Re: procfs in OpenBSD
o?= wrote: I failed googling about this topic. Any help please? :D :D :D :D procfs is the unix port of a /Plan9/ Design priciple: everything should be like a file. You can find A LOT of information here: http://plan9.bell-labs.com/plan9/ -- Mauro Rezzonico ma...@ch23.org, Como, Italia Maybe this world is another planet's hell - H.Huxley
Re: procfs in OpenBSD
hmm, on Tue, Sep 22, 2009 at 10:26:48PM -0400, Ted Unangst said that 2009/9/22 Sergio Andris Gsmez del Real sergio.g.delr...@gmail.com: maybe a little reference would be great, cause very little or non literature is found about OpenBSD implementation... (or maybe I'm struggling searching). I just wanna say I'm loving the system (and the phylosophy). The OpenBSD implementation of procfs was written/donated to BSD 15 years ago, back when it was still at Berkeley. In OpenBSD, it has barely changed since, and isn't really maintained or supported, so there's not much else to say about it. not to stir shit as Nic calls it, but openbsd was always swift to remove unused bit rotting stuff. what's the deal with procfs? if it's use is far from recommended, indeed rather forbidden, why is it left to rot? -f -- our world: a 8000 mile in diameter spherical pile of dirt.
Re: procfs in OpenBSD
if it's use is far from recommended, indeed rather forbidden, why is it left to rot? It is left there for historical reasons, because some old applications may use it. For new applications we do not use it, but prefer to use a properly designed sysctl or ioctl interface to retrieve information from the kernel.
Re: procfs in OpenBSD
On Fri, Sep 25, 2009 at 04:34:20PM +0200, frantisek holop wrote: to remove unused bit rotting stuff. what's the deal with procfs? if it's use is far from recommended, indeed rather forbidden, why is it left to rot? It's necessary for compat_linux. See the man page.
Re: procfs in OpenBSD
I wouldn't miss it... On Fri, Sep 25, 2009 at 08:49:15AM -0600, Bob Beck wrote: if it's use is far from recommended, indeed rather forbidden, why is it left to rot? It is left there for historical reasons, because some old applications may use it. For new applications we do not use it, but prefer to use a properly designed sysctl or ioctl interface to retrieve information from the kernel.
Re: procfs in OpenBSD
if it's use is far from recommended, indeed rather forbidden, why is it left to rot? It is left there for historical reasons, because some old applications may use it. For new applications we do not use it, but prefer to use a properly designed sysctl or ioctl interface to retrieve information from the kernel. The major reason for moving away from procfs is that there are numerous TOCTOU problems.
Re: procfs in OpenBSD
hmm, on Fri, Sep 25, 2009 at 03:01:18PM +, Matthew Szudzik said that On Fri, Sep 25, 2009 at 04:34:20PM +0200, frantisek holop wrote: to remove unused bit rotting stuff. what's the deal with procfs? if it's use is far from recommended, indeed rather forbidden, why is it left to rot? It's necessary for compat_linux. See the man page. certainly not all of it. i am using compat_linux without it. but yes, i can imagine it might be used there. -f -- down with TLAs! (three letter acronyms)
Re: procfs in OpenBSD
hmm, on Fri, Sep 25, 2009 at 02:44:07PM -0600, Theo de Raadt said that The major reason for moving away from procfs is that there are numerous TOCTOU problems. out of curiousity, in principle, what is the difference between accessing a through /procfs and the same value through sysctl, and/or kernel memory? isn't procfs just a window to peek at those values? also, don't the other systems care about these TOCTTOU problems? or they do it in a correct, secure way? -f -- reality is just another illusion.
Re: procfs in OpenBSD
hmm, on Fri, Sep 25, 2009 at 02:44:07PM -0600, Theo de Raadt said that The major reason for moving away from procfs is that there are numerous TOCTOU problems. out of curiousity, in principle, what is the difference between accessing a through /procfs and the same value through sysctl, and/or kernel memory? isn't procfs just a window to peek at those values? no. also, don't the other systems care about these TOCTTOU problems? or they do it in a correct, secure way? what happens if you read procfs files byte by byte, with sleeps between?
