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Full Discussion: Combining multiple variables into new variable
Top Forums Shell Programming and Scripting Combining multiple variables into new variable Post 302524880 by dring on Wednesday 25th of May 2011 01:56:45 AM
Old 05-25-2011
Hey guys,

Thanks again for your help above, much appreciated.
I'm now trying to use the eval statement as advised above before attempting an array.

Can anyone tell me what i'm doing wrong? I sort of understand the method behind the eval command but haven't been able to use it successfully with the below script...
It should be self explanatory what im trying to acheive, any help would be appreciated. Thanks!
Code:
#!/bin/bash

a=/archive
n=1
home=/home/gohara/test

dir_1=/sd1
dir_2=/sd2
dir_3=/sd3

filemask_1=TAV*.???
filemask_2=TAV*.???
filemask_3=TAV*.???

fileage_1=30
fileage_2=30
fileage_3=30

deleteage_1=365
deleteage_2=365
deleteage_3=365


while [ $n -le 3 ]

do

#eval echo '$'dir_$n

eval find $home$dir_$n/$filemask_$n -type f -mtime +$fileage_$n -exec ls {} $home$dir_$n$a \;

n=`expr $n + 1`

done
echo "Script Complete"

Last edited by Franklin52; 05-25-2011 at 07:00 AM.. Reason: Code tags
 

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LEARN ABOUT X11R4

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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