FM / sbin

/snap/core18/3084/sbin

Name	Size	Mode	Actions
agetty	56552	0755	edit dl rm
apparmor_parser	1480432	0755	edit dl rm
badblocks	26632	0755	edit dl rm
blkdeactivate	14840	0755	edit dl rm
blkdiscard	26704	0755	edit dl rm
blkid	88176	0755	edit dl rm
blockdev	38984	0755	edit dl rm
bridge	88224	0755	edit dl rm
cfdisk	96704	0755	edit dl rm
chcpu	22600	0755	edit dl rm
ctrlaltdel	18504	0755	edit dl rm
debugfs	222688	0755	edit dl rm
depmod	174424	0755	edit dl rm
devlink	80040	0755	edit dl rm
dhclient	500144	0755	edit dl rm
dhclient-script	15617	0755	edit dl rm
dmsetup	162616	0755	edit dl rm
dmstats	162616	0755	edit dl rm
dosfsck	59472	0755	edit dl rm
dosfslabel	55376	0755	edit dl rm
dumpe2fs	26704	0755	edit dl rm
e2fsck	314080	0755	edit dl rm
e2image	34896	0755	edit dl rm
e2label	104704	0755	edit dl rm
e2undo	18504	0755	edit dl rm
fatlabel	55376	0755	edit dl rm
fdisk	125056	0755	edit dl rm
findfs	10312	0755	edit dl rm
fsck	47232	0755	edit dl rm
fsck.cramfs	34928	0755	edit dl rm
fsck.ext2	314080	0755	edit dl rm
fsck.ext3	314080	0755	edit dl rm
fsck.ext4	314080	0755	edit dl rm
fsck.fat	59472	0755	edit dl rm
fsck.minix	92264	0755	edit dl rm
fsck.msdos	59472	0755	edit dl rm
fsck.vfat	59472	0755	edit dl rm
fsfreeze	10312	0755	edit dl rm
fstab-decode	6136	0755	edit dl rm
fstrim	43088	0755	edit dl rm
getty	56552	0755	edit dl rm
halt	996584	0755	edit dl rm
hwclock	59584	0755	edit dl rm
init	1620224	0755	edit dl rm
insmod	174424	0755	edit dl rm
installkernel	2638	0755	edit dl rm
ip	611960	0755	edit dl rm
ip6tables	94968	0755	edit dl rm
ip6tables-restore	94968	0755	edit dl rm
ip6tables-save	94968	0755	edit dl rm
iptables	94968	0755	edit dl rm
iptables-restore	94968	0755	edit dl rm
iptables-save	94968	0755	edit dl rm
isosize	22608	0755	edit dl rm
killall5	22608	0755	edit dl rm
ldconfig	387	0755	edit dl rm
ldconfig.real	1025712	0755	edit dl rm
logsave	10240	0755	edit dl rm
losetup	84160	0755	edit dl rm
lsmod	174424	0755	edit dl rm
mkdosfs	35328	0755	edit dl rm
mke2fs	129344	0755	edit dl rm
mkfs	10312	0755	edit dl rm
mkfs.bfs	30800	0755	edit dl rm
mkfs.cramfs	34824	0755	edit dl rm
mkfs.ext2	129344	0755	edit dl rm
mkfs.ext3	129344	0755	edit dl rm
mkfs.ext4	129344	0755	edit dl rm
mkfs.fat	35328	0755	edit dl rm
mkfs.minix	79960	0755	edit dl rm
mkfs.msdos	35328	0755	edit dl rm
mkfs.vfat	35328	0755	edit dl rm
mkhomedir_helper	18448	0755	edit dl rm
mkswap	79952	0755	edit dl rm
modinfo	174424	0755	edit dl rm
modprobe	174424	0755	edit dl rm
pam_extrausers_chkpwd	34816	2755	edit dl rm
pam_extrausers_update	34816	0755	edit dl rm
pam_tally	10248	0755	edit dl rm
pam_tally2	14344	0755	edit dl rm
pivot_root	10312	0755	edit dl rm
poweroff	996584	0755	edit dl rm
raw	14408	0755	edit dl rm
reboot	996584	0755	edit dl rm
resize2fs	59464	0755	edit dl rm
rmmod	174424	0755	edit dl rm
rtacct	41096	0755	edit dl rm
rtmon	51200	0755	edit dl rm
runlevel	996584	0755	edit dl rm
runuser	43080	0755	edit dl rm
sfdisk	108624	0755	edit dl rm
shadowconfig	885	0755	edit dl rm
shutdown	996584	0755	edit dl rm
start-stop-daemon	35944	0755	edit dl rm
sulogin	47184	0755	edit dl rm
swaplabel	14408	0755	edit dl rm
swapoff	18504	0755	edit dl rm
swapon	47184	0755	edit dl rm
switch_root	14408	0755	edit dl rm
sysctl	22600	0755	edit dl rm
tc	464680	0755	edit dl rm
telinit	996584	0755	edit dl rm
tipc	55288	0755	edit dl rm
tune2fs	104704	0755	edit dl rm
udevadm	953552	0755	edit dl rm
unix_chkpwd	34816	2755	edit dl rm
unix_update	34816	0755	edit dl rm
wipefs	38992	0755	edit dl rm
wpa_action	1735	0755	edit dl rm
wpa_cli	139000	0755	edit dl rm
wpa_supplicant	2265104	0755	edit dl rm
xtables-multi	94968	0755	edit dl rm
zramctl	92352	0755	edit dl rm

