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From b60234140cbceaa579b889d03b863953ca53b3e1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=D0=BD=D0=B0=D0=B1?= <nabijaczleweli@nabijaczleweli.xyz>
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Date: Thu, 16 Dec 2021 15:06:06 +0100
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Subject: [PATCH] kernel-install: port to /bin/sh
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(cherry picked from commit 76b1274a5cb54acaa4a0f0c2e570d751f9067c06)
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Related: #2065061
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---
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 src/kernel-install/kernel-install | 109 ++++++++++++------------------
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 1 file changed, 43 insertions(+), 66 deletions(-)
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diff --git a/src/kernel-install/kernel-install b/src/kernel-install/kernel-install
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index f6da0cf7a8..2e8f382d5f 100755
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--- a/src/kernel-install/kernel-install
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+++ b/src/kernel-install/kernel-install
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@@ -1,4 +1,4 @@
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-#!/usr/bin/env bash
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+#!/bin/sh
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 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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 # ex: ts=8 sw=4 sts=4 et filetype=sh
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 # SPDX-License-Identifier: LGPL-2.1-or-later
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@@ -18,7 +18,7 @@
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 # You should have received a copy of the GNU Lesser General Public License
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 # along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-SKIP_REMAINING=77
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+skip_remaining=77
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 usage()
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 {
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@@ -32,24 +32,17 @@ usage()
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 dropindirs_sort()
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 {
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-    local suffix=$1; shift
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-    local -a files
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-    local f d i
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-
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-    readarray -t files <<<"$(
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-        for d in "$@"; do
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-            for i in "$d/"*"$suffix"; do
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-                if [[ -e "$i" ]]; then
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-                    echo "${i##*/}"
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-                fi
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-            done
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-        done | sort -Vu
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-    )"
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-
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-    for f in "${files[@]}"; do
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-        for d in "$@"; do
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-            if [[ -e "$d/$f" ]]; then
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-                echo "$d/$f"
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+    suffix="$1"
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+    shift
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+
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+    for d; do
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+        for i in "$d/"*"$suffix"; do
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+            [ -e "$i" ] && echo "${i##*/}"
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+        done
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+    done | sort -Vu | while read -r f; do
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+        for d; do
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+            if [ -e "$d/$f" ]; then
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+                [ -x "$d/$f" ] && echo "$d/$f"
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                 continue 2
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             fi
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         done
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@@ -65,27 +58,25 @@ for i; do
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     fi
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 done
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-KERNEL_INSTALL_VERBOSE=0
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+export KERNEL_INSTALL_VERBOSE=0
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 if [ "$1" = "--verbose" ] || [ "$1" = "-v" ]; then
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     shift
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     KERNEL_INSTALL_VERBOSE=1
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 fi
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-export KERNEL_INSTALL_VERBOSE
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-if [[ "${0##*/}" == 'installkernel' ]]; then
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-    COMMAND='add'
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-    # make install doesn't pass any parameter wrt initrd handling
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-    INITRD_OPTIONS=()
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+if [ "${0##*/}" = "installkernel" ]; then
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+    COMMAND=add
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+    # make install doesn't pass any initrds
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 else
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     COMMAND="$1"
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-    shift
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-    INITRD_OPTIONS=( "${@:3}" )
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+    [ $# -ge 1 ] && shift
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 fi
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 KERNEL_VERSION="$1"
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 KERNEL_IMAGE="$2"
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+[ $# -ge 2 ] && shift 2
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-if [[ ! $COMMAND ]] || [[ ! $KERNEL_VERSION ]]; then
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+if [ -z "$COMMAND" ] || [ -z "$KERNEL_VERSION" ]; then
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     echo "Not enough arguments" >&2
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     exit 1
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 fi
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@@ -99,12 +90,11 @@ fi
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 # Prefer to use an existing machine ID from /etc/machine-info or /etc/machine-id. If we're using the machine
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 # ID /etc/machine-id, try to persist it in /etc/machine-info. If no machine ID is found, try to generate
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 # a new machine ID in /etc/machine-info. If that fails, use "Default".
