#!/bin/bash
-
-# Desc: Records gps data until midnight
-# Author: Steven Baltakatei Sandoval; License: GPLv3+
-# Usage: bkgpslog --output [output dir]
+# Desc: Records gps data
#==BEGIN Define script parameters==
-PATH="/opt/bktei:$PATH" # Add default baltakatei script install directory to PATH (necessary for other bk scripts)
-SCRIPT_HOSTNAME=$(hostname) # Save hostname of system running this script.
-SCRIPT_VERSION="bkgpslog 0.0.1" # Define version of script.
-SCRIPT_TIME_SHORT="$(date +%Y%m%dT%H%M%S%z)" # Save current date & time in ISO-8601 format.
-SCRIPT_DATE_SHORT="$(date +%Y%m%d)" # Save current date in ISO-8601 format.
+## Logging Behavior parameters
+bufferTTL="300"; # time between file writes
+scriptTTL_TE="day"; # (day|hour)
+#### TZ="UTC"; export TZ; # Default time zone; overridden by '--time-zone=[str]' option
+dirTmpDefault="/dev/shm"; # Default parent of working directory
+
+scriptTimeStart=$(date +%Y%m%dT%H%M%S.%N);
+PATH="$HOME/.local/bin:$PATH"; # Add "$(systemd-path user-binaries)" path in case apps saved there
+scriptHostname=$(hostname); # Save hostname of system running this script.
+scriptVersion="0.5.8"; # Define version of script.
+scriptName="bkgpslog"; # Define basename of script file.
+scriptURL="https://gitlab.com/baltakatei/ninfacyzga-01"; # Define wesite hosting this script.
+ageVersion="1.0.0-beta2"; # Define version of age (encryption program)
+ageURL="https://github.com/FiloSottile/age/releases/tag/v1.0.0-beta2"; # Define website hosting age.
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 argRecPubKeys # for processArguments function
+# declare -a errorHistory # for correcting buffer lag
+
+## Initialize variables
+optionVerbose=""; optionEncrypt=""; optionCompress=""; optionTmpDir="";
+errReset=0; bufferTTL_AdjFloat=""; scriptTTL="";
#===BEGIN Declare local script functions===
+yell() { echo "$0: $*" >&2; } #o Yell, Die, Try Three-Fingered Claw technique
+die() { yell "$*"; exit 111; } #o Ref/Attrib: https://stackoverflow.com/a/25515370
+try() { "$@" || die "cannot $*"; } #o
checkapp() {
# Desc: If arg is a command, save result in assoc array 'appRollCall'
# Usage: checkapp arg1 arg2 arg3 ...
return 1;
fi
} # Check that dir exists
-
-# Yell, Die, Try Three-Fingered Claw technique
-# Ref/Attrib: https://stackoverflow.com/a/25515370
-yell() { echo "$0: $*" >&2; }
-die() { yell "$*"; exit 111; }
-try() { "$@" || die "cannot $*"; }
-
echoerr() {
echo "$@" 1>&2; # Define stderr echo function.
} # Define stderr message function.
showUsage() {
echoerr "USAGE:"
- echoerr " bkgpslog.sh [ options ]"
+ echoerr " bkgpslog [ options ]"
echoerr
echoerr "OPTIONS:"
echoerr " -h, --help"
echoerr " Display help information."
- echoerr
echoerr " --version"
echoerr " Display script version."
- echoerr
echoerr " -v, --verbose"
echoerr " Display debugging info."
- echoerr
- echoerr " -o, --output [ directory ]"
+ echoerr " -e, --encrypt"
+ echoerr " Encrypt output."
+ echoerr " -r, --recipient [ string pubkey ]"
+ echoerr " Specify recipient. May be age or ssh pubkey."
+ echoerr " May be specified multiple times for multiple pubkeys."
+ echoerr " See https://github.com/FiloSottile/age"
+ echoerr " -o, --output [ path dir ]"
echoerr " Specify output directory to save logs."
+ echoerr " -c, --compress"
+ echoerr " Compress output with gzip (before encryption if enabled)."
+ echoerr " -z, --time-zone"
+ echoerr " Specify time zone. (ex: \"America/New_York\")"
+ echoerr " -t, --temp-dir [path dir]"
+ echoerr " Specify parent directory for temporary working directory."
+ echoerr " Default: \"/dev/shm\""
+ echoerr " -R, --recipient-dir [path dir]"
+ echoerr " Specify directory containing files whose first lines are"
+ echoerr " to be interpreted as pubkey strings (see \\'-r\\' option)."
+ echoerr " -b, --buffer-ttl [integer]"
+ echoerr " Specify custom buffer period in seconds (default: 300 seconds)"
+ echoerr " -B, --script-ttl [integer]"
+ echoerr " Specify custom script time-to-live in seconds (default: \"day\")"
+ echoerr
+ echoerr "EXAMPLE: (bash script lines)"
+ echoerr "/bin/bash bkgpslog -v -e -c \\"
+ echoerr "-z \"UTC\" -t \"/dev/shm\" \\"
+ echoerr "-r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \\"
+ echoerr "-r age1ala848kqrvxc88rzaauc6vc5v0fqrvef9dxyk79m0vjea3hagclswu0lgq \\"
+ echoerr "-o ~/Sync/Location"
} # Display information on how to use this script.
showVersion() {
- echoerr "$SCRIPT_VERSION"
+ echoerr "$scriptVersion"
} # Display script version.
vbm() {
+ # Description: Prints verbose message ("vbm") to stderr if optionVerbose is set to "true".
# Usage: vbm "DEBUG:verbose message here"
- # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true".
- # Input:
- # - OPTION_VERBOSE variable set by processArguments function. (ex: "true", "false")
- # - "$@" positional arguments fed to this function.
+ # Version 0.1.1
+ # Input: arg1: string
+ # vars: optionVerbose
# Output: stderr
- # Script function dependencies: echoerr
- # External function dependencies: echo
- # Last modified: 2020-04-11T23:57Z
- # Last modified by: Steven Baltakatei Sandoval
- # License: GPLv3+
- # Ref./Attrib:
-
- if [ "$OPTION_VERBOSE" = "true" ]; then
- FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds.
- echoerr "[$FUNCTION_TIME] ""$*"; # Display argument text.
+ # Depends: echo 8, date 8
+
+ if [ "$optionVerbose" = "true" ]; then
+ functionTime=$(date --iso-8601=ns); # Save current time in nano seconds.
+ echo "[$functionTime] ""$*" 1>&2; # Display argument text.
fi
# End function
return 0; # Function finished.
-} # Verbose message display function.
+} # Displays message if optionVerbose true
processArguments() {
while [ ! $# -eq 0 ]; do # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
- echoerr "DEBUG:Starting processArguments while loop."
- echoerr "DEBUG:Provided arguments are:""$*"
+ #echoerr "DEBUG:Starting processArguments while loop."
+ #echoerr "DEBUG:Provided arguments are:""$*"
case "$1" in
- --h | --help) showUsage; exit 1;; # Display usage.
+ -h | --help) showUsage; exit 1;; # Display usage.
--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"; fi ;; # Define output directory.
- *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options.