Edit: /snap/core18/3084/sbin/blkdeactivate (14840B)

#!/bin/bash
#
# Copyright (C) 2012-2017 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Author: Peter Rajnoha <prajnoha at redhat.com>
#
# Script for deactivating block devices
#
# Requires:
#   bash >= 4.0 (associative array support)
#   util-linux {
#       lsblk >= 2.22 (lsblk -s support)
#       umount
#   }
#   dmsetup >= 1.02.68 (--retry option support)
#   lvm >= 2.2.89 (activation/retry_deactivation config support)
#

#set -x
shopt -s dotglob nullglob

TOOL=blkdeactivate

sbindir="/sbin"

DEV_DIR="/dev"
SYS_BLK_DIR="/sys/block"

MOUNTPOINT="/bin/mountpoint"
UMOUNT="/bin/umount"
DMSETUP="$sbindir/dmsetup"
LVM="$sbindir/lvm"
MDADM="$sbindir/mdadm"
MPATHD="/sbin/multipathd"

if "$UMOUNT" --help | grep -- "--all-targets" >"$DEV_DIR/null"; then
	UMOUNT_OPTS="--all-targets "
else
	UMOUNT_OPTS=""
	FINDMNT="/bin/findmnt -r --noheadings -u -o TARGET"
	FINDMNT_READ="read -r mnt"
fi
DMSETUP_OPTS=""
LVM_OPTS=""
MDADM_OPTS=""
MPATHD_OPTS=""

LSBLK="/bin/lsblk -r --noheadings -o TYPE,KNAME,NAME,MOUNTPOINT"
LSBLK_VARS="local devtype local kname local name local mnt"
LSBLK_READ="read -r devtype kname name mnt"
SORT_MNT="/usr/bin/sort -r -u -k 4"

# Do not show tool errors by default (only done/skipping summary
# message provided by this script) and no verbose mode by default.
ERRORS=0
VERBOSE=0

# Do not unmount mounted devices by default.
DO_UMOUNT=0

# Deactivate each LV separately by default (not the whole VG).
LVM_DO_WHOLE_VG=0
# Do not retry LV deactivation by default.
LVM_CONFIG="activation{retry_deactivation=0}"

