feat: Implemented a notification service for unhealthy containers.

* obsolescent egrep calls have removed;
* /usr/local/bin has been added to PATH for cron calls.

.templates/bin/.launcher

@@ -28,6 +28,9 @@
 # Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
 #         Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-04 v1.1
+# mod: the obsolescent egrep calls have been changed to POSIX grep -E calls.
+# fix: /usr/local/bin was missing from the PATH for cron calls.
 # 2023-06-18 v1.0
 # new: forked from the "SMARTERP_skeleton" repository.
 # mod: "instance" => "service"
@@ -95,14 +98,14 @@ if [ -n "$CRON" ]; then
     # Ubuntu gets the initial environment from a separate file.
     if [ -r "/etc/environment" ]; then
         # Extracts from this file, strips the right part w/o quotes.
-        includepath=$(cat "/etc/environment" | $(which egrep) '^PATH=')
+        includepath=$(cat "/etc/environment" | $(which grep) -E '^PATH=')
         includepath=${includepath:5}
         includepath="${includepath%\"}"; includepath="${includepath#\"}"
         [[ -n "$includepath" ]] && PATH="$PATH:$includepath"
         unset includepath
     fi
-    # We need the $HOME/bin as well.
+    # We need the $HOME/bin and /usr/local/bin paths as well.
-    PATH="$HOME/bin:$PATH"
+    PATH="$HOME/bin:/usr/local/bin:$PATH"
 fi
 # We need also the sbin directories.
 if ! [[ "$PATH" =~ '/sbin:' ]]; then PATH="$PATH:/usr/local/sbin:/usr/sbin:/sbin"; fi
@@ -111,7 +114,6 @@ if ! [[ "$PATH" =~ '/sbin:' ]]; then PATH="$PATH:/usr/local/sbin:/usr/sbin:/sbin
 #
 TR=$(which tr 2>/dev/null)
 if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
-#for item in basename df egrep head mail printf sleep
 for item in basename printf sleep
 do
     if [ -n "$(which $item)" ]

.templates/bin/containermon_redeploy

@@ -0,0 +1,74 @@
+#!/bin/bash
+#
+# https://github.com/containrrr/shoutrrr/tree/main
+# https://github.com/RafhaanShah/Container-Mon
+#
+# Email notification settings below assume the gateway acting
+# as a smarthost and Docker version v20.10+ is required.
+
+image="ghcr.io/rafhaanshah/container-mon"
+instance="containermon"
+networks=""
+outfile=""
+volume=""
+
+MSG_MISSINGDEP="Fatal: missing dependency"
+
+# Checks the dependencies.
+TR=$(which tr 2>/dev/null)
+if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
+for item in cat dirname docker hostname
+do
+    if [ -n "$(which $item)" ]
+    then export $(echo $item | "$TR" '[:lower:]' '[:upper:]')=$(which $item)
+    else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
+done
+
+# Stops and removes the container (if necessary).
+if [ -n "$("$DOCKER" ps -q -f name=$instance)" ]
+then "$DOCKER" stop "$instance"; fi
+if [ -n "$("$DOCKER" ps -a -q -f name=$instance)" ]
+then "$DOCKER" rm "$instance"; fi
+
+# Checks for an upgrade.
+$DOCKER pull "$image"
+
+# Creates the container.
+$DOCKER create \
+    -e TZ="Europe/Budapest" \
+    -e CONTAINERMON_CHECK_EXIT_CODE=false \
+    -e CONTAINERMON_CHECK_STOPPED=false \
+    -e CONTAINERMON_CRON="*/2 * * * *" \
+    -e CONTAINERMON_FAIL_LIMIT=1 \
+    -e CONTAINERMON_NOTIFICATION_URL="smtp://host.docker.internal:25/?from=$USER@$("$HOSTNAME" -f)&to=$USER@$("$HOSTNAME")&subject=[[Containermon $(hostname)]]" \
+    -e CONTAINERMON_HEALTHY_NOTIFICATION_URL="smtp://host.docker.internal:25/?from=$USER@$("$HOSTNAME" -f)&to=$USER@$("$HOSTNAME")&subject=[[Containermon $(hostname)]]" \
+	-e CONTAINERMON_NOTIFY_HEALTHY=true \
+    -e CONTAINERMON_MESSAGE_PREFIX="" \
+    -e CONTAINERMON_USE_LABELS=true \
+    -v /var/run/docker.sock:/var/run/docker.sock \
+    --add-host="host.docker.internal:host-gateway" \
+    --restart unless-stopped \
+    --label "com.centurylinklabs.watchtower.enable=true" \
+    --name $instance $image
+
+# Connects it to the network(s).
+if [ -n "$networks" ]; then
+    for network in $networks
+    do
+        # Checks the network, creates it if necessary.
+        if [ -z "$("$DOCKER" network ls -q -f name=$network)" ]
+        then "$DOCKER" network create -d bridge "$network"; fi
+        # Then connects.
+        $DOCKER network connect $network $instance
+    done
+fi
+
+# Finally launches it.
+$DOCKER start $instance
+# Adds the time zone handler package to the running container.
+$DOCKER exec  $instance sh -c "apk add tzdata"
+if [ -n "$outfile" -a -w "$("$DIRNAME" "$outfile")" ]; then
+    # Sets a background process to collect the image's output.
+    # This process will automatically terminate when the image stops.
+    "$DOCKER" logs -f $instance >>"$outfile" 2>&1 &
+fi

