List watched files by a PID

inotify_list.sh

#!/usr/bin/env bash

set -e

LIST="$(grep inotify /proc/"$1"/fdinfo/* | \
  awk '{print $3,$4}' | \
  sed -r 's/ino:([^ ]+) sdev:(.{2})(.*)/\1 \2 \3/' | \
    while read -r inode devmajor devminor; do
      dec_inode=$((16#$inode))
      dec_devmajor=$((16#$devmajor))
      dec_devminor=$((16#$devminor))
      echo "$dec_inode" #$dec_devminor $dec_devmajor"
    done
)"

PROC_CWD=$(realpath /proc/"$1"/cwd)

count=0

M=("-inum 0")
for i in $LIST; do
    count=$((count+1))
    M+=("-o -inum $i")
    if [ "$count" -eq 500 ]; then
      sudo find "$PROC_CWD" \( ${M[@]} \) -print
      M=("-inum 0")
      count=0
    fi
done

if [ "$count" -gt 0 ]; then
  sudo find "$PROC_CWD" \( ${M[@]} \) -print
fi