把二進位內容放進 shell script

貼過一篇 把文字檔放進 C 執行檔中。記得曾貼過類似下面的文章將二進位內容放進 shell 中，有興趣的人請看舊作建立自解壓檔一文，現在再來貼一次作法類似的文章。

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