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diff --git a/user/flaviocruz.mdwn b/user/flaviocruz.mdwn new file mode 100644 index 00000000..c4d3db69 --- /dev/null +++ b/user/flaviocruz.mdwn @@ -0,0 +1,124 @@ +[[!meta copyright="Copyright © 2008 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled +[[GNU Free Documentation License|/fdl]]."]]"""]] + +Name: Flávio Cruz + +Email: flaviocruz at gmail dot com + +Some [Hurd stuff](http://opensvn.csie.org/leic/hurd/) + +And code: [cl-hurd](http://git.savannah.gnu.org/cgit/hurd/incubator.git/log/?h=clisp) + +## Summer session + +Creating an extensible translator library in lisp using the mig generated stubs. + +### What's done + +- 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: +<pre> + (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) +</pre> +- 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: + - hurd-common + - mach + - hurd + - hurd-translator + - tree-translator +- 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 + + +### Project dependencies + +- CLISP +- [CFFI](http://common-lisp.net/project/cffi/) (apt-get installable) +- [Flexi streams](http://www.weitz.de/flexi-streams/) (apt-get installable) +- [Trivial garbage](http://www.cliki.net/trivial-garbage) (not in debian repositories) +- [cl-zip](http://common-lisp.net/project/zip/) (only needed for the zip translator) +- [cl-irc](http://common-lisp.net/project/cl-irc/) (for the irc translator) + + +## To do + +### Documentation +- Manually Bootstrapping a Translator + +### Translation +- Translate the Hurd website to Portuguese? + +## Completed tasks + +### Patches +- http://alioth.debian.org/tracker/index.php?group_id=30628&atid=410472 + - 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._GCC_4.1.patch.patch) + - http://opensvn.csie.org/leic/hurd/patches/glibc-init-first.patch +- Patch to remove some GNUMach IPC warnings and minor cleanup: + - http://opensvn.csie.org/leic/hurd/patches/gnumach-ipc-warnings.patch +- Website patches that correct some encountered typos: + - http://opensvn.csie.org/leic/hurd/patches/hurd-talk-typo.patch + +### Documentation read + +- 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 + +### Before selection + +- Uptime program in C and Lisp using CFFI. +- Hello translator. + +## Misc + +### Lisp implementations that run on Hurd + +- Clisp +- ECL +- ? |