+ -v | --verbose) optionVerbose="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) optionEncrypt="true"; vbm "DEBUG:Encrypted output mode enabled.";; # Enable encryption
+ -r | --recipient) optionRecipients="true"; argRecPubKeys+=("$2"); vbm "STATUS:pubkey added:""$2"; shift;; # Add recipients
+ -c | --compress) optionCompress="true"; vbm "DEBUG:Compressed output mode enabled.";; # Enable compression
+ -z | --time-zone) try setTimeZoneEV "$2"; shift;; # Set timestamp timezone
+ -t | --temp-dir) optionTmpDir="true" && argTempDirPriority="$2"; shift;; # Set time zone
+ -R | --recipient-dir) optionRecipients="true"; optionRecDir="true" && argRecDir="$2"; shift;; # Add recipient watch dir
+ -b | --buffer-ttl) optionCustomBufferTTL="true" && argCustomBufferTTL="$2"; shift;; # Set custom buffer period (default: 300 seconds)
+ -B | --script-ttl) optionCustomScriptTTL_TE="true" && argCustomScriptTTL="$2"; shift;; # Set custom script TTL (default: "day")
+ *) echoerr "ERROR: Unrecognized argument: $1"; echoerr "STATUS:All arguments:$*"; exit 1;; # Handle unrecognized options.
esac
shift
done
} # Argument Processing
-timeUntilMidnight(){
- # Desc: Report seconds until midnight
- # Output: stdout: integer seconds until midnight
+setTimeZoneEV(){
+ # Desc: Set time zone environment variable TZ
+ # Usage: setTimeZoneEV arg1
+ # Version 0.1.1
+ # Input: arg1: 'date'-compatible timezone string (ex: "America/New_York")
+ # TZDIR env var (optional; default: "/usr/share/zoneinfo")
+ # Output: exports TZ
+ # exit code 0 on success
+ # exit code 1 on incorrect number of arguments
+ # exit code 2 if unable to validate arg1
+ # Depends: yell, printenv, bash 5
+ # Tested on: Debian 10
+ local tzDir returnState argTimeZone
+
+ argTimeZone="$1"
+ if ! [[ $# -eq 1 ]]; then
+ yell "ERROR:Invalid argument count.";
+ return 1;
+ fi
+
+ # Read TZDIR env var if available
+ if printenv TZDIR 1>/dev/null 2>&1; then
+ tzDir="$(printenv TZDIR)";
+ else
+ tzDir="/usr/share/zoneinfo";
+ fi
+
+ # Validate TZ string
+ if ! [[ -f "$tzDir"/"$argTimeZone" ]]; then
+ yell "ERROR:Invalid time zone argument.";
+ return 2;
+ else
+ # Export ARG1 as TZ environment variable
+ TZ="$argTimeZone" && export TZ && returnState="true";
+ fi
+
+ # Determine function return code
+ if [ "$returnState" = "true" ]; then
+ return 0;
+ fi
+} # Exports TZ environment variable
+timeUntilNextDay(){
+ # Desc: Report seconds until next day.
+ # Version: 1.0.2
+ # Output: stdout: integer seconds until next day
# Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
- # Usage: timeUntilMidnight
- # Usage: if ! myTTL="$(timeUntilMidnight)"; then yell "ERROR in if statement"; exit 1; fi
- local returnState
- TIME_CURRENT="$(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.
- DATE_CURRENT="$(date -d "$TIME_CURRENT" --iso-8601=date)" ; # Produce `date`-parsable current timestamp with resolution of 1 day.
- DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)" ; # Produce separator-less current timestamp with resolution 1 day.
- DATE_TOMORROW="$(date -d "$TIME_CURRENT next day" --iso-8601=date)" ; # Produce timestamp of tomorrow's date (res. 1 day).
- TIME_NEXT_MIDNIGHT="$(date -d "$DATE_TOMORROW" --iso-8601=seconds)" ; # Produce `date`-parsable timestamp of closest future midnight (res. 1 second).
- SECONDS_UNTIL_NEXT_MIDNIGHT="$(( $(date +%s -d "$TIME_NEXT_MIDNIGHT") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
- if [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -gt 0 ]]; then
+ # Usage: timeUntilNextDay
+ # Usage: if ! myTTL="$(timeUntilNextDay)"; then yell "ERROR in if statement"; exit 1; fi
+ # Depends: date 8, echo 8, yell, try
+
+ local returnState timeCurrent timeNextDay secondsUntilNextDay returnState
+ timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
+ timeNextDay="$(date -d "$timeCurrent next day" --iso-8601=date)"; # Produce timestamp of beginning of tomorrow with resolution of 1 second.
+ secondsUntilNextDay="$(( $(date +%s -d "$timeNextDay") - $(date +%s -d "$timeCurrent") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
+ if [[ "$secondsUntilNextDay" -gt 0 ]]; then
returnState="true";
- elif [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -eq 0 ]]; then
- returnState="WARNING_ZERO";
- yell "WARNING:Reported time until midnight exactly zero.";
- elif [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -lt 0 ]]; then
- returnState="WARNING_NEGATIVE";
- yell "WARNING:Reported time until midnight is negative.";
+ elif [[ "$secondsUntilNextDay" -eq 0 ]]; then
+ returnState="warning_zero";
+ yell "WARNING:Reported time until next day exactly zero.";
+ elif [[ "$secondsUntilNextDay" -lt 0 ]]; then
+ returnState="warning_negative";
+ yell "WARNING:Reported time until next day is negative.";
fi
- try echo "$SECONDS_UNTIL_NEXT_MIDNIGHT"; # Report
+ try echo "$secondsUntilNextDay"; # Report
- #===Determine function return code===
+ # Determine function return code
if [[ "$returnState" = "true" ]]; then
return 0;
- elif [[ "$returnState" = "WARNING_ZERO" ]]; then
+ elif [[ "$returnState" = "warning_zero" ]]; then
return 1;
- elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then
+ elif [[ "$returnState" = "warning_negative" ]]; then
return 2;
fi
-} # Report seconds until next midnight
+} # Report seconds until next day
+timeUntilNextHour(){
+ # Desc: Report seconds until next hour
+ # Version 1.0.1
+ # Output: stdout: integer seconds until next hour
+ # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
+ # Usage: timeUntilNextHour
+ # Usage: if ! myTTL="$(timeUntilNextHour)"; then yell "ERROR in if statement"; exit 1; fi
+
+ local returnState timeCurrent timeNextHour secondsUntilNextHour
+ timeCurrent="$(date --iso-8601=seconds)"; # Produce `date`-parsable current timestamp with resolution of 1 second.
+ timeNextHour="$(date -d "$timeCurrent next hour" --iso-8601=hours)"; # Produce `date`-parsable current time stamp with resolution of 1 second.
+ secondsUntilNextHour="$(( $(date +%s -d "$timeNextHour") - $(date +%s -d "$timeCurrent") ))"; # Calculate seconds until next hour (res. 1 second).
+ if [[ "$secondsUntilNextHour" -gt 0 ]]; then
+ returnState="true";
+ elif [[ "$secondsUntilNextHour" -eq 0 ]]; then
+ returnState="warning_zero";
+ yell "WARNING:Reported time until next hour exactly zero.";
+ elif [[ "$secondsUntilNextHour" -lt 0 ]]; then
+ returnState="warning_negative";
+ yell "WARNING:Reported time until next hour is negative.";
+ fi;
+
+ try echo "$secondsUntilNextHour"; # Report
+
+ # Determine function return code
+ if [[ "$returnState" = "true" ]]; then
+ return 0;
+ elif [[ "$returnState" = "warning_zero" ]]; then
+ return 1;
+ elif [[ "$returnState" = "warning_negative" ]]; then
+ return 2;
+ fi;
+} # Report seconds until next hour
dateTimeShort(){
# Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz)
- # Usage: dateTimeShort
+ # Usage: dateTimeShort ([str date])
+ # Version 1.1.1
+ # Input: arg1: 'date'-parsable timestamp string (optional)
# Output: stdout: timestamp (ISO-8601, no separators)
- TIME_CURRENT="$(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.
- echo "$TIME_CURRENT_SHORT";
-} # Get date&time without separators
-main() {
- processArguments "$@" # Process arguments.
- if checkapp gpspipe && checkdir "$DIROUT"; then
- # Determine output file paths
- FILEOUT_NMEA="$(dateTimeShort)".."$SCRIPT_HOSTNAME"_location.nmea ;
- #FILEOUT_GPX="" ;
- #FILEOUT_KML="" ;
-
- # Determine script lifespan (note: exit if <= 0 since 'timeout' runs forever if provided "0s".
