examples/scripts.v2/uuenc

   1 #! /bin/bash
   2 #
   3 # original from:
   4 # @(#) uuenc.ksh 1.0 93/09/18
   5 # 93/09/18 john h. dubois iii (john@armory.com)
   6 #
   7 # conversion to bash v2 syntax by Chet Ramey
   8
   9 istrue()
  10 {
  11         test 0 -ne "$1"
  12 }
  13
  14 isfalse()
  15 {
  16         test 0 -eq "$1"
  17 }
  18
  19 phelp()
  20 {
  21 echo "$name: uuencode files.
  22 $Usage
  23 For each filename given, $name uuencodes the file, using the final
  24 component of the file's path as the stored filename in the uuencoded
  25 archive and, with a .${SUF} appended, as the name to store the archive in.
  26 Example:
  27 $name /tmp/foo
  28 The file /tmp/foo is uuencoded, with \"foo\" stored as the name to uudecode
  29 the file into, and the output is stored in a file in the current directory
  30 with the name \"foo.${SUF}\".
  31 Options:
  32 -f: Normally, if the file the output would be stored in already exists,
  33     it is not overwritten and an error message is printed.  If -f (force)
  34     is given, it is silently overwritten.
  35 -h: Print this help."
  36 }
  37
  38 name=${0##*/}
  39 Usage="Usage: $name [-hf] <filename> ..."
  40 typeset -i force=0
  41
  42 SUF=uu
  43
  44 while getopts :hf opt; do
  45     case $opt in
  46     h)  phelp; exit 0;;
  47     f)  force=1;;
  48     +?) echo "$name: options should not be preceded by a '+'." 1>&2 ; exit 2;;
  49     ?)  echo "$name: $OPTARG: bad option.  Use -h for help." 1>&2 ; exit 2;;
  50     esac
  51 done
  52
  53 # remove args that were options
  54 shift $((OPTIND - 1))
  55
  56 if [ $# -lt 1 ]; then
  57     echo "$Usage\nUse -h for help." 1>&2
  58     exit
  59 fi
  60
  61 for file; do
  62     tail=${file##*/}
  63     out="$tail.${SUF}"
  64     if isfalse $force && [ -a "$out" ]; then
  65         echo "$name: $out: file exists.  Use -f to overwrite." 1>&2
  66     else
  67         uuencode $file $tail > $out
  68     fi
  69 done