Quote a filename containing quotes and given as variable in Bash

Let’s say I have a directory path in variable DIR and I want to list this directory. If I care only about spaces in the path, then I could do

ls "$DIR"

What should I write if I want to support also single and double quotes and other weird stuff in the directory path? Example:

DIR="/Users/Mick O'Neil (the "Terminator")/Desktop"
echo $DIR # prints /Users/Mick O'Neil (the "Terminator")/Desktop
ls <what should I write here?>

Answer

Quotes are not just for spaces but for everything, so using the double quotes is the safety level you need here.

From Bash Reference Manual on Quoting:

3.1.2.3 Double Quotes

Enclosing characters in double quotes (‘”’) preserves the literal value of all characters within the quotes, with the exception of ‘$’, ‘`’, ‘’, and, when history expansion is enabled, ‘!’.

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Let’s store this string into a file for later usage.

$ cat file
Mick O'Neil (the "Terminator")

Read into a var:

$ filename=$(<file)

Check its value:

$ echo "$filename"
Mick O'Neil (the "Terminator")

Create a file with this value:

$ touch "$filename"

Check it has been created successfully:

$ lt "$filename"
-rw-r--r-- 1 me me 0 Mar  1 15:09 Mick O'Neil (the "Terminator")