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contrib/initramfs: fix shellcheck and checkbashisms errors with shebang 

Reviewed-by: Gabriel A. Devenyi <gdevenyi@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #10908
Closes #10917
This commit is contained in:
наб 2020-09-23 01:10:09 +02:00 committed by Brian Behlendorf
parent e651a5b233
commit b9d18bdbdc
1 changed files with 80 additions and 87 deletions
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163
contrib/initramfs/scripts/zfs
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@ -15,8 +15,8 @@
# See "4.5 Disable root prompt on the initramfs" of Securing Debian Manual: # See "4.5 Disable root prompt on the initramfs" of Securing Debian Manual:
# https://www.debian.org/doc/manuals/securing-debian-howto/ch4.en.html # https://www.debian.org/doc/manuals/securing-debian-howto/ch4.en.html
shell() { shell() {
if type panic > /dev/null 2>&1; then if command -v panic > /dev/null 2>&1; then
panic $@ panic
else else
/bin/sh /bin/sh
fi fi
@ -26,22 +26,23 @@ shell() {
# pools and mounting any filesystems. # pools and mounting any filesystems.
pre_mountroot() pre_mountroot()
{ {
if type run_scripts > /dev/null 2>&1 && \ if command -v run_scripts > /dev/null 2>&1
[ -f "/scripts/local-top" -o -d "/scripts/local-top" ]
then then
[ "$quiet" != "y" ] && \ if [ -f "/scripts/local-top" ] || [ -d "/scripts/local-top" ]
zfs_log_begin_msg "Running /scripts/local-top" then
run_scripts /scripts/local-top [ "$quiet" != "y" ] && \
[ "$quiet" != "y" ] && zfs_log_end_msg zfs_log_begin_msg "Running /scripts/local-top"
fi run_scripts /scripts/local-top
[ "$quiet" != "y" ] && zfs_log_end_msg
fi
if type run_scripts > /dev/null 2>&1 && \ if [ -f "/scripts/local-premount" ] || [ -d "/scripts/local-premount" ]
[ -f "/scripts/local-premount" -o -d "/scripts/local-premount" ] then
then [ "$quiet" != "y" ] && \
[ "$quiet" != "y" ] && \ zfs_log_begin_msg "Running /scripts/local-premount"
zfs_log_begin_msg "Running /scripts/local-premount" run_scripts /scripts/local-premount
run_scripts /scripts/local-premount [ "$quiet" != "y" ] && zfs_log_end_msg
[ "$quiet" != "y" ] && zfs_log_end_msg fi
fi fi
} }
@ -57,10 +58,10 @@ disable_plymouth()
# Get a ZFS filesystem property value. # Get a ZFS filesystem property value.
get_fs_value() get_fs_value()
{ {
local fs="$1" fs="$1"
local value=$2 value=$2
"${ZFS}" get -H -ovalue $value "$fs" 2> /dev/null "${ZFS}" get -H -ovalue "$value" "$fs" 2> /dev/null
} }
# Find the 'bootfs' property on pool $1. # Find the 'bootfs' property on pool $1.
@ -68,7 +69,7 @@ get_fs_value()
# pool by exporting it again. # pool by exporting it again.
find_rootfs() find_rootfs()
{ {
local pool="$1" pool="$1"
# If 'POOL_IMPORTED' isn't set, no pool imported and therefore # If 'POOL_IMPORTED' isn't set, no pool imported and therefore
# we won't be able to find a root fs. # we won't be able to find a root fs.
@ -84,7 +85,7 @@ find_rootfs()
# Make sure it's not '-' and that it starts with /. # Make sure it's not '-' and that it starts with /.
if [ "${ZFS_BOOTFS}" != "-" ] && \ if [ "${ZFS_BOOTFS}" != "-" ] && \
$(get_fs_value "${ZFS_BOOTFS}" mountpoint | grep -q '^/$') get_fs_value "${ZFS_BOOTFS}" mountpoint | grep -q '^/$'
then then
# Keep it mounted # Keep it mounted
POOL_IMPORTED=1 POOL_IMPORTED=1
@ -101,14 +102,13 @@ find_rootfs()
# Support function to get a list of all pools, separated with ';' # Support function to get a list of all pools, separated with ';'
find_pools() find_pools()
{ {
local CMD="$*" CMD="$*"
local pools pool
pools=$($CMD 2> /dev/null | \ pools=$($CMD 2> /dev/null | \
grep -E "pool:|^[a-zA-Z0-9]" | \ grep -E "pool:|^[a-zA-Z0-9]" | \
sed 's@.*: @@' | \ sed 's@.*: @@' | \
while read pool; do \ while read -r pool; do \
echo -n "$pool;" printf "%s" "$pool;"
done) done)
echo "${pools%%;}" # Return without the last ';'. echo "${pools%%;}" # Return without the last ';'.
