Fix lastrunfile logic and add lastbackup helper script.

docker/Dockerfile

@@ -41,3 +41,6 @@ RUN touch etc/s6-overlay/s6-rc.d/user/contents.d/backup
 
 COPY ./src/s6-services/cron-backup /etc/s6-overlay/s6-rc.d/cron-backup
 RUN touch etc/s6-overlay/s6-rc.d/user/contents.d/cron-backup
+
+COPY ./src/helper_scripts/* /usr/local/sbin/
+RUN chmod +x /usr/local/sbin/*

docker/dos2unix.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
 # shellcheck shell=bash
 find . -type f \( -name "*.sh" -o -name "up" -o -name "run*" \) -exec dos2unix {} \;
+find ./src/helper_scripts -type f  -exec dos2unix {} \;
 find . -type f  | xargs git update-index --chmod=+x

docker/src/helper_scripts/lastbackup

@@ -0,0 +1,12 @@
+#!/usr/bin/with-contenv bash
+# shellcheck shell=bash
+
+lastrunfile="/tmp/pbs_client_lastrun"
+
+# First run touches the file. Backups will set the date.
+#  -s checks if the file exists and is not empty.
+if [ -s "$lastrunfile" ]; then
+    cat "$lastrunfile"
+else
+    echo "The first backup since container start has not happened yet."
+fi

docker/src/s6-services/backup/run_include

@@ -67,6 +67,9 @@ if [ "$CRON_BACKUP_ONLY" = "0" ] || [ -e "${lastrunfile}" ]; then
     ${BACKUPCMD} 2>&1
     BACKUP_EXIT_CODE=$?
 
+    # First run touches the file. Backups will set the date.
+    echo "$(date +"%Y-%m-%d %H:%M:%S")" > "${lastrunfile}"
+
     if [ -n "$HEALTHCHECKSURL" ]; then
         # We pipe the exit code to healthchecks, if it isn't zero, a warning will fire.
         curl -fsS -m 10 --retry 5 ${HEALTHCHECKSURL}/${BACKUP_EXIT_CODE}
@@ -79,4 +82,5 @@ fi
 
 # Set this so backups always happen after the first run via CRON given logic above.
 # The date may also be useful for something like a health check if I write it...
-echo "$(date +"%Y-%m-%d %H:%M:%S")" > /tmp/pbs_client_lastrun
+# First run touches the file. Backups will set the date.
+touch "${lastrunfile}"