1/* 2 Unix SMB/CIFS implementation. 3 Samba utility functions 4 Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. 18*/ 19 20#include <stdint.h> 21#include <stdbool.h> 22 23#include "includes.h" 24#include "param/param.h" 25#include "param/loadparm.h" 26#include <Python.h> 27#include "pytalloc.h" 28 29/* There's no Py_ssize_t in 2.4, apparently */ 30#if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION < 5 31typedef int Py_ssize_t; 32typedef inquiry lenfunc; 33#endif 34 35#ifndef Py_RETURN_NONE 36#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None 37#endif 38 39#define PyLoadparmContext_AsLoadparmContext(obj) py_talloc_get_type(obj, struct loadparm_context) 40 41PyAPI_DATA(PyTypeObject) PyLoadparmContext; 42PyAPI_DATA(PyTypeObject) PyLoadparmService; 43 44PyObject *PyLoadparmService_FromService(struct loadparm_service *service) 45{ 46 return py_talloc_reference(&PyLoadparmService, service); 47} 48 49static PyObject *py_lp_ctx_get_helper(struct loadparm_context *lp_ctx, const char *service_name, const char *param_name) 50{ 51 struct parm_struct *parm = NULL; 52 void *parm_ptr = NULL; 53 int i; 54 55 if (service_name != NULL) { 56 struct loadparm_service *service; 57 /* its a share parameter */ 58 service = lp_service(lp_ctx, service_name); 59 if (service == NULL) { 60 return NULL; 61 } 62 if (strchr(param_name, ':')) { 63 /* its a parametric option on a share */ 64 const char *type = talloc_strndup(lp_ctx, 65 param_name, 66 strcspn(param_name, ":")); 67 const char *option = strchr(param_name, ':') + 1; 68 const char *value; 69 if (type == NULL || option == NULL) { 70 return NULL; 71 } 72 value = lp_get_parametric(lp_ctx, service, type, option); 73 if (value == NULL) { 74 return NULL; 75 } 76 return PyString_FromString(value); 77 } 78 79 parm = lp_parm_struct(param_name); 80 if (parm == NULL || parm->pclass == P_GLOBAL) { 81 return NULL; 82 } 83 parm_ptr = lp_parm_ptr(lp_ctx, service, parm); 84 } else if (strchr(param_name, ':')) { 85 /* its a global parametric option */ 86 const char *type = talloc_strndup(lp_ctx, 87 param_name, strcspn(param_name, ":")); 88 const char *option = strchr(param_name, ':') + 1; 89 const char *value; 90 if (type == NULL || option == NULL) { 91 return NULL; 92 } 93 value = lp_get_parametric(lp_ctx, NULL, type, option); 94 if (value == NULL) 95 return NULL; 96 return PyString_FromString(value); 97 } else { 98 /* its a global parameter */ 99 parm = lp_parm_struct(param_name); 100 if (parm == NULL) { 101 return NULL; 102 } 103 parm_ptr = lp_parm_ptr(lp_ctx, NULL, parm); 104 } 105 106 if (parm == NULL || parm_ptr == NULL) { 107 return NULL; 108 } 109 110 /* construct and return the right type of python object */ 111 switch (parm->type) { 112 case P_STRING: 113 case P_USTRING: 114 return PyString_FromString(*(char **)parm_ptr); 115 case P_BOOL: 116 return PyBool_FromLong(*(bool *)parm_ptr); 117 case P_INTEGER: 118 case P_OCTAL: 119 case P_BYTES: 120 return PyLong_FromLong(*(int *)parm_ptr); 121 case P_ENUM: 122 for (i=0; parm->enum_list[i].name; i++) { 123 if (*(int *)parm_ptr == parm->enum_list[i].value) { 124 return PyString_FromString(parm->enum_list[i].name); 125 } 126 } 127 return NULL; 128 case P_LIST: 129 { 130 int j; 131 const char **strlist = *(const char ***)parm_ptr; 132 PyObject *pylist; 133 134 if(strlist == NULL) { 135 return PyList_New(0); 136 } 137 138 pylist = PyList_New(str_list_length(strlist)); 139 for (j = 0; strlist[j]; j++) 140 PyList_SetItem(pylist, j, 141 PyString_FromString(strlist[j])); 142 return pylist; 143 } 144 145 break; 146 } 147 return NULL; 148 149} 150 151static PyObject *py_lp_ctx_load(py_talloc_Object *self, PyObject *args) 152{ 153 char *filename; 154 bool ret; 155 if (!PyArg_ParseTuple(args, "s", &filename)) 156 return NULL; 157 158 ret = lp_load(PyLoadparmContext_AsLoadparmContext(self), filename); 159 160 if (!ret) { 161 PyErr_Format(PyExc_RuntimeError, "Unable to load file %s", filename); 162 return NULL; 163 } 164 Py_RETURN_NONE; 165} 166 167static PyObject *py_lp_ctx_load_default(py_talloc_Object *self) 168{ 169 bool ret; 170 ret = lp_load_default(PyLoadparmContext_AsLoadparmContext(self)); 171 172 if (!ret) { 173 PyErr_SetString(PyExc_RuntimeError, "Unable to load default file"); 174 return NULL; 175 } 176 Py_RETURN_NONE; 177} 178 179static PyObject *py_lp_ctx_get(py_talloc_Object *self, PyObject *args) 180{ 181 char *param_name; 182 char *section_name = NULL; 183 PyObject *ret; 184 if (!PyArg_ParseTuple(args, "s|s", ¶m_name, §ion_name)) 185 return NULL; 186 187 ret = py_lp_ctx_get_helper(PyLoadparmContext_AsLoadparmContext(self), section_name, param_name); 188 if (ret == NULL) 189 Py_RETURN_NONE; 190 return ret; 191} 192 193static PyObject *py_lp_ctx_is_myname(py_talloc_Object *self, PyObject *args) 194{ 195 char *name; 196 if (!PyArg_ParseTuple(args, "s", &name)) 197 return NULL; 198 199 return PyBool_FromLong(lp_is_myname(PyLoadparmContext_AsLoadparmContext(self), name)); 200} 201 202static PyObject *py_lp_ctx_is_mydomain(py_talloc_Object *self, PyObject *args) 203{ 204 char *name; 205 if (!PyArg_ParseTuple(args, "s", &name)) 206 return NULL; 207 208 return PyBool_FromLong(lp_is_mydomain(PyLoadparmContext_AsLoadparmContext(self), name)); 209} 210 211static PyObject *py_lp_ctx_set(py_talloc_Object *self, PyObject *args) 212{ 213 char *name, *value; 214 bool ret; 215 if (!PyArg_ParseTuple(args, "ss", &name, &value)) 216 return NULL; 217 218 ret = lp_set_cmdline(PyLoadparmContext_AsLoadparmContext(self), name, value); 219 if (!ret) { 220 PyErr_SetString(PyExc_RuntimeError, "Unable to set parameter"); 221 return NULL; 222 } 223 224 Py_RETURN_NONE; 225} 226 227static PyObject *py_lp_ctx_private_path(py_talloc_Object *self, PyObject *args) 228{ 229 char *name, *path; 230 PyObject *ret; 231 if (!PyArg_ParseTuple(args, "s", &name)) 232 return NULL; 233 234 path = private_path(NULL, PyLoadparmContext_AsLoadparmContext(self), name); 235 ret = PyString_FromString(path); 236 talloc_free(path); 237 238 return ret; 239} 240 241static PyObject *py_lp_ctx_services(py_talloc_Object *self) 242{ 243 struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); 244 PyObject *ret; 245 int i; 246 ret = PyList_New(lp_numservices(lp_ctx)); 247 for (i = 0; i < lp_numservices(lp_ctx); i++) { 248 struct loadparm_service *service = lp_servicebynum(lp_ctx, i); 249 if (service != NULL) { 250 PyList_SetItem(ret, i, PyString_FromString(lp_servicename(service))); 251 } 252 } 253 return ret; 254} 255 256static PyMethodDef py_lp_ctx_methods[] = { 257 { "load", (PyCFunction)py_lp_ctx_load, METH_VARARGS, 258 "S.load(filename) -> None\n" 259 "Load specified file." }, 260 { "load_default", (PyCFunction)py_lp_ctx_load_default, METH_NOARGS, 261 "S.load_default() -> None\n" 262 "Load default smb.conf file." }, 263 { "is_myname", (PyCFunction)py_lp_ctx_is_myname, METH_VARARGS, 264 "S.is_myname(name) -> bool\n" 265 "Check whether the specified name matches one of our netbios names." }, 266 { "is_mydomain", (PyCFunction)py_lp_ctx_is_mydomain, METH_VARARGS, 267 "S.is_mydomain(name) -> bool\n" 268 "Check whether the specified name matches our domain name." }, 269 { "get", (PyCFunction)py_lp_ctx_get, METH_VARARGS, 270 "S.get(name, service_name) -> value\n" 271 "Find specified parameter." }, 272 { "set", (PyCFunction)py_lp_ctx_set, METH_VARARGS, 273 "S.set(name, value) -> bool\n" 274 "Change a parameter." }, 275 { "private_path", (PyCFunction)py_lp_ctx_private_path, METH_VARARGS, 276 "S.private_path(name) -> path\n" }, 277 { "services", (PyCFunction)py_lp_ctx_services, METH_NOARGS, 278 "S.services() -> list" }, 279 { NULL } 280}; 281 282static PyObject *py_lp_ctx_default_service(py_talloc_Object *self, void *closure) 283{ 284 return PyLoadparmService_FromService(lp_default_service(PyLoadparmContext_AsLoadparmContext(self))); 285} 286 287static PyObject *py_lp_ctx_config_file(py_talloc_Object *self, void *closure) 288{ 289 const char *configfile = lp_configfile(PyLoadparmContext_AsLoadparmContext(self)); 290 if (configfile == NULL) 291 Py_RETURN_NONE; 292 else 293 return PyString_FromString(configfile); 294} 295 296static PyGetSetDef py_lp_ctx_getset[] = { 297 { discard_const_p(char, "default_service"), (getter)py_lp_ctx_default_service, NULL, NULL }, 298 { discard_const_p(char, "configfile"), (getter)py_lp_ctx_config_file, NULL, 299 discard_const_p(char, "Name of last config file that was loaded.") }, 300 { NULL } 301}; 302 303static PyObject *py_lp_ctx_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) 304{ 305 py_talloc_Object *ret = (py_talloc_Object *)type->tp_alloc(type, 0); 306 if (ret == NULL) { 307 PyErr_NoMemory(); 308 return NULL; 309 } 310 ret->talloc_ctx = talloc_new(NULL); 311 if (ret->talloc_ctx == NULL) { 312 PyErr_NoMemory(); 313 return NULL; 314 } 315 ret->ptr = loadparm_init(ret->talloc_ctx); 316 return (PyObject *)ret; 317} 318 319static Py_ssize_t py_lp_ctx_len(py_talloc_Object *self) 320{ 321 return lp_numservices(PyLoadparmContext_AsLoadparmContext(self)); 322} 323 324static PyObject *py_lp_ctx_getitem(py_talloc_Object *self, PyObject *name) 325{ 326 struct loadparm_service *service; 327 if (!PyString_Check(name)) { 328 PyErr_SetString(PyExc_TypeError, "Only string subscripts are supported"); 329 return NULL; 330 } 331 service = lp_service(PyLoadparmContext_AsLoadparmContext(self), PyString_AsString(name)); 332 if (service == NULL) { 333 PyErr_SetString(PyExc_KeyError, "No such section"); 334 return NULL; 335 } 336 return PyLoadparmService_FromService(service); 337} 338 339static PyMappingMethods py_lp_ctx_mapping = { 340 .mp_length = (lenfunc)py_lp_ctx_len, 341 .mp_subscript = (binaryfunc)py_lp_ctx_getitem, 342}; 343 344PyTypeObject PyLoadparmContext = { 345 .tp_name = "LoadParm", 346 .tp_basicsize = sizeof(py_talloc_Object), 347 .tp_dealloc = py_talloc_dealloc, 348 .tp_getset = py_lp_ctx_getset, 349 .tp_methods = py_lp_ctx_methods, 350 .tp_new = py_lp_ctx_new, 351 .tp_as_mapping = &py_lp_ctx_mapping, 352 .tp_flags = Py_TPFLAGS_DEFAULT, 353}; 354 355PyTypeObject PyLoadparmService = { 356 .tp_name = "LoadparmService", 357 .tp_dealloc = py_talloc_dealloc, 358 .tp_basicsize = sizeof(py_talloc_Object), 359 .tp_flags = Py_TPFLAGS_DEFAULT, 360}; 361 362static PyObject *py_default_path(PyObject *self) 363{ 364 return PyString_FromString(lp_default_path()); 365} 366 367static PyMethodDef pyparam_methods[] = { 368 { "default_path", (PyCFunction)py_default_path, METH_NOARGS, 369 "Returns the default smb.conf path." }, 370 { NULL } 371}; 372 373void initparam(void) 374{ 375 PyObject *m; 376 377 if (PyType_Ready(&PyLoadparmContext) < 0) 378 return; 379 380 m = Py_InitModule3("param", pyparam_methods, "Parsing and writing Samba configuration files."); 381 if (m == NULL) 382 return; 383 384 Py_INCREF(&PyLoadparmContext); 385 PyModule_AddObject(m, "LoadParm", (PyObject *)&PyLoadparmContext); 386} 387