使用程式执行关机、重开机、登出指令
安装一些程式或更新程式后会要求你重新开机,这个动作是如何利用程式达到呢?目前已知的是在Console上面可以下指令。
- 重开机
sudo shutdown -r now
- 关机
sudo shutdown -t now
但这要root权限有麻烦烦,当然在OSX下还能使用程式传送事件的方式告诉系统你要的动作是重开机(Restart)、关机(Shutdown),这些之外还能告诉系统要你要登出(Logout)。
要执行这个功能过程有点覆杂,所以已经将功能整理成Function:SendAppleEventToSystemProcess
:
//-----------start----------- OSStatus SendAppleEventToSystemProcess(AEEventID EventToSend) { AEAddressDesc targetDesc; static const ProcessSerialNumber kPSNOfSystemProcess = { 0, kSystemProcess }; AppleEvent eventReply = {typeNull, NULL}; AppleEvent appleEventToSend = {typeNull, NULL}; OSStatus error = noErr; error = AECreateDesc(typeProcessSerialNumber, &kPSNOfSystemProcess, sizeof(kPSNOfSystemProcess), &targetDesc); if (error != noErr) { return(error); } error = AECreateAppleEvent(kCoreEventClass, EventToSend, &targetDesc, kAutoGenerateReturnID, kAnyTransactionID, &appleEventToSend); AEDisposeDesc(&targetDesc); if (error != noErr) { return(error); } error = AESend(&appleEventToSend, &eventReply, kAENoReply, kAENormalPriority, kAEDefaultTimeout, NULL, NULL); AEDisposeDesc(&appleEventToSend); if (error != noErr) { return(error); } AEDisposeDesc(&eventReply); return(error); } //------------end------------
目前能传送的AEEventID
:
- kAERestart 重开机
- kAEShutDown 关机
- kAEReallyLogOut 登出
- kAESleep 睡眠
- kAEShowShutdownDialog 显示是否要关机的对话框
- kAEShowRestartDialog 显示是否要重开机的对话框
程式范例提供能在Console下面测试的程式:
//-----------start----------- #include <stdio.h> #include <CoreServices/CoreServices.h> #include <Carbon/Carbon.h> static OSStatus SendAppleEventToSystemProcess(AEEventID EventToSend); int main(void) { const int bufferSize = 256; OSStatus error = noErr; char select [bufferSize]; printf("1: Restart computer\n"); printf("2: Shutdown computer\n"); printf("3: Logout computer\n"); printf("4: Sleep computer\n"); printf("5: ShowShutdownDialog\n"); printf("6: ShowRestartDialog\n"); printf("q: quit program\n"); printf("please enter choice:\n");fflush(stdout); fgets(select, bufferSize, stdin); switch (select[0]) { case '1': //sending restart event to system error = SendAppleEventToSystemProcess(kAERestart); if (error == noErr) {printf("Computer is going to restart!\n");} else {printf("Computer wouldn't restart\n");} break; case '2': //sending shutdown event to system error = SendAppleEventToSystemProcess(kAEShutDown); if (error == noErr) {printf("Computer is going to shutdown!\n");} else {printf("Computer wouldn't shutdown\n");} break; case '3': //sending logout event to system error = SendAppleEventToSystemProcess(kAEReallyLogOut); if (error == noErr) {printf("Computer is going to logout!\n");} else {printf("Computer wouldn't logout");} break; case '4': //sending sleep event to system error = SendAppleEventToSystemProcess(kAESleep); if (error == noErr) {printf("Computer is going to sleep!\n");} else {printf("Computer wouldn't sleep");} case '5': //kAEShowShutdownDialog error = SendAppleEventToSystemProcess(kAEShowShutdownDialog); if (error == noErr) {printf("Computer is going to ShowShutdownDialog!\n");} else {printf("Computer wouldn't ShowShutdownDialog");} case '6': //kAEShowShutdownDialog error = SendAppleEventToSystemProcess(kAEShowRestartDialog); if (error == noErr) {printf("Computer is going to ShowRestartDialog!\n");} else {printf("Computer wouldn't ShowRestartDialog");} }; return(0); } //------------end------------
执行画面会列出选项让你选择要执行哪个功能:
1: Restart computer 2: Shutdown computer 3: Logout computer 4: Sleep computer 5: ShowShutdownDialog q: quit program please enter choice: 5 Computer is going to ShowShutdownDialog! logout
上面例子我执行了选项5后会告知我选择了ShowShutdownDialog
,意指要显示关机的对话框询问是否要关机的讯息:
以上就是使用程式执行关机、重开机、登出指令。