diff options
Diffstat (limited to 'source4/param/pyparam.c')
| -rw-r--r-- | source4/param/pyparam.c | 746 |
1 files changed, 746 insertions, 0 deletions
diff --git a/source4/param/pyparam.c b/source4/param/pyparam.c new file mode 100644 index 0000000..8f28083 --- /dev/null +++ b/source4/param/pyparam.c @@ -0,0 +1,746 @@ +/* + 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 "python/py3compat.h" +#include "includes.h" +#include "param/param.h" +#include "param/loadparm.h" +#include <pytalloc.h> +#include "dynconfig/dynconfig.h" + +#define PyLoadparmContext_AsLoadparmContext(obj) pytalloc_get_type(obj, struct loadparm_context) +#define PyLoadparmService_AsLoadparmService(obj) pytalloc_get_type(obj, struct loadparm_service) + +extern PyTypeObject PyLoadparmContext; +extern PyTypeObject PyLoadparmService; + +static PyObject *PyLoadparmService_FromService(struct loadparm_service *service) +{ + return pytalloc_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 PyUnicode_FromString(value); + } + + parm = lpcfg_parm_struct(lp_ctx, param_name); + if (parm == NULL || parm->p_class == 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 PyUnicode_FromString(value); + } else { + /* its a global parameter */ + parm = lpcfg_parm_struct(lp_ctx, 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_CHAR: + return PyUnicode_FromFormat("%c", *(char *)parm_ptr); + case P_STRING: + case P_USTRING: + return PyUnicode_FromString(*(char **)parm_ptr); + case P_BOOL: + return PyBool_FromLong(*(bool *)parm_ptr); + case P_BOOLREV: + 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 PyUnicode_FromString(parm->enum_list[i].name); + } + } + return NULL; + case P_CMDLIST: + 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, + PyUnicode_FromString(strlist[j])); + return pylist; + } + } + return NULL; + +} + +static PyObject *py_lp_ctx_load(PyObject *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(PyObject *self, PyObject *unused) +{ + 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(PyObject *self, PyObject *args) +{ + char *param_name; + char *section_name = NULL; + PyObject *ret; + if (!PyArg_ParseTuple(args, "s|z", ¶m_name, §ion_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(PyObject *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(PyObject *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(PyObject *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(PyObject *self, PyObject *args) +{ + char *name, *path; + PyObject *ret; + if (!PyArg_ParseTuple(args, "s", &name)) + return NULL; + + path = lpcfg_private_path(NULL, PyLoadparmContext_AsLoadparmContext(self), name); + ret = PyUnicode_FromString(path); + talloc_free(path); + + return ret; +} + +static PyObject *py_lp_ctx_services(PyObject *self, PyObject *unused) +{ + 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, PyUnicode_FromString(lpcfg_servicename(service))); + } + } + return ret; +} + +static PyObject *py_lp_ctx_server_role(PyObject *self, PyObject *unused) +{ + struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); + uint32_t role; + const char *role_str; + + role = lpcfg_server_role(lp_ctx); + role_str = server_role_str(role); + + return PyUnicode_FromString(role_str); +} + +static PyObject *py_lp_dump(PyObject *self, PyObject *args) +{ + bool show_defaults = false; + const char *file_name = ""; + const char *mode = "w"; + FILE *f; + struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); + + if (!PyArg_ParseTuple(args, "|bss", &show_defaults, &file_name, &mode)) + return NULL; + + if (file_name[0] == '\0') { + f = stdout; + } else { + f = fopen(file_name, mode); + } + + if (f == NULL) { + PyErr_SetFromErrno(PyExc_IOError); + return NULL; + } + + lpcfg_dump(lp_ctx, f, show_defaults, lpcfg_numservices(lp_ctx)); + + if (f != stdout) { + fclose(f); + } + + Py_RETURN_NONE; +} + +static