.templates/bin/maintenance_daily

@@ -7,6 +7,8 @@
 # Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
 #         Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-04 v1.2
+# fix: /usr/local/bin was missing from the PATH for cron calls.
 # 2026-05-01 v1.1
 # new: dnf support has been added for Oracle/RHEL compatibility.
 # mod: the egrep calls have been replaced by grep -E command
@@ -66,8 +68,8 @@ if [ -n "$CRON" ]; then
         [[ -n "$includepath" ]] && PATH="$PATH:$includepath"
         unset includepath
     fi
-    # We need the $HOME/bin as well.
+    # We need the $HOME/bin and /usr/local/bin paths as well.
-    PATH="$HOME/bin:$PATH"
+    PATH="$HOME/bin:/usr/local/bin:$PATH"
 fi
 # We need also the sbin directories.
 if ! [[ "$PATH" =~ '/sbin:' ]]; then PATH="$PATH:/usr/local/sbin:/usr/sbin:/sbin"; fi

.templates/bin/maintenance_midnight

@@ -7,6 +7,9 @@
 # Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
 #         Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-04 v1.1
+# mod: the obsolescent egrep calls have been changed to POSIX grep -E calls.
+# fix: /usr/local/bin was missing from the PATH for cron calls.
 # 2023-06-18 v1.0
 # new: forked from the "SMARTERP_skeleton" repository.
 # mod: "instance" => "service"
@@ -45,14 +48,14 @@ if [ -n "$CRON" ]; then
     # Ubuntu gets the initial environment from a separate file.
     if [ -r "/etc/environment" ]; then
         # Extracts from this file, strips the right part w/o quotes.
-        includepath=$(cat "/etc/environment" | $(which egrep) '^PATH=')
+        includepath=$(cat "/etc/environment" | $(which grep) -E '^PATH=')
         includepath=${includepath:5}
         includepath="${includepath%\"}"; includepath="${includepath#\"}"
         [[ -n "$includepath" ]] && PATH="$PATH:$includepath"
         unset includepath
     fi
-    # We need the $HOME/bin as well.
+    # We need the $HOME/bin and /usr/local/bin paths as well.
-    PATH="$HOME/bin:$PATH"
+    PATH="$HOME/bin:/usr/local/bin:$PATH"
 fi
 # We need also the sbin directories.
 if ! [[ "$PATH" =~ '/sbin:' ]]; then PATH="$PATH:/usr/local/sbin:/usr/sbin:/sbin"; fi

.templates/bin/maintenance_reboot

@@ -7,6 +7,9 @@
 # Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
 #         Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-04 v1.1
+# mod: the obsolescent egrep calls have been changed to POSIX grep -E calls.
+# fix: /usr/local/bin was missing from the PATH for cron calls.
 # 2023-06-18 v1.0
 # new: forked from the "SMARTERP_skeleton" repository.
 # mod: "instance" => "service"
@@ -45,14 +48,14 @@ if [ -n "$CRON" ]; then
     # Ubuntu gets the initial environment from a separate file.
     if [ -r "/etc/environment" ]; then
         # Extracts from this file, strips the right part w/o quotes.
-        includepath=$(cat "/etc/environment" | $(which egrep) '^PATH=')
+        includepath=$(cat "/etc/environment" | $(which grep) -E '^PATH=')
         includepath=${includepath:5}
         includepath="${includepath%\"}"; includepath="${includepath#\"}"
         [[ -n "$includepath" ]] && PATH="$PATH:$includepath"
         unset includepath
     fi
-    # We need the $HOME/bin as well.
+    # We need the $HOME/bin and /usr/local/bin paths as well.
-    PATH="$HOME/bin:$PATH"
+    PATH="$HOME/bin:/usr/local/bin:$PATH"
 fi
 # We need also the sbin directories.
 if ! [[ "$PATH" =~ '/sbin:' ]]; then PATH="$PATH:/usr/local/sbin:/usr/sbin:/sbin"; fi

