Name: Flávio Cruz
Email: flaviocruz at gmail dot com
Some Hurd stuff
And code: cl-hurd
Creating an extensible translator library in lisp using the mig generated stubs.
- The library for writing translators is mostly written.
- This library is intended to implement virtual filesystems. Examples are: translators were data is located in a local file (like zipfs, tarfs, rarfs, ...), single file translators (that do content filtering, output of a command, etc), network based filesystems (ftpfs, httpfs, ...), proxy filesystems (like hostmux, usermux, etc..)
- It's possible to specialize the basic translator library and implement new translator classes. This is done using CLOS.
- There is a tree-translator class that makes the managing of a node tree very easy, doing all the work for us, through a simple directory API and implementing the directory callbacks for us.
- There is a simple example (something like zipfs) translator that can expose the directories and file contents of a ZIP file.
- More translator examples include:
- /dev/null translator.
- /dev/zero translator.
- translator that creates a symlink node.
- tmpfs like translator.
- a translator that does proxying between clients and the underlying translator returning all data in upper-case.
- a translator that watches for changes in a file describing the file system structure.
- an IRC translator.
- a categorizer translator: creates a virtual directory containing files listed in a file, each file is categorized with a script. For example, a script can output the music author (in an mp3 file) and then all files will be categorized by author.
- Translator options (manipulated through fsysopts) have a simple and easy to use API.
- All the Mach port manipulation API is available.
- It's possible to send and receive messages. Simple example:
(let* ((spec-mixed (make-message-spec :fields '(:string :integer :char :string :integer :real))) (msg-mixed (make-message :spec spec-mixed)) (port (port-allocate :right-receive))) (send-message msg-mixed :remote port :data (list "abc" 42 #\b "cba" 314 3.14)) (receive-message msg-mixed :source port) ; This returns T on success. (get-message msg-mixed))) ; Returns '("abc" 42 #\b "cba" 314 3.14)
- New message types (like :string, :integer) can be implemented, providing a powerful extension mechanism.
- Creation of symlinks and symlink path resolution.
- Creation of character/block devices, fifos and sockets.
- Patch that opens stdin + stdout to /dev/null.
- Project has been separated into 5 ASDF installable systems:
- Test cases are now written.
What needs to be done
- Fix fsys-getroot (block happens in trivfs based translators, when they do RPC's to me when I call fsys_getroot to them) and fetch-root (for passive translators).
- Make the library multithreaded (blocked by the pthread conversion project and the unavailable thread support in CLISP)
- Use the socket stubs?
- More documentation
- CFFI (apt-get installable)
- Flexi streams (apt-get installable)
- Trivial garbage (not in debian repositories)
- cl-zip (only needed for the zip translator)
- cl-irc (for the irc translator)
- Manually Bootstrapping a Translator
- Translate the Hurd website to Portuguese?
- libsvg patch accepted.
- Adapted glibc patch (http://www.schwinge.homeip.net/~thomas/tmp/glibc-patches/0009-2007-07-22-version-of-init-first.c_vs.GCC4.1.patch.patch)
- Patch to remove some GNUMach IPC warnings and minor cleanup:
- Website patches that correct some encountered typos:
- GNU/Hurd User's Guide, an introduction to the important concepts and software of the GNU system, written for new users, AKA "GNUbies."
- Towards a New Strategy of OS Design, an architectural overview by Thomas Bushnell, BSG.
- The Hurd, a presentation by Marcus Brinkmann.
- The Hurd Hacking Guide.
- The GNU Mach Reference Manual
- The GNU Hurd Reference Manual
- The Unofficial GNU Mach IPC beginner's guide
- Mach IPC without MIG
- CFFI User's Manual
- Uptime program in C and Lisp using CFFI.
- Hello translator.
Lisp implementations that run on Hurd