source4/param/pyparam.c

   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 <Python.h>
  21 #include "includes.h"
  22 #include "param/param.h"
  23 #include "param/loadparm.h"
  24 #include <pytalloc.h>
  25 #include "dynconfig/dynconfig.h"
  26
  27 void initparam(void);
  28
  29 #define PyLoadparmContext_AsLoadparmContext(obj) pytalloc_get_type(obj, struct loadparm_context)
  30 #define PyLoadparmService_AsLoadparmService(obj) pytalloc_get_type(obj, struct loadparm_service)
  31
  32 extern PyTypeObject PyLoadparmContext;
  33 extern PyTypeObject PyLoadparmService;
  34
  35 static PyObject *PyLoadparmService_FromService(struct loadparm_service *service)
  36 {
  37         return pytalloc_reference(&PyLoadparmService, service);
  38 }
  39
  40 static PyObject *py_lp_ctx_get_helper(struct loadparm_context *lp_ctx, const char *service_name, const char *param_name)
  41 {
  42         struct parm_struct *parm = NULL;
  43         void *parm_ptr = NULL;
  44         int i;
  45
  46         if (service_name != NULL && strwicmp(service_name, GLOBAL_NAME) &&
  47                 strwicmp(service_name, GLOBAL_NAME2)) {
  48                 struct loadparm_service *service;
  49                 /* its a share parameter */
  50                 service = lpcfg_service(lp_ctx, service_name);
  51                 if (service == NULL) {
  52                         return NULL;
  53                 }
  54                 if (strchr(param_name, ':')) {
  55                         /* its a parametric option on a share */
  56                         const char *type = talloc_strndup(lp_ctx, param_name,
  57                                                                                           strcspn(param_name, ":"));
  58                         const char *option = strchr(param_name, ':') + 1;
  59                         const char *value;
  60                         if (type == NULL || option == NULL) {
  61                         return NULL;
  62                         }
  63                         value = lpcfg_get_parametric(lp_ctx, service, type, option);
  64                         if (value == NULL) {
  65                         return NULL;
  66                         }
  67                         return PyString_FromString(value);
  68                 }
  69
  70                 parm = lpcfg_parm_struct(lp_ctx, param_name);
  71                 if (parm == NULL || parm->p_class == P_GLOBAL) {
  72                         return NULL;
  73                 }
  74                 parm_ptr = lpcfg_parm_ptr(lp_ctx, service, parm);
  75     } else if (strchr(param_name, ':')) {
  76                 /* its a global parametric option */
  77                 const char *type = talloc_strndup(lp_ctx,
  78                                   param_name, strcspn(param_name, ":"));
  79                 const char *option = strchr(param_name, ':') + 1;
  80                 const char *value;
  81                 if (type == NULL || option == NULL) {
  82                         return NULL;
  83                 }
  84                 value = lpcfg_get_parametric(lp_ctx, NULL, type, option);
  85                 if (value == NULL)
  86                         return NULL;
  87                 return PyString_FromString(value);
  88         } else {
  89                 /* its a global parameter */
  90                 parm = lpcfg_parm_struct(lp_ctx, param_name);
  91                 if (parm == NULL) {
  92                         return NULL;
  93                 }
  94                 parm_ptr = lpcfg_parm_ptr(lp_ctx, NULL, parm);
  95         }
  96
  97         if (parm == NULL || parm_ptr == NULL) {
  98                 return NULL;
  99     }
 100
 101     /* construct and return the right type of python object */
 102     switch (parm->type) {
 103     case P_CHAR:
 104         return PyString_FromFormat("%c", *(char *)parm_ptr);
 105     case P_STRING:
 106     case P_USTRING:
 107         return PyString_FromString(*(char **)parm_ptr);
 108     case P_BOOL:
 109         return PyBool_FromLong(*(bool *)parm_ptr);
 110     case P_BOOLREV:
 111         return PyBool_FromLong(!(*(bool *)parm_ptr));
 112     case P_INTEGER:
 113     case P_OCTAL:
 114     case P_BYTES:
 115         return PyLong_FromLong(*(int *)parm_ptr);
 116     case P_ENUM:
 117         for (i=0; parm->enum_list[i].name; i++) {
 118             if (*(int *)parm_ptr == parm->enum_list[i].value) {
 119                 return PyString_FromString(parm->enum_list[i].name);
 120             }
 121         }
 122         return NULL;
 123     case P_CMDLIST:
 124     case P_LIST:
 125         {
 126             int j;
 127             const char **strlist = *(const char ***)parm_ptr;
 128             PyObject *pylist;
 129
 130                 if(strlist == NULL) {
 131                         return PyList_New(0);
 132                 }
 133
 134                 pylist = PyList_New(str_list_length(strlist));
 135             for (j = 0; strlist[j]; j++)
 136                 PyList_SetItem(pylist, j,
 137                                PyString_FromString(strlist[j]));
 138             return pylist;
 139         }
 140     }
 141     return NULL;
 142
 143 }
 144
 145 static PyObject *py_lp_ctx_load(pytalloc_Object *self, PyObject *args)
 146 {
 147         char *filename;
 148         bool ret;
 149         if (!PyArg_ParseTuple(args, "s", &filename))
 150                 return NULL;
 151
 152         ret = lpcfg_load(PyLoadparmContext_AsLoadparmContext(self), filename);
 153
 154         if (!ret) {
 155                 PyErr_Format(PyExc_RuntimeError, "Unable to load file %s", filename);
 156                 return NULL;
 157         }
 158         Py_RETURN_NONE;
 159 }
 160
 161 static PyObject *py_lp_ctx_load_default(pytalloc_Object *self)
 162 {
 163         bool ret;
 164         ret = lpcfg_load_default(PyLoadparmContext_AsLoadparmContext(self));
 165
 166         if (!ret) {
 167                 PyErr_SetString(PyExc_RuntimeError, "Unable to load default file");
 168                 return NULL;
 169         }
 170         Py_RETURN_NONE;
 171 }
 172
 173 static PyObject *py_lp_ctx_get(pytalloc_Object *self, PyObject *args)
 174 {
 175         char *param_name;
 176         char *section_name = NULL;
 177         PyObject *ret;
 178         if (!PyArg_ParseTuple(args, "s|z", &param_name, &section_name))
 179                 return NULL;
 180
 181         ret = py_lp_ctx_get_helper(PyLoadparmContext_AsLoadparmContext(self), section_name, param_name);
 182         if (ret == NULL)
 183                 Py_RETURN_NONE;
 184         return ret;
 185 }
 186
 187 static PyObject *py_lp_ctx_is_myname(pytalloc_Object *self, PyObject *args)
 188 {
 189         char *name;
 190         if (!PyArg_ParseTuple(args, "s", &name))
 191                 return NULL;
 192
 193         return PyBool_FromLong(lpcfg_is_myname(PyLoadparmContext_AsLoadparmContext(self), name));
 194 }
 195
 196 static PyObject *py_lp_ctx_is_mydomain(pytalloc_Object *self, PyObject *args)
 197 {
 198         char *name;
 199         if (!PyArg_ParseTuple(args, "s", &name))
 200                 return NULL;
 201
 202         return PyBool_FromLong(lpcfg_is_mydomain(PyLoadparmContext_AsLoadparmContext(self), name));
 203 }
 204
 205 static PyObject *py_lp_ctx_set(pytalloc_Object *self, PyObject *args)
 206 {
 207         char *name, *value;
 208         bool ret;
 209         if (!PyArg_ParseTuple(args, "ss", &name, &value))
 210                 return NULL;
 211
 212         ret = lpcfg_set_cmdline(PyLoadparmContext_AsLoadparmContext(self), name, value);
 213         if (!ret) {
 214                 PyErr_SetString(PyExc_RuntimeError, "Unable to set parameter");
 215                 return NULL;
 216         }
 217
 218         Py_RETURN_NONE;
 219 }
 220
 221 static PyObject *py_lp_ctx_private_path(pytalloc_Object *self, PyObject *args)
 222 {
 223         char *name, *path;
 224         PyObject *ret;
 225         if (!PyArg_ParseTuple(args, "s", &name))
 226                 return NULL;
 227
 228         path = lpcfg_private_path(NULL, PyLoadparmContext_AsLoadparmContext(self), name);
 229         ret = PyString_FromString(path);