# Do not wait for MD RAID device resync, recovery or reshape.
MDRAID_DO_WAIT=0

# Do not disable queueing if set on multipath devices.
MPATHD_DO_DISABLEQUEUEING=0

#
# List of device names and/or VGs to be skipped.
# Device name is the KNAME from lsblk output.
#
# If deactivation of any device fails, it's automatically
# added to the SKIP_DEVICE_LIST (also a particular VG
# added to the SKIP_VG_LIST for a device that is an LV).
#
# These lists provide device tree pruning to skip
# particular device/VG deactivation that failed already.
# (lists are associative arrays!)
#
declare -A SKIP_DEVICE_LIST=()
declare -A SKIP_VG_LIST=()

#
# List of mountpoints to be skipped. Any device that is mounted on the mountpoint
# listed here will be added to SKIP_DEVICE_LIST (and SKIP_VG_LIST) automatically.
# (list is an associative array!)
#
declare -A SKIP_UMOUNT_LIST=(["/"]=1 \
                             ["/lib"]=1 ["/lib64"]=1 \
                             ["/bin"]=1 ["/sbin"]=1 \
                             ["/var"]=1 ["/var/log"]=1 \
                             ["/usr"]=1 \
                             ["/usr/lib"]=1 ["/usr/lib64"]=1 \
                             ["/usr/sbin"]=1 ["/usr/bin"]=1)
# Bash can't properly handle '[' and ']' used as a subscript
# within the '()'initialization - it needs to be done separately!
SKIP_UMOUNT_LIST["[SWAP]"]=1

usage() {
	echo "${TOOL}: Utility to deactivate block devices"
	echo
	echo "  ${TOOL} [options] [device...]"
	echo "    - Deactivate block device tree."
	echo "      If devices are specified, deactivate only supplied devices and their holders."
	echo
	echo "  Options:"
	echo "    -e | --errors                       Show errors reported from tools"
	echo "    -h | --help                         Show this help message"
	echo "    -d | --dmoptions     DM_OPTIONS     Comma separated DM specific options"
	echo "    -l | --lvmoptions    LVM_OPTIONS    Comma separated LVM specific options"
	echo "    -m | --mpathoptions  MPATH_OPTIONS  Comma separated DM-multipath specific options"
	echo "    -r | --mdraidoptions MDRAID_OPTIONS Comma separated MD RAID specific options"
	echo "    -u | --umount                       Unmount the device if mounted"
	echo "    -v | --verbose                      Verbose mode (also implies -e)"
	echo
	echo "  Device specific options:"
	echo "    DM_OPTIONS:"
	echo "      retry           retry removal several times in case of failure"
	echo "      force           force device removal"
	echo "    LVM_OPTIONS:"
	echo "      retry           retry removal several times in case of failure"
	echo "      wholevg         deactivate the whole VG when processing an LV"
	echo "    MDRAID_OPTIONS:"
	echo "      wait            wait for resync, recovery or reshape to complete first"
	echo "    MPATH_OPTIONS:"
	echo "      disablequeueing disable queueing on all DM-multipath devices first"

exit
}

add_device_to_skip_list() {
	SKIP_DEVICE_LIST+=(["$kname"]=1)
	return 1
}

add_vg_to_skip_list() {
	SKIP_VG_LIST+=(["$DM_VG_NAME"]=1)
	return 1
}

is_top_level_device() {
	# top level devices do not have any holders, that is
	# the SYS_BLK_DIR/<device_name>/holders dir is empty
	files=$(echo "$SYS_BLK_DIR/$kname/holders/"*)
	test -z "$files"
}

device_umount_one() {
	test -z "$mnt" && return 0

if test -z "${SKIP_UMOUNT_LIST["$mnt"]}" -a "$DO_UMOUNT" -eq "1"; then
		echo -n "  [UMOUNT]: unmounting $name ($kname) mounted on $mnt... "
		if eval "$UMOUNT" $UMOUNT_OPTS "$(printf "%s" "$mnt")" "$OUT" "$ERR"; then
			echo "done"
		elif "$MOUNTPOINT" -q "$mnt"; then
			echo "skipping"
			add_device_to_skip_list
		else
			echo "already unmounted"
		fi
	else
		echo "  [SKIP]: unmount of $name ($kname) mounted on $mnt"
		add_device_to_skip_list
	fi
}

device_umount() {
	test "$devtype" != "lvm" && test "${kname:0:3}" != "dm-" \
          && test "${kname:0:2}" != "md" && return 0

