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From Andrew Clarke <acla...@civica.com.au>
Subject [users@httpd] DirectoryIndex /mybin/myindex.cgi
Date Thu, 08 Sep 2005 11:59:28 GMT

Hi Folks,

I'm going around in ever-tightening circles trying to get

    DirectoryIndex /mybin/myindex.cgi

directive to work against a directory within UserDir (ie ~user/public_html). 
The platform is SuSE 9.3 with the default installation of Apache 2.0.53. For 
the record, the config files are put into /etc/apache2, the ServerRoot 
is /srv/www, DocumentRoot is /srv/www/htdocs, and the ordinary CGI is 
in /srv/www/cgi-bin.

Ordinary CGI is working from cgi-bin, and also from within DocumentRoot after 
applying a few modest config settings. Details later.

To make the DirectoryIndex directive work, I first tried putting the script 
into /srv/www/cgi-bin, and after finally getting some clues about suEXEC and 
the requirement for scripts to be "under the docroot" I have tried shifting 
it to a /srv/www/htdocs/mybin directory. Permissions and owners of all 
directories are locked down to the necessary paranoia level described in the 
Apache manual page for suEXEC - because I started to see error messages 
implying suEXEC is involved.

Here are what I think is the significant configuration directives. Directives 
marked with ## are ones I've tried using or commenting out.

ServerRoot /etc/apache2	# to make config files relative
DocumentRoot "/srv/www/htdocs"
ScriptAlias /cgi-bin/ "/srv/www/cgi-bin/"
## ScriptAlias /cgi/ "/srv/www/htdocs/cgi/"
## AddHandler cgi-script .cgi

<Directory />
    Options None
    AllowOverride None
    Order deny,allow
    Deny from all
</Directory>

-- all other Directory below are Order allow,deny; Allow from all;

<Directory "/srv/www/htdocs">
    Options +Indexes +FollowSymLinks
</Directory>

<Directory "/srv/www/cgi-bin">
    Options +ExecCGI
</Directory>

<Directory "/srv/www/htdocs/cgi">
    Options +ExecCGI
</Directory>

<Directory /home/*/public_html>
    AllowOverride FileInfo AuthConfig Limit Indexes
    Options MultiViews Indexes SymLinksIfOwnerMatch Includes ExecCGI
    DirectoryIndex /cgi/myindex.cgi
    <Limit ...
    <LimitExcept ...
</Directory>

Currently the myindex.cgi script is a trivial piece of Perl:

    #!/usr/bin/perl
    use CGI qw(:standard);
    use CGI::Carp;
    print header, start_html('Test CGI Index'),
        "Test CGI index ", `pwd`, end_html();

When it was installed in /srv/www/cgi-bin, and invoked as 
http://myhost/cgi-bin/myindex.cgi then I get the expected output.

When it was installed in /srv/www/htdocs/cgi, and invoked as 
http://myhost/cgi/myindex.cgi then I get the expected output.

When I try to invoke the script via http://myhost/~username it fails.

error_log contains:

[Thu Sep 08 21:24:12 2005] [error] [client 127.0.0.1] Premature end of script 
headers: myindex.cgi

and suexec.log contains:

[2005-09-08 21:24:12]: uid: (400/username) gid: (100/100) cmd: myindex.cgi
[2005-09-08 21:24:12]: command not in docroot 
(/srv/www/htdocs/cgi/myindex.cgi)

and the browser shows: (slightly compressed)

Server error! The server encountered an internal error and was unable to 
complete your request.
Error message: Premature end of script headers: myindex.cgi
If you think this is a server error, please contact the webmaster.
Error 500


I must be missing some essential detail, but I cannot understand what. What 
does it take to make DirectoryIndex work with a CGI?

Thanks in advance,
Andrew Clarke

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