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#!/bin/bash
#
# Automatically update your system on reboot using packages in the UPDATE_DIR.
#
# Sometimes there are additional steps to make when your kernel is updated.
# You can define these in a custom 'install-kernel' command which this script
# will run if found. We recommend placing this under /usr/local/sbin.
#
# The init system is run without a $USER or $HOME, and they are needed for some
# applications.
export GNUPGHOME="$(getent passwd root | cut -d: -f6)/.gnupg"
# A local Slackware mirror with just enough information to support slackpkg.
#
# This step could be skipped if slackpkg supports downloading updates without
# installing them.
LOCAL_MIRROR=${LOCAL_MIRROR:-"/var/cache/slack-autoupdate/mirror"}
# slackpkg exit code when updates are available.
SLACKPKG_UPDATES_PENDING=100
# Where packages are stored pending installation. You can use sub-directories
# to order and group packages.
UPDATE_DIR="/var/spool/slack-autoupdate"
# Where information about pending updates is stored.
UPDATE_INFO="$UPDATE_DIR/info.txt"
# Where information about failed updates is stored.
UPDATE_ERROR="$UPDATE_DIR/error.txt"
UPDATES=$(find "$UPDATE_DIR" -name '*.t*z' | sort)
SLACKPKG_UPDATES="$(slackpkg -mirror="file:///$LOCAL_MIRROR/" check-updates 1>/dev/null 2>/dev/null; echo $?)"
if [ -z "$UPDATES" ] && [ "$SLACKPKG_UPDATES" != "$SLACKPKG_UPDATES_PENDING" ]; then
exit 0
fi
if read -r -t 5 -p "Installing updates, press enter to skip this process..."; then
exit 0
fi
OLD_KERNEL="$(realpath /boot/vmlinuz)"
if [ "$SLACKPKG_UPDATES" == "$SLACKPKG_UPDATES_PENDING" ]; then
slackpkg -batch=on -default_answer=n -mirror="file:///$LOCAL_MIRROR/" update >/dev/null
slackpkg -batch=on -default_answer=y -postinst=off -mirror="file:///$LOCAL_MIRROR/" upgrade-all
fi
for PKG in $UPDATES; do
upgradepkg --install-new "$PKG" &&
rm "$PKG"
done
NEW_KERNEL="$(realpath /boot/vmlinuz)"
if [ "$OLD_KERNEL" != "$NEW_KERNEL" ]; then
if command -v install-kernel &> /dev/null; then
install-kernel "$NEW_KERNEL"
fi
fi
# All package updates have been processed.
find "$UPDATE_DIR" -mindepth 1 -not -path "$UPDATE_DIR_IGNORED/*" | xargs rm -fr
reboot
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