psax.sh

	#!/bin/bash
printf "%5s %-8s %-5s %2s:%02d %s \n" "PID" "TTY" "STAT" "TIME" "COMMAND"
for i in /proc/[0-9]*; do
	

	#read pid cmd state ppid pgrp sid tty_nr tpgid other < $i/stat
	#     1         2          3            4         5       6        7        8            9       10        11      12       13       14       15       16        17      18        19
	#     $pid      $cmd       $state       $ppid     $pgrp   $sid     $tty_nr  $tpgid      flags    minflt   cminfflt majflt   cmajflt  utime    stime    cutime   cstime   priority  nice
	regex='([0-9]*) \((.*)\).* ([DRSTWXZ]+) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) (\-?[0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*) (\-?[0-9]*) ([0-9]*) ([0-9]*) ([0-9]*)' 
	read out < $i/stat
	#echo $out
	if [[ $out =~ $regex ]]; then
		major=$((${BASH_REMATCH[7]} >> 8))
		minor=$((${BASH_REMATCH[7]} & 0xFF))
	
		#echo "nice: ${BASH_REMATCH[18]} == ${BASH_REMATCH[19]}"

		# get TYY name
		# major 136-143 - for pts
		p_tty=""
		state=${BASH_REMATCH[3]}
		if [ $major -ge 136 ] && [ $major -le 143 ]; then
			# p_tty="pts/"$(ls -lha /dev/pts/ | grep "$major, $minor" | grep -o '[^ ]*$')
			p_tty="pts/"$[$minor + $[$major - 136] * 256]
		else 
			if ! [ -e "$(readlink -f /sys/dev/char/$major\:$minor)" ]; then
				p_tty="?"
			else
				p_tty=$(readlink /sys/dev/char/$major\:$minor | grep -o '[^\/]*$')
			fi
		fi

		# process name or cmdline	
		if [ $(cat $i/cmdline | wc -c) -eq 0 ]; then
			# procname="["$( echo $cmd | awk -F '[()]' '{print $2}' )"]"
			procname="["${BASH_REMATCH[2]}"]"
		else
			procname=$( cat $i/cmdline | tr '\0' ' ' )
		fi

		#TIME
		hz=$(getconf CLK_TCK)
		t_total_ticks=$((${BASH_REMATCH[14]} + ${BASH_REMATCH[15]}))
		t_min=$(( ($t_total_ticks / $hz) / 60 ))
		t_sec=$(( ($t_total_ticks / $hz) - $t_min * 60 ))

		#       <    high-priority (not nice to other users)
		if [ ${BASH_REMATCH[19]} -gt 0 ] && [ ${BASH_REMATCH[19]} -le 20 ]; then state=$state"N"; fi
		if [ ${BASH_REMATCH[19]} -ge -29 ] && [ ${BASH_REMATCH[19]} -lt 0 ]; then state=$state"<"; fi

		#L    has pages locked into memory (for real-time and custom IO)
		locked=$(cat $i/status | grep VmLck: | tr -s ' ' | cut -f 2 -d " ") 
		if  ! [ -z $locked ] && ! [ $locked -eq 0 ]; 
			then state=$state"L"; fi

		# state
		#s    is a session leader
		if [ ${BASH_REMATCH[1]} -eq ${BASH_REMATCH[6]} ]; 
			then state=$state"s"; fi
		
		#l    is multi-threaded 
		if [ -d "$i/task" ]; 
			then state=$state"l"; fi
		#echo {"pid:"${BASH_REMATCH[1]} "tpgid:"${BASH_REMATCH[8]} }
		
		#+    is in the foreground process group
		if [ ${BASH_REMATCH[1]} -eq ${BASH_REMATCH[8]} ]; 
			then state=$state"+"; fi

		printf "%5s %-8s %-5s %2s:%02d %s \n" ${BASH_REMATCH[1]} "$p_tty" $state $t_min $t_sec "$procname" | cut -c-$(tput cols)
	fi
done