exec/bklog

   1 #!/bin/bash
   2 # Desc: Compresses, encrypts, and writes stdin every 5 seconds
   3
   4 #==BEGIN Define script parameters==
   5 #===BEGIN Initialize variables===
   6
   7 # Logging Behavior parameters
   8 bufferTTL="300"; # Time-to-live (seconds) for each buffer round
   9 scriptTTL_TE="day"; # Time element at the end of which script terminates
  10 dirTmpDefault="/dev/shm"; # Default parent of working directory
  11
  12 # Script Metadata
  13 scriptName="bklog";             # Define basename of script file.
  14 scriptVersion="0.1.28-test3";          # Define version of script.
  15 scriptURL="https://gitlab.com/baltakatei/ninfacyzga-01"; # Define wesite hosting this script.
  16 scriptTimeStart="$(date +%Y%m%dT%H%M%S.%N)"; # YYYYmmddTHHMMSS.NNNNNNNNN
  17 scriptHostname=$(hostname);     # Save hostname of system running this script.
  18 PATH="$HOME/.local/bin:$PATH";  # Add "$(systemd-path user-binaries)" path in case user apps saved there
  19 ageVersion="1.0.0-beta2";       # Define version of age (encryption program)
  20 ageURL="https://github.com/FiloSottile/age/releases/tag/v1.0.0-beta2"; # Define website hosting age.
  21
  22 # Arrays
  23 declare -a buffer          # array for storing while read buffer
  24 declare -a argRecPubKeys   # array for processArguments function
  25 declare -a recPubKeysValid # array for storing both '-r' and '-R' recipient pubkeys
  26 declare -a argProcStrings argProcFileExts # for storing buffer processing strings (ex: "gpsbabel -i nmea -f - -o gpx -F - ")
  27 declare -Ag appRollCall    # Associative array for storing app status
  28 declare -Ag fileRollCall   # Associative array for storing file status
  29 declare -Ag dirRollCall    # Associative array for storing dir status
  30 declare -a procStrings procFileExts # Arrays for storing processing commands and resulting output file extensions
  31
  32 # Variables
  33 optionVerbose=""; optionEncrypt=""; dirOut=""; optionEncrypt=""; dir_tmp="";
  34 cmd_compress="";cmd_compress_suffix=""; cmd_encrypt=""; cmd_encrypt_suffix="";
  35
  36 #===END Initialize variables===
  37
  38 #===BEGIN Declare local script functions===
  39 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
  40 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
  41 try() { "$@" || die "cannot $*"; } #o
  42 processArguments() {
  43     while [ ! $# -eq 0 ]; do   # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
  44         case "$1" in
  45             -v | --verbose) optionVerbose="true"; vbm "DEBUG :Verbose mode enabled.";; # Enable verbose mode.
  46             -h | --help) showUsage; exit 1;; # Display usage.
  47             --version) showVersion; exit 1;; # Show version
  48             -o | --output) if [ -d "$2" ]; then dirOut="$2"; vbm "DEBUG :dirOut:$dirOut"; shift; fi ;; # Define output directory.
  49             -e | --encrypt) optionEncrypt="true"; vbm "DEBUG :Encrypted output mode enabled.";; # Enable encryption
  50             -r | --recipient) optionRecArg="true"; argRecPubKeys+=("$2"); vbm "STATUS:pubkey added:""$2"; shift;; # Add recipients
  51             -R | --recipient-dir) optionRecDir="true" && argRecDir="$2"; shift;; # Add recipient watch dir
  52             -c | --compress) optionCompress="true"; vbm "DEBUG :Compressed output mode enabled.";; # Enable compression
  53             -z | --time-zone) try setTimeZoneEV "$2"; shift;; # Set timestamp timezone
  54             -t | --temp-dir) optionTmpDir="true" && argTempDirPriority="$2"; shift;; # Set time zone
  55             -b | --buffer-ttl) optionCustomBufferTTL="true" && argCustomBufferTTL="$2"; shift;; # Set custom buffer period (default: 300 seconds)
  56             -B | --script-ttl) optionCustomScriptTTL_TE="true" && argCustomScriptTTL_TE="$2"; shift;; # Set custom script TTL (default: "day")
  57             -p | --process-string) optionProcString="true" && argProcStrings+=("$2") && argProcFileExts+=("$3") && vbm "STATUS:file extension \"$3\" for output of processing string added:\"$2\""; shift; shift;;
  58             -l | --label) optionLabel="true" && argLabel="$2"; vbm "DEBUG :Custom label received:$argLabel"; shift;;
  59             -w | --store-raw) optionStoreRaw="true" && argRawFileExt="$2"; vbm "DEBUG :Raw stdin file extension received:$argRawFileExt"; shift;;
  60             -W | --no-store-raw) optionNoStoreRaw="true"; vbm "DEBUG :Option selected to not store raw stdin data."; shift;;
  61             *) yell "ERROR: Unrecognized argument: $1"; yell "STATUS:All arguments:$*"; exit 1;; # Handle unrecognized options.
  62         esac
  63         shift
  64     done
  65 } # Argument Processing
  66 vbm() {
  67     # Description: Prints verbose message ("vbm") to stderr if optionVerbose is set to "true".
  68     # Usage: vbm "DEBUG :verbose message here"
  69     # Version 0.1.3
  70     # Input: arg1: string
  71     #        vars: optionVerbose
  72     # Output: stderr
  73     # Depends: bash 5.0.3, echo 8.30, date 8.30
  74
  75     if [ "$optionVerbose" = "true" ]; then
  76         functionTime=$(date --iso-8601=ns); # Save current time in nano seconds.
  77         echo "[$functionTime]:$0:""$*" 1>&2; # Display argument text.
  78     fi
  79
  80     # End function
  81     return 0; # Function finished.
  82 } # Displays message if optionVerbose true
  83 checkapp() {
  84     # Desc: If arg is a command, save result in assoc array 'appRollCall'
  85     # Usage: checkapp arg1 arg2 arg3 ...
  86     # Version: 0.1.1
  87     # Input: global assoc. array 'appRollCall'
  88     # Output: adds/updates key(value) to global assoc array 'appRollCall'
  89     # Depends: bash 5.0.3
  90     local returnState
  91
  92     #===Process Args===
  93     for arg in "$@"; do
  94         if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
  95             appRollCall[$arg]="true";
  96             if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
  97         else
  98             appRollCall[$arg]="false"; returnState="false";
  99         fi;
 100     done;
 101
 102     #===Determine function return code===
 103     if [ "$returnState" = "true" ]; then
 104         return 0;
 105     else
 106         return 1;
 107     fi;
 108 } # Check that app exists
 109 checkfile() {
 110     # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
 111     # Usage: checkfile arg1 arg2 arg3 ...
 112     # Version: 0.1.1
 113     # Input: global assoc. array 'fileRollCall'
 114     # Output: adds/updates key(value) to global assoc array 'fileRollCall';
 115     # Output: returns 0 if app found, 1 otherwise
 116     # Depends: bash 5.0.3
 117     local returnState
 118
 119     #===Process Args===
 120     for arg in "$@"; do
 121         if [ -f "$arg" ]; then
 122             fileRollCall["$arg"]="true";
 123             if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
 124         else
 125             fileRollCall["$arg"]="false"; returnState="false";
 126         fi;
 127     done;
 128
 129     #===Determine function return code===
 130     if [ "$returnState" = "true" ]; then
 131         return 0;
 132     else
 133         return 1;
 134     fi;
 135 } # Check that file exists
 136 checkdir() {
 137     # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
 138     # Usage: checkdir arg1 arg2 arg3 ...
 139     # Version 0.1.1
 140     # Input: global assoc. array 'dirRollCall'
 141     # Output: adds/updates key(value) to global assoc array 'dirRollCall';
 142     # Output: returns 0 if app found, 1 otherwise
 143     # Depends: Bash 5.0.3
 144     local returnState
 145
 146     #===Process Args===
 147     for arg in "$@"; do
 148         if [ -d "$arg" ]; then
 149             dirRollCall["$arg"]="true";
 150             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
 151         else
 152             dirRollCall["$arg"]="false"; returnState="false";
 153         fi
 154     done
 155
 156     #===Determine function return code===
 157     if [ "$returnState" = "true" ]; then
 158         return 0;
 159     else
 160         return 1;
 161     fi
 162 } # Check that dir exists
 163 displayMissing() {
 164     # Desc: Displays missing apps, files, and dirs
 165     # Usage: displayMissing
 166     # Version 0.1.1
 167     # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
 168     # Output: stderr: messages indicating missing apps, file, or dirs
 169     # Depends: bash 5, checkAppFileDir()
 170     local missingApps value appMissing missingFiles fileMissing
 171     local missingDirs dirMissing
 172
 173     #==BEGIN Display errors==
 174     #===BEGIN Display Missing Apps===
 175     missingApps="Missing apps  :";
 176     #for key in "${!appRollCall[@]}"; do echo "DEBUG :$key => ${appRollCall[$key]}"; done
 177     for key in "${!appRollCall[@]}"; do
 178         value="${appRollCall[$key]}";
 179         if [ "$value" = "false" ]; then
 180             #echo "DEBUG :Missing apps: $key => $value";
 181             missingApps="$missingApps""$key ";
 182             appMissing="true";
 183         fi;
 184     done;
 185     if [ "$appMissing" = "true" ]; then  # Only indicate if an app is missing.
