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-rw-r--r--lib/ssh/doc/src/ssh_sftp.xml706
1 files changed, 371 insertions, 335 deletions
diff --git a/lib/ssh/doc/src/ssh_sftp.xml b/lib/ssh/doc/src/ssh_sftp.xml
index ab111562f9..4ed5a38de4 100644
--- a/lib/ssh/doc/src/ssh_sftp.xml
+++ b/lib/ssh/doc/src/ssh_sftp.xml
@@ -23,131 +23,171 @@
<title>ssh_sftp</title>
<prepared>OTP</prepared>
+ <docno></docno>
<date>2005-09-22</date>
+ <rev></rev>
<file>ssh_sftp.sgml</file>
</header>
<module>ssh_sftp</module>
<modulesummary>SFTP client.</modulesummary>
<description>
- <p>This module implements an SFTP (SSH FTP) client. SFTP is a
+ <p>This module implements an SSH FTP (SFTP) client. SFTP is a
secure, encrypted file transfer service available for
SSH.</p>
</description>
<section>
- <title>DATA TYPES </title>
- <p>Type definitions that are used more than once in this module
- and/or abstractions to indicate the intended use of the data type:
+ <title>DATA TYPES</title>
+ <p>Type definitions that are used more than once in this module,
+ or abstractions to indicate the intended use of the data type, or both:
</p>
- <p><c>ssh_connection_ref() - opaque to the user
- returned by ssh:connect/3</c></p>
- <p><c>timeout() = infinity | integer() - in milliseconds.</c></p>
+
+ <taglist>
+ <tag><c>ssh_connection_ref()</c></tag>
+ <item><p>Opaque to the user, returned by <c>ssh:connect/3</c></p></item>
+ <tag><c>timeout()</c></tag>
+ <item><p>= <c>infinity | integer() in milliseconds</c></p></item>
+ </taglist>
</section>
<section>
- <title>TIMEOUTS </title>
- <p>If the request functions for the SFTP channel return {error, timeout}
- it does not guarantee that the request did not reach the server and was
- not performed, it only means that we did not receive an answer from the
- server within the time that was expected.</p>
+ <title>Time-outs</title>
+ <p>If the request functions for the SFTP channel return <c>{error, timeout}</c>,
+ it does not guarantee that the request never reached the server and was
+ not performed. It only means that no answer was received from the
+ server within the expected time.</p>
</section>
<funcs>
+ <func>
+ <name>apread(ChannelPid, Handle, Position, Len) -> {async, N} | {error, Error}</name>
+ <v>ChannelPid = pid()</v>
+ <v>Handle = term()</v>
+ <v>Position = integer()</v>
+ <v>Len = integer()</v>
+ <v>N = term()</v>
+ <v>Reason = term()</v>
+
+ <desc><p>The <c><![CDATA[apread]]></c> function reads from a specified position,
+ combining the <c><![CDATA[position]]></c> and <c><![CDATA[aread]]></c> functions.</p>
+ <p><seealso marker="#apread-3">ssh_sftp:apread/3</seealso></p> </desc>
+ </func>
+
+ <func>
+ <name>aread(ChannelPid, Handle, Len) -> {async, N} | {error, Error}</name>
+ <fsummary>Reads asynchronously from an open file.</fsummary>
+ <type>
+ <v>ChannelPid = pid()</v>
+ <v>Handle = term()</v>
+ <v>Position = integer()</v>
+ <v>Len = integer()</v>
+ <v>N = term()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Reads from an open file, without waiting for the result. If the
+ handle is valid, the function returns <c><![CDATA[{async, N}]]></c>, where <c>N</c>
+ is a term guaranteed to be unique between calls of <c><![CDATA[aread]]></c>.
+ The actual data is sent as a message to the calling process. This
+ message has the form <c><![CDATA[{async_reply, N, Result}]]></c>, where
+ <c><![CDATA[Result]]></c> is the result from the read, either <c><![CDATA[{ok, Data}]]></c>,
+ <c><![CDATA[eof]]></c>, or <c><![CDATA[{error, Error}]]></c>.</p>
+ </desc>
+ </func>
+
<func>
- <name>start_channel(ConnectionRef) -> </name>
- <name>start_channel(ConnectionRef, Options) -> </name>
- <name>start_channel(Host, Options) -></name>
- <name>start_channel(Host, Port, Options) -> {ok, Pid} | {ok, Pid, ConnectionRef} |
- {error, Reason}</name>
- <fsummary>Starts a SFTP client</fsummary>
+ <name>apwrite(ChannelPid, Handle, Position, Data) -> ok | {error, Reason}</name>
+ <fsummary>Writes asynchronously to an open file.</fsummary>
<type>
- <v>Host = string()</v>
- <v>ConnectionRef = ssh_connection_ref()</v>
- <v>Port = integer()</v>
- <v>Options = [{Option, Value}]</v>
+ <v>ChannelPid = pid()</v>
+ <v>Handle = term()</v>
+ <v>Position = integer()</v>
+ <v>Len = integer()</v>
+ <v>Data = binary()</v>
+ <v>Timeout = timeout()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>If no connection reference is provided, a connection is set
- up and the new connection is returned. An SSH channel process
- is started to handle the communication with the SFTP server.
