exec/bkgpslog

   1 #!/bin/bash
   2
   3 # Desc: Records gps data until midnight
   4 # Author: Steven Baltakatei Sandoval; License: GPLv3+
   5 # Usage: bkgpslog --output [output dir]
   6
   7 #==BEGIN Define script parameters==
   8 PATH="$HOME/.local/bin:$PATH"   # Add "$(systemd-path user-binaries)" path in case apps saved there
   9 SCRIPT_HOSTNAME=$(hostname)     # Save hostname of system running this script.
  10 SCRIPT_VERSION="bkgpslog 0.0.1" # Define version of script.
  11 SCRIPT_TIME_SHORT="$(date +%Y%m%dT%H%M%S%z)" # Save current date & time in ISO-8601 format.
  12 SCRIPT_DATE_SHORT="$(date +%Y%m%d)"          # Save current date in ISO-8601 format.
  13
  14 declare -Ag appRollCall # Associative array for storing app status
  15 declare -Ag fileRollCall # Associative array for storing file status
  16 declare -Ag dirRollCall # Associative array for storing dir status
  17 declare -a recPubKeys # for processArguments function
  18 declare recipients # for main function
  19
  20 #===BEGIN Declare local script functions===
  21 checkapp() {
  22     # Desc: If arg is a command, save result in assoc array 'appRollCall'
  23     # Usage: checkapp arg1 arg2 arg3 ...
  24     # Input: global assoc. array 'appRollCall'
  25     # Output: adds/updates key(value) to global assoc array 'appRollCall'
  26     local returnState
  27     #echo "DEBUG:$(date +%S.%N)..Starting checkapp function."
  28     #echo "DEBUG:args: $@"
  29     #echo "DEBUG:returnState:$returnState"
  30
  31     #===Process Args===
  32     for arg in "$@"; do
  33         #echo "DEBUG:processing arg:$arg"
  34         if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
  35             appRollCall[$arg]="true";
  36             #echo "DEBUG:appRollCall[$arg]:"${appRollCall[$arg]}
  37             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  38         else
  39             appRollCall[$arg]="false"; returnState="false";
  40         fi
  41     done
  42
  43     #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
  44     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
  45
  46     #===Determine function return code===
  47     if [ "$returnState" = "true" ]; then
  48         #echo "DEBUG:checkapp returns true for $arg";
  49         return 0;
  50     else
  51         #echo "DEBUG:checkapp returns false for $arg";
  52         return 1;
  53     fi
  54 } # Check that app exists
  55 checkfile() {
  56     # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
  57     # Usage: checkfile arg1 arg2 arg3 ...
  58     # Input: global assoc. array 'fileRollCall'
  59     # Output: adds/updates key(value) to global assoc array 'fileRollCall';
  60     # Output: returns 0 if app found, 1 otherwise
  61     local returnState
  62
  63     #===Process Args===
  64     for arg in "$@"; do
  65         #echo "DEBUG:processing arg:$arg"
  66         if [ -f "$arg" ]; then
  67             fileRollCall["$arg"]="true";
  68             #echo "DEBUG:fileRollCall[\"$arg\"]:"${fileRollCall["$arg"]}
  69             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  70         else
  71             fileRollCall["$arg"]="false"; returnState="false";
  72         fi
  73     done
  74
  75     #for key in "${!fileRollCall[@]}"; do echo "DEBUG:fileRollCall key [$key] is:${fileRollCall[$key]}"; done
  76     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
  77
  78     #===Determine function return code===
  79     if [ "$returnState" = "true" ]; then
  80         #echo "DEBUG:checkapp returns true for $arg";
  81         return 0;
  82     else
  83         #echo "DEBUG:checkapp returns false for $arg";
  84         return 1;
  85     fi
  86 } # Check that file exists
  87 checkdir() {
  88     # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
  89     # Usage: checkdir arg1 arg2 arg3 ...
