init_03.sh

#!/bin/bash

#**************************************************************************************
#	Functions

usage() {
	cat << STOP
Name: $0

Description: User Infos

Usage: $0 uids...

columns:
	-User	: user name
	-UID	: user id
	-GID	: group id
	-N.GR	: nymber of groups a user belong
	-N.PS	: number of processes running owned by a user
	-%MEM	: memory percentage
	-%CPU	: cpu percentage
	-last_login	: last login
STOP
}

user()
{
	id -un $uid;
}

gid() {
	id $uid -g
}

n_groups()
{
	groups `user` | cut -d: -f2 | wc -w
}

n_ps()
{
	ps aux | grep ^`user` | wc -l
}

mem()
{
	ps aux | grep ^`user` | awk 'BEGIN {mem=0.0}; {mem += $4}END {printf "%.1f\n", mem}'
}

cpu()
{
	ps aux | grep ^`user` | awk 'BEGIN {cpu=0.0}; {cpu += $4}END {printf "%.1f\n", cpu}'
}

_last()
{
	last `user` | grep -o "\(Mon\|Tue\|Wed\|Thu\|Fri\|Sat\|Sun\).*" | head -1
}

header()
{
	format_output "User UID GID N.GR N.PS %MEM %CPU last_login";
	printf "_%.0s" {1..100};
	echo
}

format_output()
{
	echo $@ | awk '{printf "%-15s%-8s%-8s%-8s%-8s%-8s%-8s%s\n", $1, $2, $3, $4, $5, $6, $7, substr($0, index($0,$8)) }'
}

user_info()
{
	format_output "`user` $uid `gid` `n_groups` `n_ps` `mem` `cpu` `_last`";
}

main()
{
	h=1;
	for uid in $@
	do
		id $uid 1>/dev/null 2>/dev/null;
		if [ $? -ne 1 ]
		then
			if [ $h -eq 1 ]
			then
				header;
				h=0;
			fi
			format_output `user_info`;
		fi
	done
}

#**************************************************************************************
#	Program Start

if [ $# -lt 1 ]
then
	usage;
	exit 1;
fi

main $@;