- The returned pid for this process should be used as input to
- all other API functions in this module.</p>
+ <p><c><![CDATA[apwrite]]></c> writes on a specified position, combining
+ the <c><![CDATA[position]]></c> and <c><![CDATA[awrite]]></c> operations.</p>
+ <p><seealso marker="#awrite-3">ssh_sftp:awrite/3</seealso> </p></desc>
+ </func>
- <p>Options are:</p>
- <taglist>
- <tag><c><![CDATA[{timeout, timeout()}]]></c></tag>
- <item>
- <p>The timeout is passed to the ssh_channel start function,
- and defaults to infinity.</p>
- </item>
- <tag>
- <p><c><![CDATA[{sftp_vsn, integer()}]]></c></p>
- </tag>
- <item>
- <p>
- Desired SFTP protocol version.
- The actual version will be the minimum of
- the desired version and the maximum supported
- versions by the SFTP server.
- </p>
- </item>
- </taglist>
- <p>All other options are directly passed to
- <seealso marker="ssh">ssh:connect/3</seealso> or ignored if a
- connection is already provided. </p>
+ <func>
+ <name>awrite(ChannelPid, Handle, Data) -> ok | {error, Reason}</name>
+ <fsummary>Writes asynchronously to an open file.</fsummary>
+ <type>
+ <v>ChannelPid = pid()</v>
+ <v>Handle = term()</v>
+ <v>Position = integer()</v>
+ <v>Len = integer()</v>
+ <v>Data = binary()</v>
+ <v>Timeout = timeout()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Writes to an open file, without waiting for the result. If the
+ handle is valid, the function returns <c><![CDATA[{async, N}]]></c>, where <c>N</c>
+ is a term guaranteed to be unique between calls of
+ <c><![CDATA[awrite]]></c>. The result of the <c><![CDATA[write]]></c> operation is sent
+ as a message to the calling process. This message has the form
+ <c><![CDATA[{async_reply, N, Result}]]></c>, where <c><![CDATA[Result]]></c> is the result
+ from the write, either <c><![CDATA[ok]]></c>, or <c><![CDATA[{error, Error}]]></c>.</p>
</desc>
</func>
<func>
- <name>stop_channel(ChannelPid) -> ok</name>
- <fsummary>Stops the SFTP client channel.</fsummary>
+ <name>close(ChannelPid, Handle) -></name>
+ <name>close(ChannelPid, Handle, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Closes an open handle.</fsummary>
<type>
<v>ChannelPid = pid()</v>
+ <v>Handle = term()</v>
+ <v>Timeout = timeout()</v>
+ <v>Reason = term()</v>
</type>
<desc>
- <p>Stops an SFTP channel. Does not close the SSH connetion.
- Use <seealso marker="ssh">ssh:close/1</seealso> to close it.</p>
+ <p>Closes a handle to an open file or directory on the server.</p>
</desc>
</func>
-
+
<func>
- <name>read_file(ChannelPid, File) -> </name>
- <name>read_file(ChannelPid, File, Timeout) -> {ok, Data} | {error, Reason}</name>
- <fsummary>Read a file</fsummary>
+ <name>delete(ChannelPid, Name) -></name>
+ <name>delete(ChannelPid, Name, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Deletes a file.</fsummary>
<type>
- <v>ChannelPid = pid()</v>
- <v>File = string()</v>
- <v>Data = binary()</v>
+ <v>ChannelPid = pid()</v>
+ <v>Name = string()</v>
<v>Timeout = timeout()</v>
- <v>Reason = term()</v>
+ <v>Reason = term()</v>
</type>
<desc>
- <p>Reads a file from the server, and returns the data in a binary,
- like <c><![CDATA[file:read_file/1]]></c>.</p>
+ <p>Deletes the file specified by <c><![CDATA[Name]]></c>, like
+ <seealso marker="file#delete-1">file:delete/1</seealso></p>
</desc>
</func>
+
<func>
- <name>write_file(ChannelPid, File, Iolist) -> </name>
- <name>write_file(ChannelPid, File, Iolist, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Write a file</fsummary>
+ <name>del_dir(ChannelPid, Name) -></name>
+ <name>del_dir(ChannelPid, Name, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Deletes an empty directory.</fsummary>
<type>
<v>ChannelPid = pid()</v>
- <v>File = string()</v>
- <v>Iolist = iolist()</v>
+ <v>Name = string()</v>
<v>Timeout = timeout()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Writes a file to the server, like
- <c><![CDATA[file:write_file/2]]></c>. The file is created if
- it does not exist or is owerwritten if it does.</p>
+ <p>Deletes a directory specified by <c><![CDATA[Name]]></c>.
+ The directory must be empty before it can be successfully deleted.
