Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation. Xattr manipulation bindings.
3 : Copyright (C) Matthieu Patou <mat@matws.net> 2009-2010
4 : Base on work of pyglue.c by Jelmer Vernooij <jelmer@samba.org> 2007 and
5 : Matthias Dieter Wallnöfer 2009
6 :
7 : This program is free software; you can redistribute it and/or modify
8 : it under the terms of the GNU General Public License as published by
9 : the Free Software Foundation; either version 3 of the License, or
10 : (at your option) any later version.
11 :
12 : This program is distributed in the hope that it will be useful,
13 : but WITHOUT ANY WARRANTY; without even the implied warranty of
14 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 : GNU General Public License for more details.
16 :
17 : You should have received a copy of the GNU General Public License
18 : along with this program. If not, see <http://www.gnu.org/licenses/>.
19 : */
20 :
21 : #include "lib/replace/system/python.h"
22 : #include "python/py3compat.h"
23 : #include "includes.h"
24 : #include "system/filesys.h"
25 : #include <tdb.h>
26 : #include "lib/tdb_wrap/tdb_wrap.h"
27 : #include "librpc/ndr/libndr.h"
28 : #include "ntvfs/posix/posix_eadb.h"
29 : #include "libcli/util/pyerrors.h"
30 : #include "param/pyparam.h"
31 : #include "lib/dbwrap/dbwrap.h"
32 : #include "lib/dbwrap/dbwrap_open.h"
33 : #include "lib/dbwrap/dbwrap_tdb.h"
34 : #include "source3/lib/xattr_tdb.h"
35 :
36 0 : static PyObject *py_is_xattr_supported(PyObject *self,
37 : PyObject *Py_UNUSED(ignored))
38 : {
39 0 : Py_RETURN_TRUE;
40 : }
41 :
42 250 : static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
43 : {
44 4 : char *filename, *attribute, *tdbname;
45 4 : DATA_BLOB blob;
46 4 : Py_ssize_t blobsize;
47 4 : int ret;
48 4 : TALLOC_CTX *mem_ctx;
49 4 : struct loadparm_context *lp_ctx;
50 250 : struct db_context *eadb = NULL;
51 4 : struct file_id id;
52 4 : struct stat sbuf;
53 :
54 250 : if (!PyArg_ParseTuple(args, "sss"PYARG_BYTES_LEN, &tdbname, &filename, &attribute,
55 : &blob.data, &blobsize))
56 0 : return NULL;
57 :
58 250 : blob.length = blobsize;
59 250 : mem_ctx = talloc_new(NULL);
60 :
61 250 : lp_ctx = py_default_loadparm_context(mem_ctx);
62 250 : eadb = db_open_tdb(mem_ctx, tdbname, 50000,
63 : lpcfg_tdb_flags(lp_ctx, TDB_DEFAULT),
64 : O_RDWR|O_CREAT, 0600, DBWRAP_LOCK_ORDER_2,
65 : DBWRAP_FLAG_NONE);
66 :
67 250 : if (eadb == NULL) {
68 1 : PyErr_SetFromErrno(PyExc_IOError);
69 1 : talloc_free(mem_ctx);
70 1 : return NULL;
71 : }
72 :
73 249 : ret = stat(filename, &sbuf);
74 249 : if (ret < 0) {
75 2 : PyErr_SetFromErrno(PyExc_IOError);
76 2 : talloc_free(mem_ctx);
77 2 : return NULL;
78 : }
79 :
80 247 : ZERO_STRUCT(id);
81 247 : id.devid = sbuf.st_dev;
82 247 : id.inode = sbuf.st_ino;
83 :
84 247 : ret = xattr_tdb_setattr(eadb, &id, attribute, blob.data, blob.length, 0);
85 247 : if (ret < 0) {
86 0 : PyErr_SetFromErrno(PyExc_TypeError);
87 0 : talloc_free(mem_ctx);
88 0 : return NULL;
89 : }
90 247 : talloc_free(mem_ctx);
91 247 : Py_RETURN_NONE;
92 : }
93 :
94 203 : static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
95 : {
96 2 : char *filename, *attribute, *tdbname;
97 2 : TALLOC_CTX *mem_ctx;
98 2 : struct loadparm_context *lp_ctx;
99 2 : DATA_BLOB blob;
100 2 : PyObject *ret_obj;
101 2 : int ret;
102 2 : ssize_t xattr_size;
103 203 : struct db_context *eadb = NULL;
104 2 : struct file_id id;
105 2 : struct stat sbuf;
106 :
107 203 : if (!PyArg_ParseTuple(args, "sss", &tdbname, &filename, &attribute))
108 0 : return NULL;
109 :
110 203 : mem_ctx = talloc_new(NULL);
111 :
112 203 : lp_ctx = py_default_loadparm_context(mem_ctx);
113 203 : eadb = db_open_tdb(mem_ctx, tdbname, 50000,
114 : lpcfg_tdb_flags(lp_ctx, TDB_DEFAULT),
115 : O_RDWR|O_CREAT, 0600, DBWRAP_LOCK_ORDER_2,
116 : DBWRAP_FLAG_NONE);
117 :
118 203 : if (eadb == NULL) {
119 0 : PyErr_SetFromErrno(PyExc_IOError);
120 0 : talloc_free(mem_ctx);
121 0 : return NULL;
122 : }
123 :
124 203 : ret = stat(filename, &sbuf);
125 203 : if (ret < 0) {
126 2 : PyErr_SetFromErrno(PyExc_IOError);
127 2 : talloc_free(mem_ctx);
128 2 : return NULL;
129 : }
130 :
131 201 : ZERO_STRUCT(id);
132 201 : id.devid = sbuf.st_dev;
133 201 : id.inode = sbuf.st_ino;
134 :
135 201 : xattr_size = xattr_tdb_getattr(eadb, mem_ctx, &id, attribute, &blob);
136 201 : if (xattr_size < 0) {
137 24 : PyErr_SetFromErrno(PyExc_TypeError);
138 24 : talloc_free(mem_ctx);
139 24 : return NULL;
140 : }
141 177 : ret_obj = Py_BuildValue(PYARG_BYTES_LEN, blob.data, xattr_size);
142 177 : talloc_free(mem_ctx);
143 177 : return ret_obj;
144 : }
145 :
146 : static PyMethodDef py_xattr_methods[] = {
147 : { "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
148 : "wrap_getxattr(filename,attribute) -> blob\n"
149 : "Retrieve given attribute on the given file." },
150 : { "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
151 : "wrap_setxattr(filename,attribute,value)\n"
152 : "Set the given attribute to the given value on the given file." },
153 : { "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
154 : "Return true if xattr are supported on this system\n"},
155 : {0}
156 : };
157 :
158 : static struct PyModuleDef moduledef = {
159 : PyModuleDef_HEAD_INIT,
160 : .m_name = "xattr_tdb",
161 : .m_doc = "Python bindings for xattr manipulation.",
162 : .m_size = -1,
163 : .m_methods = py_xattr_methods,
164 : };
165 :
166 2808 : MODULE_INIT_FUNC(xattr_tdb)
167 : {
168 78 : PyObject *m;
169 :
170 2808 : m = PyModule_Create(&moduledef);
171 :
172 2808 : if (m == NULL)
173 0 : return NULL;
174 :
175 2730 : return m;
176 : }
177 :
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