Re: procfs in OpenBSD
On Tue, Sep 22, 2009 at 10:26:48PM -0400, Ted Unangst wrote: 2009/9/22 Sergio Andris Gsmez del Real sergio.g.delr...@gmail.com: maybe a little reference would be great, cause very little or non literature is found about OpenBSD implementation... (or maybe I'm struggling searching). I just wanna say I'm loving the system (and the phylosophy). The OpenBSD implementation of procfs was written/donated to BSD 15 years ago, back when it was still at Berkeley. In OpenBSD, it has barely changed since, and isn't really maintained or supported, so there's not much else to say about it. In other words, don't start with procfs if you want to understand what OpenBSD does. if you can make it clearer what you want to study, people may be able to give more helpful advice than don't do this. Joachim
Re: procfs in OpenBSD
Hi. Sorry about the late response. I do know what problem am having and what exactly I want, sorry didn't post my original intention. I would like to know more about procfs implemention in OpenBSD, not just knowing how to mount it... That's what I refered to when I said didn't have success while googling (or something like that). I mounted procfs manually after started (and obviously processes already started). I'm a bit lost cause went to /proc and all processes where there, but files where empty. I'm pretty noob at hacking the kernel (really, all i've done is trying to figure out how can I make a switch to my 3G modem, not yet supported in the kernel (ZTE-626)). So, finally, I would just like to know how things really work, but not willing to just post here and wait for someone to explain me; maybe a little reference would be great, cause very little or non literature is found about OpenBSD implementation... (or maybe I'm struggling searching). I just wanna say I'm loving the system (and the phylosophy). Great, now we have another user doing stuff without understanding why. Even better, it's with procfs, which none of the developers want to touch. To the original poster: I suggest you figure out what problem you're trying to solve now, while you're thinking about it instead of later, when some problem with procfs kicks you in the teeth while you're under a deadline. Philip Guenther
Re: procfs in OpenBSD
Hi. Sorry about the late response. I do know what problem am having and what exactly I want, sorry didn't post my original intention. I would like to know more about procfs implemention in OpenBSD, not just knowing how to mount it... That's what I refered to when I said didn't have success while googling (or something like that). I mounted procfs manually after started (and obviously processes already started). I'm a bit lost cause went to /proc and all processes where there, but files where empty. I'm pretty noob at hacking the kernel (really, all i've done is trying to figure out how can I make a switch to my 3G modem, not yet supported in the kernel (ZTE-626)). So, finally, I would just like to know how things really work, but not willing to just post here and wait for someone to explain me; maybe a little reference would be great, cause very little or non literature is found about OpenBSD implementation... (or maybe I'm struggling searching). I just wanna say I'm loving the system (and the phylosophy).
Re: procfs in OpenBSD
2009/9/22 Sergio Andris Gsmez del Real sergio.g.delr...@gmail.com: maybe a little reference would be great, cause very little or non literature is found about OpenBSD implementation... (or maybe I'm struggling searching). I just wanna say I'm loving the system (and the phylosophy). The OpenBSD implementation of procfs was written/donated to BSD 15 years ago, back when it was still at Berkeley. In OpenBSD, it has barely changed since, and isn't really maintained or supported, so there's not much else to say about it.
Re: procfs in OpenBSD
On Sat, 19 Sep 2009, Sergio Andr?s G?mez del Real wrote: Hi. I failed googling about this topic. Any help please? :D :D :D :D This? # mount -t procfs /proc /proc Teers, -- Daniel Bolgheroni FEI - Faculdade de Engenharia Industrial http://www.dbolgheroni.eng.br/mykey ASCII ribbon campaign ( ) against HTML e-mail X / \
Re: procfs in OpenBSD
2009/9/20 Daniel Bolgheroni m...@dbolgheroni.eng.br: On Sat, 19 Sep 2009, Sergio Andr?s G?mez del Real wrote: I failed googling about this topic. Any help please? :D :D :D :D This? # mount -t procfs /proc /proc Great, now we have another user doing stuff without understanding why. Even better, it's with procfs, which none of the developers want to touch. To the original poster: I suggest you figure out what problem you're trying to solve now, while you're thinking about it instead of later, when some problem with procfs kicks you in the teeth while you're under a deadline. Philip Guenther
Re: procfs in OpenBSD
yeah what problem :D :D :D :D :D On Sat, Sep 19, 2009 at 6:54 PM, Marco Peereboom sl...@peereboom.us wrote: what problem are you trying to solve? On Sat, Sep 19, 2009 at 08:38:48PM -0500, Sergio Andr?s G?mez del Real wrote: Hi. I failed googling about this topic. Any help please? :D :D :D :D
Re: procfs in OpenBSD
U what? On Sun, Sep 20, 2009 at 12:08 AM, Paige Thompson erra...@devel.ws wrote: yeah what problem :D :D :D :D :D On Sat, Sep 19, 2009 at 6:54 PM, Marco Peereboom sl...@peereboom.us wrote: what problem are you trying to solve? On Sat, Sep 19, 2009 at 08:38:48PM -0500, Sergio Andr?s G?mez del Real wrote: Hi. I failed googling about this topic. Any help please? :D :D :D :D
Re: procfs in OpenBSD
Manual page description of mount_procfs(8) http://www.openbsd.org/cgi-bin/man.cgi?query=mount_procfssektion=8apropos=0 manpath=OpenBSD+Currentarch=i386 2009/9/19 Sergio Andris Gsmez del Real sergio.g.delr...@gmail.com: Hi. I failed googling about this topic. Any help please? :D :D :D :D
Re: procfs in OpenBSD
what problem are you trying to solve? On Sat, Sep 19, 2009 at 08:38:48PM -0500, Sergio Andr?s G?mez del Real wrote: Hi. I failed googling about this topic. Any help please? :D :D :D :D
procfs and OpenBSD 4.0
I've re-compiled the kernel with option procfs and I still get the error mount_procfs: /proc: Filesystem not supported by kernel when mounting. What else could I be missing ? Cheers, Linden.
