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#!/bin/bash
set -e

#grubSyntax
#version 1.1.0
#autoconfigurador de items de menu para grub/brg
#basado en scripts del paquete de grub
#Antonio Doblas Viso
#Universidad de Málaga

DISK=
PART=



if [ $# == 3 ]; then
	DISK=$1;PART=$2;KERNELPARAM=$3
fi

if [ $# == 2 ]; then
	DISK=$1;PART=$2
fi

if [ $# == 1 ]; then
	KERNELPARAM=$1
fi


#Versión de scripts compatible con la versión 1.99 de grub-probe
#Uso del grub-probe 1.99  según arquitectura
grub_probe=${grub_probe:-$OGBIN/grub-probe1.99_$(arch)}

#librerias del osProber para kernel antiguos: detecta e identifica sistema operativos.
grub-install --version | grep 1.99 && cp -r /opt/opengnsys/lib/os-probes/* /usr/lib/os-probes/


#Autoreconocimiento del ogLive en cache
#fichero de reconocimeinto de grub
#fichero de lsb-release en la cache (al final de este scripts se elimina esta entrada para que el browser no lo muestre

if [ $(ls /opt/opengnsys/cache/boot/$oglivedir/ogvmlinuz 2>/dev/null) ]; then
	sed -i 's|/boot/\${oglivedir}/ogvmlinuz |/vmlinuz |i' /usr/lib/linux-boot-probes/mounted/90fallback
	sed -i 's|/vmlinuz |/vmlinuz /boot/\${oglivedir}/ogvmlinuz |1' /usr/lib/linux-boot-probes/mounted/90fallback
	mkdir -p /opt/opengnsys/cache/etc/
	echo "DISTRIB_ID=Ubuntu" > /opt/opengnsys/cache/etc/lsb-release
	echo "DISTRIB_RELEASE= " >> /opt/opengnsys/cache/etc/lsb-release
	echo $oglivedir | awk -F- ' {print "DISTRIB_CODENAME="$2 }' >> /opt/opengnsys/cache/etc/lsb-release
	echo "DISTRIB_DESCRIPTION=OpenGnsys Live" >> /opt/opengnsys/cache/etc/lsb-release
fi

#ver linea 195 detección de los os en variable OSPROBED

OG_prepare_grub_to_access_device ()
{
  device="$1"
  loop_file=
  case ${device} in
    /dev/loop/*|/dev/loop[0-9])
      grub_loop_device="${device#/dev/}"
      loop_file=`losetup "${device}" | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
      case $loop_file in
        /dev/*) ;;
        *)
          loop_device="${device}"
          device=`"${grub_probe}" --target=device "${loop_file}"` || return 0
        ;;
      esac
    ;;
  esac
  if dmsetup status $device 2>/dev/null | grep -q 'crypt[[:space:]]$'; then
    grub_warn \
      "$device is a crypto device, which GRUB cannot read directly.  Some" \
      "necessary modules may be missing from /boot/grub/grub.cfg.  You may" \
      "need to list them in GRUB_PRELOAD_MODULES in /etc/default/grub.  See" \
      "http://bugs.debian.org/542165 for details."
    return 0
  fi
  # Abstraction modules aren't auto-loaded.
  abstraction="`"${grub_probe}" --device "${device}" --target=abstraction`"
  for module in ${abstraction} ; do
    echo "insmod ${module}"
  done
  partmap="`"${grub_probe}" --device "${device}" --target=partmap`"
  for module in ${partmap} ; do
    case "${module}" in
      netbsd | openbsd)
        echo "insmod part_bsd";;
      *)
        echo "insmod part_${module}";;
    esac
  done
  fs="`"${grub_probe}" --device "${device}" --target=fs`"
  for module in ${fs} ; do
    echo "insmod ${module}"
  done
  # If there's a filesystem UUID that GRUB is capable of identifying, use it;
  # otherwise set root as per value in device.map. 
  #OG modificacion
  echo "set root='`"${grub_probe}" --device "${device}" --target=drive`'"
  #if fs_uuid="`"${grub_probe}" --device "${device}" --target=fs_uuid 2> /dev/null`" ; then
  #  echo "search --no-floppy --fs-uuid --set=root ${fs_uuid}"
  #fi

  if [ "x${loop_file}" != x ]; then
    loop_mountpoint="$(awk '"'${loop_file}'" ~ "^"$2 && $2 != "/" { print $2 }' /proc/mounts | tail -n1)"
    if [ "x${loop_mountpoint}" != x ]; then
      echo "loopback ${grub_loop_device} ${loop_file#$loop_mountpoint}"
      echo "set root=(${grub_loop_device})"
    fi
  fi
}





# grub-mkconfig helper script.
# Copyright (C) 2006,2007,2008,2009  Free Software Foundation, Inc.
#
# GRUB 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.
#
# GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.


prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib

. ${libdir}/grub/grub-mkconfig_lib

found_other_os=

make_timeout () {
  if [ "x${found_other_os}" = "x" ] ; then
    if [ "x${1}" != "x" ] ; then
      if [ "x${GRUB_HIDDEN_TIMEOUT_QUIET}" = "xtrue" ] ; then
	verbose=
      else
	verbose=" --verbose"
      fi

      if [ "x${1}" = "x0" ] ; then
	cat <<EOF
if [ "x\${timeout}" != "x-1" ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep$verbose --interruptible 3 ; then
      set timeout=0
    fi
  fi
fi
EOF
      else
	cat << EOF
if [ "x\${timeout}" != "x-1" ]; then
  if sleep$verbose --interruptible ${GRUB_HIDDEN_TIMEOUT} ; then
    set timeout=0
  fi
fi
EOF
      fi
    fi
  fi
}

adjust_timeout () {
  if [ "x$GRUB_BUTTON_CMOS_ADDRESS" != "x" ]; then
    cat <<EOF
if cmostest $GRUB_BUTTON_CMOS_ADDRESS ; then
EOF
    make_timeout "${GRUB_HIDDEN_TIMEOUT_BUTTON}" "${GRUB_TIMEOUT_BUTTON}"
    echo else
    make_timeout "${GRUB_HIDDEN_TIMEOUT}" "${GRUB_TIMEOUT}"
    echo fi
  else
    make_timeout "${GRUB_HIDDEN_TIMEOUT}" "${GRUB_TIMEOUT}"
  fi
}

if [ "x${GRUB_DISABLE_OS_PROBER}" = "xtrue" ]; then
  adjust_timeout
  exit 0
fi

if [ -z "`which os-prober 2> /dev/null`" -o -z "`which linux-boot-prober 2> /dev/null`" ] ; then
  # missing os-prober and/or linux-boot-prober
  adjust_timeout
  exit 0
fi

case "$1" in


esac



# ADV  OSPROBED
if [ -n "${DISK}" ]; then
	#Si $DISK esta definido buscar en el disco y la particion parametro 1 y 2 
	OSSEARCH=$(ogDiskToDev $DISK $PART)
	OSPROBED="`os-prober | grep $OSSEARCH | tr ' ' '^' | paste -s -d ' '`"
else
	#si no esta definido
	OSPROBED="`os-prober | tr ' ' '^' | paste -s -d ' '`"
fi

#DISK=${DISK:-"1"}
#echo $OSSEARCH 
#echo "$OSPROBED"


if [ -z "${OSPROBED}" ] ; then
  # empty os-prober output, nothing doing
  adjust_timeout
  exit 0
fi

osx_entry() {
	found_other_os=1
        cat << EOF
menuentry "${LONGNAME} (${2}-bit) (on ${DEVICE})" --class osx --class darwin --class os {
EOF
	save_default_entry | sed -e "s/^/\t/"
	prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"
	cat << EOF
        load_video
        set do_resume=0
        if [ /var/vm/sleepimage -nt10 / ]; then
           if xnu_resume /var/vm/sleepimage; then
             set do_resume=1
           fi
        fi
        if [ \$do_resume = 0 ]; then
           xnu_uuid ${OSXUUID} uuid
           if [ -f /Extra/DSDT.aml ]; then
              acpi -e /Extra/DSDT.aml
           fi
           $1 /mach_kernel boot-uuid=\${uuid} rd=*uuid
           if [ /System/Library/Extensions.mkext -nt /System/Library/Extensions ]; then
              xnu_mkext /System/Library/Extensions.mkext
           else
              xnu_kextdir /System/Library/Extensions
           fi
           if [ -f /Extra/Extensions.mkext ]; then
              xnu_mkext /Extra/Extensions.mkext
           fi
           if [ -d /Extra/Extensions ]; then
              xnu_kextdir /Extra/Extensions
           fi
           if [ -f /Extra/devprop.bin ]; then
              xnu_devprop_load /Extra/devprop.bin
           fi
           if [ -f /Extra/splash.jpg ]; then
              insmod jpeg
              xnu_splash /Extra/splash.jpg
           fi
           if [ -f /Extra/splash.png ]; then
              insmod png
              xnu_splash /Extra/splash.png
           fi
           if [ -f /Extra/splash.tga ]; then
              insmod tga
              xnu_splash /Extra/splash.tga
           fi
        fi
}
EOF
}

wubi=

for OS in ${OSPROBED} ; do
  DEVICE="`echo ${OS} | cut -d ':' -f 1`"
  LONGNAME="`echo ${OS} | cut -d ':' -f 2 | tr '^' ' '`"
  LABEL="`echo ${OS} | cut -d ':' -f 3 | tr '^' ' '`"
  BOOT="`echo ${OS} | cut -d ':' -f 4`"

  if [ -z "${LONGNAME}" ] ; then
    LONGNAME="${LABEL}"
  fi

  echo "Found ${LONGNAME} on ${DEVICE}" >&2

  case ${BOOT} in
    chain)

      case ${LONGNAME} in
	Windows*)
	  if [ -z "$wubi" ]; then
	    if [ -x /usr/share/lupin-support/grub-mkimage ] && \
	       /usr/share/lupin-support/grub-mkimage --test; then
	      wubi=yes
	    else
	      wubi=no
	    fi
	  fi
	  if [ "$wubi" = yes ]; then
	    echo "Skipping ${LONGNAME} on Wubi system" >&2
	    continue
	  fi
	  ;;
      esac
      #adv
      LABELCLASS=$(echo "${LONGNAME}" | awk '{print tolower($1$2);}')

