Shell Programming and Scripting

OK, but this would only make sense if "search-engine" would be a variable with some content. This is not the case (and can't be, see above), so i still do not understand how this eval-construct came to pass.

Could you please explain:

where your values come from (say: a file, a network stream, whatever)
what you want to accomplish (in terms of goals, not techniques)

I am sure we could suggest a better method to accomplish what you want to do then what you came up with right now.

I hope this helps.

bakunin

Hi Bakunin,


The value of HAPROXY_LISTENER_NAME is "search-engine" and just search-engine doesnt makes any sense it gets combined with HAPROXY_LISTENER
& PORT to form a variable HAPROXY_LISTENER_search-engine_PORT.This variable is exported and has a value so that it could be fetched.

You have restated the method you have chosen to solve your goal. Not your goal.

No it cannot. The command:

Code:

export HAPROXY_LISTENER_search-engine_PORT

is used to export variables, but the above command returns the following diagnostic:

Code:

export: HAPROXY_LISTENER_search-engine_PORT: is not an identifier

In the shell command language, in the C programming language, in the FORTRAN programming language, in the awk programming language, and in hundreds of other languages, "-" is not a valid character in a variable name.

If you are using a language where HAPROXY_LISTENER_search-engine_PORT is a valid variable name and you want to write a shell script to create names like this to be included in source code for that language, we can write shell scripts to do that. We cannot write a shell script that can use HAPROXY_LISTENER_search-engine_PORT as a shell variable name.