- 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."
+ echo "$0"" Version:""$SCRIPT_VERSION" >> "$DIR_TMP/VERSION" && vbm "DEBUG:VERSION created.";
+ ## Check if PATHOUT_TAR already exists.
+ if [[ -f "$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