FM / sbin

/snap/core20/2769/usr/sbin

Name	Size	Mode	Actions
aa-remove-unknown	3068	0755	edit dl rm
aa-status	8839	0755	edit dl rm
aa-teardown	139	0755	edit dl rm
add-shell	860	0755	edit dl rm
addgroup	37785	0755	edit dl rm
adduser	37785	0755	edit dl rm
agetty	69000	0755	edit dl rm
apparmor_parser	1526368	0755	edit dl rm
apparmor_status	8839	0755	edit dl rm
arpd	80144	0755	edit dl rm
arptables	220488	0755	edit dl rm
arptables-nft	220488	0755	edit dl rm
arptables-nft-restore	220488	0755	edit dl rm
arptables-nft-save	220488	0755	edit dl rm
arptables-restore	220488	0755	edit dl rm
arptables-save	220488	0755	edit dl rm
badblocks	35144	0755	edit dl rm
blkdeactivate	14837	0755	edit dl rm
blkdiscard	35048	0755	edit dl rm
blkid	121096	0755	edit dl rm
blkzone	71912	0755	edit dl rm
blockdev	67816	0755	edit dl rm
bridge	104760	0755	edit dl rm
capsh	31032	0755	edit dl rm
cfdisk	105048	0755	edit dl rm
chcpu	47336	0755	edit dl rm
chgpasswd	67792	0755	edit dl rm
chmem	63720	0755	edit dl rm
chpasswd	59600	0755	edit dl rm
chroot	43352	0755	edit dl rm
cpgr	61784	0755	edit dl rm
cppw	61784	0755	edit dl rm
cryptdisks_start	1544	0755	edit dl rm
cryptdisks_stop	844	0755	edit dl rm
cryptsetup	138792	0755	edit dl rm
cryptsetup-reencrypt	107848	0755	edit dl rm
ctrlaltdel	39144	0755	edit dl rm
debugfs	231224	0755	edit dl rm
delgroup	16495	0755	edit dl rm
deluser	16495	0755	edit dl rm
depmod	170352	0755	edit dl rm
devlink	154080	0755	edit dl rm
dhclient	521200	0755	edit dl rm
dhclient-script	16304	0755	edit dl rm
dmsetup	175128	0755	edit dl rm
dmstats	175128	0755	edit dl rm
dosfsck	59472	0755	edit dl rm
dosfslabel	55376	0755	edit dl rm
dumpe2fs	31112	0755	edit dl rm
e2freefrag	18816	0755	edit dl rm
e2fsck	335064	0755	edit dl rm
e2image	43400	0755	edit dl rm
e2label	109112	0755	edit dl rm
e2mmpstatus	31112	0755	edit dl rm
e2scrub	7296	0755	edit dl rm
e2scrub_all	5395	0755	edit dl rm
e2undo	22912	0755	edit dl rm
e4crypt	31104	0755	edit dl rm
e4defrag	35128	0755	edit dl rm
ebtables	220488	0755	edit dl rm
ebtables-nft	220488	0755	edit dl rm
ebtables-nft-restore	220488	0755	edit dl rm
ebtables-nft-save	220488	0755	edit dl rm
ebtables-restore	220488	0755	edit dl rm
ebtables-save	220488	0755	edit dl rm
faillock	14488	0755	edit dl rm
fatlabel	55376	0755	edit dl rm
fdformat	35048	0755	edit dl rm
fdisk	153880	0755	edit dl rm
filefrag	18768	0755	edit dl rm
findfs	14568	0755	edit dl rm
fsck	55576	0755	edit dl rm
fsck.cramfs	39176	0755	edit dl rm
fsck.ext2	335064	0755	edit dl rm
