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-rw-r--r--lib/erl_interface/doc/src/erl_call.xml217
1 files changed, 120 insertions, 97 deletions
diff --git a/lib/erl_interface/doc/src/erl_call.xml b/lib/erl_interface/doc/src/erl_call.xml
index 46015621ac..f1e52b1889 100644
--- a/lib/erl_interface/doc/src/erl_call.xml
+++ b/lib/erl_interface/doc/src/erl_call.xml
@@ -11,7 +11,7 @@
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
@@ -28,135 +28,146 @@
<docno></docno>
<approved>Bjarne D&auml;cker</approved>
<checked>Torbj&ouml;rn T&ouml;rnkvist</checked>
- <date>97-05-16</date>
+ <date>1997-05-16</date>
<rev>B</rev>
- <file>erl_call.sgml</file>
+ <file>erl_call.xml</file>
</header>
<com>erl_call</com>
- <comsummary>Call/Start a Distributed Erlang Node</comsummary>
+ <comsummary>Call/start a distributed Erlang node.</comsummary>
<description>
- <p><c><![CDATA[erl_call]]></c> makes it possible to start and/or communicate with
- a distributed Erlang node. It is built upon the <c><![CDATA[erl_interface]]></c>
- library as an example application. Its purpose is to use an Unix shell script to interact with a distributed Erlang node. It performs all
- communication with the Erlang <em>rex server</em>, using the standard Erlang RPC facility. It does not require any special
- software to be run at the Erlang target node.</p>
+ <p><c>erl_call</c> makes it possible to start and/or
+ communicate with a distributed Erlang node. It is built upon the
+ <c>Erl_Interface</c> library as an example application.
+ Its purpose is to use a Unix shell script to interact with a distributed
+ Erlang node. It performs all communication with the Erlang
+ <em>rex server</em>, using the standard Erlang RPC facility. It does not
+ require any special software to be run at the Erlang target node.</p>
+
<p>The main use is to either start a distributed Erlang node
or to make an ordinary function call. However, it is also
- possible to pipe an Erlang module to <c><![CDATA[erl_call]]></c> and have it
- compiled, or to pipe a sequence of Erlang expressions to be evaluated
+ possible to pipe an Erlang module to <c>erl_call</c> and have
+ it compiled, or to pipe a sequence of Erlang expressions to be evaluated
(similar to the Erlang shell).</p>
- <p>Options, which cause <c><![CDATA[stdin]]></c> to be read, can be used with
- advantage
- as scripts from within (Unix) shell scripts. Another
- nice use of <c><![CDATA[erl_call]]></c> could be from (http) CGI-bin scripts.</p>
+
+ <p>Options, which cause <c>stdin</c> to be read, can be used
+ with advantage,
+ as scripts from within (Unix) shell scripts. Another nice use
+ of <c>erl_call</c> could be from (HTTP) CGI-bin scripts.</p>
</description>
+
<funcs>
<func>
<name>erl_call &lt;options></name>
- <fsummary>Start/Call Erlang</fsummary>
+ <fsummary>Start/call Erlang.</fsummary>
<desc>
- <p>Each option flag is described below with its name, type and
- meaning. </p>
+ <p>Starts/calls Erlang.</p>
+ <p>Each option flag is described below with its name, type, and
+ meaning.</p>
<taglist>
- <tag>-a [Mod [Fun [Args]]]]</tag>
+ <tag><c>-a [Mod [Fun [Args]]]]</c></tag>
<item>
- <p>(<em>optional</em>): Applies the specified function
- and returns the result. <c><![CDATA[Mod]]></c> must be specified, however
- <c>start</c> and <c>[]</c> are assumed for unspecified <c><![CDATA[Fun]]></c> and <c><![CDATA[Args]]></c>, respectively. <c><![CDATA[Args]]></c> should
- be in the same format as for <c><![CDATA[erlang:apply/3]]></c>. Note
- that this flag takes exactly one argument, so quoting
- may be necessary in order to group <c><![CDATA[Mod]]></c>, <c><![CDATA[Fun]]></c>
- and <c><![CDATA[Args]]></c>, in a manner dependent on the behavior
- of your command shell.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Applies the specified function
+ and returns the result. <c>Mod</c> must be specified.
+ However, <c>start</c> and <c>[]</c> are assumed for unspecified
+ <c>Fun</c> and <c>Args</c>, respectively.
