/usr/sbin/extlinux-update is in extlinux 2:4.05+dfsg-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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set -e
_EXTLINUX_DIRECTORY="/boot/extlinux"
Update ()
{
# Upate target file using source content
_TARGET="${1}"
_SOURCE="${2}"
_TMPFILE="${_TARGET}.tmp"
rm -f "${_TMPFILE}"
echo "${_SOURCE}" > "${_TMPFILE}"
if [ -e "${_TARGET}" ] && cmp -s "${_TARGET}" "${_TMPFILE}"
then
rm -f "${_TMPFILE}"
else
# FIXME: should use fsync here
echo "P: Updating ${_TARGET}..."
mv -f "${_TMPFILE}" "${_TARGET}"
fi
}
# User is unprivileged
if [ "$(id -u)" -ne 0 ]
then
echo "E: need root privileges"
exit 1
fi
# Redirect stdout to stderr due Debconf usage
exec 1>&2
# Reading the default file
if [ -e /etc/default/extlinux ]
then
. /etc/default/extlinux
fi
EXTLINUX_UPDATE="${EXTLINUX_UPDATE:-true}"
if [ "${EXTLINUX_UPDATE}" != "true" ]
then
echo "P: extlinux-update is disabled in /etc/default/extlinux."
exit 0
fi
# Checking extlinux directory
echo -n "P: Checking for EXTLINUX directory..."
# Creating extlinux directory
if [ ! -e "${_EXTLINUX_DIRECTORY}" ]
then
echo " not found."
echo -n "P: Creating EXTLINUX directory..."
mkdir -p "${_EXTLINUX_DIRECTORY}"
echo " done: ${_EXTLINUX_DIRECTORY}"
else
echo " found."
fi
# Setting defaults
EXTLINUX_ALTERNATIVES="${EXTLINUX_ALTERNATIVES:-default recovery}"
EXTLINUX_DEFAULT="${EXTLINUX_DEFAULT:-l0}"
EXTLINUX_ENTRIES="${EXTLINUX_ENTRIES:-all}"
EXTLINUX_MEMDISK="${EXTLINUX_MEMDISK:-true}"
EXTLINUX_MEMDISK_DIRECTORY="${EXTLINXU_MEMDISK_DIRECTORY:-/boot}"
if [ -z "${EXTLINUX_MENU_LABEL}" ]
then
if [ -x "$(which lsb_release 2>/dev/null)" ]
then
EXTLINUX_MENU_LABEL="$(lsb_release -i -s) GNU/Linux, kernel"
else
EXTLINUX_MENU_LABEL="Debian GNU/Linux, kernel"
fi
fi
EXTLINUX_OS_PROBER="${EXTLINUX_OS_PROBER:-true}"
EXTLINUX_PARAMETERS="${EXTLINUX_PARAMETERS:-ro quiet}"
if [ -z "${EXTLINUX_ROOT}" ]
then
# Find root partition
while read _LINE
do
read _FS_SPEC _FS_FILE _FS_VFSTYPE _FS_MNTOPS _FS_FREQ _FS_PASSNO << EOF
${_LINE}
EOF
if [ "${_FS_SPEC}" != "#" ] && [ "${_FS_FILE}" = "/" ]
then
EXTLINUX_ROOT="root=${_FS_SPEC}"
break
fi
done < /etc/fstab
fi
if [ -z "${EXTLINUX_THEME}" ]
then
# Using default menu if available
if [ -e /usr/share/syslinux/themes/debian/extlinux ]
then
EXTLINUX_THEME="debian"
else
EXTLINUX_THEME="none"
fi
fi
EXTLINUX_TIMEOUT="${EXTLINUX_TIMEOUT:-50}"
# Writing new default file
cat > "/etc/default/extlinux" << EOF
## /etc/default/extlinux - configuration file for extlinux-update(8)
EXTLINUX_UPDATE="${EXTLINUX_UPDATE}"
EXTLINUX_ALTERNATIVES="${EXTLINUX_ALTERNATIVES}"
EXTLINUX_DEFAULT="${EXTLINUX_DEFAULT}"
EXTLINUX_ENTRIES="${EXTLINUX_ENTRIES}"
EXTLINUX_MEMDISK="${EXTLINUX_MEMDISK}"
EXTLINUX_MEMDISK_DIRECTORY="${EXTLINUX_MEMDISK_DIRECTORY}"
EXTLINUX_MENU_LABEL="${EXTLINUX_MENU_LABEL}"
EXTLINUX_OS_PROBER="${EXTLINUX_OS_PROBER}"
EXTLINUX_PARAMETERS="${EXTLINUX_PARAMETERS}"
EXTLINUX_ROOT="${EXTLINUX_ROOT}"
EXTLINUX_THEME="${EXTLINUX_THEME}"
EXTLINUX_TIMEOUT="${EXTLINUX_TIMEOUT}"
EOF
# Create linux.cfg
_CONFIG="\
## ${_EXTLINUX_DIRECTORY}/linux.cfg
##
## IMPORTANT WARNING
##
## The configuration of this file is generated automatically.
## Do not edit this file manually, use: extlinux-update
"
# Find linux versions
_VERSIONS="$(cd /boot && ls vmlinuz-* | grep -v .dpkg-tmp | sed -e 's|vmlinuz-||g' | sort -nr)"
if [ "$(stat --printf %d /)" = "$(stat --printf %d /boot)" ]
then
# / and /boot are on the same filesystem
_BOOT_DIRECTORY="/boot"
else
# / and /boot are not on the same filesystem
_BOOT_DIRECTORY=""
fi
for _VERSION in ${_VERSIONS}
do
echo "P: Writing config for /boot/vmlinuz-${_VERSION}..."
