Seems that currently grub-installer does not try to add other
installed operating systems to the generated boot menu.
As a temporary measure (until proper installed OS detection is implemented),
the following script may be added. It checks if there is /dev/hda1 that is
not of "Linux" or "Linux swap" type, and if yes, and adds a chainloader option
to gererated /boot/grub/menu.lts in the case.
It seems to be not too bad approach: most users not experienced enough
to modify bootloader configuration after installation have alternate OS
installed on the first partition of the first drive.
if [ -f /target/boot/grub/menu.lst ]; then
line=`(echo p; echo q) | chroot /target fdisk /dev/hda 2>&1 | grep /dev/hda1`
if [ -n "$line" ]; then
if echo $line | grep Linux >/dev/null; then true; else
# Seems that first partition on first IDE drive exists,
# and is not Linux and not Linux Swap. So add it to boot menu.
sed 's/^timeout.*/timeout 15/' < /target/boot/grub/menu.lst >
/target/boot/grub/menu.lst.new
cat >> /target/boot/grub/menu.lst.new << END
title Old OS at (hd0,0)
root (hd0,0)
makeactive
chainloader +1
END
mv /target/boot/grub/menu.lst.new /target/boot/grub/menu.lst
fi
fi
fi
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