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   1 #!/bin/sh
   2
   3 header=
   4 while :
   5 do
   6         case $# in 0) break ;; esac
   7         case "$1" in
   8         -b)     header=Bcc ;;
   9         -c)     header=Cc ;;
  10         -*)     echo >&2 "Unknown option $1"
  11                 exit 1 ;;
  12         *)      break ;;
  13         esac
  14         shift
  15 done
  16
  17 case $# in
  18 0) match='*' ;;
  19 1) match="*$1*"; shift ;;
  20 esac
  21 for p
  22 do
  23         match="$match|*$p*"
  24 done
  25
  26 {
  27 iis=
  28 iis2=',
  29  '
  30 while read address name
  31 do
  32         case "$name" in
  33         $match) ;;
  34         *)      continue ;;
  35         esac
  36         item="$name <$address>"
  37         if test -z "$header"
  38         then
  39                 echo "$iis$item"
  40         elif test -z "$iis"
  41         then
  42                 printf "$header: $item"
  43                 iis="$iis2"
  44         else
  45                 printf "$iis$item"
  46         fi
  47 done
  48 if test -n "$header"
  49 then
  50         printf '\n'
  51 fi
  52 } <<\EOF
  53 linux-kernel@vger.kernel.org    Linux Kernel
  54 info@lwn.net                    LWN.NET
  55 emacs-orgmode@gnu.org           Emacs Org Mode
  56 EOF