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#!/bin/sh
# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
. /usr/share/grub/grub-mkconfig_lib
if [ -r /etc/default/systemrescuecd ] ; then
. /etc/default/systemrescuecd
fi
COPY_SRCD_TO_BOOT=${COPY_SRCD_TO_BOOT:-no}
bootdir="/boot"
installdir="/usr/share/systemrescuecd"
isorex='^(/.*/)?systemrescuecd-.*[.]iso$'
# Path of the link to the newest ISO, created by ebuild
srcd="${installdir}/systemrescuecd-x86-newest.iso"
# Extract ISO version
isovsed() {
sed -E 's|^.*systemrescuecd(-x86)?-||;s|.iso$||'
}
# Find ISOs in a given directory
isofind() {
find "${1}" -maxdepth 1 -type f -regextype egrep -regex ${isorex}
}
# Copy ISO to boot partition
copy_srcd_iso() {
if [ ! -f "${bootdir}/"$(basename "${1}") ]; then
if [ $(df -k --output=avail "${bootdir}" | tail -1) -gt $(du -k "${1}" | cut -f 1) ]; then
cp "${1}" "${bootdir}/"
else
# Before complaining, check if the installed ISO is actually newer
if $(printf '%s\n' $(isofind "${bootdir}" | isovsed | sort -V) $(echo "${1}" | isovsed) | sort -VC); then
gettext_printf "Error: Not enough free disk space on ${bootdir}!\n" >&2
gettext_printf "Error: Failed to copy the new iso!\n" >&2
fi
fi
fi
}
write_srcd() {
cat <<EOF
menuentry "${longname} [${1}] (Copy to RAM${bootops}" --class rescue {
${grub_string}
set gfxpayload=keep
set isofile=${path}
loopback loop \${isofile}
linux (loop)/sysresccd/boot/x86_64/vmlinuz archisobasedir=sysresccd img_loop=\${isofile} img_dev=${diskuuid} copytoram ${SRCD_BOOTOPTIONS}
initrd (loop)/sysresccd/boot/intel_ucode.img (loop)/sysresccd/boot/amd_ucode.img (loop)/sysresccd/boot/x86_64/sysresccd.img
}
menuentry "${longname} [${1}] (Copy to RAM with persistence${bootops}" --class rescue {
${grub_string}
set gfxpayload=keep
set isofile=${path}
loopback loop \${isofile}
linux (loop)/sysresccd/boot/x86_64/vmlinuz archisobasedir=sysresccd img_loop=\${isofile} img_dev=${diskuuid} cow_device=${diskuuid} cow_directory=/persistent_sysresccd-${1}/x86_64 copytoram ${SRCD_BOOTOPTIONS}
initrd (loop)/sysresccd/boot/intel_ucode.img (loop)/sysresccd/boot/amd_ucode.img (loop)/sysresccd/boot/x86_64/sysresccd.img
}
menuentry "${longname} [${1}] (Minimal${bootops}" --class rescue {
${grub_string}
set gfxpayload=keep
set isofile=${path}
loopback loop \${isofile}
linux (loop)/sysresccd/boot/x86_64/vmlinuz archisobasedir=sysresccd img_loop=\${isofile} img_dev=${diskuuid} ${SRCD_BOOTOPTIONS}
initrd (loop)/sysresccd/boot/intel_ucode.img (loop)/sysresccd/boot/amd_ucode.img (loop)/sysresccd/boot/x86_64/sysresccd.img
}
EOF
}
write_srcd_5() {
cat <<EOF
menuentry "${longname} [${1}] (64bit${bootops}" --class rescue {
${grub_string}
set isofile=${path}
loopback loop \${isofile}
linux (loop)/isolinux/rescue64 ${SRCD_BOOTOPTIONS} isoloop=\${isofile}
initrd (loop)/isolinux/initram.igz
}
menuentry "${longname} [${1}] (32bit${bootops}" --class rescue {
${grub_string}
set isofile=${path}
loopback loop \${isofile}
linux (loop)/isolinux/rescue32 ${SRCD_BOOTOPTIONS} isoloop=\${isofile}
initrd (loop)/isolinux/initram.igz
}
EOF
}
# Get v5 ISOs
# Use: isogrep5 [-v]
# -v invert match
isogrep5() {
ls -rv "${isopref}"/systemrescuecd-*.iso | grep ${1} -e '-x86-5'
}
write_srcd_submenu() {
# Start submenu
echo "submenu \"${longname}\" --class submenu {"
# Make sure to reverse-sort by version
for iso in $(isogrep5 -v; isogrep5); do
path=$(make_system_path_relative_to_its_root "${iso}")
gettext_printf " image: ${iso}\n" >&2
if $(printf '%s\n' "6.0.0" $(echo ${iso} | isovsed) | sort -VC); then
write_srcd $(echo ${iso} | isovsed)
else
write_srcd_5 $(echo ${iso} | isovsed)
fi
done
# End submenu
echo "}"
}
bootops=")"
if [ ! -z "${SRCD_BOOTOPTIONS}" ]; then
bootops=" with bootoptions)"
fi
if [ "${COPY_SRCD_TO_BOOT}" = yes ]; then
srcd=$(realpath "${srcd}")
copy_srcd_iso "${srcd}"
fi
# Build menu entries
for isopref in "${bootdir}" "${installdir}"; do
# Make sure there are any ISOs
ls "${isopref}" | grep -E -q -e "${isorex}" || continue
diskuuid=/dev/disk/by-uuid/$(${grub_probe} --target=fs_uuid "${isopref}")
device=$(${grub_probe} --target=device "${isopref}")
label=$(${grub_probe} --target=fs_label "${isopref}")
[ "${label}" = "(null)" ] && label=${device}
grub_string=$(prepare_grub_to_access_device "${device}" | grub_add_tab | grub_add_tab)
longname="SystemRescueCD on ${label}"
gettext_printf "Found %s on %s\n" "${longname}" "${device}" >&2
write_srcd_submenu
done
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