a sysctl for process binary osreldate

Robert N. M. Watson rwatson at FreeBSD.org
Sat Mar 17 20:51:29 UTC 2012

On 17 Mar 2012, at 19:30, Mikolaj Golub wrote:

> Currently we can check and change binary osreldate of another process via
> procfs(5).
> Kostik suggested to add a new sysctl for the same purpose and also extend
> procstat to show osrel.
> Here are patches I am going to commit if there are no objections or
> suggestions.
> http://people.freebsd.org/~trociny/kern_proc_osrel.1.patch
> http://people.freebsd.org/~trociny/procstat.osrel.1.patch
> I set the same permissions as for procfs(5) osrel -- so only user can read it,
> but may be this is too restrictive and p_cansee on read would be ok?
> I added osrel output to procstat -b option:
> kopusha:~% procstat -b 2975
>  PID COMM                OSREL PATH
> 2975 emacs             1000001 /usr/local/bin/emacs-23.3
> Would this be ok or someone see a better way?

Support for writing the field seems to violate the synchronisation protocol defined for p_osrel in proc.h. In the new world order, is this simply a documentation bug, or is it also a software bug?


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