This is very neat!
I've also applied the bugfixes from Kent, and released 0.5.1 on
rubyforge. 0.5.1 lets Kent's drb filesystem be used.
http://rubyforge.org/projects/fusefs/
Thanks, Kent!
- Greg
Kent Sibilev wrote:
> Sorry for replying to my previous email. With this patch applied, here
> is the simple implementation (less than 100 lines of code) of Ruby
> remote filesystem using DRb.
>
> server.rb:
> #!/usr/bin/env ruby
>
> require 'drb'
>
> class RemoteDirectory
> def initialize(dir)
> @dir = dir
> @files = {}
> end
>
> def contents(path)
> Dir[File.join(@dir, path,'*')].map{|fn| File.basename fn}
> end
>
> %w|file? directory? executable? size delete|.each do |name|
> define_method(name) do |path|
> File.send name, File.join(@dir, path)
> end
> end
>
> %w|mkdir rmdir|.each do |name|
> define_method(name) do |path|
> Dir.send name, File.join(@dir, path)
> end
> end
>
> %w|can_write? can_delete? can_mkdir? can_rmdir?|.each do |name|
> define_method(name) do |path|
> true
> end
> end
>
> def raw_open(path, mode)
> return true if @files.has_key? path
> @files[path] = File.open(File.join(@dir, path), mode)
> return true
> rescue
> puts $!
> false
> end
>
> def raw_read(path, off, size)
> file = @files[path]
> return unless file
> file.seek(off, File::SEEK_SET)
> file.read(size)
> rescue
> puts $!
> nil
> end
>
> def raw_write(path, off, sz, buf)
> file = @files[path]
> return unless file
> file.seek(off, File::SEEK_SET)
> file.write(buf[0, sz])
> rescue
> puts $!
> end
>
> def raw_close(path)
> file = @files[path]
> return unless file
> file.close
> @files.delete path
> rescue
> puts $!
> end
> end
>
> if $0 == __FILE__
> dir = RemoteDirectory.new ARGV.shift || '.'
> uri = ARGV.shift || 'druby://0.0.0.0:7777'
> DRb.start_service uri, dir
> puts DRb.uri
> DRb.thread.join
> end
>
> rubyfs.rb:
> #!/usr/bin/env ruby
>
> require 'drb'
> require 'fusefs'
>
> unless (1..2).include? ARGV.size
> puts "Usage: #$0 <directory> <uri>"
> exit(1)
> end
>
> dir = ARGV.shift
> uri = ARGV.shift || 'druby://0.0.0.0:7777'
>
> DRb.start_service(nil, nil)
> root = DRbObject.new_with_uri(uri)
>
> FuseFS.set_root(root)
> FuseFS.mount_under(dir)
> FuseFS.run
>
> Now I don't have to use samba in order to access files on my Windows
> workstation! :)
>
> Cool.
> Kent.
>
> On Sun, 2005-10-30 at 05:18 +0900, Kent Sibilev wrote:
>
>> Thank you.
>> I've been playing with new raw API and I've found it somewhat broken.
>> Please consider this diff:
>>
>> RCS file: /var/cvs/fusefs/fusefs/ext/fusefs_lib.c,v
>> retrieving revision 1.9
>> diff -u -r1.9 fusefs_lib.c
>> --- fusefs_lib.c 15 Oct 2005 21:48:03 -0000 1.9
>> +++ fusefs_lib.c 29 Oct 2005 20:07:03 -0000
>> @@ -637,7 +637,7 @@
>>
>> newfile->next = opened_head;
>> opened_head = newfile;
>> - return 1;
>> + return 0;
>> }
>> debug(" no.\n");
>>
>> @@ -845,7 +845,7 @@
>> /* raw read */
>> debug(" yes.\n");
>> rf_call(path,id_raw_close,Qnil);
>> - return 0;
>> + goto out;
>> }
>> debug(" no.\n");
>>
>> @@ -867,6 +867,8 @@
>> }
>> }
>>
>> +out:
>> +
>> /* Free the file contents. */
>> if (!is_editor) {
>> if (prev == NULL) {
>> @@ -1246,7 +1248,13 @@
>> VALUE args = rb_ary_new();
>> rb_ary_push(args,INT2NUM(offset));
>> rb_ary_push(args,INT2NUM(size));
>> - rf_call(path,id_raw_read,args);
>> + VALUE ret = rf_call(path,id_raw_read,args);
>> + if(ret == Qnil)
>> + return 0;
>> + StringValue(ret);
>> + if(RSTRING(ret)->len < size)
>> + size = RSTRING(ret)->len;
>> + memcpy(buf, RSTRING(ret)->ptr, size);
>> return size;
>> }
>>
>> Cheers,
>> Kent.
>>
>> On Sat, 2005-10-29 at 16:52 +0900, Greg Millam wrote:
>>
>>> Lo, another travesty was visited upon the ruby-talk community ...
and this one was named ... FuseFS 0.5!
>>>
>>> --------------
>>>
>>> FuseFS is a ruby module that lets you define Filesystems in ruby,
so you can navigate a database. Browse virtual filesystems with ls and
cd! Or even, with _why_the_lucky_stiff's railsfs.rb (included in FuseFS
0.5!) view your Ruby On Rails data on your filesystem! Do you want to
know more?
>>>
>>>
http://redhanded.hobix.com/inspect/railsfsAfterACoupleMinutesOfToolin... >>>
>>> Aside from the awesome railsfs.rb and the FUSE-2.4 change, what
else is included?
>>>
>>> Well, remember how you couldn't get some apps to recognize a file
as being anything other than empty? Well now you can correct that
assumption!
>>>
>>> fuseroot#size will be called on files, so when xmms tries to load
your ruby-offered mp3, it'll be able to!
>>>
>>> And a treat for those working with big (and I mean BIG) files that
they don't want all loaded into ram:
>>>
>>> "raw_open" and associated methods will allow fuseroot to receive
the actual, individual read and write requests for each file, so that
you can return portions of a file at a time!
>>>
>>>
http://rubyforge.org/projects/fusefs/ >>>
>>> Happy coding!
>>>
>>> - Greg
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