+ </p>
</desc>
</func>
- <func>
- <name>list_dir(ChannelPid, Path) -> </name>
+
+ <func>
+ <name>list_dir(ChannelPid, Path) -></name>
<name>list_dir(ChannelPid, Path, Timeout) -> {ok, Filenames} | {error, Reason}</name>
- <fsummary>List directory</fsummary>
+ <fsummary>Lists the directory.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Path = string()</v>
@@ -161,10 +201,45 @@
filenames as a list of strings.</p>
</desc>
</func>
+
+ <func>
+ <name>make_dir(ChannelPid, Name) -></name>
+ <name>make_dir(ChannelPid, Name, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Creates a directory.</fsummary>
+ <type>
+ <v>ChannelPid = pid()</v>
+ <v>Name = string()</v>
+ <v>Timeout = timeout()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Creates a directory specified by <c><![CDATA[Name]]></c>. <c><![CDATA[Name]]></c>
+ must be a full path to a new directory. The directory can only be
+ created in an existing directory.</p>
+ </desc>
+ </func>
+
<func>
- <name>open(ChannelPid, File, Mode) -> </name>
+ <name>make_symlink(ChannelPid, Name, Target) -></name>
+ <name>make_symlink(ChannelPid, Name, Target, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Creates a symbolic link.</fsummary>
+ <type>
+ <v>ChannelPid = pid()</v>
+ <v>Name = string()</v>
+ <v>Target = string()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc>
+ <p>Creates a symbolic link pointing to <c><![CDATA[Target]]></c> with the
+ name <c><![CDATA[Name]]></c>, like
+ <seealso marker="file#make_symlink-2">file:make_symlink/2</seealso></p>
+ </desc>
+ </func>
+
+ <func>
+ <name>open(ChannelPid, File, Mode) -></name>
<name>open(ChannelPid, File, Mode, Timeout) -> {ok, Handle} | {error, Reason}</name>
- <fsummary>Open a file and return a handle</fsummary>
+ <fsummary>Opens a file and returns a handle.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>File = string()</v>
@@ -175,14 +250,14 @@
<v>Reason = term()</v>
</type>
<desc>
- <p>Opens a file on the server, and returns a handle that
+ <p>Opens a file on the server and returns a handle, which
can be used for reading or writing.</p>
</desc>
</func>
<func>
- <name>opendir(ChannelPid, Path) -> </name>
+ <name>opendir(ChannelPid, Path) -></name>
<name>opendir(ChannelPid, Path, Timeout) -> {ok, Handle} | {error, Reason}</name>
- <fsummary>Open a directory and return a handle</fsummary>
+ <fsummary>Opens a directory and returns a handle.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Path = string()</v>
@@ -190,7 +265,7 @@
<v>Reason = term()</v>
</type>
<desc>
- <p>Opens a handle to a directory on the server, the handle
+ <p>Opens a handle to a directory on the server. The handle
can be used for reading directory contents.</p>
</desc>
</func>
@@ -198,14 +273,15 @@
<func>
<name>open_tar(ChannelPid, Path, Mode) -></name>
<name>open_tar(ChannelPid, Path, Mode, Timeout) -> {ok, Handle} | {error, Reason}</name>
- <fsummary>Opens a tar file on the server to which <v>ChannelPid</v> is connected and returns a handle</fsummary>
+ <fsummary>Opens a tar file on the server to which <c>ChannelPid</c>
+ is connected and returns a handle.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Path = string()</v>
- <v>Mode = [read] | [write] | [read,EncryptOpt] | [write,DecryptOpt] </v>
+ <v>Mode = [read] | [write] | [read,EncryptOpt] | [write,DecryptOpt]</v>
<v>EncryptOpt = {crypto,{InitFun,EncryptFun,CloseFun}}</v>
<v>DecryptOpt = {crypto,{InitFun,DecryptFun}}</v>
- <v>InitFun = (fun() -> {ok,CryptoState}) | (fun() -> {ok,CryptoState,ChunkSize}) </v>
+ <v>InitFun = (fun() -> {ok,CryptoState}) | (fun() -> {ok,CryptoState,ChunkSize})</v>
<v>CryptoState = any()</v>
<v>ChunkSize = undefined | pos_integer()</v>
<v>EncryptFun = (fun(PlainBin,CryptoState) -> EncryptResult)</v>
@@ -219,113 +295,86 @@
<v>Reason = term()</v>
</type>
<desc>
- <p>Opens a handle to a tar file on the server associated with <c>ChannelPid</c>. The handle
- can be used for remote tar creation and extraction as defined by the
- <seealso marker="stdlib:erl_tar#init/3">erl_tar:init/3</seealso> function.
+ <p>Opens a handle to a tar file on the server, associated with <c>ChannelPid</c>.
+ The handle can be used for remote tar creation and extraction, as defined by the
+ <seealso marker="stdlib:erl_tar#init-3">erl_tar:init/3</seealso> function.
</p>
- <p>An example of writing and then reading a tar file:</p>
- <code type="none">
- {ok,HandleWrite} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [write]),
- ok = erl_tar:add(HandleWrite, .... ),
- ok = erl_tar:add(HandleWrite, .... ),
- ...
- ok = erl_tar:add(HandleWrite, .... ),
- ok = erl_tar:close(HandleWrite),
-
- %% And for reading
- {ok,HandleRead} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [read]),
- {ok,NameValueList} = erl_tar:extract(HandleRead,[memory]),
- ok = erl_tar:close(HandleRead),
- </code>
-
- <p>The <c>crypto</c> mode option is applied to the generated stream of bytes just prior to sending
- them to the sftp server. This is intended for encryption but could of course be used for other
+
+ <p> For code exampel see Section
+ <seealso marker="using_ssh">SFTP Client with TAR Compression and Encryption</seealso> in
+ the ssh Users Guide. </p>
+
+ <p>The <c>crypto</c> mode option is applied to the generated stream of bytes prior to sending
+ them to the SFTP server. This is intended for encryption but can be used for other
purposes.
