Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v8
Fetching contributors…

Cannot retrieve contributors at this time

158 lines (130 sloc) 3.301 kb
#!/bin/bash
shopt -s extglob
m4_include(common)
write_source() {
local src=$1 tag= spec= label= uuid= comment=()
label=$(blkid -s LABEL -o value "$1" 2>/dev/null)
uuid=$(blkid -s UUID -o value "$1" 2>/dev/null)
if (( bylabel )); then
tag=LABEL
spec=$label
comment=("$src" "UUID=$uuid")
elif (( byuuid )); then
tag=UUID
spec=$uuid
comment=("$src")
if [[ $label ]]; then
comment+=("LABEL=$label")
fi
else
[[ $uuid ]] && comment+=("UUID=$uuid")
[[ $label ]] && comment+=("LABEL=$label")
fi
[[ $comment ]] && printf '# %s\n' "${comment[*]}"
if [[ $spec ]]; then
printf '%-20s' "$tag=$spec"
else
printf '%-20s' "$(mangle "$src")"
fi
}
usage() {
cat <<EOF
usage: ${0##*/} root [options]
Options:
-L Use labels for source identifiers
-p Avoid printing pseudofs mounts
-U Use UUIDs for source identifiers
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 ':LpU' flag; do
case $flag in
L)
bylabel=1
;;
U)
byuuid=1
;;
p)
nopseudofs=1
;;
:)
die '%s: option requires an argument -- '\''%s'\' "${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 "$root is not a mountpoint"
fi
if (( bylabel && byuuid )); then
die "cannot specify both -U and -L"
fi
# handle block devices
findmnt -Recvruno SOURCE,TARGET,FSTYPE,OPTIONS,FSROOT "$root" |
while read -r src target fstype opts fsroot; do
# default 5th and 6th columns
dump=0 pass=2
src=$(unmangle "$src")
target=$(unmangle "$target")
# this is root
target=${target#$root}
if [[ $target = / ]]; then
pass=1
fi
# we don't fsck pseudofs
if fstype_is_pseudofs "$fstype"; then
(( nopseudofs )) && continue
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 $target ]]; then
# hrmm, this is weird. we're probably looking at a file or directory
# that was bound into a chroot from the host machine. Ignore it,
# because this won't actually be a valid mount. Worst case, the user
# just re-adds it.
continue
fi
fstype=bind
pass=0
fi
fi
# write one line
write_source "$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
if [[ $type = file ]]; then
printf '%-20s' "$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:
Jump to Line
Something went wrong with that request. Please try again.