PyObject *py_lp_dump_globals(PyObject *self, PyObject *args) +{ + bool show_defaults = false; + const char *file_name = ""; + const char *mode = "w"; + FILE *f; + struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); + + if (!PyArg_ParseTuple(args, "|bss", &show_defaults, &file_name, &mode)) + return NULL; + + if (file_name[0] == '\0') { + f = stdout; + } else { + f = fopen(file_name, mode); + } + + if (f == NULL) { + PyErr_SetFromErrno(PyExc_IOError); + return NULL; + } + + lpcfg_dump_globals(lp_ctx, f, show_defaults); + + if (f != stdout) { + fclose(f); + } + + Py_RETURN_NONE; +} + +static PyObject *py_lp_dump_a_parameter(PyObject *self, PyObject *args) +{ + char *param_name; + const char *section_name = NULL; + const char *file_name = ""; + const char *mode = "w"; + FILE *f; + struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); + struct loadparm_service *service; + bool ret; + + if (!PyArg_ParseTuple(args, "s|zss", ¶m_name, §ion_name, &file_name, &mode)) + return NULL; + + if (file_name[0] == '\0') { + f = stdout; + } else { + f = fopen(file_name, mode); + } + + if (f == NULL) { + return NULL; + } + + if (section_name != NULL && strwicmp(section_name, GLOBAL_NAME) && + strwicmp(section_name, GLOBAL_NAME2)) { + /* it's a share parameter */ + service = lpcfg_service(lp_ctx, section_name); + if (service == NULL) { + PyErr_Format(PyExc_RuntimeError, "Unknown section %s", section_name); + return NULL; + } + } else { + /* it's global */ + service = NULL; + section_name = "global"; + } + + ret = lpcfg_dump_a_parameter(lp_ctx, service, param_name, f); + + if (!ret) { + PyErr_Format(PyExc_RuntimeError, "Parameter %s unknown for section %s", param_name, section_name); + if (f != stdout) { + fclose(f); + } + return NULL; + } + + if (f != stdout) { + fclose(f); + } + + Py_RETURN_NONE; + +} + +static PyObject *py_lp_log_level(PyObject *self, PyObject *unused) +{ + int ret = debuglevel_get(); + return PyLong_FromLong(ret); +} + + +static PyObject *py_samdb_url(PyObject *self, PyObject *unused) +{ + struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); + return PyUnicode_FromFormat("tdb://%s/sam.ldb", lpcfg_private_dir(lp_ctx)); +} + +static PyObject *py_cache_path(PyObject *self, PyObject *args) +{ + struct loadparm_context *lp_ctx = PyLoadparmContext_AsLoadparmContext(self); + char *name = NULL; + char *path = NULL; + PyObject *ret = NULL; + + if (!PyArg_ParseTuple(args, "s", &name)) { + return NULL; + } + + path = lpcfg_cache_path(NULL, lp_ctx, name); + if (!path) { + PyErr_Format(PyExc_RuntimeError, + "Unable to access cache %s", name); + return NULL; + } + ret = PyUnicode_FromString(path); + talloc_free(path); + + return ret; +} + +static PyObject *py_state_path(PyObject *self, PyObject *args) +{ + struct loadparm_context *lp_ctx = + PyLoadparmContext_AsLoadparmContext(self); + char *name = NULL; + char *path = NULL; + PyObject *ret = NULL; + + if (!PyArg_ParseTuple(args, "s", &name)) { + return NULL; + } + + path = lpcfg_state_path(NULL, lp_ctx, name); + if (!path) { + PyErr_Format(PyExc_RuntimeError, + "Unable to access cache %s", name); + return NULL; + } + ret = PyUnicode_FromString(path); + talloc_free(path); + + return ret; +} + +static PyMethodDef py_lp_ctx_methods[] = { + { "load", py_lp_ctx_load, METH_VARARGS, + "S.load(filename) -> None\n" + "Load specified file." }, + { "load_default", py_lp_ctx_load_default, METH_NOARGS, + "S.load_default() -> None\n" + "Load default smb.conf file." }, + { "is_myname", 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", py_lp_ctx_is_mydomain, METH_VARARGS, + "S.is_mydomain(name) -> bool\n" + "Check whether the specified name matches our domain name." }, + { "get", py_lp_ctx_get, METH_VARARGS, + "S.get(name, service_name) -> value\n" + "Find specified parameter." }, + { "set", py_lp_ctx_set, METH_VARARGS, + "S.set(name, value) -> bool\n" + "Change