As for the '&', that's for the shell to run the command in the background

Again, why? That shell is never going to run anything but rsh, so why run rsh "in the background"? At best, it does nothing. At worse, the shell exits before rsh does and you can't collect the info from rsh and the remote process.

In fact, I think a shell won't even get loaded without the & because the command contains no shell meta characters. So at best, & slows down the program and hides the PID of rsh.

In reply to Re^3: shell redirect CGI failure by ikegami
in thread shell redirect CGI failure by gryf

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