From: Steven Baltakatei Sandoval Date: Fri, 3 Jul 2020 19:49:50 +0000 (+0000) Subject: fix(bkgpslog):Reduce logging downtime between buffer rounds X-Git-Url: https://zdv2.bktei.com/gitweb/EVA-2020-02.git/commitdiff_plain/e47e80485f3c3192111ecf88bb09ae5d192cc208?ds=sidebyside fix(bkgpslog):Reduce logging downtime between buffer rounds Reduce logging downtime between buffer rounds by moving commands into the asynchronous `magicWriteBuffer()` function that is spun off immediately after `gpspipe` has collected data. Add functionality to `dateTimeShort()` and `dateShort` so the start time of each saved chunk appended to the `tar` archive can be calculated indirectly from when `magicWriteBuffer()` starts rather than performing slow `date` and associated bash variable changes in the main loop. This start time is needed to name each inserted file as well as to identify which `tar` file to insert into. Save gpspipe buffer data `/dev/shm` instead of a Bash variable. Add `appendFileTar()` function to facilitate reading and processing of buffer data from `/dev/shm`. --- diff --git a/exec/bkgpslog b/exec/bkgpslog index 720f59e..c40175f 100755 --- a/exec/bkgpslog +++ b/exec/bkgpslog @@ -14,7 +14,7 @@ DIR_TMP_DEFAULT="/dev/shm"; # Default parent of working directory SCRIPT_TIME_START=$(date +%Y%m%dT%H%M%S.%N); PATH="$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="0.3.2"; # Define version of script. +SCRIPT_VERSION="0.3.3"; # Define version of script. SCRIPT_NAME="bkgpslog"; # Define basename of script file. SCRIPT_URL="https://gitlab.com/baltakatei/ninfacyzga-01"; # Define wesite hosting this script. AGE_VERSION="1.0.0-beta2"; # Define version of age (encryption program) @@ -334,20 +334,64 @@ timeUntilNextHour(){ } # Report seconds until next hour dateTimeShort(){ # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz) - # Usage: dateTimeShort + # Usage: dateTimeShort ([str date]) + # Version 1.1.0 + # Input: arg1: 'date'-parsable timestamp string (optional) # Output: stdout: timestamp (ISO-8601, no separators) + # Depends: yell local TIME_CURRENT TIME_CURRENT_SHORT + + argTime="$1"; + # Get Current Time TIME_CURRENT="$(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. + # Decide to parse current or supplied date + ## Check if time argument empty + if [[ -z "$argTime" ]]; then + ## T: Time argument empty, use current time + TIME_INPUT="$TIME_CURRENT"; + else + ## F: Time argument exists, validate time + if date --date="$argTime" 1>/dev/null 2>&1; then + ### T: Time argument is valid; use it + TIME_INPUT="$argTime"; + else + ### F: Time argument not valid; exit + yell "ERROR:Invalid time argument supplied. Exiting."; exit 1; + fi + fi + # Construct and deliver separator-les date string + TIME_CURRENT_SHORT="$(date -d "$TIME_INPUT" +%Y%m%dT%H%M%S%z)"; echo "$TIME_CURRENT_SHORT"; } # Get YYYYmmddTHHMMSS±zzzz dateShort(){ # Desc: Date without separators (YYYYmmdd) - # Usage: dateShort + # Usage: dateShort ([str date]) + # Version: 1.1.0 + # Input: arg1: 'date'-parsable timestamp string (optional) # Output: stdout: date (ISO-8601, no separators) + # Depends: yell local TIME_CURRENT DATE_CURRENT_SHORT + + argTime="$1"; + # Get Current Time TIME_CURRENT="$(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. + # Decide to parse current or supplied date + ## Check if time argument empty + if [[ -z "$argTime" ]]; then + ## T: Time argument empty, use current time + TIME_INPUT="$TIME_CURRENT"; + else + ## F: Time argument exists, validate time + if date --date="$argTime" 1>/dev/null 2>&1; then + ### T: Time argument is valid; use it + TIME_INPUT="$argTime"; + else + ### F: Time argument not valid; exit + yell "ERROR:Invalid time argument supplied. Exiting."; exit 1; + fi + fi + # Construct and deliver separator-les date string + DATE_CURRENT_SHORT="$(date -d "$TIME_INPUT" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day. echo "$DATE_CURRENT_SHORT"; } # Get YYYYmmdd timeDuration(){ @@ -669,8 +713,8 @@ checkMakeTar() { } # checks if arg1 is tar; creates one otherwise appendArgTar(){ # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar - # Usage: writeArg "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...) - # Version: 1.0.0 + # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...) + # Version: 1.0.2 # Input: arg1: data to be written # arg2: file name of file to be inserted into tar # arg3: tar archive path (must exist first) @@ -718,6 +762,53 @@ appendArgTar(){ try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME"; #yell "DEBUG:STATUS:$FN:Finished appendArgTar()." } # Append Bash var to file appended to Tar archive +appendFileTar(){ + # Desc: Processes first file and then appends to tar + # Usage: appendFileTar [file path] [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...) + # Version: 1.0.1 + # Input: arg1: path of file to be (processed and) written + # arg2: name to use for file inserted into tar + # arg3: tar archive path (must exist first) + # arg4: temporary working dir + # arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ") + # Output: file written to disk + # Example: decrypt multiple large files in parallel + # appendFileTar /tmp/largefile1.gpg "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" & + # appendFileTar /tmp/largefile2.gpg "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" & + # appendFileTar /tmp/largefile3.gpg "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" & + # Depends: bash 5 + + # Save function name + local FN="${FUNCNAME[0]}"; + #yell "DEBUG:STATUS:$FN:Finished appendFileTar()." + + # Set file name + if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:$FN:Not enough arguments."; exit 1; fi + # Check tar path is a file + if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:$FN:Tar archive arg not a file."; exit 1; fi + # Check temp dir arg + if ! [ -z "$4" ]; then TMP_DIR="$4"; else yell "ERROR:$FN:No temporary working dir set."; exit 1; fi + # Set command strings + if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1 + if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2 + if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3 + if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4 + # # Debug + # yell "DEBUG:STATUS:$FN:CMD1:$CMD1" + # yell "DEBUG:STATUS:$FN:CMD2:$CMD2" + # yell "DEBUG:STATUS:$FN:CMD3:$CMD3" + # yell "DEBUG:STATUS:$FN:CMD4:$CMD4" + # yell "DEBUG:STATUS:$FN:FILENAME:$FILENAME" + # yell "DEBUG:STATUS:$FN:TAR_PATH:$TAR_PATH" + # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR" + + # Write to temporary working dir + cat "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME"; + + # Append to tar + try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME"; + #yell "DEBUG:STATUS:$FN:Finished appendFileTar()." +} # Append file to Tar archive magicWriteVersion() { # Desc: Appends time-stamped VERSION to PATHOUT_TAR # Usage: magicWriteVersion @@ -754,25 +845,49 @@ magicWriteVersion() { } # bkgpslog: write version data to PATHOUT_TAR via appendArgTar() magicWriteBuffer() { # Desc: bkgpslog-specific meta function for writing data to DIR_TMP then appending each file to PATHOUT_TAR - # Inputs: PATHOUT_TAR FILEOUT_{NMEA,GPX,KML} CMD_CONV_{NMEA,GPX,KML} CMD_{COMPRESS,ENCRYPT} DIR_TMP + # Inputs: PATHOUT_TAR FILEOUT_{NMEA,GPX,KML} CMD_CONV_{NMEA,GPX,KML} CMD_{COMPRESS,ENCRYPT} DIR_TMP, + # Inputs: BUFFER_TTL bufferTTL_STR SCRIPT_HOSTNAME CMD_COMPRESS_SUFFIX CMD_ENCRYPT_SUFFIX # Depends: yell, try, vbm, appendArgTar, tar local FN="${FUNCNAME[0]}"; wait; # Wait to avoid collision with older magicWriteBuffer() instances (see https://www.tldp.org/LDP/abs/html/x9644.html ) - vbm "DEBUG:STATUS:$FN:Started magicWriteBuffer()."; + timeBufferStart="$(dateTimeShort "$(date --date="$BUFFER_TTL seconds ago")")"; # Note start time#TODO subtract BUFFER_TTL from current time + vbm "DEBUG:STATUS:$FN:Started magicWriteBuffer()."; + # Determine file paths (time is start of buffer period) + FILEOUT_BASENAME="$timeBufferStart""--""$bufferTTL_STR""..""$SCRIPT_HOSTNAME""_location" && vbm "STATUS:Set FILEOUT_BASENAME to:$FILEOUT_BASENAME"; + ## Files saved to DIR_TMP + FILEOUT_NMEA="$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_NMEA to:$FILEOUT_NMEA"; + FILEOUT_GPX="$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_GPX to:$FILEOUT_GPX"; + FILEOUT_KML="$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_KML to:$FILEOUT_KML"; + PATHOUT_NMEA="$DIR_TMP"/"$FILEOUT_NMEA" && vbm "STATUS:Set PATHOUT_NMEA to:$PATHOUT_NMEA"; + PATHOUT_GPX="$DIR_TMP"/"$FILEOUT_GPX" && vbm "STATUS:Set PATHOUT_GPX to:$PATHOUT_GPX"; + PATHOUT_KML="$DIR_TMP"/"$FILEOUT_KML" && vbm "STATUS:Set PATHOUT_KML to:$PATHOUT_KML"; + ## Files saved to disk (DIR_OUT) + ### one file per day (Ex: "20200731..hostname_location.[.gpx.gz].tar") + PATHOUT_TAR="$DIR_OUT"/"$(dateShort "$(date --date="$BUFFER_TTL seconds ago")")".."$SCRIPT_HOSTNAME""_location""$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX".tar && \ + vbm "STATUS:Set PATHOUT_TAR to:$PATHOUT_TAR"; + # DEBUG: check vars + vbm "STATUS:DIR_TMP :$DIR_TMP"; + vbm "STATUS:PATHOUT_TAR :$PATHOUT_TAR"; + vbm "STATUS:PATHOUT_NMEA:$PATHOUT_NMEA"; + vbm "STATUS:PATHOUT_GPX:$PATHOUT_GPX"; + vbm "STATUS:PATHOUT_KML:$PATHOUT_KML"; + + # Validate PATHOUT_TAR as tar. checkMakeTar "$PATHOUT_TAR"; ## Add VERSION file if checkMakeTar had to create a tar (exited 1) or replace one (exited 2) if [[ $? -eq 1 ]] || [[ $? -eq 2 ]]; then magicWriteVersion; fi # Write bufferBash to PATHOUT_TAR - appendArgTar "$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 + appendFileTar "$PATHOUT_BUFFER" "$FILEOUT_NMEA" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_NMEA" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write NMEA data + appendFileTar "$PATHOUT_BUFFER" "$FILEOUT_GPX" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_GPX" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write GPX file + appendFileTar "$PATHOUT_BUFFER" "$FILEOUT_KML" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_KML" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write KML file + # Remove secured chunks from DIR_TMP - try rm "$PATHOUT_NMEA" "$PATHOUT_GPX" "$PATHOUT_KML"; - # yell "DEBUG:STATUS:$FN:Finished magicWriteBuffer()."; -} # bkgpslog write function + rm "$PATHOUT_BUFFER" "$PATHOUT_NMEA" "$PATHOUT_GPX" "$PATHOUT_KML"; + vbm "DEBUG:STATUS:$FN:Finished magicWriteBuffer()."; +} # write buffer to disk main() { processArguments "$@" # Process arguments. @@ -866,47 +981,26 @@ main() { checkMakeTar "$PATHOUT_TAR" && vbm "DEBUG:Confirmed or Created to be a tar:$PATHOUT_TAR"; ## Append VERSION file to PATHOUT_TAR magicWriteVersion; + + # Define GPS conversion commands + CMD_CONV_NMEA="tee /dev/null " && vbm "STATUS:Set CMD_CONV_NMEA to:$CMD_CONV_NMEA"; # tee as passthrough + CMD_CONV_GPX="gpsbabel -i nmea -f - -o gpx -F - " && vbm "STATUS:Set CMD_CONV_GPX to:$CMD_CONV_GPX"; # convert NMEA to GPX + CMD_CONV_KML="gpsbabel -i nmea -f - -o kml -F - " && vbm "STATUS:Set CMD_CONV_KML to:$CMD_CONV_KML"; # convert NMEA to KML - # Record gps data until script lifespan ends + # MAIN LOOP:Record gps data until script lifespan ends declare debugCounter; debugCounter="0"; # set debug counter while [[ "$SECONDS" -lt "$scriptTTL" ]]; do - timeBufferStart="$(dateTimeShort)"; # Note start time - # Determine file paths (time is start of buffer period) - FILEOUT_BASENAME="$timeBufferStart""--""$bufferTTL_STR""..""$SCRIPT_HOSTNAME""_location" && vbm "STATUS:Set FILEOUT_BASENAME to:$FILEOUT_BASENAME"; - ## Files saved to DIR_TMP - FILEOUT_NMEA="$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_NMEA to:$FILEOUT_NMEA"; - FILEOUT_GPX="$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_GPX to:$FILEOUT_GPX"; - FILEOUT_KML="$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_KML to:$FILEOUT_KML"; - PATHOUT_NMEA="$DIR_TMP"/"$FILEOUT_NMEA" && vbm "STATUS:Set PATHOUT_NMEA to:$PATHOUT_NMEA"; - PATHOUT_GPX="$DIR_TMP"/"$FILEOUT_GPX" && vbm "STATUS:Set PATHOUT_GPX to:$PATHOUT_GPX"; - PATHOUT_KML="$DIR_TMP"/"$FILEOUT_KML" && vbm "STATUS:Set PATHOUT_KML to:$PATHOUT_KML"; - ## 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""$CMD_ENCRYPT_SUFFIX".tar && \ - vbm "STATUS:Set PATHOUT_TAR to:$PATHOUT_TAR"; - # Define GPS conversion commands - CMD_CONV_NMEA="tee /dev/null " && vbm "STATUS:Set CMD_CONV_NMEA to:$CMD_CONV_NMEA"; # tee as passthrough - CMD_CONV_GPX="gpsbabel -i nmea -f - -o gpx -F - " && vbm "STATUS:Set CMD_CONV_GPX to:$CMD_CONV_GPX"; # convert NMEA to GPX - CMD_CONV_KML="gpsbabel -i nmea -f - -o kml -F - " && vbm "STATUS:Set CMD_CONV_KML to:$CMD_CONV_KML"; # convert NMEA to KML + # Create buffer file with unique name + PATHOUT_BUFFER="$DIR_TMP/buffer$debugCounter++"; # Fill Bash variable buffer - bufferBash="$(timeout "$BUFFER_TTL""s" gpspipe -r)" && vbm "STATUS:Successfully filled bufferBash variable with gpspipe data."; # Record gpspipe nmea data to buffer for bufferTTL seconds + timeout "$BUFFER_TTL"s gpspipe -r "$PATHOUT_BUFFER" ; # Process bufferBash, save secured chunk set to DIR_TMP - vbm "STATUS:Beginning to save data to $DIR_TMP"; magicWriteBuffer & - # Append each secured chunk in memory dir (DIR_TMP) to file on disk (PATHOUT_TAR in DIR_OUT) - vbm "STATUS:DIR_TMP :$DIR_TMP"; - vbm "STATUS:PATHOUT_TAR :$PATHOUT_TAR"; - vbm "STATUS:PATHOUT_NMEA:$PATHOUT_NMEA"; - vbm "STATUS:PATHOUT_GPX:$PATHOUT_GPX"; - vbm "STATUS:PATHOUT_KML:$PATHOUT_KML"; - - # Reset buffer and filenames - unset bufferBash FILEOUT_BASENAME PATHOUT_NMEA PATHOUT_GPX PATHOUT_KML PATHOUT_TAR timeBufferStart; - vbm "DEBUG:Completed buffer session $debugCounter ." 1>&2; - ((debugCounter++)) + ((debugCounter++)); done - # Remove DIR_TMP + # Cleanup + ## Remove DIR_TMP try rm -r "$DIR_TMP"; vbm "STATUS:Main function finished.";