fix(bkgpslog):Apply shellcheck corrections

[EVA-2020-02.git] / exec / bkgpslog

diff --git a/exec/bkgpslog b/exec/bkgpslog
index 043dc05c5d766e272815d9dbd5659bd613a63f35..9a3744a01cb97ab64d19138356ed74953d4d714a 100755 (executable)
--- a/exec/bkgpslog
+++ b/exec/bkgpslog
@@ -1,19 +1,120 @@
 #!/bin/bash
 
 #!/bin/bash
 

-# Author: Steven Baltakatei Sandoval
+# Desc: Records gps data until midnight
+# Author: Steven Baltakatei Sandoval; License: GPLv3+
+# Usage: bkgpslog --output [output dir]

 
 

-#== Variable Initialization ==
-
-#== Global constants ==
-PATH="/usr/local/bin/:$PATH"    # Add default OpenTimestamps path to PATH (necessary if cron used to call this script)
+#==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.
 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.

-#DIROUT1="/home/pi/Sync/Evanescent_Location"  # Define output directory.

 
 

-#== Script Function Definitions ==
+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; }
 # Yell, Die, Try Three-Fingered Claw technique
 # Ref/Attrib: https://stackoverflow.com/a/25515370
 yell() { echo "$0: $*" >&2; }


@@ -44,69 +145,117 @@ showVersion() {
     echoerr "$SCRIPT_VERSION"
 } # Display script version.
 vbm() {
     echoerr "$SCRIPT_VERSION"
 } # Display script version.
 vbm() {

-    if [ $OPTION_VERBOSE -eq "true" ]; then
-       echoerr "$@"
+    # 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
     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."
 } # 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:""$@"
+       echoerr "DEBUG:Provided arguments are:""$*"

        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.
        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 DIROUT1="$2"; fi ;; # Define output directory.
+           --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
            *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options.
        esac
        shift
     done
 } # Argument Processing

-checkExecutables() {
-    
-} # Check that certain executables exist.
+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() {
 main() {

-    processArguments # Process arguments.
-    checkExecutables "gpspipe" # Confirm that executables necessary to run are available.
-} # Main function.
+    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==

 
 
 
 

-if [[ -d "$DIROUT1" ]] && command -v "gpspipe" 1>/dev/null 2>/dev/null ; then
-    while true; do
-       #echoerr "DEBUG:Starting while loop."
-       # Update time constants
-       TIME_CURRENT="$(date --iso-8601=seconds)" ;
-       #echoerr "DEBUG:TIME_CURRENT is:""$TIME_CURRENT" ;
-       TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"
-       #echoerr "DEBUG:TIME_CURRENT_SHORT is""$TIME_CURRENT_SHORT"
-       DATE_CURRENT="$(date -d "$TIME_CURRENT" --iso-8601=date)" ;
-       #echoerr "DEBUG:DATE_CURRENT is:""$DATE_CURRENT" ;
-       DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)" ;
-       #echoerr "DEBUG:DATE_CURRENT is:""$DATE_CURRENT_SHORT" ;
-       DATE_TOMORROW="$(date -d "$TIME_CURRENT next day" --iso-8601=date)" ;
-       #echoerr "DEBUG:DATE_TOMORROW is:""$DATE_TOMORROW" ;
-       TIME_NEXT_MIDNIGHT="$(date -d "$DATE_TOMORROW" --iso-8601=seconds)" ;
-       #echoerr "DEBUG:TIME_NEXT_MIDNIGHT is:""$TIME_NEXT_MIDNIGHT" ;
-       SECONDS_UNTIL_NEXT_MIDNIGHT="$((  $(date +%s -d "$TIME_NEXT_MIDNIGHT") - $(date +%s -d "$TIME_CURRENT")  ))" ;
-       #echoerr "DEBUG:SECONDS_UNTIL_NEXT_MIDNIGHT is:""$SECONDS_UNTIL_NEXT_MIDNIGHT" ;
-       if [ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -eq 0 ]; then echoerr "WARNING:Is it exactly midnight?" ; continue; fi ; # Exit loop early if equal to 0 because "timeout 0s" never ends.
-       if [ "$SECONDS_UNTIL_NEXT_MIDNIGHT" -lt 0 ]; then echoerr "ERROR:Time until midnight error." ; exit 1; fi ; # Exit script if equal to 0 because "timeout 0s" never ends.
-       
-       # Update output file names.
-       DIROUTN="$DIROUT1" ;
-       FILEOUTN="$DATE_CURRENT_SHORT""..""$(hostname)""_location.nmea" ;
-
-       # Append location log until midnight.
-       timeout "$SECONDS_UNTIL_NEXT_MIDNIGHT""s" gpspipe -r 1>> "$DIROUTN"/"$FILEOUTN" 2>>/dev/null ; # log raw nmea data
-    done

     
     #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;
     
     #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ;

-    
-else
-    echo "$SCRIPT_TIME_SHORT"">gpspipe or $DIROUT1 not found." >> ~/"$SCRIPT_DATE_SHORT"..error.log ;
-fi