Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH] sysctl: Allow /proc/sys without sys_sysctl | Date | Wed, 12 Jul 2006 15:32:05 +0200 |
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On Wednesday 12 July 2006 05:13, Eric W. Biederman wrote: > Andi Kleen <ak@suse.de> writes: > > ebiederm@xmission.com (Eric W. Biederman) writes: > >> Since sys_sysctl is deprecated start allow it to be compiled out. > >> This should catch any remaining user space code that cares, > > > > I tried this long ago, but found that glibc uses sysctl in each > > program to get the kernel version. It probably handles ENOSYS, > > but there might be slowdowns or subtle problems from it not knowing > > the kernel version. > > > > So I think it's ok to remove the big sysctl, but at a very minimal > > replacement that just handles (CTL_KERN, KERN_VERSION) is needed. > > If glibc is looking at kernel.osrelease it might make sense. > If glibc is looking at kernel.version which is just the build number > and date I can't imagine a correct usage.
It's KERN_VERSION
From my /bin/ls:
_sysctl({{CTL_KERN, KERN_VERSION}, 2, 0xbfc8e1e0, 30, (nil), 0}) = 0
> If this usage is still common in glibc we can decide what to do > when the warnings pop up.
printk for everything would annoy basically everybody. Not a good idea.
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