- #if ! scriptTTL="$(timeUntilMidnight)"; then yell "ERROR: timeUntilMidnight exit code $?"; exit 1; fi
- scriptTTL="60"; #DEBUG DEBUG DEBUG DEBUG
-
- # Determine buffer lifespan
- bufferTTL="15";
-
- # Record gps data until life ends
- declare debugCounter; debugCounter="0"
- while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
- ((debugCounter++))
- timeout "$bufferTTL""s" gpspipe -r 1>> "$DIROUT"/"$FILEOUT_NMEA""$debugCounter"
- echo "do stuff" 1>&2;
- done
+ # Depends: yell
+ local argTime timeCurrent timeInput timeCurrentShort
+
+ argTime="$1";
+ # Get Current Time
+ timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
+ # Decide to parse current or supplied date
+ ## Check if time argument empty
+ if [[ -z "$argTime" ]]; then
+ ## T: Time argument empty, use current time
+ timeInput="$timeCurrent";
+ else
+ ## F: Time argument exists, validate time
+ if date --date="$argTime" 1>/dev/null 2>&1; then
+ ### T: Time argument is valid; use it
+ timeInput="$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
+ timeCurrentShort="$(date -d "$timeInput" +%Y%m%dT%H%M%S%z)";
+ echo "$timeCurrentShort";
+} # Get YYYYmmddTHHMMSS±zzzz
+dateShort(){
+ # Desc: Date without separators (YYYYmmdd)
+ # Usage: dateShort ([str date])
+ # Version: 1.1.1
+ # Input: arg1: 'date'-parsable timestamp string (optional)
+ # Output: stdout: date (ISO-8601, no separators)
+ # Depends: yell
+ local argTime timeCurrent timeInput dateCurrentShort
+
+ argTime="$1";
+ # Get Current Time
+ timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
+ # Decide to parse current or supplied date
+ ## Check if time argument empty
+ if [[ -z "$argTime" ]]; then
+ ## T: Time argument empty, use current time
+ timeInput="$timeCurrent";
+ else
+ ## F: Time argument exists, validate time
+ if date --date="$argTime" 1>/dev/null 2>&1; then
+ ### T: Time argument is valid; use it
+ timeInput="$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
+ dateCurrentShort="$(date -d "$timeInput" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day.
+ echo "$dateCurrentShort";
+} # Get YYYYmmdd
+timeDuration(){
+ # Desc: Given seconds, output ISO-8601 duration string
+ # Ref/Attrib: ISO-8601:2004(E), §4.4.4.2 Representations of time intervals by duration and context information
+ # Note: "1 month" ("P1M") is assumed to be "30 days" (see ISO-8601:2004(E), §2.2.1.2)
+ # Usage: timeDuration [1:seconds] ([2:precision])
+ # Version: 1.0.4
+ # Input: arg1: seconds as base 10 integer >= 0 (ex: 3601)
+ # arg2: precision level (optional; default=2)
+ # Output: stdout: ISO-8601 duration string (ex: "P1H1S", "P2Y10M15DT10H30M20S")
+ # exit code 0: success
+ # exit code 1: error_input
+ # exit code 2: error_unknown
+ # Example: 'timeDuration 111111 3' yields 'P1DT6H51M'
+ # Depends: date 8, bash 5, yell,
+ local argSeconds argPrecision precision returnState remainder
+ local fullYears fullMonths fullDays fullHours fullMinutes fullSeconds
+ local hasYears hasMonths hasDays hasHours hasMinutes hasSeconds
+ local witherPrecision output
+ local displayYears displayMonths displayDays displayHours displayMinutes displaySeconds
+
+ argSeconds="$1"; # read arg1 (seconds)
+ argPrecision="$2"; # read arg2 (precision)
+ precision=2; # set default precision
+
+ # Check that between one and two arguments is supplied
+ if ! { [[ $# -ge 1 ]] && [[ $# -le 2 ]]; }; then
+ yell "ERROR:Invalid number of arguments:$# . Exiting.";
+ returnState="error_input"; fi
+
+ # Check that argSeconds provided
+ if [[ $# -ge 1 ]]; then
+ ## Check that argSeconds is a positive integer
+ if [[ "$argSeconds" =~ ^[[:digit:]]+$ ]]; then
+ :
+ else
+ yell "ERROR:argSeconds not a digit.";
+ returnState="error_input";
+ fi
+ else
+ yell "ERROR:No argument provided. Exiting.";
+ exit 1;
+ fi
+
+ # Consider whether argPrecision was provided
+ if [[ $# -eq 2 ]]; then
+ # Check that argPrecision is a positive integer
+ if [[ "$argPrecision" =~ ^[[:digit:]]+$ ]] && [[ "$argPrecision" -gt 0 ]]; then
+ precision="$argPrecision";
+ else
+ yell "ERROR:argPrecision not a positive integer. (is $argPrecision ). Leaving early.";
+ returnState="error_input";
+ fi;
+ else
+ :
+ fi;
+
+ remainder="$argSeconds" ; # seconds
+ ## Calculate full years Y, update remainder
+ fullYears=$(( remainder / (365*24*60*60) ));
+ remainder=$(( remainder - (fullYears*365*24*60*60) ));
+ ## Calculate full months M, update remainder
+ fullMonths=$(( remainder / (30*24*60*60) ));
+ remainder=$(( remainder - (fullMonths*30*24*60*60) ));
+ ## Calculate full days D, update remainder
+ fullDays=$(( remainder / (24*60*60) ));
+ remainder=$(( remainder - (fullDays*24*60*60) ));
+ ## Calculate full hours H, update remainder
+ fullHours=$(( remainder / (60*60) ));
+ remainder=$(( remainder - (fullHours*60*60) ));
+ ## Calculate full minutes M, update remainder
+ fullMinutes=$(( remainder / (60) ));
+ remainder=$(( remainder - (fullMinutes*60) ));
+ ## Calculate full seconds S, update remainder
+ fullSeconds=$(( remainder / (1) ));
+ remainder=$(( remainder - (remainder*1) ));
+ ## Check which fields filled
+ if [[ $fullYears -gt 0 ]]; then hasYears="true"; else hasYears="false"; fi
+ if [[ $fullMonths -gt 0 ]]; then hasMonths="true"; else hasMonths="false"; fi
+ if [[ $fullDays -gt 0 ]]; then hasDays="true"; else hasDays="false"; fi
+ if [[ $fullHours -gt 0 ]]; then hasHours="true"; else hasHours="false"; fi
+ if [[ $fullMinutes -gt 0 ]]; then hasMinutes="true"; else hasMinutes="false"; fi
+ if [[ $fullSeconds -gt 0 ]]; then hasSeconds="true"; else hasSeconds="false"; fi
+
+ ## Determine which fields to display (see ISO-8601:2004 §4.4.3.2)
+ witherPrecision="false"
+
+ ### Years
+ if $hasYears && [[ $precision -gt 0 ]]; then
+ displayYears="true";
+ witherPrecision="true";
+ else
+ displayYears="false";
+ fi;
+ if $witherPrecision; then ((precision--)); fi;
+
+ ### Months
+ if $hasMonths && [[ $precision -gt 0 ]]; then
+ displayMonths="true";
+ witherPrecision="true";
+ else
+ displayMonths="false";
+ fi;
+ if $witherPrecision && [[ $precision -gt 0 ]]; then
+ displayMonths="true";
+ fi;
+ if $witherPrecision; then ((precision--)); fi;
+
+ ### Days
+ if $hasDays && [[ $precision -gt 0 ]]; then
+ displayDays="true";
+ witherPrecision="true";
+ else
+ displayDays="false";
+ fi;
+ if $witherPrecision && [[ $precision -gt 0 ]]; then
+ displayDays="true";
+ fi;
+ if $witherPrecision; then ((precision--)); fi;
+
+ ### Hours
+ if $hasHours && [[ $precision -gt 0 ]]; then
+ displayHours="true";
+ witherPrecision="true";
+ else
+ displayHours="false";
+ fi;
+ if $witherPrecision && [[ $precision -gt 0 ]]; then
+ displayHours="true";
+ fi;
+ if $witherPrecision; then ((precision--)); fi;
+
+ ### Minutes
+ if $hasMinutes && [[ $precision -gt 0 ]]; then
+ displayMinutes="true";
+ witherPrecision="true";
+ else
+ displayMinutes="false";
+ fi;
+ if $witherPrecision && [[ $precision -gt 0 ]]; then
+ displayMinutes="true";
+ fi;
+ if $witherPrecision; then ((precision--)); fi;
+
+ ### Seconds
+
+ if $hasSeconds && [[ $precision -gt 0 ]]; then
+ displaySeconds="true";
+ witherPrecision="true";
+ else
+ displaySeconds="false";
+ fi;
+ if $witherPrecision && [[ $precision -gt 0 ]]; then
+ displaySeconds="true";
+ fi;
+ if $witherPrecision; then ((precision--)); fi;
+
+ ## Determine whether or not the "T" separator is needed to separate date and time elements
+ if ( $displayHours || $displayMinutes || $displaySeconds); then
+ displayDateTime="true"; else displayDateTime="false"; fi
+
+ ## Construct duration output string
+ output="P"
+ if $displayYears; then
+ output=$output$fullYears"Y"; fi
+ if $displayMonths; then
+ output=$output$fullMonths"M"; fi
+ if $displayDays; then
+ output=$output$fullDays"D"; fi
+ if $displayDateTime; then
+ output=$output"T"; fi
+ if $displayHours; then
+ output=$output$fullHours"H"; fi
+ if $displayMinutes; then
+ output=$output$fullMinutes"M"; fi
+ if $displaySeconds; then
+ output=$output$fullSeconds"S"; fi
+
+ ## Output duration string to stdout
+ echo "$output" && returnState="true";
+
+ #===Determine function return code===
+ if [ "$returnState" = "true" ]; then
+ return 0;
+ elif [ "$returnState" = "error_input" ]; then
+ yell "ERROR:input";
+ return 1;
+ else
+ yell "ERROR:Unknown";
+ return 2;
+ fi
+
+} # Get duration (ex: PT10M4S )
+displayMissing() {
+ # Desc: Displays missing apps, files, and dirs
+ # Usage: displayMissing
+ # Version 0.1.0
+ # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
+ # Output: stderr: messages indicating missing apps, file, or dirs
+ # Depends: bash 5, checkAppFileDir()
+ #==BEGIN Display errors==
+ #===BEGIN Display Missing Apps===
+ missingApps="Missing apps :"
+ #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
+ for key in "${!appRollCall[@]}"; do
+ value="${appRollCall[$key]}"
+ if [ "$value" = "false" ]; then
+ #echo "DEBUG:Missing apps: $key => $value";
+ missingApps="$missingApps""$key "
+ appMissing="true"
+ fi
+ done
+ if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing.
