From: Steven Baltakatei Sandoval <baltakatei@gmail.com>
Date: Wed, 1 Jul 2020 18:44:52 +0000 (+0000)
Subject: feat(bkgpslog): Append to daily tar
X-Git-Url: https://zdv2.bktei.com/gitweb/EVA-2020-02.git/commitdiff_plain/6c30388ff903fe9c9f2c31ced53f1f7003031fac?hp=--cc

feat(bkgpslog): Append to daily tar

* Set version to 0.1.0.

* Rewrote write loop to append location data to tar file instead of
writing each file written by each buffer round directly to
disk. Tar contains individually encrypted and compressed files; no
attempt at merging location data between buffer rounds was attempted.

* Add functions:

- setTimeZoneEV (exports TZ)
- dateShort (returns current date in `YYYYmmdd` format via stdout)
- timeDuration (given seconds, returns ISO-8601 period; Ex: PT60S)
- displayMissing (displays missing apps, files, and dirs)
- setScriptTTL (sets script TTL given "day" or "hour")

* Set default script TTL to "day" (was "hour")

* Set default TZ to UTC. Added option `--time-zone`.
---

6c30388ff903fe9c9f2c31ced53f1f7003031fac
diff --git a/exec/bkgpslog b/exec/bkgpslog
index 724b6e9..9210e15 100755
--- a/exec/bkgpslog
+++ b/exec/bkgpslog
@@ -5,11 +5,15 @@
 # Usage: bkgpslog --output [output dir]
 
 #==BEGIN Define script parameters==
+## Logging Behavior parameters
+BUFFER_TTL="60"; # time between file writes
+SCRIPT_TTL="day"; # (day|hour)
+TZ="UTC"; export TZ; # Default time zone; overridden by '--time-zone=[str]' option
+
 PATH="$HOME/.local/bin:$PATH"   # Add "$(systemd-path user-binaries)" path in case apps saved there
 SCRIPT_HOSTNAME=$(hostname)     # Save hostname of system running this script.
-SCRIPT_VERSION="bkgpslog 0.0.1" # Define version of script.
-SCRIPT_TIME_SHORT="$(date +%Y%m%dT%H%M%S%z)" # Save current date & time in ISO-8601 format.
-SCRIPT_DATE_SHORT="$(date +%Y%m%d)"          # Save current date in ISO-8601 format.
+SCRIPT_VERSION="bkgpslog 0.1.0" # Define version of script.
+DIR_TMP="/dev/shm/$(timeStart)..bkgpslog"     # Define working directory for temproary files
 
 declare -Ag appRollCall # Associative array for storing app status
 declare -Ag fileRollCall # Associative array for storing file status
@@ -193,16 +197,56 @@ processArguments() {
 	    -h | --help) showUsage; exit 1;; # Display usage.
 	    --version) showVersion; exit 1;; # Show version
 	    -v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode.
-	    -o | --output) if [ -d "$2" ]; then DIROUT="$2"; vbm "DEBUG:DIROUT:$DIROUT"; shift; fi ;; # Define output directory.
+	    -o | --output) if [ -d "$2" ]; then DIR_OUT="$2"; vbm "DEBUG:DIR_OUT:$DIR_OUT"; shift; fi ;; # Define output directory.
 	    -e | --encrypt) OPTION_ENCRYPT="true"; vbm "DEBUG:Encrypted output mode enabled.";;
 	    -r | --recipient) # Add 'age' recipient via public key string
 		recPubKeys+=("$2"); vbm "pubkey added:""$2"; shift;;
 	    -c | --compress) OPTION_COMPRESS="true"; vbm "DEBUG:Compressed output mode enabled.";;
+	    -z | --time-zone) try setTimeZoneEV "$1";;
 	    *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options.
