Mac OS X: 实用脚本程序(bash scripts)系列-2

这次摘录一个Mac大侠编写的脚本，这个脚本在7pm后，在没有用户使用时试图关机，如果有用户登陆则试图进入休眠模式. 管理员可以在StartupItem中加入，使之运行. 使网络环境更绿色 .

如下：


#!/bin/sh


# Sleep or shutdown script

# tryin' to be 'green'.....


# look for exception file

if [ -f "/var/db/.dontSleep" ]; then

	exit 0

fi


# if we're a laptop, exit.

# No shutting down laptops (or waking them up unbidden!)

IS_LAPTOP=`/usr/sbin/system_profiler SPHardwareDataType | grep "Model" | grep "Book"`

if [ "$IS_LAPTOP" != "" ]; then

	exit 0

fi


# check the time; exit if it's between 5 am and 7 pm

current_hour=`/bin/date +%H`

if [ $current_hour -gt 5 -a $current_hour -lt 19 ]; then

	exit 0

fi


# now check idle time;

# exit if we've been idle less than 20 minutes

idleTime=`ioreg -c IOHIDSystem | perl -ane 'if (/Idle/) {$idle=int((pop @F)/1000000000); print $idle,"/n"; last}'`

if [ $idleTime -lt 1200 ]; then

	exit 0

fi


# tell Power Manager to wake us up or turn us on at 6am M-F

pmset repeat wakeorpoweron MTWRF 06:00:00


# check to see if a user's logged into the console

login_status=`/usr/bin/who | /usr/bin/awk '{ print $2 }'`

for i in $login_status; do

  if [ $i = "console" ]; then

       # someone's logged in, sleep

       osascript -e 'tell application "System Events" to sleep'

       exit 0

  fi

done


# if we got this far, it's OK to shut down.

/sbin/shutdown -h now

exit 0