</p>
<p>The <c>InitFun</c> is applied once
- prior to any other crypto operation. The returned <c>CryptoState</c> is then folded into
- repeated applications of the <c>EncryptFun</c> or <c>DecryptFun</c>. The binary returned
- from those Funs are sent further to the remote sftp server. Finally - if doing encryption
- - the <c>CloseFun</c> is applied to the last piece of data. The <c>CloseFun</c> is
+ prior to any other <c>crypto</c> operation. The returned <c>CryptoState</c> is then folded into
+ repeated applications of the <c>EncryptFun</c> or <c>DecryptFun</c>. The binary returned
+ from those funs are sent further to the remote SFTP server. Finally, if doing encryption,
+ the <c>CloseFun</c> is applied to the last piece of data. The <c>CloseFun</c> is
responsible for padding (if needed) and encryption of that last piece.
</p>
<p>The <c>ChunkSize</c> defines the size of the <c>PlainBin</c>s that <c>EncodeFun</c> is applied
- to. If the <c>ChunkSize</c> is <c>undefined</c> the size of the <c>PlainBin</c>s varies because
- this is inteded for stream crypto while a fixed <c>ChunkSize</c> is intended for block crypto. It
- is possible to change the <c>ChunkSize</c>s in the return from the <c>EncryptFun</c> or
- <c>DecryptFun</c>. It is in fact possible to change the value between <c>pos_integer()</c> and
- <c>undefined</c>.
+ to. If the <c>ChunkSize</c> is <c>undefined</c>, the size of the <c>PlainBin</c>s varies,
+ because this is intended for stream crypto, whereas a fixed <c>ChunkSize</c> is intended for block crypto.
+ <c>ChunkSize</c>s can be changed in the return from the <c>EncryptFun</c> or
+ <c>DecryptFun</c>. The value can be changed between <c>pos_integer()</c> and <c>undefined</c>.
</p>
- <p>The write and read example above can be extended with encryption and decryption:</p>
- <code type="none">
- %% First three parameters depending on which crypto type we select:
- Key = &lt;&lt;"This is a 256 bit key. abcdefghi">>,
- Ivec0 = crypto:rand_bytes(16),
- DataSize = 1024, % DataSize rem 16 = 0 for aes_cbc
-
- %% Initialization of the CryptoState, in this case it is the Ivector.
- InitFun = fun() -> {ok, Ivec0, DataSize} end,
-
- %% How to encrypt:
- EncryptFun =
- fun(PlainBin,Ivec) ->
- EncryptedBin = crypto:block_encrypt(aes_cbc256, Key, Ivec, PlainBin),
- {ok, EncryptedBin, crypto:next_iv(aes_cbc,EncryptedBin)}
- end,
-
- %% What to do with the very last block:
- CloseFun =
- fun(PlainBin, Ivec) ->
- EncryptedBin = crypto:block_encrypt(aes_cbc256, Key, Ivec,
- pad(16,PlainBin) %% Last chunk
- ),
- {ok, EncryptedBin}
- end,
-
- Cw = {InitFun,EncryptFun,CloseFun},
- {ok,HandleWrite} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [write,{crypto,Cw}]),
- ok = erl_tar:add(HandleWrite, .... ),
- ok = erl_tar:add(HandleWrite, .... ),
- ...
- ok = erl_tar:add(HandleWrite, .... ),
- ok = erl_tar:close(HandleWrite),
-
- %% And for decryption (in this crypto example we could use the same InitFun
- %% as for encryption):
- DecryptFun =
- fun(EncryptedBin,Ivec) ->
- PlainBin = crypto:block_decrypt(aes_cbc256, Key, Ivec, EncryptedBin),
- {ok, PlainBin, crypto:next_iv(aes_cbc,EncryptedBin)}
- end,
-
- Cr = {InitFun,DecryptFun},
- {ok,HandleRead} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [read,{crypto,Cw}]),
- {ok,NameValueList} = erl_tar:extract(HandleRead,[memory]),
- ok = erl_tar:close(HandleRead),
- </code>
+
</desc>
</func>
<func>
- <name>close(ChannelPid, Handle) -> </name>
- <name>close(ChannelPid, Handle, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Close an open handle</fsummary>
+ <name>position(ChannelPid, Handle, Location) -></name>
+ <name>position(ChannelPid, Handle, Location, Timeout) -> {ok, NewPosition | {error, Error}</name>
+ <fsummary>Sets the file position of a file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Handle = term()</v>
+ <v>Location = Offset
+ | {bof, Offset} | {cur, Offset} | {eof, Offset} | bof | cur | eof</v>
+ <v>Offset = integer()</v>
<v>Timeout = timeout()</v>
+ <v>NewPosition = integer()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Closes a handle to an open file or directory on the server.</p>
+ <p>Sets the file position of the file referenced by <c><![CDATA[Handle]]></c>.