  90     # Input: global assoc. array 'dirRollCall'
  91     # Output: adds/updates key(value) to global assoc array 'dirRollCall';
  92     # Output: returns 0 if app found, 1 otherwise
  93     local returnState
  94
  95     #===Process Args===
  96     for arg in "$@"; do
  97         #echo "DEBUG:processing arg:$arg"
  98         if [ -d "$arg" ]; then
  99             dirRollCall["$arg"]="true";
 100             #echo "DEBUG:dirRollCall[\"$arg\"]:"${dirRollCall["$arg"]}
 101             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
 102         elif [ "$arg" = "" ]; then
 103             dirRollCall["$arg"]="false"; returnState="false";
 104         else
 105             returnState="false";
 106         fi
 107     done
 108
 109     #for key in "${!dirRollCall[@]}"; do echo "DEBUG:dirRollCall key [$key] is:${dirRollCall[$key]}"; done
 110     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
 111
 112     #===Determine function return code===
 113     if [ "$returnState" = "true" ]; then
 114         #echo "DEBUG:checkapp returns true for $arg";
 115         return 0;
 116     else
 117         #echo "DEBUG:checkapp returns false for $arg";
 118         return 1;
 119     fi
 120 } # Check that dir exists
 121
 122 # Yell, Die, Try Three-Fingered Claw technique
 123 # Ref/Attrib: https://stackoverflow.com/a/25515370
 124 yell() { echo "$0: $*" >&2; }
 125 die() { yell "$*"; exit 111; }
 126 try() { "$@" || die "cannot $*"; }
 127
 128 echoerr() {
 129     echo "$@" 1>&2; # Define stderr echo function.
 130 } # Define stderr message function.
 131 showUsage() {
 132     echoerr "USAGE:"
 133     echoerr "    bkgpslog [ options ]"
 134     echoerr
 135     echoerr "OPTIONS:"
 136     echoerr "    -h, --help"
 137     echoerr "            Display help information."
 138     echoerr
 139     echoerr "    --version"
 140     echoerr "            Display script version."
 141     echoerr
 142     echoerr "    -v, --verbose"
 143     echoerr "            Display debugging info."
 144     echoerr
 145     echoerr "    -e, --encrypt"
 146     echoerr "            Encrypt output."
 147     echoerr
 148     echoerr "    -r, --recipient [ pubkey string ]"
 149     echoerr "            Specify recipient."
 150     echoerr
 151     echoerr "    -o, --output [ directory ]"
 152     echoerr "            Specify output directory to save logs."
 153     echoerr
 154     echoerr "    -c, --compress"
 155     echoerr "            Compress output with gzip (before encryption if enabled)."
 156     echoerr
 157     echoerr "EXAMPLE: (bash script lines)"
 158     echoerr "/bin/bash bkgpslog -e -c \\"
 159     echoerr "-r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \\"
 160     echoerr "-r age1ala848kqrvxc88rzaauc6vc5v0fqrvef9dxyk79m0vjea3hagclswu0lgq \\"
 161     echoerr "-o ~/Sync/Location"
 162 } # Display information on how to use this script.
 163 showVersion() {
 164     echoerr "$SCRIPT_VERSION"
 165 } # Display script version.
 166 vbm() {
 167     # Usage: vbm "DEBUG:verbose message here"
 168     # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true".
 169     # Input:
 170     #   - OPTION_VERBOSE  variable set by processArguments function. (ex: "true", "false")
 171     #   - "$@"            positional arguments fed to this function.
 172     # Output: stderr
 173     # Script function dependencies: echoerr
 174     # External function dependencies: echo
 175     # Last modified: 2020-04-11T23:57Z
 176     # Last modified by: Steven Baltakatei Sandoval
 177     # License: GPLv3+
 178     # Ref./Attrib:
 179
 180     if [ "$OPTION_VERBOSE" = "true" ]; then
 181         FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds.
 182         echoerr "[$FUNCTION_TIME] ""$*"; # Display argument text.
 183     fi
 184
 185     # End function
 186     return 0; # Function finished.
 187 } # Verbose message display function.
 188 processArguments() {
 189     while [ ! $# -eq 0 ]; do   # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
 190         #echoerr "DEBUG:Starting processArguments while loop."
 191         #echoerr "DEBUG:Provided arguments are:""$*"
 192         case "$1" in
 193             -h | --help) showUsage; exit 1;; # Display usage.
 194             --version) showVersion; exit 1;; # Show version
 195             -v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode.
 196             -o | --output) if [ -d "$2" ]; then DIROUT="$2"; vbm "DEBUG:DIROUT:$DIROUT"; shift; fi ;; # Define output directory.
 197             -e | --encrypt) OPTION_ENCRYPT="true"; vbm "DEBUG:Encrypted output mode enabled.";;
 198             -r | --recipient) # Add 'age' recipient via public key string
 199                 recPubKeys+=("$2"); vbm "pubkey added:""$2"; shift;;
 200             -c | --compress) OPTION_COMPRESS="true"; vbm "DEBUG:Compressed output mode enabled.";;
 201             *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options.
 202         esac
 203         shift
 204     done
 205 } # Argument Processing
 206 timeUntilNextDay(){
 207     # Desc: Report seconds until next day.
