| 1 |
//@+leo-ver=4 |
| 2 |
//@+node:@file _fusemodule.c |
| 3 |
//@@language c |
| 4 |
/* |
| 5 |
Copyright (C) 2001 Jeff Epler <jepler@unpythonic.dhs.org> |
| 6 |
|
| 7 |
This program can be distributed under the terms of the GNU GPL. |
| 8 |
See the file COPYING. |
| 9 |
*/ |
| 10 |
|
| 11 |
//@+others |
| 12 |
//@+node:includes |
| 13 |
#include <Python.h> |
| 14 |
#include "fuse.h" |
| 15 |
#include <time.h> |
| 16 |
//@-node:includes |
| 17 |
//@+node:globals |
| 18 |
|
| 19 |
static PyObject *getattr_cb=NULL, *readlink_cb=NULL, *getdir_cb=NULL, |
| 20 |
*mknod_cb=NULL, *mkdir_cb=NULL, *unlink_cb=NULL, *rmdir_cb=NULL, |
| 21 |
*symlink_cb=NULL, *rename_cb=NULL, *link_cb=NULL, *chmod_cb=NULL, |
| 22 |
*chown_cb=NULL, *truncate_cb=NULL, *utime_cb=NULL, |
| 23 |
*open_cb=NULL, *read_cb=NULL, *write_cb=NULL, *release_cb=NULL, |
| 24 |
*statfs_cb=NULL, *fsync_cb=NULL |
| 25 |
; |
| 26 |
//@-node:globals |
| 27 |
//@+node:PROLOGUE |
| 28 |
#define PROLOGUE \ |
| 29 |
int ret = -EINVAL; \ |
| 30 |
if (!v) { PyErr_Print(); goto OUT; } \ |
| 31 |
if(v == Py_None) { ret = 0; goto OUT_DECREF; } \ |
| 32 |
if(PyInt_Check(v)) { ret = PyInt_AsLong(v); goto OUT_DECREF; } |
| 33 |
|
| 34 |
//@-node:PROLOGUE |
| 35 |
//@+node:EPILOGUE |
| 36 |
#define EPILOGUE \ |
| 37 |
OUT_DECREF: \ |
| 38 |
Py_DECREF(v); \ |
| 39 |
OUT: \ |
| 40 |
return ret; |
| 41 |
//@-node:EPILOGUE |
| 42 |
//@+node:getattr_func |
| 43 |
|
| 44 |
/* |
| 45 |
* Local Variables: |
| 46 |
* indent-tabs-mode: t |
| 47 |
* c-basic-offset: 8 |
| 48 |
* End: |
| 49 |
* Changed by David McNab (david@rebirthing.co.nz) to work with recent pythons. |
| 50 |
* Namely, replacing PyTuple_* with PySequence_*, and checking numerical values |
| 51 |
* with both PyInt_Check and PyLong_Check. |
| 52 |
*/ |
| 53 |
|
| 54 |
static int getattr_func(const char *path, struct stat *st) |
| 55 |
{ |
| 56 |
int i; |
| 57 |
PyObject *v = PyObject_CallFunction(getattr_cb, "s", path); |
| 58 |
PROLOGUE |
| 59 |
|
| 60 |
if(!PySequence_Check(v)) { goto OUT_DECREF; } |
| 61 |
if(PySequence_Size(v) < 10) { goto OUT_DECREF; } |
| 62 |
for(i=0; i<10; i++) |
| 63 |
{ |
| 64 |
PyObject *tmp = PySequence_GetItem(v, i); |
| 65 |
if (!(PyInt_Check(tmp) || PyLong_Check(tmp))) goto OUT_DECREF; |
| 66 |
} |
| 67 |
|
| 68 |
st->st_mode = PyInt_AsLong(PySequence_GetItem(v, 0)); |
| 69 |
st->st_ino = PyInt_AsLong(PySequence_GetItem(v, 1)); |
| 70 |
st->st_dev = PyInt_AsLong(PySequence_GetItem(v, 2)); |
| 71 |
st->st_nlink= PyInt_AsLong(PySequence_GetItem(v, 3)); |
| 72 |
st->st_uid = PyInt_AsLong(PySequence_GetItem(v, 4)); |
| 73 |
st->st_gid = PyInt_AsLong(PySequence_GetItem(v, 5)); |
