sysctl hacks

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Aug 21 13:29:44 PDT 2004


In message <20040821200205.GE26612 at elvis.mu.org>, Alfred Perlstein writes:
>I'm doing some work that requires that I have a sysctl structure
>be passed around, but inside that structure are several pointers I
>may need to dereference.
>
>Basically:
>
>struct mysysctldata {
>   .... (data here)
>   void *moredata;
>   size_t morelen;
>};
>
>What is the proper way of sysctl'ing IN the data from moredata?
>
>I need to make a copy of the sysctl req, but... I'm not sure what
>to initialize the 'lock' member to.

Just use the SYSCTL_IN() and ..._OUT() functions.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


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