 208     # Output: stdout: integer seconds until next day
 209     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 210     # Usage: timeUntilNextDay
 211     # Usage: if ! myTTL="$(timeUntilNextDay)"; then yell "ERROR in if statement"; exit 1; fi
 212     local returnState TIME_CURRENT TIME_NEXT_DAY SECONDS_UNTIL_NEXT_DAY
 213     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 214     TIME_NEXT_DAY="$(date -d "$TIME_CURRENT next day" --iso-8601=date)"; # Produce timestamp of beginning of tomorrow with resolution of 1 second.
 215     SECONDS_UNTIL_NEXT_DAY="$(( $(date +%s -d "$TIME_NEXT_DAY") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
 216     if [[ "$SECONDS_UNTIL_NEXT_DAY" -gt 0 ]]; then
 217         returnState="true";
 218     elif [[ "$SECONDS_UNTIL_NEXT_DAY" -eq 0 ]]; then
 219         returnState="WARNING_ZERO";
 220         yell "WARNING:Reported time until next day exactly zero.";
 221     elif [[ "$SECONDS_UNTIL_NEXT_DAY" -lt 0 ]]; then
 222         returnState="WARNING_NEGATIVE";
 223         yell "WARNING:Reported time until next day is negative.";
 224     fi
 225
 226     try echo "$SECONDS_UNTIL_NEXT_DAY"; # Report
 227
 228     #===Determine function return code===
 229     if [[ "$returnState" = "true" ]]; then
 230         return 0;
 231     elif [[ "$returnState" = "WARNING_ZERO" ]]; then
 232         return 1;
 233     elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then
 234         return 2;
 235     fi
 236 } # Report seconds until next day
 237 timeUntilNextHour(){
 238     # Desc: Report seconds until next hour
 239     # Output: stdout: integer seconds until next hour
 240     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 241     # Usage: timeUntilNextHour
 242     # Usage: if ! myTTL="$(timeUntilNextHour)"; then yell "ERROR in if statement"; exit 1; fi
 243     local returnState TIME_CURRENT TIME_NEXT_HOUR SECONDS_UNTIL_NEXT_HOUR
 244     TIME_CURRENT="$(date --iso-8601=seconds)"; # Produce `date`-parsable current timestamp with resolution of 1 second.
 245     TIME_NEXT_HOUR="$(date -d "$TIME_CURRENT next hour" --iso-8601=hours)"; # Produce `date`-parsable current time stamp with resolution of 1 second.
 246     SECONDS_UNTIL_NEXT_HOUR="$(( $(date +%s -d "$TIME_NEXT_HOUR") - $(date +%s -d "$TIME_CURRENT") ))"; # Calculate seconds until next hour (res. 1 second).
 247     if [[ "$SECONDS_UNTIL_NEXT_HOUR" -gt 0 ]]; then
 248         returnState="true";
 249     elif [[ "$SECONDS_UNTIL_NEXT_HOUR" -eq 0 ]]; then
 250         returnState="WARNING_ZERO";
 251         yell "WARNING:Reported time until next hour exactly zero.";
 252     elif [[ "$SECONDS_UNTIL_NEXT_HOUR" -lt 0 ]]; then
 253         returnState="WARNING_NEGATIVE";
 254         yell "WARNING:Reported time until next hour is negative.";
 255     fi
 256
 257     try echo "$SECONDS_UNTIL_NEXT_HOUR"; # Report
 258
 259     #===Determine function return code===
 260     if [[ "$returnState" = "true" ]]; then
 261         return 0;
 262     elif [[ "$returnState" = "WARNING_ZERO" ]]; then
 263         return 1;
 264     elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then
 265         return 2;
 266     fi
 267 } # Report seconds until next hour
 268 dateTimeShort(){
 269     # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz)
 270     # Usage: dateTimeShort
 271     # Output: stdout: timestamp (ISO-8601, no separators)
 272     local TIME_CURRENT TIME_CURRENT_SHORT
 273     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 274     TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"; # Produce separator-less current timestamp with resolution 1 second.
 275     echo "$TIME_CURRENT_SHORT";
 276 } # Get date&time without separators
 277 main() {
 278     processArguments "$@" # Process arguments.
 279     if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active.
 280         if checkapp age; then # Check that age is available.
