Backticks, like two-argument pipe opens, share the same problem: Undefined default shell behaviour. See Re: Ssh and qx. Using a perl SSH agent would entirely avoid the subprocess and the default shell. For a cross-platform, core-only solution, "Safe pipe opens" in perlipc explains how to avoid the default shell. The main trick in this case is to open STDIN from /dev/null in the child, then use multi-argument exec to prevent any interaction with the default shell.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: Odd perl/ssh interaction by afoken
in thread Odd perl/ssh interaction by mlf

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