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="/opt/bktei:$PATH"         # Add default baltakatei script install directory to PATH (necessary for other bk scripts)
   9 SCRIPT_HOSTNAME=$(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
  18 #===BEGIN Declare local script functions===
  19 checkapp() {
  20     # Desc: If arg is a command, save result in assoc array 'appRollCall'
  21     # Usage: checkapp arg1 arg2 arg3 ...
  22     # Input: global assoc. array 'appRollCall'
  23     # Output: adds/updates key(value) to global assoc array 'appRollCall'
  24     local returnState
  25     #echo "DEBUG:$(date +%S.%N)..Starting checkapp function."
  26     #echo "DEBUG:args: $@"
  27     #echo "DEBUG:returnState:$returnState"
  28
  29     #===Process Args===
  30     for arg in "$@"; do
  31         #echo "DEBUG:processing arg:$arg"
  32         if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
  33             appRollCall[$arg]="true";
  34             #echo "DEBUG:appRollCall[$arg]:"${appRollCall[$arg]}
  35             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  36         else
  37             appRollCall[$arg]="false"; returnState="false";
  38         fi
  39     done
  40
  41     #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
  42     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
  43
  44     #===Determine function return code===
  45     if [ "$returnState" = "true" ]; then
  46         #echo "DEBUG:checkapp returns true for $arg";
  47         return 0;
  48     else
  49         #echo "DEBUG:checkapp returns false for $arg";
  50         return 1;
  51     fi
  52 } # Check that app exists
  53 checkfile() {
  54     # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
  55     # Usage: checkfile arg1 arg2 arg3 ...
  56     # Input: global assoc. array 'fileRollCall'
  57     # Output: adds/updates key(value) to global assoc array 'fileRollCall';
  58     # Output: returns 0 if app found, 1 otherwise
  59     local returnState
  60
  61     #===Process Args===
  62     for arg in "$@"; do
  63         #echo "DEBUG:processing arg:$arg"
  64         if [ -f "$arg" ]; then
  65             fileRollCall["$arg"]="true";
  66             #echo "DEBUG:fileRollCall[\"$arg\"]:"${fileRollCall["$arg"]}
  67             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  68         else
  69             fileRollCall["$arg"]="false"; returnState="false";
  70         fi
  71     done
  72
  73     #for key in "${!fileRollCall[@]}"; do echo "DEBUG:fileRollCall key [$key] is:${fileRollCall[$key]}"; done
  74     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
  75
  76     #===Determine function return code===
  77     if [ "$returnState" = "true" ]; then
  78         #echo "DEBUG:checkapp returns true for $arg";
  79         return 0;
  80     else
  81         #echo "DEBUG:checkapp returns false for $arg";
  82         return 1;
  83     fi
  84 } # Check that file exists
  85 checkdir() {
  86     # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
  87     # Usage: checkdir arg1 arg2 arg3 ...
  88     # Input: global assoc. array 'dirRollCall'
  89     # Output: adds/updates key(value) to global assoc array 'dirRollCall';
  90     # Output: returns 0 if app found, 1 otherwise
  91     local returnState
  92
  93     #===Process Args===
  94     for arg in "$@"; do
  95         #echo "DEBUG:processing arg:$arg"
  96         if [ -d "$arg" ]; then
  97             dirRollCall["$arg"]="true";
  98             #echo "DEBUG:dirRollCall[\"$arg\"]:"${dirRollCall["$arg"]}
  99             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
 100         elif [ "$arg" = "" ]; then
 101             dirRollCall["$arg"]="false"; returnState="false";
 102         else
 103             returnState="false";
 104         fi
 105     done
 106
 107     #for key in "${!dirRollCall[@]}"; do echo "DEBUG:dirRollCall key [$key] is:${dirRollCall[$key]}"; done
 108     #echo "DEBUG:evaluating returnstate. returnState:"$returnState
 109
 110     #===Determine function return code===
 111     if [ "$returnState" = "true" ]; then
 112         #echo "DEBUG:checkapp returns true for $arg";
 113         return 0;
 114     else
 115         #echo "DEBUG:checkapp returns false for $arg";
 116         return 1;
 117     fi
 118 } # Check that dir exists
 119
 120 # Yell, Die, Try Three-Fingered Claw technique
 121 # Ref/Attrib: https://stackoverflow.com/a/25515370
 122 yell() { echo "$0: $*" >&2; }
 123 die() { yell "$*"; exit 111; }
 124 try() { "$@" || die "cannot $*"; }
 125
 126 echoerr() {
 127     echo "$@" 1>&2; # Define stderr echo function.
 128 } # Define stderr message function.
 129 showUsage() {
 130     echoerr "USAGE:"
 131     echoerr "    bkgpslog.sh [ options ]"
 132     echoerr
 133     echoerr "OPTIONS:"
 134     echoerr "    -h, --help"
 135     echoerr "            Display help information."
 136     echoerr
 137     echoerr "    --version"
 138     echoerr "            Display script version."
 139     echoerr
 140     echoerr "    -v, --verbose"
 141     echoerr "            Display debugging info."
 142     echoerr
 143     echoerr "    -o, --output [ directory ]"
 144     echoerr "            Specify output directory to save logs."
 145 } # Display information on how to use this script.
 146 showVersion() {
 147     echoerr "$SCRIPT_VERSION"
 148 } # Display script version.