.templates/bin/psql_dumpdb

@@ -20,6 +20,8 @@
 # Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
 #         Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-04 v1.1
+# mod: the obsolescent egrep calls have been changed to POSIX grep -E calls.
 # 2023-06-18 v1.0
 # new: forked from the "SMARTERP_skeleton" repository.
 # 2022-11-03 v0.4
@@ -131,7 +133,7 @@ done; shift $((OPTIND -1))
 # Common dependencies.
 TR=$(which tr 2>/dev/null)
 if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
-for item in basename df date dirname egrep grep gzip hostname id \
+for item in basename df date dirname grep gzip hostname id \
             pwd sed tail tee $additem
 do
     if [ -n "$(which $item)" ]
@@ -346,8 +348,8 @@ else
 	    # 1st the schema with some arbitrary conversions.
 	    "$PG_DUMP" $CONNECT \
         	       $PGDUMPACLS --schema-only -d "$PGDATABASE" | \
-    	    "$EGREP" -iv '^SET idle_in_transaction_session_timeout =' | \
+    	    "$GREP" -E -iv '^SET idle_in_transaction_session_timeout =' | \
-	    "$EGREP" -iv '^SET default_table_access_method =' | \
+	    "$GREP" -E -iv '^SET default_table_access_method =' | \
 	    "$SED" 's/FUNCTION =/PROCEDURE = /' | \
 	    "$SED" "s/CURRENT_DATE/\('now'::text\)::date/g"
 	    # 2nd the data as COPY statements.
@@ -358,8 +360,8 @@ else
 	    # 1st the schema with some arbitrary conversions.
 	    "$PG_DUMP" $CONNECT \
         	       $PGDUMPACLS --schema-only -d "$PGDATABASE" | \
-    	    "$EGREP" -iv '^SET idle_in_transaction_session_timeout =' | \
+    	    "$GREP" -E -iv '^SET idle_in_transaction_session_timeout =' | \
-	    "$EGREP" -iv '^SET default_table_access_method =' | \
+	    "$GREP" -E -iv '^SET default_table_access_method =' | \
 	    "$SED" 's/FUNCTION =/PROCEDURE = /' | \
 	    "$SED" "s/CURRENT_DATE/\('now'::text\)::date/g" \
 	    >"$PGDUMPFILE" 2>>"$logfile"; result=$?

.templates/bin/rotate_folder

@@ -55,6 +55,8 @@
 # Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
 #         Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-04 v1.4
+# mod: the obsolescent egrep calls have been changed to POSIX grep -E calls.
 # 2025-09-15 v1.3
 # fix: now correctly handles "zero elements to keep" directives.
 # 2025-08-12 v1.2
@@ -127,7 +129,7 @@ done
 # Checks the dependencies.
 TR=$(which tr 2>/dev/null)
 if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
-for item in basename date dirname egrep sed seq sort stat xargs
+for item in basename date dirname grep sed seq sort stat xargs
 do
     if [ -n "$(which $item)" ]
     then export $(echo $item | "$TR" '[:lower:]' '[:upper:]')=$(which $item)
@@ -219,11 +221,11 @@ function rotate_class {
     if [ -z "$CLASSES_PATTERN" ]; then
 	# All non-hidden files but no subfolders, symlinks, etc.
 	files=$(cd "$BACKUP_FOLDER"; \
-    	        ls -1 -t --file-type | "$XARGS" -0 | "$EGREP" -v '[/=>@|$]$' )
+    	        ls -1 -t --file-type | "$XARGS" -0 | "$GREP" -E -v '[/=>@|$]$' )
     else
 	# Non-hidden files (but no subfolders, symlinks, etc.) matching to the pattern.
 	files=$(cd "$BACKUP_FOLDER"; \
-    	        ls -1 -t --file-type | "$XARGS" -0 | "$EGREP" "$CLASSES_PATTERN" )
+    	        ls -1 -t --file-type | "$XARGS" -0 | "$GREP" -E "$CLASSES_PATTERN" )
     fi
     # Lack of files gives it up here.
     [[ -z "$files" ]] && return
@@ -401,7 +403,7 @@ function rotate_classes {
     # Tries to validate the pattern.
     # Test calls simulate the later use.
     if [ -n "$CLASSES_PATTERN" ]; then
-	echo "test" | "$EGREP" "$CLASSES_PATTERN" >/dev/null 2>&1
+	echo "test" | "$GREP" -E "$CLASSES_PATTERN" >/dev/null 2>&1
 	[[ $? -gt 1 ]] && return # unusable
     fi
     # Does contain unexplored classifiers?
@@ -413,7 +415,7 @@ function rotate_classes {
 	# Needs further exploring.
 	# Non-hidden files (but no subfolders, symlinks, etc.) matching to the pattern.
 	local files=$(cd "$BACKUP_FOLDER"; \
-                      ls -1 -t --file-type | "$XARGS" -0 | "$EGREP" "$CLASSES_PATTERN" )
+                      ls -1 -t --file-type | "$XARGS" -0 | "$GREP" -E "$CLASSES_PATTERN" )
 	# Selects the qualifier substrings which actually have matching files.
 	local classes=$(echo -e "$files" | "$SED" -E "s/$CLASSES_PATTERN/\1/" | "$SORT" -u)
 	# Enumerates these qualifiers.
@@ -434,7 +436,7 @@ if [ -z "$CLASSES_PATTERN" ]; then
     rotate_class
 else
     # Tries to validate the pattern (loosely).
-    echo "test" | "$EGREP" "$CLASSES_PATTERN" >/dev/null 2>&1
+    echo "test" | "$GREP" -E "$CLASSES_PATTERN" >/dev/null 2>&1
     [[ $? -gt 1 ]] && echo -e "$MSG_BADPATTERN $CLASSES_PATTERN" >&2 && exit 1
     # Seems to be valid, go on!
     rotate_classes "$CLASSES_PATTERN"

