summaryrefslogtreecommitdiff
path: root/source4/param/pyparam.c
blob: be29c724f1bffc8c6a914d4b5b805725b05d38fe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
/* 
   Unix SMB/CIFS implementation.
   Samba utility functions
   Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <Python.h>
#include "includes.h"
#include "param/param.h"
#include "param/loadparm.h"
#include "lib/talloc/pytalloc.h"

/* There's no Py_ssize_t in 2.4, apparently */
#if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION < 5
typedef int Py_ssize_t;
typedef inquiry lenfunc;
#endif

#define PyLoadparmContext_AsLoadparmContext(obj) py_talloc_get_type(obj, struct loadparm_context)
#define PyLoadparmService_AsLoadparmService(obj) py_talloc_get_type(obj, struct loadparm_service)

extern PyTypeObject PyLoadparmContext;
extern PyTypeObject PyLoadparmService;

PyObject *PyLoadparmService_FromService(struct loadparm_service *service)
{
	return py_talloc_reference(&PyLoadparmService, service);
}

static PyObject *py_lp_ctx_get_helper(struct loadparm_context *lp_ctx, const char *service_name, const char *param_name)
{
	struct parm_struct *parm = NULL;
	void *parm_ptr = NULL;
	int i;

	if (service_name != NULL && strwicmp(service_name, GLOBAL_NAME) && 
		strwicmp(service_name, GLOBAL_NAME2)) {
		struct loadparm_service *service;
		/* its a share parameter */
		service = lpcfg_service(lp_ctx, service_name);
		if (service == NULL) {
			return NULL;
		}
		if (strchr(param_name, ':')) {
			/* its a parametric option on a share */
			const char *type = talloc_strndup(lp_ctx, param_name,
											  strcspn(param_name, ":"));
			const char *option = strchr(param_name, ':') + 1;
			const char *value;
			if (type == NULL || option == NULL) {
			return NULL;
			}
			value = lpcfg_get_parametric(lp_ctx, service, type, option);
			if (value == NULL) {
			return NULL;
			}
			return PyString_FromString(value);
		}

		parm = lpcfg_parm_struct(param_name);
		if (parm == NULL || parm->pclass == P_GLOBAL) {
			return NULL;
		}
		parm_ptr = lpcfg_parm_ptr(lp_ctx, service, parm);
    } else if (strchr(param_name, ':')) {
		/* its a global parametric option */
		const char *type = talloc_strndup(lp_ctx,
				  param_name, strcspn(param_name, ":"));
		const char *option = strchr(param_name, ':') + 1;
		const char *value;
		if (type == NULL || option == NULL) {
			return NULL;
		}
		value = lpcfg_get_parametric(lp_ctx, NULL, type, option);
		if (value == NULL)
			return NULL;
		return PyString_FromString(value);
	} else {
		/* its a global parameter */
		parm = lpcfg_parm_struct(param_name);
		if (parm == NULL) {
			return NULL;
		}
		parm_ptr = lpcfg_parm_ptr(lp_ctx, NULL, parm);
	}

	if (parm == NULL || parm_ptr == NULL) {
		return NULL;
    }

    /* construct and return the right type of python object */
    switch (parm->type) {
    case P_STRING:
    case P_USTRING:
	return PyString_FromString(*(char **)parm_ptr);
    case P_BOOL:
	return PyBool_FromLong(*(bool *)parm_ptr);
    case P_INTEGER:
    case P_OCTAL:
    case P_BYTES:
	return PyLong_FromLong(*(int *)parm_ptr);
    case P_ENUM:
	for (i=0; parm->enum_list[i].name; i++) {
	    if (*(int *)parm_ptr == parm->enum_list[i].value) {
		return PyString_FromString(parm->enum_list[i].name);
	    }
	}
	return NULL;
    case P_LIST: 
	{
	    int j;
	    const char **strlist = *(const char ***)parm_ptr;
	    PyObject *pylist;
		
		if(strlist == NULL) {
			return PyList_New(0);
		}
		
		pylist = PyList_New(str_list_length(strlist));
	    for (j = 0; strlist[j]; j++) 
		PyList_SetItem(pylist, j, 
			       PyString_FromString(strlist[j]));
	    return pylist;
	}

	break;
    }
    return NULL;

