| 1 | r"""OS routines for Mac, DOS, NT, or Posix depending on what system we're on. |
| 2 | |
| 3 | This exports: |
| 4 | - all functions from posix, nt, os2, mac, or ce, e.g. unlink, stat, etc. |
| 5 | - os.path is one of the modules posixpath, ntpath, or macpath |
| 6 | - os.name is 'posix', 'nt', 'os2', 'mac', 'ce' or 'riscos' |
| 7 | - os.curdir is a string representing the current directory ('.' or ':') |
| 8 | - os.pardir is a string representing the parent directory ('..' or '::') |
| 9 | - os.sep is the (or a most common) pathname separator ('/' or ':' or '\\') |
| 10 | - os.extsep is the extension separator ('.' or '/') |
| 11 | - os.altsep is the alternate pathname separator (None or '/') |
| 12 | - os.pathsep is the component separator used in $PATH etc |
| 13 | - os.linesep is the line separator in text files ('\r' or '\n' or '\r\n') |
| 14 | - os.defpath is the default search path for executables |
| 15 | - os.devnull is the file path of the null device ('/dev/null', etc.) |
| 16 | |
| 17 | Programs that import and use 'os' stand a better chance of being |
| 18 | portable between different platforms. Of course, they must then |
| 19 | only use functions that are defined by all platforms (e.g., unlink |
| 20 | and opendir), and leave all pathname manipulation to os.path |
| 21 | (e.g., split and join). |
| 22 | """ |
| 23 | |
| 24 | #' |
| 25 | |
| 26 | import sys |
| 27 | |
| 28 | _names = sys.builtin_module_names |
| 29 | |
| 30 | # Note: more names are added to __all__ later. |
| 31 | __all__ = ["altsep", "curdir", "pardir", "sep", "pathsep", "linesep", |
| 32 | "defpath", "name", "path", "devnull"] |
| 33 | |
| 34 | def _get_exports_list(module): |
| 35 | try: |
| 36 | return list(module.__all__) |
| 37 | except AttributeError: |
| 38 | return [n for n in dir(module) if n[0] != '_'] |
| 39 | |
| 40 | if 'posix' in _names: |
| 41 | name = 'posix' |
| 42 | linesep = '\n' |
| 43 | from posix import * |
| 44 | try: |
| 45 | from posix import _exit |
| 46 | except ImportError: |
| 47 | pass |
| 48 | import posixpath as path |
| 49 | |
| 50 | import posix |
| 51 | __all__.extend(_get_exports_list(posix)) |
| 52 | del posix |
| 53 | |
| 54 | elif 'nt' in _names: |
| 55 | name = 'nt' |
| 56 | linesep = '\r\n' |
| 57 | from nt import * |
| 58 | try: |
| 59 | from nt import _exit |
| 60 | except ImportError: |
| 61 | pass |
| 62 | import ntpath as path |
| 63 | |
| 64 | import nt |
| 65 | __all__.extend(_get_exports_list(nt)) |
| 66 | del nt |
| 67 | |
| 68 | elif 'os2' in _names: |
| 69 | name = 'os2' |
| 70 | linesep = '\r\n' |
| 71 | from os2 import * |
| 72 | try: |
| 73 | from os2 import _exit |
| 74 | except ImportError: |
| 75 | pass |
| 76 | if sys.version.find('EMX GCC') == -1: |
| 77 | import ntpath as path |
| 78 | else: |
| 79 | import os2emxpath as path |
| 80 | from _emx_link import link |
| 81 | |
| 82 | import os2 |
| 83 | __all__.extend(_get_exports_list(os2)) |
| 84 | del os2 |
| 85 | |
| 86 | elif 'mac' in _names: |
| 87 | name = 'mac' |
| 88 | linesep = '\r' |
| 89 | from mac import * |
| 90 | try: |
| 91 | from mac import _exit |
| 92 | except ImportError: |
| 93 | pass |
| 94 | import macpath as path |
| 95 | |
| 96 | import mac |
| 97 | __all__.extend(_get_exports_list(mac)) |
| 98 | del mac |
| 99 | |
| 100 | elif 'ce' in _names: |
| 101 | name = 'ce' |
| 102 | linesep = '\r\n' |
| 103 | from ce import * |
| 104 | try: |
| 105 | from ce import _exit |
| 106 | except ImportError: |
| 107 | pass |
| 108 | # We can use the standard Windows path. |
| 109 | import ntpath as path |
| 110 | |
| 111 | import ce |
| 112 | __all__.extend(_get_exports_list(ce)) |
| 113 | del ce |
| 114 | |
| 115 | elif 'riscos' in _names: |
| 116 | name = 'riscos' |
| 117 | linesep = '\n' |
| 118 | from riscos import * |
| 119 | try: |
| 120 | from riscos import _exit |
