#!/bin/bash
# /usr/bin/sentry
# This is the executable wrapper for the libsentry.so library
# sentry/libsentry is a fork of the installwatch library and program

#set -x

PREFIX=/usr/libexec/src2pkg

HACK="PREFIX"
HACK="#$HACK#";

if test "$PREFIX" = "$HACK" ; then
	echo 'This script has not been installed'
	echo 'Please run "make install"'
	exit 1
fi

LIBDIR=$PREFIX/lib

BASE_TMP_DIR=/tmp

LIBSENTRY_VERSION=0.6.7.6

#
# ##############################################################################
#
# Function definitions
#
#

function ckversion {
	echo
	echo -n "sentry $LIBSENTRY_VERSION "
	echo	"(formerly known as installwatch)"
	echo    "Copyright 1998 Pancrazio de Mauro"
	echo    "Copyright 2002 Felipe Eduardo Sanchez Diaz Duran"
	echo	"Copyright 2002 Olivier Fleurigeon"
	echo	"Copyright 2007-2009 Gilbert Ashley"
	echo    "           This software is released under the GNU GPL."
}

function usage() {

	(
	ckversion
	echo
	echo "Usage: sentry[options] [command [command arguments]]"
	echo "Options:"
	echo
	echo "-r, --root=<rootdir>           Sets the directory under which will be stored "
	echo "                               meta-infos and translated files. "
	echo "-t, --transl=<yes|no>          Toggle translation capabilities "
	echo "-b, --backup=<yes|no>          Toggle backup capabilities "
	echo "-e, --exclude=<dir1,...,dirN>  Sets a neutral directory list, that won't be"
	echo "                                concerned by translation or backups. "
	echo "-o, --logfile=<logfile>        Sets the log file to be used. "
	echo "-d, --dbgfile=<dbgfile>        Sets the debug file to be used. "
	echo "-v, --dbglvl=<dbglvl>          Sets the debug level to be used. "
	)
	exit 1
}		

function help_notice() {
	echo
	echo "Use --help or -h to get more information"
	echo
	exit 1 
}

function boolean_usage() {
	echo
	echo "$2 is an invalid value for $1" 
	help_notice
	exit 1
}

function make_temp {
	local mkt_refdir=$1
	local mkt_wrkdir=""

	mkt_wrkdir=${BASE_TMP_DIR}/\
`awk 'BEGIN {\
	srand();\
	for (i=1;i<21;i++) {\
		a=95;\
		while (a > 90 && a < 97) {\
			a=65+int(50*rand())\
		};\
		printf("%c", a) \
	}\
}'`
	
	[ -e "${mkt_wrkdir}" ] && rm -rf ${mkt_wrkdir}
	if [ -e "${mkt_wrkdir}" ]; then 
		echo
		echo "Error : My temp dir exists already. This looks like a symlink attack!"
		echo 
		echo "*** Aborting ***"
		echo
		exit 1
	fi	

	mkdir ${mkt_wrkdir}
	chmod 0700 ${mkt_wrkdir}

	eval $mkt_refdir=\$mkt_wrkdir
}

#
#
# Function definitions
#
# ##############################################################################
#

#
# ##############################################################################
#
# Options and arguments parsing and validation
#
#

CKNAME=`basename $0`
PARAMS=`getopt -a -n $CKNAME -o +r:e:o:d:v:tb -l root:,transl:,backup:,exclude:,logfile:,dbgfile:,dbglvl:,help,version,copyright -- "$@"`

[ $? -gt 0 ] && help_notice

eval set -- $PARAMS

unset INSTW_ROOTPATH
unset INSTW_TRANSL
unset INSTW_BACKUP
unset INSTW_LOGFILE
unset INSTW_DBGFILE
unset INSTW_DBGLVL
unset INSTW_EXCLUDE

while [ "$1" != "--" ]; do
	case "$1" in
		-h|-H|--help)
			usage;;
		--version)
			echo "$LIBSENTRY_VERSION";;
		-r|--root)
			shift
			INSTW_ROOTPATH=`eval echo $1` 
			;;
		-e|--exclude)
			shift
			INSTW_EXCLUDE=`eval echo $1`
			;;
		-o|--logfile)
			shift
			INSTW_LOGFILE=`eval echo $1`
			;;
		-d|--dbgfile)
			shift
			INSTW_DBGFILE=`eval echo $1`
			;;
		-v|--dbglvl)
			shift
			INSTW_DBGLVL=`eval echo $1`
			;;
		-t)
			INSTW_TRANSL=1
			;;
		--transl)
			shift
			case `eval echo $1` in
				"1"|"yes"|"")
					INSTW_TRANSL=1
					;;
				"0"|"no")
					INSTW_TRANSL=0
					;;
				*)
					boolean_usage "--transl" $1
			esac
			;;
		-b)
			INSTW_BACKUP=1
			;;
		--backup)
			shift
			case `eval echo $1` in
				"1"|"yes"|"")
					INSTW_BACKUP=1
					;;
				"0"|"no")
					INSTW_BACKUP=0
					;;
				*)
					boolean_usage "--backup" $1
			esac
			;;
		--copyright|--version)
			cat << EOF

Copyright (C) 1998 Pancrazio `Ezio' de Mauro <p@demauro.net>
Copyright (C) 2002 Felipe Eduardo Sanchez Diaz Duran <izto@asic-linux.com.mx>
Copyright (C) 2002 Olivier Fleurigeon <olivier.fleurigeon@cegedim.fr>
Copyright (C) 2007-2009 Gilbert Ashley <amigo@ibiblio.org>

    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 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., 675 Mass Ave, Cambridge, MA 02139, USA.

