################################################################################
#                                                                              #
#   Copyright (C) 2008-2015 LABBE Corentin <clabbe.montjoie@gmail.com>
#
#    YASAT 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 3 of the License, or
#    (at your option) any later version.
#
#    YASAT 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 YASAT.  If not, see <http://www.gnu.org/licenses/>.
#                                                                              #
################################################################################
#
# This function is originated from Copyright 2007-2009, Michael Boelen (michael@rootkit.nl), The Netherlands
# Web site: http://www.rootkit.nl
#
#################################################################################
#
# Operating System detection
#
#################################################################################
#

#default value
ORWX="/o=rwx"
CORRECT_ORWX="o-rwx"
PERM_GW="/g=w"
PERM_GX="/g=x"
PERM_OW="/o+w"
STAT_RIGHT="--format=%a"
STAT_FULL_RIGHT="--format=%a"
STAT_USER="--format=%U"
STAT_GROUP="--format=%G"
FIND_SETUID="+06000"
SNMPD_CONF_REP="/etc/snmpd/"
ROOTGROUP="root"
BSD_SYSCTL='sysctl'
#OS_TYPE is Linux BSD other
OS_TYPE='unknown'
OS_NICKNAME="unknown"
DEFAULT_APACHE_DOCROOT="/var/www/"

#package names
SNMPD_PACKAGE_NAME='net-snmp'
APACHE_PACKAGE_NAME='apache'
MYSQLD_PACKAGE_NAME='mysql-server'
BIND_PACKAGE_NAME='bind'

    # Check operating system
    case `uname` in

	# IBM AIX
	AIX)
		OS="AIX"
		OS_NAME="AIX"
		OS_TYPE='other'
		OS_FULLNAME=`uname -s -r`
		OS_VERSION=`uname -r`
		CPU=`uname -p`
		HARDWARE=`uname -M`
		FIND_BINARIES="whereis -b"
	;;

	# Mac OS X
	Darwin)
	  OS="MacOS"
	  OS_TYPE='other'
	  if [ -x /usr/bin/sw_vers ]; then
	      OS_NAME=`/usr/bin/sw_vers -productName`
	      OS_VERSION=`/usr/bin/sw_vers -productVersion`
	      OS_FULLNAME="${OS_NAME} ${OS_VERSION}"
	    else
	      # Fall back to pretty safe name
	      OS_NAME="Mac OS X"
	      OS_FULLNAME=`uname -s -r`
	      OS_VERSION=`uname -r`
	  fi
	  HARDWARE=`uname -m`
	  HOMEDIRS="/Users"
	  FIND_BINARIES="whereis"
	  OS_KERNELVERSION=`uname -r`
	;;

	# FreeBSD
        FreeBSD)
	  OS="FreeBSD"
	  OS_TYPE='BSD'
	  OS_NAME="FreeBSD"
          OS_FULLNAME=`uname -s -r`
	  OS_VERSION=`uname -r`
	  HARDWARE=`uname -m`
	  HOMEDIRS="/home /root"
	  FIND_BINARIES="whereis -q -a -b"
	  OS_KERNELVERSION=`uname -i`
	  ORWX="+007"
	  PERM_GW="+020"
	  PERM_GX="+010"
	  PERM_OW='+002'
	  STAT_RIGHT="-f %Lp"
	  STAT_FULL_RIGHT="-f %Mp%Lp"
	  STAT_USER="-f %Su"
	  STAT_GROUP="-f %Sg"
	  ROOTGROUP="wheel"
	  LIST_PKG="pkg_"
	  BSD_SYSCTL='sysctl -e'
        ;;

	# HP-UX
	HP-UX)
	  OS="HP-UX"
	  OS_NAME="HP-UX"
	  OS_TYPE='other'
	  OS_FULLNAME=`uname -s -r`
	  OS_VERSION=`uname -r`
	  HARDWARE=`uname -m`
	  FIND_BINARIES="whereis -b"
	;;