| 121 | except ImportError: |
| 122 | pass |
| 123 | import riscospath as path |
| 124 | |
| 125 | import riscos |
| 126 | __all__.extend(_get_exports_list(riscos)) |
| 127 | del riscos |
| 128 | |
| 129 | else: |
| 130 | raise ImportError, 'no os specific module found' |
| 131 | |
| 132 | sys.modules['os.path'] = path |
| 133 | from os.path import (curdir, pardir, sep, pathsep, defpath, extsep, altsep, |
| 134 | devnull) |
| 135 | |
| 136 | del _names |
| 137 | |
| 138 | #' |
| 139 | |
| 140 | # Super directory utilities. |
| 141 | # (Inspired by Eric Raymond; the doc strings are mostly his) |
| 142 | |
| 143 | def makedirs(name, mode=0777): |
| 144 | """makedirs(path [, mode=0777]) |
| 145 | |
| 146 | Super-mkdir; create a leaf directory and all intermediate ones. |
| 147 | Works like mkdir, except that any intermediate path segment (not |
| 148 | just the rightmost) will be created if it does not exist. This is |
| 149 | recursive. |
| 150 | |
| 151 | """ |
| 152 | head, tail = path.split(name) |
| 153 | if not tail: |
| 154 | head, tail = path.split(head) |
| 155 | if head and tail and not path.exists(head): |
| 156 | makedirs(head, mode) |
| 157 | if tail == curdir: # xxx/newdir/. exists if xxx/newdir exists |
| 158 | return |
| 159 | mkdir(name, mode) |
| 160 | |
| 161 | def removedirs(name): |
| 162 | """removedirs(path) |
| 163 | |
| 164 | Super-rmdir; remove a leaf directory and empty all intermediate |
| 165 | ones. Works like rmdir except that, if the leaf directory is |
| 166 | successfully removed, directories corresponding to rightmost path |
| 167 | segments will be pruned away until either the whole path is |
| 168 | consumed or an error occurs. Errors during this latter phase are |
| 169 | ignored -- they generally mean that a directory was not empty. |
| 170 | |
| 171 | """ |
| 172 | rmdir(name) |
| 173 | head, tail = path.split(name) |
| 174 | if not tail: |
| 175 | head, tail = path.split(head) |
| 176 | while head and tail: |
| 177 | try: |
| 178 | rmdir(head) |
| 179 | except error: |
| 180 | break |
| 181 | head, tail = path.split(head) |
| 182 | |
| 183 | def renames(old, new): |
| 184 | """renames(old, new) |
| 185 | |
| 186 | Super-rename; create directories as necessary and delete any left |
| 187 | empty. Works like rename, except creation of any intermediate |
| 188 | directories needed to make the new pathname good is attempted |
| 189 | first. After the rename, directories corresponding to rightmost |
| 190 | path segments of the old name will be pruned way until either the |
| 191 | whole path is consumed or a nonempty directory is found. |
| 192 | |
| 193 | Note: this function can fail with the new directory structure made |
| 194 | if you lack permissions needed to unlink the leaf directory or |
| 195 | file. |
| 196 | |
| 197 | """ |
| 198 | head, tail = path.split(new) |
| 199 | if head and tail and not path.exists(head): |
| 200 | makedirs(head) |
| 201 | rename(old, new) |
| 202 | head, tail = path.split(old) |
| 203 | if head and tail: |
| 204 | try: |
| 205 | removedirs(head) |
| 206 | except error: |
| 207 | pass |
| 208 | |
| 209 | __all__.extend(["makedirs", "removedirs", "renames"]) |
| 210 | |
| 211 | def walk(top, topdown=True, onerror=None): |
| 212 | """Directory tree generator. |
| 213 | |
| 214 | For each directory in the directory tree rooted at top (including top |
| 215 | itself, but excluding '.' and '..'), yields a 3-tuple |
| 216 | |
| 217 | dirpath, dirnames, filenames |
| 218 | |
| 219 | dirpath is a string, the path to the directory. dirnames is a list of |
| 220 | the names of the subdirectories in dirpath (excluding '.' and '..'). |
| 221 | filenames is a list of the names of the non-directory files in dirpath. |
| 222 | Note that the names in the lists are just names, with no path components. |
