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#!/bin/sh
set -u
main()
{
local boot=
[ "x$(id -u)" = 'x0' ] || error 'Must be run as the superuser'
if [ ${#} -eq 0 ]; then
if is_chroot; then
error 'Running under chroot; %s' \
'please specify the boot and root devices'
fi
boot="$(mountpoint -n /boot | cut -d ' ' -f 1)"
root="$(mountpoint -n / | cut -d ' ' -f 1)"
elif [ ${#} -eq 2 ]; then
boot="${1}"
root="${2}"
else
usage >&2
exit 1
fi
[ -e "${boot}" ] || error 'Boot device not found'
[ -e /etc/lilo.conf.in ] || \
error '/etc/lilo.conf: No such file or directory'
[ -e /etc/lilo.conf ] && error '/etc/lilo.conf exists'
sed "s|@BOOT@|${boot}|g; s|@ROOT@|${root}|g;" /etc/lilo.conf.in \
>/etc/lilo.conf
/sbin/lilo
rm /etc/lilo.conf
}
usage()
{
printf 'Usage: install-lilo [<boot> <root>]\n'
}
error()
{
local fmt="${1}"
shift 1
printf "install-lilo: Error: ${fmt}\n" "${@}" >&2
exit 2
}
is_chroot()
{
awk '$5 == "/" { exit(1); };' "/proc/${$}/mountinfo"
}
main "${@}"
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