1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>2004</year><year>2016</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>Getting Started</title>
<p>FTP clients are considered to be rather temporary. Thus,
they are only started and stopped during runtime and cannot
be started at application startup.
The FTP client API is designed to allow some functions to
return intermediate results. This implies that only the process
that started the FTP client can access it with
preserved sane semantics.
If the process that started the FTP session
dies, the FTP client process terminates.</p>
<p>The client supports IPv6 as long as the underlying mechanisms
also do so.</p>
<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>:</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>
<p> 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>
</section>
</chapter>
|