.templates/bin/watchtower_redeploy

@@ -58,6 +58,7 @@ $DOCKER create \
     --add-host="host.docker.internal:host-gateway" \
     --restart unless-stopped \
     --label "com.centurylinklabs.watchtower.enable=true" \
+    --label "containermon.enable=true" \
     --name $instance $image
 
 # Connects it to the network(s).

.utils/mail/README.md

@@ -1,3 +1,7 @@
-# Wrapper scripts to various mail transfer agents.
+# Wrapper scripts to various mail agents
-Only needed if your system does not provide the POSIX mailx compatible mail command. If sending email is prohibited from your environment use *mail.dummy* to avoid warnings from cron, etc.
+
-To activate, choose a suitable one then place it somewhere in the path (~/bin or /usr/local/bin are recommended), name it mail and give it execute permission.
+Only needed if your system does not provide a local MTA (e.g *sendmail*) and/or a POSIX *mailx* compatible mail command.
+
+To activate, choose a suitable one then place it somewhere in the path (*/usr/local/bin* is recommended), name or symlink it to *mail* and give it execute permission to anyone.
+
+To use them with *crond*, you may need the *cronmail* converter script, which can accept sendmail-formatted mail and convert it into a suitable *mailx* call. You can usually set this script as a mail sender for *crond* using the *CRONDARGS* environment variable.

.utils/mail/cronmail

@@ -0,0 +1,52 @@
+#!/bin/bash
+#
+# This is a sendmail to mailx format converter script.
+# It receives a well-formed email text from standard input, parses it,
+# and invokes a POSIX mailx compliant mail user agent with the result.
+#
+# It is primarily designed to use with crond. To activate
+# use CRONDARGS="-m pathname_to_cronmail" in/etc/default/cron or
+# /etc/sysconfig/crond configuration.
+#
+# Author: Kovács Zoltán <kovacsz@marcusconsulting.hu>
+# License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-05-02 v0.1 Initila release.
+
+# Initialisations.
+#
+SUBJECT=""
+RECIPIENT="$USER"			# Default recipient.
+MESSAGE=""
+MUA="/usr/local/bin/mail"		# Custom mail user agent script.
+
+# Parsing the stdin line by line.
+#
+while IFS= read -r line
+do
+    # Parses the recipient.
+    if [[ "$line" =~ ^(T|t)o:\ .*$ ]]; then
+	RECIPIENT="${line#*: }"
+    # Parses the subject line.
+    elif [[ "$line" =~ ^(S|s)ubject:\ .*$ ]]; then
+	SUBJECT="${line#*: }"
+    # Message body starts with an empty line.
+    elif [[ "$line" =~ ^$ ]]; then
+	MESSAGE+="\n"
+    # Collects the message body lines.
+    # The first empty line will be stripped.
+    elif [ -n "$MESSAGE" ]; then
+	[[ "$MESSAGE" = "\n" ]] \
+	&& MESSAGE="$line\n" \
+	|| MESSAGE+="$line\n"
+    fi
+done
+
+# Calls the mail user agent.
+#
+if [ -x "$MUA" ]; then
+    if [ -n "$SUBJECT" -o -n "$MESSAGE" ]; then
+	echo -e "$MESSAGE" | "$MUA" -s "$SUBJECT" "$RECIPIENT"
+    fi
+fi
+
+# That's all, Folks! :)

.utils/mail/mail.dummy

@@ -1,3 +0,0 @@
-#!/bin/bash
-#
-# Dummy file to met the dependencies. Does nothing.