 230         talloc_free(path);
 231
 232         return ret;
 233 }
 234
 235 static PyObject *py_lp_ctx_services(pytalloc_Object *self)
 236 {
 237         struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);
 238         PyObject *ret;
 239         int i;
 240         ret = PyList_New(lpcfg_numservices(lp_ctx));
 241         for (i = 0; i < lpcfg_numservices(lp_ctx); i++) {
 242                 struct loadparm_service *service = lpcfg_servicebynum(lp_ctx, i);
 243                 if (service != NULL) {
 244                         PyList_SetItem(ret, i, PyString_FromString(lpcfg_servicename(service)));
 245                 }
 246         }
 247         return ret;
 248 }
 249
 250 static PyObject *py_lp_ctx_server_role(pytalloc_Object *self)
 251 {
 252         struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);
 253         uint32_t role;
 254         const char *role_str;
 255
 256         role = lpcfg_server_role(lp_ctx);
 257         role_str = server_role_str(role);
 258
 259         return PyString_FromString(role_str);
 260 }
 261
 262 static PyObject *py_lp_dump(PyObject *self, PyObject *args)
 263 {
 264         PyObject *py_stream;
 265         bool show_defaults = false;
 266         FILE *f;
 267         struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);
 268
 269         if (!PyArg_ParseTuple(args, "O|b", &py_stream, &show_defaults))
 270                 return NULL;
 271
 272         f = PyFile_AsFile(py_stream);
 273         if (f == NULL) {
 274                 return NULL;
 275         }
 276
 277         lpcfg_dump(lp_ctx, f, show_defaults, lpcfg_numservices(lp_ctx));
 278
 279         Py_RETURN_NONE;
 280 }
 281
 282 static PyObject *py_lp_dump_a_parameter(PyObject *self, PyObject *args)
 283 {
 284         PyObject *py_stream;
 285         char *param_name;
 286         const char *section_name = NULL;
 287         FILE *f;
 288         struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);
 289         struct loadparm_service *service;
 290         bool ret;
 291
 292         if (!PyArg_ParseTuple(args, "Os|z", &py_stream, &param_name, &section_name))
 293                 return NULL;
 294
 295         f = PyFile_AsFile(py_stream);
 296         if (f == NULL) {
 297                 return NULL;
 298         }
 299
 300         if (section_name != NULL && strwicmp(section_name, GLOBAL_NAME) &&
 301                 strwicmp(section_name, GLOBAL_NAME2)) {
 302                 /* it's a share parameter */
 303                 service = lpcfg_service(lp_ctx, section_name);
 304                 if (service == NULL) {
 305                         PyErr_Format(PyExc_RuntimeError, "Unknown section %s", section_name);
 306                         return NULL;
 307                 }
 308         } else {
 309                 /* it's global */
 310                 service = NULL;
 311                 section_name = "global";
 312         }
 313
 314         ret = lpcfg_dump_a_parameter(lp_ctx, service, param_name, f);
 315
 316         if (!ret) {
 317                 PyErr_Format(PyExc_RuntimeError, "Parameter %s unknown for section %s", param_name, section_name);
 318                 return NULL;
 319         }
 320
 321         Py_RETURN_NONE;
 322
 323 }
 324
 325 static PyObject *py_samdb_url(PyObject *self)
 326 {
 327         struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self);
 328         return PyString_FromFormat("tdb://%s/sam.ldb", lpcfg_private_dir(lp_ctx));
 329 }
 330
 331
 332 static PyMethodDef py_lp_ctx_methods[] = {
 333         { "load", (PyCFunction)py_lp_ctx_load, METH_VARARGS,
 334                 "S.load(filename) -> None\n"
 335                 "Load specified file." },
 336         { "load_default", (PyCFunction)py_lp_ctx_load_default, METH_NOARGS,
 337                 "S.load_default() -> None\n"
 338                 "Load default smb.conf file." },
 339         { "is_myname", (PyCFunction)py_lp_ctx_is_myname, METH_VARARGS,
 340                 "S.is_myname(name) -> bool\n"
 341                 "Check whether the specified name matches one of our netbios names." },