| 223 | To get a full path (which begins with top) to a file or directory in |
| 224 | dirpath, do os.path.join(dirpath, name). |
| 225 | |
| 226 | If optional arg 'topdown' is true or not specified, the triple for a |
| 227 | directory is generated before the triples for any of its subdirectories |
| 228 | (directories are generated top down). If topdown is false, the triple |
| 229 | for a directory is generated after the triples for all of its |
| 230 | subdirectories (directories are generated bottom up). |
| 231 | |
| 232 | When topdown is true, the caller can modify the dirnames list in-place |
| 233 | (e.g., via del or slice assignment), and walk will only recurse into the |
| 234 | subdirectories whose names remain in dirnames; this can be used to prune |
| 235 | the search, or to impose a specific order of visiting. Modifying |
| 236 | dirnames when topdown is false is ineffective, since the directories in |
| 237 | dirnames have already been generated by the time dirnames itself is |
| 238 | generated. |
| 239 | |
| 240 | By default errors from the os.listdir() call are ignored. If |
| 241 | optional arg 'onerror' is specified, it should be a function; it |
| 242 | will be called with one argument, an os.error instance. It can |
| 243 | report the error to continue with the walk, or raise the exception |
| 244 | to abort the walk. Note that the filename is available as the |
| 245 | filename attribute of the exception object. |
| 246 | |
| 247 | Caution: if you pass a relative pathname for top, don't change the |
| 248 | current working directory between resumptions of walk. walk never |
| 249 | changes the current directory, and assumes that the client doesn't |
| 250 | either. |
| 251 | |
| 252 | Example: |
| 253 | |
| 254 | from os.path import join, getsize |
| 255 | for root, dirs, files in walk('python/Lib/email'): |
| 256 | print root, "consumes", |
| 257 | print sum([getsize(join(root, name)) for name in files]), |
| 258 | print "bytes in", len(files), "non-directory files" |
| 259 | if 'CVS' in dirs: |
| 260 | dirs.remove('CVS') # don't visit CVS directories |
| 261 | """ |
| 262 | |
| 263 | from os.path import join, isdir, islink |
| 264 | |
| 265 | # We may not have read permission for top, in which case we can't |
| 266 | # get a list of the files the directory contains. os.path.walk |
| 267 | # always suppressed the exception then, rather than blow up for a |
| 268 | # minor reason when (say) a thousand readable directories are still |
| 269 | # left to visit. That logic is copied here. |
| 270 | try: |
| 271 | # Note that listdir and error are globals in this module due |
| 272 | # to earlier import-*. |
| 273 | names = listdir(top) |
| 274 | except error, err: |
| 275 | if onerror is not None: |
| 276 | onerror(err) |
| 277 | return |
| 278 | |
| 279 | dirs, nondirs = [], [] |
| 280 | for name in names: |
| 281 | if isdir(join(top, name)): |
| 282 | dirs.append(name) |
| 283 | else: |
| 284 | nondirs.append(name) |
| 285 | |
| 286 | if topdown: |
| 287 | yield top, dirs, nondirs |
| 288 | for name in dirs: |
| 289 | path = join(top, name) |
| 290 | if not islink(path): |
| 291 | for x in walk(path, topdown, onerror): |
| 292 | yield x |
| 293 | if not topdown: |
| 294 | yield top, dirs, nondirs |
| 295 | |
| 296 | __all__.append("walk") |
| 297 | |
| 298 | # Make sure os.environ exists, at least |
| 299 | try: |
| 300 | environ |
| 301 | except NameError: |
| 302 | environ = {} |
| 303 | |
| 304 | def execl(file, *args): |
| 305 | """execl(file, *args) |
| 306 | |
| 307 | Execute the executable file with argument list args, replacing the |
| 308 | current process. """ |
| 309 | execv(file, args) |
| 310 | |
| 311 | def execle(file, *args): |
| 312 | """execle(file, *args, env) |
| 313 | |
| 314 | Execute the executable file with argument list args and |
| 315 | environment env, replacing the current process. """ |
| 316 | env = args[-1] |
| 317 | execve(file, args[:-1], env) |
| 318 | |
| 319 | def execlp(file, *args): |
| 320 | """execlp(file, *args) |
| 321 | |
| 322 | Execute the executable file (which is searched for along $PATH) |
| 323 | with argument list args, replacing the current process. """ |
| 324 | execvp(file, args) |
| 325 | |
| 326 | def execlpe(file, *args): |
| 327 | """execlpe(file, *args, env) |
| 328 | |
| 329 | Execute the executable file (which is searched for along $PATH) |
| 330 | with argument list args and environment env, replacing the current |
| 331 | process. """ |
| 332 | env = args[-1] |
| 333 | execvpe(file, args[:-1], env) |
| 334 | |
| 335 | def execvp(file, args): |
| 336 | """execp(file, args) |
| 337 | |
| 338 | Execute the executable file (which is searched for along $PATH) |
| 339 | with argument list args, replacing the current process. |
| 340 | args may be a list or tuple of strings. """ |
| 341 | _execvpe(file, args) |
| 342 | |
| 343 | def execvpe(file, args, env): |
| 344 | """execvpe(file, args, env) |
| 345 | |
| 346 | Execute the executable file (which is searched for along $PATH) |
| 347 | with argument list args and environment env , replacing the |
| 348 | current process. |
| 349 | args may be a list or tuple of strings. """ |
| 350 | _execvpe(file, args, env) |
| 351 | |
| 352 | __all__.extend(["execl","execle","execlp","execlpe","execvp","execvpe"]) |
| 353 | |
| 354 | def _execvpe(file, args, env=None): |
| 355 | from errno import ENOENT, ENOTDIR |
| 356 | |
| 357 | if env is not None: |
| 358 | func = execve |
| 359 | argrest = (args, env) |
| 360 | else: |
| 361 | func = execv |
| 362 | argrest = (args,) |
| 363 | env = environ |
| 364 | |
| 365 | head, tail = path.split(file) |
| 366 | if head: |
| 367 | func(file, *argrest) |
| 368 | return |
| 369 | if 'PATH' in env: |
| 370 | envpath = env['PATH'] |
| 371 | else: |
| 372 | envpath = defpath |
| 373 | PATH = envpath.split(pathsep) |
| 374 | saved_exc = None |
| 375 | saved_tb = None |
| 376 | for dir in PATH: |
| 377 | fullname = path.join(dir, file) |
| 378 | try: |
| 379 | func(fullname, *argrest) |
| 380 | except error, e: |
| 381 | tb = sys.exc_info()[2] |
| 382 | if (e.errno != ENOENT and e.errno != ENOTDIR |
| 383 | and saved_exc is None): |
| 384 | saved_exc = e |
| 385 | saved_tb = tb |
| 386 | if saved_exc: |
| 387 | raise error, saved_exc, saved_tb |
| 388 | raise error, e, tb |
| 389 | |
| 390 | # Change environ to automatically call putenv() if it exists |
| 391 | try: |
| 392 | # This will fail if there's no putenv |
| 393 | putenv |
| 394 | except NameError: |
| 395 | pass |
| 396 | else: |
| 397 | import UserDict |
| 398 | |
| 399 | # Fake unsetenv() for Windows |
| 400 | # not sure about os2 here but |
| 401 | # I'm guessing they are the same. |
| 402 | |
| 403 | if name in ('os2', 'nt'): |
| 404 | def unsetenv(key): |
| 405 | putenv(key, "") |
| 406 | |
| 407 | if name == "riscos": |
| 408 | # On RISC OS, all env access goes through getenv and putenv |
| 409 | from riscosenviron import _Environ |
| 410 | elif name in ('os2', 'nt'): # Where Env Var Names Must Be UPPERCASE |
| 411 | # But we store them as upper case |
| 412 | class _Environ(UserDict.IterableUserDict): |
| 413 | def __init__(self, environ): |
| 414 | UserDict.UserDict.__init__(self) |
| 415 | data = self.data |
| 416 | for k, v in environ.items(): |
| 417 | data[k.upper()] = v |
| 418 | def __setitem__(self, key, item): |
| 419 | putenv(key, item) |
| 420 | self.data[key.upper()] = item |
| 421 | def __getitem__(self, key): |
| 422 | return self.data[key.upper()] |
| 423 | try: |
| 424 | unsetenv |
| 425 | except NameError: |
| 426 | def __delitem__(self, key): |
| 427 | del self.data[key.upper()] |
