examples/scripts.v2/arc2tarz

   1 #! /bin/bash
   2 #
   3 # original from:
   4 # arc2tarz: convert arced file to tarred, compressed form.
   5 # @(#) arc2tarz.ksh 1.0 92/02/16
   6 # 91/03/28 john h. dubois iii (john@armory.com)
   7 # 92/02/16 added -h option for help
   8 #
   9 # conversion to bash v2 syntax by Chet Ramey
  10
  11 unset ENV
  12 Usage="Usage: $0 arcfile [-hcg] [ tarzfile ]"
  13
  14 phelp()
  15 {
  16 echo "$Usage
  17 arcfile is the name of an arc file to convert to tarred, compressed form.
  18 The file must have a .arc extension, but only the base name needs to be
  19 given.  If no output file name is given, it will be created in the current
  20 directory with the name being the arcfile basename followed by .tar.EXT.
  21 If the -c option is given, compress will be used, and EXT will be Z.
  22 The default (also available with -g) is to use gzip, in which case EXT
  23 is gz.  If the basename is too long the extension may be truncated.  All
  24 uppercase letters in the names of files in the archive are moved to lowercase."
  25 }
  26
  27 compress=gzip
  28 ext=gz
  29
  30 while getopts "hcg" opt; do
  31         case "$opt" in
  32         h)      phelp; exit 0;;
  33         c)      compress=compress; ext=Z;;
  34         g)      compress=gzip ; ext=gz ;;
  35         *)      echo "$Usage" 1>&2 ; exit 2;;
  36         esac
  37 done
  38
  39 shift $((OPTIND - 1))
  40
  41 if [ $# = 0 ]; then
  42         phelp
  43         exit 0
  44 fi
  45
  46 [ -z "$TMP" ] && tmpdir=/tmp/arc2tarz.$$ || tmpdir=$TMP/arc2tarz.$$
  47
  48 case "$1" in
  49 *.arc)  arcfile=$1 ;;
  50 *)      arcfile=$1.arc ;;
  51 esac
  52
  53 if [ ! -f $arcfile ] || [ ! -r $arcfile ]; then
  54         echo "Could not open arc file \"$arcfile\"."
  55         exit 1
  56 fi
  57
  58 case "$arcfile" in
  59 /*)     ;;
  60 *)      arcfile=$PWD/$arcfile ;;
  61 esac
  62
  63 basename=${arcfile%.arc}
  64 basename=${basename##*/}
  65 [ $# -lt 2 ] && tarzname=$PWD/$basename.tar.$ext || tarzname=$2
  66
  67 trap 'rm -rf $tmpdir $tarzname' 1 2 3 6 15
  68
  69 mkdir $tmpdir
  70 cd $tmpdir
  71 echo "unarcing files..."
  72 arc -ie $arcfile
  73
  74 # lowercase
  75 for f in *; do
  76         new=$(echo $f | tr A-Z a-z)
  77         if [ "$f" != "$new" ]; then
  78                 mv $f $new
  79         fi
  80 done
  81
  82 echo "tarring/compressing files..."
  83 tar cf - * | $compress > $tarzname
  84 cd -
  85 rm -rf $tmpdir