David C. Rankin wrote:
"Just which files do have embedded control characters (intentionally, and not as the result of some horrible mistake)?"
Generally speaking I'd expect to find nothing more than a 'tab' where someone meant a space. More paranoidly, I might see ^H where someone was trying overprint or even CR... In very special cases, I might see some of those space-control chars used in some sort of "README" type message encoded as the name(s) of files. BUT that's be more likely on some external storage media. More likely today, I'd use 001 first line 002 2nd line... etc... so they'd be sorted in text readable order. Unfortunately most of the control chars just don't do what you might want them to do across a wide variety of today's terminals... (like overprint)... ... Maybe "ESC" to embed some color code or other tty code?... so if you had an 'ls' w/o color turned on, you could have a directory "red green blue...etc" with each file in it's own color? How useful or widespread that would be would be another matter.
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