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manjaro-tools/bin/fstabgen.in
udeved b5e25d04ed moving files
2014-10-04 08:27:55 +02:00

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#!/bin/bash
shopt -s extglob
# generated from util-linux source: libmount/src/utils.c
# declare -A pseudofs_types=([anon_inodefs]=1
# [autofs]=1
# [bdev]=1
# [binfmt_misc]=1
# [cgroup]=1
# [configfs]=1
# [cpuset]=1
# [debugfs]=1
# [devfs]=1
# [devpts]=1
# [devtmpfs]=1
# [dlmfs]=1
# [fuse.gvfs-fuse-daemon]=1
# [fusectl]=1
# [hugetlbfs]=1
# [mqueue]=1
# [nfsd]=1
# [none]=1
# [pipefs]=1
# [proc]=1
# [pstore]=1
# [ramfs]=1
# [rootfs]=1
# [rpc_pipefs]=1
# [securityfs]=1
# [sockfs]=1
# [spufs]=1
# [sysfs]=1
# [tmpfs]=1)
#
# # generated from: pkgfile -vbr '/fsck\..+' | awk -F. '{ print $NF }' | sort
# declare -A fsck_types=([cramfs]=1
# [exfat]=1
# [ext2]=1
# [ext3]=1
# [ext4]=1
# [ext4dev]=1
# [jfs]=1
# [minix]=1
# [msdos]=1
# [reiserfs]=1
# [vfat]=1
# [xfs]=1)
#
# out() { printf "$1 $2\n" "${@:3}"; }
# error() { out "==> ERROR:" "$@"; } >&2
# msg() { out "==>" "$@"; }
# msg2() { out " ->" "$@";}
# die() { error "$@"; exit 1; }
#
# ignore_error() {
# "$@" 2>/dev/null
# return 0
# }
#
# in_array() {
# local i
# for i in "${@:2}"; do
# [[ $1 = "$i" ]] && return
# done
# }
#
# track_mount() {
# if [[ -z $CHROOT_ACTIVE_MOUNTS ]]; then
# CHROOT_ACTIVE_MOUNTS=()
# trap 'chroot_umount' EXIT
# fi
#
# mount "$@" && CHROOT_ACTIVE_MOUNTS=("$2" "${CHROOT_ACTIVE_MOUNTS[@]}")
# }
#
# mount_conditionally() {
# local cond=$1; shift
# if eval "$cond"; then
# track_mount "$@"
# fi
# }
#
# api_fs_mount() {
# mount_conditionally "! mountpoint -q '$1'" "$1" "$1" --bind &&
# track_mount proc "$1/proc" -t proc -o nosuid,noexec,nodev &&
# track_mount sys "$1/sys" -t sysfs -o nosuid,noexec,nodev,ro &&
# ignore_error mount_conditionally "[[ -d '$1/sys/firmware/efi/efivars' ]]" \
# efivarfs "$1/sys/firmware/efi/efivars" -t efivarfs -o nosuid,noexec,nodev &&
# track_mount udev "$1/dev" -t devtmpfs -o mode=0755,nosuid &&
# track_mount devpts "$1/dev/pts" -t devpts -o mode=0620,gid=5,nosuid,noexec &&
# track_mount shm "$1/dev/shm" -t tmpfs -o mode=1777,nosuid,nodev &&
# track_mount run "$1/run" -t tmpfs -o nosuid,nodev,mode=0755 &&
# track_mount tmp "$1/tmp" -t tmpfs -o mode=1777,strictatime,nodev,nosuid
# }
#
# chroot_umount() {
# umount "${CHROOT_ACTIVE_MOUNTS[@]}"
# }
#
# valid_number_of_base() {
# local base=$1 len=${#2} i=
#
# for (( i = 0; i < len; i++ )); do
# { _=$(( $base#${2:i:1} )) || return 1; } 2>/dev/null
# done
#
# return 0
# }
#
# mangle() {
# local i= chr= out=
#
# unset {a..f} {A..F}
#
# for (( i = 0; i < ${#1}; i++ )); do
# chr=${1:i:1}
# case $chr in
# [[:space:]\\])
# printf -v chr '%03o' "'$chr"
# out+=\\
# ;;
# esac
# out+=$chr
# done
#
# printf '%s' "$out"
# }
#
# unmangle() {
# local i= chr= out= len=$(( ${#1} - 4 ))
#
# unset {a..f} {A..F}
#
# for (( i = 0; i < len; i++ )); do
# chr=${1:i:1}
# case $chr in
# \\)
# if valid_number_of_base 8 "${1:i+1:3}" ||
# valid_number_of_base 16 "${1:i+1:3}"; then
# printf -v chr '%b' "${1:i:4}"
# (( i += 3 ))
# fi
# ;;
# esac
# out+=$chr
# done
#
# printf '%s' "$out${1:i}"
# }
#
# dm_name_for_devnode() {
# read dm_name <"/sys/class/block/${1#/dev/}/dm/name"
# if [[ $dm_name ]]; then
# printf '/dev/mapper/%s' "$dm_name"
# else
# # don't leave the caller hanging, just print the original name
# # along with the failure.
# print '%s' "$1"
# error 'Failed to resolve device mapper name for: %s' "$1"
# fi
# }
#
# fstype_is_pseudofs() {
# (( pseudofs_types["$1"] ))
# }
#
# fstype_has_fsck() {
# (( fsck_types["$1"] ))
# }
#
source @libdir@/functions.sh
write_source() {
local src=$1 spec= label= uuid= comment=()
label=$(lsblk -rno LABEL "$1" 2>/dev/null)
uuid=$(lsblk -rno UUID "$1" 2>/dev/null)
# bind mounts do not have a UUID!
case $bytag in
'')
