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| -rw-r--r-- | README.md | 17 | ||||
| -rwxr-xr-x | sbin/ln-update | 309 |
2 files changed, 326 insertions, 0 deletions
diff --git a/README.md b/README.md new file mode 100644 index 0000000..8101212 --- /dev/null +++ b/README.md @@ -0,0 +1,17 @@ +## Purpose + +I will place multiple scripts here which may fit a daily-use purpose on Debian systems but are not +covered by the repositories attached to the systems. + +## Shell scripting + +Many executables placed here will be shell scripting. I still prefer this because a bash or ksh is present on most systems, while python or perl not necessarily are. + +Any bash code here is also ksh compliant. ksh means: ksh93, and for AIX you better rely on AIX 7 - while AIX 6 has ksh93 it's a rather nasty fork IBM never cared to update too much. + +## Folders + +* **./aux:** The auxiliaries used to check the validity of this repositories' content, e.g. code checkers +* **./bin:** "executables", intended to be directly run and not sourced +* **./lib:** "libraries", intended to be sourced to provide functions and variables +* **./sbin:** system "executables", intended to be directly run and not sourced diff --git a/sbin/ln-update b/sbin/ln-update new file mode 100755 index 0000000..69640d7 --- /dev/null +++ b/sbin/ln-update @@ -0,0 +1,309 @@ +#!/bin/bash + +# Script works in the following scenario: +# 1. Machine is a debian jessie or more recent, and has systemd +# 2. Machine has rkhunter running +# 3. Optional if update for gitlab-ce available: Machine has a Gitlab instance which is stopped +# by default and needs to be started during upgrade and stopped afterwards +# 4. Optional if needrestart available: needrestart will restart all services it can restart, +# and we will warn the user if there are too critical services remaining and/or +# the running kernel is outdated after upgrading + +# Remark for 3.: This is only necessary because Gitlab does a database backup before actually +# upgrading (which is good), for which it needs to shutdown the Gitlab sub-instances. If +# they are already stopped, this fails (which is not good aka. stupid). If this code was +# better, we'd only need to start the systemd service. But what can you do ¯\_(ツ)_/¯ +# (did I mention already that I'm happy with cgit?) + +APTBIN="$(which apt||echo "/usr/bin/apt")" +RKHBIN="$(which rkhunter||echo "/usr/bin/rkhunter")" +# using -e here because we are not to be blamed if the executable isn't - executable +[ ! -e "$RKHBIN" ]&&unset RKHBIN +#RKHCKP=( "-c" "--sk" "--cronjob" "--rwo" ) +RKHCKP=( "-c" "--sk" "--cronjob" "-q" ) +RKHUDP=( "--propupd" "--cronjob" "-q" ) +STDBIN="$(which systemctl||echo "/bin/systemctl")" +GTLBIN="$(which gitlab-ctl||echo "/usr/bin/gitlab-ctl")" +GTLUNT="gitlab-runsvdir.service" +NDRBIN="$(which needrestart||echo "/usr/sbin/needrestart")" +# -e: see RKHBIN +[ ! -e "$NDRBIN" ]&&unset NDRBIN +NDRCLP=( "-ra" "-blqp" ) +NDRCKP=( "-ra" "-bkqp" ) +RETSAV="\\033[s" +RETCLR="\\033[K" +RETRES="\\033[u" +RETOGE="$(tput cub 666)[ $(tput setaf 2)OK$(tput sgr0) ]$RETRES$RETCLR""." +RETWRN="$(tput cub 666)[$(tput setaf 3)WARN$(tput sgr0)]$RETRES$RETCLR""." +RETERR="$(tput cub 666)[$(tput setaf 1)FAIL$(tput sgr0)]$RETRES$RETCLR""." +SHUTUP=0 +LOGDMP=0;LOGTARG="ln-update" +GTLUPD=0 +RETVAL=0 +retinit() { + echo -ne "[....] $1$RETSAV""..." +} +retinf() { + # Delivers the initial log output to be adjusted by return values + echo -e "$(tput cub 666)[$(tput setaf 7)INFO$(tput sgr0)]$RETRES$RETCLR"" ($(tput setaf 7)$1$(tput sgr0))." +} +gitlab-start() { + # Starts a stopped gitlab instance: unmasks gitlab-runsvdir, starts that service and executes + # gitlab-ctl start. + # RC: + # 3: Unmasking or starting the systemd service failed + # 4: gitlab-ctl start failed + [ "$SHUTUP" -ne 1 ]&&retinit "Enabling and launching Gitlab" + #"$SUDBIN" "$STDBIN" unmask "$GTLUNT" >/dev/null 2>&1 + "$STDBIN" unmask "$GTLUNT" >/dev/null 2>&1 + if [ "$?" -ne 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Unmasking Gitlab systemd unit failed." + return 3 + fi + #"$SUDBIN" "$STDBIN" start "$GTLUNT" >/dev/null 2>&1 + "$STDBIN" start "$GTLUNT" >/dev/null 2>&1 + if [ "$?" -ne 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Launching Gitlab systemd unit failed." + return 3 + fi + sleep 5 + #"$SUDBIN" "$GTLBIN" start >/dev/null 2>&1 + "$GTLBIN" start >/dev/null 2>&1 + if [ "$?" -ne 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Launching Gitlab sub-units failed." + return 4 + fi + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Gitlab enabled and started." +} +gitlab-stop() { + # Stops a started gitlab instance: execution of gitlab-ctl stop succeeded by a stop of + # gitlab-runvsdir.service and masking the latter. + # RC: + # 6: gitlab-ctl stop failed + # 7: systemd unit cannot be stopped or cannot be masked. + # 8: gitlab sub-units still running, i.e. gitlab-ctl stop did not complete everything; or + # the systemd unit is still running + [ "$SHUTUP" -ne 1 ]&&retinit "Stopping Gitlab" + #"$SUDBIN" "$GTLBIN" stop >/dev/null 2>&1 + "$GTLBIN" stop >/dev/null 2>&1 + if [ "$?" -ne 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Stopping Gitlab sub-units failed." + return 6 + fi + #"$SUDBIN" "$STDBIN" stop "$GTLUNT" >/dev/null 2>&1 + "$STDBIN" stop "$GTLUNT" >/dev/null 2>&1 + if [ "$?" -ne 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Stopping Gitlab systemd unit failed." + return 7 + fi + #"$SUDBIN" "$STDBIN" mask "$GTLUNT" >/dev/null 2>&1 + "$STDBIN" mask "$GTLUNT" >/dev/null 2>&1 + case "$?" in + 0) [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE";; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Masking Gitlab systemd unit failed." + return 7 + ;; + esac + [ "$SHUTUP" -ne 1 ]&&retinit "Checking if Gitlab sub-units are stopped" + GLSVCCNT="$("$GTLBIN" status 2>&1|wc -l)" + "$GTLBIN" status >/dev/null 2>&1 + GLSVCSTS="$?" + if [ "$GLSVCSTS" -lt "$GLSVCCNT" ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR (Stopped Gitlab units: $GLSVCSTS/$GLSVCCNT)" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Not all Gitlab sub-units stopped ($GLSVCSTS/$GLSVCCNT)." + return 8 + fi + "$STDBIN" status "$GTLUNT" >/dev/null 2>&1 + TRETVAL="$?" + case "$TRETVAL" in + 3) [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE (Stopped Gitlab units: $GLSVCSTS/$GLSVCCNT, systemd service shut down.)";; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR (systemd: $TRETVAL)" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Gitlab systemd unit cannot be stopped ($TRETVAL)." + return 8 + ;; + esac + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Gitlab stopped and disabled." + unset TRETVAL +} +rkhunter-ck() { + # Checks whether RKHunter reports any warnings or errors prior to updating. + # This is mainly because after the update we will do a property update to have + # the updated binaries and libraries updated in the RKHunter database. To -NOT- + # trash any previous errors we will report an error right away and stop any + # further execution so the admin can fix the situation and then re-run. + # RC: + # 1: RKHunter has any current error or warnings + [ "$SHUTUP" -ne 1 ]&&retinit "Checking RKHunter state" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Starting RKHunter status check." + #"$SUDBIN" "$RKHBIN" "${RKHCKP[@]}" + "$RKHBIN" "${RKHCKP[@]}" + case "$?" in + 0) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "RKHunter status check finished." + ;; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETWRN (check rkhunter logfile)" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "RKHunter state inconsistent." + return 1 + ;; + esac +} +rkhunter-upd() { + # Updates the RKHunter property database after the dist-upgrade so we will not confuse + # this with our mandatory system changes. + # RC: + # 1: if this step fails + [ "$SHUTUP" -ne 1 ]&&retinit "Updating RKHunter database" + "$RKHBIN" "${RKHUDP[@]}" + case "$?" in + 0) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "RKHunter properties update successful." + ;; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR (check rkhunter logfile)" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "RKHunter properties update failed." + return 1 + ;; + esac +} +needrestart-ck() { + # Uses needrestart (Debian package) to check whether any outdated kernel or service with outdated + # libraries are active. For this, we will use needrestart's autostart features, so be aware that we + # -WILL- restart services during the process. + # If there is any service that won't be restarted (needrestart is not unhealthily offensive, honest + # cheers to the devs from here) or if the running kernel is outdated posterior to our upgrades: + # RC: + # 255: Outdated services still active or running kernel outdated + LOCRETVAL=0 + [ "$SHUTUP" -ne 1 ]&&retinit "Checking for services in need of restart" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Checking for services in need of restart..." + LLIBRES="$("$NDRBIN" "${NDRCLP[@]}")" + NAGRETVAL="$?" + case "$NAGRETVAL" in + 0) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "No remaining services running with outdated libs." + ;; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETWRN"&&echo "$LLIBRES"|sed 's/^[^-]\+-\ \([^|]\+\)|.*/\1/g' + [ "$LOGDMP" -eq 1 ]&&logger -p"warning" -t"$LOGTARG" "Some services could not be restarted: $LLIBRES" + LOCRETVAL=255 + ;; + esac + unset LLIBRES + [ "$SHUTUP" -ne 1 ]&&retinit "Checking for outdated kernel..." + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Checking for outdated kernel..." + LKRNRES="$("$NDRBIN" "${NDRCKP[@]}")" + NAGRETVAL="$?" + case "$NAGRETVAL" in + 0) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Kernel is up-to-date." + ;; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETWRN"&&echo "$LKRNRES"|sed 's/^[^-]\+-\ \([^|]\+\)|.*/\1/g' + [ "$LOGDMP" -eq 1 ]&&logger -p"warning" -t"$LOGTARG" "Kernel is outdated: $LKRNRES" + LOCRETVAL=255 + ;; + esac + unset LKRNRES + return "$LOCRETVAL" +} + +while getopts :lq SHOPT;do + case "$SHOPT" in + q)SHUTUP=1;; + l)LOGDMP=1;; + esac +done + +[ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Starting new run..." + +[ "$SHUTUP" -ne 1 ]&&retinit "Checking root privileges" +#ROOTCK="$(sudo id -u)" +ROOTCK="$(id -u)" +case "$ROOTCK" in + 0) [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE";; + *) + [ "$SHUTUP" -ne 1 ]&&echo -ne "$RETERR"&&echo -e " (We need root rights)" + [ "$LOGDMP" -eq 1 ]&&logger -p"warning" -t"$LOGTARG" "Cancelled due to insufficient rights." + exit 1 + ;; +esac + +[ "$SHUTUP" -ne 1 ]&&retinit "Updating Apt database" +#"$SUDBIN" "$APTBIN" -qqq update +"$APTBIN" -qqq update +if [ "$?" -ne 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Cannot update apt database." + exit 2 +fi + +# Make bash not break up the output into array elements on whitespaces but only on encountering line breaks +IFS=$'\n' +UPDARR=( $("$APTBIN" list --upgradable 2>/dev/null) ) +# ...done. +unset IFS +UPDCNT="${#UPDARR[@]}" +unset UPDARR +case "$UPDCNT" in +# 0|1) +# [ "$SHUTUP" -ne 1 ]&&retinf "No updates available :)" +# exit 0 +# ;; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Apt database uodated." + ;; +esac + +"$APTBIN" list --upgradable 2>/dev/null|grep gitlab-ce >/dev/null +if [ "$?" -eq 0 ];then + [ "$SHUTUP" -ne 1 ]&&echo "Encountered Gitlab update." + GTLUPD=1 +fi + +if [ ! -z "$RKHBIN" ];then rkhunter-ck||exit "$?";fi + +if [ "$GTLUPD" -eq 1 ];then gitlab-start||exit "$?";fi + +[ "$SHUTUP" -ne 1 ]&&retinit "Upgrading packages" +#"$SUDBIN" "$APTBIN" -qqq -y dist-upgrade >/dev/null 2>&1 +"$APTBIN" -qqq -y dist-upgrade >/dev/null 2>&1 +case "$?" in + 0) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETOGE" + [ "$LOGDMP" -eq 1 ]&&logger -p"info" -t"$LOGTARG" "Apt dist-upgrade successful." + ;; + *) + [ "$SHUTUP" -ne 1 ]&&echo -e "$RETERR" + [ "$LOGDMP" -eq 1 ]&&logger -p"error" -t"$LOGTARG" "Apt dist-upgrade failed." + exit 5 + ;; +esac + +if [ "$GTLUPD" -eq 1 ];then gitlab-stop||exit "$?";fi + +if [ ! -z "$RKHBIN" ];then rkhunter-upd||exit "$?";fi + +if [ ! -z "$NDRBIN" ];then + needrestart-ck;NDRRETVAL="$?" + # because needrestart-ck only returns warning (RC255), we will only change the script RETVAL + # if it has been 0 prior to this: + if [ "$RETVAL" -eq 0 ];then RETVAL="$NDRRETVAL";fi + unset NDRRETVAL +fi +RETVAL="$?" +exit "$RETVAL" |