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/* ----------------------------------------------------------------------- *
*
* Copyright 2002 Ben Escoto
*
* This file is part of rdiff-backup.
*
* rdiff-backup is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, Inc., 675 Mass Ave,
* Cambridge MA 02139, USA; either version 2 of the License, or (at
* your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <Python.h>
#include <errno.h>
/* choose the appropriate stat and fstat functions and return structs */
/* This code taken from Python's posixmodule.c */
#undef STAT
#if defined(MS_WIN64) || defined(MS_WIN32)
# define STAT _stati64
# define FSTAT _fstati64
# define STRUCT_STAT struct _stati64
#else
# define STAT stat
# define FSTAT fstat
# define STRUCT_STAT struct stat
#endif
static PyObject *UnknownFileTypeError;
static PyObject *c_make_file_dict(PyObject *self, PyObject *args);
static PyObject *long2str(PyObject *self, PyObject *args);
static PyObject *str2long(PyObject *self, PyObject *args);
/* Turn a stat structure into a python dictionary. The preprocessor
stuff taken from Python's posixmodule.c */
static PyObject *c_make_file_dict(self, args)
PyObject *self;
PyObject *args;
{
PyObject *size, *inode, *mtime, *atime, *devloc, *return_val;
char *filename, filetype[5];
STRUCT_STAT sbuf;
long int mode, perms;
int res;
if (!PyArg_ParseTuple(args, "s", &filename)) return NULL;
Py_BEGIN_ALLOW_THREADS
res = lstat(filename, &sbuf);
Py_END_ALLOW_THREADS
if (res != 0) {
if (errno == ENOENT || errno == ENOTDIR)
return Py_BuildValue("{s:s}", "type", NULL);
else {
PyErr_SetFromErrnoWithFilename(PyExc_OSError, filename);
return NULL;
}
}
#ifdef HAVE_LARGEFILE_SUPPORT
size = PyLong_FromLongLong((LONG_LONG)sbuf.st_size);
inode = PyLong_FromLongLong((LONG_LONG)sbuf.st_ino);
#else
size = PyInt_FromLong(sbuf.st_size);
inode = PyInt_FromLong((long)sbuf.st_ino);
#endif
mode = (long)sbuf.st_mode;
perms = mode & 07777;
#if defined(HAVE_LONG_LONG) && !defined(MS_WINDOWS)
devloc = PyLong_FromLongLong((LONG_LONG)sbuf.st_dev);
#else
devloc = PyInt_FromLong((long)sbuf.st_dev);
#endif
#if SIZEOF_TIME_T > SIZEOF_LONG
mtime = PyLong_FromLongLong((LONG_LONG)sbuf.st_mtime);
atime = PyLong_FromLongLong((LONG_LONG)sbuf.st_atime);
#else
mtime = PyInt_FromLong((long)sbuf.st_mtime);
atime = PyInt_FromLong((long)sbuf.st_atime);
#endif
/* Build return dictionary from stat struct */
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISSOCK(mode) || S_ISFIFO(mode)) {
/* Regular files, directories, sockets, and fifos */
if S_ISREG(mode) strcpy(filetype, "reg");
else if S_ISDIR(mode) strcpy(filetype, "dir");
else if S_ISSOCK(mode) strcpy(filetype, "sock");
else strcpy(filetype, "fifo");
return_val = Py_BuildValue("{s:s,s:O,s:l,s:l,s:l,s:O,s:O,s:l,s:O,s:O}",
"type", filetype,
"size", size,
"perms", perms,
"uid", (long)sbuf.st_uid,
"gid", (long)sbuf.st_gid,
"inode", inode,
"devloc", devloc,
"nlink", (long)sbuf.st_nlink,
"mtime", mtime,
"atime", atime);
} else if S_ISLNK(mode) {
/* Symbolic links */
char linkname[1024];
int len_link = readlink(filename, linkname, 1023);
if (len_link < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return_val = NULL;
} else {
linkname[len_link] = '\0';
return_val = Py_BuildValue("{s:s,s:O,s:l,s:l,s:l,s:O,s:O,s:l,s:s}",
"type", "sym",
"size", size,
"perms", perms,
"uid", (long)sbuf.st_uid,
"gid", (long)sbuf.st_gid,
"inode", inode,
"devloc", devloc,
"nlink", (long)sbuf.st_nlink,
"linkname", linkname);
}
} else if (S_ISCHR(mode) || S_ISBLK(mode)) {
/* Device files */
char devtype[2];
#if defined(HAVE_LONG_LONG) && !defined(MS_WINDOWS)
LONG_LONG devnums = (LONG_LONG)sbuf.st_rdev;
PyObject *major_num = PyLong_FromLongLong(devnums >> 8);
#else
long int devnums = (long)sbuf.st_dev;
PyObject *major_num = PyInt_FromLong(devnums >> 8);
#endif
int minor_num = (int)(devnums & 0xff);
if S_ISCHR(mode) strcpy(devtype, "c");
else strcpy(devtype, "b");
return_val = Py_BuildValue("{s:s,s:O,s:l,s:l,s:l,s:O,s:O,s:l,s:N}",
"type", "dev",
"size", size,
"perms", perms,
"uid", (long)sbuf.st_uid,
"gid", (long)sbuf.st_gid,
"inode", inode,
"devloc", devloc,
"nlink", (long)sbuf.st_nlink,
"devnums", Py_BuildValue("(s,O,i)", devtype,
major_num, minor_num));
Py_DECREF(major_num);
} else {
/* Unrecognized file type - raise exception */
PyErr_SetString(UnknownFileTypeError, filename);
return_val = NULL;
}
Py_DECREF(size);
Py_DECREF(inode);
Py_DECREF(devloc);
Py_DECREF(mtime);
Py_DECREF(atime);
return return_val;
}
/* Convert python long into 7 byte string */
static PyObject *long2str(self, args)
PyObject *self;
PyObject *args;
{
unsigned char s[7];
PyLongObject *pylong;
PyObject *return_val;
if (!PyArg_ParseTuple(args, "O!", &PyLong_Type, &pylong)) return NULL;
if (_PyLong_AsByteArray(pylong, s, 7, 0, 0) != 0) return NULL;
else return Py_BuildValue("s#", s, 7);
return return_val;
}
/* Reverse of above; convert 7 byte string into python long */
static PyObject *str2long(self, args)
PyObject *self;
PyObject *args;
{
unsigned char *s;
int ssize;
if (!PyArg_ParseTuple(args, "s#", &s, &ssize)) return NULL;
if (ssize != 7) {
PyErr_SetString(PyExc_TypeError, "Single argument must be 7 char string");
return NULL;
}
return _PyLong_FromByteArray(s, 7, 0, 0);
}
static PyMethodDef CMethods[] = {
{"make_file_dict", c_make_file_dict, METH_VARARGS,
"Make dictionary from file stat"},
{"long2str", long2str, METH_VARARGS, "Convert python long to 7 byte string"},
{"str2long", str2long, METH_VARARGS, "Convert 7 byte string to python long"},
{NULL, NULL, 0, NULL}
};
void initC(void)
{
PyObject *m, *d;
m = Py_InitModule("C", CMethods);
d = PyModule_GetDict(m);
UnknownFileTypeError = PyErr_NewException("C.UnknownFileTypeError",
NULL, NULL);
PyDict_SetItemString(d, "UnknownFileTypeError", UnknownFileTypeError);
}
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