 	esac
 	shift
     done
 } # Argument Processing
+setTimeZoneEV(){
+    # Desc: Set time zone environment variable TZ
+    # Usage: setTimeZoneEV arg1
+    # Input: arg1: 'date'-compatible timezone string (ex: "America/New_York")
+    #        TZDIR env var (optional; default: "/usr/share/zoneinfo")
+    # Output: exports TZ
+    #         exit code 0 on success
+    #         exit code 1 on incorrect number of arguments
+    #         exit code 2 if unable to validate arg1
+    # Depends: yell, printenv, bash 5
+    # Tested on: Debian 10
+    ARG1="$1"
+    local tzDir returnState
+    if ! [[ $# -eq 1 ]]; then
+	yell "ERROR:Invalid argument count.";
+	return 1;
+    fi
+
+    # Read TZDIR env var if available
+    if printenv TZDIR 1>/dev/null 2>&1; then
+	tzDir="$(printenv TZDIR)";
+    else
+	tzDir="/usr/share/zoneinfo";
+    fi
+    
+    # Validate TZ string
+    if ! [[ -f "$tzDir"/"$ARG1" ]]; then
+	yell "ERROR:Invalid time zone argument.";
+	return 2;
+    else
+    # Export ARG1 as TZ environment variable
+	TZ="$ARG1" && export TZ && returnState="true";
+    fi
+
+    # Determine function return code
+    if [ "$returnState" = "true" ]; then
+	return 0;
+    fi
+} # Exports TZ environment variable
 timeUntilNextDay(){
     # Desc: Report seconds until next day.
     # Output: stdout: integer seconds until next day
@@ -273,9 +317,292 @@ dateTimeShort(){
     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
     TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"; # Produce separator-less current timestamp with resolution 1 second.
     echo "$TIME_CURRENT_SHORT";
-} # Get date&time without separators
+} # Get YYYYmmddTHHMMSS±zzzz
+dateShort(){
+    # Desc: Date without separators (YYYYmmdd)
+    # Usage: dateShort
+    # Output: stdout: date (ISO-8601, no separators)
+    local TIME_CURRENT DATE_CURRENT_SHORT
+    TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
+    DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day.
+    echo "$DATE_CURRENT_SHORT";
+} # Get YYYYmmdd
+timeDuration(){
+    # Desc: Output approximate time duration string before given time (default:current date)
+    # Ref/Attrib: ISO-8601:2004(E), §4.4.4.2 Representations of time intervals by duration and context information
+    # Note: "1 month" ("P1M") is assumed to be "30 days" (see ISO-8601:2004(E), §2.2.1.2)
+    # Usage: timeDuration [arg1] ([arg2])
+    # Input: arg1: seconds as base 10 integer >= 0  (ex: 3601)
+    #        arg2: precision level (optional; default=2)
+    # Output: stdout: ISO-8601 duration string (ex: "P1H1S", "P2Y10M15DT10H30M20S")
+    # Example: 'timeDuration 111111 3' yields 'P1DT6H51M'
+    # Depends: date 8 (gnucoreutils)
+    local returnState fullHours fullMinutes fullSeconds;
+    ARG1="$1";
+    ARG2="$2";
+    precision=2; # set default precision
+    returnState="true"; # set default return state
+
+    # Check that between one and two arguments is supplied
+    if ! { [[ $# -ge 1 ]] && [[ $# -le 2 ]]; }; then
+	yell "ERROR:Invalid number of arguments:$# . Exiting.";
+	returnState="ERROR_INPUT"; fi
+
+    # Check that arg1 provided
+    if [[ $# -ge 1 ]]; then
+	# Check that arg1 is a positive integer
+	if [[ "$ARG1" =~ ^[[:digit:]]+$ ]]; then
+   	    arg1Valid="true";
+	else
+	    yell "ERROR:ARG1 not a digit.";