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-
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-[ -z "$MACHINE_ID" ] && [ -f /etc/machine-info ] && source /etc/machine-info && MACHINE_ID="$KERNEL_INSTALL_MACHINE_ID"
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-[ -z "$MACHINE_ID" ] && [ -f /etc/machine-id ] && read -r MACHINE_ID 
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-[ -n "$MACHINE_ID" ] && [ -z "$KERNEL_INSTALL_MACHINE_ID" ] && echo "KERNEL_INSTALL_MACHINE_ID=$MACHINE_ID" >>/etc/machine-info
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+[ -z "$MACHINE_ID" ] && [ -r /etc/machine-info ]              && . /etc/machine-info && MACHINE_ID="$KERNEL_INSTALL_MACHINE_ID"
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+[ -z "$MACHINE_ID" ] && [ -r /etc/machine-id ]                && read -r MACHINE_ID 
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+[ -n "$MACHINE_ID" ] && [ -z "$KERNEL_INSTALL_MACHINE_ID" ]   && echo "KERNEL_INSTALL_MACHINE_ID=$MACHINE_ID" >>/etc/machine-info
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 [ -z "$MACHINE_ID" ] && NEW_MACHINE_ID="$(systemd-id128 new)" && echo "KERNEL_INSTALL_MACHINE_ID=$NEW_MACHINE_ID" >>/etc/machine-info
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-[ -z "$MACHINE_ID" ] && [ -f /etc/machine-info ] && source /etc/machine-info && MACHINE_ID="$KERNEL_INSTALL_MACHINE_ID"
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+[ -z "$MACHINE_ID" ] && [ -r /etc/machine-info ]              && . /etc/machine-info && MACHINE_ID="$KERNEL_INSTALL_MACHINE_ID"
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 [ -z "$MACHINE_ID" ] && MACHINE_ID="Default"
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 [ -z "$BOOT_ROOT" ] && for suff in "$MACHINE_ID" "loader/entries"; do
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@@ -125,11 +115,6 @@ done
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 [ -z "$BOOT_ROOT" ] && BOOT_ROOT="/boot"
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-ENTRY_DIR_ABS="$BOOT_ROOT/$MACHINE_ID/$KERNEL_VERSION"
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-
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-export KERNEL_INSTALL_MACHINE_ID="$MACHINE_ID"
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-export KERNEL_INSTALL_BOOT_ROOT="$BOOT_ROOT"
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-
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 if [ -z "$layout" ]; then
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     # Administrative decision: if not present, some scripts generate into /boot.
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     if [ -d "$BOOT_ROOT/$MACHINE_ID" ]; then
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@@ -152,21 +137,23 @@ MAKE_ENTRY_DIR_ABS=$?
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 ret=0
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-readarray -t PLUGINS <<<"$(
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+PLUGINS="$(
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     dropindirs_sort ".install" \
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         "/etc/kernel/install.d" \
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         "/usr/lib/kernel/install.d"
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 )"
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+IFS="
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+"
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-case $COMMAND in
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+case "$COMMAND" in
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     add)
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-        if [[ ! "$KERNEL_IMAGE" ]]; then
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+        if [ -z "$KERNEL_IMAGE" ]; then
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             echo "Command 'add' requires an argument" >&2
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             exit 1
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         fi
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-        if [[ ! -f "$KERNEL_IMAGE" ]]; then
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-            echo "Kernel image argument ${KERNEL_IMAGE} not a file" >&2
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+        if ! [ -f "$KERNEL_IMAGE" ]; then
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+            echo "Kernel image argument $KERNEL_IMAGE not a file" >&2
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             exit 1
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         fi
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@@ -182,32 +169,22 @@ case $COMMAND in
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             fi
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         fi
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-        for f in "${PLUGINS[@]}"; do
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-            if [[ -x $f ]]; then
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-                [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
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-                    echo "+$f add $KERNEL_VERSION $ENTRY_DIR_ABS $KERNEL_IMAGE ${INITRD_OPTIONS[*]}"
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-                "$f" add "$KERNEL_VERSION" "$ENTRY_DIR_ABS" "$KERNEL_IMAGE" "${INITRD_OPTIONS[@]}"
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-                x=$?
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-                if [ $x -eq "$SKIP_REMAINING" ]; then
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-                    break
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-                fi
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-                ((ret+=x))
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-            fi
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+        for f in $PLUGINS; do
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+            [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && echo "+$f add $KERNEL_VERSION $ENTRY_DIR_ABS $KERNEL_IMAGE $*"
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+            "$f" add "$KERNEL_VERSION" "$ENTRY_DIR_ABS" "$KERNEL_IMAGE" "$@"
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+            err=$?
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+            [ $err -eq $skip_remaining ] && break
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+            ret=$(( ret + err ))
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         done
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         ;;
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     remove)
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-        for f in "${PLUGINS[@]}"; do
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-            if [[ -x $f ]]; then
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-                [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
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-                    echo "+$f remove $KERNEL_VERSION $ENTRY_DIR_ABS"
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-                "$f" remove "$KERNEL_VERSION" "$ENTRY_DIR_ABS"
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-                x=$?
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-                if [ $x -eq "$SKIP_REMAINING" ]; then
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-                    break
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-                fi
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-                ((ret+=x))
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-            fi
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+        for f in $PLUGINS; do
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+            [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && echo "+$f remove $KERNEL_VERSION $ENTRY_DIR_ABS"
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+            "$f" remove "$KERNEL_VERSION" "$ENTRY_DIR_ABS"
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+            err=$?
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+            [ $err -eq $skip_remaining ] && break
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+            ret=$(( ret + err ))
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         done
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         if [ "$MAKE_ENTRY_DIR_ABS" -eq 0 ]; then