Re: textvp_fullpath
On 14 August 2008 21:43:29 Roman Divacky wrote:
On Thu, Aug 14, 2008 at 09:20:12PM +0300, Uladzislau Rezki wrote:
Hello folks,
I'm using textvp_fullpath function to get full path from vnode up to
root dir. The problem is that, sometimes it works, sometimes no.
I know that textvp_fullpath goes through the cache of the vnode and
try to build full path.
Are there any other ways to get full path?
I haven't had any ideas yet, that is why I am asking you.
no... the vnode-full_path lookup is unreliable by definition
Yes , I've already got it.
in FreeBSD... what exactly are you trying to acomplish? I believe
there might be other way to do whatever you want to do..
Well, I will try to describe it in more detail what i want to do, see below:
The main task is, to pass information from the kernel space to user land
about modification of file system via character device.
For instance, we do something like that:
echo 123 /etc/passwd
we intercept the write system call and from this point we are within our own
call:
static int
our_own_write_syscall (struct proc *p, struct write_args *uap)
{
struct vnode *vn = NULL;
struct file *file;
int sys_error;
/* do system call */
sys_error = write(p, uap);
if (sys_error != 0)
goto leave_call;
/* get the file */
file = p-p_fd-fd_ofiles[uap-fd];
/* get the vnode */
vn = (struct vnode *) file-f_data;
...
}
We have to to do a few thinks:
1) do original write sys call;
2) get full path (/etc/passwd);
3) put all this information to user land through the character device.
I get stuck in point 2. I need to get full path, but how ...
Thanks in advance.
--
Uladzislau Rezki
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Re: tilt/horizontal scroll support
on 13/08/2008 19:29 Rui Paulo said the following: Well, perhaps the best way is to teach sysmouse about horizontal scrolling and then add a quirk WRT your mouse ? sysmouse(4) really needs to grow horizontal scrolling since nowadays every mouse has it. Rui, I agree, this would be a perfect solution. What scares me is backward compatibility. I think that I do not understand how to do it right. So that older userland software works with newer kernels and newer userland works with older kernels. As I understand there are interfaces of hardware mouse drivers, then there is moused, then there is sysmouse interface and then there are user applications like X server. Knowledge of horizontal scrolling needs to be added to all components in the chain and it is better be done in backward-compatible fashion. And I really do not know to do this properly. Would it be just adding some new bytes to the protocol or growing a new protocol (level) or something else... P.S. I replaced usb ml with arch@ in cc. -- Andriy Gapon ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
startup options
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I was wondering if it was possible, with a machine that has about 2 year old dual AMD64 processors and an up-to-date AMI BIOS, to get the machine to be able to start up from a power shutdown, after some sort of a network signal? If it might be possible, could you maybe put me onto the path of whatever info there might be on that subject? -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.9 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkil6/YACgkQz62J6PPcoOk0wQCfTxUcKLOdhsOUvpwVNYOw74Ly V04AoISC3BGQsnlJeCUsdSc/VxK+K0D6 =FsXX -END PGP SIGNATURE- ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: startup options
Chuck Robey wrote: I was wondering if it was possible, with a machine that has about 2 year old dual AMD64 processors and an up-to-date AMI BIOS, to get the machine to be able to start up from a power shutdown, after some sort of a network signal? If it might be possible, could you maybe put me onto the path of whatever info there might be on that subject? Wake on LAN is I believe a work in progress. http://wiki.freebsd.org/WakeOnLan its not an area I have much knowledge of though so other might be able to help more. Vince ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: startup options
On Fri, Aug 15, 2008 at 10:00:25PM +0100, Vincent Hoffman wrote: Chuck Robey wrote: I was wondering if it was possible, with a machine that has about 2 year old dual AMD64 processors and an up-to-date AMI BIOS, to get the machine to be able to start up from a power shutdown, after some sort of a network signal? If it might be possible, could you maybe put me onto the path of whatever info there might be on that subject? Wake on LAN is I believe a work in progress. http://wiki.freebsd.org/WakeOnLan its not an area I have much knowledge of though so other might be able to help more. That page pretty much summarises the state of affairs, yes. Basically, you need a VIA-based ethernet card card (vr driver) and -CURRENT, or a vr card with 7.0 and patches from here: http://www.stsp.name/wol/FreeBSD-8-CURRENT-wol-backported-to-7.0/ All of those. Except the patch for pxe.c, that's there by accident. If you don't have a vr card, you will likely need to do some hacking. Follow the links from the wiki page for more information. Stefan ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: startup options
Stefan Sperling wrote: On Fri, Aug 15, 2008 at 10:00:25PM +0100, Vincent Hoffman wrote: Chuck Robey wrote: I was wondering if it was possible, with a machine that has about 2 year old dual AMD64 processors and an up-to-date AMI BIOS, to get the machine to be able to start up from a power shutdown, after some sort of a network signal? If it might be possible, could you maybe put me onto the path of whatever info there might be on that subject? Wake on LAN is I believe a work in progress. http://wiki.freebsd.org/WakeOnLan its not an area I have much knowledge of though so other might be able to help more. That page pretty much summarises the state of affairs, yes. Basically, you need a VIA-based ethernet card card (vr driver) and -CURRENT, or a vr card with 7.0 and patches from here: http://www.stsp.name/wol/FreeBSD-8-CURRENT-wol-backported-to-7.0/ All of those. Except the patch for pxe.c, that's there by accident. If you don't have a vr card, you will likely need to do some hacking. Follow the links from the wiki page for more information. trouble% cd sys/dev/ trouble% grep -l IFCAP_WOL */*.c age/if_age.c jme/if_jme.c re/if_re.c stge/if_stge.c vr/if_vr.c So 5 drivers right now support WOL. Jack said em had support a while back but he seems to have not hooked it up. Sam ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: textvp_fullpath
On Fri, 15 Aug 2008, Uladzislau Rezki wrote: We have to to do a few thinks: 1) do original write sys call; 2) get full path (/etc/passwd); 3) put all this information to user land through the character device. I get stuck in point 2. I need to get full path, but how ... In FreeBSD 6.2 and higher, the kernel event auditing facility provides exactly this service already. Take a look at the auditpipe(4) facility for details of the run-time monitoring aspect of that. Robert N M Watson Computer Laboratory University of Cambridge ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
