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Jovin Miranda
Asked: 2018-08-26 18:19:05 +0800 CST

Unable to use variables in alias in cshell

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This is a sample straight forward program. I am using C-shell and want a solution for this environment itself. Following this code sample:

set FILENAME = "\!:2"

alias jo 'echo this is my \!:1 file and its name is $FILENAME'

on command line when I give the following: 

jo first sample.txt

I should get the output as 

this is my first file and its name is sample.txt

instead I get

this is my first file and its name is !:2

The problem here is the symbol \ totally gets eliminated, I don't know how. That is needed if I want it to take the argument. Can anyone help out with this?

command-line environment-variables alias csh tcsh

1 Answers

  1. Best Answer

    To achieve the desired result, you should wrap the alias' second argument with double quotes, so the variable filename gets interpreted correctly:

    set FILENAME = "\!:2"
alias jo "echo this is my \!:1 file and its name is $FILENAME"

    Test case:

    % jo first sample.txt
this is my first file and its name is sample.txt
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