src/cmd/INIT/filter.sh

   1 ########################################################################
   2 #                                                                      #
   3 #               This software is part of the ast package               #
   4 #          Copyright (c) 1994-2016 AT&T Intellectual Property          #
   5 #                      and is licensed under the                       #
   6 #                 Eclipse Public License, Version 1.0                  #
   7 #                    by AT&T Intellectual Property                     #
   8 #                                                                      #
   9 #                A copy of the License is available at                 #
  10 #          http://www.eclipse.org/org/documents/epl-v10.html           #
  11 #         (with md5 checksum b35adb5213ca9657e911e9befb180842)         #
  12 #                                                                      #
  13 #              Information and Software Systems Research               #
  14 #                            AT&T Research                             #
  15 #                           Florham Park NJ                            #
  16 #                                                                      #
  17 #               Glenn Fowler <glenn.s.fowler@gmail.com>                #
  18 #                                                                      #
  19 ########################################################################
  20 ########################################################################
  21 #                                                                      #
  22 #               This software is part of the ast package               #
  23 #          Copyright (c) 1994-2011 AT&T Intellectual Property          #
  24 #                      and is licensed under the                       #
  25 #                 Eclipse Public License, Version 1.0                  #
  26 #                    by AT&T Intellectual Property                     #
  27 #                                                                      #
  28 #                A copy of the License is available at                 #
  29 #          http://www.eclipse.org/org/documents/epl-v10.html           #
  30 #         (with md5 checksum b35adb5213ca9657e911e9befb180842)         #
  31 #                                                                      #
  32 #              Information and Software Systems Research               #
  33 #                            AT&T Research                             #
  34 #                           Florham Park NJ                            #
  35 #                                                                      #
  36 #               Glenn Fowler <glenn.s.fowler@gmail.com>                #
  37 #                                                                      #
  38 ########################################################################
  39 : convert command that operates on file args to pipeline filter
  40
  41 command=filter
  42
  43 tmp=/tmp/$command$$
  44 suf=
  45
  46 case `(getopts '[-][123:xyz]' opt --xyz; echo 0$opt) 2>/dev/null` in
  47 0123)   ARGV0="-a $command"
  48         USAGE=$'
  49 [-?
  50 @(#)$Id: filter (AT&T Labs Research) 2001-05-31 $
  51 ]
  52 '$USAGE_LICENSE$'
  53 [+NAME?filter - run a command in stdin/stdout mode]
  54 [+DESCRIPTION?\bfilter\b runs \acommand\a in a mode that takes input from
  55         the \afile\a operands, or from the standard input if no \afile\a
  56         operands are specified, and writes the results to the standard output.
  57         It can be used to run commands like \bsplit\b(1), that normally modify
  58         \afile\a operands in-place, in pipelines. The \afile\a operands are
  59         not modified; \acommand\a is run on copies in \b/tmp\b.]
  60
  61 command [ option ... ] [ file ... ]
  62
  63 [+SEE ALSO?\bstrip\b(1)]
  64 '
  65         ;;
  66 *)      ARGV0=""
  67         USAGE="command [ option ... ] [ file ... ]"
  68         ;;
  69 esac
  70
  71 usage()
  72 {
  73         OPTIND=0
  74         getopts $ARGV0 "$USAGE" OPT '-?'
  75         exit 2
  76 }
  77
  78 while   getopts $ARGV0 "$USAGE" OPT
  79 do      case $OPT in
  80         *)      usage ;;
  81         esac
  82 done
  83 shift `expr $OPTIND - 1`
  84 case $# in
  85 0)      usage ;;
  86 esac
  87
  88 cmd=$1
  89 while   :
  90 do      shift
  91         case $# in
  92         0)      break ;;
  93         esac
  94         case $1 in
  95         -*)     cmd="$cmd $1" ;;
  96         *)      break ;;
  97         esac
  98 done
  99 trap 'rm -f $tmp$suf' 0 1 2 3 15
 100 case $# in
 101 0)      cat > $tmp
 102         $cmd $tmp
 103         ;;
 104 *)      for file
 105         do      suf=${file##*/}
 106                 case $suf in
 107                 *.*)    suf=.${suf#*.} ;;
 108                 *)      suf= ;;
 109                 esac
 110                 cp $file $tmp$suf || exit 1
 111                 chmod u+rwx $tmp$suf || exit 1
 112                 $cmd $tmp$suf || exit 1
 113                 cat $tmp$suf
 114                 rm -f $tmp$suf
 115         done
 116         ;;
 117 esac