#!/bin/bash # Desc: Records gps data until midnight # Author: Steven Baltakatei Sandoval; License: GPLv3+ # Usage: bkgpslog --output [output dir] #==BEGIN Define script parameters== PATH="/opt/bktei:$PATH" # Add default baltakatei script install directory to PATH (necessary for other bk scripts) SCRIPT_HOSTNAME=$(hostname) # Save hostname of system running this script. SCRIPT_VERSION="bkgpslog 0.0.1" # Define version of script. SCRIPT_TIME_SHORT="$(date +%Y%m%dT%H%M%S%z)" # Save current date & time in ISO-8601 format. SCRIPT_DATE_SHORT="$(date +%Y%m%d)" # Save current date in ISO-8601 format. declare -Ag appRollCall # Associative array for storing app status declare -Ag fileRollCall # Associative array for storing file status declare -Ag dirRollCall # Associative array for storing dir status #===BEGIN Declare local script functions=== checkapp() { # Desc: If arg is a command, save result in assoc array 'appRollCall' # Usage: checkapp arg1 arg2 arg3 ... # Input: global assoc. array 'appRollCall' # Output: adds/updates key(value) to global assoc array 'appRollCall' local returnState #echo "DEBUG:$(date +%S.%N)..Starting checkapp function." #echo "DEBUG:args: $@" #echo "DEBUG:returnState:$returnState" #===Process Args=== for arg in "$@"; do #echo "DEBUG:processing arg:$arg" if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command appRollCall[$arg]="true"; #echo "DEBUG:appRollCall[$arg]:"${appRollCall[$arg]} if ! [ "$returnState" = "false" ]; then returnState="true"; fi else appRollCall[$arg]="false"; returnState="false"; fi done #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done #echo "DEBUG:evaluating returnstate. returnState:"$returnState #===Determine function return code=== if [ "$returnState" = "true" ]; then #echo "DEBUG:checkapp returns true for $arg"; return 0; else #echo "DEBUG:checkapp returns false for $arg"; return 1; fi } # Check that app exists checkfile() { # Desc: If arg is a file path, save result in assoc array 'fileRollCall' # Usage: checkfile arg1 arg2 arg3 ... # Input: global assoc. array 'fileRollCall' # Output: adds/updates key(value) to global assoc array 'fileRollCall'; # Output: returns 0 if app found, 1 otherwise local returnState #===Process Args=== for arg in "$@"; do #echo "DEBUG:processing arg:$arg" if [ -f "$arg" ]; then fileRollCall["$arg"]="true"; #echo "DEBUG:fileRollCall[\"$arg\"]:"${fileRollCall["$arg"]} if ! [ "$returnState" = "false" ]; then returnState="true"; fi else fileRollCall["$arg"]="false"; returnState="false"; fi done #for key in "${!fileRollCall[@]}"; do echo "DEBUG:fileRollCall key [$key] is:${fileRollCall[$key]}"; done #echo "DEBUG:evaluating returnstate. returnState:"$returnState #===Determine function return code=== if [ "$returnState" = "true" ]; then #echo "DEBUG:checkapp returns true for $arg"; return 0; else #echo "DEBUG:checkapp returns false for $arg"; return 1; fi } # Check that file exists checkdir() { # Desc: If arg is a dir path, save result in assoc array 'dirRollCall' # Usage: checkdir arg1 arg2 arg3 ... # Input: global assoc. array 'dirRollCall' # Output: adds/updates key(value) to global assoc array 'dirRollCall'; # Output: returns 0 if app found, 1 otherwise local returnState #===Process Args=== for arg in "$@"; do #echo "DEBUG:processing arg:$arg" if [ -d "$arg" ]; then dirRollCall["$arg"]="true"; #echo "DEBUG:dirRollCall[\"$arg\"]:"${dirRollCall["$arg"]} if ! [ "$returnState" = "false" ]; then returnState="true"; fi else dirRollCall["$arg"]="false"; returnState="false"; fi done #for key in "${!dirRollCall[@]}"; do echo "DEBUG:dirRollCall key [$key] is:${dirRollCall[$key]}"; done #echo "DEBUG:evaluating returnstate. returnState:"$returnState #===Determine function return code=== if [ "$returnState" = "true" ]; then #echo "DEBUG:checkapp returns true for $arg"; return 0; else #echo "DEBUG:checkapp returns false for $arg"; return 1; fi } # Check that dir exists # Yell, Die, Try Three-Fingered Claw technique # Ref/Attrib: https://stackoverflow.com/a/25515370 yell() { echo "$0: $*" >&2; } die() { yell "$*"; exit 111; } try() { "$@" || die "cannot $*"; } echoerr() { echo "$@" 1>&2; # Define stderr echo function. } # Define stderr message function. showUsage() { echoerr "USAGE:" echoerr " bkgpslog.sh [ options ]" echoerr echoerr "OPTIONS:" echoerr " -h, --help" echoerr " Display help information." echoerr echoerr " --version" echoerr " Display script version." echoerr echoerr " -v, --verbose" echoerr " Display debugging info." echoerr echoerr " -o, --output [ directory ]" echoerr " Specify output directory to save logs." } # Display information on how to use this