[[!meta copyright="Copyright © 2008, 2009, 2011, 2012, 2018 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]]."]]"""]] [[!meta title="procfs"]] [[!template id=highlight text="""/!\ Obsolete /!\ --- This is no longer valid as a Google Summer of Code project. Madhusudan.C.S has implemented a new, fully functional [[procfs|madhusudancs]] as a [[GSoC 2008 project|2008]]. This was not the end of the story: [[jkoenig's `procfs`|hurd/translator/procfs]] is yet another re-written and improved version."""]] Although there is no standard (POSIX or other) for the layout of the `/proc` pseudo-filesystem, it turned out a very useful facility in GNU/Linux and other systems, and many tools concerned with process management use it. (`ps`, `top`, `htop`, `gtop`, `killall`, `pkill`, ...) Instead of porting all these tools to use [[hurd/libps]] (Hurd's official method for accessing process information), they could be made to run out of the box, by implementing a Linux-compatible `/proc` filesystem for the Hurd. The goal is to implement all `/proc` functionality needed for the various process management tools to work. (On Linux, the `/proc` filesystem is used also for debugging purposes; but this is highly system-specific anyways, so there is probably no point in trying to duplicate this functionality as well...) The [[existing_partially_working_procfs_implementation|hurd/translator/procfs]] can serve as a starting point, but needs to be largely rewritten. (It should use [[hurd/libnetfs]] rather than [[hurd/libtrivfs]]; the data format needs to change to be more Linux-compatible; and it needs adaptation to newer system interfaces.) This project requires learning [[hurd/translator]] programming, and understanding some of the internals of process management in the Hurd. It should not be too hard coding-wise; and the task is very nicely defined by the existing Linux `/proc` interface -- no design considerations necessary. **Note**: We already have several applications for this task. Possible mentors: Olaf Buddenhagen (antrik) Exercise: Add or fix one piece in the existing procfs translator.