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Full Discussion: BASH : Using declare in a loop
Top Forums Shell Programming and Scripting BASH : Using declare in a loop Post 302268043 by cfajohnson on Monday 15th of December 2008 12:22:35 AM
Old 12-15-2008
Quote:
Originally Posted by crs6785
I have a config file that needs to be formatted before it's sourced to a script. I've been formatting it with sed and dropping it in /tmp then sourcing it from there.

What is the format of the config file? Why do you have to change it?
Quote:
I'd like to just format the config file with sed then declare the variables without having to create a temporary file in /tmp. So I tried a loop like this ...

Code:
for line in $config_formatted; do
  var_name=$(echo "$line" | awk -F= '{print $1}')
  var_value=$(echo "$line" | awk -F= '{print $2}' | sed 's/\(^"\|"$\)//g')
  declare $var_name=$var_value
done


Why are you using declare? It's not necessary.
Quote:
This works fine except when $var_value contains a value that appends itself with another variable that should have been declared already. For example, when it formats my config file and runs through the loop I have it echo a few variables it declared at the end. I end up with ...

Code:
$ ./configRead

audit_host : http://server
non_ie_page : ${audit_host}/oa/admin_pc_add_2.php

As you can see from my original loop, I used sed to format $var_value to remove the quotations...which seems a little odd to have to do in the first place.

It is odd. Why do it?
Quote:
So perhaps I don't fully understand how declare is working?

What do you think it does?
Quote:
Is this simply a limitation that I cannot get around?

I don't know of any limitation to declare. It does what it is supposed to (but I've never had a reason to use it).
 

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LEARN ABOUT DEBIAN

printwait

MESSAGES(3)						  libbash messages Library Manual					       MESSAGES(3)

NAME

     messages -- libbash library that implements a set of functions to print standard status messages

SYNOPSIS

     printOK	 [indent]
     printFAIL	 [indent]
     printNA	 [indent]
     printATTN	 [indent]
     printWAIT	 [indent]

DESCRIPTION

   General
     messages is a collection of functions to print standard status messages - those [ OK ] and [FAIL] messages you see during Linux boot process.

     The function list:
	   printOK	    Prints a standard [ OK ] message (green)
	   printFAIL	    Prints a standard [FAIL] message (red)
	   printNA	    Prints a standard [ N/A] message (yellow)
	   printATTN	    Prints a standard [ATTN] message (yellow)
	   printWAIT	    Prints a standard [WAIT] message (yellow)

     Detailed interface description follows.

   indent
     Column to move to before printing.

     Default indent is calculated as TTY_WIDTH-10. If current tty width can not be determined (for example, in case of serial console), it
     defaults to 80, so default indent is 80-10=10

FUNCTIONS DESCRIPTIONS

   printOK [indent]
     Prints a standard [ OK ] message (green)

   printFAIL [indent]
     Prints a standard [FAIL] message (red)

   printNA [indent]
     Prints a standard [ N/A] message (yellow)

   printATTN [indent]
     Prints a standard [ATTN] message (yellow)

   printWAIT [indent]
     Prints a standard [WAIT] message (yellow)

EXAMPLES

     Run a program named MyProg, and report it's success or failure:

	      echo -n 'Running MyProg...'
	      printWAIT
	      if MyProg ; then
		      printOK
	      else
		      printFAIL
	      fi

AUTHORS

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

SEE ALSO

     ldbash(1), libbash(1)

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