}

static PyObject *py_lp_ctx_load(py_talloc_Object *self, PyObject *args)
{
	char *filename;
	bool ret;
	if (!PyArg_ParseTuple(args, "s", &filename))
		return NULL;

	ret = lpcfg_load(PyLoadparmContext_AsLoadparmContext(self), filename);

	if (!ret) {
		PyErr_Format(PyExc_RuntimeError, "Unable to load file %s", filename);
		return NULL;
	}
	Py_RETURN_NONE;
}

static PyObject *py_lp_ctx_load_default(py_talloc_Object *self)
{
	bool ret;
        ret = lpcfg_load_default(PyLoadparmContext_AsLoadparmContext(self));

	if (!ret) {
		PyErr_SetString(PyExc_RuntimeError, "Unable to load default file");
		return NULL;
	}
	Py_RETURN_NONE;
}

static PyObject *py_lp_ctx_get(py_talloc_Object *self, PyObject *args)
{
	char *param_name;
	char *section_name = NULL;
	PyObject *ret;
	if (!PyArg_ParseTuple(args, "s|z", &param_name, &section_name))
		return NULL;

	ret = py_lp_ctx_get_helper(PyLoadparmContext_AsLoadparmContext(self), section_name, param_name);
	if (ret == NULL)
		Py_RETURN_NONE;
	return ret;
}

static PyObject *py_lp_ctx_is_myname(py_talloc_Object *self, PyObject *args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s", &name))
		return NULL;

	return PyBool_FromLong(lpcfg_is_myname(PyLoadparmContext_AsLoadparmContext(self), name));
}

static PyObject *py_lp_ctx_is_mydomain(py_talloc_Object *self, PyObject *args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s", &name))
		return NULL;

	return PyBool_FromLong(lpcfg_is_mydomain(PyLoadparmContext_AsLoadparmContext(self), name));
}

static PyObject *py_lp_ctx_set(py_talloc_Object *self, PyObject *args)
{
	char *name, *value;
	bool ret;
	if (!PyArg_ParseTuple(args, "ss", &name, &value))
		return NULL;

	ret = lpcfg_set_cmdline(PyLoadparmContext_AsLoadparmContext(self), name, value);
	if (!ret) {
		PyErr_SetString(PyExc_RuntimeError, "Unable to set parameter");
		return NULL;
        }

	Py_RETURN_NONE;
}

static PyObject *py_lp_ctx_private_path(py_talloc_Object *self, PyObject *args)
{
	char *name, *path;
	PyObject *ret;
	if (!PyArg_ParseTuple(args, "s", &name))
		return NULL;

	path = private_path(NULL, PyLoadparmContext_AsLoadparmContext(self), name);
	ret = PyString_FromString(path);
	talloc_free(path);

	return ret;
}

static PyObject *py_lp_ctx_services(py_talloc_Object *self)
{
	struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);
	PyObject *ret;
	int i;
	ret = PyList_New(lpcfg_numservices(lp_ctx));
	for (i = 0; i < lpcfg_numservices(lp_ctx); i++) {
		struct loadparm_service *service = lpcfg_servicebynum(lp_ctx, i);
		if (service != NULL) {
			PyList_SetItem(ret, i, PyString_FromString(lpcfg_servicename(service)));
		}
	}
	return ret;
}

static PyObject *py_lp_dump(PyObject *self, PyObject *args)
{
	PyObject *py_stream;
	bool show_defaults = false;
	FILE *f;
	struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);

	if (!PyArg_ParseTuple(args, "O|b", &py_stream, &show_defaults))
		return NULL;

	f = PyFile_AsFile(py_stream);
	if (f == NULL) {
		PyErr_SetString(PyExc_TypeError, "Not a file stream");
		return NULL;
	}

	lpcfg_dump(lp_ctx, f, show_defaults, lpcfg_numservices(lp_ctx));

	Py_RETURN_NONE;
}


static PyMethodDef py_lp_ctx_methods[] = {
	{ "load", (PyCFunction)py_lp_ctx_load, METH_VARARGS, 
		"S.load(filename) -> None\n"
		"Load specified file." },
	{ "load_default", (PyCFunction)py_lp_ctx_load_default, METH_NOARGS,
        	"S.load_default() -> None\n"
		"Load default smb.conf file." },
	{ "is_myname", (PyCFunction)py_lp_ctx_is_myname, METH_VARARGS,
		"S.is_myname(name) -> bool\n"
		"Check whether the specified name matches one of our netbios names." },
	{ "is_mydomain", (PyCFunction)py_lp_ctx_is_mydomain, METH_VARARGS,
		"S.is_mydomain(name) -> bool\n"
		"Check whether the specified name matches our domain name." },
	{ "get", (PyCFunction)py_lp_ctx_get, METH_VARARGS,
        	"S.get(name, service_name) -> value\n"
		"Find specified parameter." },
	{ "set", (PyCFunction)py_lp_ctx_set, METH_VARARGS,
		"S.set(name, value) -> bool\n"
		"Change a parameter." },
	{ "private_path", (PyCFunction)py_lp_ctx_private_path, METH_VARARGS,
		"S.private_path(name) -> path\n" },
	{ "services", (PyCFunction)py_lp_ctx_services, METH_NOARGS,
		"S.services() -> list" },
	{ "dump", (PyCFunction)py_lp_dump, METH_VARARGS, 
		"S.dump(stream, show_defaults=False)" },
	{ NULL }
};

static PyObject *py_lp_ctx_default_service(py_talloc_Object *self, void *closure)
{
	return PyLoadparmService_FromService(lpcfg_default_service(PyLoadparmContext_AsLoadparmContext(self)));
}