+ echo "$missingApps" 1>&2;
+ fi
+ #===END Display Missing Apps===
+
+ #===BEGIN Display Missing Files===
+ missingFiles="Missing files:"
+ #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
+ for key in "${!fileRollCall[@]}"; do
+ value="${fileRollCall[$key]}"
+ if [ "$value" = "false" ]; then
+ #echo "DEBUG:Missing files: $key => $value";
+ missingFiles="$missingFiles""$key "
+ fileMissing="true"
+ fi
+ done
+ if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing.
+ echo "$missingFiles" 1>&2;
+ fi
+ #===END Display Missing Files===
+
+ #===BEGIN Display Missing Directories===
+ missingDirs="Missing dirs:"
+ #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
+ for key in "${!dirRollCall[@]}"; do
+ value="${dirRollCall[$key]}"
+ if [ "$value" = "false" ]; then
+ #echo "DEBUG:Missing dirs: $key => $value";
+ missingDirs="$missingDirs""$key "
+ dirMissing="true"
+ fi
+ done
+ if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing.
+ echo "$missingDirs" 1>&2;
+ fi
+ #===END Display Missing Directories===
+
+ #==END Display errors==
+} # Display missing apps, files, dirs
+magicSetScriptTTL() {
+ #Desc: Sets script_TTL seconds from provided time_element string argument
+ #Usage: magicSetScriptTTL [str time_element]
+ #Input: arg1: string (Ex: scriptTTL_TE; "day" or "hour")
+ #Output: var: scriptTTL (integer seconds)
+ #Depends: timeUntilNextHour, timeUntilNextDay
+ local argTimeElement
+ argTimeElement="$1"
+ if [[ "$argTimeElement" = "day" ]]; then
+ # Set script lifespan to end at start of next day
+ if ! scriptTTL="$(timeUntilNextDay)"; then
+ if [[ "$scriptTTL" -eq 0 ]]; then
+ ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
+ else
+ yell "ERROR: timeUntilNextDay exit code $?"; exit 1;
+ fi;
+ fi;
+ elif [[ "$argTimeElement" = "hour" ]]; then
+ # Set script lifespan to end at start of next hour
+ if ! scriptTTL="$(timeUntilNextHour)"; then
+ if [[ "$scriptTTL" -eq 0 ]]; then
+ ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
+ else
+ yell "ERROR: timeUntilNextHour exit code $?"; exit 1;
+ fi;
+ fi;
+ else
+ yell "ERROR:Invalid argument for setScriptTTL function:$argTimeElement"; exit 1;
fi
+} # Seconds until next (day|hour).
+checkMakeTar() {
+ # Desc: Checks that a valid tar archive exists, creates one otherwise
+ # Usage: checkMakeTar [ path ]
+ # Version: 1.0.2
+ # 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: bash 5, date 8, tar 1, try()
+ local pathTar returnFlag0 returnFlag1 returnFlag2
+ pathTar="$1";
+
+ # Check if file is a valid tar archive
+ if tar --list --file="$pathTar" 1>/dev/null 2>&1; then
+ ## T1: return success
+ returnFlag0="tar valid";
+ else
+ ## F1: Check if file exists
+ if [[ -f "$pathTar" ]]; then
+ ### T: Rename file
+ try mv "$pathTar" "$pathTar""--broken--""$(date +%Y%m%dT%H%M%S)" && \
+ returnFlag1="tar moved";
+ else
+ ### F: -
+ :
+ fi;
+ ## F2: Create tar archive, return 0
+ try tar --create --file="$pathTar" --files-from=/dev/null && \
+ returnFlag2="tar created";
+ fi;
+
+ # Determine function return code
+ if [[ "$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: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
+ # Version: 1.0.6
+ # Input: arg1: data to be written
+ # arg2: file name of file to be inserted into tar
+ # arg3: tar archive path (must exist first)
+ # arg4: temporary working dir
+ # arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ")
+ # Output: file written to disk
+ # Example: decrypt multiple large files in parallel
+ # appendArgTar "$(cat /tmp/largefile1.gpg)" "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
+ # appendArgTar "$(cat /tmp/largefile2.gpg)" "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
+ # appendArgTar "$(cat /tmp/largefile3.gpg)" "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
+ # Depends: bash 5, tar 1, yell()
+ # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
+
+ local fn fileName tarPath tmpDir cmd0 cmd1 cmd2 cmd3 cmd4
+
+ # Save function name
+ fn="${FUNCNAME[0]}";
+ #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
+
+ # 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 tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file."; exit 1; fi
+
+ # Check temp dir arg
+ if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi
+
+ # Set command strings
+ if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string 1
+ if ! [ -z "$6" ]; then cmd2="$6"; else cmd2="cat "; fi # command string 2
+ if ! [ -z "$7" ]; then cmd3="$7"; else cmd3="cat "; fi # command string 3
+ if ! [ -z "$8" ]; then cmd4="$8"; else cmd4="cat "; fi # command string 4
+
+ # Input command
+ cmd0="echo \"\$1\""
+
+ # # Debug
+ # yell "DEBUG:STATUS:$fn:cmd0:$cmd0"
+ # yell "DEBUG:STATUS:$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:tarPath:$tarPath"
+ # yell "DEBUG:STATUS:$fn:tmpDir:$tmpDir"
+
+ # Write to temporary working dir
+ eval "$cmd0 | $cmd1 | $cmd2 | $cmd3 | $cmd4" > "$tmpDir"/"$fileName";
+
+ # Append to tar
+ try tar --append --directory="$tmpDir" --file="$tarPath" "$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: 1.0.3
+ # 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" $HOME/archive.tar /tmp "gpg --decrypt" &
+ # Depends: bash 5, tar 1, yell()
+
+ local fn fileName tarPath tmpDir
+
+ # Save function name
+ fn="${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 tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file:$3"; exit 1; fi
+ # Check temp dir arg
+ if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi
+ # Set command strings
+ if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string 1
+ if ! [ -z "$6" ]; then cmd2="$6"; else cmd2="cat "; fi # command string 2
+ if ! [ -z "$7" ]; then cmd3="$7"; else cmd3="cat "; fi # command string 3
+ if ! [ -z "$8" ]; then cmd4="$8"; else cmd4="cat "; fi # command string 4
+
+ # Input command string
+ cmd0="cat \"\$1\""
+
+ # # Debug
+ # yell "DEBUG:STATUS:$fn:cmd0:$cmd0"
+ # yell "DEBUG:STATUS:$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:tarPath:$tarPath"
+ # yell "DEBUG:STATUS:$fn:tmpDir:$tmpDir"
+
+ # Write to temporary working dir
+ eval "$cmd0 | $cmd1 | $cmd2 | $cmd3 | $cmd4" > "$tmpDir"/"$fileName";
+
+ # Append to tar
+ try tar --append --directory="$tmpDir" --file="$tarPath" "$fileName";
+ #yell "DEBUG:STATUS:$fn:Finished appendFileTar()."
