Python-2.7.3/Modules/spwdmodule.c

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  1 /* UNIX shadow password file access module */
  2 /* A lot of code has been taken from pwdmodule.c */
  3 /* For info also see http://www.unixpapa.com/incnote/passwd.html */
  4 
  5 #include "Python.h"
  6 #include "structseq.h"
  7 
  8 #include <sys/types.h>
  9 #ifdef HAVE_SHADOW_H
 10 #include <shadow.h>
 11 #endif
 12 
 13 
 14 PyDoc_STRVAR(spwd__doc__,
 15 "This module provides access to the Unix shadow password database.\n\
 16 It is available on various Unix versions.\n\
 17 \n\
 18 Shadow password database entries are reported as 9-tuples of type struct_spwd,\n\
 19 containing the following items from the password database (see `<shadow.h>'):\n\
 20 sp_namp, sp_pwdp, sp_lstchg, sp_min, sp_max, sp_warn, sp_inact, sp_expire, sp_flag.\n\
 21 The sp_namp and sp_pwdp are strings, the rest are integers.\n\
 22 An exception is raised if the entry asked for cannot be found.\n\
 23 You have to be root to be able to use this module.");
 24 
 25 
 26 #if defined(HAVE_GETSPNAM) || defined(HAVE_GETSPENT)
 27 
 28 static PyStructSequence_Field struct_spwd_type_fields[] = {
 29     {"sp_nam", "login name"},
 30     {"sp_pwd", "encrypted password"},
 31     {"sp_lstchg", "date of last change"},
 32     {"sp_min", "min #days between changes"},
 33     {"sp_max", "max #days between changes"},
 34     {"sp_warn", "#days before pw expires to warn user about it"},
 35     {"sp_inact", "#days after pw expires until account is blocked"},
 36     {"sp_expire", "#days since 1970-01-01 until account is disabled"},
 37     {"sp_flag", "reserved"},
 38     {0}
 39 };
 40 
 41 PyDoc_STRVAR(struct_spwd__doc__,
 42 "spwd.struct_spwd: Results from getsp*() routines.\n\n\
 43 This object may be accessed either as a 9-tuple of\n\
 44   (sp_nam,sp_pwd,sp_lstchg,sp_min,sp_max,sp_warn,sp_inact,sp_expire,sp_flag)\n\
 45 or via the object attributes as named in the above tuple.");
 46 
 47 static PyStructSequence_Desc struct_spwd_type_desc = {
 48     "spwd.struct_spwd",
 49     struct_spwd__doc__,
 50     struct_spwd_type_fields,
 51     9,
 52 };
 53 
 54 static int initialized;
 55 static PyTypeObject StructSpwdType;
 56 
 57 
 58 static void
 59 sets(PyObject *v, int i, char* val)
 60 {
 61   if (val)
 62       PyStructSequence_SET_ITEM(v, i, PyString_FromString(val));
 63   else {
 64       PyStructSequence_SET_ITEM(v, i, Py_None);
 65       Py_INCREF(Py_None);
 66   }
 67 }
 68 
 69 static PyObject *mkspent(struct spwd *p)
 70 {
 71     int setIndex = 0;
 72     PyObject *v = PyStructSequence_New(&StructSpwdType);
 73     if (v == NULL)
 74         return NULL;
 75 
 76 #define SETI(i,val) PyStructSequence_SET_ITEM(v, i, PyInt_FromLong((long) val))
 77 #define SETS(i,val) sets(v, i, val)
 78 
 79     SETS(setIndex++, p->sp_namp);
 80     SETS(setIndex++, p->sp_pwdp);
 81     SETI(setIndex++, p->sp_lstchg);
 82     SETI(setIndex++, p->sp_min);
 83     SETI(setIndex++, p->sp_max);
 84     SETI(setIndex++, p->sp_warn);
 85     SETI(setIndex++, p->sp_inact);
 86     SETI(setIndex++, p->sp_expire);
 87     SETI(setIndex++, p->sp_flag);
 88 
 89 #undef SETS
 90 #undef SETI
 91 
 92     if (PyErr_Occurred()) {
 93         Py_DECREF(v);
 94         return NULL;
 95     }
 96 
 97     return v;
 98 }
 99 
100 #endif  /* HAVE_GETSPNAM || HAVE_GETSPENT */
101 
102 
103 #ifdef HAVE_GETSPNAM
104 
105 PyDoc_STRVAR(spwd_getspnam__doc__,
106 "getspnam(name) -> (sp_namp, sp_pwdp, sp_lstchg, sp_min, sp_max,\n\
107                     sp_warn, sp_inact, sp_expire, sp_flag)\n\
108 Return the shadow password database entry for the given user name.\n\
109 See spwd.__doc__ for more on shadow password database entries.");
110 
111 static PyObject* spwd_getspnam(PyObject *self, PyObject *args)
112 {
113     char *name;
114     struct spwd *p;
115     if (!PyArg_ParseTuple(args, "s:getspnam", &name))
116         return NULL;
117     if ((p = getspnam(name)) == NULL) {
118         PyErr_SetString(PyExc_KeyError, "getspnam(): name not found");
119         return NULL;
120     }
121     return mkspent(p);
122 }
123 
124 #endif /* HAVE_GETSPNAM */
125 
126 #ifdef HAVE_GETSPENT
127 
128 PyDoc_STRVAR(spwd_getspall__doc__,
129 "getspall() -> list_of_entries\n\
130 Return a list of all available shadow password database entries, \
131 in arbitrary order.\n\
132 See spwd.__doc__ for more on shadow password database entries.");
133 
134 static PyObject *
135 spwd_getspall(PyObject *self, PyObject *args)
136 {
137     PyObject *d;
138     struct spwd *p;
139     if ((d = PyList_New(0)) == NULL)
140         return NULL;
141     setspent();
142     while ((p = getspent()) != NULL) {
143         PyObject *v = mkspent(p);
144         if (v == NULL || PyList_Append(d, v) != 0) {
145             Py_XDECREF(v);
146             Py_DECREF(d);
147             endspent();
148             return NULL;
149         }
150         Py_DECREF(v);
151     }
152     endspent();
153     return d;
154 }
155 
156 #endif /* HAVE_GETSPENT */
157 
158 static PyMethodDef spwd_methods[] = {
159 #ifdef HAVE_GETSPNAM
160     {"getspnam",        spwd_getspnam, METH_VARARGS, spwd_getspnam__doc__},
161 #endif
162 #ifdef HAVE_GETSPENT
163     {"getspall",        spwd_getspall, METH_NOARGS, spwd_getspall__doc__},
164 #endif
165     {NULL,              NULL}           /* sentinel */
166 };
167 
168 
169 PyMODINIT_FUNC
170 initspwd(void)
171 {
172     PyObject *m;
173     m=Py_InitModule3("spwd", spwd_methods, spwd__doc__);
174     if (m == NULL)
175         return;
176     if (!initialized)
177         PyStructSequence_InitType(&StructSpwdType,
178                                   &struct_spwd_type_desc);
179     Py_INCREF((PyObject *) &StructSpwdType);
180     PyModule_AddObject(m, "struct_spwd", (PyObject *) &StructSpwdType);
181     initialized = 1;
182 }