@ -117,8 +117,6 @@ find_pools()
# Get a list of all available pools # Get a list of all available pools
get_pools() get_pools()
{ {
local available_pools npools
if [ -n "${ZFS_POOL_IMPORT}" ]; then if [ -n "${ZFS_POOL_IMPORT}" ]; then
echo "$ZFS_POOL_IMPORT" echo "$ZFS_POOL_IMPORT"
return 0 return 0
@ -159,9 +157,8 @@ get_pools()
# Filter out any exceptions... # Filter out any exceptions...
if [ -n "$ZFS_POOL_EXCEPTIONS" ] if [ -n "$ZFS_POOL_EXCEPTIONS" ]
then then
local found="" found=""
local apools="" apools=""
local pool exception
OLD_IFS="$IFS" ; IFS=";" OLD_IFS="$IFS" ; IFS=";"
for pool in $available_pools for pool in $available_pools
@ -194,8 +191,7 @@ get_pools()
# Import given pool $1 # Import given pool $1
import_pool() import_pool()
{ {
local pool="$1" pool="$1"
local dirs dir
# Verify that the pool isn't already imported # Verify that the pool isn't already imported
# Make as sure as we can to not require '-f' to import. # Make as sure as we can to not require '-f' to import.
@ -205,7 +201,7 @@ import_pool()
# to something we can use later with the real import(s). We want to # to something we can use later with the real import(s). We want to
# make sure we find all by* dirs, BUT by-vdev should be first (if it # make sure we find all by* dirs, BUT by-vdev should be first (if it
# exists). # exists).
if [ -n "$USE_DISK_BY_ID" -a -z "$ZPOOL_IMPORT_PATH" ] if [ -n "$USE_DISK_BY_ID" ] && [ -z "$ZPOOL_IMPORT_PATH" ]
then then
dirs="$(for dir in $(echo /dev/disk/by-*) dirs="$(for dir in $(echo /dev/disk/by-*)
do do
@ -213,7 +209,7 @@ import_pool()
echo "$dir" | grep -q /by-vdev && continue echo "$dir" | grep -q /by-vdev && continue
[ ! -d "$dir" ] && continue [ ! -d "$dir" ] && continue
echo -n "$dir:" printf "%s" "$dir:"
done | sed 's,:$,,g')" done | sed 's,:$,,g')"
if [ -d "/dev/disk/by-vdev" ] if [ -d "/dev/disk/by-vdev" ]
@ -277,7 +273,7 @@ import_pool()
# with more logging etc. # with more logging etc.
load_module_initrd() load_module_initrd()
{ {
if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" > 0 ] if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" -gt 0 ] 2>/dev/null
then then
if [ "$quiet" != "y" ]; then if [ "$quiet" != "y" ]; then
zfs_log_begin_msg "Sleeping for" \ zfs_log_begin_msg "Sleeping for" \
@ -288,9 +284,9 @@ load_module_initrd()
fi fi
# Wait for all of the /dev/{hd,sd}[a-z] device nodes to appear. # Wait for all of the /dev/{hd,sd}[a-z] device nodes to appear.
if type wait_for_udev > /dev/null 2>&1 ; then if command -v wait_for_udev > /dev/null 2>&1 ; then
wait_for_udev 10 wait_for_udev 10
elif type wait_for_dev > /dev/null 2>&1 ; then elif command -v wait_for_dev > /dev/null 2>&1 ; then
wait_for_dev wait_for_dev
fi fi
@ -300,7 +296,7 @@ load_module_initrd()
# Load the module # Load the module
load_module "zfs" || return 1 load_module "zfs" || return 1
if [ "$ZFS_INITRD_POST_MODPROBE_SLEEP" > 0 ] if [ "$ZFS_INITRD_POST_MODPROBE_SLEEP" -gt 0 ] 2>/dev/null
then then
if [ "$quiet" != "y" ]; then if [ "$quiet" != "y" ]; then
zfs_log_begin_msg "Sleeping for" \ zfs_log_begin_msg "Sleeping for" \
@ -316,12 +312,10 @@ load_module_initrd()
# Mount a given filesystem # Mount a given filesystem
mount_fs() mount_fs()
{ {
local fs="$1" fs="$1"
local mountpoint
# Check that the filesystem exists # Check that the filesystem exists
"${ZFS}" list -oname -tfilesystem -H "${fs}" > /dev/null 2>&1 "${ZFS}" list -oname -tfilesystem -H "${fs}" > /dev/null 2>&1 || return 1
[ "$?" -ne 0 ] && return 1
# Skip filesystems with canmount=off. The root fs should not have # Skip filesystems with canmount=off. The root fs should not have
# canmount=off, but ignore it for backwards compatibility just in case. # canmount=off, but ignore it for backwards compatibility just in case.
