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Full Discussion: Substituting variables from external files
Top Forums Shell Programming and Scripting Substituting variables from external files Post 302220368 by oneillc9 on Thursday 31st of July 2008 01:09:48 PM
Old 07-31-2008
Substituting variables from external files
Hi All,

I have the following problem:

1. I have a file containing a line:
a,b,d,${d},e,f

2. From within a script I grep the file for '^a,' to get the line
3. I obtain the fourth field as follows:
Field4="$( print -r $fileEntry | cut -d, -f4 )"
4. The script exports variables at the beginning including ${d}

How do I get ${Field4} to contain the substituted variable ${d} instead of the literal '${d}'

I hope this is clear, I am happy to explain anything if I am talking jibberish.

Thanks in advance.

Chris
 

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LEARN ABOUT HPUX

makesh

MAKESH(1)						      General Commands Manual							 MAKESH(1)

NAME

       makeSH - a .SH script maker

SYNOPSIS

       makeSH files

DESCRIPTION

       MakeSH  examines  one or more scripts and produces a .SH file that, when run under sh, will produce the original script.  The .SH script so
       produced has two sections containing code destined for the output.  The first section has variable substitutions performed  on  it  (taking
       values  from  config.sh), while the second section does not.  MakeSH does not know which variables you want to have substituted, so it puts
       the whole script into the second section.  It's up to you to insert any variable substitutions in the first section for any values you want
       from config.sh.

       You  should  run  makeSH from within your top-level directory and use the relative path to the file as an argument, so that the "Extracting
       ..." line printed while running the produced .SH file later on will give that same path.

AUTHOR

       Larry Wall <lwall@netlabs.com>

SEE ALSO

       pat(1), metaconfig(1), makedist(1).

BUGS

       It could assume that variables from metaconfig's Glossary need to be initialized in the first section, but I'm too lazy to make it do that.

								       LOCAL								 MAKESH(1)
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