{{ message }}
forked from python/cpython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathgrpmodule.c
More file actions
349 lines (304 loc) · 8.35 KB
/
Copy pathgrpmodule.c
File metadata and controls
349 lines (304 loc) · 8.35 KB
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
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
/* UNIX group file access module */
#include "Python.h"
#include "posixmodule.h"
#include <grp.h>
#include "clinic/grpmodule.c.h"
/*[clinic input]
module grp
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=cade63f2ed1bd9f8]*/
static PyStructSequence_Field struct_group_type_fields[] = {
{"gr_name", "group name"},
{"gr_passwd", "password"},
{"gr_gid", "group id"},
{"gr_mem", "group members"},
{0}
};
PyDoc_STRVAR(struct_group__doc__,
"grp.struct_group: Results from getgr*() routines.\n\n\
This object may be accessed either as a tuple of\n\
(gr_name,gr_passwd,gr_gid,gr_mem)\n\
or via the object attributes as named in the above tuple.\n");
static PyStructSequence_Desc struct_group_type_desc = {
"grp.struct_group",
struct_group__doc__,
struct_group_type_fields,
4,
};
static int initialized;
static PyTypeObject StructGrpType;
#define DEFAULT_BUFFER_SIZE 1024
static PyObject *
mkgrent(struct group *p)
{
int setIndex = 0;
PyObject *v = PyStructSequence_New(&StructGrpType), *w;
char **member;
if (v == NULL)
return NULL;
if ((w = PyList_New(0)) == NULL) {
Py_DECREF(v);
return NULL;
}
for (member = p->gr_mem; *member != NULL; member++) {
PyObject *x = PyUnicode_DecodeFSDefault(*member);
if (x == NULL || PyList_Append(w, x) != 0) {
Py_XDECREF(x);
Py_DECREF(w);
Py_DECREF(v);
return NULL;
}
Py_DECREF(x);
}
#define SET(i,val) PyStructSequence_SET_ITEM(v, i, val)
SET(setIndex++, PyUnicode_DecodeFSDefault(p->gr_name));
if (p->gr_passwd)
SET(setIndex++, PyUnicode_DecodeFSDefault(p->gr_passwd));
else {
SET(setIndex++, Py_None);
Py_INCREF(Py_None);
}
SET(setIndex++, _PyLong_FromGid(p->gr_gid));
SET(setIndex++, w);
#undef SET
if (PyErr_Occurred()) {
Py_DECREF(v);
return NULL;
}
return v;
}
/*[clinic input]
grp.getgrgid
id: object
Return the group database entry for the given numeric group ID.
If id is not valid, raise KeyError.
[clinic start generated code]*/
static PyObject *
grp_getgrgid_impl(PyObject *module, PyObject *id)
/*[clinic end generated code: output=30797c289504a1ba input=15fa0e2ccf5cda25]*/
{
PyObject *py_int_id, *retval = NULL;
int nomem = 0;
char *buf = NULL, *buf2 = NULL;
gid_t gid;
struct group *p;
if (!_Py_Gid_Converter(id, &gid)) {
if (!PyErr_ExceptionMatches(PyExc_TypeError)) {
return NULL;
}
PyErr_Clear();
if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
"group id must be int, not %.200",
id->ob_type->tp_name) < 0) {
return NULL;
}
py_int_id = PyNumber_Long(id);
if (!py_int_id)
return NULL;
if (!_Py_Gid_Converter(py_int_id, &gid)) {
Py_DECREF(py_int_id);
return NULL;
}
Py_DECREF(py_int_id);
}
#ifdef HAVE_GETGRGID_R
int status;
Py_ssize_t bufsize;
/* Note: 'grp' will be used via pointer 'p' on getgrgid_r success. */
struct group grp;
Py_BEGIN_ALLOW_THREADS
bufsize = sysconf(_SC_GETGR_R_SIZE_MAX);
if (bufsize == -1) {
bufsize = DEFAULT_BUFFER_SIZE;
}
while (1) {
buf2 = PyMem_RawRealloc(buf, bufsize);
if (buf2 == NULL) {
p = NULL;
nomem = 1;
break;
}
buf = buf2;
status = getgrgid_r(gid, &grp, buf, bufsize, &p);
if (status != 0) {
p = NULL;
}
if (p != NULL || status != ERANGE) {
break;
}
if (bufsize > (PY_SSIZE_T_MAX >> 1)) {
nomem = 1;
break;
}
bufsize <<= 1;
}
Py_END_ALLOW_THREADS
#else
p = getgrgid(gid);
#endif
if (p == NULL) {
PyMem_RawFree(buf);
if (nomem == 1) {
return PyErr_NoMemory();
}
PyObject *gid_obj = _PyLong_FromGid(gid);
if (gid_obj == NULL)
return NULL;
PyErr_Format(PyExc_KeyError, "getgrgid(): gid not found: %S", gid_obj);
Py_DECREF(gid_obj);
return NULL;
}
retval = mkgrent(p);
#ifdef HAVE_GETGRGID_R
PyMem_RawFree(buf);
#endif
return retval;
}
/*[clinic input]
grp.getgrnam
name: unicode
Return the group database entry for the given group name.