_NUMBER="${_NUMBER:-0}"
_ENTRY="${_ENTRY:-1}"
if [ -e /boot/initrd.img-${_VERSION} ]
then
_INITRD="initrd=${_BOOT_DIRECTORY}/initrd.img-${_VERSION}"
else
_INITRD=""
fi
if echo ${EXTLINUX_ALTERNATIVES} | grep -q default
then
# Writing default entry
_CONFIG="${_CONFIG}
label l${_NUMBER}
menu label ${EXTLINUX_MENU_LABEL} ${_VERSION}
linux ${_BOOT_DIRECTORY}/vmlinuz-${_VERSION}
append ${_INITRD} ${EXTLINUX_ROOT} ${EXTLINUX_PARAMETERS}"
fi
if echo ${EXTLINUX_ALTERNATIVES} | grep -q live
then
# Writing live entry
_CONFIG="${_CONFIG}
label l${_NUMBER}l
menu label ${EXTLINUX_MENU_LABEL} ${_VERSION} (live mode)
linux ${_BOOT_DIRECTORY}/vmlinuz-${_VERSION}
append ${_INITRD} ${EXTLINUX_ROOT} ${EXTLINUX_PARAMETERS} boot=live plainroot
text help
This option boots the system into live mode (non-persistent)
endtext"
fi
if echo ${EXTLINUX_ALTERNATIVES} | grep -q recovery
then
# Writing recovery entry
_CONFIG="${_CONFIG}
label l${_NUMBER}r
menu label ${EXTLINUX_MENU_LABEL} ${_VERSION} (recovery mode)
linux ${_BOOT_DIRECTORY}/vmlinuz-${_VERSION}
append ${_INITRD} ${EXTLINUX_ROOT} $(echo ${EXTLINUX_PARAMETERS} | sed -e 's| quiet||') single
text help
This option boots the system into recovery mode (single-user)
endtext"
fi
_NUMBER="$((${_NUMBER} + 1))"
if [ "${EXTLINUX_ENTRIES}" = "${_ENTRY}" ]
then
break
fi
done
_NUMBER=""
Update "${_EXTLINUX_DIRECTORY}/linux.cfg" "${_CONFIG}"
if [ "${EXTLINUX_MEMDISK}" = "true" ]
then
if [ ! -e /usr/lib/extlinux/memdisk ]
then
echo "E: /usr/lib/extlinux/memdisk: No such file"
exit 1
fi
cp -f /usr/lib/extlinux/memdisk "${_EXTLINUX_DIRECTORY}"
# Create memdisk.cfg
_CONFIG="\
## ${_EXTLINUX_DIRECTORY}/memdisk.cfg
##
## IMPORTANT WARNING
##
## The configuration of this file is generated automatically.
## Do not edit this file manually, use: extlinux-update
"
for _IMAGE in "${EXTLINUX_MEMDISK_DIRECTORY}"/*.iso "${EXTLINUX_MEMDISK_DIRECTORY}"/*.img
do
# Skip non-existing files and files matching '^initrd.*'
if [ ! -e "${_IMAGE}" ] || [ "$(basename ${_IMAGE} | cut -b 1-6)" = "initrd" ]
then
continue
fi
_NUMBER="${_NUMBER:-0}"
echo "P: Writing config for ${_IMAGE}..."
case "${_IMAGE}" in
*.iso)
_IMAGE_APPEND="iso"
;;
*.img)
_IMAGE_APPEND="raw"
;;
esac
if [ -n "${_BOOT_DIRECTORY}" ]
then
# / and /boot are on the same filesystem
_MEMDISK_DIRECTORY="${_EXTLINUX_DIRECTORY}"
else
# / and /boot are not on the same filesystem
_MEMDISK_DIRECTORY="$(echo ${_EXTLINUX_DIRECTORY} | sed -e 's|^/boot||')"
_IMAGE="$(echo ${_IMAGE} | sed -e 's|^/boot||')"
fi
# Writing image entry
_CONFIG="${_CONFIG}
label m${_NUMBER}
menu label Memdisk, image $(basename ${_IMAGE})
linux ${_MEMDISK_DIRECTORY}/memdisk
initrd ${_IMAGE}
append ${_IMAGE_APPEND}"
_NUMBER="$((${_NUMBER} + 1))"
done
_NUMBER=""
Update "${_EXTLINUX_DIRECTORY}/memdisk.cfg" "${_CONFIG}"
fi
if [ "${EXTLINUX_OS_PROBER}" = "true" ] && [ -x "$(which os-prober 2>/dev/null)" ]
then
if [ ! -e /usr/lib/extlinux/chain.c32 ]
then
echo "E: /usr/lib/extlinux/chain.c32: No such file"
exit 1
fi
cp -f /usr/lib/extlinux/chain.c32 "${_EXTLINUX_DIRECTORY}"
