c-ludenberg
85cf342892
All package managers built from source with bundled binaries: - xbps 0.60.7 (10 binaries) - apk-tools 3.0.2 - debootstrap 1.0.144 (script + 114 distro scripts) - pacman 7.0 + arch-install-scripts 31 (pacstrap, genfstab, arch-chroot) - dnf5 5.2.x (deps: fmt, toml11, json-c, smartcols, libsolv, librepo, rpm, rpm-sequoia) - rpm 6.1.90
486 lines
13 KiB
Bash
Executable File
486 lines
13 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0-only
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shopt -s extglob
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#!/hint/bash
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# SPDX-License-Identifier: GPL-2.0-only
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# generated from util-linux source: libmount/src/utils.c
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declare -A pseudofs_types=([anon_inodefs]=1
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[apparmorfs]=1
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[autofs]=1
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[bdev]=1
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[binder]=1
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[binfmt_misc]=1
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[bpf]=1
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[cgroup]=1
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[cgroup2]=1
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[configfs]=1
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[cpuset]=1
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[debugfs]=1
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[devfs]=1
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[devpts]=1
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[devtmpfs]=1
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[dlmfs]=1
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[dmabuf]=1
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[drm]=1
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[efivarfs]=1
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[fuse]=1
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[fuse.archivemount]=1
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[fuse.avfsd]=1
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[fuse.dumpfs]=1
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[fuse.encfs]=1
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[fuse.gvfs-fuse-daemon]=1
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[fuse.gvfsd-fuse]=1
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[fuse.lxcfs]=1
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[fuse.portal]=1
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[fuse.rofiles-fuse]=1
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[fuse.vmware-vmblock]=1
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[fuse.xwmfs]=1
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[fusectl]=1
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[hugetlbfs]=1
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[ipathfs]=1
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[mqueue]=1
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[nfsd]=1
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[none]=1
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[nsfs]=1
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[overlay]=1
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[pipefs]=1
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[proc]=1
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[pstore]=1
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[ramfs]=1
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[resctrl]=1
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[rootfs]=1
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[rpc_pipefs]=1
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[securityfs]=1
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[selinuxfs]=1
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[smackfs]=1
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[sockfs]=1
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[spufs]=1
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[sysfs]=1
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[tmpfs]=1
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[tracefs]=1
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[vboxsf]=1
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[virtiofs]=1)
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# generated from: pkgfile -vbr '/fsck\..+' | awk -F. '{ print $NF }' | sort
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declare -A fsck_types=([btrfs]=0 # btrfs doesn't need a regular fsck utility
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[cramfs]=1
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[erofs]=1
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[exfat]=1
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[ext2]=1
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[ext3]=1
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[ext4]=1
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[f2fs]=1
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[fat]=1
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[jfs]=1
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[minix]=1
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[msdos]=1
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[reiserfs]=1
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[vfat]=1
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[xfs]=1)
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# shellcheck disable=SC2059 # $1 and $2 can contain the printf modifiers
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out() { printf "$1 $2\n" "${@:3}"; }
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error() { out "==> ERROR:" "$@"; } >&2
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die() { error "$@"; exit 1; }
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try_cast() (
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_=$(( $1#$2 ))
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) 2>/dev/null
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valid_number_of_base() {
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local base=$1 len=${#2} i=
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for (( i = 0; i < len; i++ )); do
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try_cast "$base" "${2:i:1}" || return 1
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done
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return 0
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}
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mangle() {
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local i=0 chr="" out=""
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local {a..f}= {A..F}=
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for (( i = 0; i < ${#1}; i++ )); do
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chr=${1:i:1}
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case $chr in
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[[:space:]\\])
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printf -v chr '%03o' "'$chr"
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out+=\\
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;;
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esac
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out+=$chr
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done
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printf '%s' "$out"
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}
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unmangle() {
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local i=0 chr="" out="" len=$(( ${#1} - 4 ))
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local {a..f}= {A..F}=
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for (( i = 0; i < len; i++ )); do
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chr=${1:i:1}
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case $chr in
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\\)
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if valid_number_of_base 8 "${1:i+1:3}" ||
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valid_number_of_base 16 "${1:i+1:3}"; then
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printf -v chr '%b' "${1:i:4}"
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(( i += 3 ))
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fi
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;;
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esac
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out+=$chr
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done
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printf '%s' "$out${1:i}"
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}
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optstring_match_option() {
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local candidate pat patterns
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IFS=, read -ra patterns <<<"$1"
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for pat in "${patterns[@]}"; do
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if [[ $pat = *=* ]]; then
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# "key=val" will only ever match "key=val"
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candidate=$2
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else
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# "key" will match "key", but also "key=anyval"
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candidate=${2%%=*}
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fi
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[[ $pat = "$candidate" ]] && return 0
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done
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return 1
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}
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optstring_remove_option() {
