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#include <Python.h>
#include <sys/time.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
static PyObject *
posix_error_with_allocated_filename(char* name) {
PyObject *rc = PyErr_SetFromErrnoWithFilename(PyExc_OSError, name);
PyMem_Free(name);
return rc; }
static int
extract_time(PyObject *ts, long *sec, long *usec) {
long intval;
if (PyFloat_Check(ts)) {
double tval = PyFloat_AsDouble(ts);
PyObject *intobj = Py_TYPE(ts)->tp_as_number->nb_int(ts);
if (!intobj) return -1;
intval = PyInt_AsLong(intobj);
Py_DECREF(intobj);
if (intval == -1 && PyErr_Occurred()) return -1;
*sec = intval;
*usec = (long)((tval - intval) * 1e6); // can't exceed 1000000
if (*usec < 0) *usec = 0; } // if rounding gave us a negative number, truncate
else {
intval = PyInt_AsLong(ts);
if (intval == -1 && PyErr_Occurred()) return -1;
*sec = intval;
*usec = 0; }
return 0; }
static PyObject *
oe_lutimes(PyObject *self, PyObject *args) { // (str) filename, (tuple) (atime, mtime)
char *path; PyObject *ftimes;
if (!PyArg_ParseTuple( args, "etO:utime",
Py_FileSystemDefaultEncoding, &path, &ftimes )) return NULL;
struct timeval tv[2];
if (PyTuple_Check(ftimes) && PyTuple_Size(ftimes) == 2) {
int i;
for (i=0; i<2; i++) {
if ( extract_time(PyTuple_GET_ITEM(ftimes, i),
&tv[i].tv_sec, &tv[i].tv_usec) == -1 ) {
PyMem_Free(path);
return NULL; } }
Py_BEGIN_ALLOW_THREADS
i = lutimes(path, tv);
Py_END_ALLOW_THREADS
if (i < 0) return posix_error_with_allocated_filename(path); }
else {
PyErr_SetString(PyExc_TypeError,
"lutimes() arg 2 must be a tuple (atime, mtime)");
PyMem_Free(path);
return NULL; }
Py_RETURN_NONE; }
typedef struct {
PyObject_HEAD
DIR *dir;
} Gen_DirListing;
static void Gen_DirListing_dealloc(Gen_DirListing *self) {
if (self->dir != NULL) {
Py_BEGIN_ALLOW_THREADS
closedir(self->dir);
Py_END_ALLOW_THREADS }
Py_TYPE(self)->tp_free((PyObject *)self); }
static PyObject *Gen_DirListing_iter(PyObject *self, PyObject *args) {
Py_INCREF(self);
return self; }
static PyObject *Gen_DirListing_next(PyObject *self, PyObject *args) {
Gen_DirListing *gen = (Gen_DirListing *)self;
struct dirent *entry;
for (;;) {
errno = 0;
Py_BEGIN_ALLOW_THREADS
entry = readdir(gen->dir);
Py_END_ALLOW_THREADS
if (entry == NULL) {
if (errno == 0) PyErr_SetNone(PyExc_StopIteration);
else PyErr_SetFromErrno(PyExc_OSError);
break; }
if (entry->d_name[0] == '.' && ( strlen(entry->d_name) == 1 ||
(entry->d_name[1] == '.' && strlen(entry->d_name) == 2) )) continue;
return PyString_FromStringAndSize(
entry->d_name, strlen(entry->d_name) ); }
return NULL; }
PyTypeObject Gen_DirListingType = {
PyObject_HEAD_INIT(NULL)
0, "os_ext._DirListingGenerator", sizeof(Gen_DirListing), 0,
(destructor)Gen_DirListing_dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER,
0, 0, 0, 0, 0, (getiterfunc)Gen_DirListing_iter, (iternextfunc)Gen_DirListing_next };
static PyObject *
oe_listdir(PyObject *self, PyObject *args) { // (str) dirname
char *path;
if (!PyArg_ParseTuple( args, "et:path",
Py_FileSystemDefaultEncoding, &path )) return NULL;
DIR *dir;
Py_BEGIN_ALLOW_THREADS
dir = opendir(path);
Py_END_ALLOW_THREADS
if (dir == NULL) return posix_error_with_allocated_filename(path);
Gen_DirListing *gen;
if (!(gen = PyObject_New(Gen_DirListing, &Gen_DirListingType))) goto fail;
if (!PyObject_Init((PyObject *)gen, &Gen_DirListingType)) {
Py_DECREF(gen);
goto fail; }
gen->dir = dir;
return (PyObject *)gen;
fail:
Py_BEGIN_ALLOW_THREADS
closedir(dir);
Py_END_ALLOW_THREADS
PyMem_Free(path);
return NULL; }
static PyMethodDef oe_methods[] = {
{"lutimes", oe_lutimes, METH_VARARGS,
"Change atime/mtime of a given inode (w/o dereferencing symlinks).\n"
"Arguments are path and (atime, mtime) tuple, same as for os.utimes."},
{"listdir", oe_listdir, METH_VARARGS,
"List directory contents in iterative fashion. Returns generator object."},
{NULL, NULL, 0, NULL} };
PyDoc_STRVAR( oe__doc__,
"Less-conventional OS/libc interfaces" );
PyMODINIT_FUNC
initos_ext(void) {
PyObject *module;
if (PyType_Ready(&Gen_DirListingType) < 0) return;
module = Py_InitModule3("os_ext", oe_methods, oe__doc__);
Py_INCREF(&Gen_DirListingType);
PyModule_AddObject(module, "_DirListing", (PyObject *)&Gen_DirListingType); };
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