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/*
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osutil.c - native operating system services
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Copyright 2007 Matt Mackall and others
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This software may be used and distributed according to the terms of
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the GNU General Public License, incorporated herein by reference.
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*/
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#define _ATFILE_SOURCE
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#include <Python.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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struct listdir_stat {
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PyObject_HEAD
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struct stat st;
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};
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#define listdir_slot(name) \
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static PyObject *listdir_stat_##name(PyObject *self, void *x) \
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{ \
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return PyInt_FromLong(((struct listdir_stat *)self)->st.name); \
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}
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listdir_slot(st_dev)
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listdir_slot(st_mode)
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listdir_slot(st_nlink)
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listdir_slot(st_size)
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listdir_slot(st_mtime)
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listdir_slot(st_ctime)
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static struct PyGetSetDef listdir_stat_getsets[] = {
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{"st_dev", listdir_stat_st_dev, 0, 0, 0},
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{"st_mode", listdir_stat_st_mode, 0, 0, 0},
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{"st_nlink", listdir_stat_st_nlink, 0, 0, 0},
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{"st_size", listdir_stat_st_size, 0, 0, 0},
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{"st_mtime", listdir_stat_st_mtime, 0, 0, 0},
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{"st_ctime", listdir_stat_st_ctime, 0, 0, 0},
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{0, 0, 0, 0, 0}
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};
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static PyObject *listdir_stat_new(PyTypeObject *t, PyObject *a, PyObject *k)
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{
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return t->tp_alloc(t, 0);
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}
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static void listdir_stat_dealloc(PyObject *o)
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{
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o->ob_type->tp_free(o);
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}
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static PyTypeObject listdir_stat_type = {
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PyObject_HEAD_INIT(NULL)
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0, /*ob_size*/
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"osutil.stat", /*tp_name*/
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sizeof(struct listdir_stat), /*tp_basicsize*/
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0, /*tp_itemsize*/
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(destructor)listdir_stat_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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0, /*tp_getattr*/
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0, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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0, /*tp_hash */
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0, /*tp_call*/
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0, /*tp_str*/
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0, /*tp_getattro*/
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0, /*tp_setattro*/
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0, /*tp_as_buffer*/
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Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
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"stat objects", /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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0, /* tp_members */
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listdir_stat_getsets, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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listdir_stat_new, /* tp_new */
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};
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#ifdef AT_SYMLINK_NOFOLLOW
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#define USEFDOPEN 1
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#else
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#define USEFDOPEN 0
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#endif
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int entkind(struct dirent *ent)
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{
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#ifdef DT_REG
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switch (ent->d_type) {
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case DT_REG: return S_IFREG;
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case DT_DIR: return S_IFDIR;
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case DT_LNK: return S_IFLNK;
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case DT_BLK: return S_IFBLK;
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case DT_CHR: return S_IFCHR;
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case DT_FIFO: return S_IFIFO;
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case DT_SOCK: return S_IFSOCK;
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}
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#endif
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}
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static PyObject *listdir(PyObject *self, PyObject *args, PyObject *kwargs)
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{
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static char *kwlist[] = { "path", "stat", NULL };
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PyObject *statflag = NULL, *list, *elem, *stat, *ret = NULL;
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char fullpath[PATH_MAX + 10], *path;
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int pathlen, keepstat, kind, dfd, err;
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struct stat st;
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struct dirent *ent;
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DIR *dir;
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|O:listdir", kwlist,
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&path, &pathlen, &statflag))
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goto error_parse;
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strncpy(fullpath, path, PATH_MAX);
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fullpath[pathlen] = '/';
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keepstat = statflag && PyObject_IsTrue(statflag);
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if (USEFDOPEN) {
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dfd = open(path, O_RDONLY);
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if (dfd == -1) {
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PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
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goto error_parse;
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}
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dir = fdopendir(dfd);
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} else
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dir = opendir(path);
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if (!dir) {
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PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
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goto error_dir;
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}
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list = PyList_New(0);
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if (!list)
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goto error_list;
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while ((ent = readdir(dir))) {
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if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
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continue;
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kind = entkind(ent);
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if (kind == -1 || keepstat) {
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if (USEFDOPEN)
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err = fstatat(dfd, ent->d_name, &st,
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AT_SYMLINK_NOFOLLOW);
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else {
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strncpy(fullpath + pathlen + 1, ent->d_name,
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PATH_MAX - pathlen);
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fullpath[PATH_MAX] = 0;
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err = lstat(fullpath, &st);
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}
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if (err == -1) {
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strncpy(fullpath + pathlen + 1, ent->d_name,
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PATH_MAX - pathlen);
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fullpath[PATH_MAX] = 0;
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PyErr_SetFromErrnoWithFilename(PyExc_OSError,
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fullpath);
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goto error;
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}
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kind = st.st_mode & S_IFMT;
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}
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if (keepstat) {
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stat = PyObject_CallObject((PyObject *)&listdir_stat_type, NULL);
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if (!stat)
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goto error;
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memcpy(&((struct listdir_stat *)stat)->st, &st, sizeof(st));
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elem = Py_BuildValue("siN", ent->d_name, kind, stat);
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} else
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elem = Py_BuildValue("si", ent->d_name, kind);
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if (!elem)
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goto error;
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PyList_Append(list, elem);
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Py_DECREF(elem);
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}
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PyList_Sort(list);
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ret = list;
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Py_INCREF(ret);
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error:
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Py_DECREF(list);
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error_list:
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closedir(dir);
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error_dir:
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if (USEFDOPEN)
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close(dfd);
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error_parse:
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return ret;
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}
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static char osutil_doc[] = "Native operating system services.";
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static PyMethodDef methods[] = {
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{"listdir", (PyCFunction)listdir, METH_VARARGS | METH_KEYWORDS,
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"list a directory\n"},
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{NULL, NULL}
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};
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PyMODINIT_FUNC initosutil(void)
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{
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if (PyType_Ready(&listdir_stat_type) == -1)
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return;
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Py_InitModule3("osutil", methods, osutil_doc);
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}
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