+	    returnState="ERROR_INPUT";
+	    arg1Valid="false";
+	fi
+    else
+	yell "ERROR:No argument provided. Exiting.";
+	exit 1;
+    fi
+
+    # Consider whether arg2 was provided
+    if  [[ $# -eq 2 ]]; then
+	# Check that the second arg is a positive integer
+	if [[ "$ARG2" =~ ^[[:digit:]]+$ ]] && [[ "ARG2" -gt 0 ]]; then
+	arg2Valid="true";
+	precision="$ARG2";
+	else
+	    yell "ERROR:ARG2 not a positive integer. (is $ARG2 ). Leaving early.";
+	    returnState="ERROR_INPUT";
+	    arg2Valid="false";
+	fi;
+    else
+	arg2Valid="false";
+    fi;
+    
+    remainder="$ARG1" ; # seconds
+    ## Calculate full years Y, update remainder
+    fullYears=$(( remainder / (365*24*60*60) ));
+    remainder=$(( remainder - (fullYears*365*24*60*60) ));
+    ## Calculate full months M, update remainder
+    fullMonths=$(( remainder / (30*24*60*60) ));
+    remainder=$(( remainder - (fullMonths*30*24*60*60) ));
+    ## Calculate full days D, update remainder
+    fullDays=$(( remainder / (24*60*60) ));
+    remainder=$(( remainder - (fullDays*24*60*60) ));
+    ## Calculate full hours H, update remainder
+    fullHours=$(( remainder / (60*60) ));
+    remainder=$(( remainder - (fullHours*60*60) ));
+    ## Calculate full minutes M, update remainder
+    fullMinutes=$(( remainder / (60) ));
+    remainder=$(( remainder - (fullMinutes*60) ));
+    ## Calculate full seconds S, update remainder
+    fullSeconds=$(( remainder / (1) ));
+    remainder=$(( remainder - (remainder*1) ));
+    ## Check which fields filled
+    if [[ $fullYears -gt 0 ]]; then hasYears="true"; else hasYears="false"; fi
+    if [[ $fullMonths -gt 0 ]]; then hasMonths="true"; else hasMonths="false"; fi
+    if [[ $fullDays -gt 0 ]]; then hasDays="true"; else hasDays="false"; fi
+    if [[ $fullHours -gt 0 ]]; then hasHours="true"; else hasHours="false"; fi
+    if [[ $fullMinutes -gt 0 ]]; then hasMinutes="true"; else hasMinutes="false"; fi
+    if [[ $fullSeconds -gt 0 ]]; then hasSeconds="true"; else hasSeconds="false"; fi
+    
+    ## Determine which fields to display (see ISO-8601:2004 §4.4.3.2)
+    witherPrecision="false"
+    
+    ### Years
+    if $hasYears && [[ $precision -gt 0 ]]; then
+	displayYears="true";
+	witherPrecision="true";
+    else
+	displayYears="false";
+    fi;
+    if $witherPrecision; then ((precision--)); fi;
+    
+    ### Months
+    if $hasMonths && [[ $precision -gt 0 ]]; then
+	displayMonths="true";
+	witherPrecision="true";
+    else
+	displayMonths="false";
+    fi;
+    if $witherPrecision && [[ $precision -gt 0 ]]; then
+	displayMonths="true";
+    fi;
+    if $witherPrecision; then ((precision--)); fi;
+
+    ### Days
+    if $hasDays && [[ $precision -gt 0 ]]; then
+	displayDays="true";
+	witherPrecision="true";
+    else
+	displayDays="false";
+    fi;
+    if $witherPrecision && [[ $precision -gt 0 ]]; then
+	displayDays="true";
+    fi;
+    if $witherPrecision; then ((precision--)); fi;
+
+    ### Hours
+    if $hasHours && [[ $precision -gt 0 ]]; then
+	displayHours="true";
+	witherPrecision="true";
+    else
+	displayHours="false";
+    fi;
+    if $witherPrecision && [[ $precision -gt 0 ]]; then
+	displayHours="true";
+    fi;
+    if $witherPrecision; then ((precision--)); fi;
+
+    ### Minutes
+    if $hasMinutes && [[ $precision -gt 0 ]]; then