| 74 |
st->st_size = PyInt_AsLong(PySequence_GetItem(v, 6)); |
| 75 |
st->st_atime= PyInt_AsLong(PySequence_GetItem(v, 7)); |
| 76 |
st->st_mtime= PyInt_AsLong(PySequence_GetItem(v, 8)); |
| 77 |
st->st_ctime= PyInt_AsLong(PySequence_GetItem(v, 9)); |
| 78 |
|
| 79 |
/* Fill in fields not provided by Python lstat() */ |
| 80 |
st->st_blksize= 4096; |
| 81 |
st->st_blocks= (st->st_size + 511)/512; |
| 82 |
st->st_ino = 0; |
| 83 |
|
| 84 |
ret = 0; |
| 85 |
EPILOGUE |
| 86 |
} |
| 87 |
|
| 88 |
//@-node:getattr_func |
| 89 |
//@+node:readlink_func |
| 90 |
|
| 91 |
static int readlink_func(const char *path, char *link, size_t size) |
| 92 |
{ |
| 93 |
PyObject *v = PyObject_CallFunction(readlink_cb, "s", path); |
| 94 |
char *s; |
| 95 |
PROLOGUE |
| 96 |
|
| 97 |
if(!PyString_Check(v)) { ret = -EINVAL; goto OUT_DECREF; } |
| 98 |
s = PyString_AsString(v); |
| 99 |
strncpy(link, s, size); |
| 100 |
link[size-1] = '\0'; |
| 101 |
ret = 0; |
| 102 |
|
| 103 |
EPILOGUE |
| 104 |
} |
| 105 |
//@-node:readlink_func |
| 106 |
//@+node:getdir_add_entry |
| 107 |
|
| 108 |
static int getdir_add_entry(PyObject *w, fuse_dirh_t dh, fuse_dirfil_t df) |
| 109 |
{ |
| 110 |
PyObject *o0; |
| 111 |
PyObject *o1; |
| 112 |
int ret = -EINVAL; |
| 113 |
|
| 114 |
if(!PySequence_Check(w)) { |
| 115 |
printf("getdir item not sequence\n"); |
| 116 |
goto out; |
| 117 |
} |
| 118 |
if(PySequence_Length(w) != 2) { |
| 119 |
printf("getdir item not len 2\n"); |
| 120 |
goto out; |
| 121 |
} |
| 122 |
o0 = PySequence_GetItem(w, 0); |
| 123 |
o1 = PySequence_GetItem(w, 1); |
| 124 |
|
| 125 |
if(!PyString_Check(o0)) { |
| 126 |
printf("getdir item[0] not string\n"); |
| 127 |
goto out_decref; |
| 128 |
} |
| 129 |
if(!PyInt_Check(o1)) { |
| 130 |
printf("getdir item[1] not int\n"); |
| 131 |
goto out_decref; |
| 132 |
} |
| 133 |
|
| 134 |
ret = df(dh, PyString_AsString(o0), PyInt_AsLong(o1)); |
| 135 |
|
| 136 |
out_decref: |
| 137 |
Py_DECREF(o0); |
| 138 |
Py_DECREF(o1); |
| 139 |
|
| 140 |
out: |
| 141 |
return ret; |
| 142 |
} |
| 143 |
//@-node:getdir_add_entry |
| 144 |
//@+node:getdir_func |
| 145 |
|
| 146 |
static int getdir_func(const char *path, fuse_dirh_t dh, fuse_dirfil_t df) |
| 147 |
{ |
| 148 |
PyObject *v = PyObject_CallFunction(getdir_cb, "s", path); |
| 149 |
int i; |
| 150 |
PROLOGUE |
| 151 |
|
| 152 |
if(!PySequence_Check(v)) { |
| 153 |
printf("getdir_func not sequence\n"); |
| 154 |
goto OUT_DECREF; |
| 155 |
} |
| 156 |
for(i=0; i < PySequence_Length(v); i++) { |
| 157 |
PyObject *w = PySequence_GetItem(v, i); |
| 158 |
ret = getdir_add_entry(w, dh, df); |
| 159 |
Py_DECREF(w); |
| 160 |
if(ret != 0) |
