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For all of these questions, you may NOT use: grep, sed, awk, or perl if, for, while, until, case, or read Do not use temporary
For all of these questions, you may NOT use: grep, sed, awk, or perl if, for, while, until, case, or read
Do not use temporary files unless explicitly instructed to do so.
Give a command that will run the program "bar" iff the variable "err" is not empty. The exit status of this command should be success iff "err" was empty, failure otherwise.
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