exec 'perl -e "print map {qq!\t$_\n!}"',@_

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will fail with ENOENT (No such file or directory) when @_ isn't empty. When using the multiple argument form of exec the first argument is to be the program to execute. There's no file named perl -e "print map {qq!\t$_\n!}", much less a program.

And when @_ is empty, you have a different problem. perl will run, but the shell will have replaced $_ with something else due to improper quoting.

The solution to both is: 

exec 'perl', '-e', 'print map {qq!\t$_\n!}', @_

[download]

Are these the problems you were asking about?

PS — If you had a problem with exec, you should have checked what error exec returned.

In reply to Re: become another via exec in dispatch table by ikegami
in thread become another via exec in dispatch table by Discipulus

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