#!/bin/sh# This wrapper provides automatic reloading on file modifications# to the pdfviewer llpp via inotify. # Prepare parameters.cd "$(dirname "$1")"pdf=$(basename "$1")shiftpassthrough="$@" # Return with an error if the given file does not exist.if [ ! -e "$pdf" ]; then    echo "$pdf: No such file or directory"    exit 1fi # Start llpp with the given file.llpp "$pdf" $passthrough & # Track the PID of the llpp instance.pid_llpp=$! # Kill the llpp instance if the shell script terminates.trap "kill ${pid_llpp}" SIGINT SIGTERM SIGQUIT SIGKILL # Watch for changes in the directory of the given file. This is necessary# to recieve events after the file was deleted.inotifywait -m -e close_write "$PWD" -q --format "%f"| while read file; do    # Only refresh on events of the file in question and if this file exists.    if [ "$file" = "$pdf" ] && [ -e "$pdf" ]; then        kill -HUP $pid_llpp    fidone & # If llpp terminates kill the inotifywait process.wait $pid_llpppkill -P $$cd - > /dev/null