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python/Modules/grpmodule.c at master · abc100900/python · GitHub
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/* UNIX group file access module */
#include
"Python.h"
#include
"structseq.h"
#include
<sys/types.h>
#include
<grp.h>
static
PyStructSequence_Field
struct_group_type_fields
[]
=
{
{
"gr_name"
,
"group name"
},
{
"gr_passwd"
,
"password"
},
{
"gr_gid"
,
"group id"
},
{
"gr_mem"
,
"group memebers"
},
{
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
;
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
=
PyString_FromString
(
*
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
++
,
PyString_FromString
(
p
->
gr_name
));
#ifdef
__VMS
SET
(
setIndex
++
,
Py_None
);
Py_INCREF
(
Py_None
);
#else
if
(
p
->
gr_passwd
)
SET
(
setIndex
++
,
PyString_FromString
(
p
->
gr_passwd
));
else
{
SET
(
setIndex
++
,
Py_None
);
Py_INCREF
(
Py_None
);
}
#endif
SET
(
setIndex
++
,
PyInt_FromLong
((
long
)
p
->
gr_gid
));
SET
(
setIndex
++
,
w
);
#undef
SET
if
(
PyErr_Occurred
()) {
Py_DECREF
(
v
);
Py_DECREF
(
w
);
return
NULL
;
}
return
v
;
}
static
PyObject
*
grp_getgrgid
(
PyObject
*
self
,
PyObject
*
pyo_id
)
{
PyObject
*
py_int_id
;
unsigned
int
gid
;
struct
group
*
p
;
py_int_id
=
PyNumber_Int
(
pyo_id
);
if
(!
py_int_id
)
return
NULL
;
gid
=
PyInt_AS_LONG
(
py_int_id
);
Py_DECREF
(
py_int_id
);
if
((
p
=
getgrgid
(
gid
))
==
NULL
) {
PyErr_Format
(
PyExc_KeyError
,
"getgrgid(): gid not found: %d"
,
gid
);
return
NULL
;
}
return
mkgrent
(
p
);
}
static
PyObject
*
grp_getgrnam
(
PyObject
*
self
,
PyObject
*
pyo_name
)
{
PyObject
*
py_str_name
;
char
*
name
;
struct
group
*
p
;
py_str_name
=
PyObject_Str
(
pyo_name
);
if
(!
py_str_name
)
return
NULL
;
name
=
PyString_AS_STRING
(
py_str_name
);
if
((
p
=
getgrnam
(
name
))
==
NULL
) {
PyErr_Format
(
PyExc_KeyError
,
"getgrnam(): name not found: %s"
,
name
);
Py_DECREF
(
py_str_name
);
return
NULL
;
}
Py_DECREF
(
py_str_name
);
return
mkgrent
(
p
);
}
static
PyObject
*
grp_getgrall
(
PyObject
*
self
,
PyObject
*
ignore
)
{
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
);
return
NULL
;
}
Py_DECREF
(
v
);
}
endgrent
();
return
d
;
}
static
PyMethodDef
grp_methods
[]
=
{
{
"getgrgid"
,
grp_getgrgid
,
METH_O
,
"getgrgid(id) -> tuple\n\
Return the group database entry for the given numeric group ID. If\n\
id is not valid, raise KeyError."
},
{
"getgrnam"
,
grp_getgrnam
,
METH_O
,
"getgrnam(name) -> tuple\n\
Return the group database entry for the given group name. If\n\
name is not valid, raise KeyError."
},
{
"getgrall"
,
grp_getgrall
,
METH_NOARGS
,
"getgrall() -> list of tuples\n\
Return a list of all available group entries, in arbitrary order."
},
{
NULL
,
NULL
}
/* sentinel */
};
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\
name - name of the group\n\
passwd - group password (encrypted); often empty\n\
gid - numeric ID of the group\n\
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.)"
);
PyMODINIT_FUNC
initgrp
(
void
)
{
PyObject
*
m
,
*
d
;
m
=
Py_InitModule3
(
"grp"
,
grp_methods
,
grp__doc__
);
if
(
m
==
NULL
)
return
;
d
=
PyModule_GetDict
(
m
);
if
(!
initialized
)
PyStructSequence_InitType
(
&
StructGrpType
,
&
struct_group_type_desc
);
PyDict_SetItemString
(
d
,
"struct_group"
, (
PyObject
*
)
&
StructGrpType
);
initialized
=
1
;
}
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