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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>2004</year><year>2013</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
Licensed 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
http://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.
</legalnotice>
<title>FTP Client</title>
<prepared>Ingela Anderton Andin</prepared>
<responsible></responsible>
<docno></docno>
<approved></approved>
<checked></checked>
<date></date>
<rev></rev>
<file>ftp_client.xml</file>
</header>
<section>
<title>Introduction</title>
<p>Ftp clients are consider to be rather temporary and are
for that reason only started and stopped during
runtime and can not be started at application startup.
Due to the design of FTP client API, letting some
functions return intermediate results, only the process
that started the ftp client will be able to access it in
order to preserve sane semantics. (This could be solved
by changing the API and using the concept of a controlling
process more in line with other OTP applications, but
that is perhaps something for the future.)
If the process that started the ftp session
dies the ftp client process will terminate.</p>
<p>The client supports ipv6 as long as the underlying mechanisms
also do so. </p>
</section>
<section>
<title>Using the FTP Client API</title>
<p>The following is a simple example of an ftp session, where
the user <c>guest</c> with password <c>password</c> logs on to
the remote host <c>erlang.org</c>, and where the file
<c>appl.erl</c> is transferred from the remote to the local
host. When the session is opened, the current directory at
the remote host is <c>/home/guest</c>, and <c>/home/fred</c>
at the local host. Before transferring the file, the current
local directory is changed to <c>/home/eproj/examples</c>, and
the remote directory is set to
<c>/home/guest/appl/examples</c>.</p>
<code type="erl"><![CDATA[
1> inets:start().
ok
2> {ok, Pid} = inets:start(ftpc, [{host, "erlang.org"}]).
{ok,<0.22.0>}
3> ftp:user(Pid, "guest", "password").
ok
4> ftp:pwd(Pid).
{ok, "/home/guest"}
5> ftp:cd(Pid, "appl/examples").
ok
6> ftp:lpwd(Pid).
{ok, "/home/fred"}.
7> ftp:lcd(Pid, "/home/eproj/examples").
ok
8> ftp:recv(Pid, "appl.erl").
ok
9> inets:stop(ftpc, Pid).
ok
]]></code>
</section>
</chapter>
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