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Full Discussion: How to evaluate a variable name on LHS of expression?
Top Forums Shell Programming and Scripting How to evaluate a variable name on LHS of expression? Post 302886778 by DJR on Monday 3rd of February 2014 02:41:50 PM
Old 02-03-2014
How to evaluate a variable name on LHS of expression?
I am trying to write a simple function to select values from a database and assign them to variables. It can have any number of arguments sent into it, and I want to assign the value retrieved to a different variable name for each argument sent in. So my code looks something like this:

Code:
function getParms {
for parm
do 
   `$parm`=`db2 +w -x "SELECT PARM_VALUE_TXT FROM ${FRMWRK_DB_SCHEMA}.JOB_PARM WHERE PARM_NM='$parm' WITH UR"`
done 
getParms parm1 parm2 parm3

I know the db2 statement works correctly. If I just run it once and hardocde the lefthand side with a variable name and then echo it out, it is selecting the proper value from the DB and assiging it correctly. But I can't get it to assign it to the parm name I send in. Essentially I need that $parm evaluated first to the parameter name and then used as the LHS of the expression. I have tried every quoting method I know of but can't get it to work. (this is Korn shell)

Thanks.
 

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xmtransfersetparameters

XmTransferSetParameters(library call)									     XmTransferSetParameters(library call)

NAME

       XmTransferSetParameters -- A toolkit function that establishes parameters to be passed by the next call to XmTransferValue

SYNOPSIS

       #include <Xm/Transfer.h>

       void XmTransferSetParameters(
       XtPointer transfer_id,
       XtPointer parm,
       int parm_fmt,
       unsigned long parm_length,
       Atom parm_type);

DESCRIPTION

       XmTransferSetParameters establishes a parameter definition.  Your application calls XmTransferSetParameters just before calling XmTransfer-
       Value, and only if XmTransferValue needs to transfer a value containing a parameter.

       transfer_id
		 Specifies a unique indentifier for the data transfer operation.  The value must be the same as the value of the transfer_id  mem-
		 ber of the XmDestinationCallbackStruct passed to the XmNdestinationCallback procedure.

       parm	 Specifies  parameters	to  be passed to the conversion routine (and the XmNconvertCallback procedures, if any) of the widget that
		 owns the selection.  The type and length of parameters are target-specific.  If the target takes  no  parameters,  the  value	is
		 NULL.

       parm_fmt  Specifies  whether  the  data	in  parm should be viewed as a list of 8-bit, 16-bit, or 32-bit quantities.  Possible values are 0
		 (when parm is NULL), 8, 16, and 32.

       parm_length
		 Specifies the number of elements of data in parm, where each element has the number of bits specified by parm_fmt.  When parm	is
		 NULL, the value is 0.

       parm_type Specifies the type of parm.

RELATED

       XmTransferSendRequest(3), XmTransferStartRequest(3), and XmTransferValue(3).

													     XmTransferSetParameters(library call)
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