Add fuse.py.
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# python-fuse-sample
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A sample FUSE filesystem in Python.
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This repo contains a very simple FUSE filesystem example in Python. It's the
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code from a post I wrote a while back:
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https://www.stavros.io/posts/python-fuse-filesystem/
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If you see anything needing improvement or have any feedback, please open an
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issue.
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134
fuse.py
Executable file
134
fuse.py
Executable file
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#!/usr/bin/env python
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from __future__ import with_statement
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import os
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import sys
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import errno
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from fuse import FUSE, FuseOSError, Operations
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class Passthrough(Operations):
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def __init__(self, root):
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self.root = root
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# Helpers
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# =======
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def _full_path(self, partial):
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if partial.startswith("/"):
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partial = partial[1:]
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path = os.path.join(self.root, partial)
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return path
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# Filesystem methods
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# ==================
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def access(self, path, mode):
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full_path = self._full_path(path)
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if not os.access(full_path, mode):
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raise FuseOSError(errno.EACCES)
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def chmod(self, path, mode):
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full_path = self._full_path(path)
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return os.chmod(full_path, mode)
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def chown(self, path, uid, gid):
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full_path = self._full_path(path)
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return os.chown(full_path, uid, gid)
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def getattr(self, path, fh=None):
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full_path = self._full_path(path)
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st = os.lstat(full_path)
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return dict((key, getattr(st, key)) for key in ('st_atime', 'st_ctime',
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'st_gid', 'st_mode', 'st_mtime', 'st_nlink', 'st_size', 'st_uid'))
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def readdir(self, path, fh):
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full_path = self._full_path(path)
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dirents = ['.', '..']
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if os.path.isdir(full_path):
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dirents.extend(os.listdir(full_path))
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for r in dirents:
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yield r
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def readlink(self, path):
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pathname = os.readlink(self._full_path(path))
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if pathname.startswith("/"):
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# Path name is absolute, sanitize it.
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return os.path.relpath(pathname, self.root)
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else:
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return pathname
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def mknod(self, path, mode, dev):
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return os.mknod(self._full_path(path), mode, dev)
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def rmdir(self, path):
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full_path = self._full_path(path)
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return os.rmdir(full_path)
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def mkdir(self, path, mode):
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return os.mkdir(self._full_path(path), mode)
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def statfs(self, path):
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full_path = self._full_path(path)
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stv = os.statvfs(full_path)
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return dict((key, getattr(stv, key)) for key in ('f_bavail', 'f_bfree',
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'f_blocks', 'f_bsize', 'f_favail', 'f_ffree', 'f_files', 'f_flag',
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'f_frsize', 'f_namemax'))
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def unlink(self, path):
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return os.unlink(self._full_path(path))
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def symlink(self, name, target):
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return os.symlink(name, self._full_path(target))
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def rename(self, old, new):
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return os.rename(self._full_path(old), self._full_path(new))
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def link(self, target, name):
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return os.link(self._full_path(target), self._full_path(name))
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def utimens(self, path, times=None):
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return os.utime(self._full_path(path), times)
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# File methods
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# ============
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def open(self, path, flags):
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full_path = self._full_path(path)
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return os.open(full_path, flags)
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def create(self, path, mode, fi=None):
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full_path = self._full_path(path)
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return os.open(full_path, os.O_WRONLY | os.O_CREAT, mode)
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def read(self, path, length, offset, fh):
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os.lseek(fh, offset, os.SEEK_SET)
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return os.read(fh, length)
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def write(self, path, buf, offset, fh):
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os.lseek(fh, offset, os.SEEK_SET)
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return os.write(fh, buf)
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def truncate(self, path, length, fh=None):
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full_path = self._full_path(path)
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with open(full_path, 'r+') as f:
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f.truncate(length)
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def flush(self, path, fh):
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return os.fsync(fh)
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def release(self, path, fh):
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return os.close(fh)
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def fsync(self, path, fdatasync, fh):
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return self.flush(path, fh)
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def main(mountpoint, root):
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FUSE(Passthrough(root), mountpoint, nothreads=True, foreground=True)
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if __name__ == '__main__':
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main(sys.argv[2], sys.argv[1])
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