newLISP is everything that old-school LISP languages are, with a lot of modern features. First off, it's a scripting language that's extremely fast. It has networking ability that's powerful enough to write TCP or UDP client or server applications. Then, to top that off, it has a command called net-eval which makes newLISP stand out from the crowd by giving it the unique ability to easily distribute tasks to other nodes over a network connection.
Binaries (under 200 kilobytes) are available for Windows, BSD, Linux, Mac OS X, Solaris and a host of other platforms. It is released under the GPL. Performance is also second to none. newLISP has been topping the charts on script interpreter benchmarks in several categories thanks to it's small size (under 200 kilobytes) and efficient C code. It outruns php, perl, and even ruby.
newLISP also has some other tricks up its sleeve that make it an excellent system administration scripting language. It has decent filesystem support, so it can see if files or directories exist, determine if a file's permissions are acceptable for reading or writing, and it has very powerful text processing ability using PCRE (perl compatible regular expressions). Finally, it's also worth mentioning that newLISP can easily import whole functions from dynamic libraries such as libmysqlclient (instant MySQL access from within newLISP!), tcl/tk (for creating graphical applications in newLISP) and zlib (for compression and decompression) just to name a few. This makes newLISP one of the most robust and flexible languages around. As you can tell, newLISP is a formidable choice for hackers, geeks, network admins or security professionals wishing to create scripted programs to do network operations or distributed computing with minimal effort
I am lucky to have been able to work directly with Lutz, the founder and creator of newLISP. I got a few direct lessons from him, and from there, started tinkering with it on my own. With that, the first thing I did was create a makeshift port scanner. I learn easiest by example, so here is what I came up with.
Click to see port.lsp
The first part simply assigns the command line arguments into a list called params, then makes sure that 4 parameters were given (program name, host, begin port and ending port). If not, it displays a usage tip before exiting. The second part assigns elements of the list to appropriate variables, then uses a for loop to iterate through the ports, displaying open port numbers that are open. Note that on machines with packet filters that "drop" packets, this port scan will take a very long time. nmap is a much more robust port scanner, however this little script demonstrates the power of newLISP's network commands. We'll run this as a test just for fun:
Now, let's look into distributed computing, shall we? The core command behind newLISP's distributed computing power -- called "net-eval" -- operates on a list of lists (similar to a 3 dimensional array). The inner-most list is a list of host, port, and a string representing the command(s) you wish to run on the remote node. The outer-most list can contain as many host-port-command lists as your heart desires, allowing you to run many distributed processes at once, and get the results back all at the same time. Then, outside those lists is a timeout in milliseconds. If a result isn't returned in the timeout period, the operation returns "nil" (that is, false). To clarify, net-eval syntax is as follows:
The online documentation for newLISP is very extensive, and features a few rather advanced demonstration scripts, including a working web server written entirely in newLISP. While learning a new programming language is never easy, newLISP is more than mature enough in both implementation and documentation to make it a pretty easy language to add to your list.
NewLISP Website, full of demonstration newLISP programs, documentation, binaries for many platforms, and newLISP source code:
(newLISPer) is a journal, or blog, written by a guy who was just learning newLISP. It's turned into a bunch of newLISP tutorials with some philosophy tossed in as well:
Norman's code snippets is a website full of newLISP programs and snippets for Linux (not tested on other platforms). There is a lot of really interesting applications and widgets available to download: