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 # Logging Behavior parameters
   7 scriptTTL="15";
   8 bufferTTL="5";
   9
  10 # Script Metadata
  11 scriptVersion="0.1.0";          # Define version of script.
  12 scriptName="bklog";             # Define basename of script file.
  13
  14 # Arrays
  15 declare -a buffer # Initialize buffer array
  16
  17 # Variables
  18
  19 #===END Initialize variables===
  20
  21 #===BEGIN Declare local script functions===
  22 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
  23 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
  24 try() { "$@" || die "cannot $*"; } #o
  25 magicProcessWriteBuffer() {
  26     printf "%s\\n" "${buffer[@]}" | cat | cat | cat >> "/dev/shm/$(date +%s)..bkFreqWrite-output1.txt";
  27     printf "%s\\n" "${buffer[@]}" | cat | cat | cat >> "/dev/shm/$(date +%s)..bkFreqWrite-output2.txt";
  28     printf "%s\\n" "${buffer[@]}" | cat | cat | cat >> "/dev/shm/$(date +%s)..bkFreqWrite-output3.txt";
  29 } # Process and Write buffer
  30 main() {
  31     bufferRound=0;
  32     # Run until script TTL seconds pass
  33     while [[ $SECONDS -lt "scriptTTL" ]]; do
  34         bufferTOD="$((SECONDS + bufferTTL))";
  35         lineCount=0;
  36         # Consume stdin to fill buffer until buffer time-of-death (TOD) arrives
  37         while read -r -t "$bufferTTL" line && [[ $SECONDS -lt "$bufferTOD" ]]; do
  38             # Append line to buffer array
  39             buffer+=("$line");
  40             echo "DEBUG:Processing line:$lineCount";
  41             echo "DEBUG:Current line   :$line";
  42             echo "DEBUG:buf elem count :${#buffer[@]}";
  43             ((lineCount++));
  44         done;
  45         # Export buffer to asynchronous processing.
  46         magicProcessWriteBuffer &
  47         unset buffer; # Clear buffer array for next bufferRound
  48         # Increment buffer round
  49         ((bufferRound++));
  50     done;
  51 }
  52
  53 #===END Declare local script functions===
  54 #==END Define script parameters==
  55
  56 #==BEGIN Perform work and exit==
  57 main "$@" # Run main function.
  58 exit 0;
  59 #==END Perform work and exit==
  60
  61 # Author: Steven Baltakatei Sandoval;
  62 # License: GPLv3+