in reply to Re^2: Executing a string as a Perl command
in thread Executing a string as a Perl command

  1. ...and your point (aside from the fact that your code prints "5") is...?
  2. ... and this is better than 

    my $var1 = 5;
print $var1;

    [download]

    how?

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Re^4: Executing a string as a Perl command
by ctilmes (Vicar) on May 16, 2011 at 10:48 UTC
    This short illustrative example has $cmd set inline, but in a real program, it could be constructed from other variables, it could be read from a user, it could be read from a file, etc.

    The question was simply how to get it to execute once it was set. The answer is eval.

[reply]
      eval is the wrong answer since it can run arbitrary code

      If the user gives you some form of # rm -rf * ~ /, a lot of your files get deleted

[reply]
[d/l]
        The OP said nothing about a user supplying the string. We pointed out that there are security concerns if you don't trust the string.

        If you want to run arbitrary code supplied by a 100% trusted source at runtime, what would you use other than eval?

[reply]

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