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#!/bin/sh

# needrestart - Restart daemons after library updates.
#
# Authors:
#   Thomas Liske <thomas@fiasko-nw.net>
#
# Copyright Holder:
#   2013 - 2022 (C) Thomas Liske [http://fiasko-nw.net/~thomas/]
#
# License:
#   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 will 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 package; if not, write to the Free Software
#   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

# handle verbose mode
if [ "$1" = "1" ]; then
    set -x
fi

# filter for processor signature (and flags if available)
sig=$(iucode_tool --scan-system 2>&1 | grep -oE '[^[:space:]]+$') #'
if [ -r /sys/devices/system/cpu/cpu0/microcode/processor_flags ]; then
    filter="-s $sig,"$(cat /sys/devices/system/cpu/cpu0/microcode/processor_flags)
else
    filter="-S"
fi

# allow local command override
test -r /etc/needrestart/iucode.sh && . /etc/needrestart/iucode.sh

# early boot initrd (required at least on Arch Linux)
if type bsdtar > /dev/null 2>&1 ; then
    imgfiles=""
    for img in /boot/intel-ucode.img /boot/early_ucode.cpio ; do
        if [ -r "$img" ]; then
            imgfiles="$imgfiles $img"
        fi
    done

    if [ -n "$imgfiles" ]; then
        cat $imgfiles | bsdtar -Oxf /dev/stdin | iucode_tool -l $filter -tb - 2>&1
        exit $?
    fi
fi

# look for microcode updates in the filesystem
IUCODE_TOOL_EXTRA_OPTIONS=""

test -r /etc/default/intel-microcode && . /etc/default/intel-microcode

# do not scan if adding Intel microcode to initrd is disabled
test "$IUCODE_TOOL_INITRAMFS" = "no" && exit 0

# run iucode_tool to scan for microcodes
if [ -r /usr/share/misc/intel-microcode* ]; then
    exec iucode_tool -l $filter --ignore-broken -tb /lib/firmware/intel-ucode -ta /usr/share/misc/intel-microcode* 2>&1
    exit $?
fi

iucode_tool -l $filter --ignore-broken $IUCODE_TOOL_EXTRA_OPTIONS -tb /lib/firmware/intel-ucode 2>&1 | grep "$sig"