fsck.ext3	335064	0755	edit dl rm
fsck.ext4	335064	0755	edit dl rm
fsck.fat	59472	0755	edit dl rm
fsck.minix	125184	0755	edit dl rm
fsck.msdos	59472	0755	edit dl rm
fsck.vfat	59472	0755	edit dl rm
fsfreeze	14568	0755	edit dl rm
fstab-decode	14648	0755	edit dl rm
fstrim	71912	0755	edit dl rm
genl	84264	0755	edit dl rm
getcap	14648	0755	edit dl rm
getpcaps	14648	0755	edit dl rm
getty	69000	0755	edit dl rm
groupadd	93136	0755	edit dl rm
groupdel	88848	0755	edit dl rm
groupmems	63736	0755	edit dl rm
groupmod	97136	0755	edit dl rm
grpck	63672	0755	edit dl rm
grpconv	59448	0755	edit dl rm
grpunconv	59448	0755	edit dl rm
halt	1119856	0755	edit dl rm
hwclock	104808	0755	edit dl rm
iconvconfig	31128	0755	edit dl rm
init	1849992	0755	edit dl rm
insmod	170352	0755	edit dl rm
installkernel	2638	0755	edit dl rm
integritysetup	61672	0755	edit dl rm
invoke-rc.d	17042	0755	edit dl rm
ip	718896	0755	edit dl rm
ip6tables	99296	0755	edit dl rm
ip6tables-apply	7057	0755	edit dl rm
ip6tables-legacy	99296	0755	edit dl rm
ip6tables-legacy-restore	99296	0755	edit dl rm
ip6tables-legacy-save	99296	0755	edit dl rm
ip6tables-nft	220488	0755	edit dl rm
ip6tables-nft-restore	220488	0755	edit dl rm
ip6tables-nft-save	220488	0755	edit dl rm
ip6tables-restore	99296	0755	edit dl rm
ip6tables-restore-translate	220488	0755	edit dl rm
ip6tables-save	99296	0755	edit dl rm
ip6tables-translate	220488	0755	edit dl rm
iptables	99296	0755	edit dl rm
iptables-apply	7057	0755	edit dl rm
iptables-legacy	99296	0755	edit dl rm
iptables-legacy-restore	99296	0755	edit dl rm
iptables-legacy-save	99296	0755	edit dl rm
iptables-nft	220488	0755	edit dl rm
iptables-nft-restore	220488	0755	edit dl rm
iptables-nft-save	220488	0755	edit dl rm
iptables-restore	99296	0755	edit dl rm
iptables-restore-translate	220488	0755	edit dl rm
iptables-save	99296	0755	edit dl rm
iptables-translate	220488	0755	edit dl rm
isosize	30952	0755	edit dl rm
killall5	27016	0755	edit dl rm
ldattach	35048	0755	edit dl rm
ldconfig	387	0755	edit dl rm
ldconfig.real	1053768	0755	edit dl rm
logsave	14496	0755	edit dl rm
losetup	112992	0755	edit dl rm
lsmod	170352	0755	edit dl rm
luksformat	3401	0755	edit dl rm
mkdosfs	35328	0755	edit dl rm
mke2fs	137848	0755	edit dl rm
mkfs	14568	0755	edit dl rm
mkfs.bfs	35048	0755	edit dl rm
mkfs.cramfs	43168	0755	edit dl rm
mkfs.ext2	137848	0755	edit dl rm
mkfs.ext3	137848	0755	edit dl rm
mkfs.ext4	137848	0755	edit dl rm
mkfs.fat	35328	0755	edit dl rm
mkfs.minix	108784	0755	edit dl rm
mkfs.msdos	35328	0755	edit dl rm
