fd_count.sh: Watch open file descriptors count for a process.

gistfile1.txt

#!/bin/sh
# Usage: sh fd_count.sh PID

RE='^[0-9]+$'

while :; do 
	clear;

	for pid in `ps aux | awk '{print $2}'`; do
	    if [[ $pid =~ $RE ]] ; then
	        FCOUNT=`lsof -p $pid | grep -v " txt " | wc -l`;
	    	echo "PID: $pid $FCOUNT";
	    fi
	# done | sort -nk3 | grep $1;
	done | grep $1;

	sleep 5;
done