Android-交互式外壳程序（Runtime.getRuntime（）。exec（）） [英] Android - Interactive shell (Runtime.getRuntime().exec())
问题描述
如何在android上运行交互式shell？ （有根设备）
How to run an interactive shell on android? (rooted device)
我需要执行以下步骤：
1-执行shell进程（onCreate）
1 - Execute shell process (onCreate)
Process p = Runtime.getRuntime().exec(String[]{"su","-c","sh"});
2-获取输出（onCreate）
2 - Get the output (onCreate)
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream));
//dos is a field (a class attribute)
dos = new DataOutputStream(p.getOutputStream());
new Thread(new Runnable() {
@Override
public void run() {
String l;
//wait the console output and write it
while((l = br.readLine()) != null) {
Log.v("info", l);
}
}
}).start();
3-执行命令（按钮-> onClick（））
3 - Execute a command (Button -> onClick())
cmd("wpa_cli");
cmd方法为：
public void cmd(String cmd) {
dos.writeBytes(cmd + "\n");
dos.flush();
}
日志从不显示控制台输出。
The Log never shows the console output.
下一步：
4-获取wpa_cli子命令的输出（另一个Button-> onClick（））
4 - Get the output of a subcommand of wpa_cli (another Button -> onClick())
cmd("help");
应显示wpa_cli帮助，但不起作用。
如果我多次按下按钮会出现不完整的输出（帮助）
Should show the wpa_cli help but it doesn't work.
If i press the button many times appears incomplete output (help)
创建活动并使其保持活动状态以进行交互的正确方法是什么？
What is the correct way to initialize a process when the Activity is creating and keep it active to interact?
谢谢。
PostData
我替换行 Log .v（ info，l）;
和
PostData
I replaced the line Log.v("info", l);
with
fos.write(l);
Message msg = handlerTest.obtainMessage();
msg.obj = l;
handlerTest.sendMessage(msg);
fos-> FileOutputStream对象
fos -> FileOutputStream object
Handler handlerTest = new Handler() {
@Override
handleMessage(Message msg) {
if (msg != null) {
//alert... (String)msg.obj;
}
}
};
仅显示直接命令的警报，如 help 。命令 status 仅在流关闭时有效。 （执行 cmd（ quit）; 和 cmd（ exit）; ）
And only displays the alert from the direct commands, as help for example. The command status only work when the stream is closed. (after execute cmd("quit"); and cmd("exit");)
我不明白。标准输出不止一个？我可以不关闭流而与输出交互吗？
I don't understand. stdout is more that one? I can interact with the output without close the stream?
使用 adb shell 我读取了输出文件（创建后
With adb shell i read the output file (created after closing the stream) and it's complete.
PostData2：
PostData2:
问题是缓冲区。在二进制文件（已执行）输出和Java进程之间，我可以不使用本机I / O禁用缓冲区吗？
Android终端仿真器可以很好地运行，它正在使用NIO吗？
The problem is the buffer. Between the binary file (executed) output and java process i can disable the buffer without using Native I/O? The Android Terminal Emulator works fine, it's using NIO?
推荐答案
OP解决方案。
不使用Android中（coreutils的） stdbuf 工具，我找到了下一个解决方案：
Without using the tool stdbuf (of coreutils) in Android I found the next solution:
我正在使用两个名为process1和process2的过程：两者-> new ProcessBuilder（new String [] { su， -c， sh }）。start（）;
I'm using two processes called process1 and process2: both -> new ProcessBuilder(new String[]{"su", "-c", "sh"}).start();
在第一个过程中，我运行 wpa_cli
In the first process I run wpa_cli
dos1.write("wpa_cli".getBytes());
dos1.flush();
在线程中，我等待5秒，然后在第二个进程中运行wpa_cli。
In a thread I wait 5 seconds and run wpa_cli in the second process.
dos2.write("wpa_cli".getBytes());
dos2.flush();
要从wpa_cli获取输出，必须在 quit处关闭
To get the output from wpa_cli is necessary to close it with quit
dos1.write("quit".getBytes());
dos1.flush();
同时使用这两个进程的主线程：
The main thread that work with both processes:
new Thread(new Runnable() {
@Override
public void run() {
boolean firstProcess = true;
while (follow) {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (follow) {
if (firstProcess) {
cmd("wpa_cli", dos2);
cmd("quit", dos1);
} else {
cmd("wpa_cli", dos1);
cmd("quit", dos2);
}
firstProcess = !firstProcess;
}
}
}
}).start();
重要：这两个过程都具有此功能（在创建过程时）：
Important: Both processes have this (when the process is created):
new Thread(new Runnable() {
@Override
public void run() {
BufferedReader br = new BufferedReader(new InputStreamReader(process1.getInputStream()));
String l;
try {
Message msg;
while ((l = br.readLine()) != null) {
msg = handlerStdout.obtainMessage();
msg.obj = l;
handlerStdout.sendMessage(msg);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
处理程序 handlerStdout 完成所需的工作。它每5秒接收一次 wpa_cli 的输出：输出交替来自process1和process2
The handler handlerStdout does the desired job. It receives the output of wpa_cli every 5 seconds: the output comes from process1 and process2 alternatively
另一种解决方案是为Android编译coreutils或 stdbuf 。或从 http://forum.xda-developers.com/showthread安装编译过的coreutils .php？t = 2613243 （对我来说， stdbuf 不起作用，因为未找到 libstdbuf.so ）
An alternative solution would be to compile coreutils or stdbuf for Android. Or install compiled coreutils from http://forum.xda-developers.com/showthread.php?t=2613243 (for me not work stdbuf because the libstdbuf.so not found)
使用 stdbuf -oL wpa_cli 不会缓冲输出（缓冲一行）。没有它，输出将被缓冲（4k）。
With stdbuf -oL wpa_cli the output isn't buffered (buffer one line). Without it the output is buffered (4k).
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