f81a45e79a
This changes the data type for the buffer of the read and write syscalls from string to bytes. On Python 2, this has no effect. On Python 3, it is a breaking change, but fixes a serious usibility bug that limits file data to valid UTF-8 data. With these changes, files can contain arbitrary data.
91 lines
2.2 KiB
Python
91 lines
2.2 KiB
Python
#!/usr/bin/env python
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# Copyright (C) 2006 Andrew Straw <strawman@astraw.com>
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#
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# This program can be distributed under the terms of the GNU LGPL.
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# See the file COPYING.
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#
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import os, stat, errno
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# pull in some spaghetti to make this stuff work without fuse-py being installed
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try:
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import _find_fuse_parts
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except ImportError:
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pass
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import fuse
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from fuse import Fuse
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if not hasattr(fuse, '__version__'):
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raise RuntimeError("your fuse-py doesn't know of fuse.__version__, probably it's too old.")
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fuse.fuse_python_api = (0, 2)
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hello_path = '/hello'
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hello_str = b'Hello World!\n'
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class MyStat(fuse.Stat):
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def __init__(self):
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self.st_mode = 0
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self.st_ino = 0
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self.st_dev = 0
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self.st_nlink = 0
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self.st_uid = 0
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self.st_gid = 0
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self.st_size = 0
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self.st_atime = 0
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self.st_mtime = 0
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self.st_ctime = 0
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class HelloFS(Fuse):
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def getattr(self, path):
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st = MyStat()
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if path == '/':
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st.st_mode = stat.S_IFDIR | 0o755
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st.st_nlink = 2
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elif path == hello_path:
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st.st_mode = stat.S_IFREG | 0o444
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st.st_nlink = 1
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st.st_size = len(hello_str)
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else:
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return -errno.ENOENT
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return st
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def readdir(self, path, offset):
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for r in '.', '..', hello_path[1:]:
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yield fuse.Direntry(r)
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def open(self, path, flags):
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if path != hello_path:
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return -errno.ENOENT
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accmode = os.O_RDONLY | os.O_WRONLY | os.O_RDWR
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if (flags & accmode) != os.O_RDONLY:
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return -errno.EACCES
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def read(self, path, size, offset):
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if path != hello_path:
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return -errno.ENOENT
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slen = len(hello_str)
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if offset < slen:
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if offset + size > slen:
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size = slen - offset
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buf = hello_str[offset:offset+size]
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else:
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buf = b''
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return buf
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def main():
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usage="""
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Userspace hello example
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""" + Fuse.fusage
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server = HelloFS(version="%prog " + fuse.__version__,
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usage=usage,
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dash_s_do='setsingle')
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server.parse(errex=1)
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server.main()
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if __name__ == '__main__':
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main()
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