exec/bkgpslog

   1 #!/bin/bash
   2
   3 # Desc: Records gps data until midnight
   4 # Author: Steven Baltakatei Sandoval; License: GPLv3+
   5 # Usage: bkgpslog -o [output dir]
   6
   7 #==BEGIN Define script parameters==
   8 ## Logging Behavior parameters
   9 BUFFER_TTL="300"; # time between file writes
  10 SCRIPT_TTL="day"; # (day|hour)
  11 #### TZ="UTC"; export TZ; # Default time zone; overridden by '--time-zone=[str]' option
  12 DIR_TMP_DEFAULT="/dev/shm"; # Default parent of working directory
  13
  14 SCRIPT_TIME_START=$(date +%Y%m%dT%H%M%S.%N);
  15 PATH="$HOME/.local/bin:$PATH";   # Add "$(systemd-path user-binaries)" path in case apps saved there
  16 SCRIPT_HOSTNAME=$(hostname);     # Save hostname of system running this script.
  17 SCRIPT_VERSION="0.3.7";          # Define version of script.
  18 SCRIPT_NAME="bkgpslog";          # Define basename of script file.
  19 SCRIPT_URL="https://gitlab.com/baltakatei/ninfacyzga-01"; # Define wesite hosting this script.
  20 AGE_VERSION="1.0.0-beta2";       # Define version of age (encryption program)
  21 AGE_URL="https://github.com/FiloSottile/age/releases/tag/v1.0.0-beta2"; # Define website hosting age.
  22
  23 declare -Ag appRollCall # Associative array for storing app status
  24 declare -Ag fileRollCall # Associative array for storing file status
  25 declare -Ag dirRollCall # Associative array for storing dir status
  26 declare -a recPubKeys # for processArguments function
  27 declare recipients # for main function
  28
  29 ## Initialize variables
  30 OPTION_VERBOSE=""; OPTION_ENCRYPT=""; OPTION_COMPRESS=""; OPTION_TMPDIR="";
  31
  32 #===BEGIN Declare local script functions===
  33 checkapp() {
  34     # Desc: If arg is a command, save result in assoc array 'appRollCall'
  35     # Usage: checkapp arg1 arg2 arg3 ...
  36     # Input: global assoc. array 'appRollCall'
  37     # Output: adds/updates key(value) to global assoc array 'appRollCall'
  38     local returnState
  39     #echo "DEBUG:$(date +%S.%N)..Starting checkapp function."
  40     #echo "DEBUG:args: $@"
  41     #echo "DEBUG:returnState:$returnState"
  42
  43     #===Process Args===
  44     for arg in "$@"; do
  45         #echo "DEBUG:processing arg:$arg"
  46         if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
  47             appRollCall[$arg]="true";
  48             #echo "DEBUG:appRollCall[$arg]:"${appRollCall[$arg]}
  49             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  50         else
  51             appRollCall[$arg]="false"; returnState="false";
  52         fi
  53     done
  54
  55     #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
  56     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
  57
  58     #===Determine function return code===
  59     if [ "$returnState" = "true" ]; then
  60         #echo "DEBUG:checkapp returns true for $arg";
  61         return 0;
  62     else
  63         #echo "DEBUG:checkapp returns false for $arg";
  64         return 1;
  65     fi
  66 } # Check that app exists
  67 checkfile() {
  68     # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
  69     # Usage: checkfile arg1 arg2 arg3 ...
  70     # Input: global assoc. array 'fileRollCall'
  71     # Output: adds/updates key(value) to global assoc array 'fileRollCall';
  72     # Output: returns 0 if app found, 1 otherwise
  73     local returnState
  74
  75     #===Process Args===
  76     for arg in "$@"; do
  77         #echo "DEBUG:processing arg:$arg"
  78         if [ -f "$arg" ]; then
  79             fileRollCall["$arg"]="true";
  80             #echo "DEBUG:fileRollCall[\"$arg\"]:"${fileRollCall["$arg"]}
  81             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  82         else
  83             fileRollCall["$arg"]="false"; returnState="false";
  84         fi
  85     done
  86
  87     #for key in "${!fileRollCall[@]}"; do echo "DEBUG:fileRollCall key [$key] is:${fileRollCall[$key]}"; done
  88     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
  89
  90     #===Determine function return code===
  91     if [ "$returnState" = "true" ]; then
  92         #echo "DEBUG:checkapp returns true for $arg";
  93         return 0;
  94     else
  95         #echo "DEBUG:checkapp returns false for $arg";
  96         return 1;
  97     fi
  98 } # Check that file exists
  99 checkdir() {
 100     # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
 101     # Usage: checkdir arg1 arg2 arg3 ...
 102     # Input: global assoc. array 'dirRollCall'
 103     # Output: adds/updates key(value) to global assoc array 'dirRollCall';
 104     # Output: returns 0 if app found, 1 otherwise
 105     local returnState
 106
 107     #===Process Args===
 108     for arg in "$@"; do
 109         #echo "DEBUG:processing arg:$arg"
 110         if [ -d "$arg" ]; then
 111             dirRollCall["$arg"]="true";
 112             #echo "DEBUG:dirRollCall[\"$arg\"]:"${dirRollCall["$arg"]}
 113             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
 114         elif [ "$arg" = "" ]; then
 115             dirRollCall["$arg"]="false"; returnState="false";
 116         else
 117             returnState="false";
 118         fi
 119     done
 120
 121     #for key in "${!dirRollCall[@]}"; do echo "DEBUG:dirRollCall key [$key] is:${dirRollCall[$key]}"; done
 122     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
 123
 124     #===Determine function return code===
 125     if [ "$returnState" = "true" ]; then
 126         #echo "DEBUG:checkapp returns true for $arg";
 127         return 0;
 128     else
 129         #echo "DEBUG:checkapp returns false for $arg";
 130         return 1;
 131     fi
 132 } # Check that dir exists
 133
 134 # Yell, Die, Try Three-Fingered Claw technique
 135 # Ref/Attrib: https://stackoverflow.com/a/25515370
 136 yell() { echo "$0: $*" >&2; }
 137 die() { yell "$*"; exit 111; }
 138 try() { "$@" || die "cannot $*"; }
 139
 140 echoerr() {
 141     echo "$@" 1>&2; # Define stderr echo function.
 142 } # Define stderr message function.
 143 showUsage() {
 144     echoerr "USAGE:"
 145     echoerr "    bkgpslog [ options ]"
 146     echoerr
 147     echoerr "OPTIONS:"
 148     echoerr "    -h, --help"
 149     echoerr "            Display help information."