+ <c>Args</c> is to be in the same format as for
+ <seealso marker="erts:erlang#apply/3">
+ <c>erlang:apply/3</c></seealso> in <c>ERTS</c>.</p>
+ <p>Notice that this flag takes exactly one argument, so quoting
+ can be necessary to group <c>Mod</c>,
+ <c>Fun</c>, and <c>Args</c> in a manner
+ dependent on the behavior of your command shell.</p>
</item>
- <tag>-c Cookie</tag>
+ <tag><c>-c Cookie</c></tag>
<item>
- <p>(<em>optional</em>): Use this option to specify a certain cookie. If no cookie is specified, the <c><![CDATA[~/.erlang.cookie]]></c> file is read and its content are used as cookie. The Erlang node we want to communicate with must have the same cookie.</p>
+ <p>(<em>Optional.</em>) Use this option to specify a certain cookie.
+ If no cookie is specified, the <c>~/.erlang.cookie</c>
+ file is read and its content is used as cookie. The Erlang node
+ we want to communicate with must have the same cookie.</p>
</item>
- <tag>-d</tag>
+ <tag><c>-d</c></tag>
<item>
- <p>(<em>optional</em>): Debug mode. This causes all IO to be output
- to the file <c><![CDATA[~/.erl_call.out.Nodename]]></c>, where <c><![CDATA[Nodename]]></c>
+ <p>(<em>Optional.</em>) Debug mode. This causes all I/O to be output
+ to the <c>~/.erl_call.out.Nodename</c> file, where
+ <c>Nodename</c>
is the node name of the Erlang node in question.</p>
- <p></p>
</item>
- <tag>-e</tag>
+ <tag><c>-e</c></tag>
<item>
- <p>(<em>optional</em>): Reads a sequence of Erlang expressions, separated
- by '<em>,</em>' and ended with a '<em>.</em>', from <c><![CDATA[stdin]]></c> until
- EOF (Control-D). Evaluates the expressions and returns the result from
- the last expression. Returns <c><![CDATA[{ok,Result}]]></c> if successful.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Reads a sequence of Erlang expressions,
+ separated by comma (,) and ended with a full stop (.), from
+ <c>stdin</c> until EOF (Control-D). Evaluates the
+ expressions and returns the result from the last expression.
+ Returns <c>{ok,Result}</c> on success.</p>
</item>
- <tag>-h HiddenName</tag>
+ <tag><c>-h HiddenName</c></tag>
<item>
- <p>(<em>optional</em>): Specifies the name of the hidden node
- that <c><![CDATA[erl_call]]></c> represents.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Specifies the name of the hidden node
+ that <c>erl_call</c> represents.</p>
</item>
- <tag>-m</tag>
+ <tag><c>-m</c></tag>
<item>
- <p>(<em>optional</em>): Reads an Erlang module from <c><![CDATA[stdin]]></c> and
- compiles it.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Reads an Erlang module from
+ <c>stdin</c> and compiles it.</p>
</item>
- <tag>-n Node</tag>
+ <tag><c>-n Node</c></tag>
<item>
- <p>(one of <c><![CDATA[-n, -name, -sname]]></c> is required):
- Has the same meaning as <c><![CDATA[-name]]></c> and can still be used for
- backwards compatibility reasons.</p>
- <p></p>
+ <p>(One of <c>-n, -name, -sname</c> is required.)
+ Has the same meaning as <c>-name</c> and can still be
+ used for backward compatibility reasons.</p>
</item>
- <tag>-name Node</tag>
+ <tag><c>-name Node</c></tag>
<item>
- <p>(one of <c><![CDATA[-n, -name, -sname]]></c> is required): <c><![CDATA[Node]]></c> is the name of the node to be
- started or communicated with. It is assumed that
- <c><![CDATA[Node]]></c> is started with <c><![CDATA[erl -name]]></c>, which means that fully
- qualified long node names are used.
- If the <c><![CDATA[-s]]></c> option is given, an Erlang node will (if necessary)
- be started with <c><![CDATA[erl -name]]></c>.</p>
- <p></p>
+ <p>(One of <c>-n, -name, -sname</c> is required.)
+ <c>Node</c> is the name of the node to be
+ started or communicated with. It is assumed that
+ <c>Node</c> is started with
+ <c>erl -name</c>, which means that fully
+ qualified long node names are used. If option
+ <c>-s</c> is specified, an Erlang node will (if
+ necessary) be started with <c>erl -name</c>.</p>
</item>
- <tag>-q</tag>
+ <tag><c>-q</c></tag>
<item>
- <p>(<em>optional</em>): Halts the Erlang node specified
- with the -n switch. This switch overrides the -s switch.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Halts the Erlang node specified
+ with switch <c>-n</c>. This switch overrides switch <c>-s</c>.</p>
</item>
- <tag>-r</tag>
+ <tag><c>-r</c></tag>
<item>
- <p>(<em>optional</em>): Generates a random name of the hidden node
- that <c><![CDATA[erl_call]]></c> represents.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Generates a random name of the hidden node
+ that <c>erl_call</c> represents.</p>
</item>
- <tag>-s</tag>
+ <tag><c>-s</c></tag>
<item>
- <p>(<em>optional</em>): Starts a distributed Erlang node if necessary.
