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-rw-r--r--README.md17
-rwxr-xr-xsbin/ln-update309
2 files changed, 326 insertions, 0 deletions
diff --git a/README.md b/README.md
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+++ b/README.md
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+## 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+# the running kernel is outdated after upgrading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"