def df(self):
"""Get disk usage statistics
@rtype: list
@return: list with two elements: (available bytes, total bytes)
"""
avail = c_ulonglong(0)
total = c_ulonglong(0)
task = _PyCephLibTask(self.libceph.ceph_df,
(byref(avail), byref(total)))
task.execute()
return (avail.value, total.value)
def unlink(self, filename):
"""Unlink a file
@type filename: string
@param filename: name of the file to unlink
@rtype: int
@return: 0 on success
"""
task = _PyCephLibTask(self.libceph.ceph_unlink, (filename,))
task.execute()
return task.return_value
def close(self, file_handle):
"""Close a file
@type file_handle: int
@param file_handle: file handle of the file to close
@rtype: int
@return: always == 0
"""
task = _PyCephLibTask(self.libceph.ceph_close, (file_handle,))
task.execute()
return task.return_value
def fsync(self, file_handle, sync_data_only):
"""Sync a file to disk
@type file_handle: int
@param file_handle: file handle of the file to sync
@type sync_data_only: boolean
@param sync_data_only: whether or not to also sync metadata
@rtype: int
@return: always == 0
"""
self.libceph.ceph_fsync.argtypes = [c_int, c_bool]
task = _PyCephLibTask(self.libceph.ceph_fsync,
(file_handle, sync_data_only))
task.execute()
return task.return_value
def open(self, filename, flags, mode):
"""Open a file
@type filename: string
@param filename: name of the file to open
@type flags: int
@param flags: see os open() flag constants
@type mode: int
@param mode: see stat module
@rtype: int
@return: if >= 0: a file handle representing the opened file
elif < 0: error code representing a failure
"""
self.libceph.ceph_open.restype = c_int
task = _PyCephLibTask(self.libceph.ceph_open, (filename, flags, mode))
task.execute()
return task.return_value
def write(self, file_handle, string_buffer, offset):
"""Write a string to a file
@type file_handle: int
@param file_handle: file handle of the file to write to
@type string_buffer: string
@param string_buffer: the string to write
@type offset: long
@param offset: offset in the file to start writing at
@rtype: int
@return: if >= 0: number of bytes written
elif < 0: error code representing a failure
"""
self.libceph.ceph_write.argtypes = [c_int, c_char_p, c_long, c_long]
task = _PyCephLibTask(self.libceph.ceph_write)
buf = create_string_buffer(string_buffer)
task.args = (file_handle,\
buf,\
c_long(sizeof(buf)),\
c_long(offset))
task.execute()
return task.return_value
