commx.ws>
*
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
- *
*/
#include <Python.h>
static PyObject *rrdtool_OperationalError;
static PyObject *rrdtool_ProgrammingError;
-/* Wrapper for rrd_create() */
+static char **rrdtool_argv = NULL;
+static int rrdtool_argc = 0;
+
+static void
+destroy_args(void)
+{
+ PyMem_Del(rrdtool_argv);
+ rrdtool_argv = NULL;
+}
+
+/* Helper function to convert Python objects into a representation that the
+ * rrdtool functions can work with.
+ */
+static int
+convert_args(char *command, PyObject *args)
+{
+ PyObject *o, *lo;
+ int i, j, args_count, argv_count, element_count;
+
+ args_count = PyTuple_Size(args);
+ element_count = 0;
+ for (i = 0; i < args_count; i++)
+ {
+ o = PyTuple_GET_ITEM(args, i);
+ if (PyUnicode_Check(o) || PyBytes_Check(o))
+ element_count++;
+ else if (PyList_CheckExact(o))
+ element_count += PyList_Size(o);
+ else {
+ PyErr_Format(rrdtool_ProgrammingError,
+ "Argument %d must be string, bytes or list of " \
+ "string/bytes", i);
+ return -1;
+ }
+ }
+
+ rrdtool_argv = PyMem_New(char *, element_count + 1);
+
+ if (rrdtool_argv == NULL)
+ return -1;
+
+ argv_count = 0;
+ for (i = 0; i < args_count; i++) {
+ o = PyTuple_GET_ITEM(args, i);
+
+ if (PyUnicode_Check(o))
+ rrdtool_argv[++argv_count] = PyBytes_AsString(
+ PyUnicode_AsUTF8String(o));
+ else if (PyBytes_Check(o))
+ rrdtool_argv[++argv_count] = PyBytes_AS_STRING(o);
+ else if (PyList_CheckExact(o)) {
+ for (j = 0; j < PyList_Size(o); j++) {
+ lo = PyList_GetItem(o, j);
+ if (PyUnicode_Check(lo))
+ rrdtool_argv[++argv_count] = PyBytes_AS_STRING(
+ PyUnicode_AsUTF8String(lo));
+ else if (PyBytes_Check(lo))
+ rrdtool_argv[++argv_count] = PyBytes_AS_STRING(lo);
+ else {
+ PyMem_Del(rrdtool_argv);
+ PyErr_Format(rrdtool_ProgrammingError,
+ "Element %d in argument %d must be string", j, i);
+ return -1;
+ }
+ }
+ } else {
+ PyMem_Del(rrdtool_argv);
+ PyErr_Format(rrdtool_ProgrammingError,
+ "Argument %d must be string or list of strings", i);
+ return -1;
+ }
+ }
+
+ rrdtool_argv[0] = command;
+ rrdtool_argc = element_count + 1;
+
+ return 0;
+}
+
+static char _rrdtool_create__doc__[] = "Create a new Round Robin Database.\n\n\
+ Usage: create(args...)\n\
+ Arguments:\n\n\
+ filename\n\
+ [--start|-b start time]\n\
+ [--step|-s step]\n\
+ [DS:ds-name:DST:heartbeat:min:max]\n\
+ [RRA:CF:xff:steps:rows]\n\n\
+ Full documentation can be found at:\n\
+ http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html";
+
static PyObject *
_rrdtool_create(PyObject *self, PyObject *args)
{
- PyObject *o;
- char **argv;
- int i, argc;
-
- argc = PyTuple_Size(args);
