lspid.sh: given pid, list open files & seek offsets (effectively watch progress, if util scans large file front to back)

lspid.sh

#!/bin/bash

TARGET_PID=$1
shift
cd /proc/$TARGET_PID/fd/
if [ -n "$1" ]
then
  TARGET_FDS=$@
else
  TARGET_FDS=*
fi
for fd in $TARGET_FDS
do
  stat -c"%N" $fd
  offset=`head -1 /proc/$TARGET_PID/fdinfo/$fd | cut -f2`
  length=`stat -L -c"%s" $fd`
  echo -n "$offset/$length "
  if [ $length -gt 0 ]
  then
    echo "($(($offset*100/$length))%)"
  else
    echo
  fi
done