mkfs.vfat	35328	0755	edit dl rm
mkhomedir_helper	22704	0755	edit dl rm
mklost+found	14648	0755	edit dl rm
mkswap	108784	0755	edit dl rm
modinfo	170352	0755	edit dl rm
modprobe	170352	0755	edit dl rm
netplan	798	0755	edit dl rm
newusers	101168	0755	edit dl rm
nfnl_osf	18736	0755	edit dl rm
nologin	14640	0755	edit dl rm
pam-auth-update	20335	0755	edit dl rm
pam_extrausers_chkpwd	43168	2755	edit dl rm
pam_extrausers_update	43168	0755	edit dl rm
pam_getenv	2890	0755	edit dl rm
pam_tally	14504	0755	edit dl rm
pam_tally2	18600	0755	edit dl rm
pam_timestamp_check	14488	0755	edit dl rm
pivot_root	14568	0755	edit dl rm
poweroff	1119856	0755	edit dl rm
pwck	59568	0755	edit dl rm
pwconv	55344	0755	edit dl rm
pwunconv	55352	0755	edit dl rm
raw	14568	0755	edit dl rm
readprofile	22792	0755	edit dl rm
reboot	1119856	0755	edit dl rm
remove-shell	904	0755	edit dl rm
resize2fs	67968	0755	edit dl rm
rfkill	51432	0755	edit dl rm
rmmod	170352	0755	edit dl rm
rmt	59952	0755	edit dl rm
rmt-tar	59952	0755	edit dl rm
rtacct	49448	0755	edit dl rm
rtcwake	47336	0755	edit dl rm
rtmon	80120	0755	edit dl rm
runlevel	1119856	0755	edit dl rm
runuser	67816	0755	edit dl rm
service	9262	0755	edit dl rm
setcap	14648	0755	edit dl rm
sfdisk	141544	0755	edit dl rm
shadowconfig	885	0755	edit dl rm
shutdown	1119856	0755	edit dl rm
sshd	884520	0755	edit dl rm
start-stop-daemon	48456	0755	edit dl rm
sulogin	51432	0755	edit dl rm
swaplabel	18664	0755	edit dl rm
swapoff	22760	0755	edit dl rm
swapon	51432	0755	edit dl rm
switch_root	14568	0755	edit dl rm
sysctl	30960	0755	edit dl rm
tarcat	936	0755	edit dl rm
tc	542160	0755	edit dl rm
telinit	1119856	0755	edit dl rm
tipc	129264	0755	edit dl rm
tune2fs	109112	0755	edit dl rm
tzconfig	106	0755	edit dl rm
unix_chkpwd	43160	2755	edit dl rm
unix_update	43160	0755	edit dl rm
update-ca-certificates	5418	0755	edit dl rm
update-mime	9402	0755	edit dl rm
update-passwd	35392	0755	edit dl rm
update-rc.d	17161	0755	edit dl rm
useradd	147160	0755	edit dl rm
userdel	101264	0755	edit dl rm
usermod	142840	0755	edit dl rm
veritysetup	53064	0755	edit dl rm
vigr	70200	0755	edit dl rm
vipw	70200	0755	edit dl rm
visudo	223432	0755	edit dl rm
wipefs	47336	0755	edit dl rm
wpa_action	1735	0755	edit dl rm
wpa_cli	155872	0755	edit dl rm
wpa_supplicant	2901328	0755	edit dl rm
xtables-legacy-multi	99296	0755	edit dl rm
xtables-monitor	220488	0755	edit dl rm
xtables-nft-multi	220488	0755	edit dl rm
zic	63784	0755	edit dl rm
zramctl	117088	0755	edit dl rm

