On Sep 1, 2012, at 19:30 , Dennis Fisher wrote:
> Colleagues,
>
> I recently upgraded my OS to Mountain Lion. Previously, when ran R from a
> terminal and I issued the command:
> PSOUTPUT <- system("ps", intern=TRUE)
> the output returned without a problem.
>
> Since upgrading to Mountain Lion (R 2.15.1), the same command returns the
> message:
> dyld: DYLD_ environment variables being ignored because main executable
> (/bin/ps) is setuid or setgid
> Issuing the "ps" command directly from the terminal or from Rgui does not
> create the same behavior.
>
> I tracked the problem down to the following. Running R in a terminal:
> > grep("DYLD", system("set", intern=T), value=T)
> [1]
> "DYLD_LIBRARY_PATH=/Library/Frameworks/R.framework/Resources/lib/x86_64"
> Executing the same command from Rgui:
> > grep("DYLD", system("set", intern=T), value=T)
> character(0)
> And, in a terminal:
> set | grep DYLD
> returns nothing.
>
> It appears that R64, but not Rgui, sets DYLD_LIBRARY_PATH. Can anyone offer
> an explanation? I discovered that:
> Sys.unsetenv("DYLD_LIBRARY_PATH")
> prevents the problem. Do I incur any hidden risks by executing that command?
>
Well, something could be using the path.... If it's not there in R.app, I have
a hunch that nothing actually _is_ using it, but you need a better expert than
me to be sure (Simon?).
Anyways, a bit of Googling indicates that this has been an annoyance for others
as well (e.g., affecting sudo for MySQL users), and that it is fixed in the
10.8.1 upgrade of Mountain Lion, so perhaps just wait it out?
(I sincerely hope that only the warning is new and that setuid programs always
have ignored the dynamic library path. Otherwise it would be a security hole
the size of a truck...)
-pd
> Dennis
>
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone: 1-866-PLessThan (1-866-753-7784)
> Fax: 1-866-PLessThan (1-866-753-7784)
> www.PLessThan.com
>
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--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: [email protected] Priv: [email protected]
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