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Full Discussion: bash hell , removing " and adding from a strings
Top Forums Shell Programming and Scripting bash hell , removing " and adding from a strings Post 302329565 by bwhitehd on Sunday 28th of June 2009 11:12:25 PM
Old 06-29-2009
I'm not sure that I understand correctly what you're asking, but I think you are assigning a value that start with $ to a variable and want that value output. You will need to escape the character as \$value.

Here is an example:
Code:
foo=a
bar=b
dog=c

orange=\$foo
chicken=\$bar
cat=\$dog

echo "--------------"
enable="$orange $chicken $cat"
echo $enable

echo "--------------"
deref="$orange $chicken $cat"
eval echo $deref

echo "--------------"
alist="foo bar dog"
for var in $alist
do
    eval echo \$$var
    eval echo \$var
done

echo "--------------"
blist="orange chicken cat"
for var in $blist
do
    eval echo \$$var
    eval echo \$var
done

One other thing I am showing here is how to dereference a variable reference with eval.

Code:
$ ./mytest.sh 
--------------
$foo $bar $dog
--------------
a b c
--------------
a
foo
b
bar
c
dog
--------------
$foo
orange
$bar
chicken
$dog
cat

I hope this gives you an idea to solve your question.

-B
 

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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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