doc(location):Update README with compress and encrypt example

[EVA-2020-02.git] / exec / bkgpslog

diff --git a/exec/bkgpslog b/exec/bkgpslog
index 8d1829a73a4619c6ac086059dcf6ac24eb7d43d8..cb6900d041d95b08f286965c779ceae424ba3dd4 100755 (executable)
--- a/exec/bkgpslog
+++ b/exec/bkgpslog
@@ -14,6 +14,8 @@ SCRIPT_DATE_SHORT="$(date +%Y%m%d)"          # Save current date in ISO-8601 for
 declare -Ag appRollCall # Associative array for storing app status
 declare -Ag fileRollCall # Associative array for storing file status
 declare -Ag dirRollCall # Associative array for storing dir status
+declare -a recPubKeys # for processArguments function
+declare recipients # for main function
 
 #===BEGIN Declare local script functions===
 checkapp() {
@@ -140,8 +142,23 @@ showUsage() {
     echoerr "    -v, --verbose"
     echoerr "            Display debugging info."
     echoerr
+    echoerr "    -e, --encrypt"
+    echoerr "            Encrypt output."
+    echoerr
+    echoerr "    -r, --recipient [ pubkey string ]"
+    echoerr "            Specify recipient."
+    echoerr
     echoerr "    -o, --output [ directory ]"
     echoerr "            Specify output directory to save logs."
+    echoerr
+    echoerr "    -c, --compress"
+    echoerr "            Compress output with gzip (before encryption if enabled)."
+    echoerr
+    echoerr "EXAMPLE: (bash script lines)"
+    echoerr "/bin/bash bkgpslog -e -c \\"
+    echoerr "-r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \\"
+    echoerr "-r age1ala848kqrvxc88rzaauc6vc5v0fqrvef9dxyk79m0vjea3hagclswu0lgq \\"
+    echoerr "-o ~/Sync/Location"
 } # Display information on how to use this script.
 showVersion() {
     echoerr "$SCRIPT_VERSION"
@@ -177,6 +194,10 @@ processArguments() {
            --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.
+           -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:""$2"; shift;;
+           -c | --compress) OPTION_COMPRESS="true"; vbm "DEBUG:Compressed output mode enabled.";;
            *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options.
        esac
        shift
@@ -255,8 +276,48 @@ dateTimeShort(){
 } # Get date&time without separators
 main() {
     processArguments "$@" # Process arguments.
-    if checkapp gpspipe && checkdir "$DIROUT"; then
+    if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active.
+       if checkapp age; then # Check that age is available.
+           for pubkey in "${recPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
+               vbm "DEBUG:Testing pubkey string:$pubkey"
+               if echo "butts" | age -a -r "$pubkey" 1>/dev/null; then
+                   # Form age recipient string
+                   recipients="$recipients""-r $pubkey ";
+                   vbm "Added pubkey for forming age recipient string:""$pubkey";
+                   vbm "DEBUG:recipients:""$recipients";
+               else
+                   yell "ERROR:Exit code ""$?"". Invalid recipient pubkey string. Exiting."; exit 1;
+               fi
+           done
+           vbm "DEBUG:Finished processing recPubKeys array";
+           # Form age command string
+           CMD_ENCRYPT="age ""$recipients ";
+           CMD_ENCRYPT_SUFFIX=".age";
+       else
+           yell "ERROR:Encryption enabled but \"age\" not found. Exiting."; exit 1;
+       fi
+    else
+       CMD_ENCRYPT="tee /dev/null ";
+       CMD_ENCRYPT_SUFFIX="";
+       vbm "DEBUG:Encryption not enabled."
+    fi
 
+    if [[ "$OPTION_COMPRESS" = "true" ]]; then # Check if compression option active
+       if checkapp gzip; then # Check if gzip available
+           CMD_COMPRESS="gzip ";
+           CMD_COMPRESS_SUFFIX=".gz";
+       else
+           yell "ERROR:Compression enabled but \"gzip\" not found. Exiting."; exit 1;
+       fi
+    else
+       CMD_COMPRESS="tee /dev/null ";
+       CMD_COMPRESS_SUFFIX="";
+       vbm "DEBUG:Compression not enabled."
+    fi
+    
+    
+    if checkapp gpspipe && checkdir "$DIROUT"; then
+       
        # # Set script lifespan to end at start of next day
        # if ! scriptTTL="$(timeUntilNextDay)"; then
        #     if [[ "$scriptTTL" -eq 0 ]]; then
@@ -284,15 +345,19 @@ main() {
            ((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="$FILEOUT_BASENAME".nmea ;
-           FILEOUT_GPX="$FILEOUT_BASENAME".gpx ;
-           FILEOUT_KML="$FILEOUT_BASENAME".kml ;
+           FILEOUT_NMEA="$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
-           # Process and save buffers
-           echo "$buffer"                                     > "$DIROUT"/"$FILEOUT_NMEA" & # Save NMEA format
-           echo "$buffer" | gpsbabel -i nmea -f - -o gpx -F - > "$DIROUT"/"$FILEOUT_GPX"  & # Save GPX format
-           echo "$buffer" | gpsbabel -i nmea -f - -o kml -F - > "$DIROUT"/"$FILEOUT_KML"  & # Save KML format
+           # Execute processing and save command string
+           echo "$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;