 186         echo "$missingApps" 1>&2;
 187     fi;
 188     unset value;
 189     #===END Display Missing Apps===
 190
 191     #===BEGIN Display Missing Files===
 192     missingFiles="Missing files:";
 193     #for key in "${!fileRollCall[@]}"; do echo "DEBUG :$key => ${fileRollCall[$key]}"; done
 194     for key in "${!fileRollCall[@]}"; do
 195         value="${fileRollCall[$key]}";
 196         if [ "$value" = "false" ]; then
 197             #echo "DEBUG :Missing files: $key => $value";
 198             missingFiles="$missingFiles""$key ";
 199             fileMissing="true";
 200         fi;
 201     done;
 202     if [ "$fileMissing" = "true" ]; then  # Only indicate if an app is missing.
 203         echo "$missingFiles" 1>&2;
 204     fi;
 205     unset value;
 206     #===END Display Missing Files===
 207
 208     #===BEGIN Display Missing Directories===
 209     missingDirs="Missing dirs:";
 210     #for key in "${!dirRollCall[@]}"; do echo "DEBUG :$key => ${dirRollCall[$key]}"; done
 211     for key in "${!dirRollCall[@]}"; do
 212         value="${dirRollCall[$key]}";
 213         if [ "$value" = "false" ]; then
 214             #echo "DEBUG :Missing dirs: $key => $value";
 215             missingDirs="$missingDirs""$key ";
 216             dirMissing="true";
 217         fi;
 218     done;
 219     if [ "$dirMissing" = "true" ]; then  # Only indicate if an dir is missing.
 220         echo "$missingDirs" 1>&2;
 221     fi;
 222     unset value;
 223     #===END Display Missing Directories===
 224
 225     #==END Display errors==
 226 } # Display missing apps, files, dirs
 227
 228 appendArgTar(){
 229     # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
 230     # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
 231     # Version: 1.0.6
 232     # Input: arg1: data to be written
 233     #        arg2: file name of file to be inserted into tar
 234     #        arg3: tar archive path (must exist first)
 235     #        arg4: temporary working dir
 236     #        arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ")
 237     # Output: file written to disk
 238     # Example: decrypt multiple large files in parallel
 239     #          appendArgTar "$(cat /tmp/largefile1.gpg)" "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
 240     #          appendArgTar "$(cat /tmp/largefile2.gpg)" "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
 241     #          appendArgTar "$(cat /tmp/largefile3.gpg)" "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
 242     # Depends: bash 5, tar 1, yell()
 243     # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
 244
 245     local fn fileName tarPath tmpDir cmd0 cmd1 cmd2 cmd3 cmd4
 246
 247     # Save function name
 248     fn="${FUNCNAME[0]}";
 249     #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
 250
 251     # Set file name
 252     if ! [ -z "$2" ]; then fileName="$2"; else yell "ERROR:$fn:Not enough arguments."; exit 1; fi
 253
 254     # Check tar path is a file
 255     if [ -f "$3" ]; then tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file."; exit 1; fi
 256
 257     # Check temp dir arg
 258     if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi
 259
 260     # Set command strings
 261     if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string 1
 262     if ! [ -z "$6" ]; then cmd2="$6"; else cmd2="cat "; fi # command string 2
 263     if ! [ -z "$7" ]; then cmd3="$7"; else cmd3="cat "; fi # command string 3
 264     if ! [ -z "$8" ]; then cmd4="$8"; else cmd4="cat "; fi # command string 4
 265
 266     # Input command
 267     cmd0="echo \"\$1\""
 268
 269     # # Debug
 270     # yell "DEBUG:STATUS:$fn:cmd0:$cmd0"
 271     # yell "DEBUG:STATUS:$fn:cmd1:$cmd1"
 272     # yell "DEBUG:STATUS:$fn:cmd2:$cmd2"
 273     # yell "DEBUG:STATUS:$fn:cmd3:$cmd3"
 274     # yell "DEBUG:STATUS:$fn:cmd4:$cmd4"
 275     # yell "DEBUG:STATUS:$fn:fileName:$fileName"
 276     # yell "DEBUG:STATUS:$fn:tarPath:$tarPath"
 277     # yell "DEBUG:STATUS:$fn:tmpDir:$tmpDir"
 278
 279     # Write to temporary working dir
 280     eval "$cmd0 | $cmd1 | $cmd2 | $cmd3 | $cmd4" > "$tmpDir"/"$fileName";
 281
 282     # Append to tar
 283     try tar --append --directory="$tmpDir" --file="$tarPath" "$fileName";
 284     #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
 285 } # Append Bash var to file appended to Tar archive
 286 appendFileTar(){
 287     # Desc: Appends [processed] file to tar
 288     # Usage: appendFileTar [file path] [name of file to be inserted] [tar path] [temp dir] ([process cmd])
 289     # Version: 2.0.1
 290     # Input: arg1: path of file to be (processed and) written
 291     #        arg2: name to use for file inserted into tar
 292     #        arg3: tar archive path (must exist first)
 293     #        arg4: temporary working dir
 294     #        arg5: (optional) command string to process file (ex: "gpsbabel -i nmea -f - -o kml -F - ")
 295     # Output: file written to disk
 296     # Example: decrypt multiple large files in parallel
 297     #          appendFileTar /tmp/largefile1.gpg "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
 298     #          appendFileTar /tmp/largefile2.gpg "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
 299     #          appendFileTar /tmp/largefile3.gpg "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
 300     # Depends: bash 5.0.3, tar 1.30, cat 8.30, yell()
 301     local fn fileName tarPath tmpDir
 302
 303     # Save function name
 304     fn="${FUNCNAME[0]}";
 305     #yell "DEBUG :STATUS:$fn:Started appendFileTar()."
 306
 307     # Set file name
 308     if ! [ -z "$2" ]; then fileName="$2"; else yell "ERROR:$fn:Not enough arguments."; exit 1; fi
 309     # Check tar path is a file
 310     if [ -f "$3" ]; then tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file:$3"; exit 1; fi
 311     # Check temp dir arg
 312     if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi
 313     # Set command strings
 314     if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string
 315
 316     # Input command string
 317     cmd0="cat \"\$1\"";
 318
 319     # Write to temporary working dir
 320     eval "$cmd0 | $cmd1" > "$tmpDir"/"$fileName";
 321
 322     # Append to tar
 323     try tar --append --directory="$tmpDir" --file="$tarPath" "$fileName";
 324     #yell "DEBUG :STATUS:$fn:Finished appendFileTar()."
 325 } # Append [processed] file to Tar archive
 326 checkAgePubkey() {
 327     # Desc: Checks if string is an age-compatible pubkey
 328     # Usage: checkAgePubkey [str pubkey]
 329     # Version: 0.1.2
 330     # Input: arg1: string
 331     # Output: return code 0: string is age-compatible pubkey
 332     #         return code 1: string is NOT an age-compatible pubkey
 333     #         age stderr (ex: there is stderr if invalid string provided)
 334     # Depends: age (v0.1.0-beta2; https://github.com/FiloSottile/age/releases/tag/v1.0.0-beta2 )
 335
 336     argPubkey="$1";
 337
 338     if echo "test" | age -a -r "$argPubkey" 1>/dev/null; then
 339         return 0;
 340     else
 341         return 1;
 342     fi;
 343 } # Check age pubkey
 344 checkMakeTar() {
 345     # Desc: Checks that a valid tar archive exists, creates one otherwise
 346     # Usage: checkMakeTar [ path ]
 347     # Version: 1.0.2
 348     # Input: arg1: path of tar archive
 349     # Output: exit code 0 : tar readable
 350     #         exit code 1 : tar missing; created
 351     #         exit code 2 : tar not readable; moved; replaced
 352     # Depends: bash 5, date 8, tar 1, try()
 353     local pathTar returnFlag0 returnFlag1 returnFlag2
 354     pathTar="$1";
 355
 356     # Check if file is a valid tar archive
 357     if tar --list --file="$pathTar" 1>/dev/null 2>&1; then
 358         ## T1: return success
 359         returnFlag0="tar valid";
 360     elif { sleep 2; tar --list --file="$pathTar" 1>/dev/null 2>&1; }; then
 361         ## F1: Check tar archive again after 2-second sleep
 362         returnFlag0="tar valid";
 363     else
 364         ## F2-1: Check if file exists
 365         if [[ -f "$pathTar" ]]; then
 366             ### T: Rename file
 367             try mv "$pathTar" "$pathTar""--broken--""$(date +%Y%m%dT%H%M%S%z)" && \
 368                 returnFlag1="tar moved";
 369         else
 370             ### F: -
 371             :
 372         fi;
 373         ## F2-1: Create tar archive, return 0
 374         try tar --create --file="$pathTar" --files-from=/dev/null && \
 375             returnFlag2="tar created";
 376     fi;
 377
 378     # Determine function return code
 379     if [[ "$returnFlag0" = "tar valid" ]]; then
 380         return 0;
 381     elif [[ "$returnFlag2" = "tar created" ]] && ! [[ "$returnFlag1" = "tar moved" ]]; then
 382         return 1; # tar missing so created
 383     elif [[ "$returnFlag2" = "tar created" ]] && [[ "$returnFlag1" = "tar moved" ]]; then
 384         return 2; # tar not readable so moved; replaced
 385     fi;
 386 } # checks if arg1 is tar; creates one otherwise
 387 dateShort(){
 388     # Desc: Date without separators (YYYYmmdd)
 389     # Usage: dateShort ([str date])
 390     # Version: 1.1.2
 391     # Input: arg1: 'date'-parsable timestamp string (optional)
 392     # Output: stdout: date (ISO-8601, no separators)
 393     # Depends: bash 5.0.3, date 8.30, yell()
 394     local argTime timeCurrent timeInput dateCurrentShort
 395
 396     argTime="$1";
 397     # Get Current Time
 398     timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 399     # Decide to parse current or supplied date
 400     ## Check if time argument empty
 401     if [[ -z "$argTime" ]]; then
 402         ## T: Time argument empty, use current time
 403         timeInput="$timeCurrent";
 404     else
 405         ## F: Time argument exists, validate time
 406         if date --date="$argTime" 1>/dev/null 2>&1; then
 407             ### T: Time argument is valid; use it
 408             timeInput="$argTime";
 409         else
 410             ### F: Time argument not valid; exit
 411             yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
 412         fi;
 413     fi;
 414     # Construct and deliver separator-les date string
 415     dateCurrentShort="$(date -d "$timeInput" +%Y%m%d)"; # Produce separator-less current date with resolution 1 day.
