[Nagios-devel] Patch for portable CGI's

[Russell S. <ru...@qu...>]

  In the past I wrote about a way of making the CGI's truly portable 
(without needing to rerun ./configure or make).  The link to the old 
submission is:

http://sourceforge.net/mailarchive/forum.php?thread_id=915742&forum_id=1872

I finally created a patch file (a context diff for all the .c files in 
the cgi source directory - it is attached to this email).  This patch 
file was made fron Nagios 1.0b3, but I tested it and it fixes everything 
for b5 as well (it's a context diff, so it can see when lines have moved 
up or down without a problem).

This patch will make the CGI's look for the cgi.cfg file (and 
nagios.cmd) by calling a small function I added, instead of directly 
referencing a value in locations.h (where the hardcoded path is after 
you run ./configure).  The method will first look for the location of 
the cgi.cfg file in an Apache environment variable.  If there is no env 
variable set, it will then use the value in locations.h.

The one small thing I'm running into with this is that I get a bunch of 
warning messages when I run make all.  They are cast warnings relating 
to the changes I made, but the code does work fine.  If anyone who is a 
better coder wants to look into this and make the patch better, please 
feel free.

Now, to use the Apache environment variables, you need to edit your 
httpd.conf.  Here is a sample of an edited httpd.conf.

    # Nagios CGI-Bin Alias
    ScriptAlias /nagios/cgi-bin/ /usr/local/nagios/sbin/
    <Directory "/usr/local/nagios/sbin/">
        AllowOverride AuthConfig
        Options ExecCGI
        Order allow,deny
        Allow from all
        SetEnv NAGIOS_CGI_CONFIG /usr/local/nagios/etc/cgi.cfg
    </Directory>

This requires Apache 1.3.7 or higher.  But all you have to do is add the 
one extra line per Nagios CGI Alias definition in the httpd.conf.  This 
patch won't work for Netscape Webserver, but there's probably a similar 
way of getting an environment variable if someone wants to look into it.

I don't know if this can be a permanent solution for the Nagios CGI's 
that should be added to the code base, but it is working well for us. 
 If you have any questions/comments, please email me (and the list) 
back.  Thanks.

-Russell Scibetti


-- 
Russell Scibetti
Quadrix Solutions, Inc.
http://www.quadrix.com
(732) 235-2335, ext. 7038