@ -333,14 +327,14 @@ mount_fs()
# Need the _original_ datasets mountpoint! # Need the _original_ datasets mountpoint!
mountpoint=$(get_fs_value "$fs" mountpoint) mountpoint=$(get_fs_value "$fs" mountpoint)
if [ "$mountpoint" = "legacy" -o "$mountpoint" = "none" ]; then if [ "$mountpoint" = "legacy" ] || [ "$mountpoint" = "none" ]; then
# Can't use the mountpoint property. Might be one of our # Can't use the mountpoint property. Might be one of our
# clones. Check the 'org.zol:mountpoint' property set in # clones. Check the 'org.zol:mountpoint' property set in
# clone_snap() if that's usable. # clone_snap() if that's usable.
mountpoint=$(get_fs_value "$fs" org.zol:mountpoint) mountpoint=$(get_fs_value "$fs" org.zol:mountpoint)
if [ "$mountpoint" = "legacy" -o \ if [ "$mountpoint" = "legacy" ] ||
"$mountpoint" = "none" -o \ [ "$mountpoint" = "none" ] ||
"$mountpoint" = "-" ] [ "$mountpoint" = "-" ]
then then
if [ "$fs" != "${ZFS_BOOTFS}" ]; then if [ "$fs" != "${ZFS_BOOTFS}" ]; then
# We don't have a proper mountpoint and this # We don't have a proper mountpoint and this
@ -396,10 +390,10 @@ mount_fs()
# Unlock a ZFS native encrypted filesystem. # Unlock a ZFS native encrypted filesystem.
decrypt_fs() decrypt_fs()
{ {
local fs="$1" fs="$1"
# If pool encryption is active and the zfs command understands '-o encryption' # If pool encryption is active and the zfs command understands '-o encryption'
if [ "$(zpool list -H -o feature@encryption $(echo "${fs}" | awk -F\/ '{print $1}'))" = 'active' ]; then if [ "$(zpool list -H -o feature@encryption "$(echo "${fs}" | awk -F/ '{print $1}')")" = 'active' ]; then
# Determine dataset that holds key for root dataset # Determine dataset that holds key for root dataset
ENCRYPTIONROOT="$(get_fs_value "${fs}" encryptionroot)" ENCRYPTIONROOT="$(get_fs_value "${fs}" encryptionroot)"
@ -454,7 +448,7 @@ decrypt_fs()
# Destroy a given filesystem. # Destroy a given filesystem.
destroy_fs() destroy_fs()
{ {
local fs="$1" fs="$1"
[ "$quiet" != "y" ] && \ [ "$quiet" != "y" ] && \
zfs_log_begin_msg "Destroying '$fs'" zfs_log_begin_msg "Destroying '$fs'"
@ -489,9 +483,9 @@ destroy_fs()
# mounted with a 'zfs mount -a' in the init/systemd scripts). # mounted with a 'zfs mount -a' in the init/systemd scripts).
clone_snap() clone_snap()
{ {
local snap="$1" snap="$1"
local destfs="$2" destfs="$2"
local mountpoint="$3" mountpoint="$3"
[ "$quiet" != "y" ] && zfs_log_begin_msg "Cloning '$snap' to '$destfs'" [ "$quiet" != "y" ] && zfs_log_begin_msg "Cloning '$snap' to '$destfs'"
@ -529,7 +523,7 @@ clone_snap()
# Rollback a given snapshot. # Rollback a given snapshot.
rollback_snap() rollback_snap()
{ {
local snap="$1" snap="$1"
[ "$quiet" != "y" ] && zfs_log_begin_msg "Rollback $snap" [ "$quiet" != "y" ] && zfs_log_begin_msg "Rollback $snap"
@ -559,9 +553,8 @@ rollback_snap()
# to the user to choose from. # to the user to choose from.
ask_user_snap() ask_user_snap()
{ {
local fs="$1" fs="$1"
local i=1 i=1
local SNAP snapnr snap debug
# We need to temporarily disable debugging. Set 'debug' so we # We need to temporarily disable debugging. Set 'debug' so we