 149 vbm() {
 150     # Usage: vbm "DEBUG:verbose message here"
 151     # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true".
 152     # Input:
 153     #   - OPTION_VERBOSE  variable set by processArguments function. (ex: "true", "false")
 154     #   - "$@"            positional arguments fed to this function.
 155     # Output: stderr
 156     # Script function dependencies: echoerr
 157     # External function dependencies: echo
 158     # Last modified: 2020-04-11T23:57Z
 159     # Last modified by: Steven Baltakatei Sandoval
 160     # License: GPLv3+
 161     # Ref./Attrib:
 162
 163     if [ "$OPTION_VERBOSE" = "true" ]; then
 164         FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds.
 165         echoerr "[$FUNCTION_TIME] ""$*"; # Display argument text.
 166     fi
 167
 168     # End function
 169     return 0; # Function finished.
 170 } # Verbose message display function.
 171 processArguments() {
 172     while [ ! $# -eq 0 ]; do   # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
 173         echoerr "DEBUG:Starting processArguments while loop."
 174         echoerr "DEBUG:Provided arguments are:""$*"
 175         case "$1" in
 176             --h | --help) showUsage; exit 1;; # Display usage.
 177             --version) showVersion; exit 1;; # Show version
 178             --v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode.
 179             --o | --output) if [ -d "$2" ]; then DIROUT="$2"; vbm "DEBUG:DIROUT:$DIROUT"; shift; fi ;; # Define output directory.
 180             *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options.
 181         esac
 182         shift
 183     done
 184 } # Argument Processing
 185 timeUntilMidnight(){
 186     # Desc: Report seconds until midnight
 187     # Output: stdout: integer seconds until midnight
 188     # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0
 189     # Usage: timeUntilMidnight
 190     # Usage: if ! myTTL="$(timeUntilMidnight)"; then yell "ERROR in if statement"; exit 1; fi
 191     local returnState
 192     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 193     TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)" # Produce separator-less current timestamp with resolution 1 second.
 194     DATE_CURRENT="$(date -d "$TIME_CURRENT" --iso-8601=date)" ; # Produce `date`-parsable current timestamp with resolution of 1 day.
 195     DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)" ; # Produce separator-less current timestamp with resolution 1 day.
 196     DATE_TOMORROW="$(date -d "$TIME_CURRENT next day" --iso-8601=date)" ; # Produce timestamp of tomorrow's date (res. 1 day).
 197     TIME_NEXT_MIDNIGHT="$(date -d "$DATE_TOMORROW" --iso-8601=seconds)" ; # Produce `date`-parsable timestamp of closest future midnight (res. 1 second).
 198     SECONDS_UNTIL_NEXT_MIDNIGHT="$(( $(date +%s -d "$TIME_NEXT_MIDNIGHT") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
 199     if [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -gt 0 ]]; then
 200         returnState="true";
 201     elif [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -eq 0 ]]; then
 202         returnState="WARNING_ZERO";
 203         yell "WARNING:Reported time until midnight exactly zero.";
 204     elif [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -lt 0 ]]; then
 205         returnState="WARNING_NEGATIVE";
 206         yell "WARNING:Reported time until midnight is negative.";
 207     fi
 208
 209     try echo "$SECONDS_UNTIL_NEXT_MIDNIGHT"; # Report
 210
 211     #===Determine function return code===
 212     if [[ "$returnState" = "true" ]]; then
 213         return 0;
 214     elif [[ "$returnState" = "WARNING_ZERO" ]]; then
 215         return 1;
 216     elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then
 217         return 2;
 218     fi
 219 } # Report seconds until next midnight
 220 dateTimeShort(){
 221     # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz)
 222     # Usage: dateTimeShort
 223     # Output: stdout: timestamp (ISO-8601, no separators)
 224     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
 225     TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"; # Produce separator-less current timestamp with resolution 1 second.
 226     echo "$TIME_CURRENT_SHORT";
 227 } # Get date&time without separators
 228 main() {
 229     processArguments "$@" # Process arguments.
 230     if checkapp gpspipe && checkdir "$DIROUT"; then
 231         # Determine output file paths
 232         FILEOUT_NMEA="$(dateTimeShort)".."$SCRIPT_HOSTNAME"_location.nmea ;
 233         #FILEOUT_GPX="" ;
 234         #FILEOUT_KML="" ;
 235
 236         # Determine script lifespan (note: exit if <= 0 since 'timeout' runs forever if provided "0s".
 237         #if ! scriptTTL="$(timeUntilMidnight)"; then yell "ERROR: timeUntilMidnight exit code $?"; exit 1; fi
 238         scriptTTL="60"; #DEBUG DEBUG DEBUG DEBUG
 239
 240         # Determine buffer lifespan
 241         bufferTTL="15";
 242
 243         # Record gps data until life ends
 244         declare debugCounter; debugCounter="0"
 245         while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
 246             ((debugCounter++))
 247             timeout "$bufferTTL""s" gpspipe -r 1>> "$DIROUT"/"$FILEOUT_NMEA""$debugCounter"
 248             vbm "DEBUG:Completed buffer session." 1>&2;
 249         done
 250     fi
 251 } # Main function.
 252 #===END Declare local script functions===
 253 #==END Define script parameters==
 254
 255
 256 #==BEGIN Perform work and exit==
 257 main "$@" # Run main function.
 258 exit 0;
 259 #==END Perform work and exit==
 260
 261
 262
 263     #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;