 150     echoerr
 151     echoerr "    --version"
 152     echoerr "            Display script version."
 153     echoerr
 154     echoerr "    -v, --verbose"
 155     echoerr "            Display debugging info."
 156     echoerr
 157     echoerr "    -e, --encrypt"
 158     echoerr "            Encrypt output."
 159     echoerr
 160     echoerr "    -r, --recipient [ pubkey string ]"
 161     echoerr "            Specify recipient. May be age or ssh pubkey."
 162     echoerr "            See https://github.com/FiloSottile/age"
 163     echoerr
 164     echoerr "    -o, --output [ directory ]"
 165     echoerr "            Specify output directory to save logs."
 166     echoerr
 167     echoerr "    -c, --compress"
 168     echoerr "            Compress output with gzip (before encryption if enabled)."
 169     echoerr
 170     echoerr "    -z, --time-zone"
 171     echoerr "            Specify time zone. (ex: \"America/New_York\")"
 172     echoerr
 173     echoerr "    -t, --temp-dir"
 174     echoerr "            Specify parent directory for temporary working directory."
 175     echoerr "            Default: \"/dev/shm\""
 176     echoerr
 177     echoerr "EXAMPLE: (bash script lines)"
 178     echoerr "/bin/bash bkgpslog -e -c \\"
 179     echoerr "-r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \\"
 180     echoerr "-r age1ala848kqrvxc88rzaauc6vc5v0fqrvef9dxyk79m0vjea3hagclswu0lgq \\"
 181     echoerr "-o ~/Sync/Location"
 182 } # Display information on how to use this script.
 183 showVersion() {
 184     echoerr "$SCRIPT_VERSION"
 185 } # Display script version.
 186 vbm() {
 187     # Usage: vbm "DEBUG:verbose message here"
 188     # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true".
 189     # Input:
 190     #   - OPTION_VERBOSE  variable set by processArguments function. (ex: "true", "false")
 191     #   - "$@"            positional arguments fed to this function.
 192     # Output: stderr
 193     # Script function dependencies: echoerr
 194     # External function dependencies: echo
 195     # Last modified: 2020-04-11T23:57Z
 196     # Last modified by: Steven Baltakatei Sandoval
 197     # License: GPLv3+
 198     # Ref./Attrib:
 199
 200     if [ "$OPTION_VERBOSE" = "true" ]; then
 201         FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds.
 202         echoerr "[$FUNCTION_TIME] ""$*"; # Display argument text.
 203     fi
 204
 205     # End function
 206     return 0; # Function finished.
 207 } # Verbose message display function.
 208 processArguments() {
 209     while [ ! $# -eq 0 ]; do   # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
 210         #echoerr "DEBUG:Starting processArguments while loop."
 211         #echoerr "DEBUG:Provided arguments are:""$*"
 212         case "$1" in
 213             -h | --help) showUsage; exit 1;; # Display usage.
 214             --version) showVersion; exit 1;; # Show version
 215             -v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode.
 216             -o | --output) if [ -d "$2" ]; then DIR_OUT="$2"; vbm "DEBUG:DIR_OUT:$DIR_OUT"; shift; fi ;; # Define output directory.
 217             -e | --encrypt) OPTION_ENCRYPT="true"; vbm "DEBUG:Encrypted output mode enabled.";;
 218             -r | --recipient) # Add 'age' recipient via public key string
 219                 recPubKeys+=("$2"); vbm "STATUS:pubkey added:""$2"; shift;;
 220             -c | --compress) OPTION_COMPRESS="true"; vbm "DEBUG:Compressed output mode enabled.";;
 221             -z | --time-zone) try setTimeZoneEV "$2"; shift;;
 222             -t | --temp-dir) OPTION_TMPDIR="true" && TMP_DIR_PRIORITY="$2"; shift;;
 223             *) echoerr "ERROR: Unrecognized argument: $1"; echoerr "STATUS:All arguments:$*"; exit 1;; # Handle unrecognized options.
 224         esac
 225         shift
 226     done
 227 } # Argument Processing
 228 setTimeZoneEV(){
 229     # Desc: Set time zone environment variable TZ
 230     # Usage: setTimeZoneEV arg1
 231     # Input: arg1: 'date'-compatible timezone string (ex: "America/New_York")
 232     #        TZDIR env var (optional; default: "/usr/share/zoneinfo")
 233     # Output: exports TZ
 234     #         exit code 0 on success
 235     #         exit code 1 on incorrect number of arguments
 236     #         exit code 2 if unable to validate arg1
 237     # Depends: yell, printenv, bash 5
 238     # Tested on: Debian 10
 239     ARG1="$1"
 240     local tzDir returnState
 241     if ! [[ $# -eq 1 ]]; then
 242         yell "ERROR:Invalid argument count.";
 243         return 1;
 244     fi
 245
 246     # Read TZDIR env var if available
 247     if printenv TZDIR 1>/dev/null 2>&1; then
 248         tzDir="$(printenv TZDIR)";
 249     else
 250         tzDir="/usr/share/zoneinfo";
 251     fi
 252
 253     # Validate TZ string
 254     if ! [[ -f "$tzDir"/"$ARG1" ]]; then
 255         yell "ERROR:Invalid time zone argument.";
 256         return 2;
 257     else
 258     # Export ARG1 as TZ environment variable
 259         TZ="$ARG1" && export TZ && returnState="true";
 260     fi
 261
 262     # Determine function return code
 263     if [ "$returnState" = "true" ]; then
 264         return 0;
 265     fi
 266 } # Exports TZ environment variable
 267 timeUntilNextDay(){
 268     # Desc: Report seconds until next day.
 269     # Version: 1.0.0
 270     # Output: stdout: integer seconds until next day
 271     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 272     # Usage: timeUntilNextDay
 273     # Usage: if ! myTTL="$(timeUntilNextDay)"; then yell "ERROR in if statement"; exit 1; fi
 274     # Depends: date 8, echo 8, yell, try
 275
 276     local returnState TIME_CURRENT TIME_NEXT_DAY SECONDS_UNTIL_NEXT_DAY
 277
 278     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 279     TIME_NEXT_DAY="$(date -d "$TIME_CURRENT next day" --iso-8601=date)"; # Produce timestamp of beginning of tomorrow with resolution of 1 second.
