idle

#!/bin/bash

###
# 显示闲置用户，参数是闲置阈值（秒），默认半小时
# 输出闲置超过阈值的用户名，每行一个
# 如果不在管道中，标准错误会输出更多信息
###


CURRENT="$(date +%s)"

declare -A TIMEOUT_LIST
declare -A NOT_TIMEOUT_LIST

SECONDS="${1-1800}"

TTY=/bin/false
if [ -t 1 ] && [ -t 0 ] ; then
	TTY=/bin/true
fi

function calc () {
	local UNAME="$1"
	local DEV="/dev/$2"
	
	local LAST_ACC="$(stat -c "%X" "$DEV")"
	local IDLE="$(( $CURRENT - $LAST_ACC ))"
	
	$TTY && echo -n "$UNAME: ${IDLE} > ${SECONDS} ? :" >&2
	if [ "${IDLE}" -gt "${SECONDS}" ]; then
		$TTY && echo "timeout" >&2
		TIMEOUT_LIST[$UNAME]="yes"
	else
		$TTY && echo "not timeout" >&2
		NOT_TIMEOUT_LIST[$UNAME]="yes"
	fi
}

WHO="$(who -s | grep 'pts/')"
USER_LIST=($(echo "$WHO" | awk '{print $1}'))
PTS_LIST=($(echo "$WHO" | awk '{print $2}'))

for I in "${!PTS_LIST[@]}"
do
	calc "${USER_LIST[$I]}" "${PTS_LIST[$I]}"
done

for USER in "${!TIMEOUT_LIST[@]}"
do
	
	if [ -n "${NOT_TIMEOUT_LIST[$USER]}" ]; then
		$TTY && echo "User is active: $USER" >&2
		continue
	fi
	echo "$USER"
	$TTY && echo "User is TIMEOUT: $USER" >&2
done