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Recent releases of Fedora and other GNU/Linux distributions include a Hardware Abstraction Layer (HAL) which is used to support device plug-and-play capabilities. In this post I will show you how your shell scripts can use HAL to retrieve device and system information. The term HAL is overloaded as it used to refer both to a specification [...] According to David Korn, a shell is primarily a string processing language. Pattern matching is an important compoment of any such language and indeed Korn Shell 93 (ksh93) has excellent support for extended patterns as well as regular expressions. Extended patterns can be thought of as class or type of extended regular expressions. Both [...] In previous posts, I discussed the SpiderMonkey command line shell js and how to add support to it to enable full access (read, write, create, copy, delete, etc.) to the local filesystem via the File object and the NSPR library. While rumaging around in the source code and documentation for js, I found that js [...] As you are probably aware JavaScript engines such as SpiderMonkey typically do not allow access to the local filesystem for reasons of security. To enable developers to test the scripts from a command line, js includes the load() function which enables you to load one or more JavaScript scripts into the SpiderMonkey engine. However this [...] One of the builtin commands that is missing in ksh93, in my humble opinion, is a builtin similar to stat(1) which would return information about a file. Here is my initial implementation of a stat builtin. The output is a compound variable whose subvariables contain the contents of the various fields of the stat(2) structure. [...] |
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