bin/darwin/sed

   1 #!/bin/sh
   2 #
   3 # Sed portability notes
   4 # - SuSv3
   5 #    - Only -e, -f, and -n are standard options
   6 # - Linux
   7 #    - -i argument is of the form -i[ext]
   8 #    - extended regular expressions argument is -r
   9 # - Mac OSX
  10 #    - -i argument is of the form -i [ext]
  11 #    - extended regular expressions argument is -E
  12 #
  13 # Here we support a limited subset of the available sed capabilities,
  14 # ensuring that all those supported by this script can be utilized
  15 # regardless of the current platform.
  16 #
  17 # We accept -n, -e, -f, and -i with no backup extension.  We support
  18 # extended regular expressions using the -r argument.  Note that extended
  19 # regular expressions support may not be retained, depending upon the
  20 # capabilities of the other platforms we wish to support, and we may need
  21 # to reimplement -i internally in this script on some platforms.
  22
  23
  24 source $(dirname $0)/../wrapper.sh
  25
  26 case `uname -s` in
  27     Darwin)
  28         inplace_arg="-i ''"
  29         extended_re_arg="-E"
  30         getopt_os="ir"
  31         ;;
  32     Linux)
  33         inplace_arg="-i"
  34         extended_re_arg="-r"
  35         getopt_os="ir"
  36         ;;
  37 esac
  38
  39 saved=""
  40 while getopts ne:f:$getopt_os opt; do
  41     case "$opt" in
  42         n)
  43             save "-$opt"
  44             ;;
  45         e|f)
  46             save "-$opt"
  47             save "$OPTARG"
  48             ;;
  49         i)
  50             saved="$saved $inplace_arg"
  51             ;;
  52         r)
  53             saved="$saved $extended_re_arg"
  54             ;;
  55         \?)
  56             exit 1
  57             ;;
  58     esac
  59 done
  60 shift $(($OPTIND - 1))
  61 for arg; do
  62     save "$arg"
  63 done
  64
  65 exec_real