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
   7 # Logging Behavior parameters
   8 scriptTTL_TE="day"; # Time element at the end of which script terminates
   9 scriptTTL="15"; # (temp) Time (seconds) until script terminates
  10 bufferTTL="5"; # Time-to-live (seconds) for each buffer round
  11 dirTempDefault="/dev/shm"; # Default parent of working directory
  12
  13 # Script Metadata
  14 scriptVersion="0.1.1";          # Define version of script.
  15 scriptName="bklog";             # Define basename of script file.
  16 PATH="$HOME/.local/bin:$PATH"; # Add "$(systemd-path user-binaries)" path in case user apps saved there
  17
  18 # Arrays
  19 declare -a buffer # Initialize buffer array
  20
  21 # Variables
  22
  23 #===END Initialize variables===
  24
  25 #===BEGIN Declare local script functions===
  26 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
  27 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
  28 try() { "$@" || die "cannot $*"; } #o
  29 magicProcessWriteBuffer() {
  30     printf "%s\\n" "${buffer[@]}" | cat | cat | cat >> "/dev/shm/$(date +%s)..bkFreqWrite-output1.txt";
  31     printf "%s\\n" "${buffer[@]}" | cat | cat | cat >> "/dev/shm/$(date +%s)..bkFreqWrite-output2.txt";
  32     printf "%s\\n" "${buffer[@]}" | cat | cat | cat >> "/dev/shm/$(date +%s)..bkFreqWrite-output3.txt";
  33 } # Process and Write buffer
  34 main() {
  35     bufferRound=0;
  36     # Run until script TTL seconds pass
  37     while [[ $SECONDS -lt "scriptTTL" ]]; do
  38         bufferTOD="$((SECONDS + bufferTTL))";
  39         lineCount=0;
  40         # Consume stdin to fill buffer until buffer time-of-death (TOD) arrives
  41         while read -r -t "$bufferTTL" line && [[ $SECONDS -lt "$bufferTOD" ]]; do
  42             # Append line to buffer array
  43             buffer+=("$line");
  44             echo "DEBUG:Processing line:$lineCount";
  45             echo "DEBUG:Current line   :$line";
  46             echo "DEBUG:buf elem count :${#buffer[@]}";
  47             ((lineCount++));
  48         done;
  49         # Export buffer to asynchronous processing.
  50         magicProcessWriteBuffer &
  51         unset buffer; # Clear buffer array for next bufferRound
  52         # Increment buffer round
  53         ((bufferRound++));
  54     done;
  55 }
  56
  57 #===END Declare local script functions===
  58 #==END Define script parameters==
  59
  60 #==BEGIN Perform work and exit==
  61 main "$@" # Run main function.
  62 exit 0;
  63 #==END Perform work and exit==
  64
  65 # Author: Steven Baltakatei Sandoval;
  66 # License: GPLv3+