+} # Append file to Tar archive
+checkAgePubkey() {
+ # Desc: Checks if string is an age-compatible pubkey
+ # Usage: checkAgePubkey [str pubkey]
+ # Version: 0.1.2
+ # Input: arg1: string
+ # Output: return code 0: string is age-compatible pubkey
+ # return code 1: string is NOT an age-compatible pubkey
+ # age stderr (ex: there is stderr if invalid string provided)
+ # Depends: age (v0.1.0-beta2; https://github.com/FiloSottile/age/releases/tag/v1.0.0-beta2 )
+
+ argPubkey="$1";
+
+ if echo "test" | age -a -r "$argPubkey" 1>/dev/null; then
+ return 0;
+ else
+ return 1;
+ fi;
+} # Check age pubkey
+validateInput() {
+ # Desc: Validates Input
+ # Usage: validateInput [str input] [str input type]
+ # Version: 0.3.1
+ # Input: arg1: string to validate
+ # arg2: string specifying input type (ex:"ssh_pubkey")
+ # Output: return code 0: if input string matched specified string type
+ # Depends: bash 5, yell()
+
+ local fn argInput argType
+
+ # Save function name
+ fn="${FUNCNAME[0]}";
+
+ # Process arguments
+ argInput="$1";
+ argType="$2";
+ if [[ $# -gt 2 ]]; then yell "ERROR:$0:$fn:Too many arguments."; exit 1; fi;
+
+ # Check for blank
+ if [[ -z "$argInput" ]]; then return 1; fi
+
+ # Define input types
+ ## ssh_pubkey
+ ### Check for alnum/dash base64 (ex: "ssh-rsa AAAAB3NzaC1yc2EAAA")
+ if [[ "$argType" = "ssh_pubkey" ]]; then
+ if [[ "$argInput" =~ ^[[:alnum:]-]*[\ ]*[[:alnum:]+/=]*$ ]]; then
+ return 0; fi; fi;
+
+ ## age_pubkey
+ ### Check for age1[:bech32:]
+ if [[ "$argType" = "age_pubkey" ]]; then
+ if [[ "$argInput" =~ ^age1[qpzry9x8gf2tvdw0s3jn54khce6mua7l]*$ ]]; then
+ return 0; fi; fi
+
+ ## integer
+ if [[ "$argType" = "integer" ]]; then
+ if [[ "$argInput" =~ ^[[:digit:]]*$ ]]; then
+ return 0; fi; fi;
+
+ ## time element (year, month, week, day, hour, minute, second)
+ if [[ "$argType" = "time_element" ]]; then
+ if [[ "$argInput" = "year" ]] || \
+ [[ "$argInput" = "month" ]] || \
+ [[ "$argInput" = "week" ]] || \
+ [[ "$argInput" = "day" ]] || \
+ [[ "$argInput" = "hour" ]] || \
+ [[ "$argInput" = "minute" ]] || \
+ [[ "$argInput" = "second" ]]; then
+ return 0; fi; fi;
+
+ # Return error if no condition matched.
+ return 1;
+} # Validates strings
+timeEpochNS() {
+ # Desc: Get epoch nanoseconds
+ # Usage: timeEpochNS
+ # Version 0.2.3
+ # Input: arg1: 'date'-parsable timestamp string (optional)
+ # Output: Nanoseconds since 1970-01-01
+ # Depends: date 8, cut 8, yell()
+ # Ref/Attrib: Force base 10 Bash arith with '10#'. https://stackoverflow.com/a/24777667
+ local argTime timeCurrent timeInput timeEpochFloat timeEpochInt
+ local timeEpochNsFrac timeEpochNs
+
+ argTime="$1";
+
+ # Get Current Time
+ timeCurrent="$(date --iso-8601=ns)"; # Produce `date`-parsable current timestamp with resolution of 1 nanosecond.
+
+ # Decide to parse current or supplied time
+ ## Check if time argument empty
+ if [[ -z "$argTime" ]]; then
+ ## T: Time argument empty, use current time
+ timeInput="$timeCurrent";
+ else
+ ## F: Time argument exists, validate time
+ if date --date="$argTime" 1>/dev/null 2>&1; then
+ ### T: Time argument is valid; use it
+ timeInput="$argTime";
+ else
+ ### F: Time argument not valid; exit
+ yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
+ fi;
+ fi;
+ # Construct and deliver nanoseconds since 1970-01-01
+ timeEpochFloat="$(date --date="$timeInput" +%s.%N)"; # Save ssss.NNNNNNNNN
+ timeEpochInt="$(echo "$timeEpochFloat" | cut -d. -f1)"; # Get ssss
+ timeEpochNsFrac="$(echo "$timeEpochFloat" | cut -d. -f2)"; # Get NNNNNNNNN
+ timeEpochNs="$(( (10#"$timeEpochInt" * 10**9) + (10#"$timeEpochNsFrac") ))";
+ echo "$timeEpochNs";
+} # Nanoseconds since 1970-01-01
+magicBufferSleepPID() {
+ # Desc: Compensates for lag so buffer rounds start every bufferTTL seconds
+ # Input: vars: bufferTTL, errReset
+ # # Input: array: errorHistory errResetx10e3
+ # Output: vars: bufferTTL_AdjFloat
+ # Re/Attrib: https://en.wikipedia.org/wiki/PID_controller#Standard_versus_parallel_(ideal)_form
+ local buffer_ttl_ns k_p t_i t_d
+ local timeBufferStartNS timeBufferStartNSExp errNS errReset errRate
+ local adj buffer_ttl_adj_ns buffer_ttl_adj_int buffer_ttl_adj_floatfrac
+ # local errNSx10e3 errResetx10e3 errRatex10e3
+ # local errorHistorySize
+
+ # ## Define errorHistorySize
+ # errorHistorySize=100;
+ ## Define bufferTTL in nanoseconds
+ buffer_ttl_ns=$((bufferTTL * 10**9)) && vbm "buffer_ttl_ns:$buffer_ttl_ns";
+
+ ### PID Control factors
+ k_p=1; # Gain for compensating buffer round lag
+ t_i="$(((4)*buffer_ttl_ns/(1)))"; # Consider this number of past nanoseconds to eliminate error
+ t_d="$(((1)*buffer_ttl_ns/(1)))"; # Predict value this number of nanoseconds into the future
+
+ # Calculate Error, errNS, in nanoseconds
+ ## Get current time
+ timeBufferStartNS="$(timeEpochNS)" && vbm "timeBufferStartNS :$timeBufferStartNS";
+ ## Calculate expected time (from start time, current buffer round number, nominal bufferTTL)
+ timeBufferStartNSExp="$(( (timeBufferFirstNS) + (buffer_ttl_ns * bufferRound) ))" && vbm "timeBufferStartNSExp:$timeBufferStartNSExp";
+ ## Calculate error (diff between timeBufferStartNSExp and timeBufferStartNS; usually negative)
+ errNS="$(( timeBufferStartNSExp - timeBufferStartNS ))" && vbm "errNS:$errNS";
+# errNSx10e3="$((errNS*10**3))" && vbm "errNSx10e3:$errNSx10e3";
+ # ## Append error to errorHistory
+ # errorHistory+=("errNS");
+ # ### Trim errorHistory array if over errorHistorySize
+ # while [[ "${#errorHistory[@]}" -gt "errorHistorySize" ]]; then do
+ # unset "errorHistory[0]"; # remove oldest entry, creating sparse array
+ # errorHistory=("${errorHistory[@]}"); # reindex sparse array
+ # vbm "STATUS:Trimmed errorHistory array. Entry count:${#errorHistory[@]}";
+ # done;
+
+ # Calculate errReset in nanoseconds^2
+ ## errReset = int(errHistory(t),wrt(delta_buffer_ttl))
+ ## Integrate errorHistory with respect to time
+ # for value in "${errorHistory[@]}"; do
+ # errReset=$(( errReset + ( value*buffer_ttl_ns ) ));
+ # done;
+ vbm "errReset(orig):$errReset"
+ errReset="$(( (errReset + (errNS*buffer_ttl_ns)) ))" && vbm "errReset(post):$errReset";