a parameter." }, + { "private_path", py_lp_ctx_private_path, METH_VARARGS, + "S.private_path(name) -> path\n" }, + { "services", py_lp_ctx_services, METH_NOARGS, + "S.services() -> list" }, + { "server_role", py_lp_ctx_server_role, METH_NOARGS, + "S.server_role() -> value\n" + "Get the server role." }, + { "dump", py_lp_dump, METH_VARARGS, + "S.dump(show_defaults=False, file_name='', mode='w')" }, + { "dump_globals", py_lp_dump_globals, METH_VARARGS, + "S.dump_globals(show_defaults=False, file_name='', mode='w')" }, + { "dump_a_parameter", py_lp_dump_a_parameter, METH_VARARGS, + "S.dump_a_parameter(name, service_name, file_name='', mode='w')" }, + { "log_level", py_lp_log_level, METH_NOARGS, + "S.log_level() -> int\n Get the active log level" }, + { "samdb_url", py_samdb_url, METH_NOARGS, + "S.samdb_url() -> string\n" + "Returns the current URL for sam.ldb." }, + { "cache_path", py_cache_path, METH_VARARGS, + "S.cache_path(name) -> string\n" + "Returns a path in the Samba cache directory." }, + { "state_path", py_state_path, METH_VARARGS, + "S.state_path(name) -> string\n" + "Returns a path in the Samba state directory." }, + {0} +}; + +static PyObject *py_lp_ctx_default_service(PyObject *self, void *closure) +{ + return PyLoadparmService_FromService(lpcfg_default_service(PyLoadparmContext_AsLoadparmContext(self))); +} + +static PyObject *py_lp_ctx_config_file(PyObject *self, void *closure) +{ + const char *configfile = lpcfg_configfile(PyLoadparmContext_AsLoadparmContext(self)); + if (configfile == NULL) + Py_RETURN_NONE; + else + return PyUnicode_FromString(configfile); +} + +static PyObject *py_lp_ctx_weak_crypto(PyObject *self, void *closure) +{ + enum samba_weak_crypto weak_crypto = + lpcfg_weak_crypto(PyLoadparmContext_AsLoadparmContext(self)); + + switch(weak_crypto) { + case SAMBA_WEAK_CRYPTO_UNKNOWN: + Py_RETURN_NONE; + case SAMBA_WEAK_CRYPTO_ALLOWED: + return PyUnicode_FromString("allowed"); + case SAMBA_WEAK_CRYPTO_DISALLOWED: + return PyUnicode_FromString("disallowed"); + } + + Py_RETURN_NONE; +} + +static PyGetSetDef py_lp_ctx_getset[] = { + { + .name = discard_const_p(char, "default_service"), + .get = (getter)py_lp_ctx_default_service, + }, + { + .name = discard_const_p(char, "configfile"), + .get = (getter)py_lp_ctx_config_file, + .doc = discard_const_p(char, "Name of last config file that was loaded.") + }, + { + .name = discard_const_p(char, "weak_crypto"), + .get = (getter)py_lp_ctx_weak_crypto, + .doc = discard_const_p(char, "If weak crypto is allowed.") + }, + { .name = NULL } +}; + +static PyObject *py_lp_ctx_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) +{ + const char *kwnames[] = {"filename_for_non_global_lp", NULL}; + PyObject *lp_ctx; + const char *non_global_conf = NULL; + struct loadparm_context *ctx; + + if (!PyArg_ParseTupleAndKeywords(args, + kwargs, + "|s", + discard_const_p(char *, + kwnames), + &non_global_conf)) { + return NULL; + } + + /* + * by default, any LoadParm python objects map to a single global + * underlying object. The filename_for_non_global_lp arg overrides this + * default behaviour and creates a separate underlying LoadParm object. + */ + if (non_global_conf != NULL) { + bool ok; + ctx = loadparm_init(NULL); + if (ctx == NULL) { + PyErr_NoMemory(); + return NULL; + } + + lp_ctx = pytalloc_reference(type, ctx); + if (lp_ctx == NULL) { + PyErr_NoMemory(); + return NULL; + } + + ok = lpcfg_load_no_global( + PyLoadparmContext_AsLoadparmContext(lp_ctx), + non_global_conf); + if (!ok) { + PyErr_Format(PyExc_ValueError, + "Could not load non-global conf %s", + non_global_conf); + return NULL; + } + return lp_ctx; + } else{ + return pytalloc_reference(type, loadparm_init_global(false)); + } +} + +static Py_ssize_t py_lp_ctx_len(PyObject *self) +{ + return lpcfg_numservices(PyLoadparmContext_AsLoadparmContext(self)); +} + +static PyObject *py_lp_ctx_getitem(PyObject *self, PyObject *name) +{ + struct loadparm_service *service; + if (!PyUnicode_Check(name)) { + PyErr_SetString(PyExc_TypeError, "Only string subscripts are supported"); + return NULL; + } + service = lpcfg_service(PyLoadparmContext_AsLoadparmContext(self), PyUnicode_AsUTF8(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 = "param.LoadParm", + .