Andorid利用sserver/runtime实现java执行linux程序或脚本

方案一：利用sserver

external/server_mount/socket_server.c

#define THE_PORT 8090

方案二：利用runtime

Runtime runtime = Runtime.getRuntime();

Process process = runtime.exec(cmd);

下面介绍可以独立与Android的方案一：

1.sserver部分可以移植出Android部分代码

socket_server.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
 
#define THE_PORT 8090
#define CLIENT_NUM 10
#define BUFFSZ 1024

int main()
{
	int socketfd;
	int clientfd;
	char buff[BUFFSZ];
	struct sockaddr_in sa;
	struct sockaddr_in cliAdd;
	
	socketfd = socket(AF_INET, SOCK_STREAM, 0);
	
	if(socketfd == -1)
	{
		printf("socket create error\n");
		exit(1);
	}
	
	bzero(&sa, sizeof(sa));
	
	sa.sin_family = AF_INET;
	sa.sin_port = htons(THE_PORT);
	sa.sin_addr.s_addr = htons(INADDR_ANY);
	
	bzero(&(sa.sin_zero), 8);
	if(bind(socketfd, (struct sockaddr *)&sa, sizeof(sa))!= 0)
	{
		printf("bind failed\n");
		exit(1);
	}
	
	if(listen(socketfd ,CLIENT_NUM) != 0)
	{
		printf("listen error\n");
		exit(1);
	}
	else
	{
		printf("listening\n");
	}
	socklen_t len = sizeof(cliAdd);

	int closing =0;
	
	while( closing == 0 && (clientfd = accept(socketfd, (struct sockaddr *)&cliAdd, &len)) >0 )
	{
		int n;
		while((n = recv(clientfd,buff, BUFFSZ-1,0 )) > 0)
		{
			printf("received data = %s\n",buff);
			printf("received bytes = %d\n", n);
			buff[n] = '\0';
			proc_cmd(clientfd , buff);
			if(strcmp(buff, "quit") == 0)
			{
				//connection close
				break;
			}
			else if(strcmp(buff, "close") == 0)
			{
				//server close
				closing = 1;
				printf("server is closing\n");
				break;
			}
		}
		close(clientfd);
	}
	close(socketfd);
	return 0;
}
void proc_cmd(int sockfd,char buf[])
{
		char cmdbuf[BUFFSZ];
		char fpath[64] = "/data/mtinfo";
		FILE *fp;
		printf("proc_cmd now\n");
		sprintf(cmdbuf,"%s 2> %s",buf,fpath);
		
		if(-1 == system(cmdbuf))
		{
			printf("system call failed\n");
			exit(1);
		}
		if((fp = fopen(fpath,"r")) == -1)
		{
			printf("open file %s failed\n",fpath);
			exit(1);
		}
		if(!fgets(cmdbuf,sizeof(buf),fp))//cmd successed
		{
		   printf("----->cmd successed\n");
		   if(send(sockfd,"ok",2,0)<0)
		   {
			perror("send error");
			exit(1);
		   }		
		}
		else//fail
		{
			printf("----->cmd fail\n");
			if(send(sockfd,"fail",4,0)<0)
			{
				perror("send error");
				exit(1);	
			}		
		}
}

gcc socket_server.c -o server

2.java部分

HelloWorld.java

public class HelloWorld{
  public static void main(String args[]){
    System.out.println("Hello World!");
    RootSeeker.exec("ls");      
  }
}

RootSeeker.java

//package com.android.server.am.utils;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

//import android.util.Log;

public class RootSeeker {

	private static final String TAG = "RootSeeker";
	private static final int SOCKET_PORT = 8090;
	private static final String SOCKET_IP = "127.0.0.1";

	public static int exec(String cmd) {
		
		////Log.d(TAG, "<-----------------in exec() start --------------------->");
		//Log.d(TAG, "exec cmd: " + cmd);
		
		Socket socket;
		BufferedReader in;
		PrintWriter out;
		char []buf = new char[256];
		int ret = 0;
		
		try	{
			socket = new Socket(SOCKET_IP, SOCKET_PORT);
			in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
			out = new PrintWriter(socket.getOutputStream(),true);
			BufferedReader line = new BufferedReader(new InputStreamReader(System.in));
			out.println(cmd);
			if (in.read(buf) != -1 && new String(buf).equals(new String("ok")))
				ret = 0;
			else 
				ret = -1;
			
			//Log.d(TAG, "command execute " + ((ret == 0) ? "ok" : "false") + ", return: -->" +buf);
			
			line.close();
			out.close();
			in.close();
			socket.close();
			return 0;	//FIXME
		}
		catch (IOException e){
			//Log.d(TAG, e.toString());
		}
		return 0;
	}
	
	
	public static boolean chmod(String fileName) {
		String cmd = "chmod 777 " + fileName;
		System.out.println("cmd =" + cmd);
		try {
			Runtime runtime = Runtime.getRuntime();
			Process process = runtime.exec(cmd);
			return true;
		} catch (Exception e) {

			e.printStackTrace();
			return false;
		}
	}
	
}

javac RootSeeker.java HelloWorld.java

3.运行

一个终端执行./server

另一个终端执行

CLASSPATH=$CLASSPATH:.

echo $CLASSPATH

java HelloWorld

结果分别为：

listening
received data = ls

received bytes = 3
proc_cmd now
HelloWorld.class  HelloWorld.java  RootSeeker.class  RootSeeker.java  server  socket_server.c

Hello World!