分兩個檔，一個叫 addpayload.sh, 一個叫 install.sh.in, 前者如下:
#!/bin/bash
# Check for payload format option (default is uuencode).
uuencode=1
if [[ "$1" == '--binary' ]]; then
binary=1
uuencode=0
shift
fi
if [[ "$1" == '--uuencode' ]]; then
binary=0
uuencode=1
shift
fi
if [[ ! "$1" ]]; then
echo "Usage: $0 [--binary | --uuencode] PAYLOAD_FILE"
exit 1
fi
if [[ $binary -ne 0 ]]; then
# Append binary data.
sed \
-e 's/uuencode=./uuencode=0/' \
-e 's/binary=./binary=1/' \
install.sh.in >install.sh
echo "PAYLOAD:" >> install.sh
cat $1 >>install.sh
fi
if [[ $uuencode -ne 0 ]]; then
# Append uuencoded data.
sed \
-e 's/uuencode=./uuencode=1/' \
-e 's/binary=./binary=0/' \
install.sh.in >install.sh
echo "PAYLOAD:" >> install.sh
cat $1 | uuencode - >> install.sh
fi
install.sh.in 是個樣本檔，template file, 最後會產生 install.sh 才是加了二進位內容的 shell script....原文有執行例，請自行前往觀看怎麼執行。
#!/bin/bash
uuencode=1
binary=0
function untar_payload()
{
match=$(grep --text --line-number '^PAYLOAD:$' $0 | cut -d ':' -f 1)
payload_start=$((match + 1))
if [[ $binary -ne 0 ]]; then
tail -n +$payload_start $0 | tar -tzvf -
fi
if [[ $uuencode -ne 0 ]]; then
tail -n +$payload_start $0 | uudecode | tar -tzvf -
fi
}
read -p "Install files? " ans
if [[ "${ans:0:1}" || "${ans:0:1}" ]]; then
untar_payload
# Do remainder of install steps.
fi
exit 0