- argv = PyMem_New(char *, argc + 1);
-
- for (i = 0; i < argc; i++) {
- o = PyTuple_GET_ITEM(args, i);
- if (!PyBytes_Check(o)) {
- if (!PyUnicode_Check(o)) {
- PyErr_Format(rrdtool_ProgrammingError,
- "Argument %d must be a unicode or bytes object",
- i);
- PyMem_Del(argv);
- return NULL;
- } else
- argv[i+1] = PyBytes_AS_STRING(PyUnicode_AsUTF8String(o));
-
- } else
- argv[i+1] = PyBytes_AS_STRING(o);
-
- }
-
- if (argc == 0) {
- PyErr_SetString(rrdtool_ProgrammingError, "No arguments specified.");
- PyMem_Del(argv);
- return NULL;
- }
+ PyObject *ret;
- argv[0] = "create";
+ if (convert_args("create", args) == -1)
+ return NULL;
- if (rrd_create(argc + 1, argv) == -1) {
+ if (rrd_create(rrdtool_argc, rrdtool_argv) == -1) {
PyErr_SetString(rrdtool_OperationalError, rrd_get_error());
rrd_clear_error();
- PyMem_Del(argv);
- return NULL;
- }
+ ret = NULL;
+ } else {
+ Py_INCREF(Py_None);
+ ret = Py_None;
+ }
+
+ destroy_args();
+ return ret;
+}
+
+static char _rrdtool_update__doc__[] = "Store a new set of values into\
+ the RRD.\n\n\
+ Usage: update(args..)\n\
+ Arguments:\n\n\
+ filename\n\
+ [--template|-t ds-name[:ds-name]...]\n\
+ N|timestamp:value[:value...]\n\
+ [timestamp:value[:value...] ...]\n\n\
+ Full documentation can be found at:\n\
+ http://oss.oetiker.ch/rrdtool/doc/rrdupdate.en.html";
+
+static PyObject *
+_rrdtool_update(PyObject *self, PyObject *args)
+{
+ PyObject *ret;
+
+ if (convert_args("update", args) == -1)
+ return NULL;
+
+ if (rrd_update(rrdtool_argc, rrdtool_argv) == -1) {
+ PyErr_SetString(rrdtool_OperationalError, rrd_get_error());
+ rrd_clear_error();
+ ret = NULL;
+ } else {
+ Py_INCREF(Py_None);
+ ret = Py_None;
+ }
+
+ destroy_args();
+ return ret;
+}
+
+static char _rrdtool_fetch__doc__[] = "Fetch data from an RRD.\n\n\
+ Usage: fetch(args..)\n\
+ Arguments:\n\n\
+ filename\n\
+ CF\n\
+ [--resolution|-r resolution]\n\
+ [--start|-s start]\n\
+ [--end|-e end]\n\n\
+ Full documentation can be found at:\n\
+ http://oss.oetiker.ch/rrdtool/doc/rrdfetch.en.html";
+
+static PyObject *
+_rrdtool_fetch(PyObject *self, PyObject *args)
+{
+ PyObject *ret, *range_tup, *dsnam_tup, *data_list, *t;
+ rrd_value_t *data, *datai, dv;
+ unsigned long step, ds_cnt, i, j, row;
+ time_t start, end;
+ char **ds_namv;
+
+ if (convert_args("fetch", args) == -1)
+ return NULL;
+
+ if (rrd_fetch(rrdtool_argc, rrdtool_argv, &start, &end, &step, &ds_cnt,
+ &ds_namv, &data) == -1) {
+ PyErr_SetString(rrdtool_OperationalError, rrd_get_error());
+ rrd_clear_error();
+ ret = NULL;
+ } else {
+ row = (end - start) / step;
+ ret = PyTuple_New(3);