If name is not valid, raise KeyError.
[clinic start generated code]*/
static PyObject *
grp_getgrnam_impl(PyObject *module, PyObject *name)
/*[clinic end generated code: output=67905086f403c21c input=08ded29affa3c863]*/
{
char *buf = NULL, *buf2 = NULL, *name_chars;
int nomem = 0;
struct group *p;
PyObject *bytes, *retval = NULL;
if ((bytes = PyUnicode_EncodeFSDefault(name)) == NULL)
return NULL;
/* check for embedded null bytes */
if (PyBytes_AsStringAndSize(bytes, &name_chars, NULL) == -1)
goto out;
#ifdef HAVE_GETGRNAM_R
int status;
Py_ssize_t bufsize;
/* Note: 'grp' will be used via pointer 'p' on getgrnam_r success. */
struct group grp;
Py_BEGIN_ALLOW_THREADS
bufsize = sysconf(_SC_GETGR_R_SIZE_MAX);
if (bufsize == -1) {
bufsize = DEFAULT_BUFFER_SIZE;
}
while(1) {
buf2 = PyMem_RawRealloc(buf, bufsize);
if (buf2 == NULL) {
p = NULL;
nomem = 1;
break;
}
buf = buf2;
status = getgrnam_r(name_chars, &grp, buf, bufsize, &p);
if (status != 0) {
p = NULL;
}
if (p != NULL || status != ERANGE) {
break;
}
if (bufsize > (PY_SSIZE_T_MAX >> 1)) {
nomem = 1;
break;
}
bufsize <<= 1;
}
Py_END_ALLOW_THREADS
#else
p = getgrnam(name_chars);
#endif
if (p == NULL) {
if (nomem == 1) {
PyErr_NoMemory();
}
else {
PyErr_Format(PyExc_KeyError, "getgrnam(): name not found: %R", name);
}
goto out;
}
retval = mkgrent(p);
out:
PyMem_RawFree(buf);
Py_DECREF(bytes);
return retval;
}
/*[clinic input]
grp.getgrall
Return a list of all available group entries, in arbitrary order.
An entry whose name starts with '+' or '-' represents an instruction
to use YP/NIS and may not be accessible via getgrnam or getgrgid.
[clinic start generated code]*/
static PyObject *
grp_getgrall_impl(PyObject *module)
/*[clinic end generated code: output=585dad35e2e763d7 input=d7df76c825c367df]*/
{
PyObject *d;
struct group *p;
if ((d = PyList_New(0)) == NULL)
return NULL;
setgrent();
while ((p = getgrent()) != NULL) {
PyObject *v = mkgrent(p);
if (v == NULL || PyList_Append(d, v) != 0) {
Py_XDECREF(v);
Py_DECREF(d);
endgrent();
return NULL;
}
Py_DECREF(v);
}
endgrent();
return d;
}
static PyMethodDef grp_methods[] = {
GRP_GETGRGID_METHODDEF
GRP_GETGRNAM_METHODDEF
GRP_GETGRALL_METHODDEF
{NULL, NULL}
};
PyDoc_STRVAR(grp__doc__,
"Access to the Unix group database.\n\
\n\
Group entries are reported as 4-tuples containing the following fields\n\
from the group database, in order:\n\
\n\
gr_name - name of the group\n\
gr_passwd - group password (encrypted); often empty\n\
gr_gid - numeric ID of the group\n\
gr_mem - list of members\n\
\n\
The gid is an integer, name and password are strings. (Note that most\n\
users are not explicitly listed as members of the groups they are in\n\
according to the password database. Check both databases to get\n\
complete membership information.)");
static struct PyModuleDef grpmodule = {
PyModuleDef_HEAD_INIT,
"grp",
grp__doc__,
-1,
grp_methods,
NULL,
NULL,
NULL,
NULL
};
PyMODINIT_FUNC
PyInit_grp(void)
{
PyObject *m, *d;
m = PyModule_Create(&grpmodule);
if (m == NULL)
return NULL;
d = PyModule_GetDict(m);
if (!initialized) {
if (PyStructSequence_InitType2(&StructGrpType,
&struct_group_type_desc) < 0)
return NULL;
}
if (PyDict_SetItemString(d, "struct_group",
(PyObject *)&StructGrpType) < 0)
return NULL;
initialized = 1;
return m;
}
You can’t perform that action at this time.