+	displayMinutes="true";
+	witherPrecision="true";
+    else
+	displayMinutes="false";
+    fi;
+    if $witherPrecision && [[ $precision -gt 0 ]]; then
+	displayMinutes="true";
+    fi;
+    if $witherPrecision; then ((precision--)); fi;
+
+    ### Seconds
+
+    if $hasSeconds && [[ $precision -gt 0 ]]; then
+	displaySeconds="true";
+	witherPrecision="true";
+    else
+	displaySeconds="false";
+    fi;
+    if $witherPrecision && [[ $precision -gt 0 ]]; then
+	displaySeconds="true";
+    fi;
+    if $witherPrecision; then ((precision--)); fi;
+
+
+
+    ## Determine whether or not the "T" separator is needed to separate date and time elements
+    if ( $displayHours || $displayMinutes || $displaySeconds); then
+	displayDateTime="true"; else displayDateTime="false"; fi
+    
+    ## Construct duration output string
+    OUTPUT="P"
+    if $displayYears; then
+	OUTPUT=$OUTPUT$fullYears"Y"; fi
+    if $displayMonths; then
+	OUTPUT=$OUTPUT$fullMonths"M"; fi
+    if $displayDays; then
+	OUTPUT=$OUTPUT$fullDays"D"; fi
+    if $displayDateTime; then
+	OUTPUT=$OUTPUT"T"; fi
+    if $displayHours; then
+	OUTPUT=$OUTPUT$fullHours"H"; fi
+    if $displayMinutes; then
+	OUTPUT=$OUTPUT$fullMinutes"M"; fi
+    if $displaySeconds; then
+	OUTPUT=$OUTPUT$fullSeconds"S"; fi
+
+    ## Output duration string to stdout
+    if [[ "$returnState" = "true" ]]; then echo "$OUTPUT"; fi
+
+    #===Determine function return code===
+    if [ "$returnState" = "true" ]; then
+	return 0;
+    else
+	echo "$returnState" 1>&2;
+	return 1;
+    fi
+
+} # Get duration (ex: PT10M4S )
+displayMissing() {
+    # Desc: Displays missing apps, files, and dirs
+    # Usage: displayMissing
+    # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
+    # Output: stderr messages
+    #==BEGIN Display errors==
+    #===BEGIN Display Missing Apps===
+    missingApps="Missing apps  :"
+    #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
+    for key in "${!appRollCall[@]}"; do
+	value="${appRollCall[$key]}"
+	if [ "$value" = "false" ]; then
+	    #echo "DEBUG:Missing apps: $key => $value";
+	    missingApps="$missingApps""$key "
+	    appMissing="true"
+	fi
+    done
+    if [ "$appMissing" = "true" ]; then  # Only indicate if an app is missing.
+	echo "$missingApps" 1>&2;
+    fi
+    #===END Display Missing Apps===
+
+    #===BEGIN Display Missing Files===
+    missingFiles="Missing files:"
+    #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
+    for key in "${!fileRollCall[@]}"; do
+	value="${fileRollCall[$key]}"
+	if [ "$value" = "false" ]; then
+	    #echo "DEBUG:Missing files: $key => $value";
+	    missingFiles="$missingFiles""$key "
+	    fileMissing="true"
+	fi
+    done
+    if [ "$fileMissing" = "true" ]; then  # Only indicate if an app is missing.
+	echo "$missingFiles" 1>&2;
+    fi
+    #===END Display Missing Files===
+
+    #===BEGIN Display Missing Directories===
+    missingDirs="Missing dirs:"
+    #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
+    for key in "${!dirRollCall[@]}"; do
+	value="${dirRollCall[$key]}"
+	if [ "$value" = "false" ]; then
+	    #echo "DEBUG:Missing dirs: $key => $value";
+	    missingDirs="$missingDirs""$key "
+	    dirMissing="true"
+	fi
+    done
+    if [ "$dirMissing" = "true" ]; then  # Only indicate if an dir is missing.
