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Full Discussion: [Beginner's questions] Filename Validation & Parsing
Top Forums Shell Programming and Scripting [Beginner's questions] Filename Validation & Parsing Post 302725409 by levaldez on Friday 2nd of November 2012 07:19:31 AM
Old 11-02-2012
Hammer & Screwdriver [Beginner's questions] Filename Validation & Parsing
Hi !!

I'm rather new both to the UNIX and scripting worlds, and I'm learning the ropes of scripting. Having said this, please excuse me if you notice certain basic errors.

I'm working on a script that implements .jar and .war files for a WAS environment and I need to perform certain validations, before copying and moving files around within different working environments.

Our .jar filename structure follows:

<whatever application name>_YYYYMMMDD_HHmm_nnnn.jar

Example:

myapp_20121031_1021_1234.jar
otherappname_20120928_0943_3212.jar

I receive the .jar filename as a parameter and I need to extract the first portion of the filename into a variable. I'm not sure how to do this. Either use the 'cut' command or 'awk'.

Basically, whenever I get the filename parameter, I must discard the final 23 bytes and keep the rest.

For example, for the first sample filename, I need to extract 'myapp' into a variable. For the second example, I need to extract the portion 'otherappname'.

I'd really appreciate your help

Thanks in advance !!

Enrique Valdez

PS: This a AIX 5.3 machine and Korn Shell.
 

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LEARN ABOUT DEBIAN

jh_generateorbitdir

JH_GENERATEORBITDIR(1)						    Javahelper						    JH_GENERATEORBITDIR(1)

NAME

       jh_generateorbitdir - Creates and populates an orbit dir used by pde-build for third-party jar files.

SYNOPSIS

       jh_generateorbitdir [debhelperoptions] [--orbit-dir=dir] [orbit-dep[...]]

DESCRIPTION

       jh_generateorbitdir is a javahelper program that handles creation of an orbit dependency dir. This directory has to be populated with non-
       eclipse jar files. However, eclipse refers to these jars by their "symbolic name". jh_generateorbitdir can extract this name from the jar's
       manifest (provided it has the OSGi metadata) and create a symlink to it.

       jh_generateorbitdir will replace regular files with symlinks if they are present in the orbit dir and clash with the name of one of the
       orbit jars. If an orbit jar name clashes with a symlink in the orbit dir, then jh_generateorbitdir will assume that the given jar has
       already been symlinked correctly. In this case the jar file is still recorded in the cache (see below).

       jh_generateorbitdir will also check the default installation for jar files on Debian systems (at the time of writing /usr/share/java), if
       it cannot find the jar in the current dir.

       Jar files replaced by jh_generateorbitdir will be recorded so that jh_installeclipse can replace with symlinks them post install.

FILES

       debian/eclipse.orbitdeps
	   List of orbit dependencies - one per line. This can be used as an alternative to passing it per command line.

OPTIONS

       --orbit-dir=dir
	   Specifies the directory from where the orbit-dir is or should be created. Defauls to "debian/.eclipse_build/orbitdeps".

EXAMPLE

	 jh_generateorbitdir --orbit-dir orbit asm3 oro

       Will generate a folder called orbit with two symlinks based on asm3 and oro's symbolic name.

SEE ALSO

       debhelper(7)

       This program is a part of javahelper and uses debhelper as backend. There are also tutorials in /usr/share/doc/javahelper.

AUTHOR

       Niels Thykier <niels@thykier.net>

COPYRIGHT AND LICENSE

       Copyright 2010 by Niels Thykier

       This tool is free software; you may redistribute it and/or modify it under the terms of GNU GPL 2.

0.43								    2011-04-29						    JH_GENERATEORBITDIR(1)
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