 416     echo "$dateCurrentShort";
 417 } # Get YYYYmmdd
 418 dateTimeShort(){
 419     # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz)
 420     # Usage: dateTimeShort ([str date])
 421     # Version 1.1.1
 422     # Input: arg1: 'date'-parsable timestamp string (optional)
 423     # Output: stdout: timestamp (ISO-8601, no separators)
 424     # Depends: yell
 425     local argTime timeCurrent timeInput timeCurrentShort
 426
 427     argTime="$1";
 428     # Get Current Time
 429     timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 430     # Decide to parse current or supplied date
 431     ## Check if time argument empty
 432     if [[ -z "$argTime" ]]; then
 433         ## T: Time argument empty, use current time
 434         timeInput="$timeCurrent";
 435     else
 436         ## F: Time argument exists, validate time
 437         if date --date="$argTime" 1>/dev/null 2>&1; then
 438             ### T: Time argument is valid; use it
 439             timeInput="$argTime";
 440         else
 441             ### F: Time argument not valid; exit
 442             yell "ERROR:Invalid time argument supplied. Exiting."; exit 1;
 443         fi
 444     fi
 445     # Construct and deliver separator-les date string
 446     timeCurrentShort="$(date -d "$timeInput" +%Y%m%dT%H%M%S%z)";
 447     echo "$timeCurrentShort";
 448 } # Get YYYYmmddTHHMMSS±zzzz
 449 setTimeZoneEV(){
 450     # Desc: Set time zone environment variable TZ
 451     # Usage: setTimeZoneEV arg1
 452     # Version 0.1.2
 453     # Input: arg1: 'date'-compatible timezone string (ex: "America/New_York")
 454     #        TZDIR env var (optional; default: "/usr/share/zoneinfo")
 455     # Output: exports TZ
 456     #         exit code 0 on success
 457     #         exit code 1 on incorrect number of arguments
 458     #         exit code 2 if unable to validate arg1
 459     # Depends: yell(), printenv 8.30, bash 5.0.3
 460     # Tested on: Debian 10
 461     local tzDir returnState argTimeZone
 462
 463     argTimeZone="$1"
 464     if ! [[ $# -eq 1 ]]; then
 465         yell "ERROR:Invalid argument count.";
 466         return 1;
 467     fi
 468
 469     # Read TZDIR env var if available
 470     if printenv TZDIR 1>/dev/null 2>&1; then
 471         tzDir="$(printenv TZDIR)";
 472     else
 473         tzDir="/usr/share/zoneinfo";
 474     fi
 475
 476     # Validate TZ string
 477     if ! [[ -f "$tzDir"/"$argTimeZone" ]]; then
 478         yell "ERROR:Invalid time zone argument.";
 479         return 2;
 480     else
 481     # Export ARG1 as TZ environment variable
 482         TZ="$argTimeZone" && export TZ && returnState="true";
 483     fi
 484
 485     # Determine function return code
 486     if [ "$returnState" = "true" ]; then
 487         return 0;
 488     fi
 489 } # Exports TZ environment variable
 490 showVersion() {
 491     yell "$scriptVersion"
 492 } # Display script version.
 493 timeDuration(){
 494     # Desc: Given seconds, output ISO-8601 duration string
 495     # Ref/Attrib: ISO-8601:2004(E), §4.4.4.2 Representations of time intervals by duration and context information
 496     # Note: "1 month" ("P1M") is assumed to be "30 days" (see ISO-8601:2004(E), §2.2.1.2)
 497     # Usage: timeDuration [1:seconds] ([2:precision])
 498     # Version: 1.0.5
 499     # Input: arg1: seconds as base 10 integer >= 0  (ex: 3601)
 500     #        arg2: precision level (optional; default=2)
 501     # Output: stdout: ISO-8601 duration string (ex: "P1H1S", "P2Y10M15DT10H30M20S")
 502     #         exit code 0: success
 503     #         exit code 1: error_input
 504     #         exit code 2: error_unknown
 505     # Example: 'timeDuration 111111 3' yields 'P1DT6H51M'
 506     # Depends: date 8, bash 5, yell,
 507     local argSeconds argPrecision precision returnState remainder
 508     local fullYears fullMonths fullDays fullHours fullMinutes fullSeconds
 509     local hasYears hasMonths hasDays hasHours hasMinutes hasSeconds
 510     local witherPrecision output
 511     local displayYears displayMonths displayDays displayHours displayMinutes displaySeconds
 512
 513     argSeconds="$1"; # read arg1 (seconds)
 514     argPrecision="$2"; # read arg2 (precision)
 515     precision=2; # set default precision
 516
 517     # Check that between one and two arguments is supplied
 518     if ! { [[ $# -ge 1 ]] && [[ $# -le 2 ]]; }; then
 519         yell "ERROR:Invalid number of arguments:$# . Exiting.";
 520         returnState="error_input"; fi
 521
 522     # Check that argSeconds provided
 523     if [[ $# -ge 1 ]]; then
 524         ## Check that argSeconds is a positive integer
 525         if [[ "$argSeconds" =~ ^[[:digit:]]+$ ]]; then
 526             :
 527         else
 528             yell "ERROR:argSeconds not a digit.";
 529             returnState="error_input";
 530         fi
 531     else
 532         yell "ERROR:No argument provided. Exiting.";
 533         exit 1;
 534     fi
 535
 536     # Consider whether argPrecision was provided
 537     if  [[ $# -eq 2 ]]; then
 538         # Check that argPrecision is a positive integer
 539         if [[ "$argPrecision" =~ ^[[:digit:]]+$ ]] && [[ "$argPrecision" -gt 0 ]]; then
 540         precision="$argPrecision";
 541         else
 542             yell "ERROR:argPrecision not a positive integer. (is $argPrecision ). Leaving early.";
 543             returnState="error_input";
 544         fi;
 545     else
 546         :
 547     fi;
 548
 549     remainder="$argSeconds" ; # seconds
 550     ## Calculate full years Y, update remainder
 551     fullYears=$(( remainder / (365*24*60*60) ));
 552     remainder=$(( remainder - (fullYears*365*24*60*60) ));
 553     ## Calculate full months M, update remainder
 554     fullMonths=$(( remainder / (30*24*60*60) ));
 555     remainder=$(( remainder - (fullMonths*30*24*60*60) ));
 556     ## Calculate full days D, update remainder
 557     fullDays=$(( remainder / (24*60*60) ));
 558     remainder=$(( remainder - (fullDays*24*60*60) ));
 559     ## Calculate full hours H, update remainder
 560     fullHours=$(( remainder / (60*60) ));
 561     remainder=$(( remainder - (fullHours*60*60) ));
 562     ## Calculate full minutes M, update remainder
 563     fullMinutes=$(( remainder / (60) ));
 564     remainder=$(( remainder - (fullMinutes*60) ));
 565     ## Calculate full seconds S, update remainder
 566     fullSeconds=$(( remainder / (1) ));
 567     remainder=$(( remainder - (remainder*1) ));
 568     ## Check which fields filled
 569     if [[ $fullYears -gt 0 ]]; then hasYears="true"; else hasYears="false"; fi
 570     if [[ $fullMonths -gt 0 ]]; then hasMonths="true"; else hasMonths="false"; fi
 571     if [[ $fullDays -gt 0 ]]; then hasDays="true"; else hasDays="false"; fi
 572     if [[ $fullHours -gt 0 ]]; then hasHours="true"; else hasHours="false"; fi
 573     if [[ $fullMinutes -gt 0 ]]; then hasMinutes="true"; else hasMinutes="false"; fi
 574     if [[ $fullSeconds -ge 0 ]]; then hasSeconds="true"; else hasSeconds="false"; fi
 575
 576     ## Determine which fields to display (see ISO-8601:2004 §4.4.3.2)
 577     witherPrecision="false"
 578
 579     ### Years
 580     if $hasYears && [[ $precision -gt 0 ]]; then
 581         displayYears="true";
 582         witherPrecision="true";
 583     else
 584         displayYears="false";
 585     fi;
 586     if $witherPrecision; then ((precision--)); fi;
 587
 588     ### Months
 589     if $hasMonths && [[ $precision -gt 0 ]]; then
 590         displayMonths="true";
 591         witherPrecision="true";
 592     else
 593         displayMonths="false";
 594     fi;
 595     if $witherPrecision && [[ $precision -gt 0 ]]; then
 596         displayMonths="true";
 597     fi;
 598     if $witherPrecision; then ((precision--)); fi;
 599
 600     ### Days
 601     if $hasDays && [[ $precision -gt 0 ]]; then
 602         displayDays="true";
 603         witherPrecision="true";
 604     else
 605         displayDays="false";
 606     fi;
 607     if $witherPrecision && [[ $precision -gt 0 ]]; then
 608         displayDays="true";
 609     fi;
 610     if $witherPrecision; then ((precision--)); fi;
 611
 612     ### Hours
 613     if $hasHours && [[ $precision -gt 0 ]]; then
 614         displayHours="true";
 615         witherPrecision="true";
 616     else
 617         displayHours="false";
 618     fi;
 619     if $witherPrecision && [[ $precision -gt 0 ]]; then
 620         displayHours="true";
 621     fi;
 622     if $witherPrecision; then ((precision--)); fi;
 623
 624     ### Minutes
 625     if $hasMinutes && [[ $precision -gt 0 ]]; then
 626         displayMinutes="true";
 627         witherPrecision="true";
 628     else
 629         displayMinutes="false";
 630     fi;
 631     if $witherPrecision && [[ $precision -gt 0 ]]; then
 632         displayMinutes="true";
 633     fi;
 634     if $witherPrecision; then ((precision--)); fi;
 635
 636     ### Seconds
 637
 638     if $hasSeconds && [[ $precision -gt 0 ]]; then
 639         displaySeconds="true";
 640         witherPrecision="true";
 641     else
 642         displaySeconds="false";
 643     fi;
 644     if $witherPrecision && [[ $precision -gt 0 ]]; then
 645         displaySeconds="true";
 646     fi;
 647     if $witherPrecision; then ((precision--)); fi;
 648
 649     ## Determine whether or not the "T" separator is needed to separate date and time elements
 650     if ( $displayHours || $displayMinutes || $displaySeconds); then
 651         displayDateTime="true"; else displayDateTime="false"; fi
 652
 653     ## Construct duration output string
 654     output="P"
 655     if $displayYears; then
 656         output=$output$fullYears"Y"; fi
 657     if $displayMonths; then
 658         output=$output$fullMonths"M"; fi
 659     if $displayDays; then
 660         output=$output$fullDays"D"; fi
 661     if $displayDateTime; then
 662         output=$output"T"; fi
 663     if $displayHours; then
 664         output=$output$fullHours"H"; fi
 665     if $displayMinutes; then
 666         output=$output$fullMinutes"M"; fi
 667     if $displaySeconds; then
 668         output=$output$fullSeconds"S"; fi
 669
 670     ## Output duration string to stdout
 671     echo "$output" && returnState="true";
 672
 673     #===Determine function return code===
 674     if [ "$returnState" = "true" ]; then
 675         return 0;
 676     elif [ "$returnState" = "error_input" ]; then
 677         yell "ERROR:input";
 678         return 1;
 679     else
 680         yell "ERROR:Unknown";
 681         return 2;
 682     fi
 683
 684 } # Get duration (ex: PT10M4S )
 685 timeUntilNextDay(){
 686     # Desc: Report seconds until next day.
