Re: [HACKERS] How to shoot yourself in the foot: kill -9 postmaster

[Alfred Perlstein]

> >Alfred Perlstein <[EMAIL PROTECTED]> writes:
> >>> Are there any portability problems with relying on shm_nattch to be
> >>> available?  If not, I like this a lot...
> >
> >> Well it's available on FreeBSD and Solaris, I'm sure Redhat has
> >> some deamon that resets the value to 0 periodically just for kicks
> >> so it might not be viable... :)
> >
> >I notice that our BeOS and QNX emulations of shmctl() don't support
> >IPC_STAT, but that could be dealt with, at least to the extent of
> >stubbing it out.

* Cyril VELTER <[EMAIL PROTECTED]> [010306 16:15] wrote:
> 
>    BeOS haven't this stat (I have a bunch of others but not this one).
> 
>    If I unsterstand correctly, you want to check if there is some backend 
> still attached to shared mem segment of a given key ? In this case, I have an 
> easy solution to fake the stat, because all segment have an encoded name 
> containing this key, so I can count them.

We need to be able to take a single shared memory segment and
determine if any other process is using it.

-- 
-Alfred Perlstein - [[EMAIL PROTECTED]|[EMAIL PROTECTED]]

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