+# errResetx10e3="$(( ( errResetx10e3 + ( errNSx10e3 * buffer_ttl_ns ) )*10**3 ))" && vbm "errResetx10e3:$errResetx10e3";
+
+ # Calculate errRate in nanoseconds per nanosecond
+ errRate="$(( errNS / buffer_ttl_ns ))" && vbm "errRate:$errRate";
+# errRatex10e3="$(( ( errNSx10e3 ) / buffer_ttl_ns ))" && vbm "errRatex10e3:$errRatex10e3";
+
+ # Debug
+ vbm "errNS :$errNS";
+ vbm "errResetTerm:$((errReset/t_i))";
+ vbm "errRateTerm :$((errRate*t_d))";
+
+ # Calculate PID control signal
+ ## adj = k_p * (errNS + errReset/t_i + errRate*t_d)
+ adj="$(( k_p*(errNS + errReset/t_i + errRate*t_d) ))" && vbm "adj:$adj";
+# adj="$((k_p*(errNSx10e3 + (errResetx10e3/t_i) + (errRatex10e3*t_d) )/(10**3)))" && vbm "adj:$adj";
+
+ # Calculate bufferTTL_AdjFloat from adj (ns)
+ ## Calculate buffer_ttl_adj in nanoseconds (buffer_ttl_adj_ns = buffer_ttl_ns + adj)
+ buffer_ttl_adj_ns="$((buffer_ttl_ns + adj))" && vbm "buffer_ttl_adj_ns:$buffer_ttl_adj_ns";
+ ## Calculate integer seconds
+ buffer_ttl_adj_int="$((buffer_ttl_adj_ns/(10**9)))" && vbm "buffer_ttl_adj_int:$buffer_ttl_adj_int";
+ ### Catch negative integer seconds, set minimum of bufferTTL/10 seconds
+ if [[ "$buffer_ttl_adj_int" -le "$((bufferTTL/10))" ]]; then
+ buffer_ttl_adj_int="$((bufferTTL/10))";
+ yell "WARNING:Buffer lag adjustment yielded negative seconds.";
+ fi;
+ ## Calculate nanosecond remainder
+ ### Remove integer
+ buffer_ttl_adj_floatfrac="$((buffer_ttl_adj_ns - (buffer_ttl_adj_int*(10**9)) ))" && vbm "buffer_ttl_adj_floatfrac:$buffer_ttl_adj_floatfrac";
+ ### Calc absolute value of fraction (by removing '-' if present; see https://stackoverflow.com/a/47240327
+ buffer_ttl_adj_floatfrac="${buffer_ttl_adj_floatfrac#-}" && vbm "buffer_ttl_adj_floatfrac:$buffer_ttl_adj_floatfrac";
+ ## Form float bufferTTL_AdjFloat (function output)
+ bufferTTL_AdjFloat="$buffer_ttl_adj_int"."$buffer_ttl_adj_floatfrac" && vbm "bufferTTL_AdjFloat:$bufferTTL_AdjFloat";
+ vbm "STATUS:Calculated adjusted bufferTTL (seconds):$bufferTTL_AdjFloat";
+} # Calc bufferTTL_AdjFloat so buffer starts every bufferTTL seconds
+magicWriteVersion() {
+ # Desc: Appends time-stamped VERSION to pathout_tar
+ # Usage: magicWriteVersion
+ # Input: vars: pathout_tar, dir_tmp
+ # Input: array: recPubKeysValid
+ # Input: scriptVersion, scriptURL, ageVersion, ageURL, scriptHostname
+ # Output: appends tar (pathout_tar)
+ # Depends: dateTimeShort, appendArgTar
+ local fileoutVersion contentVersion pubKeyIndex
+
+ # Set VERSION file name
+ fileoutVersion="$(dateTimeShort)..VERSION";
+
+ # Gather VERSION data in contentVersion
+ contentVersion="scriptVersion=$scriptVersion";
+ #contentVersion="$contentVersion""\\n";
+ contentVersion="$contentVersion""\\n""scriptName=$scriptName";
+ contentVersion="$contentVersion""\\n""scriptURL=$scriptURL";
+ contentVersion="$contentVersion""\\n""ageVersion=$ageVersion";
+ contentVersion="$contentVersion""\\n""ageURL=$ageURL";
+ contentVersion="$contentVersion""\\n""date=$(date --iso-8601=seconds)";
+ contentVersion="$contentVersion""\\n""hostname=$scriptHostname";
+ ## Add list of recipient pubkeys
+ for pubkey in "${recPubKeysValid[@]}"; do
+ ((pubKeyIndex++))
+ contentVersion="$contentVersion""\\n""PUBKEY_$pubKeyIndex=$pubkey";
+ done
+ ## Process newline escapes
+ contentVersion="$(echo -e "$contentVersion")"
+
+ # Write contentVersion as file fileoutVersion and write-append to pathout_tar
+ appendArgTar "$contentVersion" "$fileoutVersion" "$pathout_tar" "$dir_tmp";
+} # bkgpslog: write version data to pathout_tar via appendArgTar()
+magicGatherWriteBuffer() {
+ # Desc: bkgpslog-specific meta function for writing data to dir_tmp then appending each file to pathout_tar
+ # Inputs: vars: pathout_tar, cmd_conv_{nmea,gpx,kml}, cmd_{compress,encrypt} dir_tmp,
+ # Inputs: vars: bufferTTL bufferTTL_STR scriptHostname cmd_compress_suffix cmd_encrypt_suffix
+ # Output: file: (pathout_tar)
+ # Depends: tar 1, date 8, sleep 8, yell(), try(), vbm(), appendArgTar(), checkMakeTar()
+ # Depends: magicWriteVersion(), appendFileTar()
+ local fn pathoutBuffer timeBufferStartLong timeBufferStart fileoutBasename
+ local fileout_nmea fileout_gpx fileout_kml pathout_nmea pathout_gpx pathout_kml pathout_tar
+
+ # Debug:Get function name
+ fn="${FUNCNAME[0]}";
+
+ vbm "DEBUG:STATUS:$fn:Started magicGatherWriteBuffer().";
+
+ # Create buffer file with unique name
+ pathoutBuffer="$dir_tmp/buffer$SECONDS" && vbm "pathoutBuffer:$pathoutBuffer";
+ # Fill buffer
+ timeout "$bufferTTL"s gpspipe -r -o "$pathoutBuffer" ;
+ timeBufferStartLong="$(date --date="$bufferTTL seconds ago" --iso-8601=seconds)" && vbm "timeBufferStartLong:$timeBufferStartLong";
+ timeBufferStart="$(dateTimeShort "$timeBufferStartLong" )" && vbm "timeBufferStart:$timeBufferStart"; # Note start time
+ # Determine file paths (time is start of buffer period)
+ fileoutBasename="$timeBufferStart""--""$bufferTTL_STR""..""$scriptHostname""_location" && vbm "STATUS:Set fileoutBasename to:$fileoutBasename";
+ ## Files saved to dir_tmp
+ fileout_nmea="$fileoutBasename".nmea"$cmd_compress_suffix""$cmd_encrypt_suffix" && vbm "STATUS:Set fileout_nmea to:$fileout_nmea";
+ fileout_gpx="$fileoutBasename".gpx"$cmd_compress_suffix""$cmd_encrypt_suffix" && vbm "STATUS:Set fileout_gpx to:$fileout_gpx";
+ fileout_kml="$fileoutBasename".kml"$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:$pathout_kml";
+ ## Files saved to disk (dirOut)
+ ### one file per day (Ex: "20200731..hostname_location.[.gpx.gz].tar")
+ pathout_tar="$dirOut"/"$(dateShort "$(date --date="$bufferTTL seconds ago" --iso-8601=seconds)")".."$scriptHostname""_location""$cmd_compress_suffix""$cmd_encrypt_suffix".tar && \
+ vbm "STATUS:Set pathout_tar to:$pathout_tar";
+ # DEBUG: check vars
+ vbm "STATUS:fn :$fn";
+ 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 :$pathout_kml";
+ vbm "STATUS:bufferTTL :$bufferTTL";
+ vbm "STATUS:pathoutBuffer :$pathoutBuffer";
+ vbm "STATUS:timeBufferStart:$timeBufferStart";
+ vbm "fileoutBasename :$fileoutBasename";
+
+ # Validate pathout_tar as tar.