      found_other_os=1
      cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" --class $LABELCLASS --class windows {
EOF
      save_default_entry | sed -e "s/^/\t/"
#ADV      prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"
      OG_prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"

      case ${LONGNAME} in
	Windows\ Vista*|Windows\ 7*|Windows\ Server\ 2008*)
	;;
	*)
#ADV	  cat << EOF
#ADV	drivemap -s (hd0) \${root}
#ADV EOF
	;;
      esac

      cat <<EOF
	chainloader +1
}
EOF
    ;;
    linux)
	KERNELPARAM=""
	#linuxprobed detecta todos los  kernels de una partición.
      LINUXPROBED="`linux-boot-prober ${DEVICE} 2> /dev/null | tr ' ' '^' | paste -s -d ' '`"
#esta opcion de linuxprobe solo interpreta el primer kernel detectado de la partición 
#Si queremos que autoincluya todos los kernels hay que comentar esta filtrado de LINUXPROBED
      LINUXPROBED=$(echo $LINUXPROBED | awk '{ print $1}') 	
      prepare_boot_cache=
       #	echo "ADV listado de los kerenel encontrados linux-boot-prober ${DEVICE} $LINUXPROBED"
      for LINUX in ${LINUXPROBED} ; do
	LINUX=$LINUXPROBED
        LROOT="`echo ${LINUX} | cut -d ':' -f 1`"
        LBOOT="`echo ${LINUX} | cut -d ':' -f 2`"
        LLABEL="`echo ${LINUX} | cut -d ':' -f 3 | tr '^' ' '`"
        LKERNEL="`echo ${LINUX} | cut -d ':' -f 4`"
        LINITRD="`echo ${LINUX} | cut -d ':' -f 5`"
        LPARAMS="`echo ${LINUX} | cut -d ':' -f 6- | tr '^' ' '`"
        if [ -z "${LLABEL}" ] ; then
          LLABEL="${LONGNAME}"
        fi

	if [ "${LROOT}" != "${LBOOT}" ]; then
	  LKERNEL="${LKERNEL#/boot}"
	  LINITRD="${LINITRD#/boot}"
	fi

	found_other_os=1
      	LABELCLASS=$(echo "${LLABEL}" | awk '{print tolower($1);}')
        cat << EOF
menuentry "${LLABEL} (on ${DEVICE})" --class $LABELCLASS --class linux --class os {
EOF
	save_default_entry | sed -e "s/^/\t/"
	if [ -z "${prepare_boot_cache}" ]; then
#ADV	    prepare_boot_cache="$(prepare_grub_to_access_device ${LBOOT} | sed -e "s/^/\t/")"
	    prepare_boot_cache="$(OG_prepare_grub_to_access_device ${LBOOT} | sed -e "s/^/\t/")"
	fi
	printf '%s\n' "${prepare_boot_cache}"
	if [ "$LABELCLASS" == "opengnsys" ]; then
		KERNELPARAM=$(cat /proc/cmdline)
	fi
	cat <<  EOF
	linux ${LKERNEL} ${LPARAMS} ${KERNELPARAM} 
EOF
        if [ -n "${LINITRD}" ] ; then
          cat << EOF
	initrd ${LINITRD}
EOF
        fi
        cat << EOF
}
EOF
     done
    ;;
    macosx)
      OSXUUID="`grub-probe --target=fs_uuid --device ${DEVICE} 2> /dev/null`"
      osx_entry xnu_kernel 32
      osx_entry xnu_kernel64 64
    ;;
    hurd)
      found_other_os=1
      cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" --class hurd --class gnu --class os {
EOF
      save_default_entry | sed -e "s/^/\t/"
      prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"
      grub_device="`${grub_probe} --device ${DEVICE} --target=drive`"
      mach_device="`echo "${grub_device}" | sed -e 's/(\(hd.*\),msdos\(.*\))/\1s\2/'`"
      grub_fs="`${grub_probe} --device ${DEVICE} --target=fs`"
      case "${grub_fs}" in
	*fs)	hurd_fs="${grub_fs}" ;;
	*)	hurd_fs="${grub_fs}fs" ;;
      esac
      cat << EOF
	multiboot /boot/gnumach.gz root=device:${mach_device}
	module /hurd/${hurd_fs}.static ${hurd_fs} --readonly \\
			--multiboot-command-line='\${kernel-command-line}' \\
			--host-priv-port='\${host-port}' \\
			--device-master-port='\${device-port}' \\
			--exec-server-task='\${exec-task}' -T typed '\${root}' \\
			'\$(task-create)' '\$(task-resume)'
	module /lib/ld.so.1 exec /hurd/exec '\$(exec-task=task-create)'
}
EOF
    ;;
    *)
      echo "  ${LONGNAME} is not yet supported by grub-mkconfig." >&2
    ;;
  esac
done

adjust_timeout

rm /opt/opengnsys/cache/etc/lsb-release &>/dev/null