	# Linux
	Linux)
	  OS="Linux"
	  OS_TYPE='Linux'
	  OS_NAME="Linux"
          OS_FULLNAME=""
	  OS_VERSION=`uname -r`
	  LINUX_VERSION=""
	  LINUX_PKG=""
	  HARDWARE=`uname -m`
	  HOMEDIRS="/home"
	  FIND_BINARIES="whereis -b"
	  OS_KERNELVERSION=`uname -r`
	  # Cobalt
	  if [ -e "/etc/cobalt-release" ]; then		OS_FULLNAME=`cat /etc/cobalt-release`; fi
	  # CPUBuilders Linux
	  if [ -e "/etc/cpub-release" ]; then		OS_FULLNAME=`cat /etc/cpub-release`; fi

	if [ -e "/etc/debian_version" -a ! -e /etc/lsb-release ] ;then
		LIST_PKG="apt-get"
		OS_VERSION=`cat /etc/debian_version`
		LINUX_VERSION="Debian"
	  	SNMPD_PACKAGE_NAME='snmpd'
		APACHE_PACKAGE_NAME='apache2'
		BIND_PACKAGE_NAME='bind9'
		#under debian my.cnf is owned by mysql-common
		MYSQLD_PACKAGE_NAME='mysql-common'
		if [ ! -z `echo $OS_VERSION |grep '^5[\.0-9]*'` ] ;then
		  	OS_NICKNAME="Lenny"
		    	OS_FULLNAME="Debian Lenny ${OS_VERSION}"
		fi
		if [ ! -z `echo $OS_VERSION |grep '^4[\.0-9]*'` ] ;then
		    	OS_NICKNAME="Etch"
		    	OS_FULLNAME="Debian Etch ${OS_VERSION}"
		fi
		if [ ! -z `echo $OS_VERSION |grep '^6[\.0-9]*'` ] ;then
		    	OS_NICKNAME="Squeeze"
		    	OS_FULLNAME="Debian Squeeze ${OS_VERSION}"
		fi
		if [ ! -z "`echo $OS_VERSION |grep '^7[\.0-9]*'`" -o ! -z "`echo $OS_VERSION |grep -i wheezy`" ] ;then
		    	OS_NICKNAME="Wheezy"
		    	OS_FULLNAME="Debian Wheezy ${OS_VERSION}"
		fi
		if [ ! -z `echo $OS_VERSION |grep 'jessie'` ];then
			OS_NICKNAME="Jessie"
			OS_FULLNAME="Debian Jessie ${OS_VERSION}"
		fi
	fi

