#!/bin/sh
#
# ${R_HOME}/bin/help

if [ "${1}" = "INDEX" ];
then
    subject=${2}
    shift 2
    for index in ${*}
    do
	if [ -f ${index} ];
	then
	    file=`grep "^${subject}	" ${index} | cut -f 2`
	    if test -n "${file}"
	    then
		echo `dirname ${index}`/${file}
		exit 0
	    fi
	fi
    done    
    echo
elif [ "${1}" = "PRINT" ];
then
    LATEX=${4}
    if [ "${LATEX}" = "false" ];
    then
	echo "Cannot print, latex seems to be unavailable"
	exit 1
    fi
    DVIPS=${5}
    if [ "${DVIPS}" = "false" ];
    then
	echo "Cannot print, dvips seems to be unavailable"
	exit 2
    fi
    shift
    ODIR=`pwd`
    cd `dirname ${1}`
    ${LATEX} "\\nonstopmode\\input{${1}}" >/dev/null 2>&1
    ${DVIPS} ${1} 2>/dev/null
    if test -f ${1}.ps;
    then
        echo "Saving help page to \`${2}.ps'"
        mv ${1}.ps ${ODIR}/${2}.ps
    fi
    rm -f ${1}.aux ${1}.dvi ${1}.log
fi