Edit: /snap/core20/2769/usr/sbin/e2scrub (7296B)

#!/bin/bash

#  Copyright (C) 2018 Oracle.  All Rights Reserved.
#
#  Author: Darrick J. Wong <darrick.wong@oracle.com>
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
#  of the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it would be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write the Free Software Foundation,
#  Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.

# Automatically check an LVM-managed filesystem online.
# We use lvm snapshots to do this, which means that we can only
# check filesystems in VGs that have at least 256MB (or so) of
# free space.

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

if (( $EUID != 0 )); then
    echo "e2scrub must be run as root"
    exit 1
fi

snap_size_mb=256
fstrim=0
reap=0
e2fsck_opts=""
conffile="/etc/e2scrub.conf"

test -f "${conffile}" && . "${conffile}"

print_help() {
	echo "Usage: $0 [OPTIONS] mountpoint | device"
	echo
	echo "mountpoint must be on an LVM-managed block device"
	echo "-n: Show what commands e2scrub would execute."
	echo "-r: Remove e2scrub snapshot and exit, do not check anything."
	echo "-t: Run fstrim if successful."
	echo "-V: Print version information and exit."
}

print_version() {
	echo "e2scrub 1.45.5 (07-Jan-2020)"
}

exitcode() {
	ret="$1"

# If we're being run as a service, the return code must fit the LSB
	# init script action error guidelines, which is to say that we
	# compress all errors to 1 ("generic or unspecified error", LSB 5.0
	# section 22.2) and hope the admin will scan the log for what
	# actually happened.

# We have to sleep 2 seconds here because journald uses the pid to
	# connect our log messages to the systemd service.  This is critical
	# for capturing all the log messages if the scrub fails, because the
	# fail service uses the service name to gather log messages for the
	# error report.
	if [ -n "${SERVICE_MODE}" -a "${ret}" -ne 0 ]; then
		test "${ret}" -ne 0 && ret=1
		sleep 2
	fi

exit "${ret}"
}

while getopts "nrtV" opt; do
    case "${opt}" in
	"n") DBG="echo Would execute: " ;;
	"r") reap=1;;
	"t") fstrim=1;;
	"V") print_version; exitcode 0;;
	*) print_help; exitcode 2;;
	esac
done
shift "$((OPTIND - 1))"

arg="$1"
if [ -z "${arg}" ]; then
	print_help
	exitcode 1
fi

if ! type lsblk >& /dev/null ; then
    echo "e2scrub: can't find lsblk --- is util-linux installed?"
    exitcode 1
fi

if ! type lvcreate >& /dev/null ; then
    echo "e2scrub: can't find lvcreate --- is lvm2 installed?"
    exitcode 1
fi

# close file descriptor 3 (from cron) since it causes lvm to kvetch
exec 3<&-

# Find the device for a given mountpoint
dev_from_mount() {
	local mountpt="$(realpath "$1")"

lsblk -o NAME,FSTYPE,MOUNTPOINT -p -P -n 2> /dev/null | while read vars; do
		eval "${vars}"
		if [ "${mountpt}" != "${MOUNTPOINT}" ]; then
			continue
		fi
		case "${FSTYPE}" in
		ext[234])
			echo "${NAME}"
			return 0
			;;
		esac
	done
	return 1
}

# Check a device argument
dev_from_arg() {
	local dev="$1"
	local fstype="$(lsblk -o FSTYPE -n "${dev}" 2> /dev/null)"

case "${fstype}" in
	ext[234])
		echo "${dev}"
		return 0
		;;
	esac
	return 1
}

mnt_from_dev() {
	local dev="$1"

if [ -n "${dev}" ]; then
		lsblk -o MOUNTPOINT -n "${dev}"
	fi
}

# Construct block device path and mountpoint from argument
if [ -b "${arg}" ]; then
	dev="$(dev_from_arg "${arg}")"
	mnt="$(mnt_from_dev "${dev}")"
else
	dev="$(dev_from_mount "${arg}")"
	mnt="${arg}"
fi
if [ ! -e "${dev}" ]; then
	echo "${arg}: Not an ext[234] filesystem."
	print_help
	exitcode 16
fi