+	echo "$missingDirs" 1>&2;
+    fi
+    #===END Display Missing Directories===
+
+    #==END Display errors==
+} # Display missing apps, files, dirs
+setScriptTTL() {
+    #Desc: Sets script TTL
+    #Usage: setScriptTTL arg1
+    #Input: arg1: "day" or "hour"
+    #Output: scriptTTL
+    #Depends: timeUntilNextHour or timeUntilNextDay
+    local ARG1
+    ARG1="$1"
+    if [[ "$ARG1" = "day" ]]; then
+	    # Set script lifespan to end at start of next day
+	if ! scriptTTL="$(timeUntilNextDay)"; then
+	    if [[ "$scriptTTL" -eq 0 ]]; then
+	    ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
+	    else
+	    yell "ERROR: timeUntilNextDay exit code $?"; exit 1;
+	    fi;
+	fi;
+    elif [[ "$ARG1" = "hour" ]]; then
+	# Set script lifespan to end at start of next hour
+	if ! scriptTTL="$(timeUntilNextHour)"; then
+	    if [[ "$scriptTTL" -eq 0 ]]; then
+		((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
+	    else
+		yell "ERROR: timeUntilNextHour exit code $?"; exit 1;
+	    fi;
+	fi;
+    else
+	yell "ERROR:Invalid argument for setScriptTTL function."; exit 1;
+    fi
+} # Seconds until next (day|hour).
 main() {
     processArguments "$@" # Process arguments.
+
+    # Set output encryption and compression option strings
     if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active.
 	if checkapp age; then # Check that age is available.
 	    for pubkey in "${recPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
@@ -301,7 +628,6 @@ main() {
 	CMD_ENCRYPT_SUFFIX="";
 	vbm "DEBUG:Encryption not enabled."
     fi
-
     if [[ "$OPTION_COMPRESS" = "true" ]]; then # Check if compression option active
 	if checkapp gzip; then # Check if gzip available
 	    CMD_COMPRESS="gzip ";
@@ -314,55 +640,68 @@ main() {
 	CMD_COMPRESS_SUFFIX="";
 	vbm "DEBUG:Compression not enabled."
     fi
-    
-    
-    if checkapp gpspipe && checkdir "$DIROUT"; then
-	
-	# # Set script lifespan to end at start of next day
-	# if ! scriptTTL="$(timeUntilNextDay)"; then
-	#     if [[ "$scriptTTL" -eq 0 ]]; then
-	# 	((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
-	#     else
-	# 	yell "ERROR: timeUntilNextDay exit code $?"; exit 1;
-	#     fi;
-	# fi;
 
-	# Set script lifespan to end at start of next hour
-	if ! scriptTTL="$(timeUntilNextHour)"; then
-	    if [[ "$scriptTTL" -eq 0 ]]; then
-		((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
-	    else
-		yell "ERROR: timeUntilNextHour exit code $?"; exit 1;
-	    fi;
-	fi;
-        
-	# Determine buffer lifespan
-	bufferTTL="60";
-
-	# Record gps data until script lifespan ends
-	declare debugCounter; debugCounter="0"
-	while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
-	    ((debugCounter++))
-      	    # Determine output file paths (time is start of buffer period)
-	    FILEOUT_BASENAME="$(dateTimeShort)""--P""$bufferTTL""S..""$SCRIPT_HOSTNAME""_location" ; # ISO-8601 YYYYmmddTHHMMSS+zzP[$bufferTTL]S
-	    FILEOUT_NMEA="$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
-	    FILEOUT_GPX="$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
-	    FILEOUT_KML="$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
-	    # Define GPS conversion commands
-	    CMD_CONV_NMEA="tee /dev/null "
-	    CMD_CONV_GPX="gpsbabel -i nmea -f - -o gpx -F - "
-	    CMD_CONV_KML="gpsbabel -i nmea -f - -o kml -F - "
-	    # Fill buffer
-	    buffer="$(timeout "$bufferTTL""s" gpspipe -r)"; # Record gpspipe nmea data to buffer for bufferTTL seconds
-	    # Execute processing and save command string
-	    echo "$buffer" | $CMD_CONV_NMEA | $CMD_COMPRESS | $CMD_ENCRYPT > "$DIROUT"/"$FILEOUT_NMEA" & # Save NMEA format
-	    echo "$buffer" | $CMD_CONV_GPX  | $CMD_COMPRESS | $CMD_ENCRYPT > "$DIROUT"/"$FILEOUT_GPX" & # Save GPX format
-	    echo "$buffer" | $CMD_CONV_KML  | $CMD_COMPRESS | $CMD_ENCRYPT > "$DIROUT"/"$FILEOUT_KML" & # Save KML format
-	    vbm "DEBUG:Completed buffer session $debugCounter ." 1>&2;
-	    # Reset buffer and filenames
-	    unset buffer FILEOUT_BASENAME FILEOUT_NMEA FILEOUT_GPX FILEOUT_KML;
-	done
-    fi
+    # Check that critical apps and dirs are available, displag missing ones.