		# Debian/Ubuntu
		if [ -e "/etc/debian_version" -a -e /etc/lsb-release ]; then
			LIST_PKG="apt-get"
		  	OS_VERSION=`cat /etc/debian_version`
		  	SNMPD_PACKAGE_NAME='snmpd'
			APACHE_PACKAGE_NAME='apache2'
			BIND_PACKAGE_NAME='bind9'
			#under debian my.cnf is owned by mysql-common
			MYSQLD_PACKAGE_NAME='mysql-common'
			FIND=`grep "^DISTRIB_ID=" /etc/lsb-release | cut -d '=' -f2`
			if [ "${FIND}" = "Ubuntu" ]; then
				#OS_NAME="Ubuntu"
				OS_VERSION=`grep "^DISTRIB_RELEASE=" /etc/lsb-release | cut -d '=' -f2`
				OS_FULLNAME="Ubuntu ${OS_VERSION}"
				LINUX_VERSION="Ubuntu"
			else
				#OS_NAME="Debian"
				LINUX_VERSION="Debian"
				OS_FULLNAME="Debian ${OS_VERSION}"
				if [ ! -z `echo $OS_VERSION |grep '^5[\.0-9]*' ` ] ;then
					OS_NICKNAME="Lenny"
					OS_FULLNAME="Debian Lenny ${OS_VERSION}"
				fi
				if [ ! -z `echo $OS_VERSION |grep '^4[\.0-9]*' ` ];then
					OS_NICKNAME="Etch"
					OS_FULLNAME="Debian Etch ${OS_VERSION}"
				fi
				if [ ! -z `echo $OS_VERSION |grep 'jessie'` ];then
					OS_NICKNAME="Jessie"
					OS_FULLNAME="Debian Jessie ${OS_VERSION}"
				fi
			fi
		# Ubuntu test (optional) `cat /proc/version | grep "[Uu]buntu"`
		fi
	  # E-smith
	  if [ -e "/etc/e-smith-release" ]; then	OS_FULLNAME=`cat /etc/e-smith-release`; fi
	  # Gentoo
	if [ -e "/etc/gentoo-release" ]; then
	  	OS_FULLNAME=`cat /etc/gentoo-release | awk '{ print $5 }' | cut -d '.' -f1,2`;
		LINUX_VERSION="Gentoo" ;
		LIST_PKG="emerge"
		APACHE_PACKAGE_NAME='apache'
		MYSQLD_PACKAGE_NAME='mysql'
		DEFAULT_APACHE_DOCROOT="/var/www/localhost/htdocs/"
	fi
	  # Red Hat and others
	  # I test /etc/debian_version because installing rpm under debian put the /etc/redhat-release file
	  if [ -e "/etc/redhat-release" -a ! -e "/etc/debian_version" ]; then
		  LIST_PKG="rpm"
		  APACHE_PACKAGE_NAME='httpd'
		# CentOS
	  	FIND=`grep "CentOS" /etc/redhat-release`
		if [ ! "${FIND}" = "" ]; then
#			OS_NAME="CentOS"
			OS_FULLNAME=`cat /etc/redhat-release | grep "CentOS"`
			LINUX_VERSION="CentOS"
			OS_VERSION="${OS_FULLNAME}"
		fi
		# Fedora
	  	FIND=`grep "Fedora" /etc/redhat-release`
		if [ ! "${FIND}" = "" ]; then
#			OS_NAME="Fedora"
			OS_FULLNAME=`cat /etc/redhat-release | grep "Fedora"`
			OS_VERSION="${OS_FULLNAME}"
			LINUX_VERSION="Fedora"
		fi
		# Oracle Enterprise Linux
	  	FIND=`grep "Enterprise Linux Enterprise Linux Server" /etc/redhat-release`
		if [ ! "${FIND}" = "" ]; then		OS_NAME="Oracle Enterprise Linux";	OS_FULLNAME=`cat /etc/redhat-release | grep "Enterprise Linux"`;	OS_VERSION="${OS_FULLNAME}"; fi

		# Red Hat
	  	FIND=`grep "Red Hat" /etc/redhat-release`
		if [ ! "${FIND}" = "" ]; then
#			OS_NAME="Red Hat"
			OS_FULLNAME=`cat /etc/redhat-release | grep "Red Hat"`
			OS_VERSION="${OS_FULLNAME}"
			LINUX_VERSION="Red Hat"
		fi
	  fi
	  if [ -e "/etc/SLOX-release" ]; then		OS_FULLNAME=`cat /etc/SLOX-release | grep "SuSE Linux"`; fi

	  # Slackware
	  if [ -e "/etc/slackware-version" ]; then	OS_FULLNAME=`cat /etc/slackware-version`;		LINUX_VERSION="Slackware"; fi

	  # SuSE
	  if [ -e "/etc/SuSE-release" ]; then		OS_VERSION=`cat /etc/SuSE-release | head -n 1`; 	LINUX_VERSION="SuSE"; fi

	  # Turbo Linux
	  if [ -e "/etc/turbolinux-release" ]; then	OS_FULLNAME=`cat /etc/turbolinux-release`; fi
	  # YellowDog
	  if [ -e "/etc/yellowdog-release" ]; then	OS_FULLNAME=`cat /etc/yellowdog-release`; fi

		if [ -e "/etc/arch-release" ] ;then
			#/etc/arch-release is empty
			LINUX_VERSION="arch"
			OS_FULLNAME="ArchLinux"
			LIST_PKG="pacman"
		fi
		if [ -e "/etc/openwrt_release" ];then
			LINUX_VERSION='openwrt'
			OS_FULLNAME=`grep DISTRIB_DESCRIPTION /etc/openwrt_release | cut -d\= -f2 | cut -d\" -f2`
			OS_VERSION=`grep DISTRIB_RELEASE /etc/openwrt_release | cut -d\= -f2 | cut -d\" -f2`
			OS_NICKNAME=`grep DISTRIB_CODENAME /etc/openwrt_release | cut -d\= -f2 | cut -d\" -f2`
		fi