# FINDMNT is defined only if umount --all-targets is not available.
	# In that case, read the list of multiple mount points of one device
	# using FINDMNT and unmount it one by one manually.
	if test -z "$FINDMNT"; then
		device_umount_one
	else
		while $FINDMNT_READ; do
			device_umount_one || return 1
		done <<< "$($FINDMNT "$DEV_DIR/$kname")"
	fi

}

deactivate_holders () {
	local skip=1; $LSBLK_VARS

# Get holders for the device - either a mount or another device.
	# First line on the lsblk output is the device itself - skip it for
	# the deactivate call as this device is already being deactivated.
	while $LSBLK_READ; do
		test -e "$SYS_BLK_DIR/$kname" || continue
		# check if the device not on the skip list already
		test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1

# try to deactivate the holder
		test "$skip" -eq 1 && skip=0 && continue
		deactivate || return 1
	done <<< "$($LSBLK "$1")"
}

deactivate_dm () {
	local xname
	xname=$(printf "%s" "$name")
	test -b "$DEV_DIR/mapper/$xname" || return 0
	test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1

deactivate_holders "$DEV_DIR/mapper/$xname" || return 1

echo -n "  [DM]: deactivating $devtype device $xname ($kname)... "
	if eval "$DMSETUP" $DMSETUP_OPTS remove "$xname" "$OUT" "$ERR"; then
		echo "done"
	else
		echo "skipping"
		add_device_to_skip_list
	fi
}

deactivate_lvm () {
	local DM_VG_NAME; local DM_LV_NAME

eval "$(eval "$DMSETUP" splitname --nameprefixes --noheadings --rows "$name" LVM "$ERR")"
	test -b "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || return 0
	test -z "${SKIP_VG_LIST["$DM_VG_NAME"]}" || return 1

if test "$LVM_DO_WHOLE_VG" -eq 0; then
		# Skip LVM device deactivation if LVM tools missing.
		test "$LVM_AVAILABLE" -eq 0 && {
			add_device_to_skip_list
			return 1
		}
		# Deactivating only the LV specified
		deactivate_holders "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || {
			add_device_to_skip_list
			return 1
		}

echo -n "  [LVM]: deactivating Logical Volume $DM_VG_NAME/$DM_LV_NAME... "
		if eval "$LVM" lvchange $LVM_OPTS --config \'log\{prefix=\"\"\} $LVM_CONFIG\' -aln "$DM_VG_NAME/$DM_LV_NAME" "$OUT" "$ERR"; then
			echo "done"
		else
			echo "skipping"
			add_device_to_skip_list
		fi

else
		# Skip LVM VG deactivation if LVM tools missing.
		test "$LVM_AVAILABLE" -eq 0 && {
			add_vg_to_skip_list
			return 1
		}
		# Deactivating the whole VG the LV is part of
		lv_list=$(eval "$LVM" vgs --config "$LVM_CONFIG" --noheadings --rows -o lv_name "$DM_VG_NAME" "$ERR")
		for lv in $lv_list; do
			test -b "$DEV_DIR/$DM_VG_NAME/$lv" || continue
			deactivate_holders "$DEV_DIR/$DM_VG_NAME/$lv" || {
				add_vg_to_skip_list
				return 1
			}
		done

echo -n "  [LVM]: deactivating Volume Group $DM_VG_NAME... "
		if eval "$LVM" vgchange $LVM_OPTS --config \'log\{prefix=\"    \"\} $LVM_CONFIG\' -aln "$DM_VG_NAME" "$OUT" "$ERR"; then
			echo "done"
		else
			echo "skipping"
			add_vg_to_skip_list
		fi
	fi
}

deactivate_md () {
	local xname
	xname=$(printf "%s" "$name")
	local sync_action
	test -b "$DEV_DIR/$xname" || return 0
	test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1