script. showVersion() { echoerr "$SCRIPT_VERSION" } # Display script version. vbm() { # Usage: vbm "DEBUG:verbose message here" # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true". # Input: # - OPTION_VERBOSE variable set by processArguments function. (ex: "true", "false") # - "$@" positional arguments fed to this function. # Output: stderr # Script function dependencies: echoerr # External function dependencies: echo # Last modified: 2020-04-11T23:57Z # Last modified by: Steven Baltakatei Sandoval # License: GPLv3+ # Ref./Attrib: if [ "$OPTION_VERBOSE" = "true" ]; then FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds. echoerr "[$FUNCTION_TIME] ""$*"; # Display argument text. fi # End function return 0; # Function finished. } # Verbose message display function. processArguments() { while [ ! $# -eq 0 ]; do # While number of arguments ($#) is not (!) equal to (-eq) zero (0). echoerr "DEBUG:Starting processArguments while loop." echoerr "DEBUG:Provided arguments are:""$*" case "$1" in --h | --help) showUsage; exit 1;; # Display usage. --version) showVersion; exit 1;; # Show version --v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode. --o | --output) if [ -d "$2" ]; then DIROUT="$2"; fi ;; # Define output directory. *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options. esac shift done } # Argument Processing timeUntilMidnight(){ # Desc: Report seconds until midnight # Output: stdout: integer seconds until midnight # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0 # Usage: timeUntilMidnight # Usage: if ! myTTL="$(timeUntilMidnight)"; then yell "ERROR in if statement"; exit 1; fi local returnState TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second. TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)" # Produce separator-less current timestamp with resolution 1 second. DATE_CURRENT="$(date -d "$TIME_CURRENT" --iso-8601=date)" ; # Produce `date`-parsable current timestamp with resolution of 1 day. DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)" ; # Produce separator-less current timestamp with resolution 1 day. DATE_TOMORROW="$(date -d "$TIME_CURRENT next day" --iso-8601=date)" ; # Produce timestamp of tomorrow's date (res. 1 day). TIME_NEXT_MIDNIGHT="$(date -d "$DATE_TOMORROW" --iso-8601=seconds)" ; # Produce `date`-parsable timestamp of closest future midnight (res. 1 second). SECONDS_UNTIL_NEXT_MIDNIGHT="$(( $(date +%s -d "$TIME_NEXT_MIDNIGHT") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second). if [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -gt 0 ]]; then returnState="true"; elif [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -eq 0 ]]; then returnState="WARNING_ZERO"; yell "WARNING:Reported time until midnight exactly zero."; elif [[ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -lt 0 ]]; then returnState="WARNING_NEGATIVE"; yell "WARNING:Reported time until midnight is negative."; fi try echo "$SECONDS_UNTIL_NEXT_MIDNIGHT"; # Report #===Determine function return code=== if [[ "$returnState" = "true" ]]; then return 0; elif [[ "$returnState" = "WARNING_ZERO" ]]; then return 1; elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then return 2; fi } # Report seconds until next midnight dateTimeShort(){ # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz) # Usage: dateTimeShort # Output: stdout: timestamp (ISO-8601, no separators) TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second. TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"; # Produce separator-less current timestamp with resolution 1 second. echo "$TIME_CURRENT_SHORT"; } # Get date&time without separators main() { processArguments "$@" # Process arguments. if checkapp gpspipe && checkdir "$DIROUT"; then # Determine output file paths FILEOUT_NMEA="$(dateTimeShort)".."$SCRIPT_HOSTNAME"_location.nmea ; #FILEOUT_GPX="" ; #FILEOUT_KML="" ; # Determine script lifespan (note: exit if <= 0 since 'timeout' runs forever if provided "0s". #if ! scriptTTL="$(timeUntilMidnight)"; then yell "ERROR: timeUntilMidnight exit code $?"; exit 1; fi scriptTTL="60"; #DEBUG DEBUG DEBUG DEBUG # Determine buffer lifespan bufferTTL="15"; # Record gps data until life ends declare debugCounter; debugCounter="0" while [[ "$SECONDS" -lt "$scriptTTL" ]]; do ((debugCounter++)) timeout "$bufferTTL""s" gpspipe -r 1>> "$DIROUT"/"$FILEOUT_NMEA""$debugCounter" echo "do stuff" 1>&2; done fi } # Main function. #===END Declare local script functions=== #==END Define script parameters== #==BEGIN Perform work and exit== main "$@" # Run main function. exit 0; #==END Perform work and exit== #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;