+ range_tup = PyTuple_New(3);
+ dsnam_tup = PyTuple_New(ds_cnt);
+ data_list = PyList_New(row);
+
+ PyTuple_SET_ITEM(ret, 0, range_tup);
+ PyTuple_SET_ITEM(ret, 1, dsnam_tup);
+ PyTuple_SET_ITEM(ret, 2, data_list);
+
+ datai = data;
+
+ PyTuple_SET_ITEM(range_tup, 0, PyLong_FromLong((long)start));
+ PyTuple_SET_ITEM(range_tup, 1, PyLong_FromLong((long)end));
+ PyTuple_SET_ITEM(range_tup, 2, PyLong_FromLong((long)step));
+
+ for (i = 0; i < ds_cnt; i++)
+ PyTuple_SET_ITEM(dsnam_tup, i, PyUnicode_FromString(ds_namv[i]));
+
+ for (i = 0; i < row; i++) {
+ t = PyTuple_New(ds_cnt);
+ PyList_SET_ITEM(data_list, i, t);
+
+ for (j = 0; j < ds_cnt; j++) {
+ dv = *(datai++);
+ if (isnan(dv)) {
+ PyTuple_SET_ITEM(t, j, Py_None);
+ Py_INCREF(Py_None);
+ } else
+ PyTuple_SET_ITEM(t, j, PyFloat_FromDouble((double)dv));
+ }
+ }
+
+ for (i = 0; i < ds_cnt; i++)
+ rrd_freemem(ds_namv[i]);
+
+ rrd_freemem(ds_namv);
+ rrd_freemem(data);
+ }
+
+ destroy_args();
+ return ret;
+}
+
+static char _rrdtool_graph__doc__[] = "Create a graph based on one or more " \
+ "RRDs.\n\n\
+ Usage: graph(args..)\n\
+ Arguments:\n\n\
+ filename | -\n\
+ [-s|--start start]\n\
+ [-e|--end end]\n\
+ [-S|--step step]\n\
+ [-t|--title string]\n\
+ [-v|--vertical-label string]\n\
+ [-w|--width pixels]\n\
+ [-h|--height pixels]\n\
+ [-j|--only-graph]\n\
+ [-D|--full-size-mode]\n\
+ [-u|--upper-limit value]\n\
+ [-l|--lower-limit value]\n\
+ [-r|--rigid]\n\
+ [-A|--alt-autoscale]\n\
+ [-J|--alt-autoscale-min]\n\
+ [-M|--alt-autoscale-max]\n\
+ [-N|--no-gridfit]\n\
+ [-x|--x-grid (GTM:GST:MTM:MST:LTM:LST:LPR:LFM|none)]\n\
+ [-y|--y-grid (grid step:label factor|none)]\n\
+ [-Y|--alt-y-grid]\n\
+ [-o|--logarithmic]\n\
+ [-X|--units-exponent value]\n\
+ [-L|--units-length value]\n\
+ [--units=si]\n\
+ [--right-axis scale:shift]\n\
+ [--right-axis-label label]\n\
+ [--right-axis-format format-string]\n\
+ [-g|--no-legend]\n\
+ [-F|--force-rules-legend]\n\
+ [--legend-position=(north|south|west|east)]\n\
+ [--legend-direction=(topdown|bottomup)]\n\
+ [-z|--lazy]\n\
+ [--daemon address]\n\
+ [-f|--imginfo printfstr]\n\
+ [-c|--color COLORTAG#rrggbb[aa]]\n\
+ [--grid-dash on:off]\n\
+ [--border width]\n\
+ [--dynamic-labels]\n\
+ [-m|--zoom factor]\n\
+ [-n|--font FONTTAG:size:[font]]\n\
+ [-R|--font-render-mode {normal,light,mono}]\n\
+ [-B|--font-smoothing-threshold size]\n\
+ [-P|--pango-markup]\n\
+ [-G|--graph-render-mode {normal,mono}]\n\
+ [-E|--slope-mode]\n\
+ [-a|--imgformat {PNG,SVG,EPS,PDF}]\n\
+ [-T|--tabwidth value]\n\
+ [-b|--base value]\n\
+ [-W|--watermark string]\n\
