osutil.c
231 lines
| 5.9 KiB
| text/x-c
|
CLexer
/ mercurial / osutil.c
Bryan O'Sullivan
|
r5396 | /* | ||
osutil.c - native operating system services | ||||
Copyright 2007 Matt Mackall and others | ||||
This software may be used and distributed according to the terms of | ||||
the GNU General Public License, incorporated herein by reference. | ||||
*/ | ||||
Bryan O'Sullivan
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r5463 | #define _ATFILE_SOURCE | ||
Alexis S. L. Carvalho
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r5397 | #include <Python.h> | ||
Bryan O'Sullivan
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r5396 | #include <dirent.h> | ||
#include <fcntl.h> | ||||
#include <string.h> | ||||
#include <sys/stat.h> | ||||
#include <sys/types.h> | ||||
#include <unistd.h> | ||||
struct listdir_stat { | ||||
Matt Mackall
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r5421 | PyObject_HEAD | ||
struct stat st; | ||||
Bryan O'Sullivan
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r5396 | }; | ||
#define listdir_slot(name) \ | ||||
static PyObject *listdir_stat_##name(PyObject *self, void *x) \ | ||||
{ \ | ||||
Matt Mackall
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r5421 | return PyInt_FromLong(((struct listdir_stat *)self)->st.name); \ | ||
Bryan O'Sullivan
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r5396 | } | ||
Bryan O'Sullivan
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r5431 | listdir_slot(st_dev) | ||
listdir_slot(st_mode) | ||||
listdir_slot(st_nlink) | ||||
listdir_slot(st_size) | ||||
listdir_slot(st_mtime) | ||||
listdir_slot(st_ctime) | ||||
Bryan O'Sullivan
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r5396 | |||
static struct PyGetSetDef listdir_stat_getsets[] = { | ||||
Matt Mackall
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r5421 | {"st_dev", listdir_stat_st_dev, 0, 0, 0}, | ||
{"st_mode", listdir_stat_st_mode, 0, 0, 0}, | ||||
{"st_nlink", listdir_stat_st_nlink, 0, 0, 0}, | ||||
{"st_size", listdir_stat_st_size, 0, 0, 0}, | ||||
{"st_mtime", listdir_stat_st_mtime, 0, 0, 0}, | ||||
{"st_ctime", listdir_stat_st_ctime, 0, 0, 0}, | ||||
{0, 0, 0, 0, 0} | ||||
Bryan O'Sullivan
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r5396 | }; | ||
static PyObject *listdir_stat_new(PyTypeObject *t, PyObject *a, PyObject *k) | ||||
{ | ||||
Matt Mackall
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r5421 | return t->tp_alloc(t, 0); | ||
Bryan O'Sullivan
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r5396 | } | ||
static void listdir_stat_dealloc(PyObject *o) | ||||
{ | ||||
Matt Mackall
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r5421 | o->ob_type->tp_free(o); | ||
Bryan O'Sullivan
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r5396 | } | ||
static PyTypeObject listdir_stat_type = { | ||||
Matt Mackall
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r5421 | PyObject_HEAD_INIT(NULL) | ||
0, /*ob_size*/ | ||||
"osutil.stat", /*tp_name*/ | ||||
sizeof(struct listdir_stat), /*tp_basicsize*/ | ||||
0, /*tp_itemsize*/ | ||||
(destructor)listdir_stat_dealloc, /*tp_dealloc*/ | ||||
0, /*tp_print*/ | ||||
0, /*tp_getattr*/ | ||||
0, /*tp_setattr*/ | ||||
0, /*tp_compare*/ | ||||
0, /*tp_repr*/ | ||||
0, /*tp_as_number*/ | ||||
0, /*tp_as_sequence*/ | ||||
0, /*tp_as_mapping*/ | ||||
0, /*tp_hash */ | ||||
0, /*tp_call*/ | ||||
0, /*tp_str*/ | ||||
0, /*tp_getattro*/ | ||||
0, /*tp_setattro*/ | ||||
0, /*tp_as_buffer*/ | ||||
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ | ||||
"stat objects", /* tp_doc */ | ||||
0, /* tp_traverse */ | ||||
0, /* tp_clear */ | ||||
0, /* tp_richcompare */ | ||||
0, /* tp_weaklistoffset */ | ||||
0, /* tp_iter */ | ||||
0, /* tp_iternext */ | ||||
0, /* tp_methods */ | ||||
0, /* tp_members */ | ||||
listdir_stat_getsets, /* tp_getset */ | ||||
0, /* tp_base */ | ||||
0, /* tp_dict */ | ||||
0, /* tp_descr_get */ | ||||
0, /* tp_descr_set */ | ||||
0, /* tp_dictoffset */ | ||||
0, /* tp_init */ | ||||
0, /* tp_alloc */ | ||||
listdir_stat_new, /* tp_new */ | ||||
Bryan O'Sullivan
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r5396 | }; | ||
Matt Mackall
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r7031 | int entkind(struct dirent *ent) | ||
Matt Mackall
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r5425 | { | ||
Matt Mackall
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r7031 | #ifdef DT_REG | ||
switch (ent->d_type) { | ||||
case DT_REG: return S_IFREG; | ||||
case DT_DIR: return S_IFDIR; | ||||
case DT_LNK: return S_IFLNK; | ||||
case DT_BLK: return S_IFBLK; | ||||
case DT_CHR: return S_IFCHR; | ||||
case DT_FIFO: return S_IFIFO; | ||||
case DT_SOCK: return S_IFSOCK; | ||||
} | ||||
Bryan O'Sullivan
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r5463 | #endif | ||
Matt Mackall
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r7033 | return -1; | ||
Matt Mackall
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r5425 | } | ||
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r5396 | static PyObject *listdir(PyObject *self, PyObject *args, PyObject *kwargs) | ||
{ | ||||
Matt Mackall
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r7034 | static char *kwlist[] = { "path", "stat", "skip", NULL }; | ||
Matt Mackall
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r7031 | PyObject *statflag = NULL, *list, *elem, *stat, *ret = NULL; | ||
Matt Mackall
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r7034 | char fullpath[PATH_MAX + 10], *path, *skip = NULL; | ||
