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Add possibility to boot without init (#164)

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* Add possibility to boot without init(rd,ramfs):
  - For a snapshot to be valid, it must contain a boot folder and a kernel from the official list (or have been added to the custom kernel list)
  - if a snapshot doesn't contain an init(rd,ramfs), it will be detected as valid.
  - Suppress script stop when an init is not found
  - If init isn't found, add the letter "x" to the init list. (hoping this doesn't break the support for custom init names)
  - The microcode support is still present, despite the absence of init(rd,ramfs), is it really relevant ?
This commit is contained in:
Antynea
2021-09-17 15:39:23 +02:00
committed by GitHub
parent 981777d745
commit 679d000446
1 changed files with 54 additions and 23 deletions
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77
41_snapshots-btrfs
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@@ -156,23 +156,23 @@ make_menu_entries()
[[ ! -f "${boot_dir}"/"${k}" ]] && continue;
kversion=${k#*"-"}
for i in "${name_initramfs[@]}"; do
prefix_i=${i%%"-"*}
suffix_i=${i#*"-"}
alt_suffix_i=${i##*"-"}
if [ "${kversion}" = "${suffix_i}" ]; then i="${i}";
elif [ "${kversion}.img" = "${suffix_i}" ]; then i="${i}";
elif [ "${kversion}-fallback.img" = "${suffix_i}" ]; then i="${i}";
elif [ "${kversion}.gz" = "${suffix_i}" ]; then i="${i}";
else continue ;
fi
for u in "${name_microcode[@]}"; do
if [[ "${name_microcode}" != "x" ]] ; then
if [[ "${name_initramfs}" != "x" ]] ; then
prefix_i=${i%%"-"*}
suffix_i=${i#*"-"}
alt_suffix_i=${i##*"-"}
if [ "${kversion}" = "${suffix_i}" ]; then i="${i}";
elif [ "${kversion}.img" = "${suffix_i}" ]; then i="${i}";
elif [ "${kversion}-fallback.img" = "${suffix_i}" ]; then i="${i}";
elif [ "${kversion}.gz" = "${suffix_i}" ]; then i="${i}";
fi
for u in "${name_microcode[@]}"; do
if [[ "${name_microcode}" != "x" ]] ; then
entry "
menuentry '"${k}" & "${i}" & "${u}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
else
else
entry "
menuentry '"${k}" & "${i}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
fi
fi
entry "\
if [ x\$feature_all_video_module = xy ]; then
insmod all_video
@@ -187,18 +187,50 @@ make_menu_entries()
echo 'Loading Snapshot: "${snap_date_time}" "${snap_dir_name}"'
echo 'Loading Kernel: "${k}" ...'
linux \"${boot_dir_root_grub}/"${k}"\" root="${LINUX_ROOT_DEVICE}" ${kernel_parameters} ${rootflags}subvol=\""${snap_dir_name}"\""
if [[ "${name_microcode}" != "x" ]] ; then
entry "\
if [[ "${name_microcode}" != "x" ]] ; then
entry "\
echo 'Loading Microcode & Initramfs: "${u}" "${i}" ...'
initrd \"${boot_dir_root_grub}/"${u}"\" \"${boot_dir_root_grub}/"${i}"\""
else
entry "\
else
entry "\
echo 'Loading Initramfs: "${i}" ...'
initrd \"${boot_dir_root_grub}/"${i}"\""
fi
entry " }"
count_warning_menuentries=$((1+$count_warning_menuentries))
done
fi
entry " }"
count_warning_menuentries=$((1+$count_warning_menuentries))
done
else
for u in "${name_microcode[@]}"; do
if [[ "${name_microcode}" != "x" ]] ; then
entry "
menuentry '"${k}" & "${u}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
else
entry "
menuentry '"${k}"' ${CLASS} "\$menuentry_id_option" 'gnulinux-snapshots-$boot_uuid' {"
fi
entry "\
if [ x\$feature_all_video_module = xy ]; then
insmod all_video
fi
set gfxpayload=keep
insmod ${boot_fs}
if [ x\$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root ${boot_hs} ${boot_uuid}
else
search --no-floppy --fs-uuid --set=root ${boot_uuid}
fi
echo 'Loading Snapshot: "${snap_date_time}" "${snap_dir_name}"'
echo 'Loading Kernel: "${k}" ...'
linux \"${boot_dir_root_grub}/"${k}"\" root="${LINUX_ROOT_DEVICE}" ${kernel_parameters} ${rootflags}subvol=\""${snap_dir_name}"\""
if [[ "${name_microcode}" != "x" ]] ; then
entry "\
echo 'Loading Microcode: "${u}" ...'
initrd \"${boot_dir_root_grub}/"${u}"\""
fi
entry " }"
count_warning_menuentries=$((1+$count_warning_menuentries))
done
fi
done
done
entry "}"
@@ -360,6 +392,7 @@ detect_initramfs()
list_initramfs+=("$cinitramfs")
done
fi
if [ -z "${list_initramfs}" ]; then list_initramfs=(x); fi
}
## Detect microcode in "/boot"
@@ -436,7 +469,6 @@ boot_bounded()
detect_rootflags
# Initramfs (Original + custom initramfs)
detect_initramfs
if [ -z "${list_initramfs}" ]; then continue; fi
name_initramfs=("${list_initramfs[@]##*"/"}")
# microcode (auto-detect + custom microcode)
detect_microcode
@@ -473,7 +505,6 @@ boot_separate()
name_kernel=("${list_kernel[@]##*"/"}")
# Initramfs (Original + custom initramfs)
detect_initramfs
if [ -z "${list_initramfs}" ]; then print_error "Initramfs not found."; fi
name_initramfs=("${list_initramfs[@]##*"/"}")
# microcode (auto-detect + custom microcode)
detect_microcode