creating a temporary file in python with FUSE

Question

I am trying to write a program using python-fuse, but I can't get file writing down. my file_class looks like this

class FuseFile(object):
def __init__(self, path, flags, *mode):
    debug(path)
    #debug(mode);
    self.file = tempfile.TemporaryFile(*mode);
    self.fd = self.file.fileno()
    self.path = path
def write(self, buf, offset):
    head, tail = os.path.split(self.path)
    self.file.seek(offset);
    self.file.write(buf);
    return len(buf)

def read(self, length, offset):
    file = apiCall("readfile",{"file":self.path}).read();
    slen = len(file)
    if length < slen:
        if offset + size > slen:
            size = slen - offset
        buf = file[offset:offset+size]
    else:
        buf = ''
    return file # I don't know if this buff stuff is necesarry...
def ftruncate(self, len):
    self.file.truncate(len);
def release(self, flags):
    self.file.close()
def flush(self):
    self._fflush()
def fsync(self, isfsyncfile):
    self._fflush()
    if isfsyncfile and hasattr(os, 'fdatasync'):
        os.fdatasync(self.fd)
    else:
        os.fsync(self.fd)
def _fflush(self):
    if 'w' in self.file.mode or 'a' in self.file.mode:
        self.file.flush()

but when I try and edit the file in a editor like VIM I get this:

"mnt/stuff.txt" E514: write error (file system full?)
WARNING: Original file may be lost or damaged
don't quit the editor until the file is successfully written!

[EDIT] I found the problem, I didn't have a open method, but even so, I eventually took out the file_class to implement the methods in the main FUSE class, because that seems to work better

Indivisible

Glad you found the problem. Feel free to write an answer to your own question, and tick it off (so this question won't look unanswered). I think you have to wait 24 hours before you can answer your own question, so you should be able to come back and do this in about 5 hours. – Bemire

Answer 1

I eventually found out that the probelm was that I hadn't created a open(), or create() method in my file class, but eventually I settled with implementing all the methods in the main FUSE class because the file_class didn't seem to be working for me

Indivisible