	  # If Linux version is unknown, use uname value
	  if [ "${OS_FULLNAME}" = "" ]; then OS_FULLNAME=`uname -s -r`; fi

	;;

	# NetBSD
	NetBSD)
	  OS="NetBSD"
	  OS_TYPE='BSD'
	  OS_NAME="NetBSD"
	  OS_FULLNAME=`uname -s -r`
	  OS_KERNELVERSION=`uname -v`
	  OS_VERSION=`uname -r`
	  HARDWARE=`uname -m`
	  FIND_BINARIES="whereis"
	    LIST_PKG="pkg_"
	;;

	# OpenBSD
	OpenBSD)
	  OS="OpenBSD"
	  OS_TYPE='BSD'
	  OS_NAME="OpenBSD"
	  OS_FULLNAME=`uname -s -r`
	  OS_KERNELVERSION=`uname -v`
	  OS_VERSION=`uname -r`
	  HARDWARE=`uname -m`
	  FIND_BINARIES="whereis"
	    LIST_PKG="pkg_"
	  ORWX="-007"
	  PERM_GW="-020"
	  PERM_GX="-010"
	  PERM_OW='-002'
	  STAT_RIGHT="-f %Lp"
	  STAT_FULL_RIGHT="-f %Mp%Lp"
	  STAT_USER="-f %Su"
	  STAT_GROUP="-f %Sg"
	  ROOTGROUP="wheel"
	  FIND_SETUID="-06000"

	;;

	# Solaris / OpenSolaris
	SunOS)
	  OS="Solaris"
	  OS_TYPE='other'
	  OS_NAME="Sun Solaris"
	  OS_FULLNAME=`uname -s -r`
	  OS_VERSION=`uname -r`
	  HARDWARE=`uname -m`
	  if [ -x /usr/bin/isainfo ]; then
	      # Returns 32, 64
	      OS_MODE=`/usr/bin/isainfo -b`
	  fi
	;;

	# Unknown or unsupported systems
        *)
	  echo "[ ${WARNING}WARNING${NORMAL} ]"
          echo "${WARNING}Error${NORMAL}: ${WHITE}Unknown OS found. No support available for this OS or platform...${NORMAL}"
          exit 1
        ;;

    esac

# Testing for old find version (4.1.20)
# BSD do not have --version
if [ "$OS_TYPE" = 'Linux' ] ;then
	if [ "$LINUX_VERSION" = 'openwrt' ];then
		#find is busybox
		Display --indent 2 --text "find is Busybox" --result INFO --color BLUE
		ORWX="+007"
		PERM_GW="-020"
		PERM_GX="-010"
		PERM_OW='-002'
	else
		if [ ! -z "`find --version | grep ' 4.1.20'`" ];then
			Display --indent 2 --text "Old find detected" --result WARNING --color BLUE
			ORWX='+o=rwx'
		fi
	fi
fi

Debug "OS_TYPE=$OS_TYPE"
Debug "OS_NAME=$OS_NAME"
Debug "OS_FULLNAME=$OS_FULLNAME"
Debug "OS_KERNELVERSION=$OS_KERNELVERSION"
Debug "OS_VERSION=$OS_VERSION"
Debug "OS_NICKNAME=$OS_NICKNAME"
Debug "HARDWARE=$HARDWARE"
Debug "LINUX_VERSION=$LINUX_VERSION"

#detect hardware
# generic name x86 x86_64 arm
HARDWARE_GEN=`uname -m`
if [ "$HARDWARE_GEN" = 'i686' -o "$HARDWARE_GEN" = 'i486' -o "$HARDWARE_GEN" = 'i586' ];then
	HARDWARE_GEN=x86
fi
if [ "$HARDWARE_GEN" = 'amd64' ];then
	HARDWARE_GEN=x86_64
fi
if [ "$HARDWARE_GEN" = 'armv7l' ];then
	HARDWARE_GEN=arm
fi
if [ "$HARDWARE_GEN" = 'armv7j' ];then
	HARDWARE_GEN=arm
fi