/etc/grub.d/42_otherlinux

#!/bin/bash

_linux_list="fedora ubuntu slack arch"

for _linux_key in $_linux_list; do
    # Figure out the boot partition index.
    _linux_boot_uuid=`grep $_linux_key\/boot /etc/fstab | awk '{print $1}' | sed 's/^UUID=//g'`

    # Figure out the kernel path.
    _linux_kern=`ls -t /mnt/$_linux_key/boot/vmlinu* | head -1`
    _linux_kern=`basename "$_linux_kern"`
    if [ -z "$_linux_kern" ]; then
        continue
    fi

    # Figure out the initramfs path.
    _linux_initr=`ls -t /mnt/$_linux_key/boot/initr* | grep -v fall | head -1`
    _linux_initr=`basename "$_linux_initr"`
    if [ -z "$_linux_initr" ]; then
        continue
    fi

    # Get an optional kernel command line from a text file in /etc/cmdline.
    _linux_cmdline=""
    if [ -f /etc/cmdline/$_linux_key ]; then
        _linux_cmdline="`cat /etc/cmdline/$_linux_key`"
    fi

    # Some display names are different.
    case $_linux_key in
    slack)
        _linux_display=slackware
        ;;

    *)
        _linux_display=$_linux_key
        ;;
    esac

    # Create the entry.
    cat << EOF
menuentry '${_linux_display^}' {
insmod part_msdos
insmod ext2
search --no-floppy --fs-uuid --set=root $_linux_boot_uuid
linux /$_linux_kern root=/dev/mapper/vg-root$_linux_key ro quiet splash $_linux_cmdline
initrd /$_linux_initr
}
EOF
done