[R] meta-question about R

Jim Lemon jim at bitwrit.com.au
Thu Apr 24 13:42:12 CEST 2014

On 04/24/2014 08:52 PM, mark wrote:
> On 04/23/14 23:22, William Dunlap wrote:
>> Aren't those files support for named semaphores (made with sem_open())?
>> Packages like BH and RSQLite contain calls to sem_open. Is your
>> long-running
>> R process using such a package?
>> I don't think you would want to delete those files, but perhaps you
>> can look into
>> whatever R package creates them and see if you can modify the code to
>> give
>> them better names and then add those names to rkhunter's whitelist.
> You don't seem to understand what I'm asking. I have zero intention of
> deleting those files. I'm sure that my user's long-running job is
> creating them. What I'm asking is if ANYONE HERE knows if there is some
> configuration file, or command inside R, that would tell R, whatever
> package it's using (I assume that all packages inherit from the
> top-level process), when it creates files in /dev/shm, to name them
> something that I can use with wildcards in rkhunter's configuration file
> so that rkhunter ignores them.
> mark

Hi mark,
You are correct, I didn't understand what you were asking. Doing a bit 
of searching, the sem_open function's first argument is the name of the 
file that is to be created. It doesn't sound like you are specifying 
these filenames, so it is probably a matter of finding the function that 
calls sem_open or sem_init. I would approach this by grepping the source 
code of the functions that you are calling, but as I have no idea what 
these functions are (or how many levels of function calling goes on 
before one of these two functions is called), I can't provide a 
straightforward answer. If you do find the offending function, you can 
just edit the source code to include your "R_temp" prefix, save the 
edited function, and "source" it to replace the function that is not 
providing the prefixes.


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