From: Coey Minear <cminear@...>
Date: 2006-07-21T04:50:28+09:00
Subject: Re: Trouble setting LD_LIBRARY_PATH for FastCGI script

Chris Gansen writes:
 > Hello -
 > 
 > I'm trying to exec a ruby script via FastCGI (on Apache 2.0), and cannot
 > properly set the env. variable LD_LIBRARY_PATH at run time.
 > 
 > I've tried adding:
 > 
 > SetEnv LD_LIBRARY_PATH /path/to/lib
 > 
 > in a .htaccess file, but to no avail. Perl, however, happily recognizes it.
 > Setting ENV['LD_LIBRARY_PATH'] does not take effect either.
 > 

I set this in Apache's httpd.conf file, in the <VirtualHost>
declaration.  You will also want to make sure you declare all the
libraries needed.  If you just declare "/path/to/lib", the libraries
wouldn't necessarily know where to find libraries in /usr/lib, for
example.  Here is the line I used (on my Solaris system): 
  SetEnv LD_LIBRARY_PATH /usr/lib:/usr/local/lib:/usr/openwin/lib:/usr/local/pgsql/lib

(Probably don't really need the /usr/openwin/lib, but...)
You would have to restart Apache, but I expect you would have to do
that anyways if one could set the same thing in the .htaccess.

 > In the error_log, I see:
 > 
 > [Thu Jul 20 11:32:33 2006] [warn] FastCGI: (dynamic) server
 > "/web/server_root/fcgi-bin/index.fcgi" restarted (pid 11242)
 > /path/to/ruby_bin/lib/ruby/site_ruby/1.8/i686-linux/fcgi.so: libfcgi.so.0:
 > cannot open shared object file: No such file or directory -
 > /path/to/ruby_bin/lib/ruby/site_ruby/1.8/i686-linux/fcgi.so (LoadError)
 >     from
 > /path/to/ruby_bin/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in
 > `require'
 >     from /path/to/index.fcgi:23
 > 
 > 
 > Strangely, when I execute the fcgi script from the command line, as:
 > 
 > $ LD_LIBRARY_PATH=/path/to/lib ./index/fcgi
 > 
 > I receive:
 > 
 > ./index.fcgi:25: undefined method `each_cgi' for FCGI:Class (NoMethodError)
 > 
 > Which is particularly vexing. This configuration works on another machine,
 > where the libraries are not in 'special' places.
 > 
 > Any advice on how to get Ruby to find the correct library?
 > 
 > -c-

Are you sure you've installed FastCGI on this system?  Based on what I
see in the log file: 
  1) The server cannot find libfcgi.so.0, which is installed with
FastCGI.  Make sure the file is present.
  2) You've probably installed ruby-fcgi since it knew about
FCGI:Class, but the fcgi.so file would require the libfcgi.so library.
Did you copy the ruby libraries over, but not the system libraries?

Coey


-- 
Coey Minear
Senior Test Engineer
(651) 628-2831
coey_minear@securecomputing.com

Secure Computing(R)
Securing Connections between People, Applications, and Networks(tm)
http://www.securecomputing.com
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