# Skip MD device deactivation if MD tools missing.
	test "$MDADM_AVAILABLE" -eq 0 && {
		add_device_to_skip_list
		return 1
	}

deactivate_holders "$DEV_DIR/$xname" || return 1

echo -n "  [MD]: deactivating $devtype device $kname... "

test "$MDRAID_DO_WAIT" -eq 1 && {
		sync_action=$(cat "$SYS_BLK_DIR/$kname/md/sync_action")
		test "$sync_action" != "idle" && {
			echo -n "$sync_action action in progress... "
			if eval "$MDADM" $MDADM_OPTS -W "$DEV_DIR/$kname" "$OUT" "$ERR"; then
				echo -n "complete... "
			else
				test $? -ne 1 && echo -n "failed to wait for $sync_action action... "
			fi
		}
	}

if eval "$MDADM" $MDADM_OPTS -S "$xname" "$OUT" "$ERR"; then
		echo "done"
	else
		echo "skipping"
		add_device_to_skip_list
	fi
}

deactivate () {
	######################################################################
	# DEACTIVATION HOOKS FOR NEW DEVICE TYPES GO HERE!                   #
	#                                                                    #
	# Identify a new device type either by inspecting the TYPE provided  #
	# by lsblk directly ($devtype) or by any other mean that is suitable #
	# e.g. the KNAME provided by lsblk ($kname). See $LSBLK_VARS for     #
	# complete list of variables that may be used. Then call a           #
	# device-specific deactivation function that handles the exact type. #
	#                                                                    #
        # This device-specific function will certainly need to call          #
	# deactivate_holders first to recursively deactivate any existing    #
	# holders it might have before deactivating the device it processes. #
	######################################################################
	if test "$devtype" = "lvm"; then
		deactivate_lvm
	elif test "${kname:0:3}" = "dm-"; then
		deactivate_dm
	elif test "${kname:0:2}" = "md"; then
		deactivate_md
	fi
}

deactivate_all() {
	$LSBLK_VARS
	skip=0

echo "Deactivating block devices:"

test "$MPATHD_RUNNING" -eq 1 && {
		echo -n "  [DM]: disabling queueing on all multipath devices... "
		eval "$MPATHD" $MPATHD_OPTS disablequeueing maps "$ERR" | grep '^ok$' >"$DEV_DIR/null" && echo "done" || echo "failed"
	}

if test $# -eq 0; then
		#######################
		# Process all devices #
		#######################

# Unmount all relevant mountpoints first
		while $LSBLK_READ; do
			device_umount
		done <<< "$($LSBLK | $SORT_MNT)"

# Do deactivate
		while $LSBLK_READ; do
			# 'disk' is at the bottom already and it's a real device
			test "$devtype" = "disk" && continue

# if deactivation of any device fails, skip processing
			# any subsequent devices within its subtree as the
			# top-level device could not be deactivated anyway
			test "$skip" -eq 1 && {
				# reset 'skip' on top level device
				if is_top_level_device ; then
					skip=0
				else
					continue
				fi
			}

# check if the device is not on the skip list already
			test -z "${SKIP_DEVICE_LIST["$kname"]}" || continue

# try to deactivate top-level device, set 'skip=1'
			# if it fails to do so - this will cause all the
			# device's subtree to be skipped when processing
			# devices further in this loop
			deactivate || skip=1
		done <<< "$($LSBLK -s)"
	else
		##################################
		# Process only specified devices #
		##################################

while test $# -ne 0; do
			# Unmount all relevant mountpoints first
			while $LSBLK_READ; do
				device_umount
			done <<< "$($LSBLK "$1" | $SORT_MNT)"