| 428 | else: |
| 429 | def __delitem__(self, key): |
| 430 | unsetenv(key) |
| 431 | del self.data[key.upper()] |
| 432 | def has_key(self, key): |
| 433 | return key.upper() in self.data |
| 434 | def __contains__(self, key): |
| 435 | return key.upper() in self.data |
| 436 | def get(self, key, failobj=None): |
| 437 | return self.data.get(key.upper(), failobj) |
| 438 | def update(self, dict=None, **kwargs): |
| 439 | if dict: |
| 440 | try: |
| 441 | keys = dict.keys() |
| 442 | except AttributeError: |
| 443 | # List of (key, value) |
| 444 | for k, v in dict: |
| 445 | self[k] = v |
| 446 | else: |
| 447 | # got keys |
| 448 | # cannot use items(), since mappings |
| 449 | # may not have them. |
| 450 | for k in keys: |
| 451 | self[k] = dict[k] |
| 452 | if kwargs: |
| 453 | self.update(kwargs) |
| 454 | def copy(self): |
| 455 | return dict(self) |
| 456 | |
| 457 | else: # Where Env Var Names Can Be Mixed Case |
| 458 | class _Environ(UserDict.IterableUserDict): |
| 459 | def __init__(self, environ): |
| 460 | UserDict.UserDict.__init__(self) |
| 461 | self.data = environ |
| 462 | def __setitem__(self, key, item): |
| 463 | putenv(key, item) |
| 464 | self.data[key] = item |
| 465 | def update(self, dict=None, **kwargs): |
| 466 | if dict: |
| 467 | try: |
| 468 | keys = dict.keys() |
| 469 | except AttributeError: |
| 470 | # List of (key, value) |
| 471 | for k, v in dict: |
| 472 | self[k] = v |
| 473 | else: |
| 474 | # got keys |
| 475 | # cannot use items(), since mappings |
| 476 | # may not have them. |
| 477 | for k in keys: |
| 478 | self[k] = dict[k] |
| 479 | if kwargs: |
| 480 | self.update(kwargs) |
| 481 | try: |
| 482 | unsetenv |
| 483 | except NameError: |
| 484 | pass |
| 485 | else: |
| 486 | def __delitem__(self, key): |
| 487 | unsetenv(key) |
| 488 | del self.data[key] |
| 489 | def copy(self): |
| 490 | return dict(self) |
| 491 | |
| 492 | |
| 493 | environ = _Environ(environ) |
| 494 | |
| 495 | def getenv(key, default=None): |
| 496 | """Get an environment variable, return None if it doesn't exist. |
| 497 | The optional second argument can specify an alternate default.""" |
| 498 | return environ.get(key, default) |
| 499 | __all__.append("getenv") |
| 500 | |
| 501 | def _exists(name): |
| 502 | try: |
| 503 | eval(name) |
| 504 | return True |
| 505 | except NameError: |
| 506 | return False |
| 507 | |
| 508 | # Supply spawn*() (probably only for Unix) |
| 509 | if _exists("fork") and not _exists("spawnv") and _exists("execv"): |
| 510 | |
| 511 | P_WAIT = 0 |
| 512 | P_NOWAIT = P_NOWAITO = 1 |
| 513 | |
| 514 | # XXX Should we support P_DETACH? I suppose it could fork()**2 |
| 515 | # and close the std I/O streams. Also, P_OVERLAY is the same |
| 516 | # as execv*()? |
| 517 | |
| 518 | def _spawnvef(mode, file, args, env, func): |
| 519 | # Internal helper; func is the exec*() function to use |
| 520 | pid = fork() |
| 521 | if not pid: |
| 522 | # Child |
| 523 | try: |
| 524 | if env is None: |
| 525 | func(file, args) |
| 526 | else: |
| 527 | func(file, args, env) |
| 528 | except: |
| 529 | _exit(127) |
| 530 | else: |
| 531 | # Parent |
| 532 | if mode == P_NOWAIT: |
| 533 | return pid # Caller is responsible for waiting! |
| 534 | while 1: |
| 535 | wpid, sts = waitpid(pid, 0) |
| 536 | if WIFSTOPPED(sts): |
| 537 | continue |
| 538 | elif WIFSIGNALED(sts): |
| 539 | return -WTERMSIG(sts) |
| 540 | elif WIFEXITED(sts): |
| 541 | return WEXITSTATUS(sts) |
| 542 | else: |
| 543 | raise error, "Not stopped, signaled or exited???" |
| 544 | |
| 545 | def spawnv(mode, file, args): |
| 546 | """spawnv(mode, file, args) -> integer |
| 547 | |
| 548 | Execute file with arguments from args in a subprocess. |
| 549 | If mode == P_NOWAIT return the pid of the process. |
