feat(bkgpslog):Append to preexisting tar if possible

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

diff --git a/exec/bkgpslog b/exec/bkgpslog
index db2e6a4b5be3c88ce685bc5915cb45e35e4a7229..840a0c63a5fd928d73329d57b31a2464646894fa 100755 (executable)
--- a/exec/bkgpslog
+++ b/exec/bkgpslog
@@ -22,6 +22,9 @@ declare -Ag dirRollCall # Associative array for storing dir status
 declare -a recPubKeys # for processArguments function
 declare recipients # for main function
 
+## Initialize variables
+OPTION_VERBOSE=""; OPTION_ENCRYPT=""; OPTION_COMPRESS=""; OPTION_TMPDIR="";
+
 #===BEGIN Declare local script functions===
 checkapp() {
     # Desc: If arg is a command, save result in assoc array 'appRollCall'
@@ -151,7 +154,8 @@ showUsage() {
     echoerr "            Encrypt output."
     echoerr
     echoerr "    -r, --recipient [ pubkey string ]"
-    echoerr "            Specify recipient."
+    echoerr "            Specify recipient. May be age or ssh pubkey."
+    echoerr "            See https://github.com/FiloSottile/age"
     echoerr
     echoerr "    -o, --output [ directory ]"
     echoerr "            Specify output directory to save logs."
@@ -159,6 +163,13 @@ showUsage() {
     echoerr "    -c, --compress"
     echoerr "            Compress output with gzip (before encryption if enabled)."
     echoerr
+    echoerr "    -z, --time-zone"
+    echoerr "            Specify time zone. (ex: \"America/New_York\")"
+    echoerr
+    echoerr "    -t, --temp-dir"
+    echoerr "            Specify parent directory for temporary working directory."
+    echoerr "            Default: \"/dev/shm\""
+    echoerr
     echoerr "EXAMPLE: (bash script lines)"
     echoerr "/bin/bash bkgpslog -e -c \\"
     echoerr "-r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \\"
@@ -203,8 +214,9 @@ processArguments() {
            -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.
+           -z | --time-zone) try setTimeZoneEV "$2"; shift;;
+           -t | --temp-dir) OPTION_TMPDIR="true" && TMP_DIR_PRIORITY="$2"; shift;;
+           *) echoerr "ERROR: Unrecognized argument: $1"; echoerr "STATUS:All arguments:$*"; exit 1;; # Handle unrecognized options.
        esac
        shift
     done
@@ -602,18 +614,31 @@ setScriptTTL() {
 } # Seconds until next (day|hour).
 main() {
     processArguments "$@" # Process arguments.
-
+    
     # Determine working directory
+    ## Set DIR_TMP_PARENT to user-specified value if specified
+    if [[ "$OPTION_TMPDIR" = "true" ]]; then
+           if [[ -d "$TMP_DIR_PRIORITY" ]]; then
+           DIR_TMP_PARENT="$OPTION_TMPDIR"; 
+       else
+           yell "WARNING:Specified temporary working directory not valid:$OPTION_TMP_DIR";
+           exit 1;
+       fi
+    fi
+
+    ## Set DIR_TMP_PARENT to default or fallback otherwise
     if [[ -d "$DIR_TMP_DEFAULT" ]]; then
-       DIR_TMP_BASE="$DIR_TMP_DEFAULT"; # Use default working directory parent (ex: '/dev/shm')
-    #### elif [[ -d /tmp ]]; then
-    ####       yell "WARNING:/dev/shm not available. Falling back to /tmp .";
-    ####       DIR_TMP_BASE="/tmp";
+       DIR_TMP_PARENT="$DIR_TMP_DEFAULT";
+    elif [[ -d /tmp ]]; then
+       yell "WARNING:/dev/shm not available. Falling back to /tmp .";
+       DIR_TMP_PARENT="/tmp";
     else
        yell "ERROR:No valid working directory available. Exiting.";
        exit 1;
     fi
-    DIR_TMP="$DIR_TMP_BASE"/"$SCRIPT_TIME_START""..bkgpslog";     # Define working directory for temproary files
+
+    ## Set DIR_TMP using DIR_TMP_PARENT and nonce (SCRIPT_TIME_START)
+    DIR_TMP="$DIR_TMP_PARENT"/"$SCRIPT_TIME_START""..bkgpslog"; # Note: removed at end of main().
     
     # Set output encryption and compression option strings
     if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active.
@@ -673,8 +698,19 @@ main() {
     PATHOUT_TAR="$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="$PATHOUT_TAR" --files-from=/dev/null && vbm "DEBUG:""$PATHOUT_TAR"" created."
+    ## Check if PATHOUT_TAR already exists.
+    if [[ -f "$PATHOUT_TAR" ]]; then
+       ### Check if preexisting tar is appendable.
+       PATHOUT_APPENDTEST="$DIR_TMP"/"$(dateTimeShort)..append_test.txt"
+       echo "$(dateTimeShort)" >> "$PATHOUT_APPENDTEST"; && vbm "DEBUG:""$PATHOUT_APPENDTEST"" created."
+       if ! tar --append --directory="$DIR_TMP" --file="$PATHOUT_TAR" "$(basename "$PATHOUT_APPENDTEST")"; then
+           ### If not appendable, label tar broken, move tar, proceed.
+           mv "$PATHOUT_TAR" "${PATHOUT_TAR%.*}""-broken$(dateTimeShort)".tar
+       fi
+    else
+       ### If (no preexisting|appendable) tar found, create empty tar archive at PATHOUT_TAR
+       try tar --create --directory="$DIR_TMP" --file="$PATHOUT_TAR" --files-from=/dev/null && vbm "DEBUG:""$PATHOUT_TAR"" created."
+    fi 
     ## Append VERSION file to PATHOUT_TAR
     try tar --append --directory="$DIR_TMP" --file="$PATHOUT_TAR" "VERSION" && vbm "DEBUG:VERSION added to $PATHOUT_TAR"
     
@@ -715,6 +751,9 @@ main() {
        unset bufferBash FILEOUT_BASENAME PATHOUT_NMEA PATHOUT_GPX PATHOUT_KML PATHOUT_TAR;
        ((debugCounter++))
     done
+
+    # Remove DIR_TMP
+    try rm -r "$DIR_TMP";
 } # Main function.
 #===END Declare local script functions===
 #==END Define script parameters==