+ Returns <c><![CDATA[{ok, NewPosition}]]></c> (as an absolute offset) if
+ successful, otherwise <c><![CDATA[{error, Reason}]]></c>. <c><![CDATA[Location]]></c> is
+ one of the following:</p>
+ <taglist>
+ <tag><c><![CDATA[Offset]]></c></tag>
+ <item>
+ <p>The same as <c><![CDATA[{bof, Offset}]]></c>.</p>
+ </item>
+ <tag><c><![CDATA[{bof, Offset}]]></c></tag>
+ <item>
+ <p>Absolute offset.</p>
+ </item>
+ <tag><c><![CDATA[{cur, Offset}]]></c></tag>
+ <item>
+ <p>Offset from the current position.</p>
+ </item>
+ <tag><c><![CDATA[{eof, Offset}]]></c></tag>
+ <item>
+ <p>Offset from the end of file.</p>
+ </item>
+ <tag><c><![CDATA[bof | cur | eof]]></c></tag>
+ <item>
+ <p>The same as eariler with <c><![CDATA[Offset]]></c> 0,
+ that is, <c><![CDATA[{bof, 0} | {cur, 0} | {eof, 0}]]></c>.
+ </p>
+ </item>
+ </taglist>
</desc>
</func>
+
<func>
- <name>read(ChannelPid, Handle, Len) -> </name>
- <name>read(ChannelPid, Handle, Len, Timeout) -> {ok, Data} | eof | {error, Error}</name>
- <name>pread(ChannelPid, Handle, Position, Len) -> </name>
+ <name>pread(ChannelPid, Handle, Position, Len) -></name>
<name>pread(ChannelPid, Handle, Position, Len, Timeout) -> {ok, Data} | eof | {error, Error}</name>
- <fsummary>Read from an open file</fsummary>
+ <fsummary>Reads from an open file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Handle = term()</v>
@@ -336,47 +385,16 @@
<v>Reason = term()</v>
</type>
<desc>
- <p>Reads <c><![CDATA[Len]]></c> bytes from the file referenced by
- <c><![CDATA[Handle]]></c>. Returns <c><![CDATA[{ok, Data}]]></c>, <c><![CDATA[eof]]></c>, or
- <c><![CDATA[{error, Reason}]]></c>. If the file is opened with <c><![CDATA[binary]]></c>,
- <c><![CDATA[Data]]></c> is a binary, otherwise it is a string.</p>
- <p>If the file is read past eof, only the remaining bytes
- will be read and returned. If no bytes are read, <c><![CDATA[eof]]></c>
- is returned.</p>
- <p>The <c><![CDATA[pread]]></c> function reads from a specified position,
- combining the <c><![CDATA[position]]></c> and <c><![CDATA[read]]></c> functions.</p>
- </desc>
- </func>
- <func>
- <name>aread(ChannelPid, Handle, Len) -> {async, N} | {error, Error}</name>
- <name>apread(ChannelPid, Handle, Position, Len) -> {async, N} | {error, Error}</name>
- <fsummary>Read asynchronously from an open file</fsummary>
- <type>
- <v>ChannelPid = pid()</v>
- <v>Handle = term()</v>
- <v>Position = integer()</v>
- <v>Len = integer()</v>
- <v>N = term()</v>
- <v>Reason = term()</v>
- </type>
- <desc>
- <p>Reads from an open file, without waiting for the result. If the
- handle is valid, the function returns <c><![CDATA[{async, N}]]></c>, where N
- is a term guaranteed to be unique between calls of <c><![CDATA[aread]]></c>.
- The actual data is sent as a message to the calling process. This
- message has the form <c><![CDATA[{async_reply, N, Result}]]></c>, where
- <c><![CDATA[Result]]></c> is the result from the read, either <c><![CDATA[{ok, Data}]]></c>,
- or <c><![CDATA[eof]]></c>, or <c><![CDATA[{error, Error}]]></c>.</p>
- <p>The <c><![CDATA[apread]]></c> function reads from a specified position,
- combining the <c><![CDATA[position]]></c> and <c><![CDATA[aread]]></c> functions.</p>
+ <p>The <c><![CDATA[pread]]></c> function reads from a specified position,
+ combining the <c><![CDATA[position]]></c> and <c><![CDATA[read]]></c> functions.</p>
+ <p><seealso marker="#read-4">ssh_sftp:read/4</seealso></p>
</desc>
</func>
+
<func>
- <name>write(ChannelPid, Handle, Data) -></name>
- <name>write(ChannelPid, Handle, Data, Timeout) -> ok | {error, Error}</name>
- <name>pwrite(ChannelPid, Handle, Position, Data) -> ok </name>
+ <name>pwrite(ChannelPid, Handle, Position, Data) -> ok</name>
<name>pwrite(ChannelPid, Handle, Position, Data, Timeout) -> ok | {error, Error}</name>
- <fsummary>Write to an open file</fsummary>
+ <fsummary>Writes to an open file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Handle = term()</v>
@@ -386,94 +404,59 @@
<v>Reason = term()</v>
</type>
<desc>
- <p>Writes<c><![CDATA[data]]></c> to the file referenced by <c><![CDATA[Handle]]></c>.
