#! /bin/bash
# #############################################################################

       NAME_="rmword"
    PURPOSE_="remove words in a list from a text file"
   SYNOPSIS_="$NAME_ [-hl] -i <word_list> -o <file>"
   REQUIRES_="standard GNU commands, curl"
    VERSION_="1.0"
       DATE_="2004-06-19; last update: 2004-06-21"
     AUTHOR_="Dawid Michalczyk <dm@eonworks.com>"
        URL_="www.comp.eonworks.com"
   CATEGORY_="text"
   PLATFORM_="Linux"
      SHELL_="bash"
 DISTRIBUTE_="yes"

# #############################################################################
# This program is distributed under the terms of the GNU General Public License

usage () {

echo >&2 "$NAME_ $VERSION_ - $PURPOSE_
Usage: $SYNOPSIS_
Requires: $REQUIRES_
Options:
     -i, file with words to remove
     -o, file from which to remove the words
     -h, usage and options (this help)
     -l, see this script"
exit 2
}

# args check
[ $# -eq 0 ] && { echo >&2 missing argument, type $NAME_ -h for help; exit 2; }

# tmp file set up
tmp_1=/tmp/tmp.${RANDOM}$$

# signal trapping and tmp file removal
trap 'rm -f $tmp_1 >/dev/null 2>&1' 0
trap "exit 2" 1 2 3 15

# option and arg handling
while getopts hli:o: options; do

    case $options in

        i) inputf=$OPTARG ;;
        o) outputf=$OPTARG ;;
        h) usage ;;
        l) more $0; exit 2 ;;
       \?) echo invalid argument, type $NAME_ -h for help; exit 2 ;;

    esac

done
shift $(( $OPTIND - 1 ))

# file arg check
if [ ! $inputf ] || [ ! $outputf ]; then
    echo missing argument, type $NAME_ -h for help
    exit 2
fi

# main
sed -e 's/ //g' -e 's-^-/-g' -e 's-$-/d-' $inputf > $tmp_1
sed -f $tmp_1 $outputf