All of the checkpoints by moritz are strategically correct, but here are some tactical things to do to help debugging:

  • I assume that your webserver is properly configured (can you run other scripts?) and that your file/directory permissions are correct.
  • Compare your environments both in the shell (env|sort) and perl (print Dumper(\%ENV);) and compare the results from when you are logged in as yourself versus when the script is called by the webserver.
  • Make sure you can see the webserver access and error logs and know how to interpret messages there (or at least post them to perlmonks next time).
  • Your version of SVN is probably compiled against various shared libraries. These shared libraries may be installed in /usr/local/lib which is in your environmental variable LDPATH or LD_LIBRARY_PATH. However this env variable may be set to something different for the webserver process calling your perl script. I have frequently had problems like the one you are describing, and have discovered that the webserver error logs show that libraries like libapr, libapr_util, libiconv, libneon, etc could not be found when the webserver spawned process tried running SVN. SVN uses a lot of "non-core" (to the OS) libraries.

    In reply to Re: Why does the same perl routine behave differently under cgi? by fzellinger
    in thread Why does the same perl routine behave differently under cgi? by binurajkr

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