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Full Discussion: Check if a variable has a value assigned?
Top Forums Shell Programming and Scripting Check if a variable has a value assigned? Post 302312841 by sumeet on Sunday 3rd of May 2009 07:36:41 PM
Old 05-03-2009
Check if a variable has a value assigned?
Hi,

I want to check if a variable has a value assigned to it or not.

I can do following -

Code:
cat $Var > File1
if [ -s File1 ]
then
      echo "$Var has value"
else
      echo "$Var is null"
fi

But I have to check for 3 Variables and I want to wrap it up in couple of unix statements.

Any suggestion is appreciated.

Thanks
Sumeet
 

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LEARN ABOUT DEBIAN

ir_ab_names

IR_AB_NAMES(1)															    IR_AB_NAMES(1)

NAME

       ir_ab_names - a standalone server that supports the CORBA COS Interface specification.

SYNOPSIS

       ir_ab_names -file filename

       The -file switch is optional, see the OPTIONS section for details.

DESCRIPTION

       ir_ab_names(1) is a standalone server that supports the CORBA COS Interface specification. When launched, it returns its IOR and corbaloc,
       which can then be used by other CORBA applications.

OPTIONS

       ir_ab_names(1) accepts the following options:

       -file
	   Output COS Interface IOR to filename.

       -help
	   Print the usage text.

       all PolyORB command line configuration variables
	   PolyORB allows one to set up configuration variables on the command line. The syntax is close to the one described in configuration
	   files. A variable Var.Iable in section [Sec] can be overridden with flag --polyorb-<sec>-<var>-<iable>[=<value>].

AUTHOR

       This manual page was written by Reto Buerki <reet@codelabs.ch> for the Debian GNU/Linux system (but may be used by others).

RESOURCES

       Polyorb User Manual: http://www.adacore.com/wp-content/files/auto_update/polyorb-docs/polyorb_ug.html/

SEE ALSO

       po_cos_naming(1), po_cos_naming_shell(1).

								    05/21/2009							    IR_AB_NAMES(1)
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