Shell Programming and Scripting

Hello,
I am having problem in setting current working directory from shell.
I want to set pwd as an environmental variable in a script. I am following an existing script which is defined as
HOME=$(shell dirname `pwd`)
C_HOME=$(shell echo $(HOME) | sed -e 's:\/:\\\/:g' )

But when I am trying to execute them, i am getting error:
shell: command not found

Please help.

It looks to me like you are leterally following an example out of a book of from a web page that wasn't ment to be copied verbatim.

HOME=$(pwd) would be more correct

Is it possible to use the terminology of .. $(shell ....
The reason I am asking you is...I want to implement these two below and I am not able to do so:

C_HOME=$(shell echo $(HOME) | sed -e 's:\/:\\\/:g' )
BH_HOME=$(shell rpm --showrc | grep macrofiles | sed -e 's/:/:$(C_HOME)/g' | sed -e 's/^\/usr/$(C_HOME)\/usr/' )

I think you are confused. You need not run it as:

Code:

$(shell...

It is just

Code:

$(<what ever command...>)

Make sure that you are using bash or ksh.