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#!/bin/bash
# modify interface sub-block
shopt -s extglob
if [[ "$*" == *--help* ]] ; then
echo ${0##*/} [test_]FILE INTERFACE HWID
exit 0
fi
if [[ "$1" == test_* ]] ; then
origfile=$1
bootfile=/tmp/${1##*/}_$$
cp $origfile $bootfile
trap "diff -c $origfile $bootfile; rm -f $bootfile; exit 0" $?
else
origfile=
bootfile=$1
fi
eth=$2
hwid=$3
sed -i '/^interfaces {$/,/^}$/ {
/^ ethernet '"$eth"' {$/ {
:join
/\n }$/ {
/hw-id: / s/\(hw-id:\) [0-9a-fA-F:]\+/\1 '"$hwid"'/
/hw-id: /! s/}$/ hw-id: '"$hwid"'\n }/
/link-detect/! s/}$/ link-detect\n }/
b
}
N
b join
}
}' $bootfile
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