避免电脑休眠
公司工作电脑会被域策略强制休眠，从而导致在家无法远程连接.因此需要一个脚本，保证机器处于运行状态.
防止计算机休眠有三种方法:
- 基于Windows API
- 基于电源计划
- 模拟键盘/鼠标
基于Windows API (SetThreadExecutionState)
MSDN解释：Enables an application to inform the system that it is in use, thereby preventing the system from entering sleep or turning off the display while the application is running.
它就是用来干防止电脑休眠和锁屏的。有5个可选参数：
- ES_AWAYMODE_REQUIRED
- ES_CONTINUOUS
- ES_DISPLAY_REQUIRED
- ES_SYSTEM_REQUIRED
- ES_USER_PRESENT
要保持电脑不休眠，使用ES_CONTINUOUS | ES_SYSTEM_REQUIRED 就可以了
下面是PowerShell的实现：
1 打印机器启动时间
2 使用c#包装WinAPI，以供PowerShell调用
3 注册C#代码
4 以一定时间间隔循环调用SetThreadExecutionState
# enable local ps execute => Set-ExecutionPolicy RemoteSigned
# another way is using power plan setting http://www.wintellect.com/blogs/jrobbins/setting-the-power-plan-with-powershell
# Last Booted Time
Get-WmiObject -Class Win32_OperatingSystem –ComputerName localhost | Select-Object -Property CSName,@{n=”Last Booted”;e={[Management.ManagementDateTimeConverter]::ToDateTime($_.LastBootUpTime)}}
# WinAPI wrapper
$script:nativeMethods = @();
function Register-NativeMethod([string]$dll, [string]$methodSignature)
{
$script:nativeMethods += [PSCustomObject]@{ Dll = $dll; Signature = $methodSignature; }
}
function Add-NativeMethods()
{
$nativeMethodsCode = $script:nativeMethods | % { "
[DllImport(`"$($_.Dll)`")]
public static extern $($_.Signature);
" }
Add-Type @"
using System;
using System.Runtime.InteropServices;
public static class SetThreadExecutionStateWrapper {
$nativeMethodsCode
}
"@
}
Register-NativeMethod "kernel32.dll" "uint SetThreadExecutionState(uint esFlags)"
Add-NativeMethods
function wakeUpOS() {
$executionValue = [SetThreadExecutionStateWrapper]::SetThreadExecutionState(0x00000000 -bor 0x00000001 -bor 0x00000002)
write-output $(Get-Date -format 'u')
}
while(1){
wakeUpOS
[System.Threading.Thread]::Sleep(5000)
}GitHub Source Code
下载
基于电源计划 (powercfg.exe)
利用powercfg.exe不停的执行设置电源计划，从而使计数清零并重新开始。
下面是Python的实现(感谢_吴鹏_同学的分享)：
1 通过powercfg.exe 设置电源计划
2 以一定时间间隔循环调用
#!/usr/bin/env python
#coding:utf-8
"""
Author: --<>
Purpose:
Created: 2014-03-03
MODIFIED: 2014-03-19
"""
import os
import time
import chardet
import re
import time
command = u'powercfg -setactive {GUID}'
cmd_list_guid = u'powercfg -list'
reg_str = u'GUID: (\w+-\w+-\w+-\w+-\w+) +\((.*?)\) ?(\*?)'
def _u(str_buf):
if not str_buf:
return str_buf
if type(str_buf) == str:
encoding = chardet.detect(str_buf)['encoding']
return str_buf.decode(encoding)
else:
return str_buf
def _u8(str_buf):
if not str_buf:
return str_buf
return _u(str_buf).encode('utf8')
def get_powercfg_guids():
rets = os.popen(cmd_list_guid).read()
rets = _u(rets)
guids = re.findall(reg_str, rets)
index = 0
all_guids = {}
for guid in guids:
all_guids[index] = list(guid)
index += 1
return all_guids
if __name__ == '__main__':
guids = get_powercfg_guids()
print u'Power Scheme List:'
for index in guids:
guid = guids[index]
print u'%2s: Name: %s\t %s' % (index, guid[1], u'(Active)' if guid[2] else u'')
print ''
index = -1
while index not in guids:
try:
index = int(raw_input(u'Choose the Scheme index number you want to keep:'))
except :
print u'Can I Hehe?'
power_cfg = guids[index]
while True:
try:
os.system(command.format(GUID=power_cfg[0]))
print u'%s : Current Power Scheme is %s (GUID:%s)' % \
(time.ctime(), power_cfg[1], power_cfg[0])
except Exception as ex:
print ex
time.sleep(60)