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I have created a pre-login agent which uses CGEventPost for simulating keyboard. FYI I am developing a remote control app similar to teamviewer.

Keyboard

CGEventRef keyEvent = CGEventCreateKeyboardEvent( NULL, keyCode, down ) ;
CGEventPost( kCGHIDEventTap, keyEvent ) ;
CFRelease( keyEvent ) ;

Mouse

CGEventRef event = CGEventCreateMouseEvent(eventSource, eventType, mouseLocation, mouseButton );
CGEventPost(kCGHIDEventTap, event);
CFRelease(event);

Pre-login launch agent

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>Label</key>
        <string>my app label</string>
        <key>LimitLoadToSessionType</key>
        <string>LoginWindow</string>
        <key>RunAtLoad</key>
        <true/>
        <key>WorkingDirectory</key>
        <string>My app directory</string>
        <key>ProgramArguments</key>
        <array>
                <string>app absolute path</string>
                <string>service</string>
                <string>myservice</string>
        </array>
        <key>KeepAlive</key>
        <true/>
</dict>
</plist>

CGEventPost is not working, I get the following in the Console logs after login

Untrusted apps are not allowed to connect to
Window Server before login.

I have searched o chromium's remote control (which has keyboard and mouse simulation working) source code. They use CGEventPost for keyboard, but it works in login window.

https://cs.chromium.org/chromium/src/remoting/host/input_injector_mac.cc?rcl=0&l=42

They seem to use a sh file in privileged helper tools directory and use to to load the service, I tried putting our service in privileged helpers tool, but still the event handling fails.

The Deprecated API CGPostMouseEvent, CGPostKeyBoardEvent work without problem , but would really like to know how non deprecated keyboard API works in chromium.

4

1 回答 1

10

您应该将未记录的（经典的 apple ，通过默默无闻的安全性）添加到二进制部分，以使 CGEventPost 在 LoginWindow 上下文中运行时神奇地工作。

如果您使用 gcc，请将以下内容添加到编译标志

gcc <YOUR SOURCES AND FLAGS> -sectcreate CGPreLoginApp __CGPreLoginApp /dev/null

如果您使用的是 XCode，请将以下内容添加到项目的 Build 设置中的 Other Linker 标志中：

"-sectcreate"
__CGPreLoginApp
__cgpreloginapp
/dev/null

请参阅https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-700/IOHIDFamily.xcodeproj/project.pbxproj项目文件以获取 LDFLAGS

于 2017-01-12T07:31:46.483 回答