cpython/Modules/pwdmodule.c

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/* UNIX password file access module */
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#include "Python.h"
#include "structseq.h"
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#include <sys/types.h>
#include <pwd.h>
static PyStructSequence_Field struct_pwd_type_fields[] = {
{"pw_name", "user name"},
{"pw_passwd", "password"},
{"pw_uid", "user id"},
{"pw_gid", "group id"},
{"pw_gecos", "real name"},
{"pw_dir", "home directory"},
{"pw_shell", "shell program"},
{0}
};
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PyDoc_STRVAR(struct_passwd__doc__,
"pwd.struct_passwd: Results from getpw*() routines.\n\n\
This object may be accessed either as a tuple of\n\
(pw_name,pw_passwd,pw_uid,pw_gid,pw_gecos,pw_dir,pw_shell)\n\
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or via the object attributes as named in the above tuple.");
static PyStructSequence_Desc struct_pwd_type_desc = {
"pwd.struct_passwd",
struct_passwd__doc__,
struct_pwd_type_fields,
7,
};
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PyDoc_STRVAR(pwd__doc__,
"This module provides access to the Unix password database.\n\
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It is available on all Unix versions.\n\
\n\
Password database entries are reported as 7-tuples containing the following\n\
items from the password database (see `<pwd.h>'), in order:\n\
pw_name, pw_passwd, pw_uid, pw_gid, pw_gecos, pw_dir, pw_shell.\n\
The uid and gid items are integers, all others are strings. An\n\
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exception is raised if the entry asked for cannot be found.");
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static int initialized;
static PyTypeObject StructPwdType;
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static void
sets(PyObject *v, int i, char* val)
{
if (val)
PyStructSequence_SET_ITEM(v, i, PyString_FromString(val));
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else {
PyStructSequence_SET_ITEM(v, i, Py_None);
Py_INCREF(Py_None);
}
}
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static PyObject *
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mkpwent(struct passwd *p)
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{
int setIndex = 0;
PyObject *v = PyStructSequence_New(&StructPwdType);
if (v == NULL)
return NULL;
#define SETI(i,val) PyStructSequence_SET_ITEM(v, i, PyInt_FromLong((long) val))
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#define SETS(i,val) sets(v, i, val)
SETS(setIndex++, p->pw_name);
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#ifdef __VMS
SETS(setIndex++, "");
#else
SETS(setIndex++, p->pw_passwd);
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#endif
SETI(setIndex++, p->pw_uid);
SETI(setIndex++, p->pw_gid);
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#ifdef __VMS
SETS(setIndex++, "");
#else
SETS(setIndex++, p->pw_gecos);
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#endif
SETS(setIndex++, p->pw_dir);
SETS(setIndex++, p->pw_shell);
#undef SETS
#undef SETI
if (PyErr_Occurred()) {
Py_XDECREF(v);
return NULL;
}
return v;
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}
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PyDoc_STRVAR(pwd_getpwuid__doc__,
"getpwuid(uid) -> (pw_name,pw_passwd,pw_uid,\n\
pw_gid,pw_gecos,pw_dir,pw_shell)\n\
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Return the password database entry for the given numeric user ID.\n\
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See pwd.__doc__ for more on password database entries.");
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static PyObject *
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pwd_getpwuid(PyObject *self, PyObject *args)
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{
unsigned int uid;
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struct passwd *p;
if (!PyArg_ParseTuple(args, "I:getpwuid", &uid))
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return NULL;
if ((p = getpwuid(uid)) == NULL) {
PyErr_Format(PyExc_KeyError,
"getpwuid(): uid not found: %d", uid);
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return NULL;
}
return mkpwent(p);
}
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PyDoc_STRVAR(pwd_getpwnam__doc__,
"getpwnam(name) -> (pw_name,pw_passwd,pw_uid,\n\
pw_gid,pw_gecos,pw_dir,pw_shell)\n\
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Return the password database entry for the given user name.\n\
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See pwd.__doc__ for more on password database entries.");
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static PyObject *
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pwd_getpwnam(PyObject *self, PyObject *args)
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{
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char *name;
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struct passwd *p;
if (!PyArg_ParseTuple(args, "s:getpwnam", &name))
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return NULL;
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if ((p = getpwnam(name)) == NULL) {
PyErr_Format(PyExc_KeyError,
"getpwnam(): name not found: %s", name);
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return NULL;
}
return mkpwent(p);
}
#ifdef HAVE_GETPWENT
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PyDoc_STRVAR(pwd_getpwall__doc__,
"getpwall() -> list_of_entries\n\
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Return a list of all available password database entries, \
in arbitrary order.\n\
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See pwd.__doc__ for more on password database entries.");
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static PyObject *
pwd_getpwall(PyObject *self)
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{
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PyObject *d;
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struct passwd *p;
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if ((d = PyList_New(0)) == NULL)
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return NULL;
#if defined(PYOS_OS2) && defined(PYCC_GCC)
if ((p = getpwuid(0)) != NULL) {
#else
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setpwent();
while ((p = getpwent()) != NULL) {
#endif
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PyObject *v = mkpwent(p);
if (v == NULL || PyList_Append(d, v) != 0) {
Py_XDECREF(v);
Py_DECREF(d);
endpwent();
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return NULL;
}
Py_DECREF(v);
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}
endpwent();
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return d;
}
#endif
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static PyMethodDef pwd_methods[] = {
{"getpwuid", pwd_getpwuid, METH_VARARGS, pwd_getpwuid__doc__},
{"getpwnam", pwd_getpwnam, METH_VARARGS, pwd_getpwnam__doc__},
#ifdef HAVE_GETPWENT
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{"getpwall", (PyCFunction)pwd_getpwall,
METH_NOARGS, pwd_getpwall__doc__},
#endif
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{NULL, NULL} /* sentinel */
};
PyMODINIT_FUNC
initpwd(void)
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{
PyObject *m;
m = Py_InitModule3("pwd", pwd_methods, pwd__doc__);
if (m == NULL)
return;
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if (!initialized)
PyStructSequence_InitType(&StructPwdType,
&struct_pwd_type_desc);
Py_INCREF((PyObject *) &StructPwdType);
PyModule_AddObject(m, "struct_passwd", (PyObject *) &StructPwdType);
/* And for b/w compatibility (this was defined by mistake): */
Py_INCREF((PyObject *) &StructPwdType);
PyModule_AddObject(m, "struct_pwent", (PyObject *) &StructPwdType);
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initialized = 1;
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}