#!/bin/sh
# mkconsole - Setup Console Helper to run something with Super User Privileges
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

# Be warned that running anything as root is dangerous and could damage your system.

# Script Name and Version
MYNAME=mkconsole
VERSION="$Id: mkconsole,v 1.4 2004/04/20 00:17:00 kg9ae Exp $"

# Where to place consolehelper symlink.
OUTBINDIR=${ROOTDIR}/usr/bin

# You risk very bad mojo if you edit below here.
PAMD=${ROOTDIR}/etc/pam.d
CONSOLEAPPS=${ROOTDIR}/etc/security/console.apps
DESKLAUNCHDIR=${ROOTDIR}/usr/share/applications

function usage()
{
	echo "${MYNAME} Copyright (c) 2004 David L Norris <dave@webaugur.com>"
	echo ""
	echo "Usage: ${MYNAME} <source> <target>"
	echo "   Ex: ${MYNAME} /usr/bin/nautilus nautilus-super"
	echo " "
	exit 1
}

# this script must be run as root
if [ ${UID} != 0 ]; then
	echo "${MYNAME}: Must be run as root."
	echo "  Ex: sudo ${MYNAME} /usr/bin/nautilus nautilus-super"
	echo " "
	usage
fi

# we must have two arguments
if [ "x${1}" = "x" ];then
	usage
fi
if [ "x${2}" = "x" ];then
        usage
fi

# source and target executables
SOURCE="${1}"
BINDIR=`dirname "${1}"`
TARGET=`basename "${2}"`

# We need this for PAM.
if [ "x${BINDIR}" = "x." ]; then
	echo "${MYNAME}: Error: You must supply an absolute filename as the source." 1>&2
	exit 2
fi

# source must exist
if [ ! -x "${SOURCE}" ]; then
	echo "${MYNAME}: Error: No executable named \"${SOURCE}\" was found." 1>&2
	exit 3
fi

# target must not exist 
if [ -e "${OUTBINDIR}/${TARGET}" ]; then
	echo "${MYNAME}: Error: Target \"${OUTBINDIR}/${TARGET}\" already exists!" 1>&2
	exit 4
fi

# PAM Authentication must not exist
if [ -e "${PAMD}/${TARGET}" ]; then
        echo "${MYNAME}: Error: PAM Authentication data \"${PAMD}/${TARGET}\" already exists!" 1>&2
        exit 5
fi

# Console app must not exist
if [ -e "${CONSOLEAPPS}/${TARGET}" ]; then
        echo "${MYNAME}: Error: Console App \"${CONSOLEAPPS}/${TARGET}\" already exists!" 1>&2
        exit 6
fi

# With some luck all is well in the universe beyond this point.
ln -s consolehelper "${OUTBINDIR}/${TARGET}"

# check for errors
STATUS=$?
if [ $STATUS -ne 0 ]; then
	echo "${MYNAME}: Error: Unable to create \"${OUTBINDIR}/${TARGET}\" symlink" 1>&2
	exit 7
fi

# Write our PAM authentication configuration
echo "#%PAM-1.0
auth       sufficient   pam_rootok.so
auth       sufficient   pam_timestamp.so
auth       required     pam_stack.so service=system-auth
session    required     pam_permit.so
session    optional     pam_xauth.so
session    optional     pam_timestamp.so
account    required     pam_permit.so" > "${PAMD}/${TARGET}"

# check for errors
STATUS=$?
if [ $STATUS -ne 0 ]; then
        echo "${MYNAME}: Error: Unable to create \"${PAMD}/${TARGET}\"" 1>&2
        exit 7
fi

# write console application config
echo "USER=root
PROGRAM=${SOURCE}
SESSION=true" > "${CONSOLEAPPS}/${TARGET}"

# check for errors
STATUS=$?
if [ $STATUS -ne 0 ]; then
        echo "${MYNAME}: Error: Unable to create \"${CONSOLEAPPS}/${TARGET}\"" 1>&2
        exit 8
fi

# Create Desktop Entry in System Tools - This is tricky so we'll try to err on the side of caution.

# Find the desktop launcher if it exists
FINDWHAT=`basename ${SOURCE}`
DESKTOPLAUNCH=`grep "^Exec=${FINDWHAT}$" /usr/share/applications/* | cut -d: -f1`
if [ "x${DESKTOPLAUNCH}" = "x" ]; then
	# No Launcher was found
        exit 10
fi
# echo "${MYNAME}: INFO: Found desktop launcher at \"${DESKTOPLAUNCH}\""
                                                                                                                             
# Give it a new name. FIXME: Only supports renaming C locale
DESKTOPNAME="`grep "^Name=" "${DESKTOPLAUNCH}" | cut -d= -f2` (Super User)"

# Get the original launcher file name.
DESKFILEORIG=`basename "${DESKTOPLAUNCH}"`
# Determine the new launcher file name
DESKFILENEW="${DESKLAUNCHDIR}/${MYNAME}-${DESKFILEORIG}"

# Install the new desktop launcher under the "System Tools" menu.
desktop-file-install --vendor="${MYNAME}" --remove-key=Exec --remove-key=Name --remove-key=Categories "${DESKTOPLAUNCH}" "${DESKFILENEW}"
                                                                                                                             
# Was file created?
if [ ! -e  "${DESKFILENEW}" ]; then
	echo "${MYNAME}: ERROR: Desktop launcher was not created at \"${DESKFILENEW}\"." 1>&2
	exit 11
fi
                                                                                                                             
# Wouldn't it be great if this could be done with desktop-file-install...
echo "Exec=${TARGET}
Name=${DESKTOPNAME}
Categories=GNOME;Application;System;Utility;X-Red-Hat-Base;
" >> "${DESKFILENEW}"

echo "${MYNAME}: INFO: Created \"${DESKTOPNAME}\" launcher under the \"System Tools\" menu."

# Yay, we have finished.