Portable Cygwin: replacing drivename in a text file

[Fergus]

> I can't get the syntax quite right.
> Can anybody help, please? Thank you very much.

Thanks very much indeed for various suggestions, much appreciated. I
guess by yakking on about "drivename" I moved the focus of my question
to its practical application and thereby managed to blur things. My real
question is

Given the string 123 how can I use sed to change it to 1$HOME3 or, in my
case, 1/home/user3. Various combinations of ' " and ` (also arbitrary
separators) all fail as in

echo 123 | sed 's/2/"$HOME"/g'
echo 123 | sed 's/2/`$HOME`/g'
echo 123 | sed "s/2/'"$HOME"'/g"
echo 123 | sed 's/2/@$HOME@/g'

Thank you (again).

Fergus



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