EOF
			exit 0
			;;
	esac
	shift
done

  #
  # ##############################################
  #

  # do we have an installation process command
shift
if [ "$1" = "" ]; then
	echo
	echo "Error : You must specify a command !!!"
	echo
	usage
	exit 1
fi

if [ -u "$1" ]; then
	echo "Warning: `basename $0` may not work with suid programs" 
fi
  # we must have a root path defined
if [ "${INSTW_ROOTPATH}_" = "_" ]; then
	make_temp "INSTW_ROOTPATH"
	echo
	echo "INFO : Using a default root directory : ${INSTW_ROOTPATH}"
	echo
fi
if [ ! -d "${INSTW_ROOTPATH}" ]; then
	echo
	echo "The root directory is mandatory ."
	echo
	usage
	exit 1
fi
if [ "${INSTW_ROOTPATH:((${#INSTW_ROOTPATH}-1)):1}" = "/" ]; then
	INSTW_ROOTPATH="${INSTW_ROOTPATH%/}"
fi

export INSTW_ROOTPATH

if [ "${INSTW_BACKUP}_" = "_" ]; then
	INSTW_BACKUP=0;
fi	
export INSTW_BACKUP

if [ "${INSTW_TRANSL}_" = "_" ]; then
	INSTW_TRANSL=0;
fi	
export INSTW_TRANSL

if [ "${INSTW_LOGFILE}_" = "_" ]; then
	INSTW_LOGFILE="${INSTW_ROOTPATH}/logfile"
fi
export INSTW_LOGFILE

if [ "${INSTW_DBGFILE}_" = "_" ]; then
	INSTW_DBGFILE="${INSTW_ROOTPATH}/dbgfile"
fi
export INSTW_DBGFILE

if [ "${INSTW_DBGLVL}_" = "_" ]; then
	INSTW_DBGLVL=0
fi
export INSTW_DBGLVL

[ $INSTW_DBGLVL -gt 0 ] && echo "debug: INSTW_EXCLUD before sort =${INSTW_EXCLUDE}"
INSTW_EXCLUDE="/dev,/proc,/tmp,/var/tmp,${INSTW_EXCLUDE}"
OFS="$IFS"
IFS=','
INSTW_EXCLUDE=$(for name in $INSTW_EXCLUDE; do
	echo $name
	done | sort -u |
	while read elem; do
		echo -n "$elem,"
	done)
export INSTW_EXCLUDE
IFS="$OIFS"

if [ "${INSTW_LOGFILE}_" != "_" ]; then
	  # If INSTW_LOGFILE is a relative path, it must become absolute
	if echo ${INSTW_LOGFILE} | grep -qv '^/' ; then
		INSTW_LOGFILE="$(pwd)/${INSTW_LOGFILE}"
	fi

	export INSTW_LOGFILE
	if cat /dev/null >"${INSTW_LOGFILE}"; then
		true
	else
		echo
		echo "Error : Unable to prepare ${INSTW_LOGFILE}"
		echo
		exit 1
	fi
fi

if [ "${INSTW_DBGFILE}_" != "_" ]; then
	  # If INSTW_DBGFILE is a relative path, it must become absolute
	if echo ${INSTW_DBGFILE} | grep -qv '^/' ; then
		INSTW_DBGFILE="$(pwd)/${INSTW_DBGFILE}"
	fi

	export INSTW_DBGFILE
	if cat /dev/null >"${INSTW_DBGFILE}"; then
		true
	else
		echo
		echo "Error : Unable to prepare ${INSTW_DBGFILE}"
		echo
		exit 1
	fi
fi


#
#
# Options and arguments parsing and validation
#
# ##############################################################################
#

LD_PRELOAD="$LIBDIR/libsentry.so"
export LD_PRELOAD

if [ $INSTW_DBGLVL -gt 0 ]; then 
   echo "debug: INSTW_EXCLUDE=${INSTW_EXCLUDE}"
   echo "debug: INSTW_ROOTPATH=${INSTW_ROOTPATH}"
   echo "debug: INSTW_LOGFILE=${INSTW_LOGFILE}"
   echo "debug: INSTW_DBGFILE=${INSTW_DBGFILE}"
   echo "debug: INSTW_DBGLVL=${INSTW_DBGLVL}"
fi

"$@"

if [ $? -eq 0 ]; then
   FAIL=0
else
   FAIL=1
fi

unset LD_PRELOAD

exit $FAIL