 281             for pubkey in "${recPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
 282                 vbm "DEBUG:Testing pubkey string:$pubkey"
 283                 if echo "butts" | age -a -r "$pubkey" 1>/dev/null; then
 284                     # Form age recipient string
 285                     recipients="$recipients""-r $pubkey ";
 286                     vbm "Added pubkey for forming age recipient string:""$pubkey";
 287                     vbm "DEBUG:recipients:""$recipients";
 288                 else
 289                     yell "ERROR:Exit code ""$?"". Invalid recipient pubkey string. Exiting."; exit 1;
 290                 fi
 291             done
 292             vbm "DEBUG:Finished processing recPubKeys array";
 293             # Form age command string
 294             CMD_ENCRYPT="age ""$recipients ";
 295             CMD_ENCRYPT_SUFFIX=".age";
 296         else
 297             yell "ERROR:Encryption enabled but \"age\" not found. Exiting."; exit 1;
 298         fi
 299     else
 300         CMD_ENCRYPT="tee /dev/null ";
 301         CMD_ENCRYPT_SUFFIX="";
 302         vbm "DEBUG:Encryption not enabled."
 303     fi
 304
 305     if [[ "$OPTION_COMPRESS" = "true" ]]; then # Check if compression option active
 306         if checkapp gzip; then # Check if gzip available
 307             CMD_COMPRESS="gzip ";
 308             CMD_COMPRESS_SUFFIX=".gz";
 309         else
 310             yell "ERROR:Compression enabled but \"gzip\" not found. Exiting."; exit 1;
 311         fi
 312     else
 313         CMD_COMPRESS="tee /dev/null ";
 314         CMD_COMPRESS_SUFFIX="";
 315         vbm "DEBUG:Compression not enabled."
 316     fi
 317
 318
 319     if checkapp gpspipe && checkdir "$DIROUT"; then
 320
 321         # # Set script lifespan to end at start of next day
 322         # if ! scriptTTL="$(timeUntilNextDay)"; then
 323         #     if [[ "$scriptTTL" -eq 0 ]]; then
 324         #       ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
 325         #     else
 326         #       yell "ERROR: timeUntilNextDay exit code $?"; exit 1;
 327         #     fi;
 328         # fi;
 329
 330         # Set script lifespan to end at start of next hour
 331         if ! scriptTTL="$(timeUntilNextHour)"; then
 332             if [[ "$scriptTTL" -eq 0 ]]; then
 333                 ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout.
 334             else
 335                 yell "ERROR: timeUntilNextHour exit code $?"; exit 1;
 336             fi;
 337         fi;
 338
 339         # Determine buffer lifespan
 340         bufferTTL="60";
 341
 342         # Record gps data until script lifespan ends
 343         declare debugCounter; debugCounter="0"
 344         while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
 345             ((debugCounter++))
 346             # Determine output file paths (time is start of buffer period)
 347             FILEOUT_BASENAME="$(dateTimeShort)""--P""$bufferTTL""S..""$SCRIPT_HOSTNAME""_location" ; # ISO-8601 YYYYmmddTHHMMSS+zzP[$bufferTTL]S
 348             FILEOUT_NMEA="$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
 349             FILEOUT_GPX="$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
 350             FILEOUT_KML="$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ;
 351             # Define GPS conversion commands
 352             CMD_CONV_NMEA="tee /dev/null "
 353             CMD_CONV_GPX="gpsbabel -i nmea -f - -o gpx -F - "
 354             CMD_CONV_KML="gpsbabel -i nmea -f - -o kml -F - "
 355             # Fill buffer
 356             buffer="$(timeout "$bufferTTL""s" gpspipe -r)"; # Record gpspipe nmea data to buffer for bufferTTL seconds
 357             # Execute processing and save command string
 358             echo "$buffer" | $CMD_CONV_NMEA | $CMD_COMPRESS | $CMD_ENCRYPT > "$DIROUT"/"$FILEOUT_NMEA" & # Save NMEA format
 359             echo "$buffer" | $CMD_CONV_GPX  | $CMD_COMPRESS | $CMD_ENCRYPT > "$DIROUT"/"$FILEOUT_GPX" & # Save GPX format
 360             echo "$buffer" | $CMD_CONV_KML  | $CMD_COMPRESS | $CMD_ENCRYPT > "$DIROUT"/"$FILEOUT_KML" & # Save KML format
 361             vbm "DEBUG:Completed buffer session $debugCounter ." 1>&2;
 362             # Reset buffer and filenames
 363             unset buffer FILEOUT_BASENAME FILEOUT_NMEA FILEOUT_GPX FILEOUT_KML;
 364         done
 365     fi
 366 } # Main function.
 367 #===END Declare local script functions===
 368 #==END Define script parameters==
 369
 370
 371 #==BEGIN Perform work and exit==
 372 main "$@" # Run main function.
 373 exit 0;
 374 #==END Perform work and exit==
 375
 376
 377
 378     #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;