scripts/core/random_iter.sh

   1 #!/bin/bash
   2 COMMAND='play -v 10'
   3
   4 COUNT=$#
   5 if [ $COUNT -ne 1 -o ! -d $1 ]; then
   6         echo random_iter needs a directory name where the files to be randomly
   7         echo chosen from are located.
   8         \exit 0
   9 fi
  10
  11 NUMBER_OF_FILES=$(ls -1 $1/* | wc | awk '{ print $1; }')
  12
  13 if [ $NUMBER_OF_FILES -lt 1 ]; then
  14         echo There are no files in $1.
  15         \exit 0
  16 fi
  17
  18 RANDOM_CHOICE=$(expr $RANDOM % $NUMBER_OF_FILES + 1)
  19 CURRENT_PLACE=1
  20 for i in $1/*; do
  21   if [ $CURRENT_PLACE = $RANDOM_CHOICE ]; then
  22     $COMMAND $i
  23     \exit 0
  24   fi
  25   CURRENT_PLACE=$(expr $CURRENT_PLACE + 1)
  26 done