Re: Bug#461442: please add support for os-prober to detect other OSes in update-grub

[Fabian Greffrath <greffrath@leat.rub.de>]

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Robert Millan schrieb:
> You could try with qemu.
Update:
I tried with Knoppix on a computer that has Debian sid and Windows XP 
installed. The attached script did it's job well - of course except for 
the part when it has to convert Linux device names to GRUB drives (see 
#462218). Support for HURD is still outstanding, though.

Cheers,
Fabian

-- 
Dipl.-Phys. Fabian Greffrath

Ruhr-Universität Bochum
Lehrstuhl für Energieanlagen und Energieprozesstechnik (LEAT)
Universitätsstr. 150, IB 3/134
D-44780 Bochum

Telefon: +49 (0)234 / 32-26334
Fax:     +49 (0)234 / 32-14227
E-Mail:  greffrath@leat.ruhr-uni-bochum.de


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#! /bin/sh -e

# update-grub helper script.
# <insert copyright and license blurb here>

convert_device_to_grub_drive () {
  # you know what's missing here...
  echo $1
}

if [ -x "`which os-prober 2>/dev/null`" ] ; then
  OSPROBED="`os-prober | tr ' ' '|' | paste -s -d ' '`"
fi

if [ -n "${OSPROBED}" ] ; then
  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)
        CHAINROOT="`convert_device_to_grub_drive ${DEVICE}`"

        cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" {
	set root=${CHAINROOT}
	chainloader +1
}
EOF
      ;;
      linux)
        if [ -x "`which linux-boot-prober 2>/dev/null`" ] ; then
          LINUXPROBED="`linux-boot-prober ${DEVICE} | tr ' ' '|' | paste -s -d ' '`"
        fi

        if [ -n "${LINUXPROBED}" ] ; then
          for LINUX in ${LINUXPROBED} ; do
            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 '|' ' '`"

            LINUXROOT="`convert_device_to_grub_drive ${LBOOT}`"

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

            cat << EOF
menuentry "${LLABEL} (on ${DEVICE})" {
	set root=${LINUXROOT}
	linux ${LKERNEL} ${LPARAMS}
EOF
            if [ -n "${LINITRD}" ] ; then
              cat << EOF
	initrd ${LINITRD}
EOF
            fi
            cat << EOF
}
EOF
          done
        fi
      ;;
      hurd)
        # not yet...
      ;;
      *)
      ;;
    esac
  done
fi