 687     # Version: 1.0.2
 688     # Output: stdout: integer seconds until next day
 689     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 690     # Usage: timeUntilNextDay
 691     # Usage: if ! myTTL="$(timeUntilNextDay)"; then yell "ERROR in if statement"; exit 1; fi
 692     # Depends: date 8, echo 8, yell, try
 693
 694     local returnState timeCurrent timeNextDay secondsUntilNextDay returnState
 695     timeCurrent="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 696     timeNextDay="$(date -d "$timeCurrent next day" --iso-8601=date)"; # Produce timestamp of beginning of tomorrow with resolution of 1 second.
 697     secondsUntilNextDay="$(( $(date +%s -d "$timeNextDay") - $(date +%s -d "$timeCurrent") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
 698     if [[ "$secondsUntilNextDay" -gt 0 ]]; then
 699         returnState="true";
 700     elif [[ "$secondsUntilNextDay" -eq 0 ]]; then
 701         returnState="warning_zero";
 702         yell "WARNING:Reported time until next day exactly zero.";
 703     elif [[ "$secondsUntilNextDay" -lt 0 ]]; then
 704         returnState="warning_negative";
 705         yell "WARNING:Reported time until next day is negative.";
 706     fi
 707
 708     try echo "$secondsUntilNextDay"; # Report
 709
 710     # Determine function return code
 711     if [[ "$returnState" = "true" ]]; then
 712         return 0;
 713     elif [[ "$returnState" = "warning_zero" ]]; then
 714         return 1;
 715     elif [[ "$returnState" = "warning_negative" ]]; then
 716         return 2;
 717     fi
 718 } # Report seconds until next day
 719 timeUntilNextHour(){
 720     # Desc: Report seconds until next hour
 721     # Version 1.0.1
 722     # Output: stdout: integer seconds until next hour
 723     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 724     # Usage: timeUntilNextHour
 725     # Usage: if ! myTTL="$(timeUntilNextHour)"; then yell "ERROR in if statement"; exit 1; fi
 726
 727     local returnState timeCurrent timeNextHour secondsUntilNextHour
 728     timeCurrent="$(date --iso-8601=seconds)"; # Produce `date`-parsable current timestamp with resolution of 1 second.
 729     timeNextHour="$(date -d "$timeCurrent next hour" --iso-8601=hours)"; # Produce `date`-parsable current time stamp with resolution of 1 second.
 730     secondsUntilNextHour="$(( $(date +%s -d "$timeNextHour") - $(date +%s -d "$timeCurrent") ))"; # Calculate seconds until next hour (res. 1 second).
 731     if [[ "$secondsUntilNextHour" -gt 0 ]]; then
 732         returnState="true";
 733     elif [[ "$secondsUntilNextHour" -eq 0 ]]; then
 734         returnState="warning_zero";
 735         yell "WARNING:Reported time until next hour exactly zero.";
 736     elif [[ "$secondsUntilNextHour" -lt 0 ]]; then
 737         returnState="warning_negative";
 738         yell "WARNING:Reported time until next hour is negative.";
 739     fi;
 740
 741     try echo "$secondsUntilNextHour"; # Report
 742
 743     # Determine function return code
 744     if [[ "$returnState" = "true" ]]; then
 745         return 0;
 746     elif [[ "$returnState" = "warning_zero" ]]; then
 747         return 1;
 748     elif [[ "$returnState" = "warning_negative" ]]; then
 749         return 2;
 750     fi;
 751 } # Report seconds until next hour
 752 validateInput() {
 753     # Desc: Validates Input
 754     # Usage: validateInput [str input] [str input type]
 755     # Version: 0.3.1
 756     # Input: arg1: string to validate
 757     #        arg2: string specifying input type (ex:"ssh_pubkey")
 758     # Output: return code 0: if input string matched specified string type
 759     # Depends: bash 5, yell()
 760
 761     local fn argInput argType
 762
 763     # Save function name
 764     fn="${FUNCNAME[0]}";
 765
 766     # Process arguments
 767     argInput="$1";
 768     argType="$2";
 769     if [[ $# -gt 2 ]]; then yell "ERROR:$0:$fn:Too many arguments."; exit 1; fi;
 770
 771     # Check for blank
 772     if [[ -z "$argInput" ]]; then return 1; fi
 773
 774     # Define input types
 775     ## ssh_pubkey
 776     ### Check for alnum/dash base64 (ex: "ssh-rsa AAAAB3NzaC1yc2EAAA")
 777     if [[ "$argType" = "ssh_pubkey" ]]; then
 778         if [[ "$argInput" =~ ^[[:alnum:]-]*[\ ]*[[:alnum:]+/=]*$ ]]; then
 779             return 0; fi; fi;
 780
 781     ## age_pubkey
 782     ### Check for age1[:bech32:]
 783     if [[ "$argType" = "age_pubkey" ]]; then
 784         if [[ "$argInput" =~ ^age1[qpzry9x8gf2tvdw0s3jn54khce6mua7l]*$ ]]; then
 785             return 0; fi; fi
 786
 787     ## integer
 788     if [[ "$argType" = "integer" ]]; then
 789         if [[ "$argInput" =~ ^[[:digit:]]*$ ]]; then
 790             return 0; fi; fi;
 791
 792     ## time element (year, month, week, day, hour, minute, second)
 793     if [[ "$argType" = "time_element" ]]; then
 794         if [[ "$argInput" = "year" ]] || \
 795                [[ "$argInput" = "month" ]] || \
 796                [[ "$argInput" = "week" ]] || \
 797                [[ "$argInput" = "day" ]] || \
 798                [[ "$argInput" = "hour" ]] || \
 799                [[ "$argInput" = "minute" ]] || \
 800                [[ "$argInput" = "second" ]]; then
 801             return 0; fi; fi;
 802
 803     # Return error if no condition matched.
 804     return 1;
 805 } # Validates strings
 806
 807 magicInitWorkingDir() {
 808     # Desc: Determine temporary working directory from defaults or user input
 809     # Usage: magicInitWorkingDir
 810     # Input:  vars: optionTmpDir, argTempDirPriority, dirTmpDefault
 811     # Input:  vars: scriptTimeStart
 812     # Output: vars: dir_tmp
 813     # Depends: bash 5.0.3, processArguments(), vbm(), yell()
 814     # Parse '-t' option (user-specified temporary working dir)
 815     ## Set dir_tmp_parent to user-specified value if specified
 816     local fn dir_tmp_parent
 817
 818     # Save function name
 819     fn="${FUNCNAME[0]}";
 820
 821     vbm "STATUS:$fn:Starting magicInitWorkingDir() function.";
 822     if [[ "$optionTmpDir" = "true" ]]; then
 823         if [[ -d "$argTempDirPriority" ]]; then
 824             dir_tmp_parent="$argTempDirPriority";
 825         else
 826             yell "WARNING:$fn:Specified temporary working directory not valid:$argTempDirPriority";
 827             exit 1; # Exit since user requires a specific temp dir and it is not available.
