Sourcing .cshrc (C shell) environment variables to bash

Shell Programming and Scripting
1

I have tried with the following:

csh -c 'source ~/.cshrc; exec bash' # works perfectly
(cat ~/.cshrc; echo exec bash) | csh # not working

And, using sed, I successfully retrieved the environment variables from ~/.cshrc

sed -rn 's/setenv\s+(\S+)\s+(.*)$/export \1=\2/p' ~/.cshrc

but now stuck-up in sourcing it to the bash environment, where the below solutions do not work :frowning:

sed -rn 's/setenv\s+(\S+)\s+(.*)$/export \1=\2/p' ~/.cshrc | bash
source /dev/stdin < <(sed -rn 's/setenv\s+(\S+)\s+(.*)$/export \1=\2/p' ~/.cshrc)
2

You are over complicating things. Why not just write the variables out to a temporary file and source that temporary file?

Even simpler, just write a .myownfile containing the variables and source that file.

3

True, but would like to explore new stuffs :slight_smile:

Could anyone correct my code?

4

.cshrc is automatically sourced

csh -c 'exec bash'

You need eval

eval $(
sed -rn 's/^\s*setenv\s+(\S+)\s+/export \1=/p' ~/.cshrc
)
1 Like
5

Awesome!! :), so can I do anything for this piece of code

(cat ~/.cshrc; echo exec bash) | csh

in order to make it work?

6

...being it's just a more complicated version of what he did in one parameter, why? What's your goal here?

7

Using grep move all setenv statements into, say, .setenv. Next, add the following to your .bashrc:

setenv() { export $1="$2"}
. ~/.setenv

Edit your .cshrc file and comment out or delete your setenv statements, and add

source ~/.setenv

(or whatever the correct syntax is).

From now on keep all your environment definitions in .setenv and both csh and bash will be able to use them.

Andrew