如何用Java编写ssh的stdin? [英] How to write in Java to stdin of ssh?
本文介绍了如何用Java编写ssh的stdin?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
一切在命令行上都可以正常工作,但是当我将所需内容转换为Java时,接收过程将永远不会在stdin上得到任何东西.
Everything works fine on the command line, but when I translate what I want into Java, the receiving process never gets anything on stdin.
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. ************");
}
脚本字节计数"很简单:
The script 'count-the-bytes' is simply:
#!/bin/bash
echo "************ counting stdin bytes ************"
wc -c
echo "************ counted stdin bytes ************"
输出表明该函数挂在'wc -c'行-永远不会到达'counted stdin bytes'行.
The output indicates that the function hangs at the 'wc -c' line -- it never gets to the 'counted stdin bytes' line.
这是怎么回事?使用Jsch会有所帮助吗?
What's going on? Would using Jsch help?
推荐答案
在期望wc -c返回之前,您可以尝试关闭输出流.
You might try closing the output stream before you expect wc -c to return.
IOUtils.copy(warFileInputStream, deployWarFileStdin);
deployWarFileStdin.close();
IOUtils.copy(deployWarFileStdout, System.out);
warFileInputStream.close();
deployWarFileStdout.close();
这篇关于如何用Java编写ssh的stdin?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文