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) +{ + bool show_defaults = false; + FILE *f; + const char *file_name = ""; + const char *mode = "w"; + struct loadparm_service *service = PyLoadparmService_AsLoadparmService(self); + struct loadparm_service *default_service; + PyObject *py_default_service; + + if (!PyArg_ParseTuple(args, "O|bss", &py_default_service, &show_defaults, &file_name, &mode)) + return NULL; + + if (file_name[0] == '\0') { + f = stdout; + } else { + f = fopen(file_name, mode); + } + + if (f == NULL) { + return NULL; + } + + if (!PyObject_TypeCheck(py_default_service, &PyLoadparmService)) { + PyErr_SetNone(PyExc_TypeError); + if (f != stdout) { + fclose(f); + } + return NULL; + } + + default_service = PyLoadparmService_AsLoadparmService(py_default_service); + + lpcfg_dump_one(f, show_defaults, service, default_service); + + if (f != stdout) { + fclose(f); + } + + Py_RETURN_NONE; +} + +static PyMethodDef py_lp_service_methods[] = { + { "dump", (PyCFunction)py_lp_service_dump, METH_VARARGS, + "S.dump(default_service, show_defaults=False, file_name='', mode='w')" }, + {0} +}; + +PyTypeObject PyLoadparmService = { + .tp_name = "param.LoadparmService", + .tp_methods = py_lp_service_methods, + .tp_flags = Py_TPFLAGS_DEFAULT, +}; + +static PyObject *py_data_dir(PyObject *self) +{ + return PyUnicode_FromString(dyn_DATADIR); +} + +static PyObject *py_default_path(PyObject *self, PyObject *Py_UNUSED(ignored)) +{ + return PyUnicode_FromString(lp_default_path()); +} + +static PyObject *py_setup_dir(PyObject *self, PyObject *Py_UNUSED(ignored)) +{ + return PyUnicode_FromString(dyn_SETUPDIR); +} + +static PyObject *py_modules_dir(PyObject *self, PyObject *Py_UNUSED(ignored)) +{ + return PyUnicode_FromString(dyn_MODULESDIR); +} + +static PyObject *py_bin_dir(PyObject *self, PyObject *Py_UNUSED(ignored)) +{ + return PyUnicode_FromString(dyn_BINDIR); +} + +static PyObject *py_sbin_dir(PyObject *self, PyObject *Py_UNUSED(ignored)) +{ + return PyUnicode_FromString(dyn_SBINDIR); +} + +static PyMethodDef pyparam_methods[] = { + { "data_dir", (PyCFunction)py_data_dir, METH_NOARGS, + "Returns the compiled in location of data directory." }, + { "default_path", (PyCFunction)py_default_path, METH_NOARGS, + "Returns the default smb.conf path." }, + { "setup_dir", (PyCFunction)py_setup_dir, METH_NOARGS, + "Returns the compiled in location of provision templates." }, + { "modules_dir", (PyCFunction)py_modules_dir, METH_NOARGS, + "Returns the compiled in location of modules." }, + { "bin_dir", (PyCFunction)py_bin_dir, METH_NOARGS, + "Returns the compiled in BINDIR." }, + { "sbin_dir", (PyCFunction)py_sbin_dir, METH_NOARGS, + "Returns the compiled in SBINDIR." }, + {0} +}; + +static struct PyModuleDef moduledef = { + PyModuleDef_HEAD_INIT, + .m_name = "param", + .m_doc = "Parsing and writing Samba configuration files.", + .m_size = -1, + .m_methods = pyparam_methods, +}; + +MODULE_INIT_FUNC(param) +{ + PyObject *m; + PyTypeObject *talloc_type = pytalloc_GetObjectType(); + if (talloc_type == NULL) + return NULL; + + if (pytalloc_BaseObject_PyType_Ready(&PyLoadparmContext) < 0) + return NULL; + + if (pytalloc_BaseObject_PyType_Ready(&PyLoadparmService) < 0) + return NULL; + + m = PyModule_Create(&moduledef); + if (m == NULL) + return NULL; + + Py_INCREF(&PyLoadparmContext); + PyModule_AddObject(m, "LoadParm", (PyObject *)&PyLoadparmContext); + return m; +} |