|Do you have any specific implementation examples of how to quote arbitrary characters to the shell in a system or open ?
I avoid situations where arbitrary characters have to be quoted. In the rare case where I have a CGI form that accepts something like a filename, I'll reject the name if it contains any funny characters. Trying to escape funny characters is a losing battle.
I also keep my filenames simple (using only alphanumerics, underscores, dashes, and periods).
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Want more info? How to link or
or How to display code and escape characters
are good places to start.