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
|
/* dl module */
#include "Python.h"
#include <dlfcn.h>
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
typedef void *PyUnivPtr;
typedef struct {
PyObject_HEAD
PyUnivPtr *dl_handle;
} dlobject;
staticforward PyTypeObject Dltype;
static PyObject *Dlerror;
static PyObject *
newdlobject(PyUnivPtr *handle)
{
dlobject *xp;
xp = PyObject_New(dlobject, &Dltype);
if (xp == NULL)
return NULL;
xp->dl_handle = handle;
return (PyObject *)xp;
}
static void
dl_dealloc(dlobject *xp)
{
if (xp->dl_handle != NULL)
dlclose(xp->dl_handle);
PyObject_Del(xp);
}
static PyObject *
dl_close(dlobject *xp)
{
if (xp->dl_handle != NULL) {
dlclose(xp->dl_handle);
xp->dl_handle = NULL;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
dl_sym(dlobject *xp, PyObject *args)
{
char *name;
PyUnivPtr *func;
if (PyString_Check(args)) {
name = PyString_AS_STRING(args);
} else {
PyErr_Format(PyExc_TypeError, "expected string, found %.200s",
args->ob_type->tp_name);
return NULL;
}
func = dlsym(xp->dl_handle, name);
if (func == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyInt_FromLong((long)func);
}
static PyObject *
dl_call(dlobject *xp, PyObject *args)
{
PyObject *name;
long (*func)(long, long, long, long, long,
long, long, long, long, long);
long alist[10];
long res;
int i;
int n = PyTuple_Size(args);
if (n < 1) {
PyErr_SetString(PyExc_TypeError, "at least a name is needed");
return NULL;
}
name = PyTuple_GetItem(args, 0);
if (!PyString_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"function name must be a string");
return NULL;
}
func = (long (*)(long, long, long, long, long,
long, long, long, long, long))
dlsym(xp->dl_handle, PyString_AsString(name));
if (func == NULL) {
PyErr_SetString(PyExc_ValueError, dlerror());
return NULL;
}
if (n-1 > 10) {
PyErr_SetString(PyExc_TypeError,
"too many arguments (max 10)");
return NULL;
}
for (i = 1; i < n; i++) {
PyObject *v = PyTuple_GetItem(args, i);
if (PyInt_Check(v))
alist[i-1] = PyInt_AsLong(v);
else if (PyString_Check(v))
alist[i-1] = (long)PyString_AsString(v);
else if (v == Py_None)
alist[i-1] = (long) ((char *)NULL);
else {
PyErr_SetString(PyExc_TypeError,
"arguments must be int, string or None");
return NULL;
}
}
for (; i <= 10; i++)
alist[i-1] = 0;
res = (*func)(alist[0], alist[1], alist[2], alist[3], alist[4],
alist[5], alist[6], alist[7], alist[8], alist[9]);
return PyInt_FromLong(res);
}
static PyMethodDef dlobject_methods[] = {
{"call", (PyCFunction)dl_call, METH_VARARGS},
{"sym", (PyCFunction)dl_sym, METH_O},
{"close", (PyCFunction)dl_close, METH_NOARGS},
{NULL, NULL} /* Sentinel */
};
static PyObject *
dl_getattr(dlobject *xp, char *name)
{
return Py_FindMethod(dlobject_methods, (PyObject *)xp, name);
}
static PyTypeObject Dltype = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"dl.dl", /*tp_name*/
sizeof(dlobject), /*tp_basicsize*/
0, /*tp_itemsize*/
/* methods */
(destructor)dl_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)dl_getattr,/*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash*/
};
static PyObject *
dl_open(PyObject *self, PyObject *args)
{
char *name;
int mode;
PyUnivPtr *handle;
if (sizeof(int) != sizeof(long) ||
sizeof(long) != sizeof(char *)) {
PyErr_SetString(PyExc_SystemError,
"module dl requires sizeof(int) == sizeof(long) == sizeof(char*)");
return NULL;
}
if (PyArg_ParseTuple(args, "z:open", &name))
mode = RTLD_LAZY;
else {
PyErr_Clear();
if (!PyArg_ParseTuple(args, "zi:open", &name, &mode))
return NULL;
#ifndef RTLD_NOW
if (mode != RTLD_LAZY) {
PyErr_SetString(PyExc_ValueError, "mode must be 1");
return NULL;
}
#endif
}
handle = dlopen(name, mode);
if (handle == NULL) {
PyErr_SetString(Dlerror, dlerror());
return NULL;
}
return newdlobject(handle);
}
static PyMethodDef dl_methods[] = {
{"open", dl_open, METH_VARARGS},
{NULL, NULL} /* sentinel */
};
/* From socketmodule.c
* Convenience routine to export an integer value.
*
* Errors are silently ignored, for better or for worse...
*/
static void
insint(PyObject *d, char *name, int value)
{
PyObject *v = PyInt_FromLong((long) value);
if (!v || PyDict_SetItemString(d, name, v))
PyErr_Clear();
Py_XDECREF(v);
}
DL_EXPORT(void)
initdl(void)
{
PyObject *m, *d, *x;
/* Initialize object type */
Dltype.ob_type = &PyType_Type;
/* Create the module and add the functions */
m = Py_InitModule("dl", dl_methods);
/* Add some symbolic constants to the module */
d = PyModule_GetDict(m);
Dlerror = x = PyErr_NewException("dl.error", NULL, NULL);
PyDict_SetItemString(d, "error", x);
x = PyInt_FromLong((long)RTLD_LAZY);
PyDict_SetItemString(d, "RTLD_LAZY", x);
#define INSINT(X) insint(d,#X,X)
#ifdef RTLD_NOW
INSINT(RTLD_NOW);
#endif
#ifdef RTLD_NOLOAD
INSINT(RTLD_NOLOAD);
#endif
#ifdef RTLD_GLOBAL
INSINT(RTLD_GLOBAL);
#endif
#ifdef RTLD_LOCAL
INSINT(RTLD_LOCAL);
#endif
#ifdef RTLD_PARENT
INSINT(RTLD_PARENT);
#endif
#ifdef RTLD_GROUP
INSINT(RTLD_GROUP);
#endif
#ifdef RTLD_WORLD
INSINT(RTLD_WORLD);
#endif
#ifdef RTLD_NODELETE
INSINT(RTLD_NODELETE);
#endif
}
|