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local o options_ remove=$2 IFS=,
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read -ra options_ <<<"${!1}"
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for o in "${!options_[@]}"; do
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optstring_match_option "$remove" "${options_[o]}" && unset 'options_[o]'
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done
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declare -g "$1=${options_[*]}"
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}
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optstring_normalize() {
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local o options_ norm IFS=,
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read -ra options_ <<<"${!1}"
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# remove empty fields
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for o in "${options_[@]}"; do
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[[ $o ]] && norm+=("$o")
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done
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# avoid empty strings, reset to "defaults"
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declare -g "$1=${norm[*]:-defaults}"
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}
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optstring_append_option() {
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if ! optstring_has_option "$1" "$2"; then
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declare -g "$1=${!1},$2"
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fi
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optstring_normalize "$1"
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}
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optstring_prepend_option() {
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if ! optstring_has_option "$1" "$2"; then
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declare -g "$1=$2,${!1}"
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fi
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optstring_normalize "$1"
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}
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optstring_get_option() {
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local _opts o
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IFS=, read -ra _opts <<<"${!1}"
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for o in "${_opts[@]}"; do
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if optstring_match_option "$2" "$o"; then
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declare -g "$o"
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return 0
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fi
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done
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return 1
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}
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optstring_has_option() {
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local "${2%%=*}"
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optstring_get_option "$1" "$2"
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}
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dm_name_for_devnode() {
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read -r dm_name <"/sys/class/block/${1#/dev/}/dm/name"
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if [[ $dm_name ]]; then
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printf '/dev/mapper/%s' "$dm_name"
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else
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# don't leave the caller hanging, just print the original name
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# along with the failure.
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error 'Failed to resolve device mapper name for: %s' "$1"
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fi
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}
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fstype_is_pseudofs() {
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(( pseudofs_types["$1"] ))
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}
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fstype_has_fsck() {
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(( fsck_types["$1"] ))
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}
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write_source() {
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local src=$1 spec="" label="" uuid="" comment=()
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label=$(lsblk -rno LABEL "$1" 2>/dev/null)
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uuid=$(lsblk -rno UUID "$1" 2>/dev/null)
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# bind mounts do not have a UUID!
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case $bytag in
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'')
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[[ $uuid ]] && comment=("UUID=$uuid")
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[[ $label ]] && comment+=("LABEL=$(mangle "$label")")
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;;
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LABEL)
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spec=$label
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[[ $uuid ]] && comment=("$src" "UUID=$uuid")
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;;
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UUID)
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spec=$uuid
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comment=("$src")
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[[ $label ]] && comment+=("LABEL=$(mangle "$label")")
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;;
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*)
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[[ $uuid ]] && comment=("$1" "UUID=$uuid")
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[[ $label ]] && comment+=("LABEL=$(mangle "$label")")
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[[ $bytag ]] && spec=$(lsblk -rno "$bytag" "$1" 2>/dev/null)
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;;
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esac
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[[ -v comment ]] && printf '# %s\n' "${comment[*]}"
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if [[ $spec ]]; then
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printf '%-20s' "$bytag=$(mangle "$spec")"
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else
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printf '%-20s' "$(mangle "$src")"
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fi
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}
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optstring_apply_quirks() {
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local varname=$1 fstype=$2
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# SELinux displays a 'seclabel' option in /proc/self/mountinfo. We can't know
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# if the system we're generating the fstab for has any support for SELinux (as
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# one might install Arch from a Fedora environment), so let's remove it.
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optstring_remove_option "$varname" seclabel
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# Prune 'relatime' option for any pseudofs. This seems to be a rampant
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# default which the kernel often exports even if the underlying filesystem
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# doesn't support it. Example: https://bugs.archlinux.org/task/54554.
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if awk -v fstype="$fstype" '$1 == fstype { exit 1 }' /proc/filesystems; then
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optstring_remove_option "$varname" relatime
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fi
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case $fstype in
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btrfs)
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# Having only one of subvol= and subvolid= is enough for mounting a btrfs subvolume
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# And having subvolid= set prevents things like 'snapper rollback' to work, as it
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# updates the subvolume in-place, leaving subvol= unchanged with a different subvolid.
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if optstring_has_option "$varname" subvol; then
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optstring_remove_option "$varname" subvolid
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fi
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;;
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f2fs)
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# These are build-time or runtime-unchangeable options for f2fs.
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# The former means that kernels supporting the options will only
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# provide the negative versions of these (e.g. noacl), and vice versa
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# for kernels without support.
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# The latter means that the options can only be specified/changed
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# during the initial mount but not remount.
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optstring_remove_option "$varname" noacl,acl,nouser_xattr,user_xattr,atgc
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;;
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vfat)
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# Before Linux v3.8, "cp" is prepended to the value of the codepage.
