Example: Creating an ISO with UDF
This example will show how to create an ISO with the UDF bridge format. Here’s the complete code for the example:
try:
from cStringIO import StringIO as BytesIO
except ImportError:
from io import BytesIO
import pycdlib
iso = pycdlib.PyCdlib()
iso.new(udf='2.60')
foostr = b'foo\n'
iso.add_fp(BytesIO(foostr), len(foostr), '/FOO.;1', udf_path='/foo')
iso.add_directory('/DIR1', udf_path='/dir1')
iso.write('new.iso')
iso.close()
Let’s take a closer look at the code.
try:
from cStringIO import StringIO as BytesIO
except ImportError:
from io import BytesIO
import pycdlib
As in earlier examples, import the relevant libraries, including pycdlib itself.
iso = pycdlib.PyCdlib()
iso.new(udf='2.60')
Create a new PyCdlib object, and then create a new ISO with that object. In order to make it have UDF, we pass the argument udf='2.60' to the new method.
foostr = b'foo\n'
iso.add_fp(BytesIO(foostr), len(foostr), '/FOO.;1', udf_path='/foo')
As in earlier examples, create a new file on the ISO from a string. Because this is a UDF ISO, we have to provide the udf_path argument to add_fp as well. Like Joliet, UDF is a completely different context from the original ISO9660 structure, and so the argument to be passed here must be an absolute path, not a name. Because of this, the UDF file can be on a completely different part of the directory structure, or be omitted completely (in which case the file will only show up on the ISO9660 portion of the ISO).
iso.add_directory('/DIR1', udf_path='/dir1')
Create a new directory on the ISO. Again we must pass the udf_path argument to add_directory, for all of the same reasons and with the same restrictions as we saw above for add_fp.
iso.write('new.iso')
iso.close()
Write the new ISO out to a file, then close out the ISO.