 828         fi;
 829     else
 830     ## Set dir_tmp_parent to default or fallback otherwise
 831         if [[ -d "$dirTmpDefault" ]]; then
 832             dir_tmp_parent="$dirTmpDefault";
 833         elif [[ -d /tmp ]]; then
 834             yell "WARNING:$fn:$dirTmpDefault not available. Falling back to /tmp .";
 835             dir_tmp_parent="/tmp";
 836         else
 837             yell "ERROR:$fn:No valid working directory available. Exiting.";
 838             exit 1;
 839         fi;
 840     fi;
 841     ## Set dir_tmp using dir_tmp_parent and nonce (scriptTimeStart)
 842     dir_tmp="$dir_tmp_parent"/"$scriptTimeStart""..bkgpslog" && vbm "DEBUG :$fn:Set dir_tmp to:$dir_tmp"; # Note: removed at end of main().
 843     vbm "STATUS:$fn:Finished magicInitWorkingDir() function.";
 844 } # Sets working dir
 845 magicInitCheckTar() {
 846     # Desc: Initializes or checks output tar
 847     # input: vars: dirOut, bufferTTL, cmd_encrypt_suffix, cmd_compress_suffix
 848     # input: vars: scriptHostname
 849     # output: vars: pathout_tar
 850     # depends: Bash 5.0.3, vbm(), dateShort(), checkMakeTar(), magicWriteVersion()
 851     local fn checkMakeTarES
 852
 853     # Save function name
 854     fn="${FUNCNAME[0]}";
 855
 856     vbm "STATUS:$fn:Starting magicInitCheckTar() function.";
 857     # Form pathout_tar
 858     pathout_tar="$dirOut"/"$(dateShort "$(date --date="$bufferTTL seconds ago" --iso-8601=seconds)")".."$scriptHostname""$label""$cmd_compress_suffix""$cmd_encrypt_suffix".tar && \
 859         vbm "STATUS:$fn:Set pathout_tar to:$pathout_tar";
 860     # Validate pathout_tar as tar.
 861     checkMakeTar "$pathout_tar"; checkMakeTarES="$?";
 862     ## Add VERSION file if checkMakeTar had to create a tar (exited 1) or replace one (exited 2)
 863     vbm "STATUS:$fn:exit status before magicWriteVersion:$checkMakeTarES"
 864     if [[ "$checkMakeTarES" -eq 1 ]] || [[ "$checkMakeTarES" -eq 2 ]]; then magicWriteVersion; fi
 865     vbm "STATUS:$fn:Finished magicInitCheckTar() function.";
 866 } # Initialize tar, set pathout_tar
 867 magicParseCompressionArg() {
 868     # Desc: Parses compression arguments specified by '-c' option
 869     # Input:  vars: optionCompress
 870     # Output: cmd_compress, cmd_compress_suffix
 871     # Depends: processArguments(), vbm(), checkapp(), gzip 1.9
 872     local fn
 873
 874     # Save function name
 875     fn="${FUNCNAME[0]}";
 876
 877     vbm "STATUS:$fn:Starting magicParseCompressionArg() function.";
 878     if [[ "$optionCompress" = "true" ]]; then # Check if compression option active
 879         if checkapp gzip; then # Check if gzip available
 880             cmd_compress="gzip " && vbm "STATUS:$fn:cmd_compress:$cmd_compress";
 881             cmd_compress_suffix=".gz" && vbm "STATUS:$fn:cmd_compress_suffix:$cmd_compress_suffix";
 882         else
 883             yell "ERROR:$fn:Compression enabled but \"gzip\" not found. Exiting."; exit 1;
 884         fi;
 885     else
 886         cmd_compress="tee /dev/null " && vbm "STATUS:$fn:cmd_compress:$cmd_compress";
 887         cmd_compress_suffix="" && vbm "STATUS:$fn:cmd_compress_suffix:$cmd_compress_suffix";
 888         vbm "DEBUG :$fn:Compression not enabled.";
 889     fi;
 890     vbm "STATUS:$fn:Finished magicParseCompressionArg() function.";
 891 } # Form compression cmd string and filename suffix
 892 magicParseCustomTTL() {
 893     # Desc: Set user-specified TTLs for buffer and script
 894     # Usage: magicParseCustomTTL
 895     # Input: vars: argCustomBufferTTL (integer), argCustomScriptTTL_TE (string)
 896     # Input: vars: optionCustomBufferTTL, optionCustomScriptTTL_TE
 897     # Input: vars: bufferTTL (integer), scriptTTL_TE (string)
 898     # Output: bufferTTL (integer), scriptTTL_TE (string)
 899     # Depends: Bash 5.0.3, yell(), vbm(), validateInput(), showUsage()
 900     local fn
 901
 902     # Save function name
 903     fn="${FUNCNAME[0]}";
 904
 905     vbm "STATUS:$fn:Starting magicParseCustomTTL() function.";
 906     # React to '-b, --buffer-ttl' option
 907     if [[ "$optionCustomBufferTTL" = "true" ]]; then
 908         ## T: Check if argCustomBufferTTL is an integer
 909         if validateInput "$argCustomBufferTTL" "integer"; then
 910             ### T: argCustomBufferTTL is an integer
 911             bufferTTL="$argCustomBufferTTL" && vbm "STATUS:$fn:Custom bufferTTL from -b:$bufferTTL";
 912         else
 913             ### F: argcustomBufferTTL is not an integer
 914             yell "ERROR:$fn:Invalid integer argument for custom buffer time-to-live."; showUsage; exit 1;
 915         fi;
 916         ## F: do not change bufferTTL
 917     fi;
 918
 919     # React to '-B, --script-ttl' option
 920     if [[ "$optionCustomScriptTTL_TE" = "true" ]]; then
 921         ## T: Check if argCustomScriptTTL is a time element (ex: "day", "hour")
 922         if validateInput "$argCustomScriptTTL_TE" "time_element"; then
 923             ### T: argCustomScriptTTL is a time element
 924             scriptTTL_TE="$argCustomScriptTTL_TE" && vbm "STATUS:$fn:Custom scriptTTL_TE from -B:$scriptTTL_TE";
 925         else
 926             ### F: argcustomScriptTTL is not a time element
 927             yell "ERROR:$fn:Invalid time element argument for custom script time-to-live."; showUsage; exit 1;
 928         fi;
 929         ## F: do not change scriptTTL_TE
 930     fi;
 931     vbm "STATUS:$fn:Finished magicParseCustomTTL() function.";
 932 } # Sets custom script or buffer TTL if specified
 933 magicParseLabel() {
 934     # Desc: Parses -l option to set label
 935     # In : optionLabel, argLabel
 936     # Out: vars: label
 937     # Depends: Bash 5.0.3, vbm(), yell()
 938     local fn
 939
 940     # Save function name
 941     fn="${FUNCNAME[0]}";
 942
 943     vbm "STATUS:$fn:Started magicParseLabel() function.";
 944     # Do nothing if optionLabel not set to true.
 945     if [[ ! "$optionLabel" = "true" ]]; then
 946         vbm "STATUS:$fn:optionlabel not set to 'true'. Returning early.";
 947         return;
 948     fi;
 949     # Set label if optionLabel is true
 950     if [[ "$optionLabel" = "true" ]]; then
 951         label="_""$argLabel";
 952         vbm "STATUS:$fn:Set label:$label";
 953     fi;
 954     vbm "STATUS:$fn:Finished magicParseLabel() function.";
 955 } # Set label used in output file name
 956 magicParseProcessStrings() {
 957     # Desc: Processes user-supplied process strings into process commands for appendFileTar().
 958     # Usage: magicParseProcessStrings
 959     # In : vars: optionProcString optionNoStoreRaw optionStoreRaw argRawFileExt
 960     #      arry: argProcStrings, argProcFileExts
 961     # Out: arry: procStrings, procFileExts
 962     # Depends Bash 5.0.3, yell(), vbm()
 963     local fn rawFileExt
 964
 965     # Save function name
 966     fn="${FUNCNAME[0]}";
 967
 968     vbm "STATUS:$fn:Starting magicParseProcessStrings() function.";
 969     vbm "STATUS:$fn:var:optionProcString:$optionProcString";
 970     vbm "STATUS:$fn:var:optionNoStoreRaw:$optionNoStoreRaw";
 971     vbm "STATUS:$fn:var:optionStoreRaw:$optionStoreRaw";
 972     vbm "STATUS:$fn:var:argRawFileExt:$argRawFileExt";
 973     vbm "STATUS:$fn:ary:argProcStrings:${argProcStrings[*]}";
 974     vbm "STATUS:$fn:ary:argProcFileExts:${argProcFileExts[*]}"
 975     # Validate input
 976     ## Validate argRawFileExt
 977     if [[ "$argRawFileExt" =~ ^[.][[:alnum:]]*$ ]]; then
 978         rawFileExt="$argRawFileExt" && \
 979             vbm "DEBUG :$fn:Set rawFileExt to \"$argRawFileExt\"";
 980     else
 981         vbm "DEBUG :$fn:Validation failure for $argRawFileExt . Not set to rawFileExt.";
 982     fi;
 983
 984     # Add default stdin output file entries for procStrings, procFileExts
 985     ## Check if user specified that no raw stdin be saved.
 986     if [[ ! "$optionNoStoreRaw" = "true" ]]; then
 987         ### T: --no-store-raw not set. Store raw. Append procStrings with cat.
 988         vbm "DEBUG :$fn:--no-store-raw not set. Storing raw.";
 989         #### Append procStrings array
 990         procStrings+=("cat ") && \
 991             vbm "DEBUG :$fn:Appended \"cat \" to procStrings";
 992         vbm "DEBUG :$fn:procStrings array:${procStrings[*]}";
 993         #### Check if --store-raw set.
