websockify/rebind

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#!/usr/bin/env bash
usage() {
echo "Usage: $(basename $0) OLD_PORT NEW_PORT COMMAND_LINE"
echo
echo "Launch COMMAND_LINE, but intercept system calls to bind"
echo "to OLD_PORT and instead bind them to localhost:NEW_PORT"
exit 2
}
# Parameter defaults
mydir=$(readlink -f $(dirname ${0}))
export REBIND_PORT_OLD="${1}"; shift
export REBIND_PORT_NEW="${1}"; shift
LD_PRELOAD=${mydir}/rebind.so "${@}"