 342         { "is_mydomain", (PyCFunction)py_lp_ctx_is_mydomain, METH_VARARGS,
 343                 "S.is_mydomain(name) -> bool\n"
 344                 "Check whether the specified name matches our domain name." },
 345         { "get", (PyCFunction)py_lp_ctx_get, METH_VARARGS,
 346                 "S.get(name, service_name) -> value\n"
 347                 "Find specified parameter." },
 348         { "set", (PyCFunction)py_lp_ctx_set, METH_VARARGS,
 349                 "S.set(name, value) -> bool\n"
 350                 "Change a parameter." },
 351         { "private_path", (PyCFunction)py_lp_ctx_private_path, METH_VARARGS,
 352                 "S.private_path(name) -> path\n" },
 353         { "services", (PyCFunction)py_lp_ctx_services, METH_NOARGS,
 354                 "S.services() -> list" },
 355         { "server_role", (PyCFunction)py_lp_ctx_server_role, METH_NOARGS,
 356                 "S.server_role() -> value\n"
 357                 "Get the server role." },
 358         { "dump", (PyCFunction)py_lp_dump, METH_VARARGS,
 359                 "S.dump(stream, show_defaults=False)" },
 360         { "dump_a_parameter", (PyCFunction)py_lp_dump_a_parameter, METH_VARARGS,
 361                 "S.dump_a_parameter(stream, name, service_name)" },
 362         { "samdb_url", (PyCFunction)py_samdb_url, METH_NOARGS,
 363                 "S.samdb_url() -> string\n"
 364                 "Returns the current URL for sam.ldb." },
 365         { NULL }
 366 };
 367
 368 static PyObject *py_lp_ctx_default_service(pytalloc_Object *self, void *closure)
 369 {
 370         return PyLoadparmService_FromService(lpcfg_default_service(PyLoadparmContext_AsLoadparmContext(self)));
 371 }
 372
 373 static PyObject *py_lp_ctx_config_file(pytalloc_Object *self, void *closure)
 374 {
 375         const char *configfile = lpcfg_configfile(PyLoadparmContext_AsLoadparmContext(self));
 376         if (configfile == NULL)
 377                 Py_RETURN_NONE;
 378         else
 379                 return PyString_FromString(configfile);
 380 }
 381
 382 static PyGetSetDef py_lp_ctx_getset[] = {
 383         { discard_const_p(char, "default_service"), (getter)py_lp_ctx_default_service, NULL, NULL },
 384         { discard_const_p(char, "configfile"), (getter)py_lp_ctx_config_file, NULL,
 385           discard_const_p(char, "Name of last config file that was loaded.") },
 386         { NULL }
 387 };
 388
 389 static PyObject *py_lp_ctx_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 390 {
 391         pytalloc_Object *ret = (pytalloc_Object *)type->tp_alloc(type, 0);
 392         if (ret == NULL) {
 393                 PyErr_NoMemory();
 394                 return NULL;
 395         }
 396         ret->talloc_ctx = talloc_new(NULL);
 397         if (ret->talloc_ctx == NULL) {
 398                 PyErr_NoMemory();
 399                 return NULL;
 400         }
 401         ret->ptr = loadparm_init_global(false);
 402         if (ret->ptr == NULL) {
 403                 PyErr_NoMemory();
 404                 return NULL;
 405         }
 406         return (PyObject *)ret;
 407 }
 408
 409 static Py_ssize_t py_lp_ctx_len(pytalloc_Object *self)
 410 {
 411         return lpcfg_numservices(PyLoadparmContext_AsLoadparmContext(self));
 412 }
 413
 414 static PyObject *py_lp_ctx_getitem(pytalloc_Object *self, PyObject *name)
 415 {
 416         struct loadparm_service *service;
 417         if (!PyString_Check(name)) {
 418                 PyErr_SetString(PyExc_TypeError, "Only string subscripts are supported");
 419                 return NULL;
 420         }
 421         service = lpcfg_service(PyLoadparmContext_AsLoadparmContext(self), PyString_AsString(name));
 422         if (service == NULL) {
 423                 PyErr_SetString(PyExc_KeyError, "No such section");
 424                 return NULL;
 425         }
 426         return PyLoadparmService_FromService(service);
 427 }
 428
 429 static PyMappingMethods py_lp_ctx_mapping = {
 430         .mp_length = (lenfunc)py_lp_ctx_len,
 431         .mp_subscript = (binaryfunc)py_lp_ctx_getitem,
 432 };
 433
