Sample Linux filesystem create event watcher based on inotify(7) framework.

linux_watch_fs_create_event.sh

#!/bin/bash

handle() {
	file=$1
	if [ -f $file ]
	then
		{
			# Send on the background
			echo "Started processing '$file'"
			let "n = $RANDOM % 9 + 1"
			sleep .$n
			echo "Done converting '$file' in 0.${n}s"
		} &
	else
		echo "[watch] WARN: '$file' not a file" >&2
	fi
}

if [ $# -lt 1 ]
then
	printf "\nUsage:\n\t%s <directory>\n\n" $(basename $0) >&2
	exit 1
fi

inotifywait -m -q -r $1 -e create --format "%w%f" | while read f
do
	handle $f
done

err=$?
if [ $err -ne 0 ]
then
	echo "[watch] ERROR: exit status not zero: $err"
	exit 1
fi