+ checkMakeTar "$pathout_tar";
+ ## Add VERSION file if checkMakeTar had to create a tar (exited 1) or replace one (exited 2)
+ vbm "exit status before magicWriteVersion:$?"
+ if [[ $? -eq 1 ]] || [[ $? -eq 2 ]]; then magicWriteVersion; fi
+
+ # Write bufferBash to pathout_tar
+ wait; # Wait to avoid collision with older magicWriteBuffer() instances (see https://www.tldp.org/LDP/abs/html/x9644.html )
+ appendFileTar "$pathoutBuffer" "$fileout_nmea" "$pathout_tar" "$dir_tmp" "$cmd_conv_nmea" "$cmd_compress" "$cmd_encrypt"; # Write NMEA data
+ appendFileTar "$pathoutBuffer" "$fileout_gpx" "$pathout_tar" "$dir_tmp" "$cmd_conv_gpx" "$cmd_compress" "$cmd_encrypt"; # Write GPX file
+ appendFileTar "$pathoutBuffer" "$fileout_kml" "$pathout_tar" "$dir_tmp" "$cmd_conv_kml" "$cmd_compress" "$cmd_encrypt"; # Write KML file
+
+ # Remove secured chunks from dir_tmp
+ rm "$pathoutBuffer" "$pathout_nmea" "$pathout_gpx" "$pathout_kml";
+ vbm "DEBUG:STATUS:$fn:Finished magicGatherWriteBuffer().";
+} # write buffer to disk
+magicParseRecipientDir() {
+ # Desc: Updates recPubKeysValid with pubkeys in dir specified by '-R' option ("recipient directory")
+ # Inputs: vars: optionRecDir, argRecDir, optionEncrypt
+ # arry: recPubKeysValid
+ # Outputs: arry: recPubKeysValid
+ # Depends: processArguments,
+ local recipientDir recFileLine updateRecipients
+ declare -a candRecPubKeysValid
+
+ # Check that '-e' and '-R' set
+ if [[ "$optionEncrypt" = "true" ]] && [[ "$optionRecDir" = "true" ]]; then
+ ### Check that argRecDir is a directory.
+ if [[ -d "$argRecDir" ]]; then
+ recipientDir="$argRecDir" && vbm "STATUS:Recipient watch directory detected:\"$recipientDir\"";
+ #### Initialize variable indicating outcome of pubkey review
+ unset updateRecipients
+ #### Add existing recipients
+ candRecPubKeysValid=("${recPubKeysValidStatic[@]}");
+ #### Parse files in recipientDir
+ for file in "$recipientDir"/*; do
+ ##### Read first line of each file
+ recFileLine="$(head -n1 "$file")" && vbm "STATUS:Checking if pubkey:\"$recFileLine\"";
+ ##### check if first line is a valid pubkey
+ if checkAgePubkey "$recFileLine" && \
+ ( validateInput "$recFileLine" "ssh_pubkey" || validateInput "$recFileLine" "age_pubkey"); then
+ ###### T: add candidate pubkey to candRecPubKeysValid
+ candRecPubKeysValid+=("$recFileLine") && vbm "STATUS:RecDir pubkey is valid pubkey:\"$recFileLine\"";
+ else
+ ###### F: throw warning;
+ yell "ERROR:Invalid recipient file detected. Not modifying recipient list."
+ updateRecipients="false";
+ fi;
+ done
+ #### Write updated recPubKeysValid array to recPubKeysValid if no failure detected
+ if ! [[ "$updateRecipients" = "false" ]]; then
+ recPubKeysValid=("${candRecPubKeysValid[@]}") && vbm "STATUS:Wrote candRecPubkeysValid to recPubKeysValid:\"${recPubKeysValid[*]}\"";
+ fi;
+ else
+ yell "ERROR:$0:Recipient directory $argRecDir does not exist. Exiting."; exit 1;
+ fi;
+ fi;
+ # Handle case if '-R' set but '-e' not set
+ if [[ ! "$optionEncrypt" = "true" ]] && [[ "$optionRecDir" = "true" ]]; then
+ yell "ERROR: \\'-R\\' is set but \\'-e\\' is not set."; fi;
+} # Update recPubKeysValid with argRecDir
+magicParseRecipientArgs() {
+ # Desc: Parses recipient arguments specified by '-r' option
+ # Input: vars: optionEncrypt, optionRecipients
+ # arry: argRecPubKeys from processArguments()
+ # Output: vars: cmd_encrypt, cmd_encrypt_suffix
+ # arry: recPubKeysValid, recPubKeysValidStatic
+ # Depends: checkapp(), checkAgePubkey(), validateInput(), processArguments()
+ local recipients
+
+ # Check if encryption option active.
+ if [[ "$optionEncrypt" = "true" ]] && [[ "$optionRecipients" = "true" ]]; then
+ if checkapp age; then # Check that age is available.
+ for pubkey in "${argRecPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
+ vbm "DEBUG:Testing pubkey string:$pubkey";
+ if checkAgePubkey "$pubkey" && \
+ ( validateInput "$pubkey" "ssh_pubkey" || validateInput "$pubkey" "age_pubkey"); then
+ #### Form age recipient string
+ recipients="$recipients""-r '$pubkey' ";
+ vbm "STATUS:Added pubkey for forming age recipient string:""$pubkey";
+ vbm "DEBUG:recipients:""$recipients";
+ #### Add validated pubkey to recPubKeysValid array
+ recPubKeysValid+=("$pubkey") && vbm "DEBUG:recPubkeysValid:pubkey added:$pubkey";
+ else
+ yell "ERROR:Exit code ""$?"". Invalid recipient pubkey string. Exiting."; exit 1;
+ fi;
+ done
+ vbm "DEBUG:Finished processing argRecPubKeys array";
+ vbm "STATUS:Array of validated pubkeys:${recPubKeysValid[*]}";
+ recPubKeysValidStatic=("${recPubKeysValid[@]}"); # Save static image of pubkeys validated by this function
+
+ ## Form age command string
+ cmd_encrypt="age ""$recipients " && vbm "cmd_encrypt:$cmd_encrypt";
+ cmd_encrypt_suffix=".age" && vbm "cmd_encrypt_suffix:$cmd_encrypt_suffix";
+ else
+ yell "ERROR:Encryption enabled but \"age\" not found. Exiting."; exit 1;
+ fi;
+ else
+ cmd_encrypt="tee /dev/null " && vbm "cmd_encrypt:$cmd_encrypt";
+ cmd_encrypt_suffix="" && vbm "cmd_encrypt_suffix:$cmd_encrypt_suffix";
+ vbm "DEBUG:Encryption not enabled."