 994         if [[ "$optionStoreRaw" = "true" ]]; then
 995             ##### T: --store-raw set. Append procFileExts with user-specified file ext
 996             vbm "DEBUG :$fn:--store-raw set.";
 997             procFileExts+=("$rawFileExt") && \
 998                 vbm "DEBUG :$fn:Appended $rawFileExt to procFileExts";
 999             vbm "STATUS:$fn:procFileExts array:${procFileExts[*]}";
1000         else
1001             ##### F: --store-raw not set. Append procFileExts with default ".stdin" file ext
1002             ###### Append procFileExts array
1003             procFileExts+=(".stdin") && \
1004                 vbm "DEBUG :$fn:Appended \".stdin\" to procFileExts";
1005             vbm "STATUS:$fn:procFileExts array:${procFileExts[*]}";
1006         fi;
1007     else
1008         ### F: --no-store-raw set. Do not store raw.
1009         #### Do not append procStrings or procFileExts arrays.
1010         vbm "STATUS:$fn:--no-store-raw set. Not storing raw.";
1011         vbm "STATUS:$fn:procFileExts array:${procFileExts[*]}";
1012     fi;
1013
1014     # Do nothing more if optionProcString not set to true.
1015     if [[ ! "$optionProcString" = "true" ]]; then
1016         vbm "STATUS:$fn:optionProcString not set to 'true'. Returning early.";
1017         return; fi;
1018     # Validate input array indices
1019     ## Make sure that argProcStrings and argProcFileExts have same index counts
1020     if ! [[ "${#argProcStrings[@]}" -eq "${#argProcFileExts[@]}" ]]; then
1021         yell "ERROR:$fn:Mismatch in number of elements in arrays argProcStrings and argProcFileExts:${#argProcStrings[@]} DNE ${#argProcFileExts[@]}";
1022         yell "STATUS:$fn:argProcStrings:${argProcStrings[*]}"; yell "STATUS:$fn:argProcFileExts:${argProcFileExts[*]}"; exit 1; fi;
1023     ## Make sure that no array elements are blank
1024     for element in "${argProcStrings[@]}"; do
1025         if [[ -z "$element" ]]; then yell "ERROR:$fn:Empty process string specified. Exiting."; exit 1; fi; done
1026     for element in "${argProcFileExts[@]}"; do
1027         if [[ -z "$element" ]]; then yell "ERROR:$fn:Empty output file extension specified. Exiting."; exit 1; fi; done
1028     ## Make sure that no process string starts with '-' (ex: if only one arg supplied after '-p' option)
1029     for element in "${argProcStrings[@]}"; do
1030         if [[ "$element" =~ ^[-][[:print:]]*$ ]] && [[ ! "$element" =~ ^[[:print:]]*$ ]]; then
1031             yell "ERROR:$fn:Illegal character '-' at start of process string element:\"$element\"";
1032             exit 1; fi; done;
1033     vbm "STATUS:$fn:Quick check shows argProcStrings and argProcFileExts appear to have valid contents.";
1034     vbm "STATUS:$fn:argProcStrings:${argProcStrings[*]}"
1035     vbm "STATUS:$fn:argProcFileExts:${argProcFileExts[*]}"
1036     procStrings+=("${argProcStrings[@]}"); # Export process command strings
1037     procFileExts+=("${argProcFileExts[@]}"); # Export process command strings
1038     vbm "STATUS:$fn:procStrings:${procStrings[*]}"
1039     vbm "STATUS:$fn:procFileExts:${procFileExts[*]}"
1040     vbm "STATUS:$fn:Finished magicParseProcessStrings() function.";
1041 } # Validate and save process strings and file extensions to arrays procStrings, procFileExts
1042 magicParseRecipients() {
1043     # Desc: Parses recipient arguments specified by '-r' or '-R' options
1044     # Usage: magicParseRecipients
1045     # In : vars: optionEncrypt, optionRecArg, optionRecDir
1046     #      arry: argRecPubKeys (-r), argRecDir (-R)
1047     # Out: vars: cmd_encrypt, cmd_encrypt_suffix
1048     # Depends: head 8.30, checkapp(), checkAgePubkey(), validateInput()
1049     local fn recipients recipientDir recFileLine updateRecipients
1050     local -a recPubKeysValid candRecPubKeysValid
1051
1052     # Save function name
1053     fn="${FUNCNAME[0]}";
1054     vbm "STATUS:$fn:Starting magicParseRecipients() function.";
1055
1056     # Catch illegal option combinations
1057     ## Catch case if '-e' is set but neither '-r' nor '-R' is set
1058     if [[ "$optionEncrypt" = "true" ]] && \
1059            ! { [[ "$optionRecArg" = "true" ]] || [[ "$optionRecDir" = "true" ]]; }; then
1060         yell "ERROR:$fn:\\'-e\\' set but no \\'-r\\' or \\'-R\\' set."; exit 1; fi;
1061     ## Catch case if '-r' or '-R' set but '-e' is not
1062     if [[ ! "$optionEncrypt" = "true" ]] && \
1063            { [[ "$optionRecArg" = "true" ]] || [[ "$optionRecDir" = "true" ]]; }; then
1064         yell "ERROR:$fn:\\'-r\\' or \\'-R\\' set but \\'-e\\' is not set."; exit 1; fi;
1065
1066     # Handle no encryption cases
1067     if [[ ! "$optionEncrypt" = "true" ]]; then
1068         cmd_encrypt="cat " && vbm "STATUS:$fn:cmd_encrypt:$cmd_encrypt";
1069         cmd_encrypt_suffix="" && vbm "STATUS:$fn:cmd_encrypt_suffix:$cmd_encrypt_suffix";
1070         vbm "DEBUG :$fn:Encryption not enabled.";
1071         return; fi;
1072
1073     # Handle encryption cases
1074     ## Check age availability
1075     if ! checkapp age; then yell "ERROR:$fn:age not available. Exiting."; exit 1; fi
1076     ## Parse '-r' options: validate and append pubkeys from argRecPubKeys to recPubKeysValid
1077     if [[ "$optionRecArg" = "true" ]]; then
1078         for pubkey in "${argRecPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
1079             vbm "DEBUG :$fn:Testing pubkey string:$pubkey";
1080             if checkAgePubkey "$pubkey" && \
1081                     ( validateInput "$pubkey" "ssh_pubkey" || validateInput "$pubkey" "age_pubkey"); then
1082                 #### Add validated pubkey to recPubKeysValid array
1083                 recPubKeysValid+=("$pubkey") && \
1084                     vbm "DEBUG :$fn:recPubkeysValid:pubkey added:$pubkey";
1085             else
1086                 yell "ERROR:$fn:Exit code ""$?"". Invalid recipient pubkey string. Exiting."; exit 1;
1087             fi;
1088         done;
1089         vbm "STATUS:$fn:Finished processing argRecPubKeys array";
1090         vbm "DEBUG :$fn:Array of validated pubkeys:${recPubKeysValid[*]}";
1091     fi;
1092     ## Parse '-R' options: validate and append pubkeys in argRecDir to recPubKeysValid
1093     if [[ "$optionRecDir" = "true" ]]; then
1094         ### Check that argRecDir is a directory
1095         if [[ -d "$argRecDir" ]]; then
1096             recipientDir="$argRecDir" && \
1097                 vbm "STATUS:$fn:Recipient watch directory detected:\"$recipientDir\"";
1098             #### Initialize variable indicating outcome of pubkey review
1099             unset updateRecipients
1100             #### Add existing recipients from '-r' option
1101             candRecPubKeysValid=("${recPubKeysValid[@]}");
1102             #### Parse files in recipientDir
1103             for file in "$recipientDir"/*; do
1104                 ##### Read first line of each file
1105                 recFileLine="$(head -n1 "$file")" && \
1106                     vbm "STATUS:$fn:Checking if pubkey:\"$recFileLine\"";
1107                 ##### check if first line is a valid pubkey
1108                 if checkAgePubkey "$recFileLine" && \
1109                         ( validateInput "$recFileLine" "ssh_pubkey" || validateInput "$recFileLine" "age_pubkey"); then
1110                     ###### T: add candidate pubkey to candRecPubKeysValid
1111                     candRecPubKeysValid+=("$recFileLine") && \
1112                         vbm "STATUS:$fn:RecDir pubkey is valid pubkey:\"$recFileLine\"";
1113                 else
1114                     ###### F: throw warning;
1115                     yell "ERROR:$fn:Invalid recipient file detected. Not modifying recipient list:$recFileLine";
1116                     updateRecipients="false";
1117                 fi;
1118             done
1119             #### Write candRecPubKeysValid array to recPubKeysValid if no invalid key detected
1120             if ! [[ "$updateRecipients" = "false" ]]; then
1121                 recPubKeysValid=("${candRecPubKeysValid[@]}") && \
1122                     vbm "STATUS:$fn:Wrote candRecPubkeysValid to recPubKeysValid:\"${recPubKeysValid[*]}\"";
1123             fi;
1124         fi;
1125     fi;
1126
1127     ## Form age recipient string from recPubKeysValid
1128     for pubkey in "${recPubKeysValid[@]}"; do
1129         recipients="$recipients""-r '$pubkey' ";
1130         vbm "STATUS:$fn:Added pubkey for forming age recipient string:""$pubkey";
1131         vbm "DEBUG :$fn:recipients:""$recipients";
1132     done;
1133
1134     ## Output cmd_encrypt, cmd_encrypt_suffix from recipients
1135     cmd_encrypt="age ""$recipients " && vbm "STATUS:$fn:cmd_encrypt:$cmd_encrypt";
1136     cmd_encrypt_suffix=".age" && vbm "STATUS:$fn:cmd_encrypt_suffix:$cmd_encrypt_suffix";
1137
1138     vbm "STATUS:$fn:Finished magicParseRecipients() function.";
1139 } # Sets cmd_encrypt, cmd_encrypt_suffix from -r, -R args
1140 magicSetScriptTTL() {
1141     #Desc: Sets script_TTL seconds from provided time_element string argument
1142     #Usage: magicSetScriptTTL [str time_element]
1143     #Input: arg1: string (Ex: scriptTTL_TE; "day" or "hour")
1144     #Output: var: scriptTTL (integer seconds)
1145     #Depends: timeUntilNextHour, timeUntilNextDay
1146     local fn argTimeElement
1147
1148     # Save function name
1149     fn="${FUNCNAME[0]}";
1150
1151     vbm "STATUS:$fn:Starting magicSetScriptTTL() function.";
1152     argTimeElement="$1";
1153     if [[ "$argTimeElement" = "day" ]]; then
1154         # Set script lifespan to end at start of next day
1155         vbm "STATUS:$fn:Setting script lifespan to end at start of next day. argTimeElement:$argTimeElement";
1156         if ! scriptTTL="$(timeUntilNextDay)"; then # sets scriptTTL, then checks exit code
1157             if [[ "$scriptTTL" -eq 0 ]]; then
1158                 ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
1159                 vbm "STATUS:$fn:scriptTTL:$scriptTTL";
1160             else
1161             yell "ERROR:$fn:timeUntilNextDay exit code $?"; exit 1;
1162             fi;
1163         fi;
1164     elif [[ "$argTimeElement" = "hour" ]]; then
1165         # Set script lifespan to end at start of next hour
1166         vbm "STATUS:$fn:Setting script lifespan to end at start of next hour. argTimeElement:$argTimeElement";
1167         if ! scriptTTL="$(timeUntilNextHour)"; then # sets scriptTTL, then checks exit code
1168             if [[ "$scriptTTL" -eq 0 ]]; then
1169                 ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
1170                 vbm "STATUS:$fn:scriptTTL:$scriptTTL";
1171             else
1172                 yell "ERROR:$fn:timeUntilNextHour exit code $?"; exit 1;
1173             fi;
1174         fi;
1175     else
1176         yell "ERROR:$fn:Invalid argument for setScriptTTL function:$argTimeElement"; exit 1;
1177     fi;
1178     vbm "STATUS:$fn:Finished magicSetScriptTTL() function.";
1179 } # Set scriptTTL in seconds until next (day|hour).
