#!/bin/sh
PROGNAME=`basename $0`
VERSION="$Id: config,v 1.3 1994/06/12 12:55:54 root Exp $"

CONFIG_DIR=/homes/ops/lib/config
MACLIST_FILE=$CONFIG_DIR/maclist
CPPVERS_DIR=$CONFIG_DIR/cpp
TRANSTBL_FILE=$CONFIG_DIR/trans

TMP_FILE=/tmp/$PROGNAME.tmp.$$
REBUILDLST_FILE=/tmp/$PROGNAME.rbld.$$

list()
{
    cat $MACLIST_FILE
    exit 0
}

debug()
{
    [ "$DEBUG_FLAG" = false ] && return
    echo "$PROGNAME: DEBUG: $@"
}

verbose()
{
    [ "$VERB_FLAG" = false ] && return
    echo "$@"
}

fatal()
{
    echo "$PROGNAME: ERROR: $@" >&2
    exit 1
}

warning()
{
    echo "$PROGNAME: WARNING: $@" >&2
}

usage()
{
    #  -q is quiet
    #  -r is reboot
    echo "Usage: $PROGNAME [ -q ] [ -r ] [ -enable_mouse | -disable_mouse ] [ -enable_getty_on_s1 | -disable_getty on_s1 ]" 1>&2
    exit 1
}

add()
{
    ( grep -v $1 $MACLIST_FILE; echo "#define $1" ) > $TMP_FILE
    mv $TMP_FILE $MACLIST_FILE
    ( grep -l $1 $CPPVERS_DIR/*; [ -f $REBUILDLST_FILE ] && cat $REBUILDLST_FILE ) | sort -u > $TMP_FILE
    mv $TMP_FILE $REBUILDLST_FILE
}

minus()
{
    ( grep -v $1 $MACLIST_FILE; echo "#undef $1" ) > $TMP_FILE
    mv $TMP_FILE $MACLIST_FILE
    ( grep -l $1 $CPPVERS_DIR/*; [ -f $REBUILDLST_FILE ] && cat $REBUILDLST_FILE ) | sort -u > $TMP_FILE
    mv $TMP_FILE $REBUILDLST_FILE
}

main()
{
    #  Set default values for options
    REBOOT_FLAG=false
    VERB_FLAG=true
    DEBUG_FLAG=false

    #  Process options
    while [ "X$1" != "X" ]; do
        case "$1" in
     
            +MULTI_VC)     	  add MULTI_VC ;;

            -MULTI_VC)    	  minus MULTI_VC ;;

            +XDM)          	  add XDM 
				  minus GETTY_ON_S1 ;;

            -XDM)	          minus XDM ;; 

            +SELECTION_ON_S1)     add SELECTION_ON_S1
                                  minus GETTY_ON_S1 ;;

            -SELECTION_ON_S1)     minus SELECTION_ON_S1 ;;
    
            +GETTY_ON_S1)         add GETTY_ON_S1
                                  minus SELECTION_ON_S1 
				  minus XDM ;;
    
            -GETTY_ON_S1)         minus GETTY_ON_S1 ;;
    
            -r)		          REBOOT_FLAG=true ;;
    
            -d)                   DEBUG_FLAG=true ;;
    
            -q)                   VERB_FLAG=false ;;
    
            -l)			  list ;;

            -?)			  manual ;;

            -*)                   usage ;;
    
            *)		          break ;;
        esac
        shift
    done
    
    #  No words are supplied, only options
    [ "$1" ] && usage

    [ ! -r $TRANSTBL_FILE ] && fatal "$TRANSTBL_FILE: can't read"

    rebuild
    [ "$REBOOT_FLAG" = "true" ] && { sync; sync; sync; /etc/shutdown -r -q now; }
    exit 0
}

rebuild()
{
    [ ! -f $REBUILDLST_FILE ] && { warning "No rebuilds necessary"; return; }
    [ ! -r $REBUILDLST_FILE ] && fatal "$REBUILDLST_FILE: can't read"
    [ ! -s $REBUILDLST_FILE ] && fatal "$REBUILDLST_FILE: empty!"
    
    for CPP_FILE in `cat $REBUILDLST_FILE`; do
        BASE_CPP_FILE=`basename $CPP_FILE`
        set X `grep "^$BASE_CPP_FILE:" $TRANSTBL_FILE | sed 's/:/ /g'`
        [ ! "$2" ] && { warning "no translation for file $BASE_CPP_FILE"; continue; }
        REAL_FILE=$3
        REAL_FILE_OWNER=$4
        REAL_FILE_GROUP=$5
        REAL_FILE_PERMS=$6
        debug "REAL_FILE is $REAL_FILE"
        verbose -n "Rebuilding $REAL_FILE ... "
        #  Beware that cpp strips blank # lines
        /lib/cpp -P -C -undef -imacros $MACLIST_FILE $CPP_FILE > $REAL_FILE
        chown $REAL_FILE_OWNER.$REAL_FILE_GROUP $REAL_FILE
        chmod $REAL_FILE_PERMS $REAL_FILE
        verbose "done"
    done
}

manual()
{
    cat <<EOF
$PROGNAME version $VERSION
EOF
    less $PROGNAME
    exit 1
}

main "$@"