| 161 |
goto OUT_DECREF; |
| 162 |
} |
| 163 |
ret = 0; |
| 164 |
|
| 165 |
EPILOGUE |
| 166 |
} |
| 167 |
//@-node:getdir_func |
| 168 |
//@+node:mknod_func |
| 169 |
|
| 170 |
static int mknod_func(const char *path, mode_t m, dev_t d) |
| 171 |
{ |
| 172 |
PyObject *v = PyObject_CallFunction(mknod_cb, "sii", path, m, d); |
| 173 |
PROLOGUE |
| 174 |
EPILOGUE |
| 175 |
} |
| 176 |
//@-node:mknod_func |
| 177 |
//@+node:mkdir_func |
| 178 |
|
| 179 |
static int mkdir_func(const char *path, mode_t m) |
| 180 |
{ |
| 181 |
PyObject *v = PyObject_CallFunction(mkdir_cb, "si", path, m); |
| 182 |
PROLOGUE |
| 183 |
EPILOGUE |
| 184 |
} |
| 185 |
//@-node:mkdir_func |
| 186 |
//@+node:unlink_func |
| 187 |
|
| 188 |
static int unlink_func(const char *path) |
| 189 |
{ |
| 190 |
PyObject *v = PyObject_CallFunction(unlink_cb, "s", path); |
| 191 |
PROLOGUE |
| 192 |
EPILOGUE |
| 193 |
} |
| 194 |
//@-node:unlink_func |
| 195 |
//@+node:rmdir_func |
| 196 |
|
| 197 |
static int rmdir_func(const char *path) |
| 198 |
{ |
| 199 |
PyObject *v = PyObject_CallFunction(rmdir_cb, "s", path); |
| 200 |
PROLOGUE |
| 201 |
EPILOGUE |
| 202 |
} |
| 203 |
//@-node:rmdir_func |
| 204 |
//@+node:symlink_func |
| 205 |
|
| 206 |
static int symlink_func(const char *path, const char *path1) |
| 207 |
{ |
| 208 |
PyObject *v = PyObject_CallFunction(symlink_cb, "ss", path, path1); |
| 209 |
PROLOGUE |
| 210 |
EPILOGUE |
| 211 |
} |
| 212 |
//@-node:symlink_func |
| 213 |
//@+node:rename_func |
| 214 |
|
| 215 |
static int rename_func(const char *path, const char *path1) |
| 216 |
{ |
| 217 |
PyObject *v = PyObject_CallFunction(rename_cb, "ss", path, path1); |
| 218 |
PROLOGUE |
| 219 |
EPILOGUE |
| 220 |
} |
| 221 |
//@-node:rename_func |
| 222 |
//@+node:link_func |
| 223 |
|
| 224 |
static int link_func(const char *path, const char *path1) |
| 225 |
{ |
| 226 |
PyObject *v = PyObject_CallFunction(link_cb, "ss", path, path1); |
| 227 |
PROLOGUE |
| 228 |
EPILOGUE |
| 229 |
} |
| 230 |
//@-node:link_func |
| 231 |
//@+node:chmod_func |
| 232 |
|
| 233 |
static int chmod_func(const char *path, mode_t m) |
| 234 |
{ |
| 235 |
PyObject *v = PyObject_CallFunction(chmod_cb, "si", path, m); |
| 236 |
PROLOGUE |
| 237 |
EPILOGUE |
| 238 |
} |
| 239 |
//@-node:chmod_func |
| 240 |
//@+node:chown_func |
| 241 |
|
| 242 |
static int chown_func(const char *path, uid_t u, gid_t g) |
| 243 |
{ |
| 244 |
PyObject *v = PyObject_CallFunction(chown_cb, "sii", path, u, g); |
| 245 |
PROLOGUE |
| 246 |
EPILOGUE |
| 247 |
} |
| 248 |
//@-node:chown_func |
| 249 |
//@+node:truncate_func |
| 250 |
|
| 251 |
static int truncate_func(const char *path, off_t o) |
| 252 |
{ |
| 253 |
PyObject *v = PyObject_CallFunction(truncate_cb, "si", path, o); |
| 254 |
PROLOGUE |
| 255 |
EPILOGUE |
| 256 |
} |
| 257 |
//@-node:truncate_func |
| 258 |
//@+node:utime_func |
| 259 |
|
| 260 |
static int utime_func(const char *path, struct utimbuf *u) { |
| 261 |
int actime = u ? u->actime : time(NULL); |
| 262 |
int modtime = u ? u->modtime : actime; |
| 263 |
PyObject *v = PyObject_CallFunction(utime_cb, "s(ii)", |
| 264 |
path, actime, modtime); |
| 265 |
PROLOGUE |
| 266 |
EPILOGUE |
| 267 |
} |
| 268 |
//@-node:utime_func |
| 269 |
//@+node:read_func |
| 270 |
|
| 271 |
static int read_func(const char *path, char *buf, size_t s, off_t off) |
| 272 |
{ |
| 273 |
PyObject *v = PyObject_CallFunction(read_cb, "sii", path, s, off); |
| 274 |
PROLOGUE |
| 275 |
if(PyString_Check(v)) { |
| 276 |
if(PyString_Size(v) > s) goto OUT_DECREF; |
| 277 |
memcpy(buf, PyString_AsString(v), PyString_Size(v)); |
| 278 |
ret = PyString_Size(v); |
| 279 |
} |
| 280 |
EPILOGUE |
| 281 |
} |
| 282 |
//@-node:read_func |
| 283 |
//@+node:write_func |
| 284 |
|
| 285 |
static int write_func(const char *path, const char *buf, size_t t, off_t off) |
| 286 |
{ |
| 287 |
PyObject *v = PyObject_CallFunction(write_cb,"ss#i", path, buf, t, off); |
| 288 |
PROLOGUE |
| 289 |
EPILOGUE |
| 290 |
} |
| 291 |
//@-node:write_func |
| 292 |
//@+node:open_func |
| 293 |
|
| 294 |
static int open_func(const char *path, int mode) |
| 295 |
{ |
| 296 |
PyObject *v = PyObject_CallFunction(open_cb, "si", path, mode); |
| 297 |
PROLOGUE |
| 298 |
printf("open_func: path=%s\n", path); |
| 299 |
EPILOGUE |
| 300 |
} |
| 301 |
//@-node:open_func |
| 302 |
//@+node:release_func |
| 303 |
static int release_func(const char *path, int flags) |
| 304 |
{ |
| 305 |
PyObject *v = PyObject_CallFunction(release_cb, "si", path, flags); |
| 306 |
PROLOGUE |
| 307 |
//printf("release_func: path=%s flags=%d\n", path, flags); |
| 308 |
EPILOGUE |
| 309 |
} |
| 310 |
//@-node:release_func |
| 311 |
//@+node:statfs_func |
| 312 |
static int statfs_func(struct fuse_statfs *fst) |
| 313 |
{ |
| 314 |
int i; |
| 315 |
long retvalues[6]; |
| 316 |
PyObject *v = PyObject_CallFunction(statfs_cb, ""); |
| 317 |
PROLOGUE |
| 318 |
|
| 319 |
if (!PySequence_Check(v)) |
| 320 |
{ goto OUT_DECREF; } |
| 321 |
if (PySequence_Size(v) < 6) |
| 322 |
{ goto OUT_DECREF; } |
| 323 |
for(i=0; i<6; i++) |
| 324 |
{ |
| 325 |
PyObject *tmp = PySequence_GetItem(v, i); |
| 326 |
retvalues[i] = PyInt_Check(tmp) |
| 327 |
? PyInt_AsLong(tmp) |
| 328 |
: (PyLong_Check(tmp) |
| 329 |
? PyLong_AsLong(tmp) |
| 330 |
: 0); |
| 331 |
} |
| 332 |
|