 280     SECONDS_UNTIL_NEXT_DAY="$(( $(date +%s -d "$TIME_NEXT_DAY") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
 281     if [[ "$SECONDS_UNTIL_NEXT_DAY" -gt 0 ]]; then
 282         returnState="true";
 283     elif [[ "$SECONDS_UNTIL_NEXT_DAY" -eq 0 ]]; then
 284         returnState="warning_zero";
 285         yell "WARNING:Reported time until next day exactly zero.";
 286     elif [[ "$SECONDS_UNTIL_NEXT_DAY" -lt 0 ]]; then
 287         returnState="warning_negative";
 288         yell "WARNING:Reported time until next day is negative.";
 289     fi
 290
 291     try echo "$SECONDS_UNTIL_NEXT_DAY"; # Report
 292
 293     # Determine function return code
 294     if [[ "$returnState" = "true" ]]; then
 295         return 0;
 296     elif [[ "$returnState" = "warning_zero" ]]; then
 297         return 1;
 298     elif [[ "$returnState" = "warning_negative" ]]; then
 299         return 2;
 300     fi
 301 } # Report seconds until next day
 302 timeUntilNextHour(){
 303     # Desc: Report seconds until next hour
 304     # Version 1.0.0
 305     # Output: stdout: integer seconds until next hour
 306     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 307     # Usage: timeUntilNextHour
 308     # Usage: if ! myTTL="$(timeUntilNextHour)"; then yell "ERROR in if statement"; exit 1; fi
 309
 310     local returnState TIME_CURRENT TIME_NEXT_HOUR SECONDS_UNTIL_NEXT_HOUR
 311     TIME_CURRENT="$(date --iso-8601=seconds)"; # Produce `date`-parsable current timestamp with resolution of 1 second.
 312     TIME_NEXT_HOUR="$(date -d "$TIME_CURRENT next hour" --iso-8601=hours)"; # Produce `date`-parsable current time stamp with resolution of 1 second.
 313     SECONDS_UNTIL_NEXT_HOUR="$(( $(date +%s -d "$TIME_NEXT_HOUR") - $(date +%s -d "$TIME_CURRENT") ))"; # Calculate seconds until next hour (res. 1 second).
 314     if [[ "$SECONDS_UNTIL_NEXT_HOUR" -gt 0 ]]; then
 315         returnState="true";
 316     elif [[ "$SECONDS_UNTIL_NEXT_HOUR" -eq 0 ]]; then
 317         returnState="warning_zero";
 318         yell "WARNING:Reported time until next hour exactly zero.";
 319     elif [[ "$SECONDS_UNTIL_NEXT_HOUR" -lt 0 ]]; then
 320         returnState="warning_negative";
 321         yell "WARNING:Reported time until next hour is negative.";
 322     fi
 323
 324     try echo "$SECONDS_UNTIL_NEXT_HOUR"; # Report
 325
 326     # Determine function return code
 327     if [[ "$returnState" = "true" ]]; then
 328         return 0;
 329     elif [[ "$returnState" = "warning_zero" ]]; then
 330         return 1;
 331     elif [[ "$returnState" = "warning_negative" ]]; then
 332         return 2;
 333     fi
 334 } # Report seconds until next hour
 335 dateTimeShort(){
 336     # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz)
 337     # Usage: dateTimeShort ([str date])
 338     # Version 1.1.0
 339     # Input: arg1: 'date'-parsable timestamp string (optional)
 340     # Output: stdout: timestamp (ISO-8601, no separators)
 341     # Depends: yell
 342     local TIME_CURRENT TIME_CURRENT_SHORT
 343
 344     argTime="$1";
 345     # Get Current Time
 346     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 347     # Decide to parse current or supplied date
 348     ## Check if time argument empty
 349     if [[ -z "$argTime" ]]; then
 350         ## T: Time argument empty, use current time
 351         TIME_INPUT="$TIME_CURRENT";
 352     else
 353         ## F: Time argument exists, validate time
 354         if date --date="$argTime" 1>/dev/null 2>&1; then
 355             ### T: Time argument is valid; use it
 356             TIME_INPUT="$argTime";
 357         else
 358             ### F: Time argument not valid; exit
 359             yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
 360         fi
 361     fi
 362     # Construct and deliver separator-les date string
 363     TIME_CURRENT_SHORT="$(date -d "$TIME_INPUT" +%Y%m%dT%H%M%S%z)";
 364     echo "$TIME_CURRENT_SHORT";
 365 } # Get YYYYmmddTHHMMSS±zzzz
 366 dateShort(){
 367     # Desc: Date without separators (YYYYmmdd)
 368     # Usage: dateShort ([str date])
 369     # Version: 1.1.0
 370     # Input: arg1: 'date'-parsable timestamp string (optional)
 371     # Output: stdout: date (ISO-8601, no separators)
 372     # Depends: yell
 373     local TIME_CURRENT DATE_CURRENT_SHORT
 374
 375     argTime="$1";
 376     # Get Current Time
 377     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 378     # Decide to parse current or supplied date
