Are those command-line arguments safe?

Are those arguments safe? For this, I’m using bash, but the example I show has the same problem in csh and zsh. I’ve known about this for a long time because I’d show off in Perl classes by creating weird filenames with special or weird characters. This stuff didn’t show up in the “Secure Programming Techniques” chapter, but it’s been on my to-do list for a long time.

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