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#!/usr/bin/env bash
# A script to upgrade a RHEL derivative (Fedora, CentOS, ...). If you have ansible or puppet:
# this is way more simple with an automation framework. This script works with the paradigm
# that you only have a bash available and you want to see what happens without being murdered
# by gazillions of output lines.
# This script avoids combining options, e.g. dnf -C -q instead of dnf -Cq, since
# dnf is perfectly capable of POSIX standards, but yum fails at combined parameters.
# So we'll leave it this way in case of conversion of this script to yum or extension
# to be capable of both. (tl;dr no combined options because yum sucks at POSIX standards)
# LOGGING UNIT
# We are not ignoring logging frameworks like many software out there. We'll be using logger(1) to
# log what we are doing, and it's up to you to redirect it to a specific file if you need to.
# Define the name of the logging unit/tag here:
LOGUNIT="dnfu"
# DETAILED LOG
# To not spam the logging centre with all of our debug, we will create a temporary file nonetheless.
# The script will log its destination in the end, so we can make use of mktemp(1) here.
DLOG="$(mktemp -p /tmp dnfu.XXXXXX)"||exit 1
chmod a+r "$DLOG"||exit 1
LOGGER="$(which logger 2>/dev/null||/usr/bin/logger)"
LCMD="$LOGGER -plocal0.info -it $LOGUNIT"
LWCMD="$LOGGER -plocal0.warning -it $LOGUNIT"
LECMD="$LOGGER -plocal0.err -it $LOGUNIT"
ROK="\033[666D[ \033[32mOK\033[0m ]\033[u\033[K"
RWRN="\033[666D[\033[33mWARN\033[0m]\033[u\033[K"
RERR="\033[666D[\033[31mFAIL\033[0m]\033[u\033[K"
RINF="\033[666D[\033[37mINFO\033[0m]\033[u\033[K"
echo>"$DLOG"
UPDAVAIL=1
SCMD="$(command -v snap 2>/dev/null)"
UCMD="$(command -v dnf 2>/dev/null)"
[ "$?" -ne 0 ]&&UCMD="$(command -v yum 2>/dev/null)"
[ -z "$UCMD" ]&&printf "Neither yum nor dnf found!\n" >&2&&exit 1
RETVAL=0
function radd {
[ -z "$1" ]&&return 1
printf "\033[666D\033[u\033[K \033[37m(%b)\033[0m" "$1"
}
function rbeg {
[ -z "$1" ]&&return 1
printf "[....] %b.\033[s.." "$1"
}
function rok {
case "$1" in
"") printf "%b\n" "$ROK";;
*)
printf "%b" "$ROK"
radd "$1"
printf "\n"
;;
esac
}
function rwrn {
case "$1" in
"") printf "%b\n" "$RWRN";;
*)
printf "%b" "$RWRN"
radd "$1"
printf "\n"
;;
esac
}
function rerr {
case "$1" in
"") printf "%b\n" "$RERR";;
*)
printf "%b" "$RERR"
radd "$1"
printf "\n"
;;
esac
}
function rinf {
case "$1" in
"") printf "%b\n" "$RINF";;
*)
printf "%b" "$RINF"
radd "$1"
printf "\n"
;;
esac
}
function supgrade {
#printf "Listing updates...:\n"
#sudo "${UCMD}" -C check-upgrade 2>&1|sed "s/^/$(date --rfc-3339=seconds) /">>"$DLOG"
#case "${PIPESTATUS[0]}" in
# 0) $LCMD "No updates found.";;
# 100) $LCMD "Updates found.";;
# *) $LECMD "check-upgrade went wrong!";RETVAL=1;return 1;;
#esac
rbeg "Upgrading system packages"
sudo "${UCMD}" -y upgrade 2>&1|sed "s/^/$(date --rfc-3339=seconds) /">>"$DLOG"
case "${PIPESTATUS[0]}" in
0) $LCMD "Upgrade OK.";rok;;
1)
$LWCMD "Error on upgrade, but handled by dnf."
rwrn "error occurred but was handled by dnf"
case "RETVAL" in
0) RETVAL=255;;
esac
;;
255)
$LWCMD "Upgrade finished, pending updates remaining."
rwrn "Upgrade done but updates remaining"
case "$RETVAL" in
0) RETVAL=255;;
esac
;;
*)
$LECMD "Upgrade failed."
rerr
RETVAL=1;return 1
;;
esac
printf "Checking for outdated running services or necessity to reboot...:\n"
sudo "${UCMD}" needs-restarting -C --color true 2>&1|tee -a "$DLOG"
sudo "$UCMD" needs-restarting -r >/dev/null 2>&1 ||$LWCMD "Reboot required."||:
}
function snrefresh {
rbeg "Refreshing snapd snaps"
sudo "${SCMD}" refresh 2>&1|sed "s/^/$(date --rfc-3339=seconds) /">>$DLOG
case "${PIPESTATUS[0]}" in
0) $LCMD "Snaps refreshed.";rok;;
*) $LECMD "Error on refreshing snaps.";rerr;RETVAL=1;return 1;;
esac
}
rbeg "Updating dnf cache"
sudo "${UCMD}" makecache 2>&1|sed "s/^/$(date --rfc-3339=seconds) /" >> "$DLOG"
case "${PIPESTATUS[0]}" in
0) $LCMD "DNF cache update OK.";rok;;
100) $LWCMD "RC 100 on makecache.";rwrn;;
*) $LECMD "DNF cache update failed!";rerr;exit 1;;
esac
rbeg "Checking for upgrades"
sudo "${UCMD}" -C check-upgrade 2>&1|sed "s/^/$(date --rfc-3339=seconds) /">>"$DLOG"
case "${PIPESTATUS[0]}" in
0)
$LCMD "No updates found.";rinf "No updates"
;;
100)
$LCMD "Updates found."
rok "Updates found"
UPDAVAIL=0
;;
*) $LECMD "check-upgrade went wrong!";rerr;exit 1;;
esac
if [ "$UPDAVAIL" -eq 0 ];then
supgrade
fi
if [ ! -z "$SCMD" ];then
snrefresh
fi
$LCMD "Detailed logfile is located at $DLOG."
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