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# shellcheck disable=SC2154 # codepage is implicitly declared through optstring_get_option
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if optstring_get_option "$varname" "codepage" && [[ "$codepage" = cp* ]]; then
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optstring_remove_option "$varname" "codepage"
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optstring_append_option "$varname" "codepage=${codepage#cp}"
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fi
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;;
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esac
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}
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usage() {
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cat <<EOF
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usage: ${0##*/} [options] root
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Options:
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-f <filter> Restrict output to mountpoints matching the prefix FILTER
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-L Use labels for source identifiers (shortcut for -t LABEL)
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-p Exclude pseudofs mounts (default behavior)
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-P Include pseudofs mounts
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-t <tag> Use TAG for source identifiers (TAG should be one of: LABEL,
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UUID, PARTLABEL, PARTUUID)
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-U Use UUIDs for source identifiers (shortcut for -t UUID)
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-h Print this help message
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genfstab generates output suitable for addition to an fstab file based on the
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devices mounted under the mountpoint specified by the given root.
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EOF
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}
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if [[ -z $1 || $1 = @(-h|--help) ]]; then
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usage
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exit $(( $# ? 0 : 1 ))
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fi
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while getopts ':f:LPpt:U' flag; do
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case $flag in
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L)
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bytag=LABEL
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;;
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U)
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bytag=UUID
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;;
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f)
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prefixfilter=$OPTARG
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;;
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P)
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pseudofs=1
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;;
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p)
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pseudofs=0
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;;
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t)
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bytag=${OPTARG^^}
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;;
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:)
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die '%s: option requires an argument -- '\''%s'\' "${0##*/}" "$OPTARG"
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;;
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?)
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die '%s: invalid option -- '\''%s'\' "${0##*/}" "$OPTARG"
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;;
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esac
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done
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shift $(( OPTIND - 1 ))
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(( $# )) || die "No root directory specified"
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root=$(realpath -mL "$1"); shift
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if ! mountpoint -q "$root"; then
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die "$root is not a mountpoint"
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fi
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# handle block devices
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while read -r src target fstype opts fsroot; do
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if (( !pseudofs )) && fstype_is_pseudofs "$fstype"; then
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continue
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fi
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[[ $target = "$prefixfilter"* ]] || continue
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# default 5th and 6th columns
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dump=0 pass=2
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src=$(unmangle "$src")
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target=$(unmangle "$target")
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target=${target#"$root"}
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if (( !foundroot )) && findmnt "$src" "$root" >/dev/null; then
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# this is root. we can't possibly have more than one...
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pass=1 foundroot=1
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fi
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# if there's no fsck tool available, then only pass=0 makes sense.
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if ! fstype_has_fsck "$fstype"; then
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pass=0
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fi
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if [[ $fsroot != / && $fstype != btrfs ]]; then
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# it's a bind mount
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src=$(findmnt -funcevo TARGET "$src")$fsroot
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src="/${src#"${root}/"}"
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if [[ $src -ef $target ]]; then
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# hrmm, this is weird. we're probably looking at a file or directory
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# that was bound into a chroot from the host machine. Ignore it,
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# because this won't actually be a valid mount. Worst case, the user
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# just re-adds it.
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continue
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fi
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fstype=none
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opts+=,bind
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pass=0
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fi
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# filesystem quirks
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case $fstype in
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fuseblk)
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# well-behaved FUSE filesystems will report themselves as fuse.$fstype.
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# this is probably NTFS-3g, but let's just make sure.
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if ! newtype=$(lsblk -no FSTYPE "$src") || [[ -z $newtype ]]; then
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# avoid blanking out fstype, leading to an invalid fstab
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error 'Failed to derive real filesystem type for FUSE device on %s' "$target"
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else
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fstype=$newtype
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fi
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;;
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esac
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optstring_apply_quirks "opts" "$fstype"
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# write one line
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write_source "$src"
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printf '\t%-10s' "/$(mangle "${target#/}")" "$fstype" "$opts"
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printf '\t%s %s' "$dump" "$pass"
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printf '\n\n'
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done < <(findmnt -Recvruno SOURCE,TARGET,FSTYPE,OPTIONS,FSROOT "$root")
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# handle swaps devices
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{
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# ignore header
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read -r
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while read -r device type _ _ prio; do
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options=defaults
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if (( prio >= 0 )); then
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options+=,pri=$prio
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fi
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# skip files marked deleted by the kernel
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[[ $device = *'\040(deleted)' ]] && continue
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# skip devices not part of the prefix
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[[ $device = "$prefixfilter"* ]] || continue
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# skip zram devices
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[[ $device == *'zram'* ]] && continue
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if [[ $type = file ]]; then
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printf '%-20s' "${device#"${root%/}"}"
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elif [[ $device = /dev/dm-+([0-9]) ]]; then
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# device mapper doesn't allow characters we need to worry
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# about being mangled, and it does the escaping of dashes
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# for us in sysfs.
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write_source "$(dm_name_for_devnode "$device")"
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else
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write_source "$(unmangle "$device")"
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fi
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printf '\t%-10s\t%-10s\t%-10s\t0 0\n\n' 'none' 'swap' "$options"
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done
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} </proc/swaps
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