def open(self, img_file, read_only=False, options=None, fobj=None):
"""open an existing image file"""
# file base check
if fobj is None:
# make sure image file exists
if not os.path.exists(img_file):
raise IOError("image file not found")
# is readable?
if not os.access(img_file, os.R_OK):
raise IOError("can't read from image file")
# is writeable? -> no: enforce read_only
if not os.access(img_file, os.W_OK):
read_only = True
# check size
st = os.stat(img_file)
mode = st.st_mode
if stat.S_ISBLK(mode) or stat.S_ISCHR(mode):
size = BlkDevTools.getblkdevsize(img_file)
else:
size = os.path.getsize(img_file)
if size == 0:
raise IOError("image file is empty")
# fobj
else:
fobj.seek(0, 2)
size = fobj.tell()
fobj.seek(0, 0)
# detect type
t = self.detect_type(img_file, fobj, options)
if t == None:
raise IOError("can't detect type of image file")
# create blkdev
if t == self.TYPE_ADF:
blkdev = ADFBlockDevice(img_file, read_only, fobj=fobj)
blkdev.open()
elif t == self.TYPE_HDF:
# detect geometry
geo = DiskGeometry()
if not geo.detect(size, options):
raise IOError("can't detect geometry of HDF image file")
blkdev = HDFBlockDevice(img_file, read_only, fobj=fobj)
blkdev.open(geo)
else:
rawdev = RawBlockDevice(img_file, read_only, fobj=fobj)
rawdev.open()
# create rdisk instance
rdisk = RDisk(rawdev)
if not rdisk.open():
raise IOError("can't open rdisk of image file")
# determine partition
p = "0"
if options != None and options.has_key('part'):
p = str(options['part'])
part = rdisk.find_partition_by_string(p)
if part == None:
raise IOError("can't find partition in image file")
blkdev = part.create_blkdev(True) # auto_close rdisk
blkdev.open()
return blkdev
def open(self, img_file, read_only=False, options=None, fobj=None):
"""open an existing image file"""
# file base check
if fobj is None:
# make sure image file exists
if not os.path.exists(img_file):
raise IOError("image file not found")
# is readable?
if not os.access(img_file, os.R_OK):
raise IOError("can't read from image file")
# is writeable? -> no: enforce read_only
if not os.access(img_file, os.W_OK):
read_only = True
# check size
st = os.stat(img_file)
mode = st.st_mode
if stat.S_ISBLK(mode) or stat.S_ISCHR(mode):
size = BlkDevTools.getblkdevsize(img_file)
else:
size = os.path.getsize(img_file)
if size == 0:
raise IOError("image file is empty")
# fobj
else:
fobj.seek(0,2)
size = fobj.tell()
fobj.seek(0,0)
# detect type
t = self.detect_type(img_file, fobj, options)
if t == None:
raise IOError("can't detect type of image file")
# create blkdev
if t == self.TYPE_ADF:
blkdev = ADFBlockDevice(img_file, read_only, fobj=fobj)
blkdev.open()
elif t == self.TYPE_HDF:
# detect geometry
geo = DiskGeometry()
if not geo.detect(size, options):
raise IOError("can't detect geometry of HDF image file")
blkdev = HDFBlockDevice(img_file, read_only, fobj=fobj)
blkdev.open(geo)
else:
rawdev = RawBlockDevice(img_file, read_only, fobj=fobj)
rawdev.open()
# create rdisk instance
rdisk = RDisk(rawdev)
if not rdisk.open():
raise IOError("can't open rdisk of image file")
# determine partition
p = "0"
if options != None and options.has_key('part'):
p = str(options['part'])
part = rdisk.find_partition_by_string(p)
if part == None:
raise IOError("can't find partition in image file")
blkdev = part.create_blkdev(True) # auto_close rdisk
blkdev.open()
return blkdev
def create(self, img_file, force=True, options=None, fobj=None):
if fobj is None:
# make sure we are allowed to overwrite existing file
if os.path.exists(img_file):
if not force:
raise IOError("can't overwrite existing image file")
# not writeable?
if not os.access(img_file, os.W_OK):
raise IOError("can't write image file")
# detect type
t = self.detect_type(img_file, fobj, options)
if t == None:
raise IOError("can't detect type of image file")
if t == self.TYPE_RDISK:
raise IOError("can't create rdisk. use rdbtool first")
# create blkdev
if t == self.TYPE_ADF:
blkdev = ADFBlockDevice(img_file, fobj=fobj)
blkdev.create()
else:
# determine geometry from size or chs
geo = DiskGeometry()
if not geo.setup(options):
raise IOError("can't determine geometry of HDF image file")
blkdev = HDFBlockDevice(img_file, fobj=fobj)
blkdev.create(geo)
return blkdev
def create(self, img_file, force=True, options=None):
# make sure we are allowed to overwrite existing file
if os.path.exists(img_file):
if not force:
raise IOError("can't overwrite existing image file")
# not writeable?
if not os.access(img_file, os.W_OK):
raise IOError("can't write image file")
# detect type
t = self.detect_type(img_file, options)
if t == None:
raise IOError("can't detect type of image file")
if t == self.TYPE_RDISK:
raise IOError("can't create rdisk. use rdbtool first")
# create blkdev
if t == self.TYPE_ADF:
blkdev = ADFBlockDevice(img_file)
blkdev.create()
else:
# determine geometry from size or chs
geo = DiskGeometry()
if not geo.setup(options):
raise IOError("can't determine geometry of HDF image file")
blkdev = HDFBlockDevice(img_file)
blkdev.create(geo)
return blkdev