- The file should be opened with <c><![CDATA[write]]></c> or <c><![CDATA[append]]></c>
- flag. Returns <c><![CDATA[ok]]></c> if successful or S<c><![CDATA[{error, Reason}]]></c>
- otherwise.</p>
- <p>Typical error reasons are:</p>
- <taglist>
- <tag><c><![CDATA[ebadf]]></c></tag>
- <item>
- <p>The file is not opened for writing.</p>
- </item>
- <tag><c><![CDATA[enospc]]></c></tag>
- <item>
- <p>There is a no space left on the device.</p>
- </item>
- </taglist>
+ <p>The <c><![CDATA[pread]]></c> function writes to a specified position,
+ combining the <c><![CDATA[position]]></c> and <c><![CDATA[write]]></c> functions.</p>
+ <p><seealso marker="#write-3">ssh_sftp:write/3</seealso></p>
</desc>
</func>
- <func>
- <name>awrite(ChannelPid, Handle, Data) -> ok | {error, Reason} </name>
- <name>apwrite(ChannelPid, Handle, Position, Data) -> ok | {error, Reason}</name>
- <fsummary>Write asynchronously to an open file</fsummary>
+
+
+ <func>
+ <name>read(ChannelPid, Handle, Len) -></name>
+ <name>read(ChannelPid, Handle, Len, Timeout) -> {ok, Data} | eof | {error, Error}</name>
+ <fsummary>Reads from an open file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Handle = term()</v>
<v>Position = integer()</v>
<v>Len = integer()</v>
- <v>Data = binary()</v>
<v>Timeout = timeout()</v>
+ <v>Data = string() | binary()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Writes to an open file, without waiting for the result. If the
- handle is valid, the function returns <c><![CDATA[{async, N}]]></c>, where N
- is a term guaranteed to be unique between calls of
- <c><![CDATA[awrite]]></c>. The result of the <c><![CDATA[write]]></c> operation is sent
- as a message to the calling process. This message has the form
- <c><![CDATA[{async_reply, N, Result}]]></c>, where <c><![CDATA[Result]]></c> is the result
- from the write, either <c><![CDATA[ok]]></c>, or <c><![CDATA[{error, Error}]]></c>.</p>
- <p>The <c><![CDATA[apwrite]]></c> writes on a specified position, combining
- the <c><![CDATA[position]]></c> and <c><![CDATA[awrite]]></c> operations.</p>
+ <p>Reads <c><![CDATA[Len]]></c> bytes from the file referenced by
+ <c><![CDATA[Handle]]></c>. Returns <c><![CDATA[{ok, Data}]]></c>, <c><![CDATA[eof]]></c>, or
+ <c><![CDATA[{error, Reason}]]></c>. If the file is opened with <c><![CDATA[binary]]></c>,
+ <c><![CDATA[Data]]></c> is a binary, otherwise it is a string.</p>
+ <p>If the file is read past <c>eof</c>, only the remaining bytes
+ are read and returned. If no bytes are read, <c><![CDATA[eof]]></c>
+ is returned.</p>
</desc>
</func>
- <func>
- <name>position(ChannelPid, Handle, Location) -> </name>
- <name>position(ChannelPid, Handle, Location, Timeout) -> {ok, NewPosition | {error, Error}</name>
- <fsummary>Seek position in open file</fsummary>
+
+ <func>
+ <name>read_file(ChannelPid, File) -></name>
+ <name>read_file(ChannelPid, File, Timeout) -> {ok, Data} | {error, Reason}</name>
+ <fsummary>Reads a file.</fsummary>
<type>
- <v>ChannelPid = pid()</v>
- <v>Handle = term()</v>
- <v>Location = Offset | {bof, Offset} | {cur, Offset} | {eof, Offset} | bof | cur | eof</v>
- <v>Offset = integer()</v>
+ <v>ChannelPid = pid()</v>
+ <v>File = string()</v>
+ <v>Data = binary()</v>
<v>Timeout = timeout()</v>
- <v>NewPosition = integer()</v>
- <v>Reason = term()</v>
+ <v>Reason = term()</v>
</type>
<desc>
- <p>Sets the file position of the file referenced by <c><![CDATA[Handle]]></c>.