# Create os-prober.cfg
_CONFIG="\
## ${_EXTLINUX_DIRECTORY}/os-prober.cfg
##
## IMPORTANT WARNING
##
## The configuration of this file is generated automatically.
## Do not edit this file manually, use: extlinux-update
"
for _OS in $(os-prober | tr ' ' '^' | paste -s -d ' ')
do
_DEVICE="$(echo ${_OS} | cut -d ':' -f 1)"
_LONGNAME="$(echo ${_OS} | cut -d ':' -f 2 | tr '^' ' ')"
_LABEL="$(echo ${_OS} | cut -d ':' -f 3 | tr '^' ' ')"
_BOOT="$(echo ${_OS} | cut -d ':' -f 4)"
if [ "${_BOOT}" != "chain" ]
then
continue
fi
if [ -z "${_LONGNAME}" ]
then
_LONGNAME="${_LABEL}"
fi
_NUMBER="${_NUMBER:-0}"
echo "P: Writing config for ${_LONGNAME} on ${_DEVICE}..."
_DEVICENAME="$(echo ${_DEVICE} | sed -e 's/^\/dev\/[sh]d//' -e 'y/abcdefghij/0123456789/' -e 's/./& /')"
# Writing other os entry
_CONFIG="${_CONFIG}
label o${_NUMBER}
menu label Other OS, ${_LONGNAME} (on ${_DEVICE})
kernel chain.c32
append hd${_DEVICENAME}"
_NUMBER="$((${_NUMBER} + 1))"
done
_NUMBER=""
Update "${_EXTLINUX_DIRECTORY}/os-prober.cfg" "${_CONFIG}"
fi
# Create the main extlinux.conf file
_CONFIG="\
## ${_EXTLINUX_DIRECTORY}/extlinux.conf
##
## IMPORTANT WARNING
##
## The configuration of this file is generated automatically.
## Do not edit this file manually, use: extlinux-update
default ${EXTLINUX_DEFAULT}
prompt 1
timeout ${EXTLINUX_TIMEOUT}
"
if [ -n "${EXTLINUX_THEME}" ] && [ "${EXTLINUX_THEME}" != "none" ]
then
if [ ! -e "/usr/share/syslinux/themes/${EXTLINUX_THEME}/extlinux" ]
then
echo "E: /usr/share/syslinux/themes/${EXTLINUX_THEME}/extlinux: No such file or directory"
exit 1
else
echo -n "P: Installing ${EXTLINUX_THEME} theme..."
rm -rf "${_EXTLINUX_DIRECTORY}/themes/${EXTLINUX_THEME}"
mkdir -p "${_EXTLINUX_DIRECTORY}/themes"
EXTLINUX_THEME_ORIG="$(readlink /usr/share/syslinux/themes/${EXTLINUX_THEME})" || true
if [ -n "${EXTLINUX_THEME_ORIG}" ]
then
cp -aL "/usr/share/syslinux/themes/${EXTLINUX_THEME_ORIG}/extlinux" "${_EXTLINUX_DIRECTORY}/themes/${EXTLINUX_THEME_ORIG}"
ln -sf "${EXTLINUX_THEME_ORIG}" "${_EXTLINUX_DIRECTORY}/themes/${EXTLINUX_THEME}"
else
cp -aL "/usr/share/syslinux/themes/${EXTLINUX_THEME}/extlinux" "${_EXTLINUX_DIRECTORY}/themes/${EXTLINUX_THEME}"
fi
echo " done."
fi
_CONFIG="${_CONFIG}
include themes/${EXTLINUX_THEME}/theme.cfg"
else
_CONFIG="${_CONFIG}
display boot.txt
include linux.cfg"
if [ "${EXTLINUX_MEMDISK}" = "true" ] && [ -e "${_EXTLINUX_DIRECTORY}/memdisk.cfg" ]
then
_CONFIG="${_CONFIG}
include memdisk.cfg"
fi
if [ "${EXTLINUX_OS_PROBER}" = "true" ] && [ -e "${_EXTLINUX_DIRECTORY}/os-prober.cfg" ]
then
_CONFIG="${_CONFIG}
include os-prober.cfg"
fi
if [ ! -e "${_EXTLINUX_DIRECTORY}/boot.txt" ]
then
echo "Wait 5 seconds or press ENTER to " > "${_EXTLINUX_DIRECTORY}/boot.txt"
fi
fi
Update "${_EXTLINUX_DIRECTORY}/extlinux.conf" "${_CONFIG}"
|