 379     ## Check if time argument empty
 380     if [[ -z "$argTime" ]]; then
 381         ## T: Time argument empty, use current time
 382         TIME_INPUT="$TIME_CURRENT";
 383     else
 384         ## F: Time argument exists, validate time
 385         if date --date="$argTime" 1>/dev/null 2>&1; then
 386             ### T: Time argument is valid; use it
 387             TIME_INPUT="$argTime";
 388         else
 389             ### F: Time argument not valid; exit
 390             yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
 391         fi
 392     fi
 393     # Construct and deliver separator-les date string
 394     DATE_CURRENT_SHORT="$(date -d "$TIME_INPUT" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day.
 395     echo "$DATE_CURRENT_SHORT";
 396 } # Get YYYYmmdd
 397 timeDuration(){
 398     # Desc: Given seconds, output ISO-8601 duration string
 399     # Ref/Attrib: ISO-8601:2004(E), §4.4.4.2 Representations of time intervals by duration and context information
 400     # Note: "1 month" ("P1M") is assumed to be "30 days" (see ISO-8601:2004(E), §2.2.1.2)
 401     # Usage: timeDuration [1:seconds] ([2:precision])
 402     # Version: 1.0.3
 403     # Input: arg1: seconds as base 10 integer >= 0  (ex: 3601)
 404     #        arg2: precision level (optional; default=2)
 405     # Output: stdout: ISO-8601 duration string (ex: "P1H1S", "P2Y10M15DT10H30M20S")
 406     #         exit code 0: success
 407     #         exit code 1: error_input
 408     #         exit code 2: error_unknown
 409     # Example: 'timeDuration 111111 3' yields 'P1DT6H51M'
 410     # Depends: date 8 (gnucoreutils), yell,
 411     local returnState argSeconds argPrecision remainder precision witherPrecision
 412     local fullYears fullMonths fullDays fullHours fullMinutes fullSeconds
 413     local displayYears displayMonths displayDays displayHours displayMinutes displaySeconds
 414     local hasYears hasMonths hasDays hasHours hasMinutes hasSeconds
 415
 416     argSeconds="$1"; # read arg1 (seconds)
 417     argPrecision="$2"; # read arg2 (precision)
 418     precision=2; # set default precision
 419
 420     # Check that between one and two arguments is supplied
 421     if ! { [[ $# -ge 1 ]] && [[ $# -le 2 ]]; }; then
 422         yell "ERROR:Invalid number of arguments:$# . Exiting.";
 423         returnState="error_input"; fi
 424
 425     # Check that argSeconds provided
 426     if [[ $# -ge 1 ]]; then
 427         ## Check that argSeconds is a positive integer
 428         if [[ "$argSeconds" =~ ^[[:digit:]]+$ ]]; then
 429             :
 430         else
 431             yell "ERROR:argSeconds not a digit.";
 432             returnState="error_input";
 433         fi
 434     else
 435         yell "ERROR:No argument provided. Exiting.";
 436         exit 1;
 437     fi
 438
 439     # Consider whether argPrecision was provided
 440     if  [[ $# -eq 2 ]]; then
 441         # Check that argPrecision is a positive integer
 442         if [[ "$argPrecision" =~ ^[[:digit:]]+$ ]] && [[ "$argPrecision" -gt 0 ]]; then
 443         precision="$argPrecision";
 444         else
 445             yell "ERROR:argPrecision not a positive integer. (is $argPrecision ). Leaving early.";
 446             returnState="error_input";
 447         fi;
 448     else
 449         :
 450     fi;
 451
 452     remainder="$argSeconds" ; # seconds
 453     ## Calculate full years Y, update remainder
 454     fullYears=$(( remainder / (365*24*60*60) ));
 455     remainder=$(( remainder - (fullYears*365*24*60*60) ));
 456     ## Calculate full months M, update remainder
 457     fullMonths=$(( remainder / (30*24*60*60) ));
 458     remainder=$(( remainder - (fullMonths*30*24*60*60) ));
 459     ## Calculate full days D, update remainder
 460     fullDays=$(( remainder / (24*60*60) ));
 461     remainder=$(( remainder - (fullDays*24*60*60) ));
 462     ## Calculate full hours H, update remainder
 463     fullHours=$(( remainder / (60*60) ));
 464     remainder=$(( remainder - (fullHours*60*60) ));
 465     ## Calculate full minutes M, update remainder
 466     fullMinutes=$(( remainder / (60) ));
 467     remainder=$(( remainder - (fullMinutes*60) ));
 468     ## Calculate full seconds S, update remainder
 469     fullSeconds=$(( remainder / (1) ));
 470     remainder=$(( remainder - (remainder*1) ));
 471     ## Check which fields filled
 472     if [[ $fullYears -gt 0 ]]; then hasYears="true"; else hasYears="false"; fi
 473     if [[ $fullMonths -gt 0 ]]; then hasMonths="true"; else hasMonths="false"; fi
 474     if [[ $fullDays -gt 0 ]]; then hasDays="true"; else hasDays="false"; fi
 475     if [[ $fullHours -gt 0 ]]; then hasHours="true"; else hasHours="false"; fi
 476     if [[ $fullMinutes -gt 0 ]]; then hasMinutes="true"; else hasMinutes="false"; fi
 477     if [[ $fullSeconds -gt 0 ]]; then hasSeconds="true"; else hasSeconds="false"; fi
 478
 479     ## Determine which fields to display (see ISO-8601:2004 §4.4.3.2)
 480     witherPrecision="false"
 481
 482     ### Years
 483     if $hasYears && [[ $precision -gt 0 ]]; then
 484         displayYears="true";
 485         witherPrecision="true";
 486     else
 487         displayYears="false";
 488     fi;
 489     if $witherPrecision; then ((precision--)); fi;
 490
 491     ### Months
 492     if $hasMonths && [[ $precision -gt 0 ]]; then
 493         displayMonths="true";
 494         witherPrecision="true";
 495     else
 496         displayMonths="false";
 497     fi;
 498     if $witherPrecision && [[ $precision -gt 0 ]]; then
 499         displayMonths="true";
 500     fi;
 501     if $witherPrecision; then ((precision--)); fi;
 502
 503     ### Days
 504     if $hasDays && [[ $precision -gt 0 ]]; then
 505         displayDays="true";
 506         witherPrecision="true";
 507     else
 508         displayDays="false";
 509     fi;
 510     if $witherPrecision && [[ $precision -gt 0 ]]; then
 511         displayDays="true";
 512     fi;
 513     if $witherPrecision; then ((precision--)); fi;
 514
 515     ### Hours
 516     if $hasHours && [[ $precision -gt 0 ]]; then
 517         displayHours="true";
 518         witherPrecision="true";
 519     else
 520         displayHours="false";
 521     fi;
 522     if $witherPrecision && [[ $precision -gt 0 ]]; then
 523         displayHours="true";
 524     fi;
 525     if $witherPrecision; then ((precision--)); fi;
 526
 527     ### Minutes
 528     if $hasMinutes && [[ $precision -gt 0 ]]; then
 529         displayMinutes="true";
 530         witherPrecision="true";
 531     else
 532         displayMinutes="false";
 533     fi;
 534     if $witherPrecision && [[ $precision -gt 0 ]]; then
 535         displayMinutes="true";
 536     fi;
 537     if $witherPrecision; then ((precision--)); fi;
 538
 539     ### Seconds
 540
 541     if $hasSeconds && [[ $precision -gt 0 ]]; then
 542         displaySeconds="true";
 543         witherPrecision="true";
 544     else
 545         displaySeconds="false";
 546     fi;
 547     if $witherPrecision && [[ $precision -gt 0 ]]; then
 548         displaySeconds="true";
 549     fi;
 550     if $witherPrecision; then ((precision--)); fi;
 551
 552     ## Determine whether or not the "T" separator is needed to separate date and time elements
 553     if ( $displayHours || $displayMinutes || $displaySeconds); then
 554         displayDateTime="true"; else displayDateTime="false"; fi
 555
 556     ## Construct duration output string
 557     OUTPUT="P"
 558     if $displayYears; then
 559         OUTPUT=$OUTPUT$fullYears"Y"; fi
 560     if $displayMonths; then
 561         OUTPUT=$OUTPUT$fullMonths"M"; fi
 562     if $displayDays; then
 563         OUTPUT=$OUTPUT$fullDays"D"; fi
 564     if $displayDateTime; then
 565         OUTPUT=$OUTPUT"T"; fi
 566     if $displayHours; then
 567         OUTPUT=$OUTPUT$fullHours"H"; fi
 568     if $displayMinutes; then
 569         OUTPUT=$OUTPUT$fullMinutes"M"; fi
 570     if $displaySeconds; then
 571         OUTPUT=$OUTPUT$fullSeconds"S"; fi
 572
 573     ## Output duration string to stdout
 574     echo "$OUTPUT" && returnState="true";
 575
 576     #===Determine function return code===
 577     if [ "$returnState" = "true" ]; then
 578         return 0;
 579     elif [ "$returnState" = "error_input" ]; then
 580         yell "ERROR:input";
 581         return 1;
 582     else
 583         yell "ERROR:Unknown";
 584         return 2;
 585     fi
 586
 587 } # Get duration (ex: PT10M4S )
 588 displayMissing() {
 589     # Desc: Displays missing apps, files, and dirs
 590     # Usage: displayMissing
 591     # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
 592     # Output: stderr messages
 593     #==BEGIN Display errors==
 594     #===BEGIN Display Missing Apps===
 595     missingApps="Missing apps  :"
 596     #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
 597     for key in "${!appRollCall[@]}"; do
 598         value="${appRollCall[$key]}"
 599         if [ "$value" = "false" ]; then
 600             #echo "DEBUG:Missing apps: $key => $value";
 601             missingApps="$missingApps""$key "
 602             appMissing="true"
 603         fi
 604     done
 605     if [ "$appMissing" = "true" ]; then  # Only indicate if an app is missing.
