问题描述
我正在尝试运行使用本地 Linux 逻辑路径的命令,例如 cat $test_dir/test.dat
,但逻辑路径 $test_dir
(这是一个用户环境变量)不能通过 ChannelExec
获得.但是当我使用交互式 ChannelShell
时,我能够看到用户变量并且命令在交互式会话中运行良好.我只能从exec"会话中查看系统级环境变量.甚至可以使用 JSch 库,如果是,那么我将如何实现它,如果不能,我应该使用什么库来实现它?
I am trying to run commands which uses local Linux logical paths like cat $test_dir/test.dat
, but the logical path $test_dir
(which is a user environment variable) is not available via ChannelExec
. But when I use interactive ChannelShell
, I am able to see the user variables and the commands run fine on the interactive session. I can view system level environment variable only from "exec" session. Is that even possible using JSch library, if yes then how shall I achieve it and if not what library shall I use to achieve this?
在下面添加我的课程代码:`公共类 SecureShell {
Adding my class code below:`public class SecureShell {
private static final Logger logger = LogManager.getLogger(SecureShell.class);
private String uName;
private String pWord;
private String hName;
private int port;
private Session session = null;
private Channel channel = null;
/**Create an instance to start and stop the remote shell and execute commands remotely via java.
*
* @param uName
* host username
* @param pWord
* host password
* @param hName
* host name
* @param port
* host port number
*/
public SecureShell(String uName, String pWord, String hName, int port) {
this.uName = uName;
this.pWord = pWord;
this.hName = hName;
this.port = port;
}
/**Create an instance to start and stop the remote shell and execute commands remotely via java.
*
*@param uName
* host username
* @param pWord
* host password
* @param hName
* host name
*/
public SecureShell(String uName, String pWord, String hName) {
this.uName = uName;
this.pWord = pWord;
this.hName = hName;
this.port = 22;
}
/**Start the session with the host.
* @return
* true if the session started successfully, false otherwise
*/
public boolean startSession() {
JSch jsch = new JSch();
try {
session = jsch.getSession(uName, hName, port);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.setPassword(pWord);
session.connect();
} catch (JSchException jsche) {
logger.error(jsche.getMessage());
return false;
}
return true;
}
/** Execute commands on the host;
* @param command
* command to be executed on the host.
* @return
* status of the execution
*/
public int execute(String command) {
int status = -1;
if(session != null && session.isConnected()) {
try {
channel = session.openChannel("exec");
//((ChannelExec)channel).setEnv("LC_XXX", "xxxxxxx");
((ChannelExec)channel).setPty(true);
((ChannelExec) channel).setCommand(command);
InputStream in = channel.getInputStream();
channel.connect();
byte[] buffer = new byte[1024];
while(true){
while(in.available()>0){
int i=in.read(buffer, 0, 1024);
System.out.print(new String(buffer, 0, i));
if(i<0)
break;
}
if(channel.isClosed()){
if(in.available()>0)
continue;
status = channel.getExitStatus();
break;
}
}
} catch (JSchException jsche) {
logger.error(jsche.getMessage());
} catch (IOException ioe) {
logger.error(ioe.getMessage());
} finally {
if(channel!=null && channel.isConnected())
channel.disconnect();
}
}
return status;
}
/**Stop the session with the remote.
*
*/
public void stopSession() {
if(session!=null && session.isConnected())
session.disconnect();
}
public static void main(String[] args) {
SecureShell ssh = new SecureShell("user", "password", "hostname");
ssh.startSession();
System.out.println(ssh.execute("env"));
ssh.stopSession();
}
}`
推荐答案
由于您没有打开交互式 shell,因此不会设置您的环境变量.但是,您可以使用带有 --login 的 bash 命令(man bash 了解更多详细信息)以获得您想要的结果
Since you're not opening up an interactive shell, your environment variables won't be set. However, you can use the bash command with --login (man bash for more details) to get the results you want
bash --login -c 'command arg1 ...'"
这篇关于JSch:有没有办法将用户环境变量暴露给“exec"?渠道?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!