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The Scheme Shell

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 PostPosted: Mon Dec 11, 2006 11:36 pm   
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Location: Des Moines, Iowa
Shell scripting languages provide systems administrators with powerful tools to automate mundane tasks, saving hours of work. Most of these languages, however, do not provide a well-designed object system, nor are they optimized for recursion and abstraction. Scheme, a dialect of LISP, incorporates all the features of a good programming language as listed above. Because Scheme cannot interact with UNIX primitives alone, there is a Scheme software package called scsh (the scheme shell). Scsh provides a set of macros for the Scheme programming language, adding the ability to call on all standard UNIX system calls and even adds regular expressions.

In this article, I will briefly introduce and describe the important features of the Scheme language and present some of my own scripts written in scsh, which exhibit many of the listed features. This article presumes that you know how to program using Scheme. If you are new to Scheme, read the Notes section at the end of this article, which provides numerous learning resources.

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