yell "ERROR:Invalid argument for setScriptTTL function."; exit 1;
fi
} # Seconds until next (day|hour).
+checkMakeTar() {
+ # Desc: Checks that a valid tar archive exists, creates one otherwise
+ # Usage: checkMakeTar [ path ]
+ # Version: 1.0.1
+ # Input: arg1: path of tar archive
+ # Output: exit code 0 : tar readable
+ # exit code 1 : tar missing; created
+ # exit code 2 : tar not readable; moved; replaced
+ # Depends: try, tar, date
+ local PATH_TAR returnFlag0 returnFlag1 returnFlag2
+ PATH_TAR="$1"
+
+ # Check if file is a valid tar archive
+ if tar --list --file="$PATH_TAR" 1>/dev/null 2>&1; then
+ ## T1: return success
+ returnFlag0="tar valid";
+ else
+ ## F1: Check if file exists
+ if [[ -f "$PATH_TAR" ]]; then
+ ### T: Rename file
+ try mv "$PATH_TAR" "$PATH_TAR""--broken--""$(date +%Y%m%dT%H%M%S)" && \
+ returnFlag1="tar moved";
+ else
+ ### F: -
+ :
+ fi
+ ## F2: Create tar archive, return 0
+ try tar --create --file="$PATH_TAR" --files-from=/dev/null && \
+ returnFlag2="tar created";
+ fi
+
+ # Determine function return code
+ if [[ "$returnFlag0" = "tar valid" ]]; then
+ return 0;
+ elif [[ "$returnFlag2" = "tar created" ]] && ! [[ "$returnFlag1" = "tar moved" ]]; then
+ return 1; # tar missing so created
+ elif [[ "$returnFlag2" = "tar created" ]] && [[ "$returnFlag1" = "tar moved" ]]; then
+ return 2; # tar not readable so moved; replaced
+ fi
+} # checks if arg1 is tar; creates one otherwise
appendArgTar(){
# Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
# Usage: writeArg "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
} # Append Bash var to file appended to Tar archive
magicWriteBuffer() {
# Desc: bkgpslog-specific meta function for writing data to DIR_TMP then appending each file to PATHOUT_TAR
+ # Inputs: PATHOUT_TAR FILEOUT_{NMEA,GPX,KML} CMD_CONV_{NMEA,GPX,KML} CMD_{COMPRESS,ENCRYPT} DIR_TMP
+ # Depends: yell, try, vbm, appendArgTar, tar
local FN="${FUNCNAME[0]}";
wait; # Wait to avoid collision with older magicWriteBuffer() instances (see https://www.tldp.org/LDP/abs/html/x9644.html )
- yell "DEBUG:STATUS:$FN:Started magicWriteBuffer().";
+ vbm "DEBUG:STATUS:$FN:Started magicWriteBuffer().";
+
+ # Check that PATHOUT_TAR is a tar. Rename old and create empty one otherwise.
+ checkMakeTar "$PATHOUT_TAR"
+
+ # Write bufferBash to PATHOUT_TAR
appendArgTar "$bufferBash" "$FILEOUT_NMEA" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_NMEA" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write NMEA data
appendArgTar "$bufferBash" "$FILEOUT_GPX" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_GPX" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write GPX file
appendArgTar "$bufferBash" "$FILEOUT_KML" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_KML" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write KML file
## 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""$CMD_ENCRYPT_SUFFIX".tar && \
vbm "STATUS:Set PATHOUT_TAR to:$PATHOUT_TAR";
- ## Write bkgpslog version to DIR_TMP/VERSION
+ ## Generate VERSION file
FILEOUT_VERSION="$(dateTimeShort)..VERSION";
PATHOUT_VERSION="$DIR_TMP"/"$FILEOUT_VERSION";
echo "$(dateTimeShort):$(basename "$0")"" Version:""$SCRIPT_VERSION" >> "$PATHOUT_VERSION" && vbm "DEBUG:VERSION created:$PATHOUT_VERSION";
- ## Check if PATHOUT_TAR already exists.
- if [[ -f "$PATHOUT_TAR" ]]; then
- vbm "STATUS:Output tar already exists:$PATHOUT_TAR";
- ### Check if preexisting tar is appendable.
- FILEOUT_APPENDTEST="$(dateTimeShort)..RESUMING_LOGGING_SESSION.txt";
- PATHOUT_APPENDTEST="$DIR_TMP"/"$FILEOUT_APPENDTEST" && \
- vbm "DEBUG:Set PATHOUT_APPENDTEST to:$PATHOUT_APPENDTEST";
- echo "$(dateTimeShort):""$(basename "$0")"" version $SCRIPT_VERSION resuming logging session." >> "$PATHOUT_APPENDTEST" && \
- vbm "DEBUG:""$PATHOUT_APPENDTEST"" created.";
- if ! tar --append --directory="$DIR_TMP" --file="$PATHOUT_TAR" "$FILEOUT_APPENDTEST"; then
- ### If not appendable, label tar broken, move tar, proceed.
- mv "$PATHOUT_TAR" "${PATHOUT_TAR%.*}""-broken$(dateTimeShort)".tar && \
- vbm "DEBUG:tar not writable, moving out of the way $PATHOUT_TAR";
- fi
- else
- vbm "STATUS:Output tar does not already exist. Creating:$PATHOUT_TAR";
- ### 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:Empty tar created at:$PATHOUT_TAR";
- fi
+
+ ## Check that PATHOUT_TAR is a tar. Rename old and create empty one otherwise.
+ checkMakeTar "$PATHOUT_TAR" && vbm "DEBUG:Confirmed or Created to be a tar:$PATHOUT_TAR";
+
## Append VERSION file to PATHOUT_TAR
try tar --append --directory="$DIR_TMP" --file="$PATHOUT_TAR" "$FILEOUT_VERSION" && \
vbm "DEBUG:VERSION added to $PATHOUT_TAR";