# Do deactivate
			# Single dm device tree deactivation.
			if test -b "$1"; then
				$LSBLK_READ <<< "$($LSBLK --nodeps "$1")"

# check if the device is not on the skip list already
				test -z "${SKIP_DEVICE_LIST["$kname"]}" || {
					shift
					continue
				}

deactivate
			else
				echo "$1: device not found"
				return 1
			fi
			shift
		done;
	fi
}

get_dmopts() {
	ORIG_IFS=$IFS; IFS=','

for opt in $1; do
		case $opt in
			"") ;;
			"retry") DMSETUP_OPTS+="--retry " ;;
			"force") DMSETUP_OPTS+="--force " ;;
			*) echo "$opt: unknown DM option"
		esac
	done

IFS=$ORIG_IFS
}

get_lvmopts() {
	ORIG_IFS=$IFS; IFS=','

for opt in $1; do
		case "$opt" in
			"") ;;
			"retry") LVM_CONFIG="activation{retry_deactivation=1}" ;;
			"wholevg") LVM_DO_WHOLE_VG=1 ;;
			*) echo "$opt: unknown LVM option"
		esac
	done

IFS=$ORIG_IFS
}

get_mdraidopts() {
	ORIG_IFS=$IFS; IFS=','

for opt in $1; do
		case "$opt" in
			"") ;;
			"wait") MDRAID_DO_WAIT=1 ;;
			*) echo "$opt: unknown MD RAID option"
		esac
	done

IFS=$ORIG_IFS
}

get_mpathopts() {
	ORIG_IFS=$IFS; IFS=','

for opt in $1; do
		case "$opt" in
			"") ;;
			"disablequeueing") MPATHD_DO_DISABLEQUEUEING=1 ;;
			*) echo "$opt: unknown DM-multipath option"
		esac
	done

IFS=$ORIG_IFS
}

set_env() {
	if test "$ERRORS" -eq "1"; then
		unset ERR
	else
		ERR="2>$DEV_DIR/null"
	fi

if test "$VERBOSE" -eq "1"; then
		unset OUT
		UMOUNT_OPTS+="-v"
		DMSETUP_OPTS+="-vvvv"
		LVM_OPTS+="-vvvv"
		MDADM_OPTS+="-vv"
		MPATHD_OPTS+="-v 3"
	else
		OUT="1>$DEV_DIR/null"
	fi

if test -f "$LVM"; then
		LVM_AVAILABLE=1
	else
		LVM_AVAILABLE=0
	fi

if test -f $MDADM; then
		MDADM_AVAILABLE=1
	else
		MDADM_AVAILABLE=0
	fi

MPATHD_RUNNING=0
	test "$MPATHD_DO_DISABLEQUEUEING" -eq 1 && {
		if test -f "$MPATHD"; then
			if eval "$MPATHD" show daemon "$ERR" | grep "running" >"$DEV_DIR/null"; then
				MPATHD_RUNNING=1
			fi
		fi
	}
}

while test $# -ne 0; do
	case "$1" in
		"") ;;
		"-e"|"--errors") ERRORS=1 ;;
		"-h"|"--help") usage ;;
		"-d"|"--dmoptions") get_dmopts "$2" ; shift ;;
		"-l"|"--lvmoptions") get_lvmopts "$2" ; shift ;;
		"-m"|"--mpathoptions") get_mpathopts "$2" ; shift ;;
		"-r"|"--mdraidoptions") get_mdraidopts "$2"; shift ;;
		"-u"|"--umount") DO_UMOUNT=1 ;;
		"-v"|"--verbose") VERBOSE=1 ; ERRORS=1 ;;
		"-vv") VERBOSE=1 ; ERRORS=1 ; set -x ;;
		*) break ;;
	esac
	shift
done

set_env
deactivate_all "$@"

cmd: