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#!/bin/sh bridge_parse_ports() { while [ x"${1+set}" = xset ] do # For compatibility: the `all' option. case $1 in all) shift && set regex eth.\* em.\* 'p[0-9].*' noregex "$@" ;; esac # Primitive state machine... case $1-`uname -s` in regex-Linux) all_interfaces=`sed -n 's%^[\ ]*\([^:]*\):.*$%\1%p' < /proc/net/dev` shift ;; regex-*) echo -n "$0 needs to be ported for your `uname -s` system. " >&2 echo "Trying to continue nevertheless." >&2 shift ;; noregex-*) all_interfaces= unset all_interfaces shift ;; esac case ${all_interfaces+regex}-${1+set} in regex-set) # The following interface specification are to be parsed as regular # expressions against all interfaces the system provides. i=`egrep "^$1$" << EOAI $all_interfaces EOAI ` shift ;; *-set) # Literal interfaces. i=$1 shift ;; *) # No interface specification is following. i= ;; esac echo $i done }
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