The diamond operator, however, happily uses two-argument open to processes the contents of the @ARGV array, which by default contains the command line arguments supplied by the user. This means, that an argument "< foo" makes my program read a file named "foo", an argument "> foo" makes it clobber a file named "foo", and an argument "rm * |" makes it run a program that on my platform happens to remove every file in the current directory.

I don't get this.

You (or someone) is using a "unix filter" perl script at the command line.

You are concerned that you (or they) might accidentally (or maliciously) type a dangerous command in place of a filename as input to that script.

What is to stop you (or they) from entering that command directly into the command prompt you (or they) are using?

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

RIP Neil Armstrong

In reply to Re: Good-bye Unix filter idiom by BrowserUk
in thread Good-bye Unix filter idiom by martin

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