如何用Java写入ssh的stdin？

Question

在命令行上一切正常,但是当我将我想要的内容翻译成Java时,接收过程永远不会在stdin上得到任何东西.

这就是我所拥有的:

private void deployWarFile(File warFile, String instanceId) throws IOException, InterruptedException {
    Runtime runtime = Runtime.getRuntime();
    // FIXME(nyap): Use Jsch.
    Process deployWarFile = runtime.exec(new String[]{
            "ssh",
            "gateway",
            "/path/to/count-the-bytes"});

    OutputStream deployWarFileStdin = deployWarFile.getOutputStream();
    InputStream deployWarFileStdout = new BufferedInputStream(deployWarFile.getInputStream());
    InputStream warFileInputStream = new FileInputStream(warFile);

    IOUtils.copy(warFileInputStream, deployWarFileStdin);
    IOUtils.copy(deployWarFileStdout, System.out);

    warFileInputStream.close();
    deployWarFileStdout.close();
    deployWarFileStdin.close();

    int status = deployWarFile.waitFor();
    System.out.println("************ Deployed with status " + status + " file handles. ************");
}

脚本'count-the-bytes'只是:

#!/bin/bash

echo "************ counting stdin bytes ************"
wc -c
echo "************ counted stdin bytes ************"

输出表明该函数在'wc -c'行挂起 - 它永远不会到达'count stdin bytes'行.

这是怎么回事？会用Jsch帮忙吗？

Answer 1

您可以在期望 wc -c 返回之前尝试关闭输出流。

IOUtils.copy(warFileInputStream, deployWarFileStdin);
deployWarFileStdin.close();
IOUtils.copy(deployWarFileStdout, System.out);

warFileInputStream.close();
deployWarFileStdout.close();