neocatfile.sh

   1 #!/usr/bin/env bash
   2
   3 function PackCatFile {
   4  shopt -s globstar
   5  declare -A inodetofile
   6  declare -i curinode=0
   7  numfiles=$(find "${1}" -mindepth 1 -type f,l,c,b,d,p -print | wc -l)
   8  printf 'CatFile1\x00%s\x00' "${numfiles}" > "${2}"
   9  tmpfile=$(mktemp)
  10
  11  for file in "${1}"/**; do
  12   [ -e "$file" ] || continue  # Skip if file doesn't exist
  13   fname="${file%/}"
  14   echo "${fname}"
  15   finfo=( $(stat -c "%i %f %X %Y %Z %T %t %u %g %U %G %h %s" "${fname}") )
  16   ftype=0; flinkname=""; fsize=0
  17   fcurinode=$curinode
  18   finode=${finfo[0]}
  19   fmode=${finfo[1]}
  20   fatime=$(printf "%x" ${finfo[2]})
  21   fmtime=$(printf "%x" ${finfo[3]})
  22   fctime=$(printf "%x" ${finfo[4]})
  23   fbtime=$(printf "%x" ${finfo[4]})  # Same as ctime in this script's context
  24   fdev_minor=$(printf "%x" ${finfo[5]})
  25   fdev_major=$(printf "%x" ${finfo[6]})
  26   fuid=$(printf "%x" ${finfo[7]})
  27   fgid=$(printf "%x" ${finfo[8]})
  28   funame=${finfo[9]}
  29   fgname=${finfo[10]}
  30   flinkcount=$(printf "%x" ${finfo[11]})
  31   fsizehex=$(printf "%x" ${finfo[12]})
  32
  33   case $(stat -c %F "${fname}") in
  34     'regular file') ftype=0 ;;
  35     'symbolic link') ftype=2; flinkname=$(readlink -f "${fname}") ;;
  36     'character special file') ftype=3 ;;
  37     'block special file') ftype=4 ;;
  38     'directory') ftype=5 ;;
  39     'fifo') ftype=6 ;;
  40   esac
  41
  42   if [ $ftype -eq 0 ] && [ -n "${inodetofile[$finode]}" ]; then
  43     ftype=1
  44     flinkname=${inodetofile[$finode]}
  45   else
  46     inodetofile[$finode]=$fname
  47     ((curinode++))
  48   fi
  49
  50   ftypehex=$(printf "%x" $ftype)
  51   finodehex=$(printf "%x" $finode)
  52   printf "%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00%s\x00" "$ftypehex" "$fname" "$flinkname" "$fsizehex" "$fatime" "$fmtime" "$fctime" "$fbtime" "$fmode" "$fuid" "$funame" "$fgid" "$fgname" "$fcurinode" "$finodehex" "$flinkcount" "$fdev_minor" "$fdev_major" "$fdev_minor" "$fdev_major" "0" > "$tmpfile"
  53
  54   # Calculate checksums
  55   if [ "${4}" == "none" ]; then
  56     echo -n "none\x00" > "$tmpfile"  # Writing directly to temporary file
  57     catfileheadercshex="0"
  58     catfilecontentcshex="0"
  59   elif [ -z "${4}" ] || [ "${4}" == "crc32" ]; then
  60     catfileheadercshex=$(crc32 "$tmpfile" | cut -d ' ' -f 1)
  61     catfilecontentcshex=$(if [ -f "$fname" ]; then crc32 "$fname"; else crc32 /dev/null; fi | cut -d ' ' -f 1)
  62   else
  63     checksum_command="${4}sum"
  64     catfileheadercshex=$($checksum_command "$tmpfile" | cut -d ' ' -f 1)
  65     catfilecontentcshex=$(if [ -f "$fname" ]; then $checksum_command "$fname"; else $checksum_command /dev/null; fi | cut -d ' ' -f 1)
  66   fi
  67
  68   cat "$tmpfile" >> "${2}"
  69   printf "%s\x00%s\x00" "$catfileheadercshex" "$catfilecontentcshex" >> "${2}"
  70   [ -f "$fname" ] && cat "$fname" >> "${2}"
  71   printf '\x00' >> "${2}"
  72  done
  73
  74  rm -f "$tmpfile"
  75
  76  case "${3}" in
  77    gzip) gzip --quiet --best "${2}" ;;
  78    bzip2) bzip2 --compress --quiet --best "${2}" ;;
  79    zstd) zstd -19 --rm -qq --format=zstd "${2}" ;;
  80    lz4) lz4 -9 -z --rm -qq "${2}" ;;
  81    lzo) lzop -9 -U -q "${2}" ;;
  82    lzma) lzma --compress --quiet -9 --extreme "${2}" ;;
  83    xz) xz --compress --quiet -9 --extreme "${2}" ;;
  84    brotli) brotli --rm --best "${2}" ;;
  85    *) echo "Unsupported compression method: ${3}" >&2 ;;
  86  esac
  87 }
  88
  89 PackCatFile "${1}" "${2}" "${3}" "${4}"