我正在使用 Jsch 在服务器中创建一个文件并执行一些命令。对于文件创建,它工作正常,但是,对于命令执行,则不然。它保持状态 -1(仍在处理它)并永远保持在那里。这发生在 shell 执行或当我尝试成为 root 时。按照下面使用的方法:
public void upload(String localPath) throws IOException {
Session session = connectToServer();
System.out.println("In upload");
ChannelSftp channelSftp = getChannelToSftpServer(session);
//Creating file in temporary location
File f = new File(localPath);
FileInputStream fi = new FileInputStream(f);
// Creating file on server and setting the permissions to the user (chmod 777)
if (channelSftp != null) {
try {
System.out.println("Change working in temp directory");
changeWorkingDirectory(channelSftp, TEMP_PATH);
ChannelExec channelExec = (ChannelExec) session.openChannel("exec");
//THE PROBLEM ALSO HAPPENS WHEN EXECUTING A SHELL WITH THIS COMMAND INSIDE
channelExec.setCommand(
"root command (using pbrun) <command is here, confidential> ");
InputStream commandOutput = channelExec.getInputStream();
channelExec.connect();
StringBuilder outputBuffer = new StringBuilder();
int readByte = commandOutput.read();
while(readByte != 0xffffffff)
{
outputBuffer.append((char)readByte);
readByte = commandOutput.read();
System.out.println(outputBuffer);
}
System.out.println("Root connected.");
channelExec.disconnect();
channelSftp.put(fi, f.getName());
channelSftp.chmod(0777, localPath);
channelSftp.chown(123, localPath);
channelSftp.chgrp(123, localPath);
System.out.println("File configurations changed.");
//Copying to the official path
channelExec = (ChannelExec) session.openChannel("exec");
channelExec.setCommand("mv /tmp/"+f.getName()+" "+path);
channelExec.connect();
System.out.println("File is completed and ready!");
while (channelExec.getExitStatus() == -1) {
Thread.sleep(1000);
}
channelExec.disconnect();
} catch (SftpException e) {
e.printStackTrace();
throw new IOException(e.getStackTrace() + "");
} catch (JSchException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
disconnectChanneltoSftpServer(channelSftp);
session.disconnect();
fi.close();
// Deletes the local File.
f.delete();
}
}
}
我究竟做错了什么?先感谢您。
你必须先打电话getInputStream()
再打电话connect()
。
实际上,您最好同时阅读 stderr 和 stdout 以获取错误信息。
为此,请参阅我对如何读取 JSch 命令输出的回答?
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