# remember to enabled it again. # remember to enabled it again.
@ -574,16 +567,16 @@ ask_user_snap()
# Because we need the resulting snapshot, which is sent on # Because we need the resulting snapshot, which is sent on
# stdout to the caller, we use stderr for our questions. # stdout to the caller, we use stderr for our questions.
echo "What snapshot do you want to boot from?" > /dev/stderr echo "What snapshot do you want to boot from?" > /dev/stderr
while read snap; do while read -r snap; do
echo " $i: ${snap}" > /dev/stderr echo " $i: ${snap}" > /dev/stderr
eval `echo SNAP_$i=$snap` eval "$(echo SNAP_$i=$snap)"
i=$((i + 1)) i=$((i + 1))
done <<EOT done <<EOT
$("${ZFS}" list -H -oname -tsnapshot -r "${fs}") $("${ZFS}" list -H -oname -tsnapshot -r "${fs}")
EOT EOT
echo -n " Snap nr [1-$((i-1))]? " > /dev/stderr echo "%s" " Snap nr [1-$((i-1))]? " > /dev/stderr
read snapnr read -r snapnr
# Re-enable debugging. # Re-enable debugging.
if [ -n "${debug}" ]; then if [ -n "${debug}" ]; then
@ -591,16 +584,16 @@ EOT
set -x set -x
fi fi
echo "$(eval echo "$"SNAP_$snapnr)" echo "$(eval echo '$SNAP_'$snapnr)"
} }
setup_snapshot_booting() setup_snapshot_booting()
{ {
local snap="$1" snap="$1"
local s destfs subfs mountpoint retval=0 filesystems fs retval=0
# Make sure that the snapshot specified actually exist. # Make sure that the snapshot specified actually exists.
if [ ! $(get_fs_value "${snap}" type) ] if [ ! "$(get_fs_value "${snap}" type)" ]
then then
# Snapshot does not exist (...@<null> ?) # Snapshot does not exist (...@<null> ?)
# ask the user for a snapshot to use. # ask the user for a snapshot to use.
@ -617,7 +610,7 @@ setup_snapshot_booting()
then then
# If the destination dataset for the clone # If the destination dataset for the clone
# already exists, destroy it. Recursively # already exists, destroy it. Recursively
if [ $(get_fs_value "${rootfs}_${snapname}" type) ]; then if [ "$(get_fs_value "${rootfs}_${snapname}" type)" ]; then
filesystems=$("${ZFS}" list -oname -tfilesystem -H \ filesystems=$("${ZFS}" list -oname -tfilesystem -H \
-r -Sname "${ZFS_BOOTFS}") -r -Sname "${ZFS_BOOTFS}")
for fs in $filesystems; do for fs in $filesystems; do
@ -652,8 +645,8 @@ setup_snapshot_booting()
# with clone_snap(). If legacy or none, then use # with clone_snap(). If legacy or none, then use
# the sub fs value. # the sub fs value.
mountpoint=$(get_fs_value "${s%%@*}" mountpoint) mountpoint=$(get_fs_value "${s%%@*}" mountpoint)
if [ "$mountpoint" = "legacy" -o \ if [ "$mountpoint" = "legacy" ] || \
"$mountpoint" = "none" ] [ "$mountpoint" = "none" ]
then then
if [ -n "${subfs}" ]; then if [ -n "${subfs}" ]; then
mountpoint="${subfs}" mountpoint="${subfs}"
@ -678,8 +671,6 @@ setup_snapshot_booting()
# This is the main function. # This is the main function.
mountroot() mountroot()
{ {
local snaporig snapsub destfs pool POOLS
# ---------------------------------------------------------------- # ----------------------------------------------------------------
# I N I T I A L S E T U P # I N I T I A L S E T U P
@ -742,7 +733,7 @@ mountroot()
# No longer set in the defaults file, but it could have been set in # No longer set in the defaults file, but it could have been set in
# get_pools() in some circumstances. If it's something, but not 'yes', # get_pools() in some circumstances. If it's something, but not 'yes',