+    if ! checkapp gpspipe tar && ! checkdir "$DIR_OUT" "/dev/shm"; then
+	yell "ERROR:Critical components missing.";
+	displayMissing; yell "Exiting."; exit 1; fi
+
+    # Set script lifespan
+    setScriptTTL "$SCRIPT_TTL";
+
+    # File name substring: encoded bufferTTL
+    bufferTTL_STR="$(timeDuration $BUFFER_TTL)";
+
+    # Init temp working dir
+    try mkdir "$DIR_TMP" && vbm "DEBUG:Working dir creatd at:$DIR_TMP"
+
+    # Initialize 'tar' archive
+    ## Define output tar path (note: each day gets *one* tar file (Ex: "20200731..hostname_location.[.gpx.gz].tar"))
+    PATHOUT_TAR="$DIR_OUT"/"$(dateShort)".."$SCRIPT_HOSTNAME""_location""$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX".tar 
+    ## Write bkgpslog version to DIR_TMP/VERSION
+    echo "$0"" Version:""$SCRIPT_VERSION" >> "$DIR_TMP/VERSION" && vbm "DEBUG:VERSION created."
+    ## Create empty tar archive at PATHOUT_TAR
+    try tar --create --directory="$DIR_TMP" --file="$PATHOUT_TAR" --files-from=/dev/null && vbm "DEBUG:bufferRam.tar created."
+    ## Append VERSION file to PATHOUT_TAR
+    try tar --append --directory="$DIR_TMP" --file="$PATHOUT_TAR" "VERSION" && vbm "DEBUG:VERSION added to $PATHOUT_TAR"
+    
+    # Record gps data until script lifespan ends
+    declare debugCounter; debugCounter="0"; # set debug counter
+    timeStart=$(dateTimeShort); # Note start time
+    while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
+	# Determine file paths (time is start of buffer period)
+	FILEOUT_BASENAME="$timeStart""--""$bufferTTL_STR""..""$SCRIPT_HOSTNAME""_location" ; # ISO-8601 YYYYmmddTHHMMSS+zzP[$bufferTTL]S
+	## Files saved to tmpfs memory (DIR_TMP)
+	PATHOUT_NMEA="$DIR_TMP"/"$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ; 
+	PATHOUT_GPX="$DIR_TMP"/"$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
+	PATHOUT_KML="$DIR_TMP"/"$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
+	## Files saved to disk (DIR_OUT)
+	### one file per day (Ex: "20200731..hostname_location.[.gpx.gz].tar")
+	PATHOUT_TAR="$DIR_OUT"/"$(dateShort)".."$SCRIPT_HOSTNAME""_location""$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX".tar 
+	# Define GPS conversion commands
+	CMD_CONV_NMEA="tee /dev/null " ; # tee as passthrough
+	CMD_CONV_GPX="gpsbabel -i nmea -f - -o gpx -F - " ; # convert NMEA to GPX
+	CMD_CONV_KML="gpsbabel -i nmea -f - -o kml -F - " ; # convert NMEA to KML
+	# Fill Bash variable buffer
+	bufferBash="$(timeout "$BUFFER_TTL""s" gpspipe -r)"; # Record gpspipe nmea data to buffer for bufferTTL seconds
+	# Process bufferBash, save secured chunk set to DIR_TMP
+	echo "$bufferBash" | $CMD_CONV_NMEA | $CMD_COMPRESS | $CMD_ENCRYPT > "$PATHOUT_NMEA" & # Create NMEA file (secured if requested)
+	echo "$bufferBash" | $CMD_CONV_GPX  | $CMD_COMPRESS | $CMD_ENCRYPT > "$PATHOUT_GPX" & # Create GPX file (secured if requested)
