youys
/
ant

<!DOCTYPE html>
<!--
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       https://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
-->
<html lang="en">

<head>
<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
<title>SSHEXEC Task</title>
</head>

<body>

<h2 id="sshexec">SSHEXEC</h2>
<p><em>Since Apache Ant 1.6</em></p>
<h3>Description</h3>

<p>Runs a command on a remote machine running SSH daemon.</p>

<p><strong>Note</strong>: This task depends on external libraries not included in the Ant
distribution.  See <a href="../install.html#librarydependencies">Library Dependencies</a> for more
information.  This task has been tested with JSCh 0.1.29 and above and won't work with versions of
JSCh earlier than 0.1.28.</p>

<p>See also the <a href="scp.html">scp task</a></p>

<h3>Parameters</h3>
<table class="attr">
  <tr>
    <th scope="col">Attribute</th>
    <th scope="col">Description</th>
    <th scope="col">Required</th>
  </tr>
  <tr>
    <td>host</td>
    <td>The hostname or IP address of the remote host to which you wish to connect.</td>
    <td>Yes</td>
  </tr>
  <tr>
    <td>username</td>
    <td>The username on the remote host to which you are connecting.</td>
    <td>Yes</td>
  </tr>
  <tr>
    <td>command</td>
    <td>The command to run on the remote host.</td>
    <td rowspan="2">Exactly one of the two</td>
  </tr>
  <tr>
    <td>commandResource</td>
    <td class="left">The resource (file) that contains the commands to run on the remote
    host.  <em>Since Ant 1.7.1</em></td>
  </tr>
  <tr>
    <td>port</td>
    <td>The port to connect to on the remote host.</td>
    <td>No; defaults to <q>22</q></td>
  </tr>
  <tr>
    <td>trust</td>
    <td>This trusts all unknown hosts if set to <q>yes</q>
      or <q>true</q>.<br/><strong>Note</strong>: If you set this to <q>false</q> (the default), the
      host you connect to must be listed in your <var>knownhosts</var> file, this also implies that
      the file exists.</td>
    <td>No; defaults to <q>no</q></td>
  </tr>
  <tr>
    <td>knownhosts</td>
    <td>This sets the known hosts file to use to validate the identity of the remote host.  This
      must be a SSH2 format file.  SSH1 format is not supported.</td>
    <td>No; defaults to <q>${user.home}/.ssh/known_hosts</q></td>
  </tr>
  <tr>
    <td>failonerror</td>
    <td>Whether to halt the build if the command does not complete successfully.</td>
    <td>No; defaults to <q>true</q></td>
  </tr>
  <tr>
    <td>password</td>
    <td>The password.</td>
    <td>Yes, unless you are using key based authentication or the password has been given in the
      file or <var>todir</var> attribute.</td>
  </tr>
  <tr>
    <td>keyfile</td>
    <td>Location of the file holding the private key.</td>
    <td>Yes, if you are using key based authentication</td>
  </tr>
  <tr>
    <td>passphrase</td>
    <td>Passphrase for your private key.</td>
    <td>No; defaults to an empty string</td>
  </tr>
  <tr>
    <td>sshConfig</td>
    <td>Location of the file holding the OpenSSH style configuration (e.g. <code>${user.home}/.ssh/config</code>).
        The username and the key file are read from the configuration file,
        unless they are already specified in the task parameters.
        <em>since Ant 1.10.8</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>suppresssystemout</td>
    <td>Whether to suppress system out. <em>since Ant 1.9.0</em></td>
    <td>No; defaults to <q>false</q></td>
  </tr>
  <tr>
    <td>suppresssystemerr</td>
    <td>Whether to suppress <code>System.err</code>. <em>since Ant 1.9.4</em></td>
    <td>No; defaults to <q>false</q></td>
  </tr>
  <tr>
    <td>output</td>
    <td>Name of a file to which to write the output.</td>
    <td>No</td>
  </tr>
  <tr>
    <td>errorOutput</td>
    <td>The file to which the standard error of the command should be redirected.  <em>since Ant
      1.9.4</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>append</td>
    <td>Whether <var>output</var> file should be appended to or overwritten.</td>
    <td>No; defaults to <q>false</q>, meaning overwrite any existing file</td>
  </tr>
  <tr>
    <td>errAppend</td>
    <td>Whether <var>errorOutput</var> file should be appended to or overwritten. <em>since Ant
      1.9.4</em></td>
    <td>No; defaults to <q>false</q>, meaning overwrite any existing file</td>
  </tr>
  <tr>
    <td>outputproperty</td>
    <td>The name of a property in which the output of the command should be stored.  If you use
      the <var>commandResource</var> attribute, each command's output will be prefixed by the
      command itself.</td>
    <td>No</td>
  </tr>
  <tr>
    <td>errorproperty</td>
    <td>The name of a property in which the standard error of the command should be
      stored.  <em>since Ant 1.9.4</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>resultproperty</td>
    <td>the name of a property in which the return code of the command should be stored. Only of
      interest if <var>failonerror</var>=<q>false</q>.  <em>since Ant 1.9.4</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>timeout</td>
    <td>Stop the command if it doesn't finish within the specified time (given in
      milliseconds <strong>unlike <code>telnet</code>, which expects a timeout in
      seconds</strong>).</td>
    <td>No; defaults to <q>0</q> which means <q>never</q></td>
  </tr>
  <tr>
    <td>input</td>
    <td>A file from which the executed command's standard input is taken. This attribute is mutually
      exclusive with the <var>inputstring</var> and <var>inputproperty</var> attributes.<br/>  When
      executing more than one command via <var>commandResource</var>, input will be read for each
      command.  <em>since Ant 1.8.0</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>verbose</td>
    <td>Determines whether <code>sshexec</code> outputs verbosely to the user.<br/>  Similar output
      is generated as the <kbd>ssh</kbd> command line tool with the <kbd>-v</kbd>
      option.  <em>since Ant 1.8.0</em></td>
    <td>No; defaults to <q>false</q></td>
  </tr>
  <tr>
    <td>inputproperty</td>
    <td>Name of a property content of which serves as the input stream for the executed
      command. This attribute is mutually exclusive with the <var>input</var>
      and <var>inputstring</var> attributes.<br/>  When executing more than one command
      via <var>commandResource</var>, input will be read for each command.  <em>since Ant
      1.8.0</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>inputstring</td>
    <td>A string which serves as the input stream for the executed command. This attribute is
      mutually exclusive with the <var>input</var> and <var>inputproperty</var> attributes.<br/>
      When executing more than one command via <var>commandResource</var>, input will be read for
      each command.  <em>since Ant 1.8.3</em></td>
    <td>No</td>
  </tr>
  <tr>
    <td>usepty</td>
    <td>Whether to allocate a pseudo-tty (like <kbd>ssh -t</kbd>).  <em>since Ant 1.8.3</em></td>
    <td>No; defaults to <q>false</q></td>
  </tr>
  <tr>
    <td>useSystemIn</td>
    <td>Whether to pass the current standard input to the remote process.  <em>since Ant
      1.9.4</em></td>
    <td>No; defaults to <q>false</q></td>
  </tr>
  <tr>
    <td>serverAliveIntervalSeconds</td>
    <td>Sets a timeout interval in seconds after which if no data has been received from the server,
      the task will send a message through the encrypted channel to request a response from the
      server.  <em>since Ant 1.9.7</em></td>
    <td>No, the default is <q>0</q>, indicating that these messages will not be sent to the
      server</td>
  </tr>
  <tr>
    <td>serverAliveCountMax</td>
    <td>The number of server alive messages which may be sent without receiving any messages back
      from the server. Only used if <var>serverAliveIntervalSeconds</var> is
      not <q>0</q>.  <em>since Ant 1.9.7</em></td>
    <td>No; defaults to <q>3</q></td>
  </tr>
</table>