+ DEF:vname=rrdfile:ds-name:CF[:step=step][:start=time][:end=time]\n\
+ CDEF:vname=RPN expression\n\
+ VDEF=vname:RPN expression\n\n\
+ Full documentation can be found at:\n\
+ http://oss.oetiker.ch/rrdtool/doc/rrdgraph.en.html";
+
+static PyObject *
+_rrdtool_graph(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+ PyObject *ret;
+ int orig_stdout, op[2], xsize, ysize, i;
+ int keep_in_mem = 0;
+ double ymin, ymax;
+ char **calcpr;
+
+ if (convert_args("graph", args) == -1)
+ return NULL;
+
+ if (rrdtool_argc >= 2 && strcmp(rrdtool_argv[1], "-") == 0)
+ keep_in_mem = 1;
+
+ if (keep_in_mem) {
+ orig_stdout = dup(STDOUT_FILENO);
+ if (pipe(op) != 0) {
+ PyErr_Format(rrdtool_OperationalError,
+ "Cannot create pipe for stdout: %s", strerror(errno));
+ ret = NULL;
+ } else {
+ dup2(op[1], STDOUT_FILENO);
+ close(op[1]);
+
+ // do something on stdout
+ // read(op[0], buffer, MAX_LEN);
+ }
+ }
+
+ if (rrd_graph(rrdtool_argc, rrdtool_argv, &calcpr, &xsize, &ysize, NULL,
+ &ymin, &ymax) == -1) {
+ PyErr_SetString(rrdtool_OperationalError, rrd_get_error());
+ rrd_clear_error();
+ ret = NULL;
+ } else {
+ ret = PyTuple_New(keep_in_mem ? 4 : 3);
+
+ PyTuple_SET_ITEM(ret, 0, PyLong_FromLong((long)xsize));
+ PyTuple_SET_ITEM(ret, 1, PyLong_FromLong((long)ysize));
+
+ if (calcpr) {
+ PyObject *e, *t;
+
+ e = PyList_New(0);
+ PyTuple_SET_ITEM(ret, 2, e);
+
+ for (i = 0; calcpr[i]; i++) {
+ t = PyUnicode_FromString(calcpr[i]);
+ PyList_Append(e, t);
+ Py_DECREF(t);
+ rrd_freemem(calcpr[i]);
+ }
+ } else {
+ Py_INCREF(Py_None);
+ PyTuple_SET_ITEM(ret, 2, Py_None);
+ }
+
+ /* feed buffered contents into a PyBytes object */
+ if (keep_in_mem) {
+ PyObject *pb;
+ ssize_t rs;
+ char buffer[4096];
+
+ pb = PyBytes_FromStringAndSize("", 0);
+ for (;;) {
+ if ((rs = read(op[0], buffer, 4096)) <= 0)
+ break;
+ else
+ PyBytes_Concat(&pb, PyBytes_FromStringAndSize(buffer, rs));
+ }
+
+ PyTuple_SET_ITEM(ret, 3, pb);
+ }
+ }
+
+ if (keep_in_mem)
+ dup2(orig_stdout, STDOUT_FILENO);
- Py_RETURN_TRUE;
+ destroy_args();
+ return ret;
}
static PyMethodDef rrdtool_methods[] = {
- {"create", (PyCFunction)_rrdtool_create, METH_VARARGS | METH_KEYWORDS,
- "Create a new Round Robin Database"},
+ {"create", (PyCFunction)_rrdtool_create,
+ METH_VARARGS, _rrdtool_create__doc__},
+ {"update", (PyCFunction)_rrdtool_update,
+ METH_VARARGS, _rrdtool_update__doc__},
+ {"fetch", (PyCFunction)_rrdtool_fetch,
+ METH_VARARGS, _rrdtool_fetch__doc__},
+ {"graph", (PyCFunction)_rrdtool_graph,
+ METH_VARARGS | METH_KEYWORDS, _rrdtool_graph__doc__},
{NULL, NULL, 0, NULL}
};
projects / people / ms / python-rrdtool.git / commitdiff
