Java和sudo命令执行

时间:2017-08-06 15:21:15

标签: java mysql linux ubuntu processbuilder

我正在使用ProcessBuilder和Runtime.exec对sudo调用命令进行挑战。我认为ProcessBuilder总体上是更好的解决方案,但两者都产生相同的结果 - 它们在Ubuntu上执行shell命令很好,但是如果我尝试执行sudo -i mysql命令,例如:

    public static void runProcess(String[] process) {
        String s = null;
        try { 
            Process p = new ProcessBuilder(process).start();
            BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
            BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
            while ((s = stdInput.readLine()) != null) { System.out.println(s); }
            while ((s = stdError.readLine()) != null) { System.out.println(s); }
        } catch (IOException e) { e.printStackTrace(); }
    }   

这两个命令有效:

        String[] cmdArgs0 = { "sudo", "echo", "Done" };
        runProcess(cmdArgs0);

        String[] cmdArgs1 = { "bash", usbDrivePath+"/ASWebUI/Install.sh" };
        runProcess(cmdArgs1);

但这不是:

        String[] cmdArgs2 = { "sudo", "-i", "mysqldump", "Core", ">", cachePath+"/SQLDumps/Core.sql" };
        runProcess(cmdArgs2);

错误:

mesg: ttyname failed: Inappropriate ioctl for device
mysqldump: Couldn't find table: ">"

1 个答案:

答案 0 :(得分:1)

ProcessBuilder不允许您使用>字符重定向输出。相反,您可以使用processBuilder.redirectOutput()方法指定所需的输出。

File dumpFile = new File("Core.sql");
processBuilder.redirectOutput(Redirect.to(dumpFile));

甚至使用mysqldump的--result-file选项来指定转储文件:

mysqldump [options] --result-file=dump.sql