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comparison mercurial/win32.py @ 35512:5cc1becd0493

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win32: split a utility function to obtain the volume out of getfstype() This is only done on Windows because it's simple enough to call statfs() on Unix. The goal is to display this in `hg debugfs`.
author Matt Harbison <matt_harbison@yahoo.com>
date Fri, 29 Dec 2017 22:15:37 -0500
parents 2062f7c2ac83
children 94a127152e25
comparison
equal deleted inserted replaced
35511:d8f408d999f9 35512:5cc1becd0493
426 raise ctypes.WinError() # Note: WinError is a function 426 raise ctypes.WinError() # Note: WinError is a function
427 elif len == size: 427 elif len == size:
428 raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER) 428 raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER)
429 return buf.value 429 return buf.value
430 430
431 def getfstype(path): 431 def getvolumename(path):
432 """Get the filesystem type name from a directory or file (best-effort) 432 """Get the mount point of the filesystem from a directory or file
433 (best-effort)
433 434
434 Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc. 435 Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc.
435 """ 436 """
436 # realpath() calls GetFullPathName() 437 # realpath() calls GetFullPathName()
437 realpath = os.path.realpath(path) 438 realpath = os.path.realpath(path)
440 buf = ctypes.create_string_buffer(size) 441 buf = ctypes.create_string_buffer(size)
441 442
442 if not _kernel32.GetVolumePathNameA(realpath, ctypes.byref(buf), size): 443 if not _kernel32.GetVolumePathNameA(realpath, ctypes.byref(buf), size):
443 raise ctypes.WinError() # Note: WinError is a function 444 raise ctypes.WinError() # Note: WinError is a function
444 445
445 t = _kernel32.GetDriveTypeA(buf.value) 446 return buf.value
447
448 def getfstype(path):
449 """Get the filesystem type name from a directory or file (best-effort)
450
451 Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc.
452 """
453 volume = getvolumename(path)
454
455 t = _kernel32.GetDriveTypeA(volume)
446 456
447 if t == _DRIVE_REMOTE: 457 if t == _DRIVE_REMOTE:
448 return 'cifs' 458 return 'cifs'
449 elif t not in (_DRIVE_REMOVABLE, _DRIVE_FIXED, _DRIVE_CDROM, 459 elif t not in (_DRIVE_REMOVABLE, _DRIVE_FIXED, _DRIVE_CDROM,
450 _DRIVE_RAMDISK): 460 _DRIVE_RAMDISK):
451 return None 461 return None
452 462
453 size = 256 463 size = 256
454 name = ctypes.create_string_buffer(size) 464 name = ctypes.create_string_buffer(size)
455 465
456 if not _kernel32.GetVolumeInformationA(buf.value, None, 0, None, None, None, 466 if not _kernel32.GetVolumeInformationA(volume, None, 0, None, None, None,
457 ctypes.byref(name), size): 467 ctypes.byref(name), size):
458 raise ctypes.WinError() # Note: WinError is a function 468 raise ctypes.WinError() # Note: WinError is a function
459 469
460 return name.value 470 return name.value
461 471