1180 magicWriteVersion() {
1181     # Desc: Appends time-stamped VERSION to pathout_tar
1182     # Usage: magicWriteVersion
1183     # Input: vars: pathout_tar, dir_tmp
1184     # Input: vars: scriptVersion, scriptURL, ageVersion, ageURL, scriptHostname
1185     # Input: array: recPubKeysValid
1186     # Output: appends tar (pathout_tar)
1187     # Depends: bash 5.0.3, dateTimeShort(), appendArgTar()
1188     local fn fileoutVersion contentVersion pubKeyIndex pubKeyIndex
1189
1190     # Save function name
1191     fn="${FUNCNAME[0]}";
1192
1193     vbm "STATUS:$fn:Starting magicWriteVersion() function.";
1194     # Set VERSION file name
1195     fileoutVersion="$(dateTimeShort)..VERSION";
1196
1197     # Gather VERSION data in contentVersion
1198     contentVersion="scriptVersion=$scriptVersion";
1199     #contentVersion="$contentVersion""\\n";
1200     contentVersion="$contentVersion""\\n""scriptName=$scriptName";
1201     contentVersion="$contentVersion""\\n""scriptURL=$scriptURL";
1202     contentVersion="$contentVersion""\\n""ageVersion=$ageVersion";
1203     contentVersion="$contentVersion""\\n""ageURL=$ageURL";
1204     contentVersion="$contentVersion""\\n""date=$(date --iso-8601=seconds)";
1205     contentVersion="$contentVersion""\\n""hostname=$scriptHostname";
1206     ## Add list of recipient pubkeys
1207     for pubkey in "${recPubKeysValid[@]}"; do
1208         ((pubKeyIndex++))
1209         contentVersion="$contentVersion""\\n""PUBKEY_$pubKeyIndex=$pubkey";
1210     done
1211     ## Process newline escapes
1212     contentVersion="$(echo -e "$contentVersion")"
1213
1214     # Write contentVersion as file fileoutVersion and write-append to pathout_tar
1215     appendArgTar "$contentVersion" "$fileoutVersion" "$pathout_tar" "$dir_tmp" && \
1216         vbm "STATUS:$fn:Appended $fileoutVersion to $pathout_tar";
1217     vbm "STATUS:$fn:Finished magicWriteVersion() function.";
1218 } # write version data to pathout_tar via appendArgTar()
1219 magicProcessWriteBuffer() {
1220     # Desc: process and write buffer
1221     # In : vars: bufferTTL scriptHostname label dir_tmp SECONDS
1222     #    : vars: timeBufferStartEpoch timeBufferEndEpoch
1223     #    : arry: buffer
1224     # Out: file:(pathout_tar)
1225     # Depends: Bash 5.0.3, date 8.30, yell(), vbm(), dateTimeShort(),
1226     ### Note: These arrays should all have the same number of elements:
1227     ###       pathouts, fileouts, procFileExts, procStrings
1228
1229     local fn timeBufferStartLong timeBufferStart bufferDuration bufferDurationStr fileoutBasename
1230     local -a fileouts pathouts
1231     local writeCmd1 writeCmd2 writeCmd3 writeCmd4
1232
1233     # Debug:Get function name
1234     fn="${FUNCNAME[0]}";
1235
1236     vbm "STATUS:$fn:Started magicProcessWriteBuffer().";
1237     vbm "DEBUG :$fn:buffer array element count:${#buffer[@]}";
1238     vbm "DEBUG :$fn:buffer array first element:${buffer[0]}";
1239     vbm "DEBUG :$fn:buffer array last element :${buffer[-1]}";
1240
1241     # Determine file paths (time is start of buffer period)
1242     ## Calculate start time
1243     timeBufferStartLong="$(date --date="@$timeBufferStartEpoch" --iso-8601=seconds)" && \
1244         vbm "DEBUG :$fn:timeBufferStartLong:$timeBufferStartLong"; # Note start time in 'date' parsable ISO-8601
1245     timeBufferStart="$(dateTimeShort "$timeBufferStartLong" )" && \
1246         vbm "DEBUG :$fn:timeBufferStart:$timeBufferStart"; # Note start time YYYYmmddTHHMMSS+zzzz (no separators)
1247     ## Calculate buffer duration string (ISO-8601 duration)
1248     bufferDuration="$((timeBufferEndEpoch - timeBufferStartEpoch))" && \
1249         vbm "DEBUG :$fn:bufferDuration:$bufferDuration"; # length of time (seconds) stdin was read
1250     bufferDurationStr="$(timeDuration "$bufferDuration")" && \
1251         vbm "DEBUG :$fn:bufferDurationStr:$bufferDurationStr"; # buffer duration (ISO-8601)
1252     ## Set common basename
1253     fileoutBasename="$timeBufferStart""--""$bufferDurationStr""..""$scriptHostname""$label" && \
1254         vbm "STATUS:$fn:Set fileoutBasename to:$fileoutBasename";
1255     ## Determine output file name array
1256     ### in: fileOutBasename cmd_compress_suffix cmd_encrypt_suffix procFileExts
1257     for fileExt in "${procFileExts[@]}"; do
1258         fileouts+=("$fileoutBasename""$fileExt""$cmd_compress_suffix""$cmd_encrypt_suffix") && \
1259             vbm "STATUS:$fn:Added $fileExt to fileouts:${fileouts[*]}";
1260     done;
1261     for fileName in "${fileouts[@]}"; do
1262         pathouts+=("$dir_tmp"/"$fileName") && \
1263             vbm "STATUS:$fn:Added $fileName to pathouts:${pathouts[*]}";
1264     done;
1265     ## Update pathout_tar
1266     magicInitCheckTar;
1267
1268     # Process and write buffers to dir_tmp
1269     ## Prepare command strings
1270     writeCmd1="printf \"%s\\\\n\" \"\${buffer[@]}\""; # printf "%s\\n" "${buffer[@]}"
1271     #writeCmd2="" # NOTE: Specified by parsing array procStrings
1272     writeCmd3="$cmd_compress";
1273     writeCmd4="$cmd_encrypt";
1274
1275     ## Process buffer and write to dir_tmp
1276     vbm "DEBUG :$fn:fileouts    element count:${#fileouts[@]}";
1277     vbm "DEBUG :$fn:pathouts    element count:${#pathouts[@]}";
1278     vbm "DEBUG :$fn:procStrings element count:${#pathouts[@]}";
1279     vbm "DEBUG :$fn:fileouts    contents:${fileouts[*]}";
1280     vbm "DEBUG :$fn:pathouts    contents:${pathouts[*]}";
1281     vbm "DEBUG :$fn:procStrings contents:${pathouts[*]}";
1282     for index in "${!pathouts[@]}"; do
1283         writeCmd2="${procStrings[$index]}";
1284         writeCmdAll="$writeCmd1 | $writeCmd2 | $writeCmd3 | $writeCmd4" && vbm "STATUS:$fn:Assembled command:\"$writeCmdAll\"";
1285         eval "$writeCmd1 | $writeCmd2 | $writeCmd3 | $writeCmd4" > "${pathouts[$index]}" && vbm "STATUS:$fn:Wrote command output to ${pathouts[$index]}";
1286     done;
1287
1288     # Append dir_tmp files to pathout_tar
1289     wait; # Wait to avoid collision with older magicProcessWriteBuffer() instances (see https://www.tldp.org/LDP/abs/html/x9644.html )
1290     for index in "${!pathouts[@]}"; do
1291         tar --append --directory="$dir_tmp" --file="$pathout_tar" "${fileouts[$index]}" && \
1292             vbm "STATUS:$fn:Appended ${pathouts[$index]} to $pathout_tar";
1293         #appendFileTar "${pathouts[$index]}" "${fileouts[$index]}" "$pathout_tar" "$dir_tmp" && \
1294     done;
1295
1296     # Remove secured chunks from dir_tmp
1297     for path in "${pathouts[@]}"; do
1298         rm "$path" && vbm "STATUS:$fn:Removed:$path";
1299     done;
1300
1301     vbm "STATUS:$fn:Finished magicProcessWriteBuffer().";
1302 } # Process and Write buffer
1303 showUsage() {
1304     cat <<'EOF'
1305     USAGE:
1306         cmd | bklog [ options ]
