unitproc/bkFreqWrite

   1 #!/bin/bash
   2 # Desc: Writes stdin to disk every 5 seconds
   3 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
   4 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
   5 try() { "$@" || die "cannot $*"; } #o
   6 declare -a buffer # Initialize buffer array
   7 scriptTTL="15";
   8 bufferTTL="5";
   9 magicWriteBuffer() {
  10     printf "%s\n" "${buffer[@]}" | cat | cat | cat >> /dev/shm/$(date +%s)..bkFreqWrite-output1.txt;
  11     printf "%s\n" "${buffer[@]}" | cat | cat | cat >> /dev/shm/$(date +%s)..bkFreqWrite-output2.txt;
  12     printf "%s\n" "${buffer[@]}" | cat | cat | cat >> /dev/shm/$(date +%s)..bkFreqWrite-output3.txt;
  13 }
  14
  15 bufferRound=0;
  16 # Run until script TTL seconds pass
  17 while [[ $SECONDS -lt "scriptTTL" ]]; do
  18     bufferTOD="$((SECONDS + $bufferTTL))";
  19     lineCount=0;
  20     # Consume stdin to fill buffer until buffer time-of-death (TOD) arrives
  21     while read -r line && [[ $SECONDS -lt "$bufferTOD" ]]; do
  22         # Append line to buffer array
  23         buffer+=("$line");
  24         echo "DEBUG:Processing line:$lineCount";
  25         echo "DEBUG:Current line   :$line";
  26         echo "DEBUG:buf elem count :${#buffer[@]}";
  27         ((lineCount++));
  28     done;
  29     # Export buffer to asynchronous processing.
  30     magicWriteBuffer &
  31     unset buffer; # Clear buffer array for next bufferRound
  32     # Increment buffer round
  33     ((bufferRound++));
  34 done;
  35
  36 # Author: Steven Baltakatei Sandoval
  37 # License: GPLv3+