# Make sure this is an LVM device we can snapshot
lvm_vars="$(lvs --nameprefixes -o name,vgname,lv_role --noheadings "${dev}" 2> /dev/null)"
eval "${lvm_vars}"
if [ -z "${LVM2_VG_NAME}" ] || [ -z "${LVM2_LV_NAME}" ] ||
   echo "${LVM2_LV_ROLE}" | grep -q "snapshot"; then
	echo "${arg}: Not connnected to an LVM logical volume."
	print_help
	exitcode 16
fi
start_time="$(date +'%Y%m%d%H%M%S')"
snap="${LVM2_LV_NAME}.e2scrub"
snap_dev="/dev/${LVM2_VG_NAME}/${snap}"

teardown() {
	# Remove and wait for removal to succeed.
	${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}"
	while [ -e "${snap_dev}" ] && [ "$?" -eq "5" ]; do
		sleep 0.5
		${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}"
	done
}

check() {
	# First we recover the journal, then we see if e2fsck tries any
	# non-optimization repairs.  If either of these two returns a
	# non-zero status (errors fixed or remaining) then this fs is bad.
	E2FSCK_FIXES_ONLY=1
	export E2FSCK_FIXES_ONLY
	${DBG} "/sbin/e2fsck" -E journal_only -p ${e2fsck_opts} "${snap_dev}" || return $?
	${DBG} "/sbin/e2fsck" -f -y ${e2fsck_opts} "${snap_dev}"
}

mark_clean() {
	${DBG} "/sbin/tune2fs" -C 0 -T "${start_time}" "${dev}"
}

mark_corrupt() {
	${DBG} "/sbin/tune2fs" -E force_fsck "${dev}"
}

setup() {
	# Try to remove snapshot for 30s, bail out if we can't remove it.
	lvremove_deadline="$(( $(date "+%s") + 30))"
	${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}" 2>/dev/null
	while [ -e "${snap_dev}" ] && [ "$?" -eq "5" ] &&
	      [ "$(date "+%s")" -lt "${lvremove_deadline}" ]; do
		sleep 0.5
		${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}"
	done
	if [ -e "${snap_dev}" ]; then
		echo "${arg}: e2scrub snapshot is in use, cannot check!"
		return 1
	fi
	# Create the snapshot, wait for device to appear.
	${DBG} lvcreate -s -L "${snap_size_mb}m" -n "${snap}" "${LVM2_VG_NAME}/${LVM2_LV_NAME}"
	if [ $? -ne 0 ]; then
		echo "${arg}: e2scrub snapshot FAILED, will not check!"
		return 1
	fi
	${DBG} udevadm settle 2> /dev/null
	return 0
}

if [ "${reap}" -gt 0 ]; then
	if [ -e "${snap_dev}" ]; then
		teardown 2> /dev/null
	fi
	exit 0
fi
if ! setup; then
	exitcode 8
fi
trap "teardown; exit 1" EXIT INT QUIT TERM

# Check and react
check
case "$?" in
"0")
	# Clean check!
	echo "${arg}: Scrub succeeded."
	mark_clean
	teardown
	trap '' EXIT

# Trim the free space, which requires the snapshot be deleted.
	if [ "${fstrim}" -eq 1 ] && [ -d "${mnt}" ] && type fstrim > /dev/null 2>&1; then
		echo "${arg}: Trimming free space."
		fstrim -v "${mnt}"
	fi

ret=0
	;;
"8")
	# Operational error, what now?
	echo "${arg}: e2fsck operational error."
	teardown
	trap '' EXIT
	ret=8
	;;
*)
	# fsck failed.  Check if the snapshot is invalid; if so, make a
	# note of that at the end of the log.  This isn't necessarily a
	# failure because the mounted fs could have overflowed the
	# snapshot with regular disk writes /or/ our repair process
	# could have done it by repairing too much.
	#
	# If it's really corrupt we ought to fsck at next boot.
	is_invalid="$(lvs -o lv_snapshot_invalid --noheadings "${snap_dev}" | awk '{print $1}')"
	if [ -n "${is_invalid}" ]; then
		echo "${arg}: Scrub FAILED due to invalid snapshot."
		ret=8
	else
		echo "${arg}: Scrub FAILED due to corruption!  Unmount and run e2fsck -y."
		mark_corrupt
		ret=6
	fi
	teardown
	trap '' EXIT
	;;
esac

exitcode "${ret}"

cmd: