unitproc/bkFreqWrite

   1 #!/bin/bash
   2 # Desc: Writes stdin to disk every 5 seconds
   3
   4 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
   5 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
   6 try() { "$@" || die "cannot $*"; } #o
   7
   8 declare -a buffer # Initialize buffer array
   9 scriptTTL="15";
  10 bufferTTL="5";
  11
  12 magicWriteBuffer() {
  13     printf "%s\n" "${buffer[@]}" | cat | cat | cat >> /dev/shm/$(date +%s)..bkFreqWrite-output1.txt;
  14     printf "%s\n" "${buffer[@]}" | cat | cat | cat >> /dev/shm/$(date +%s)..bkFreqWrite-output2.txt;
  15     printf "%s\n" "${buffer[@]}" | cat | cat | cat >> /dev/shm/$(date +%s)..bkFreqWrite-output3.txt;
  16 }
  17
  18 bufferRound=0;
  19 # Run until script TTL seconds pass
  20 while [[ $SECONDS -lt "scriptTTL" ]]; do
  21     bufferTOD="$((SECONDS + $bufferTTL))";
  22     lineCount=0;
  23     # Consume stdin to fill buffer until buffer time-of-death (TOD) arrives
  24     while read -r line && [[ $SECONDS -lt "$bufferTOD" ]]; do
  25         # Append line to buffer
  26         buffer+=("$line");
  27         echo "DEBUG:Processing line:$lineCount";
  28         echo "DEBUG:Current line   :$line";
  29         echo "DEBUG:buf elem count :${#buffer[@]}";
  30         ((lineCount++));
  31     done;
  32     # Export buffer to asynchronous processing.
  33     magicWriteBuffer &
  34     unset buffer;
  35     # Increment buffer round
  36     ((bufferRound++));
  37 done;
  38
  39 # Author: Steven Baltakatei Sandoval
  40 # License: GPLv3+