| 550 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 551 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 552 | return _spawnvef(mode, file, args, None, execv) |
| 553 | |
| 554 | def spawnve(mode, file, args, env): |
| 555 | """spawnve(mode, file, args, env) -> integer |
| 556 | |
| 557 | Execute file with arguments from args in a subprocess with the |
| 558 | specified environment. |
| 559 | If mode == P_NOWAIT return the pid of the process. |
| 560 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 561 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 562 | return _spawnvef(mode, file, args, env, execve) |
| 563 | |
| 564 | # Note: spawnvp[e] is't currently supported on Windows |
| 565 | |
| 566 | def spawnvp(mode, file, args): |
| 567 | """spawnvp(mode, file, args) -> integer |
| 568 | |
| 569 | Execute file (which is looked for along $PATH) with arguments from |
| 570 | args in a subprocess. |
| 571 | If mode == P_NOWAIT return the pid of the process. |
| 572 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 573 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 574 | return _spawnvef(mode, file, args, None, execvp) |
| 575 | |
| 576 | def spawnvpe(mode, file, args, env): |
| 577 | """spawnvpe(mode, file, args, env) -> integer |
| 578 | |
| 579 | Execute file (which is looked for along $PATH) with arguments from |
| 580 | args in a subprocess with the supplied environment. |
| 581 | If mode == P_NOWAIT return the pid of the process. |
| 582 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 583 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 584 | return _spawnvef(mode, file, args, env, execvpe) |
| 585 | |
| 586 | if _exists("spawnv"): |
| 587 | # These aren't supplied by the basic Windows code |
| 588 | # but can be easily implemented in Python |
| 589 | |
| 590 | def spawnl(mode, file, *args): |
| 591 | """spawnl(mode, file, *args) -> integer |
| 592 | |
| 593 | Execute file with arguments from args in a subprocess. |
| 594 | If mode == P_NOWAIT return the pid of the process. |
| 595 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 596 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 597 | return spawnv(mode, file, args) |
| 598 | |
| 599 | def spawnle(mode, file, *args): |
| 600 | """spawnle(mode, file, *args, env) -> integer |
| 601 | |
| 602 | Execute file with arguments from args in a subprocess with the |
| 603 | supplied environment. |
| 604 | If mode == P_NOWAIT return the pid of the process. |
| 605 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 606 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 607 | env = args[-1] |
| 608 | return spawnve(mode, file, args[:-1], env) |
| 609 | |
| 610 | |
| 611 | __all__.extend(["spawnv", "spawnve", "spawnl", "spawnle",]) |
| 612 | |
| 613 | |
| 614 | if _exists("spawnvp"): |
| 615 | # At the moment, Windows doesn't implement spawnvp[e], |
| 616 | # so it won't have spawnlp[e] either. |
| 617 | def spawnlp(mode, file, *args): |
| 618 | """spawnlp(mode, file, *args) -> integer |
| 619 | |
| 620 | Execute file (which is looked for along $PATH) with arguments from |
| 621 | args in a subprocess with the supplied environment. |
| 622 | If mode == P_NOWAIT return the pid of the process. |
| 623 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 624 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 625 | return spawnvp(mode, file, args) |
| 626 | |
| 627 | def spawnlpe(mode, file, *args): |
| 628 | """spawnlpe(mode, file, *args, env) -> integer |
| 629 | |
| 630 | Execute file (which is looked for along $PATH) with arguments from |
| 631 | args in a subprocess with the supplied environment. |
| 632 | If mode == P_NOWAIT return the pid of the process. |
| 633 | If mode == P_WAIT return the process's exit code if it exits normally; |
| 634 | otherwise return -SIG, where SIG is the signal that killed it. """ |
| 635 | env = args[-1] |
| 636 | return spawnvpe(mode, file, args[:-1], env) |
| 637 | |
| 638 | |
| 639 | __all__.extend(["spawnvp", "spawnvpe", "spawnlp", "spawnlpe",]) |
| 640 | |
| 641 | |
| 642 | # Supply popen2 etc. (for Unix) |
| 643 | if _exists("fork"): |
| 644 | if not _exists("popen2"): |
| 645 | def popen2(cmd, mode="t", bufsize=-1): |
| 646 | """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' |
| 647 | may be a sequence, in which case arguments will be passed directly to |
| 648 | the program without shell intervention (as with os.spawnv()). If 'cmd' |
| 649 | is a string it will be passed to the shell (as with os.system()). If |
| 650 | 'bufsize' is specified, it sets the buffer size for the I/O pipes. The |
| 651 | file objects (child_stdin, child_stdout) are returned.""" |
| 652 | import popen2 |
| 653 | stdout, stdin = popen2.popen2(cmd, bufsize) |
| 654 | return stdin, stdout |
| 655 | __all__.append("popen2") |
| 656 | |
| 657 | if not _exists("popen3"): |
| 658 | def popen3(cmd, mode="t", bufsize=-1): |
| 659 | """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' |
| 660 | may be a sequence, in which case arguments will be passed directly to |
| 661 | the program without shell intervention (as with os.spawnv()). If 'cmd' |
| 662 | is a string it will be passed to the shell (as with os.system()). If |
| 663 | 'bufsize' is specified, it sets the buffer size for the I/O pipes. The |
| 664 | file objects (child_stdin, child_stdout, child_stderr) are returned.""" |
| 665 | import popen2 |
| 666 | stdout, stdin, stderr = popen2.popen3(cmd, bufsize) |
| 667 | return stdin, stdout, stderr |
| 668 | __all__.append("popen3") |
| 669 | |
| 670 | if not _exists("popen4"): |
| 671 | def popen4(cmd, mode="t", bufsize=-1): |
| 672 | """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' |
| 673 | may be a sequence, in which case arguments will be passed directly to |
| 674 | the program without shell intervention (as with os.spawnv()). If 'cmd' |
| 675 | is a string it will be passed to the shell (as with os.system()). If |
| 676 | 'bufsize' is specified, it sets the buffer size for the I/O pipes. The |
| 677 | file objects (child_stdin, child_stdout_stderr) are returned.""" |
| 678 | import popen2 |
| 679 | stdout, stdin = popen2.popen4(cmd, bufsize) |
| 680 | return stdin, stdout |
| 681 | __all__.append("popen4") |
| 682 | |
| 683 | import copy_reg as _copy_reg |
| 684 | |
| 685 | def _make_stat_result(tup, dict): |
| 686 | return stat_result(tup, dict) |
| 687 | |
| 688 | def _pickle_stat_result(sr): |
| 689 | (type, args) = sr.__reduce__() |
| 690 | return (_make_stat_result, args) |
| 691 | |
| 692 | try: |
| 693 | _copy_reg.pickle(stat_result, _pickle_stat_result, _make_stat_result) |
| 694 | except NameError: # stat_result may not exist |
| 695 | pass |
| 696 | |
| 697 | def _make_statvfs_result(tup, dict): |
| 698 | return statvfs_result(tup, dict) |
| 699 | |
| 700 | def _pickle_statvfs_result(sr): |
| 701 | (type, args) = sr.__reduce__() |
| 702 | return (_make_statvfs_result, args) |
| 703 | |
| 704 | try: |
| 705 | _copy_reg.pickle(statvfs_result, _pickle_statvfs_result, |
| 706 | _make_statvfs_result) |
| 707 | except NameError: # statvfs_result may not exist |
| 708 | pass |
| 709 | |
| 710 | if not _exists("urandom"): |
| 711 | def urandom(n): |
| 712 | """urandom(n) -> str |
| 713 | |
| 714 | Return a string of n random bytes suitable for cryptographic use. |
| 715 | |
| 716 | """ |
| 717 | try: |
| 718 | _urandomfd = open("/dev/urandom", O_RDONLY) |
| 719 | except: |
| 720 | raise NotImplementedError("/dev/urandom (or equivalent) not found") |
| 721 | bytes = "" |
| 722 | while len(bytes) < n: |
| 723 | bytes += read(_urandomfd, n - len(bytes)) |
| 724 | close(_urandomfd) |
| 725 | return bytes |