static PyObject *py_lp_ctx_config_file(py_talloc_Object *self, void *closure)
{
	const char *configfile = lpcfg_configfile(PyLoadparmContext_AsLoadparmContext(self));
	if (configfile == NULL)
		Py_RETURN_NONE;
	else
		return PyString_FromString(configfile);
}

static PyGetSetDef py_lp_ctx_getset[] = {
	{ discard_const_p(char, "default_service"), (getter)py_lp_ctx_default_service, NULL, NULL },
	{ discard_const_p(char, "configfile"), (getter)py_lp_ctx_config_file, NULL,
	  discard_const_p(char, "Name of last config file that was loaded.") },
	{ NULL }
};

static PyObject *py_lp_ctx_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
	py_talloc_Object *ret = (py_talloc_Object *)type->tp_alloc(type, 0);
	if (ret == NULL) {
		PyErr_NoMemory();
		return NULL;
	}
	ret->talloc_ctx = talloc_new(NULL);
	if (ret->talloc_ctx == NULL) {
		PyErr_NoMemory();
		return NULL;
	}
	ret->ptr = loadparm_init_global(false);
	return (PyObject *)ret;
}

static Py_ssize_t py_lp_ctx_len(py_talloc_Object *self)
{
	return lpcfg_numservices(PyLoadparmContext_AsLoadparmContext(self));
}

static PyObject *py_lp_ctx_getitem(py_talloc_Object *self, PyObject *name)
{
	struct loadparm_service *service;
	if (!PyString_Check(name)) {
		PyErr_SetString(PyExc_TypeError, "Only string subscripts are supported");
		return NULL;
	}
	service = lpcfg_service(PyLoadparmContext_AsLoadparmContext(self), PyString_AsString(name));
	if (service == NULL) {
		PyErr_SetString(PyExc_KeyError, "No such section");
		return NULL;
	}
	return PyLoadparmService_FromService(service);
}

static PyMappingMethods py_lp_ctx_mapping = {
	.mp_length = (lenfunc)py_lp_ctx_len,
	.mp_subscript = (binaryfunc)py_lp_ctx_getitem,
};

PyTypeObject PyLoadparmContext = {
	.tp_name = "LoadParm",
	.tp_basicsize = sizeof(py_talloc_Object),
	.tp_dealloc = py_talloc_dealloc,
	.tp_getset = py_lp_ctx_getset,
	.tp_methods = py_lp_ctx_methods,
	.tp_new = py_lp_ctx_new,
	.tp_as_mapping = &py_lp_ctx_mapping,
	.tp_flags = Py_TPFLAGS_DEFAULT,
};

static PyObject *py_lp_service_dump(PyObject *self, PyObject *args)
{
	PyObject *py_stream;
	bool show_defaults = false;
	FILE *f;
	struct loadparm_service *service = PyLoadparmService_AsLoadparmService(self);
	struct loadparm_service *default_service;
	PyObject *py_default_service;

	if (!PyArg_ParseTuple(args, "OO|b", &py_stream, &py_default_service,
						  &show_defaults))
		return NULL;

	f = PyFile_AsFile(py_stream);
	if (f == NULL) {
		PyErr_SetString(PyExc_TypeError, "Not a file stream");
		return NULL;
	}

	if (!PyObject_TypeCheck(py_default_service, &PyLoadparmService)) {
		PyErr_SetNone(PyExc_TypeError);
		return NULL;
	}

	default_service = PyLoadparmService_AsLoadparmService(py_default_service);

	lpcfg_dump_one(f, show_defaults, service, default_service);

	Py_RETURN_NONE;
}

static PyMethodDef py_lp_service_methods[] = {
	{ "dump", (PyCFunction)py_lp_service_dump, METH_VARARGS, 
		"S.dump(f, default_service, show_defaults=False)" },
	{ NULL }
};

PyTypeObject PyLoadparmService = {
	.tp_name = "LoadparmService",
	.tp_dealloc = py_talloc_dealloc,
	.tp_basicsize = sizeof(py_talloc_Object),
	.tp_methods = py_lp_service_methods,
	.tp_flags = Py_TPFLAGS_DEFAULT,
};

static PyObject *py_default_path(PyObject *self)
{
    return PyString_FromString(lp_default_path());
}

static PyMethodDef pyparam_methods[] = {
    { "default_path", (PyCFunction)py_default_path, METH_NOARGS, 
        "Returns the default smb.conf path." },
    { NULL }
};

void initparam(void)
{
	PyObject *m;

	if (PyType_Ready(&PyLoadparmContext) < 0)
		return;

	if (PyType_Ready(&PyLoadparmService) < 0)
		return;

	m = Py_InitModule3("param", pyparam_methods, "Parsing and writing Samba configuration files.");
	if (m == NULL)
		return;

	Py_INCREF(&PyLoadparmContext);
	PyModule_AddObject(m, "LoadParm", (PyObject *)&PyLoadparmContext);
}