Shell Programming and Scripting

Hi there,

I have included an external properties file into my BASH script via the 'source' command.

I am attempting to dynamically assign a variable in the BASH script, that references the variable name within the external properties file i.e.

#!/bin/bash
pth=${0%/*}
source $pth/common_refs.txt
source $pth/common_variables.txt

echo $env <----- variable from 'common_variables' which returns fine

returned value is 'prd_trs'

echo $prd_trs_ldaphost <---------- variable from 'common_refs' which returns fine

HOWEVER

echo $env"_ldaphost" <-------- this I expect to return the same value as $prd_trs_ldaphost from 'common_refs' file, but instead just echos:

'prd_trs_ldaphost'

Why is this happening and please can anyone suggest a work around?

Many thanks.

Try:

Code:

eval echo \$$env"_ldaphost"

bash, other way

Code:

V=${env}_ldaphost
echo ${!V}

Code:

eval echo "\$${env}_ldaphost"
HOWEVER