Matt Mackall
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r7033 | int pathlen, keepstat, kind, dfd = -1, err; | ||
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r7031 | struct stat st; | ||
struct dirent *ent; | ||||
DIR *dir; | ||||
Bryan O'Sullivan
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r5396 | |||
Matt Mackall
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r7034 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|Os:listdir", kwlist, | ||
&path, &pathlen, &statflag, &skip)) | ||||
Matt Mackall
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r7031 | goto error_parse; | ||
Matt Mackall
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r7034 | |||
Matt Mackall
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r7033 | if (pathlen >= PATH_MAX) | ||
goto error_parse; | ||||
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r7031 | |||
strncpy(fullpath, path, PATH_MAX); | ||||
fullpath[pathlen] = '/'; | ||||
keepstat = statflag && PyObject_IsTrue(statflag); | ||||
Bryan O'Sullivan
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r5396 | |||
Matt Mackall
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r7033 | #ifdef AT_SYMLINK_NOFOLLOW | ||
dfd = open(path, O_RDONLY); | ||||
if (dfd == -1) { | ||||
PyErr_SetFromErrnoWithFilename(PyExc_OSError, path); | ||||
goto error_parse; | ||||
} | ||||
dir = fdopendir(dfd); | ||||
#else | ||||
dir = opendir(path); | ||||
#endif | ||||
Matt Mackall
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r5421 | if (!dir) { | ||
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r7031 | PyErr_SetFromErrnoWithFilename(PyExc_OSError, path); | ||
goto error_dir; | ||||
} | ||||
Bryan O'Sullivan
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r5396 | |||
Matt Mackall
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r5421 | list = PyList_New(0); | ||
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r7031 | if (!list) | ||
goto error_list; | ||||
while ((ent = readdir(dir))) { | ||||
if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) | ||||
continue; | ||||
Giorgos Keramidas
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r5416 | |||
Matt Mackall
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r7031 | kind = entkind(ent); | ||
if (kind == -1 || keepstat) { | ||||
Matt Mackall
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r7033 | #ifdef AT_SYMLINK_NOFOLLOW | ||
err = fstatat(dfd, ent->d_name, &st, | ||||
AT_SYMLINK_NOFOLLOW); | ||||
#else | ||||
strncpy(fullpath + pathlen + 1, ent->d_name, | ||||
PATH_MAX - pathlen); | ||||
fullpath[PATH_MAX] = 0; | ||||
err = lstat(fullpath, &st); | ||||
#endif | ||||
Matt Mackall
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r7031 | if (err == -1) { | ||
strncpy(fullpath + pathlen + 1, ent->d_name, | ||||
PATH_MAX - pathlen); | ||||
fullpath[PATH_MAX] = 0; | ||||
PyErr_SetFromErrnoWithFilename(PyExc_OSError, | ||||
fullpath); | ||||
goto error; | ||||
} | ||||
kind = st.st_mode & S_IFMT; | ||||
} | ||||
Bryan O'Sullivan
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r5396 | |||
Matt Mackall
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r7034 | /* quit early? */ | ||
if (skip && kind == S_IFDIR && !strcmp(ent->d_name, skip)) { | ||||
ret = PyList_New(0); | ||||
goto error; | ||||
} | ||||
Matt Mackall
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r7031 | if (keepstat) { | ||
stat = PyObject_CallObject((PyObject *)&listdir_stat_type, NULL); | ||||
if (!stat) | ||||
goto error; | ||||
memcpy(&((struct listdir_stat *)stat)->st, &st, sizeof(st)); | ||||
elem = Py_BuildValue("siN", ent->d_name, kind, stat); | ||||
} else | ||||
elem = Py_BuildValue("si", ent->d_name, kind); | ||||
if (!elem) | ||||
goto error; | ||||
PyList_Append(list, elem); | ||||
Py_DECREF(elem); | ||||
} | ||||
Matt Mackall
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r5421 | |||
Matt Mackall
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r7031 | ret = list; | ||
Py_INCREF(ret); | ||||
Matt Mackall
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r5421 | |||
Matt Mackall
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r7031 | error: | ||
Py_DECREF(list); | ||||
error_list: | ||||
closedir(dir); | ||||
error_dir: | ||||
Matt Mackall
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r7033 | #ifdef AT_SYMLINK_NOFOLLOW | ||
close(dfd); | ||||
#endif | ||||
Matt Mackall
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r7031 | error_parse: | ||
return ret; | ||||
Matt Mackall
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r5421 | } | ||
Bryan O'Sullivan
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r5396 | |||
static char osutil_doc[] = "Native operating system services."; | ||||
static PyMethodDef methods[] = { | ||||
Matt Mackall
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r5421 | {"listdir", (PyCFunction)listdir, METH_VARARGS | METH_KEYWORDS, | ||
"list a directory\n"}, | ||||
{NULL, NULL} | ||||
Bryan O'Sullivan
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r5396 | }; | ||
PyMODINIT_FUNC initosutil(void) | ||||
{ | ||||
Matt Mackall
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r5421 | if (PyType_Ready(&listdir_stat_type) == -1) | ||
return; | ||||
Bryan O'Sullivan
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r5396 | |||
Matt Mackall
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r5421 | Py_InitModule3("osutil", methods, osutil_doc); | ||
Bryan O'Sullivan
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r5396 | } | ||