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See Also: Information on the CGIs
If you're doing custom installs of Nagios for clients, you may want to have a custom header and/or footer displayed in the output of the CGIs. This is particularly useful for displaying support contact information, etc. to the end user.
If the custom header and footer files are executable, then the files are executed and their output returned to the user, so they should output valid HTML. Using this you can run your own custom designed CGI to insert data into the nagios display. This has been used to insert graphs from rrdtool using ddraw and command menus into the nagios display pane. The execuable customer header and footer files are run with the same CGI environment as the main nagios CGI, so your files can parse the query information, authenticated user information, etc. to produce appropriate output.
How Does It Work?
You can include custom headers and footers in the output of the CGIs by dropping some appropriately named HTML files in the ssi/ subdirectory of the Nagios HTML directory (i.e. /usr/local/nagios/share/ssi).
Custom headers are included immediately after the <BODY>> tag in the CGI output, while custom footers are included immediately before the closing </BODY> tag.
There are two types of customer headers and footers:
You are not required to use any custom headers or footers. You can use only a global header if you wish. You can use only CGI-specific headers and a global footer if you wish. Whatever you want. Really.