 606         echo "$missingApps" 1>&2;
 607     fi
 608     #===END Display Missing Apps===
 609
 610     #===BEGIN Display Missing Files===
 611     missingFiles="Missing files:"
 612     #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
 613     for key in "${!fileRollCall[@]}"; do
 614         value="${fileRollCall[$key]}"
 615         if [ "$value" = "false" ]; then
 616             #echo "DEBUG:Missing files: $key => $value";
 617             missingFiles="$missingFiles""$key "
 618             fileMissing="true"
 619         fi
 620     done
 621     if [ "$fileMissing" = "true" ]; then  # Only indicate if an app is missing.
 622         echo "$missingFiles" 1>&2;
 623     fi
 624     #===END Display Missing Files===
 625
 626     #===BEGIN Display Missing Directories===
 627     missingDirs="Missing dirs:"
 628     #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
 629     for key in "${!dirRollCall[@]}"; do
 630         value="${dirRollCall[$key]}"
 631         if [ "$value" = "false" ]; then
 632             #echo "DEBUG:Missing dirs: $key => $value";
 633             missingDirs="$missingDirs""$key "
 634             dirMissing="true"
 635         fi
 636     done
 637     if [ "$dirMissing" = "true" ]; then  # Only indicate if an dir is missing.
 638         echo "$missingDirs" 1>&2;
 639     fi
 640     #===END Display Missing Directories===
 641
 642     #==END Display errors==
 643 } # Display missing apps, files, dirs
 644 setScriptTTL() {
 645     #Desc: Sets script TTL
 646     #Usage: setScriptTTL arg1
 647     #Input: arg1: "day" or "hour"
 648     #Output: scriptTTL
 649     #Depends: timeUntilNextHour or timeUntilNextDay
 650     local ARG1
 651     ARG1="$1"
 652     if [[ "$ARG1" = "day" ]]; then
 653             # Set script lifespan to end at start of next day
 654         if ! scriptTTL="$(timeUntilNextDay)"; then
 655             if [[ "$scriptTTL" -eq 0 ]]; then
 656             ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
 657             else
 658             yell "ERROR: timeUntilNextDay exit code $?"; exit 1;
 659             fi;
 660         fi;
 661     elif [[ "$ARG1" = "hour" ]]; then
 662         # Set script lifespan to end at start of next hour
 663         if ! scriptTTL="$(timeUntilNextHour)"; then
 664             if [[ "$scriptTTL" -eq 0 ]]; then
 665                 ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
 666             else
 667                 yell "ERROR: timeUntilNextHour exit code $?"; exit 1;
 668             fi;
 669         fi;
 670     else
 671         yell "ERROR:Invalid argument for setScriptTTL function."; exit 1;
 672     fi
 673 } # Seconds until next (day|hour).
 674 checkMakeTar() {
 675     # Desc: Checks that a valid tar archive exists, creates one otherwise
 676     # Usage: checkMakeTar [ path ]
 677     # Version: 1.0.1
 678     # Input: arg1: path of tar archive
 679     # Output: exit code 0 : tar readable
 680     #         exit code 1 : tar missing; created
 681     #         exit code 2 : tar not readable; moved; replaced
 682     # Depends: try, tar, date
 683     local PATH_TAR returnFlag0 returnFlag1 returnFlag2
 684     PATH_TAR="$1"
 685
 686     # Check if file is a valid tar archive
 687     if tar --list --file="$PATH_TAR" 1>/dev/null 2>&1; then
 688         ## T1: return success
 689         returnFlag0="tar valid";
 690     else
 691         ## F1: Check if file exists
 692         if [[ -f "$PATH_TAR" ]]; then
 693             ### T: Rename file
 694             try mv "$PATH_TAR" "$PATH_TAR""--broken--""$(date +%Y%m%dT%H%M%S)" && \
 695                 returnFlag1="tar moved";
 696         else
 697             ### F: -
 698             :
 699         fi
 700         ## F2: Create tar archive, return 0
 701         try tar --create --file="$PATH_TAR" --files-from=/dev/null && \
 702             returnFlag2="tar created";
 703     fi
 704
 705     # Determine function return code
 706     if [[ "$returnFlag0" = "tar valid" ]]; then
 707         return 0;
 708     elif [[ "$returnFlag2" = "tar created" ]] && ! [[ "$returnFlag1" = "tar moved" ]]; then
 709         return 1; # tar missing so created
 710     elif [[ "$returnFlag2" = "tar created" ]] && [[ "$returnFlag1" = "tar moved" ]]; then
 711         return 2; # tar not readable so moved; replaced
 712     fi
 713 } # checks if arg1 is tar; creates one otherwise
 714 appendArgTar(){
 715     # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
 716     # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
 717     # Version: 1.0.3
 718     # Input: arg1: data to be written
 719     #        arg2: file name of file to be inserted into tar
 720     #        arg3: tar archive path (must exist first)
 721     #        arg4: temporary working dir
 722     #        arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ")
 723     # Output: file written to disk
 724     # Example: decrypt multiple large files in parallel
 725     #          appendArgTar "$(cat /tmp/largefile1.gpg)" "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
 726     #          appendArgTar "$(cat /tmp/largefile2.gpg)" "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
 727     #          appendArgTar "$(cat /tmp/largefile3.gpg)" "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
 728     # Depends: bash 5
 729     # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
 730
 731     # Save function name
 732     local FN="${FUNCNAME[0]}";
 733     #yell "DEBUG:STATUS:$FN:Finished appendArgTar()."
 734
 735     # Set file name
 736     if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:$FN:Not enough arguments."; exit 1; fi
 737
 738     # Check tar path is a file
 739     if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:$FN:Tar archive arg not a file."; exit 1; fi
 740
 741     # Check temp dir arg
 742     if ! [ -z "$4" ]; then TMP_DIR="$4"; else yell "ERROR:$FN:No temporary working dir set."; exit 1; fi
 743
 744     # Set command strings
 745     if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1
 746     if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2
 747     if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3
 748     if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4
 749
 750     # Input command
 751     CMD0="echo \"\$1\""
 752
 753     # # Debug
 754     # yell "DEBUG:STATUS:$FN:CMD0:$CMD0"
 755     # yell "DEBUG:STATUS:$FN:CMD1:$CMD1"
 756     # yell "DEBUG:STATUS:$FN:CMD2:$CMD2"
 757     # yell "DEBUG:STATUS:$FN:CMD3:$CMD3"
 758     # yell "DEBUG:STATUS:$FN:CMD4:$CMD4"
 759     # yell "DEBUG:STATUS:$FN:FILENAME:$FILENAME"
 760     # yell "DEBUG:STATUS:$FN:TAR_PATH:$TAR_PATH"
 761     # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR"
 762
 763     # Write to temporary working dir
 764     eval "$CMD0"" | ""$CMD1"" | ""$CMD2"" | ""$CMD3"" | ""$CMD4" > "$TMP_DIR"/"$FILENAME";
 765
 766     # Append to tar
 767     try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME";
 768     #yell "DEBUG:STATUS:$FN:Finished appendArgTar()."
 769 } # Append Bash var to file appended to Tar archive
 770 appendFileTar(){
 771     # Desc: Processes first file and then appends to tar
 772     # Usage: appendFileTar [file path] [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
 773     # Version: 1.0.2
 774     # Input: arg1: path of file to be (processed and) written
 775     #        arg2: name to use for file inserted into tar
 776     #        arg3: tar archive path (must exist first)
 777     #        arg4: temporary working dir
 778     #        arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ")
 779     # Output: file written to disk
 780     # Example: decrypt multiple large files in parallel
 781     #          appendFileTar /tmp/largefile1.gpg "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
 782     #          appendFileTar /tmp/largefile2.gpg "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
 783     #          appendFileTar /tmp/largefile3.gpg "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
 784     # Depends: bash 5
 785
 786     # Save function name
 787     local FN="${FUNCNAME[0]}";
 788     #yell "DEBUG:STATUS:$FN:Finished appendFileTar()."
 789
 790     # Set file name
 791     if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:$FN:Not enough arguments."; exit 1; fi
 792     # Check tar path is a file
 793     if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:$FN:Tar archive arg not a file."; exit 1; fi
 794     # Check temp dir arg
 795     if ! [ -z "$4" ]; then TMP_DIR="$4"; else yell "ERROR:$FN:No temporary working dir set."; exit 1; fi
 796     # Set command strings
 797     if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1
 798     if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2
 799     if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3
 800     if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4
 801
 802     # Input command string
 803     CMD0="cat \"\$1\""
 804
 805     # # Debug
 806     # yell "DEBUG:STATUS:$FN:CMD0:$CMD0"
 807     # yell "DEBUG:STATUS:$FN:CMD1:$CMD1"
 808     # yell "DEBUG:STATUS:$FN:CMD2:$CMD2"
 809     # yell "DEBUG:STATUS:$FN:CMD3:$CMD3"
 810     # yell "DEBUG:STATUS:$FN:CMD4:$CMD4"
 811     # yell "DEBUG:STATUS:$FN:FILENAME:$FILENAME"
 812     # yell "DEBUG:STATUS:$FN:TAR_PATH:$TAR_PATH"
 813     # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR"
 814
 815     # Write to temporary working dir
 816     eval "$CMD0 | $CMD1 | $CMD2 | $CMD3 | $CMD4" > "$TMP_DIR"/"$FILENAME";
 817
 818     # Append to tar
 819     try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME";
 820     #yell "DEBUG:STATUS:$FN:Finished appendFileTar()."