# it's no good to us. # it's no good to us.
[ -n "$USE_DISK_BY_ID" -a "$USE_DISK_BY_ID" != 'yes' ] && \ [ -n "$USE_DISK_BY_ID" ] && [ "$USE_DISK_BY_ID" != 'yes' ] && \
unset USE_DISK_BY_ID unset USE_DISK_BY_ID
# ---------------------------------------------------------------- # ----------------------------------------------------------------
@ -788,12 +779,12 @@ mountroot()
# ------------ # ------------
# If we have 'ROOT' (see above), but not 'ZFS_BOOTFS', then use # If we have 'ROOT' (see above), but not 'ZFS_BOOTFS', then use
# 'ROOT' # 'ROOT'
[ -n "$ROOT" -a -z "${ZFS_BOOTFS}" ] && ZFS_BOOTFS="$ROOT" [ -n "$ROOT" ] && [ -z "${ZFS_BOOTFS}" ] && ZFS_BOOTFS="$ROOT"
# ------------ # ------------
# Check for the `-B zfs-bootfs=%s/%u,...` kind of parameter. # Check for the `-B zfs-bootfs=%s/%u,...` kind of parameter.
# NOTE: Only use the pool name and dataset. The rest is not # NOTE: Only use the pool name and dataset. The rest is not
# supported by ZoL (whatever it's for). # supported by OpenZFS (whatever it's for).
if [ -z "$ZFS_RPOOL" ] if [ -z "$ZFS_RPOOL" ]
then then
# The ${zfs-bootfs} variable is set at the kernel command # The ${zfs-bootfs} variable is set at the kernel command
@ -809,11 +800,11 @@ mountroot()
# ------------ # ------------
# No root fs or pool specified - do auto detect. # No root fs or pool specified - do auto detect.
if [ -z "$ZFS_RPOOL" -a -z "${ZFS_BOOTFS}" ] if [ -z "$ZFS_RPOOL" ] && [ -z "${ZFS_BOOTFS}" ]
then then
# Do auto detect. Do this by 'cheating' - set 'root=zfs:AUTO' # Do auto detect. Do this by 'cheating' - set 'root=zfs:AUTO'
# which will be caught later # which will be caught later
ROOT=zfs:AUTO ROOT='zfs:AUTO'
fi fi
# ---------------------------------------------------------------- # ----------------------------------------------------------------
@ -858,7 +849,7 @@ mountroot()
fi fi
# Import the pool (if not already done so in the AUTO check above). # Import the pool (if not already done so in the AUTO check above).
if [ -n "$ZFS_RPOOL" -a -z "${POOL_IMPORTED}" ] if [ -n "$ZFS_RPOOL" ] && [ -z "${POOL_IMPORTED}" ]
then then
[ "$quiet" != "y" ] && \ [ "$quiet" != "y" ] && \
zfs_log_begin_msg "Importing ZFS root pool '$ZFS_RPOOL'" zfs_log_begin_msg "Importing ZFS root pool '$ZFS_RPOOL'"
@ -971,7 +962,7 @@ mountroot()
touch /run/zfs_unlock_complete touch /run/zfs_unlock_complete
if [ -e /run/zfs_unlock_complete_notify ]; then if [ -e /run/zfs_unlock_complete_notify ]; then
read zfs_unlock_complete_notify < /run/zfs_unlock_complete_notify read -r zfs_unlock_complete_notify < /run/zfs_unlock_complete_notify
fi fi
# ------------ # ------------
@ -989,8 +980,8 @@ mountroot()
echo echo
echo "=> waiting for ENTER before continuing because of 'zfsdebug=1'. " echo "=> waiting for ENTER before continuing because of 'zfsdebug=1'. "
echo -n " 'c' for shell, 'r' for reboot, 'ENTER' to continue. " printf "%s" " 'c' for shell, 'r' for reboot, 'ENTER' to continue. "
read b read -r b
[ "$b" = "c" ] && /bin/sh [ "$b" = "c" ] && /bin/sh
[ "$b" = "r" ] && reboot -f [ "$b" = "r" ] && reboot -f
@ -1000,12 +991,14 @@ mountroot()
# ------------ # ------------
# Run local bottom script # Run local bottom script
if type run_scripts > /dev/null 2>&1 && \ if command -v run_scripts > /dev/null 2>&1
[ -f "/scripts/local-bottom" -o -d "/scripts/local-bottom" ]
then then
[ "$quiet" != "y" ] && \ if [ -f "/scripts/local-bottom" ] || [ -d "/scripts/local-bottom" ]
zfs_log_begin_msg "Running /scripts/local-bottom" then
run_scripts /scripts/local-bottom [ "$quiet" != "y" ] && \
[ "$quiet" != "y" ] && zfs_log_end_msg zfs_log_begin_msg "Running /scripts/local-bottom"
run_scripts /scripts/local-bottom
[ "$quiet" != "y" ] && zfs_log_end_msg
fi
fi fi
} }