- Returns <c><![CDATA[{ok, NewPosition}]]></c> (as an absolute offset) if
- successful, otherwise <c><![CDATA[{error, Reason}]]></c>. <c><![CDATA[Location]]></c> is
- one of the following:</p>
- <taglist>
- <tag><c><![CDATA[Offset]]></c></tag>
- <item>
- <p>The same as <c><![CDATA[{bof, Offset}]]></c>.</p>
- </item>
- <tag><c><![CDATA[{bof, Offset}]]></c></tag>
- <item>
- <p>Absolute offset.</p>
- </item>
- <tag><c><![CDATA[{cur, Offset}]]></c></tag>
- <item>
- <p>Offset from the current position.</p>
- </item>
- <tag><c><![CDATA[{eof, Offset}]]></c></tag>
- <item>
- <p>Offset from the end of file.</p>
- </item>
- <tag><c><![CDATA[bof | cur | eof]]></c></tag>
- <item>
- <p>The same as above with <c><![CDATA[Offset]]></c> 0.</p>
- </item>
- </taglist>
+ <p>Reads a file from the server, and returns the data in a binary,
+ like
+ <seealso marker="file#read_file-1">file:read_file/1</seealso></p>
</desc>
</func>
- <func>
- <name>read_file_info(ChannelPid, Name) -> </name>
+
+ <func>
+ <name>read_file_info(ChannelPid, Name) -></name>
<name>read_file_info(ChannelPid, Name, Timeout) -> {ok, FileInfo} | {error, Reason}</name>
- <fsummary>Get information about a file</fsummary>
+ <fsummary>Gets information about a file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Name = string()</v>
@@ -484,137 +467,190 @@
</type>
<desc>
<p>Returns a <c><![CDATA[file_info]]></c> record from the file specified by
- <c><![CDATA[Name]]></c> or <c><![CDATA[Handle]]></c>, like <c><![CDATA[file:read_file_info/2]]></c>.</p>
+ <c><![CDATA[Name]]></c> or <c><![CDATA[Handle]]></c>,
+ like <seealso marker="file#read_file_info-2">file:read_file_info/2</seealso></p>
</desc>
</func>
- <func>
- <name>read_link_info(ChannelPid, Name) -> {ok, FileInfo} | {error, Reason}</name>
- <name>read_link_info(ChannelPid, Name, Timeout) -> {ok, FileInfo} | {error, Reason}</name>
- <fsummary>Get information about a symbolic link</fsummary>
+
+ <func>
+ <name>read_link(ChannelPid, Name) -></name>
+ <name>read_link(ChannelPid, Name, Timeout) -> {ok, Target} | {error, Reason}</name>
+ <fsummary>Reads symbolic link.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Name = string()</v>
- <v>Handle = term()</v>
- <v>Timeout = timeout()</v>
- <v>FileInfo = record()</v>
+ <v>Target = string()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Returns a <c><![CDATA[file_info]]></c> record from the symbolic
- link specified by <c><![CDATA[Name]]></c> or <c><![CDATA[Handle]]></c>, like
- <c><![CDATA[file:read_link_info/2]]></c>.</p>
+ <p>Reads the link target from the symbolic link specified
+ by <c><![CDATA[name]]></c>, like
+ <seealso marker="file#read_link-1">file:read_link/1</seealso></p>
</desc>
</func>
- <func>
- <name>write_file_info(ChannelPid, Name, Info) -> </name>
- <name>write_file_info(ChannelPid, Name, Info, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Write information for a file</fsummary>
+
+ <func>
+ <name>read_link_info(ChannelPid, Name) -> {ok, FileInfo} | {error, Reason}</name>
+ <name>read_link_info(ChannelPid, Name, Timeout) -> {ok, FileInfo} | {error, Reason}</name>
+ <fsummary>Gets information about a symbolic link.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Name = string()</v>
- <v>Info = record()</v>
+ <v>Handle = term()</v>
<v>Timeout = timeout()</v>
+ <v>FileInfo = record()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Writes file information from a <c><![CDATA[file_info]]></c> record to the
- file specified by <c><![CDATA[Name]]></c>, like <c><![CDATA[file:write_file_info]]></c>.</p>
+ <p>Returns a <c><![CDATA[file_info]]></c> record from the symbolic
+ link specified by <c><![CDATA[Name]]></c> or <c><![CDATA[Handle]]></c>, like
+ <seealso marker="file#read_link_info-2">file:read_link_info/2</seealso></p>
</desc>
</func>
+
<func>
- <name>read_link(ChannelPid, Name) -> </name>
- <name>read_link(ChannelPid, Name, Timeout) -> {ok, Target} | {error, Reason}</name>
- <fsummary>Read symbolic link</fsummary>
+ <name>rename(ChannelPid, OldName, NewName) -> </name>
+ <name>rename(ChannelPid, OldName, NewName, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Renames a file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
- <v>Name = string()</v>
- <v>Target = string()</v>
+ <v>OldName = string()</v>
+ <v>NewName = string()</v>
+ <v>Timeout = timeout()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Reads the link target from the symbolic link specified
- by <c><![CDATA[name]]></c>, like <c><![CDATA[file:read_link/1]]></c>.</p>
+ <p>Renames a file named <c><![CDATA[OldName]]></c> and gives it the name
+ <c><![CDATA[NewName]]></c>, like
+ <seealso marker="file#rename-2">file:rename/2</seealso></p>
</desc>
</func>
+
<func>
- <name>make_symlink(ChannelPid, Name, Target) -> </name>
- <name>make_symlink(ChannelPid, Name, Target, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Create symbolic link</fsummary>
+ <name>start_channel(ConnectionRef) -></name>
+ <name>start_channel(ConnectionRef, Options) -></name>
+ <name>start_channel(Host, Options) -></name>
+ <name>start_channel(Host, Port, Options) -> {ok, Pid} | {ok, Pid, ConnectionRef} |
+ {error, Reason}</name>
+ <fsummary>Starts an SFTP client.</fsummary>
<type>
- <v>ChannelPid = pid()</v>
- <v>Name = string()</v>
- <v>Target = string()</v>
+ <v>Host = string()</v>
+ <v>ConnectionRef = ssh_connection_ref()</v>
+ <v>Port = integer()</v>
+ <v>Options = [{Option, Value}]</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Creates a symbolic link pointing to <c><![CDATA[Target]]></c> with the
- name <c><![CDATA[Name]]></c>, like <c><![CDATA[file:make_symlink/2]]></c>.</p>
+ <p>If no connection reference is provided, a connection is set
+ up, and the new connection is returned. An SSH channel process
+ is started to handle the communication with the SFTP server.