| 333 |
fst->block_size = retvalues[0]; |
| 334 |
fst->blocks = retvalues[1]; |
| 335 |
fst->blocks_free = retvalues[2]; |
| 336 |
fst->files = retvalues[3]; |
| 337 |
fst->files_free = retvalues[4]; |
| 338 |
fst->namelen = retvalues[5]; |
| 339 |
ret = 0; |
| 340 |
|
| 341 |
#ifdef IGNORE_THIS |
| 342 |
printf("block_size=%ld, blocks=%ld, blocks_free=%ld, files=%ld, files_free=%ld, namelen=%ld\n", |
| 343 |
retvalues[0], retvalues[1], retvalues[2], retvalues[3], retvalues[4], retvalues[5]); |
| 344 |
#endif |
| 345 |
|
| 346 |
EPILOGUE |
| 347 |
|
| 348 |
} |
| 349 |
|
| 350 |
//@-node:statfs_func |
| 351 |
//@+node:fsync_func |
| 352 |
static int fsync_func(const char *path, int isfsyncfile) |
| 353 |
{ |
| 354 |
PyObject *v = PyObject_CallFunction(fsync_cb, "si", path, isfsyncfile); |
| 355 |
PROLOGUE |
| 356 |
EPILOGUE |
| 357 |
} |
| 358 |
|
| 359 |
//@-node:fsync_func |
| 360 |
//@+node:process_cmd |
| 361 |
|
| 362 |
static void process_cmd(struct fuse *f, struct fuse_cmd *cmd, void *data) |
| 363 |
{ |
| 364 |
PyInterpreterState *interp = (PyInterpreterState *) data; |
| 365 |
PyThreadState *state; |
| 366 |
|
| 367 |
PyEval_AcquireLock(); |
| 368 |
state = PyThreadState_New(interp); |
| 369 |
PyThreadState_Swap(state); |
| 370 |
__fuse_process_cmd(f, cmd); |
| 371 |
PyThreadState_Clear(state); |
| 372 |
PyThreadState_Swap(NULL); |
| 373 |
PyThreadState_Delete(state); |
| 374 |
PyEval_ReleaseLock(); |
| 375 |
} |
| 376 |
//@-node:process_cmd |
| 377 |
//@+node:pyfuse_loop_mt |
| 378 |
|
| 379 |
static void pyfuse_loop_mt(struct fuse *f) |
| 380 |
{ |
| 381 |
PyInterpreterState *interp; |
| 382 |
PyThreadState *save; |
| 383 |
|
| 384 |
PyEval_InitThreads(); |
| 385 |
interp = PyThreadState_Get()->interp; |
| 386 |
save = PyEval_SaveThread(); |
| 387 |
__fuse_loop_mt(f, process_cmd, interp); |
| 388 |
/* Not yet reached: */ |
| 389 |
PyEval_RestoreThread(save); |
| 390 |
} |
| 391 |
//@-node:pyfuse_loop_mt |
| 392 |
//@+node:Fuse_main |
| 393 |
|
| 394 |
|
| 395 |
static PyObject * |
| 396 |
Fuse_main(PyObject *self, PyObject *args, PyObject *kw) |
| 397 |
{ |
| 398 |
int flags=0; |
| 399 |
int multithreaded=0; |
| 400 |
static struct fuse *fuse=NULL; |
| 401 |
|
| 402 |
struct fuse_operations op; |
| 403 |
|
| 404 |
static char *kwlist[] = { |
| 405 |
"getattr", "readlink", "getdir", "mknod", |
| 406 |
"mkdir", "unlink", "rmdir", "symlink", "rename", |
| 407 |
"link", "chmod", "chown", "truncate", "utime", |
| 408 |
"open", "read", "write", "release", "statfs", "fsync", |
| 409 |
"flags", "multithreaded", NULL}; |
| 410 |
|
| 411 |
memset(&op, 0, sizeof(op)); |
| 412 |
|
| 413 |