 821 } # Append file to Tar archive
 822 magicWriteVersion() {
 823     # Desc: Appends time-stamped VERSION to PATHOUT_TAR
 824     # Usage: magicWriteVersion
 825     # Version: 0.1.0
 826     # Input: CONTENT_VERSION, FILEOUT_VERSION, PATHOUT_TAR, DIR_TMP
 827     # Input: SCRIPT_VERSION, SCRIPT_URL, AGE_VERSION, AGE_URL, SCRIPT_HOSTNAME
 828     # Output: appends tar PATHOUT_TAR
 829     # Depends: dateTimeShort, appendArgTar
 830     local CONTENT_VERSION pubKeyIndex
 831
 832     # Set VERSION file name
 833     FILEOUT_VERSION="$(dateTimeShort)..VERSION";
 834
 835     # Gather VERSION data in CONTENT_VERSION
 836     CONTENT_VERSION="SCRIPT_VERSION=$SCRIPT_VERSION";
 837     #CONTENT_VERSION="$CONTENT_VERSION""\\n";
 838     CONTENT_VERSION="$CONTENT_VERSION""\\n""SCRIPT_NAME=$SCRIPT_NAME";
 839     CONTENT_VERSION="$CONTENT_VERSION""\\n""SCRIPT_URL=$SCRIPT_URL";
 840     CONTENT_VERSION="$CONTENT_VERSION""\\n""AGE_VERSION=$AGE_VERSION";
 841     CONTENT_VERSION="$CONTENT_VERSION""\\n""AGE_URL=$AGE_URL";
 842     CONTENT_VERSION="$CONTENT_VERSION""\\n""DATE=$(date --iso-8601=seconds)";
 843     CONTENT_VERSION="$CONTENT_VERSION""\\n""HOSTNAME=$SCRIPT_HOSTNAME";
 844     ## Add list of recipient pubkeys
 845     for pubkey in "${recPubKeysValid[@]}"; do
 846         ((pubKeyIndex++))
 847         CONTENT_VERSION="$CONTENT_VERSION""\\n""PUBKEY_$pubKeyIndex=$pubkey";
 848     done
 849     ## Process newline escapes
 850     CONTENT_VERSION="$(echo -e "$CONTENT_VERSION")"
 851
 852     # Write CONTENT_VERSION as file FILEOUT_VERSION and write-append to PATHOUT_TAR
 853     appendArgTar "$CONTENT_VERSION" "$FILEOUT_VERSION" "$PATHOUT_TAR" "$DIR_TMP";
 854
 855 } # bkgpslog: write version data to PATHOUT_TAR via appendArgTar()
 856 magicGatherWriteBuffer() {
 857     # Desc: bkgpslog-specific meta function for writing data to DIR_TMP then appending each file to PATHOUT_TAR
 858     # Inputs: PATHOUT_TAR FILEOUT_{NMEA,GPX,KML} CMD_CONV_{NMEA,GPX,KML} CMD_{COMPRESS,ENCRYPT} DIR_TMP,
 859     # Inputs: BUFFER_TTL bufferTTL_STR SCRIPT_HOSTNAME CMD_COMPRESS_SUFFIX CMD_ENCRYPT_SUFFIX
 860     # Depends: yell, try, vbm, appendArgTar, tar
 861     local FN="${FUNCNAME[0]}";
 862     wait; # Wait to avoid collision with older magicWriteBuffer() instances (see https://www.tldp.org/LDP/abs/html/x9644.html )
 863     # Create buffer file with unique name
 864     PATHOUT_BUFFER="$DIR_TMP/buffer$SECONDS";
 865     # Fill buffer
 866     timeout "$BUFFER_TTL"s gpspipe -r -o "$PATHOUT_BUFFER" ;
 867     timeBufferStart="$(dateTimeShort  "$(date --date="$BUFFER_TTL seconds ago")")"; # Note start time
 868     vbm "DEBUG:STATUS:$FN:Started magicWriteBuffer().";
 869     # Determine file paths (time is start of buffer period)
 870     FILEOUT_BASENAME="$timeBufferStart""--""$bufferTTL_STR""..""$SCRIPT_HOSTNAME""_location" && vbm "STATUS:Set FILEOUT_BASENAME to:$FILEOUT_BASENAME";
 871     ## Files saved to DIR_TMP
 872     FILEOUT_NMEA="$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_NMEA to:$FILEOUT_NMEA";
 873     FILEOUT_GPX="$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_GPX to:$FILEOUT_GPX";
 874     FILEOUT_KML="$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" && vbm "STATUS:Set FILEOUT_KML to:$FILEOUT_KML";
 875     PATHOUT_NMEA="$DIR_TMP"/"$FILEOUT_NMEA" && vbm "STATUS:Set PATHOUT_NMEA to:$PATHOUT_NMEA";
 876     PATHOUT_GPX="$DIR_TMP"/"$FILEOUT_GPX" && vbm "STATUS:Set PATHOUT_GPX to:$PATHOUT_GPX";
 877     PATHOUT_KML="$DIR_TMP"/"$FILEOUT_KML" && vbm "STATUS:Set PATHOUT_KML to:$PATHOUT_KML";
 878     ## Files saved to disk (DIR_OUT)
 879     ### one file per day (Ex: "20200731..hostname_location.[.gpx.gz].tar")
 880     PATHOUT_TAR="$DIR_OUT"/"$(dateShort "$(date --date="$BUFFER_TTL seconds ago")")".."$SCRIPT_HOSTNAME""_location""$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX".tar && \
 881         vbm "STATUS:Set PATHOUT_TAR to:$PATHOUT_TAR";
 882     # DEBUG: check vars
 883     vbm "STATUS:DIR_TMP     :$DIR_TMP";
 884     vbm "STATUS:PATHOUT_TAR :$PATHOUT_TAR";
 885     vbm "STATUS:PATHOUT_NMEA:$PATHOUT_NMEA";
 886     vbm "STATUS:PATHOUT_GPX:$PATHOUT_GPX";
 887     vbm "STATUS:PATHOUT_KML:$PATHOUT_KML";
 888
 889
 890     # Validate PATHOUT_TAR as tar.
 891     checkMakeTar "$PATHOUT_TAR";
 892     ## Add VERSION file if checkMakeTar had to create a tar (exited 1) or replace one (exited 2)
 893     if [[ $? -eq 1 ]] || [[ $? -eq 2 ]]; then magicWriteVersion; fi
 894
 895     # Write bufferBash to PATHOUT_TAR
 896     appendFileTar "$PATHOUT_BUFFER" "$FILEOUT_NMEA" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_NMEA" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write NMEA data
 897     appendFileTar "$PATHOUT_BUFFER" "$FILEOUT_GPX" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_GPX" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write GPX file
 898     appendFileTar "$PATHOUT_BUFFER" "$FILEOUT_KML" "$PATHOUT_TAR" "$DIR_TMP" "$CMD_CONV_KML" "$CMD_COMPRESS" "$CMD_ENCRYPT"; # Write KML file
 899
 900     # Remove secured chunks from DIR_TMP
 901     rm "$PATHOUT_BUFFER" "$PATHOUT_NMEA" "$PATHOUT_GPX" "$PATHOUT_KML";
 902     vbm "DEBUG:STATUS:$FN:Finished magicWriteBuffer().";
 903 } # write buffer to disk
 904
 905 main() {
 906     processArguments "$@" # Process arguments.
