The following will print the output as its produced: 
while (<COUT>) {
    print;
}

[download]

Well, it prints it a line at a time. sysread can truly get it as its produced.

Of course, plink might buffer its output. Lots of applications do when they're output isn't a terminal. If it does, you'll have to look if it provides a way to be told not to.

In reply to Re^3: assign open2 output to variable by ikegami
in thread assign open2 output to variable by adrivez

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