+ The returned <c>pid</c> for this process is to be used as input to
+ all other API functions in this module.</p>
+
+ <p>Options:</p>
+ <taglist>
+ <tag><c><![CDATA[{timeout, timeout()}]]></c></tag>
+ <item>
+ <p>The time-out is passed to the <c>ssh_channel</c> start function,
+ and defaults to <c>infinity</c>.</p>
+ </item>
+ <tag>
+ <c><![CDATA[{sftp_vsn, integer()}]]></c>
+ </tag>
+ <item>
+ <p>
+ Desired SFTP protocol version.
+ The actual version is the minimum of
+ the desired version and the maximum supported
+ versions by the SFTP server.
+ </p>
+ </item>
+ </taglist>
+ <p>All other options are directly passed to
+ <seealso marker="ssh">ssh:connect/3</seealso> or ignored if a
+ connection is already provided.</p>
</desc>
</func>
- <func>
- <name>rename(ChannelPid, OldName, NewName) -> </name>
- <name>rename(ChannelPid, OldName, NewName, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Rename a file</fsummary>
+
+ <func>
+ <name>stop_channel(ChannelPid) -> ok</name>
+ <fsummary>Stops the SFTP client channel.</fsummary>
<type>
<v>ChannelPid = pid()</v>
- <v>OldName = string()</v>
- <v>NewName = string()</v>
- <v>Timeout = timeout()</v>
- <v>Reason = term()</v>
</type>
<desc>
- <p>Renames a file named <c><![CDATA[OldName]]></c>, and gives it the name
- <c><![CDATA[NewName]]></c>, like <c><![CDATA[file:rename/2]]></c></p>
+ <p>Stops an SFTP channel. Does not close the SSH connection.
+ Use <seealso marker="ssh#close-1">ssh:close/1</seealso> to close it.</p>
</desc>
</func>
+
<func>
- <name>delete(ChannelPid, Name) -> </name>
- <name>delete(ChannelPid, Name, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Delete a file</fsummary>
+ <name>write_file(ChannelPid, File, Iolist) -></name>
+ <name>write_file(ChannelPid, File, Iolist, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Writes a file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
- <v>Name = string()</v>
+ <v>File = string()</v>
+ <v>Iolist = iolist()</v>
<v>Timeout = timeout()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Deletes the file specified by <c><![CDATA[Name]]></c>, like
- <c><![CDATA[file:delete/1]]></c></p>
+ <p>Writes a file to the server, like <seealso
+ marker="file#write_file-2">file:write_file/2</seealso> The
+ file is created if it does not exist. The file is overwritten
+ if it exists.</p>
</desc>
</func>
+
<func>
- <name>make_dir(ChannelPid, Name) -> </name>
- <name>make_dir(ChannelPid, Name, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Create a directory</fsummary>
+ <name>write(ChannelPid, Handle, Data) -></name>
+ <name>write(ChannelPid, Handle, Data, Timeout) -> ok | {error, Error}</name>
+ <fsummary>Writes to an open file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
- <v>Name = string()</v>
+ <v>Handle = term()</v>
+ <v>Position = integer()</v>
+ <v>Data = iolist()</v>
<v>Timeout = timeout()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Creates a directory specified by <c><![CDATA[Name]]></c>. <c><![CDATA[Name]]></c> should
- be a full path to a new directory. The directory can only be
- created in an existing directory.</p>
+ <p>Writes <c><![CDATA[data]]></c> to the file referenced by <c><![CDATA[Handle]]></c>.
+ The file is to be opened with <c><![CDATA[write]]></c> or <c><![CDATA[append]]></c>
+ flag. Returns <c><![CDATA[ok]]></c> if successful or <c><![CDATA[{error, Reason}]]></c>
+ otherwise.</p>
+ <p>Typical error reasons:</p>
+ <taglist>
+ <tag><c><![CDATA[ebadf]]></c></tag>
+ <item>
+ <p>File is not opened for writing.</p>
+ </item>
+ <tag><c><![CDATA[enospc]]></c></tag>
+ <item>
+ <p>No space is left on the device.</p>
+ </item>
+ </taglist>
</desc>
</func>
+
<func>
- <name>del_dir(ChannelPid, Name) -> </name>
- <name>del_dir(ChannelPid, Name, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Delete an empty directory</fsummary>
+ <name>write_file_info(ChannelPid, Name, Info) -></name>
+ <name>write_file_info(ChannelPid, Name, Info, Timeout) -> ok | {error, Reason}</name>
+ <fsummary>Writes information for a file.</fsummary>
<type>
<v>ChannelPid = pid()</v>
<v>Name = string()</v>
+ <v>Info = record()</v>
<v>Timeout = timeout()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p>Deletes a directory specified by <c><![CDATA[Name]]></c>.
- Note that the directory must be empty before it can be successfully deleted
- </p>
+ <p>Writes file information from a <c><![CDATA[file_info]]></c> record to the
+ file specified by <c><![CDATA[Name]]></c>, like
+ <seealso marker="file#write_file_info-2">file:write_file_info/[2,3]</seealso></p>
</desc>
</func>
-
</funcs>
</erlref>