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comp.lang.ruby

mysql.so: Permission denied (Ruby under Cygwin

Ronald Fischer

6/18/2007 12:16:00 PM

[this message is crossposted to the Cygwin- and RubyTalk mailing lists].

Running Ruby 1.8.6 under Cygwin, i.e.


$ /usr/bin/ruby --version
ruby 1.8.6 (2007-03-13 patchlevel 0) [i386-cygwin]

the statement

require 'mysql'

raises the following error message:

/usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so: Permission
denied - /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so
(LoadError)
from
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in `require'

The access rights to mysql.so are as follows:


-rw-r--r-- 1 rfischer mkgroup-l-d 81984 May 21 18:08
/usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so


Using the mysql module with Ruby on Windows outside Cygwin works well.
What could be the reason for this problem?

Ronald

--
Ronald Fischer <ronald.fischer@venyon.com>
Phone: +49-89-452133-162


1 Answer

Ronald Fischer

6/18/2007 1:15:00 PM

0

> > require 'mysql'
> >
> > raises the following error message:
> >
> >
> /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so:
> Permission
> > denied -
> /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so
> > (LoadError)
> > from
> >
> /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in `require'
> >
> > The access rights to mysql.so are as follows:
> >
> >
> > -rw-r--r-- 1 rfischer mkgroup-l-d 81984 May 21 18:08
> > /usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so
> >
> >
> > Using the mysql module with Ruby on Windows outside Cygwin
> works well.
> > What could be the reason for this problem?
>
> The first problem are the access rights. Shared libs must have the
> execute bits set. chmod +x mysql.so will help.

This helped a lot!

>
> The second problem is that this shared lib has been created for the
> native win32 version of ruby, not for the Cygwin version. It *might*
> work together, but it's neither guaranteed, nor supported.

... which might explain the new behaviour, that the programs starts to
run, but at the end gets a

~/thome/importer_tests $ onereq_oneappl.rb
/usr/lib/ruby/gems/1.8/gems/mysql-2.7.3-mswin32/ext/mysql.so: [BUG]
Segmentation fault
ruby 1.8.6 (2007-03-13) [i386-cygwin]

I see that I am here still on experimental ground. Maybe the idea of
using mysql from within
Cygwin-Ruby was really not so good in the first place....

Ronald
--
Ronald Fischer <ronald.fischer@venyon.com>
Phone: +49-89-452133-162