if (!PyArg_ParseTupleAndKeywords(args, kw, "|OOOOOOOOOOOOOOOOOOOOii", |
| 414 |
kwlist, &getattr_cb, &readlink_cb, &getdir_cb, &mknod_cb, |
| 415 |
&mkdir_cb, &unlink_cb, &rmdir_cb, &symlink_cb, &rename_cb, |
| 416 |
&link_cb, &chmod_cb, &chown_cb, &truncate_cb, &utime_cb, |
| 417 |
&open_cb, &read_cb, &write_cb, &release_cb, &statfs_cb, &fsync_cb, |
| 418 |
&flags, &multithreaded)) |
| 419 |
return NULL; |
| 420 |
|
| 421 |
#define DO_ONE_ATTR(name) if(name ## _cb) { Py_INCREF(name ## _cb); op.name = name ## _func; } else { op.name = NULL; } |
| 422 |
|
| 423 |
DO_ONE_ATTR(getattr); |
| 424 |
DO_ONE_ATTR(readlink); |
| 425 |
DO_ONE_ATTR(getdir); |
| 426 |
DO_ONE_ATTR(mknod); |
| 427 |
DO_ONE_ATTR(mkdir); |
| 428 |
DO_ONE_ATTR(unlink); |
| 429 |
DO_ONE_ATTR(rmdir); |
| 430 |
DO_ONE_ATTR(symlink); |
| 431 |
DO_ONE_ATTR(rename); |
| 432 |
DO_ONE_ATTR(link); |
| 433 |
DO_ONE_ATTR(chmod); |
| 434 |
DO_ONE_ATTR(chown); |
| 435 |
DO_ONE_ATTR(truncate); |
| 436 |
DO_ONE_ATTR(utime); |
| 437 |
DO_ONE_ATTR(open); |
| 438 |
DO_ONE_ATTR(read); |
| 439 |
DO_ONE_ATTR(write); |
| 440 |
DO_ONE_ATTR(release); |
| 441 |
DO_ONE_ATTR(statfs); |
| 442 |
DO_ONE_ATTR(fsync); |
| 443 |
|
| 444 |
fuse = fuse_new(0, flags, &op); |
| 445 |
if(multithreaded) |
| 446 |
pyfuse_loop_mt(fuse); |
| 447 |
else |
| 448 |
fuse_loop(fuse); |
| 449 |
|
| 450 |
//printf("Fuse_main: called\n"); |
| 451 |
|
| 452 |
Py_INCREF(Py_None); |
| 453 |
return Py_None; |
| 454 |
} |
| 455 |
//@-node:Fuse_main |
| 456 |
//@+node:DL_EXPORT |
| 457 |
//@+at |
| 458 |
//@nonl |
| 459 |
// List of functions defined in the module |
| 460 |
//@-at |
| 461 |
//@@c |
| 462 |
|
| 463 |
static PyMethodDef Fuse_methods[] = { |
| 464 |
{"main", (PyCFunction)Fuse_main, METH_VARARGS|METH_KEYWORDS}, |
| 465 |
{NULL, NULL} /* sentinel */ |
| 466 |
}; |
| 467 |
|
| 468 |
|
| 469 |
/* Initialization function for the module (*must* be called init_fuse) */ |
| 470 |
|
| 471 |
DL_EXPORT(void) |
| 472 |
init_fuse(void) |
| 473 |
{ |
| 474 |
PyObject *m, *d; |
| 475 |
static PyObject *ErrorObject; |
| 476 |
|
| 477 |
/* Create the module and add the functions */ |
| 478 |
m = Py_InitModule("_fuse", Fuse_methods); |
| 479 |
|
| 480 |
/* Add some symbolic constants to the module */ |
| 481 |
d = PyModule_GetDict(m); |
| 482 |
ErrorObject = PyErr_NewException("fuse.error", NULL, NULL); |
| 483 |
PyDict_SetItemString(d, "error", ErrorObject); |
| 484 |
PyDict_SetItemString(d, "DEBUG", PyInt_FromLong(FUSE_DEBUG)); |
| 485 |
} |
| 486 |
//@-node:DL_EXPORT |
| 487 |
//@-others |
| 488 |
|
| 489 |
//@-node:@file _fusemodule.c |
| 490 |
//@-leo |
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