+ fi;
+ # Catch case if '-e' is set but '-r' or '-R' is not
+ if [[ "$optionEncrypt" = "true" ]] && [[ ! "$optionRecipients" = "true" ]]; then
+ yell "ERROR:\\'-e\\' set but no \\'-r\\' or \\'-R\\' set."; exit 1; fi;
+ # Catch case if '-r' or '-R' set but '-e' is not
+ if [[ ! "$optionEncrypt" = "true" ]] && [[ "$optionRecipients" = "true" ]]; then
+ yell "ERROR:\\'-r\\' or \\'-R\\' set but \\'-e\\' is not set."; exit 1; fi;
+} # Populate recPubKeysValid with argRecPubKeys; form encryption cmd string and filename suffix
+magicParseCompressionArg() {
+ # Desc: Parses compression arguments specified by '-c' option
+ # Input: vars: optionCompress
+ # Output: cmd_compress, cmd_compress_suffix
+ # Depends: checkapp(), vbm(), gzip,
+ if [[ "$optionCompress" = "true" ]]; then # Check if compression option active
+ if checkapp gzip; then # Check if gzip available
+ cmd_compress="gzip " && vbm "cmd_compress:$cmd_compress";
+ cmd_compress_suffix=".gz" && vbm "cmd_compress_suffix:$cmd_compress_suffix";
+ else
+ yell "ERROR:Compression enabled but \"gzip\" not found. Exiting."; exit 1;
+ fi
+ else
+ cmd_compress="tee /dev/null " && vbm "cmd_compress:$cmd_compress";
+ cmd_compress_suffix="" && vbm "cmd_compress_suffix:$cmd_compress_suffix";
+ vbm "DEBUG:Compression not enabled.";
+ fi
+} # Form compression cmd string and filename suffix
+magicInitWorkingDir() {
+ # Desc: Determine temporary working directory from defaults or user input
+ # Usage: magicInitWorkingDir
+ # Input: vars: optionTmpDir, argTempDirPriority, dirTmpDefault
+ # Input: vars: scriptTimeStart
+ # Output: vars: dir_tmp
+ # Depends: processArguments(), vbm(), yell()
+ # Parse '-t' option (user-specified temporary working dir)
+ ## Set dir_tmp_parent to user-specified value if specified
+ local dir_tmp_parent
+
+ if [[ "$optionTmpDir" = "true" ]]; then
+ if [[ -d "$argTempDirPriority" ]]; then
+ dir_tmp_parent="$argTempDirPriority";
+ else
+ yell "WARNING:Specified temporary working directory not valid:$argTempDirPriority";
+ exit 1; # Exit since user requires a specific temp dir and it is not available.
+ fi;
+ else
+ ## Set dir_tmp_parent to default or fallback otherwise
+ if [[ -d "$dirTmpDefault" ]]; then
+ dir_tmp_parent="$dirTmpDefault";
+ elif [[ -d /tmp ]]; then
+ yell "WARNING:$dirTmpDefault not available. Falling back to /tmp .";
+ dir_tmp_parent="/tmp";
+ else
+ yell "ERROR:No valid working directory available. Exiting.";
+ exit 1;
+ fi
+ fi;
+ ## Set dir_tmp using dir_tmp_parent and nonce (scriptTimeStart)
+ dir_tmp="$dir_tmp_parent"/"$scriptTimeStart""..bkgpslog" && vbm "DEBUG:Set dir_tmp to:$dir_tmp"; # Note: removed at end of main().
+} # Sets working dir
+magicParseCustomTTL() {
+ # Desc: Set user-specified TTLs for buffer and script
+ # Input: vars: argCustomBufferTTL (integer), argCustomScriptTTL_TE (string)
+ # Input: vars: optionCustomBufferTTL, optionCustomScriptTTL_TE
+ # Input: vars: bufferTTL (integer), scriptTTL_TE (string)
+ # Output: bufferTTL (integer), scriptTTL_TE (string)
+ # Depends validateInput(), showUsage(), yell
+
+ # React to '-b, --buffer-ttl' option
+ if [[ "$optionCustomBufferTTL" = "true" ]]; then
+ ## T: Check if argCustomBufferTTL is an integer
+ if validateInput "$argCustomBufferTTL" "integer"; then
+ ### T: argCustomBufferTTL is an integer
+ bufferTTL="$argCustomBufferTTL" && vbm "Custom bufferTTL from -b:$bufferTTL";
+ else
+ ### F: argcustomBufferTTL is not an integer
+ yell "ERROR:Invalid integer argument for custom buffer time-to-live."; showUsage; exit 1;
+ fi;
+ ## F: do not change bufferTTL
+ fi;
+
+ # React to '-B, --script-ttl' option
+ if [[ "$optionCustomScriptTTL_TE" = "true" ]]; then
+ ## T: Check if argCustomScriptTTL is a time element (ex: "day", "hour")
+ if validateInput "$argCustomScriptTTL" "time_element"; then
+ ### T: argCustomScriptTTL is a time element
+ scriptTTL_TE="$argCustomScriptTTL" && vbm "Custom scriptTTL_TE from -B:$scriptTTL_TE";
+ else
+ ### F: argcustomScriptTTL is not a time element
+ yell "ERROR:Invalid time element argument for custom script time-to-live."; showUsage; exit 1;
+ fi;
+ ## F: do not change scriptTTL_TE
+ fi;
+} # Sets custom script or buffer TTL if specified
+
+
+main() {
+ # DEBUG: Print environment variables
+ vbm "echo $(printenv)";
+ # Process arguments
+ processArguments "$@";
+ ## Act upon arguments
+ ### Determine working directory
+ magicInitWorkingDir; # Sets dir_tmp from argTempDirPriority
+ ### Set output encryption and compression option strings
+ #### React to "-r" ("encryption recipients") option
+ magicParseRecipientArgs; # Updates recPubKeysValid, cmd_encrypt[_suffix] from argRecPubKeys
+ #### React to "-c" ("compression") option
+ magicParseCompressionArg; # Updates cmd_compress[_suffix]
+ #### React to "-R" ("recipient directory") option
+ magicParseRecipientDir; # Updates recPubKeysValid
+ #### React to custom buffer and script TTL options ("-b", "-B")
+ magicParseCustomTTL; # Sets custom scriptTTL_TE and/or bufferTTL if specified
+
+ # Check that critical apps and dirs are available, display missing ones.
+ if ! checkapp gpspipe tar && ! checkdir "$dirOut" "dir_tmp"; then
+ yell "ERROR:Critical components missing.";
+ displayMissing; yell "Exiting."; exit 1; fi
+
+ # Set script lifespan (scriptTTL from scriptTTL_TE)
+ magicSetScriptTTL "$scriptTTL_TE";
+ ## Note: scriptTTL_TE is time element string (ex: "day") while scriptTTL is integer seconds
+
+ # File name substring (ISO-8601 duration from bufferTTL)
+ bufferTTL_STR="$(timeDuration "$bufferTTL")" && vbm "DEBUG:bufferTTL_STR:$bufferTTL_STR";
+
+ # Init temp working dir
+ try mkdir "$dir_tmp" && vbm "DEBUG:Working dir created at dir_tmp:$dir_tmp";
+
+ # Initialize 'tar' archive
+ ## Define output tar path (note: each day gets *one* tar file (Ex: "20200731..hostname_location.[.gpx.gz].tar"))
+ pathout_tar="$dirOut"/"$(dateShort "$(date --date="$bufferTTL seconds ago" --iso-8601=seconds)")".."$scriptHostname""_location""$cmd_compress_suffix""$cmd_encrypt_suffix".tar && \
+ vbm "STATUS:Set pathout_tar to:$pathout_tar";
+ ## Check that pathout_tar is a tar. Rename old and create empty one otherwise.
+ checkMakeTar "$pathout_tar" && vbm "DEBUG:Confirmed or Created to be a tar:$pathout_tar";
+ ## Append VERSION file to pathout_tar
+ magicWriteVersion;
+
+ # Define GPS conversion commands
+ cmd_conv_nmea="tee /dev/null " && vbm "STATUS:Set cmd_conv_nmea to:$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
+
+ # MAIN LOOP:Record gps data until script lifespan ends
+ timeBufferFirstNS="$(timeEpochNS)"; bufferRound=0; bufferTTL_AdjFloat="$bufferTTL";
+ while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
+ if ! [[ -d "$dir_tmp" ]]; then yell "ERROR:dir_tmp existence failure:$dir_tmp"; try mkdir "$dir_tmp" && vbm "DEBUG:Working dir recreated dir_tmp:$dir_tmp"; fi
+ magicParseRecipientDir;
+ magicGatherWriteBuffer &
+ sleep "$bufferTTL_AdjFloat"; # adjusted by magicBufferSleepPID
+ ((bufferRound++));
+ magicBufferSleepPID; # Calculates bufferTTL_AdjFloat from bufferTTL given buffer expected start time vs. actual
+ done
+
+ # Cleanup
+ ## Remove dir_tmp
+ try rm -r "$dir_tmp" && vbm "Removed dir_tmp:$dir_tmp";
+
+ vbm "STATUS:Main function finished.";
} # Main function.
#===END Declare local script functions===
#==END Define script parameters==
exit 0;
#==END Perform work and exit==
-
-
- #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;
+# Author: Steven Baltakatei Sandoval;
+# License: GPLv3+
projects / EVA-2020-02.git / blobdiff