- This means that in a sequence of calls, where the '<c><![CDATA[-s]]></c>'
- and '<c><![CDATA[-n Node]]></c>' are constant, only the first call will start
- the Erlang node. This makes the rest of the communication
- very fast. This flag is currently only available on the Unix platform.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Starts a distributed Erlang node if
+ necessary. This means that in a sequence of calls, where
+ '<c>-s</c>' and '<c>-n Node</c>' are
+ constant, only the first call starts the Erlang node. This makes
+ the rest of the communication very fast. This flag is currently
+ only available on Unix-like platforms (Linux, Mac OS X, Solaris,
+ and so on).</p>
</item>
- <tag>-sname Node</tag>
+ <tag><c>-sname Node</c></tag>
<item>
- <p>(one of <c><![CDATA[-n, -name, -sname]]></c> is required): <c><![CDATA[Node]]></c> is the name of the node to
- be started or communicated with. It is assumed that <c><![CDATA[Node]]></c> is started with <c><![CDATA[erl -sname]]></c> which means that short node names are used.
- If <c><![CDATA[-s]]></c> option is given, an Erlang node will be started (if necessary) with <c><![CDATA[erl -sname]]></c>.</p>
- <p></p>
+ <p>(One of <c>-n, -name, -sname</c> is required.)
+ <c>Node</c> is the name of the node to be started
+ or communicated with. It is assumed that <c>Node</c>
+ is started with <c>erl -sname</c>, which means that
+ short node names are used. If option <c>-s</c> is
+ specified, an Erlang node is started (if necessary) with
+ <c>erl -sname</c>.</p>
</item>
- <tag>-v</tag>
+ <tag><c>-v</c></tag>
<item>
- <p>(<em>optional</em>): Prints a lot of <c><![CDATA[verbose]]></c> information.
- This is only useful for the developer and maintainer of <c><![CDATA[erl_call]]></c>.</p>
- <p></p>
+ <p>(<em>Optional.</em>) Prints a lot of <c>verbose</c>
+ information. This is only useful for the developer and maintainer
+ of <c>erl_call</c>.</p>
</item>
- <tag>-x ErlScript</tag>
+ <tag><c>-x ErlScript</c></tag>
<item>
- <p>(<em>optional</em>): Specifies another name of the Erlang start-up script
- to be used. If not specified, the standard <c><![CDATA[erl]]></c> start-up script
- is used.</p>
+ <p>(<em>Optional.</em>) Specifies another name of the Erlang
+ startup script to be used. If not specified, the standard
+ <c>erl</c> startup script is used.</p>
</item>
</taglist>
</desc>
@@ -165,20 +176,29 @@
<section>
<title>Examples</title>
- <p>Starts an Erlang node and calls <c><![CDATA[erlang:time/0]]></c>.</p>
+ <p>To start an Erlang node and call <c>erlang:time/0</c>:</p>
+
<code type="none"><![CDATA[
erl_call -s -a 'erlang time' -n madonna
{18,27,34}
]]></code>
- <p>Terminates an Erlang node by calling <c><![CDATA[erlang:halt/0]]></c>.</p>
+
+ <p>To terminate an Erlang node by calling
+ <c>erlang:halt/0</c>:</p>
+
<code type="none"><![CDATA[
erl_call -s -a 'erlang halt' -n madonna
]]></code>
- <p>An apply with several arguments.</p>
+
+ <p>To apply with many arguments:</p>
+
<code type="none"><![CDATA[
erl_call -s -a 'lists map [{math,sqrt},[1,4,9,16,25]]' -n madonna
]]></code>
- <p>Evaluates a couple of expressions. <em>The input ends with EOF (Control-D)</em>.</p>
+
+ <p>To evaluate some expressions
+ (<em>the input ends with EOF (Control-D)</em>):</p>
+
<code type="none"><![CDATA[
erl_call -s -e -n madonna
statistics(runtime),
@@ -189,10 +209,14 @@ Y=2,
^D
{ok,{3,0}}
]]></code>
- <p>Compiles a module and runs it. <em>Again, the input ends with EOF (Control-D)</em>. (In the example shown, the output has been formatted afterwards).</p>
+
+ <p>To compile a module and run it (<em>again, the input ends with EOF
+ (Control-D)</em>):</p>
+ <p>(In the example, the output has been formatted afterwards.)</p>
+
<code type="none"><![CDATA[
-erl_call -s -m -a lolita -n madonna
--module(lolita).
+erl_call -s -m -a procnames -n madonna
+-module(procnames).
-compile(export_all).
start() ->
P = processes(),
@@ -238,4 +262,3 @@ start() ->
]]></code>
</section>
</comref>
-