 907
 908     # Determine working directory
 909     ## Set DIR_TMP_PARENT to user-specified value if specified
 910     if [[ "$OPTION_TMPDIR" = "true" ]]; then
 911             if [[ -d "$TMP_DIR_PRIORITY" ]]; then
 912             DIR_TMP_PARENT="$OPTION_TMPDIR";
 913         else
 914             yell "WARNING:Specified temporary working directory not valid:$OPTION_TMPDIR";
 915             exit 1;
 916         fi
 917     fi
 918
 919     ## Set DIR_TMP_PARENT to default or fallback otherwise
 920     if [[ -d "$DIR_TMP_DEFAULT" ]]; then
 921         DIR_TMP_PARENT="$DIR_TMP_DEFAULT";
 922     elif [[ -d /tmp ]]; then
 923         yell "WARNING:/dev/shm not available. Falling back to /tmp .";
 924         DIR_TMP_PARENT="/tmp";
 925     else
 926         yell "ERROR:No valid working directory available. Exiting.";
 927         exit 1;
 928     fi
 929
 930     ## Set DIR_TMP using DIR_TMP_PARENT and nonce (SCRIPT_TIME_START)
 931     DIR_TMP="$DIR_TMP_PARENT"/"$SCRIPT_TIME_START""..bkgpslog" && vbm "DEBUG:Set DIR_TMP to:$DIR_TMP"; # Note: removed at end of main().
 932
 933     # Set output encryption and compression option strings
 934     if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active.
 935         if checkapp age; then # Check that age is available.
 936             for pubkey in "${recPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
 937                 vbm "DEBUG:Testing pubkey string:$pubkey";
 938                 if echo "butts" | age -a -r "$pubkey" 1>/dev/null; then
 939                     #### Form age recipient string
 940                     recipients="$recipients""-r '$pubkey' ";
 941                     vbm "STATUS:Added pubkey for forming age recipient string:""$pubkey";
 942                     vbm "DEBUG:recipients:""$recipients";
 943                     #### Add validated pubkey to recPubKeysValid array
 944                     recPubKeysValid+=("$pubkey") && vbm "DEBUG:recPubkeysValid:pubkey added:$pubkey";
 945                 else
 946                     yell "ERROR:Exit code ""$?"". Invalid recipient pubkey string. Exiting."; exit 1;
 947                 fi
 948             done
 949             vbm "DEBUG:Finished processing recPubKeys array";
 950
 951             ##  Form age command string
 952             CMD_ENCRYPT="age ""$recipients " && vbm "CMD_ENCRYPT:$CMD_ENCRYPT";
 953             CMD_ENCRYPT_SUFFIX=".age" && vbm "CMD_ENCRYPT_SUFFIX:$CMD_ENCRYPT_SUFFIX";
 954         else
 955             yell "ERROR:Encryption enabled but \"age\" not found. Exiting."; exit 1;
 956         fi
 957     else
 958         CMD_ENCRYPT="tee /dev/null " && vbm "CMD_ENCRYPT:$CMD_ENCRYPT";
 959         CMD_ENCRYPT_SUFFIX="" && vbm "CMD_ENCRYPT_SUFFIX:$CMD_ENCRYPT_SUFFIX";
 960         vbm "DEBUG:Encryption not enabled."
 961     fi
 962     if [[ "$OPTION_COMPRESS" = "true" ]]; then # Check if compression option active
 963         if checkapp gzip; then # Check if gzip available
 964             CMD_COMPRESS="gzip " && vbm "CMD_COMPRESS:$CMD_COMPRESS";
 965             CMD_COMPRESS_SUFFIX=".gz" && vbm "CMD_COMPRESS_SUFFIX:$CMD_COMPRESS_SUFFIX";
 966         else
 967             yell "ERROR:Compression enabled but \"gzip\" not found. Exiting."; exit 1;
 968         fi
 969     else
 970         CMD_COMPRESS="tee /dev/null " && vbm "CMD_COMPRESS:$CMD_COMPRESS";
 971         CMD_COMPRESS_SUFFIX="" && vbm "CMD_COMPRESS_SUFFIX:$CMD_COMPRESS_SUFFIX";
 972         vbm "DEBUG:Compression not enabled.";
 973     fi
 974
 975     # Check that critical apps and dirs are available, displag missing ones.
 976     if ! checkapp gpspipe tar && ! checkdir "$DIR_OUT" "/dev/shm"; then
 977         yell "ERROR:Critical components missing.";
 978         displayMissing; yell "Exiting."; exit 1; fi
 979
 980     # Set script lifespan
 981     setScriptTTL "$SCRIPT_TTL"; # seconds until next new SCRIPT_TTL (ex: "day" or "hour")
 982
 983     # File name substring: encoded bufferTTL
 984     bufferTTL_STR="$(timeDuration $BUFFER_TTL)";
 985
 986     # Init temp working dir
 987     try mkdir "$DIR_TMP" && vbm "DEBUG:Working dir creatd at:$DIR_TMP";
 988
 989     # Initialize 'tar' archive
 990     ## Define output tar path (note: each day gets *one* tar file (Ex: "20200731..hostname_location.[.gpx.gz].tar"))
 991     PATHOUT_TAR="$DIR_OUT"/"$(dateShort)".."$SCRIPT_HOSTNAME""_location""$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX".tar && \
 992         vbm "STATUS:Set PATHOUT_TAR to:$PATHOUT_TAR";
 993     ## Check that PATHOUT_TAR is a tar. Rename old and create empty one otherwise.
 994     checkMakeTar "$PATHOUT_TAR" && vbm "DEBUG:Confirmed or Created to be a tar:$PATHOUT_TAR";
 995     ## Append VERSION file to PATHOUT_TAR
 996     magicWriteVersion;
 997
 998     # Define GPS conversion commands
 999     CMD_CONV_NMEA="tee /dev/null " && vbm "STATUS:Set CMD_CONV_NMEA to:$CMD_CONV_NMEA"; # tee as passthrough
1000     CMD_CONV_GPX="gpsbabel -i nmea -f - -o gpx -F - " && vbm "STATUS:Set CMD_CONV_GPX to:$CMD_CONV_GPX"; # convert NMEA to GPX
1001     CMD_CONV_KML="gpsbabel -i nmea -f - -o kml -F - " && vbm "STATUS:Set CMD_CONV_KML to:$CMD_CONV_KML"; # convert NMEA to KML
1002
1003     # MAIN LOOP:Record gps data until script lifespan ends
1004     while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
1005         magicGatherWriteBuffer &
1006         sleep "$BUFFER_TTL";
1007     done
1008
1009     # Cleanup
1010     ## Remove DIR_TMP
1011     try rm -r "$DIR_TMP";
1012
1013     vbm "STATUS:Main function finished.";
1014 } # Main function.
1015 #===END Declare local script functions===
1016 #==END Define script parameters==
1017
1018
1019 #==BEGIN Perform work and exit==
1020 main "$@" # Run main function.
1021 exit 0;
1022 #==END Perform work and exit==