1307
1308     OPTIONS:
1309         -h, --help
1310                 Display help information.
1311         --version
1312                 Display script version.
1313         -v, --verbose
1314                 Display debugging info.
1315         -e, --encrypt
1316                 Encrypt output.
1317         -r, --recipient [ string pubkey ]
1318                 Specify recipient. May be age or ssh pubkey.
1319                 May be specified multiple times for multiple pubkeys.
1320                 See https://github.com/FiloSottile/age
1321         -o, --output [ path dir ]
1322                 Specify output directory to save logs. This option is required
1323                 to save log data.
1324         -p, --process-string [ filter command ] [ output file extension]
1325                 Specify how to create and name a processed version of the stdin.
1326                 For example, if stdin is 'nmea' location data:
1327
1328                 -p "gpsbabel -i nmea -f - -o gpx -F - " ".gpx"
1329
1330                 This option would cause the stdin to 'bklog' to be piped into
1331                 the 'gpsbabel' command, interpreted as 'nmea' data, converted
1332                 into 'gpx' format, and then appended to the output tar file
1333                 as a file with a '.gpx' extension.
1334                 This option may be specified multiple times in order to output
1335                 results of multiple different processing methods.
1336         -l, --label [ string ]
1337                 Specify a label to be included in all output file names.
1338                 Ex: 'location' if stdin is location data.
1339         -w, --store-raw [ file extension ]
1340                 Specify file extension of file within output tar that contains
1341                 raw stdin data. The default behavior is to always save raw stdin
1342                 data in a '.stdin' file. Example usage when 'bklog' receives
1343                 'nmea' data from 'gpspipe -r':
1344
1345                 -w ".nmea"
1346
1347                 Stdin data is saved in a '.nmea' file within the output tar.
1348         -W, --no-store-raw
1349                 Do not store raw stdin in output tar.
1350         -c, --compress
1351                 Compress output with gzip (before encryption if enabled).
1352         -z, --time-zone
1353                 Specify time zone. (ex: "America/New_York")
1354         -t, --temp-dir [path dir]
1355                 Specify parent directory for temporary working directory.
1356                 Default: "/dev/shm"
1357         -R, --recipient-dir [path dir]
1358                 Specify directory containing files whose first lines are
1359                 to be interpreted as pubkey strings (see '-r' option). Only
1360                 one directory may be specified.
1361         -b, --buffer-ttl [integer]
1362                 Specify custom buffer period in seconds (default: 300 seconds)
1363         -B, --script-ttl [time element string]
1364                 Specify custom script time-to-live in seconds (default: "day")
1365                 Valid values: "day", "hour"
1366
1367     EXAMPLE: (bash script lines)
1368     $ gpspipe -r | /bin/bash bklog -v -e -c -z "UTC" -t "/dev/shm" \
1369     -r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \
1370     -r age1ala848kqrvxc88rzaauc6vc5v0fqrvef9dxyk79m0vjea3hagclswu0lgq \
1371     -R ~/.config/bklog/recipients -w ".nmea" -b 300 -B "day" \
1372     -o ~/Sync/Logs -l "location" \
1373     -p "gpsbabel -i nmea -f - -o gpx -F - " ".gpx" \
1374     -p "gpsbabel -i nmea -f - -o kml -F - " ".kml"
1375 EOF
1376 } # Display information on how to use this script.
1377
1378 main() {
1379     # Desc: Main function
1380     # Usage: main "$@"
1381     # Inputs: many
1382     # Outputs: file (pathout_tar)
1383     # Depends: many
1384     local fn
1385
1386     # Debug:Get function name
1387     fn="${FUNCNAME[0]}";
1388
1389     vbm "STATUS:$fn:Started function main().";
1390     # Process arguments
1391     processArguments "$@";
1392     ## Determine working directory
1393     magicInitWorkingDir; # Sets dir_tmp from argTempDirPriority
1394     ## Set output encryption and compression option strings
1395     ### React to "-e", "-r", and "-R" (encryption recipients) options
1396     magicParseRecipients; # Update cmd_encrypt, cmd_encrypt_suffix
1397     ### React to "-c" ("compression") option
1398     magicParseCompressionArg; # Updates cmd_compress[_suffix]
1399     ## React to "-b" and "-B" (custom buffer and script TTL) options
1400     magicParseCustomTTL; # Sets custom scriptTTL_TE and/or bufferTTL if specified
1401     ## React to "-p" (user-supplied process command and file extension strings) options
1402     magicParseProcessStrings; # Sets arrays: procStrings, procFileExts
1403     ## React to "-l" (output file label) option
1404     magicParseLabel; # sets label (ex: "_location")
1405
1406     # Perform secondary setup operations
1407     ## Set script lifespan (scriptTTL from scriptTTL_TE)
1408     magicSetScriptTTL "$scriptTTL_TE";
1409     ## Adjust SECONDS so buffer rounds align with time elements
1410     ### Advance SECONDS the remainder seconds for dividend timeUntilNextDay, divisor bufferTTL
1411     if [[ "$(timeUntilNextDay)" -gt "$bufferTTL" ]]; then
1412         vbm "DEBUG :$fn:SECONDS currently  :$SECONDS";
1413         SECONDS="$(( bufferTTL - ($(timeUntilNextDay) % bufferTTL) ))" && \
1414             vbm "DEBUG :$fn:SECONDS advanced to:$SECONDS";
1415         vbm "DEBUG :$fn:current time:$(date --iso-8601=seconds)";
1416     fi;
1417     ## Init temp working dir
1418     try mkdir "$dir_tmp" && vbm "DEBUG :$fn:Working dir created at dir_tmp:$dir_tmp";
1419     ## Initialize output tar (set pathout_tar)
1420     magicInitCheckTar;
1421     ## Append VERSION file to tar
1422     magicWriteVersion;
1423
1424     # Check vital apps, files, dirs
1425     if ! checkapp tar && ! checkdir "$dirOut" "dir_tmp"; then
1426         yell "ERROR:$fn:Critical components missing.";
1427         displayMissing; yell "Exiting."; exit 1; fi
1428
1429     # MAIN LOOP: Run until script TTL seconds pass
1430     bufferRound=0;
1431     while [[ $SECONDS -lt "scriptTTL" ]]; do
1432         vbm "STATUS:$fn:Starting buffer round:$bufferRound";
1433         bufferTOD="$(( (1+bufferRound)*bufferTTL ))" && vbm "DEBUG :$fn:bufferTOD:$bufferTOD"; # Set buffer round time-of-death
1434         # Consume stdin to fill buffer until buffer time-of-death (TOD) arrives
1435         while read -r -t "$bufferTTL" line && [[ $SECONDS -lt "$bufferTOD" ]]; do
1436             # Append line to buffer array
1437             buffer+=("$line");
1438         done;
1439         # Mark time for buffer
1440         timeBufferStartEpoch="$timeBufferEndEpoch" && vbm "DEBUG :$fn:timeBufferStartEpoch:$timeBufferStartEpoch";
1441         timeBufferEndEpoch="$(date +%s)" && vbm "DEBUG :$fn:timeBufferEndEpoch:$timeBufferEndEpoch";
1442         # Create dir_tmp if missing
1443         if ! [[ -d "$dir_tmp" ]]; then
1444             yell "ERROR:$fn:dir_tmp existence failure:$dir_tmp";
1445             try mkdir "$dir_tmp" && vbm "DEBUG :$fn:Working dir recreated dir_tmp:$dir_tmp"; fi
1446         # Update cmd_encrypt, cmd_encrypt_suffix
1447         magicParseRecipients;
1448         # Export buffer to asynchronous processing.
1449         magicProcessWriteBuffer &
1450         unset buffer; # Clear buffer array for next bufferRound
1451         # Increment buffer round
1452         ((bufferRound++));
1453     done;
1454
1455     # Cleanup
1456     ## Remove dir_tmp
1457     try rm -r "$dir_tmp" && vbm "STATUS:$fn:Removed dir_tmp:$dir_tmp";
1458
1459     vbm "STATUS:$fn:Finished function main().";
1460 } # Main function
1461
1462 #===END Declare local script functions===
1463 #==END Define script parameters==
1464
1465 #==BEGIN Perform work and exit==
1466 main "$@" # Run main function.
1467 exit 0;
1468 #==END Perform work and exit==
1469
1470 # Author: Steven Baltakatei Sandoval;
1471 # License: GPLv3+