+	echo "$bufferBash" | $CMD_CONV_KML  | $CMD_COMPRESS | $CMD_ENCRYPT > "$PATHOUT_KML" & # Create KML file (secured if requested)
+	vbm "DEBUG:Completed buffer session $debugCounter ." 1>&2;
+	# Append each secured chunk in memory dir (DIR_TMP) to file on disk (PATHOUT_TAR in DIR_OUT)
+	try tar --append --directory="$(dirname $"PATHOUT_NMEA")" --file="$PATHOUT_TAR" "$(basename "$PATHOUT_NMEA")" && \
+	    vbm "DEBUG:Appended NMEA location data $PATHOUT_NMEA to $PATHOUT_TAR";
+	try tar --append --directory="$(dirname $"PATHOUT_GPX")" --file="$PATHOUT_TAR" "$(basename "$PATHOUT_GPX")" && \
+	    vbm "DEBUG:Appended GPX location data $PATHOUT_GPX to $PATHOUT_TAR";
+	try tar --append --directory="$(dirname $"PATHOUT_KML")" --file="$PATHOUT_TAR" "$(basename "$PATHOUT_KML")" && \
+	    vbm "DEBUG:Appended KML location $PATHOUT_KML to $PATHOUT_TAR";
+	# Remove secured chunks from DIR_TMP
+	try rm "$PATHOUT_NMEA" "$PATHOUT_NMEA" "$PATHOUT_NMEA";
+	# Reset buffer and filenames
+	unset bufferBash FILEOUT_BASENAME PATHOUT_NMEA PATHOUT_GPX PATHOUT_KML PATHOUT_TAR;
+	((debugCounter++))
+    done
 } # Main function.
 #===END Declare local script functions===
 #==END Define script parameters==
@@ -372,7 +711,3 @@ main() {
 main "$@" # Run main function.
 exit 0;
 #==END Perform work and exit==
-
-
-    
-    #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;
diff --git a/exec/bkgpslog-plan.org b/exec/bkgpslog-plan.org
new file mode 100644
index 0000000..bc98f9a
--- /dev/null
+++ b/exec/bkgpslog-plan.org
@@ -0,0 +1,35 @@
+* bkgpslog narrative
+** Initialize environment
+*** Init variables
+**** Save timeStart (YYYYmmddTHHMMSS±zz)
+*** Define Functions
+**** Define Debugging functions
+**** Define Argument Processing function
+**** Define Main function
+** Run Main Function
+*** Process Arguments
+*** Set output encryption and compression option strings
+*** Check that critical apps and dirs are available, displag missing ones.
+*** Set lifespans of script and buffer
+*** Init temp working dir ~DIR_TMP~
+Make temporary dir in tmpfs dir: ~/dev/shm/$(nonce)..bkgpslog/~ (~DIR_TMP~)
+*** Initialize ~tar~ archive
+**** Write ~bkgpslog~ version to ~$DIR_TMP/VERSION~
+**** Create empty ~tar~ archive in ~DIR_OUT~ at ~PATHOUT_TAR~
+
+Set output file name to:
+: PATHOUT_TAR="$DIR_OUT/YYYYmmdd..hostname_location.gz.age.tar"
+Usage: ~iso8601Period $timeStart $timeEnd~ 
+
+**** Append ~VERSION~ file to ~PATHOUT_TAR~
+
+Append ~$DIR_TMP/VERSION~ to ~PATHOUT_TAR~ via ~tar --append~
+
+*** Read/Write Loop (Record gps data until script lifespan ends)
+**** Determine output file paths
+**** Define GPS conversion commands
+**** Fill Bash variable buffer from ~gpspipe~
+**** Process bufferBash, save secured chunk set to ~DIR_TMP~
+**** Append each secured chunk to ~PATHOUT_TAR~
+: tar --append --directory=DIR_TMP --file=PATHOUT_TAR $(basename PATHOUT_{NMEA,GPX,KML} )
+**** Remove secured chunk from ~DIR_TMP~