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Re^2: perl lost its modules!

by dave_the_m (Monsignor)
on Apr 02, 2014 at 00:09 UTC ( #1080659=note: print w/replies, xml ) Need Help??

in reply to Re: perl lost its modules!
in thread perl lost its modules!

This is a long shot, but is it possible that one of the earlier dirs in @INC has permissions that prevent perl from looking in it and is causing perl to terminate the search early?
Actually that is almost certainly the issue. The OP has /root first in the path which normally isn't accessible, and perl 5.18.0 onwards stops and errs on failure:
$ perl5180 -I/root -Mstrict -e 1 Can't locate Permission denied. BEGIN failed--compilation aborted. $


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Re^3: perl lost its modules!
by seandarcy (Initiate) on Apr 02, 2014 at 01:10 UTC

    OK, you're my new favorite solution. How do I change the INC path? Or do I create the /root/perl5 folders, and chmod 755?

      How do I change the INC path? Or do I create the /root/perl5 folders, and chmod 755
      You mention earlier that "The Fedora installation does set PERL5LIB to /root/perl5", to which I would reply, no it doesn't, not by default. what I suspect you are doing is being logged in as root, and in root's /root/.bashrc or similar, it sets PERL5LIB to $HOME/perl5. Then you are doing su user rather than su - user, and so inheriting root's environment. Note that /root is the root user's home directory; a non-root user should *not* be accessing anything under /root.

      So in summary, your PERL5LIB environment variable shouldn't be set; find out how its being set, and stop it.


        Absolutely right. You are the winner. This is a remote server I'm using for video encoding. For various odd reasons it's necessary to ssh in as root, and then su. If I su - user all works.

        We've done this for years. It was only with the upgrade to Fedora 20 (and perl-5.16 -> perl-5.18) did we have the problem.

        Thanks for all the help. I'd never have figured this out on my own.

      How was Perl installed? Was it an RPM or build-from-scratch? It seems strange that an RPM would put anything under /root in @INC. Changing dir perms is usually a Bad Idea (tm) so I would consider completely uninstalling Perl and starting over if possible.

      It helps to remember that the primary goal is to drain the swamp even when you are hip-deep in alligators.


      echo $PERL5LIB

      That's a shell, not a perl, command.

      Someone possibly set this previously somewhere such as /etc/profile. If that is the problem, until you can figure where it is set — grep -R PERL5LIB /etc will help with that — just

      export PERL5LIB=

      I.e., nothing after the equals sign. You could also add that to ~/.bashrc.

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