#!/bin/bash
pname="$(basename $0)"
pblan="${name//?/ }"

function usage () {
    echo "${pname} usage:"
    echo "    ${pname} log-file 'command args' word..."
}

if [ $# -lt 3 ] ; then
    echo "${pname} error: missing arguments."
    usage
    exit 1
fi


logfile="$1"
if [ ! -r "$logfile" ] ; then
    echo "${pname} error: cannot read the log file '${logfile}'."
    exit 1
fi

shift

cmdargs="$1"

shift
words="$@"

tail -f "${logfile}" \
| awk -v words="$words" -v cmdargs="${cmdargs}" '
BEGIN {
    split(words,wards);
}

{
    for(i in wards){
        if(0!=index($0,wards[i])){
            system(cmdargs);
            next;
        }
    }
}
'
#END#