[[ $uuid ]] && comment=("UUID=$uuid")
[[ $label ]] && comment+=("LABEL=$(mangle "$label")")
;;
LABEL)
spec=$label
[[ $uuid ]] && comment=("$src" "UUID=$uuid")
;;
UUID)
spec=$uuid
comment=("$src")
[[ $label ]] && comment+=("LABEL=$(mangle "$label")")
;;
*)
[[ $uuid ]] && comment=("$1" "UUID=$uuid")
[[ $label ]] && comment+=("LABEL=$(mangle "$label")")
[[ $bytag ]] && spec=$(lsblk -rno "$bytag" "$1" 2>/dev/null)
;;
esac
[[ $comment ]] && printf '# %s\n' "${comment[*]}"
if [[ $spec ]]; then
printf '%-20s' "$bytag=$(mangle "$spec")"
else
printf '%-20s' "$(mangle "$src")"
fi
}
usage() {
cat <<EOF
usage: ${0##*/} [options] root
Options:
-L Use labels for source identifiers (shortcut for -t LABEL)
-p Avoid printing pseudofs mounts
-t TAG Use TAG for source identifiers
-U Use UUIDs for source identifiers (shortcut for -t UUID)
-h Print this help message
genfstab generates output suitable for addition to an fstab file based on the
devices mounted under the mountpoint specified by the given root.
EOF
}
if [[ -z $1 || $1 = @(-h|--help) ]]; then
usage
exit $(( $# ? 0 : 1 ))
fi
while getopts ':Lpt:U' flag; do
case $flag in
L)
bytag=LABEL
;;
U)
bytag=UUID
;;
p)
nopseudofs=1
;;
t)
bytag=${OPTARG^^}
;;
:)
die '%s: option requires an argument -- '\''%s'\' "${0##*/}" "$OPTARG"
;;
?)
die '%s: invalid option -- '\''%s'\' "${0##*/}" "$OPTARG"
;;
esac
done
shift $(( OPTIND - 1 ))
(( $# )) || die "No root directory specified"
root=$1; shift
if ! mountpoint -q "$root"; then
die "$root is not a mountpoint"
fi
# handle block devices
findmnt -Recvruno SOURCE,TARGET,FSTYPE,OPTIONS,FSROOT "$root" |
while read -r src target fstype opts fsroot; do
if (( nopseudofs )) && fstype_is_pseudofs "$fstype"; then
continue
fi
# default 5th and 6th columns
dump=0 pass=2
src=$(unmangle "$src")
target=$(unmangle "$target")
target=${target#$root}
if (( !foundroot )) && findmnt "$src" "$root" >/dev/null; then
# this is root. we can't possibly have more than one...
pass=1 foundroot=1
fi
# if there's no fsck tool available, then only pass=0 makes sense.
if ! fstype_has_fsck "$fstype"; then
pass=0
fi
if [[ $fsroot != / ]]; then
if [[ $fstype = btrfs ]]; then
opts+=,subvol=${fsroot#/}
else
# it's a bind mount
src=$(findmnt -funcevo TARGET "$src")$fsroot
if [[ $src -ef $target ]]; then
# hrmm, this is weird. we're probably looking at a file or directory
# that was bound into a chroot from the host machine. Ignore it,
# because this won't actually be a valid mount. Worst case, the user
# just re-adds it.
continue
fi
fstype=none
opts+=,bind
pass=0
fi
fi
# filesystem quirks
case $fstype in
fuseblk)
# well-behaved FUSE filesystems will report themselves as fuse.$fstype.
# this is probably NTFS-3g, but let's just make sure.
if ! newtype=$(lsblk -no FSTYPE "$src") || [[ -z $newtype ]]; then
# avoid blanking out fstype, leading to an invalid fstab
error 'Failed to derive real filesystem type for FUSE device on %s' "$target"
else
fstype=$newtype
fi
;;
esac
# write one line
write_source "$src"
printf '\t%-10s' "/$(mangle "${target#/}")" "$fstype" "$opts"
printf '\t%s %s' "$dump" "$pass"
printf '\n\n'
done
# handle swaps devices
{
# ignore header
read
while read -r device type _ _ prio; do
options=defaults
if [[ $prio != -1 ]]; then
options+=,pri=$prio
fi
# skip files marked deleted by the kernel
[[ $device = *'\040(deleted)' ]] && continue
if [[ $type = file ]]; then
printf '%-20s' "$device"
elif [[ $device = /dev/dm-+([0-9]) ]]; then
# device mapper doesn't allow characters we need to worry
# about being mangled, and it does the escaping of dashes
# for us in sysfs.
write_source "$(dm_name_for_devnode "$device")"
else
write_source "$(unmangle "$device")"
fi
printf '\t%-10s\t%-10s\t%-10s\t0 0\n\n' 'none' 'swap' "$options"
done
} </proc/swaps
# vim: et ts=2 sw=2 ft=sh:
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