 434 PyTypeObject PyLoadparmContext = {
 435         .tp_name = "param.LoadParm",
 436         .tp_basicsize = sizeof(pytalloc_Object),
 437         .tp_getset = py_lp_ctx_getset,
 438         .tp_methods = py_lp_ctx_methods,
 439         .tp_new = py_lp_ctx_new,
 440         .tp_as_mapping = &py_lp_ctx_mapping,
 441         .tp_flags = Py_TPFLAGS_DEFAULT,
 442 };
 443
 444 static PyObject *py_lp_service_dump(PyObject *self, PyObject *args)
 445 {
 446         PyObject *py_stream;
 447         bool show_defaults = false;
 448         FILE *f;
 449         struct loadparm_service *service = PyLoadparmService_AsLoadparmService(self);
 450         struct loadparm_service *default_service;
 451         PyObject *py_default_service;
 452
 453         if (!PyArg_ParseTuple(args, "OO|b", &py_stream, &py_default_service,
 454                                                   &show_defaults))
 455                 return NULL;
 456
 457         f = PyFile_AsFile(py_stream);
 458         if (f == NULL) {
 459                 return NULL;
 460         }
 461
 462         if (!PyObject_TypeCheck(py_default_service, &PyLoadparmService)) {
 463                 PyErr_SetNone(PyExc_TypeError);
 464                 return NULL;
 465         }
 466
 467         default_service = PyLoadparmService_AsLoadparmService(py_default_service);
 468
 469         lpcfg_dump_one(f, show_defaults, service, default_service);
 470
 471         Py_RETURN_NONE;
 472 }
 473
 474 static PyMethodDef py_lp_service_methods[] = {
 475         { "dump", (PyCFunction)py_lp_service_dump, METH_VARARGS,
 476                 "S.dump(f, default_service, show_defaults=False)" },
 477         { NULL }
 478 };
 479
 480 PyTypeObject PyLoadparmService = {
 481         .tp_name = "param.LoadparmService",
 482         .tp_basicsize = sizeof(pytalloc_Object),
 483         .tp_methods = py_lp_service_methods,
 484         .tp_flags = Py_TPFLAGS_DEFAULT,
 485 };
 486
 487 static PyObject *py_default_path(PyObject *self)
 488 {
 489         return PyString_FromString(lp_default_path());
 490 }
 491
 492 static PyObject *py_setup_dir(PyObject *self)
 493 {
 494         return PyString_FromString(dyn_SETUPDIR);
 495 }
 496
 497 static PyObject *py_modules_dir(PyObject *self)
 498 {
 499         return PyString_FromString(dyn_MODULESDIR);
 500 }
 501
 502 static PyObject *py_bin_dir(PyObject *self)
 503 {
 504         return PyString_FromString(dyn_BINDIR);
 505 }
 506
 507 static PyObject *py_sbin_dir(PyObject *self)
 508 {
 509         return PyString_FromString(dyn_SBINDIR);
 510 }
 511
 512 static PyMethodDef pyparam_methods[] = {
 513         { "default_path", (PyCFunction)py_default_path, METH_NOARGS,
 514                 "Returns the default smb.conf path." },
 515         { "setup_dir", (PyCFunction)py_setup_dir, METH_NOARGS,
 516                 "Returns the compiled in location of provision tempates." },
 517         { "modules_dir", (PyCFunction)py_modules_dir, METH_NOARGS,
 518                 "Returns the compiled in location of modules." },
 519         { "bin_dir", (PyCFunction)py_bin_dir, METH_NOARGS,
 520                 "Returns the compiled in BINDIR." },
 521         { "sbin_dir", (PyCFunction)py_sbin_dir, METH_NOARGS,
 522                 "Returns the compiled in SBINDIR." },
 523         { NULL }
 524 };
 525
 526 void initparam(void)
 527 {
 528         PyObject *m;
 529         PyTypeObject *talloc_type = pytalloc_GetObjectType();
 530         if (talloc_type == NULL)
 531                 return;
 532
 533         PyLoadparmContext.tp_base = talloc_type;
 534         PyLoadparmService.tp_base = talloc_type;
 535
 536         if (PyType_Ready(&PyLoadparmContext) < 0)
 537                 return;
 538
 539         if (PyType_Ready(&PyLoadparmService) < 0)
 540                 return;
 541
 542         m = Py_InitModule3("param", pyparam_methods, "Parsing and writing Samba configuration files.");
 543         if (m == NULL)
 544                 return;
 545
 546         Py_INCREF(&PyLoadparmContext);
 547         PyModule_AddObject(m, "LoadParm", (PyObject *)&PyLoadparmContext);
 548 }