This patch implements <exec> tag support for
freemarker. It has only been tested on linux. <exex
"command"> will fork a process, and inline anything
that process sends to stdout in the template. we've
used this to integrate htdig support into a site
entirely built with freemarker and java servlets, since
our navigation framework resides entirely in freemarker
templates, and we didn't want to duplicate that work in
the htdig results page script.
BE CAREFUL! this tag, depending on use, may allow you
to set something up so that users of your web
application could run arbitrary code on your server.
This can only happen if you allow unchecked GET/POST
submissions to be used as the command string in the
unpack the tarball in your freemarker153 directory. It
contains three files: EXEC_INSTALL.txt, exec.patch, and
rebuild your freemarker.jar.