<h3>Parameters specified as nested elements</h3>

<h4 id="additionalConfig">additionalConfig</h4>

<p><em>since Ant 1.10.10</em></p>

<p>Adds configuration settings for the JSch Session created that are
  not directly supported by specific Ant attributes.</p>

<table class="attr">
  <tr>
    <th scope="col">Attribute</th>
    <th scope="col">Description</th>
    <th scope="col">Required</th>
  </tr>
  <tr>
    <td>key</td>
    <td>The key of the configuration setting.</td>
    <td>Yes</td>
  </tr>
  <tr>
    <td>value</td>
    <td>The value of the configuration setting.</td>
    <td>Yes</td>
  </tr>
</table>

<h3>Examples</h3>

<p>Run a command on a remote machine using password authentication</p>

<pre>
&lt;sshexec host=&quot;somehost&quot;
         username=&quot;dude&quot;
         password=&quot;yo&quot;
         command=&quot;touch somefile&quot;/&gt;</pre>

<p>Run a command on a remote machine using key authentication</p>

<pre>
&lt;sshexec host=&quot;somehost&quot;
         username=&quot;dude&quot;
         keyfile=&quot;${user.home}/.ssh/id_dsa&quot;
         passphrase=&quot;yo its a secret&quot;
         command=&quot;touch somefile&quot;/&gt;</pre>

<p>Run a command on a remote machine using key authentication with no passphrase</p>

<pre>
&lt;sshexec host=&quot;somehost&quot;
         username=&quot;dude&quot;
         keyfile=&quot;${user.home}/.ssh/id_dsa&quot;
         command=&quot;touch somefile&quot;/&gt;</pre>

<p>Run a set of commands from a command resource (file) on a remote machine using key authentication
with no passphrase</p>

<pre>
&lt;sshexec host=&quot;somehost&quot;
         username=&quot;dude&quot;
         keyfile=&quot;${user.home}/.ssh/id_dsa&quot;
         commandResource=&quot;to_run&quot;/&gt;</pre>

<p><strong>Security Note</strong>: Hardcoding passwords and/or usernames in <var>sshexec</var> task
can be a serious security hole. Consider using variable substitution and include the password on the
command line. For example:</p>

<pre>
&lt;sshexec host=&quot;somehost&quot;
         username=&quot;${username}&quot;
         password=&quot;${password}&quot;
         command=&quot;touch somefile&quot;/&gt;</pre>

<p>Invoking Ant with the following command line:</p>
<pre class="input">ant -Dusername=me -Dpassword=mypassword target1 target2</pre>
<p>is slightly better, but the username/password is exposed to all users on an Unix system (via
the <kbd>ps</kbd> command). The best approach is to use the <code>&lt;input&gt;</code> task and/or
retrieve the password from a (secured) <samp>.properties</samp> file.</p>
</body>
</html>