.utils/mail/s-nail

@@ -20,7 +20,7 @@ SMTP_PASS="topsecret"
 
 # s-nail call.
 #
-if [ -x "$(which s-nail 2>/dev/null)" ]; then
+if [ -x "/bin/s-nail" ]; then
     # The recipient's address is the last argument.
     recipient="${@: -1}"
     set -- "${@: 1: $#-1}"
@@ -29,10 +29,10 @@ if [ -x "$(which s-nail 2>/dev/null)" ]; then
     [[ "$recipient" = "$USER" ]] && recipient="$TO"
     [[ "$recipient" = "$USER@$HOSTNAME" ]] && recipient="$TO"
     if [ -n "$recipient" ]; then
-    "$(which s-nail)" -S from="$FROM" -S v15-compat \
+    "/bin/s-nail" -S from="$FROM" -S v15-compat \
-	              -S smtp-auth="login" -S smtp-use-starttls \
+	          -S smtp-auth="login" $([[ "$SMTP_PROTO" = "submission" ]] && echo "-S smtp-use-starttls") \
-	              -S mta="$SMTP_PROTO://$SMTP_USER:$SMTP_PASS@$SMTP_SERVER" \
+	          -S mta="$SMTP_PROTO://$SMTP_USER:$SMTP_PASS@$SMTP_SERVER" \
-	              -S record="/var/mail/$USER" \
+	          -S record="/var/mail/$USER" \
-	              "${@}" $recipient
+	          "${@}" $recipient
     fi
 fi

tools/backup.d/configs_backup.sh

@@ -5,6 +5,8 @@
 #
 # Author: Kovács Zoltán <kovacsz@marcusconsulting.hu>
 # License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2026-04-28 v0.3
+# mod: now includes all files (not only YMLFILE) in the base folder.
 # 2024-03-07 v0.2
 # fix: tar now dereferences the symlinks (if any).
 # 2021-09-03 v0.1 Initial release
@@ -26,7 +28,7 @@ MSG_NONWRITE="The target directory isn't writable"
 # Checks the dependencies.
 TR=$(which tr 2>/dev/null)
 if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
-for item in date dirname hostname readlink tar
+for item in date dirname find hostname readlink tar
 do
     if [ -n "$(which $item)" ]
     then export $(echo $item | "$TR" '[:lower:]' '[:upper:]' | "$TR" '-' '_')=$(which $item)
@@ -72,8 +74,8 @@ if [ -w "$BACKUPDIR" ]; then
     BACKUP_NAME="configs.$("$DATE" '+%Y%m%d_%H%M%S').$("$HOSTNAME")"
     ( cd "$BASE_DIR"
       "$TAR" czhf "$BACKUPDIR/$BACKUP_NAME.tgz" \
-             "$YMLFILE" configs docker \
+             $("$FIND" -maxdepth 1 -type f) configs docker \
-	     2>>"$BACKUPDIR/$BACKUP_NAME.log"
+             2>>"$BACKUPDIR/$BACKUP_NAME.log"
     )
 fi
 

tools/check_certificates

@@ -6,6 +6,9 @@
 # See https://github.com/Matty9191/ssl-cert-check for details.
 #
 # Author: Kovács Zoltán <kovacsz@marcusconsulting.hu>
+# 2026-05-04 v0.2
+# mod: It now also checks the dependencies of the worker script.
+# fix: Suppresses error output during 'which' calls.
 # 2026-02-16 v0.1 Initial release
 
 # Accepted environment variables and their defaults.
@@ -27,12 +30,13 @@ MSG_MISSINGYML="Fatal: didn't find the docker-compose.yml file"
 LANG=C
 LC_ALL=C
 
-# Checks the dependencies.
+# Checks the dependencies (including the worker script's).
 TR=$(which tr 2>/dev/null)
 if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
-for item in basename dirname find readlink
+for item in basename dirname find readlink \
+            awk date grep mktemp openssl printf
 do
-    if [ -n "$(which $item)" ]
+    if [ -n "$(which $item 2>/dev/null)" ]
     then export $(echo $item | "$TR" '[:lower:]' '[:upper:]' | "$TR" '-' '_')=$(which $item)
     else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
 done