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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="wrappers.ssh2" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" annotations="verify_info:false" role="stream_wrapper">
<refnamediv>
<refname>ssh2://</refname>
<refpurpose>Secure Shell 2</refpurpose>
</refnamediv>
<refsect1 role="description"><!-- {{{ -->
&reftitle.description;
<para>
<filename>ssh2.shell://</filename>
<filename>ssh2.exec://</filename>
<filename>ssh2.tunnel://</filename>
<filename>ssh2.sftp://</filename>
<filename>ssh2.scp://</filename>
(PECL)
</para>
<note>
<title>This wrapper is not enabled by default</title>
<simpara>
In order to use the <filename>ssh2.*://</filename> wrappers,
the
<link xlink:href="&url.pecl.package;ssh2">SSH2</link>
extension available from &link.pecl; must be installed.
</simpara>
</note>
<simpara>
In addition to accepting traditional URI login details, the ssh2 wrappers
will also reuse open connections by passing the connection resource in the
host portion of the URL.
</simpara>
</refsect1><!-- }}} -->
<refsect1 role="usage"> <!-- {{{ -->
&reftitle.usage;
<itemizedlist>
<listitem><simpara><filename>ssh2.shell://user:pass@example.com:22/xterm</filename></simpara></listitem>
<listitem><simpara><filename>ssh2.exec://user:pass@example.com:22/usr/local/bin/somecmd</filename></simpara></listitem>
<listitem><simpara><filename>ssh2.tunnel://user:pass@example.com:22/192.168.0.1:14</filename></simpara></listitem>
<listitem><simpara><filename>ssh2.sftp://user:pass@example.com:22/path/to/filename</filename></simpara></listitem>
</itemizedlist>
</refsect1> <!-- }}} -->
<refsect1 role="options"><!-- {{{ -->
&reftitle.options;
<para>
<table>
<title>Wrapper Summary</title>
<tgroup cols="6">
<thead>
<row>
<entry>Attribute</entry>
<entry>ssh2.shell</entry>
<entry>ssh2.exec</entry>
<entry>ssh2.tunnel</entry>
<entry>ssh2.sftp</entry>
<entry>ssh2.scp</entry>
</row>
</thead>
<tbody>
<row>
<entry>Restricted by <link linkend="ini.allow-url-fopen">allow_url_fopen</link></entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
</row>
<row>
<entry>Allows Reading</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
</row>
<row>
<entry>Allows Writing</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>Allows Appending</entry>
<entry>No</entry>
<entry>No</entry>
<entry>No</entry>
<entry>Yes (When supported by server)</entry>
<entry>No</entry>
</row>
<row>
<entry>Allows Simultaneous Reading and Writing</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>Supports <function>stat</function></entry>
<entry>No</entry>
<entry>No</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>Supports <function>unlink</function></entry>
<entry>No</entry>
<entry>No</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>Supports <function>rename</function></entry>
<entry>No</entry>
<entry>No</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>Supports <function>mkdir</function></entry>
<entry>No</entry>
<entry>No</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
<row>
<entry>Supports <function>rmdir</function></entry>
<entry>No</entry>
<entry>No</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry>No</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
<!-- FIXME: This should be context.ssh2!!! -->
<para>
<table>
<title>Context options</title>
<tgroup cols="3">
<thead>
<row>
<entry>Name</entry>
<entry>Usage</entry>
<entry>Default</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>session</literal></entry>
<entry>Preconnected ssh2 resource to be reused</entry>
<entry/>
</row>
<row>
<entry><literal>sftp</literal></entry>
<entry>Preallocated sftp resource to be reused</entry>
<entry/>
</row>
<row>
<entry><literal>methods</literal></entry>
<entry>Key exchange, hostkey, cipher, compression, and MAC methods to use</entry>
<entry/>
</row>
<row>
<entry><literal>callbacks</literal></entry>
<entry></entry>
<entry></entry>
</row>
<row>
<entry><literal>username</literal></entry>
<entry>Username to connect as</entry>
<entry></entry>
</row>
<row>
<entry><literal>password</literal></entry>
<entry>Password to use with password authentication</entry>
<entry></entry>
</row>
<row>
<entry><literal>pubkey_file</literal></entry>
<entry>Name of public key file to use for authentication</entry>
<entry></entry>
</row>
<row>
<entry><literal>privkey_file</literal></entry>
<entry>Name of private key file to use for authentication</entry>
<entry></entry>
</row>
<row>
<entry><literal>env</literal></entry>
<entry>Associate array of environment variables to set</entry>
<entry></entry>
</row>
<row>
<entry><literal>term</literal></entry>
<entry>Terminal emulation type to request when allocating a pty</entry>
<entry></entry>
</row>
<row>
<entry><literal>term_width</literal></entry>
<entry>Width of terminal requested when allocating a pty</entry>
<entry></entry>
</row>
<row>
<entry><literal>term_height</literal></entry>
<entry>Height of terminal requested when allocating a pty</entry>
<entry></entry>
</row>
<row>
<entry><literal>term_units</literal></entry>
<entry>Units to use with term_width and term_height</entry>
<entry><constant>SSH2_TERM_UNIT_CHARS</constant></entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</refsect1> <!-- }}} -->
<refsect1 role="examples"><!-- {{{ -->
&reftitle.examples;
<example>
<title>Opening a stream from an active connection</title>
<programlisting role="php">
<![CDATA[
<?php
$session = ssh2_connect('example.com', 22);
ssh2_auth_pubkey_file($session, 'username', '/home/username/.ssh/id_rsa.pub',
'/home/username/.ssh/id_rsa', 'secret');
$stream = fopen("ssh2.tunnel://$session/remote.example.com:1234", 'r');
?>
]]>
</programlisting>
</example>
<example>
<title>This <varname>$session</varname> variable must be kept available!</title>
<simpara>
In order to use the <filename>ssh2.*://$session</filename> wrappers,
the <varname>$session</varname> resource variable must be kept.
The code below will not have the desired effect:
</simpara>
<programlisting role="php">
<![CDATA[
<?php
$session = ssh2_connect('example.com', 22);
ssh2_auth_pubkey_file($session, 'username', '/home/username/.ssh/id_rsa.pub',
'/home/username/.ssh/id_rsa', 'secret');
$connection_string = "ssh2.sftp://$session/";
unset($session);
$stream = fopen($connection_string . "path/to/file", 'r');
?>
]]>
</programlisting>
<simpara>
unset() closes the session, because <varname>$connection_string</varname> does not
hold a reference to the <varname>$session</varname> variable, just a string cast
derived from it. This also happens when the <function>unset</function> is implicit
because of leaving scope (like in a function).
</simpara>
</example>
</refsect1><!-- }}} -->
</refentry>
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