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Improve documentation for the SHELL() dialplan function.

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Merged revisions 370383 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 370384 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370385 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2012-07-23 21:10:27 +00:00
parent 014e8a0a80
commit ec14c2563e
1 changed files with 13 additions and 15 deletions
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28
funcs/func_shell.c
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@@ -1,7 +1,7 @@
/* /*
* Asterisk -- An open source telephony toolkit. * Asterisk -- An open source telephony toolkit.
* *
* Copyright (C) 2006, Digium, Inc. * Copyright (C) 2006-2012, Digium, Inc.
* *
* See http://www.asterisk.org for more information about * See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact * the Asterisk project. Please do not directly contact
@@ -16,9 +16,9 @@
/*! \file /*! \file
* *
* SHELL function to return the value of a system call. * SHELL function to return the output generated by a command issued to the system shell.
* *
* \note Inspiration and Guidance from Russell! Thank You! * \note Inspiration and Guidance from Russell! Thank You!
* *
* \author Brandon Kruse <bkruse@digium.com> * \author Brandon Kruse <bkruse@digium.com>
* *
@@ -79,23 +79,22 @@ static int shell_helper(struct ast_channel *chan, const char *cmd, char *data,
/*** DOCUMENTATION /*** DOCUMENTATION
<function name="SHELL" language="en_US"> <function name="SHELL" language="en_US">
<synopsis> <synopsis>
Executes a command as if you were at a shell. Executes a command using the system shell and captures its output.
</synopsis> </synopsis>
<syntax> <syntax>
<parameter name="command" required="true"> <parameter name="command" required="true">
<para>This is the argument to the function, the command you want to pass to the shell.</para> <para>The command that the shell should execute.</para>
</parameter> </parameter>
</syntax> </syntax>
<description> <description>
<para>Returns the value from a system command</para> <para>Collects the output generated by a command executed by the system shell</para>
<para>Example: <literal>Set(foo=${SHELL(echo \bar\)})</literal></para> <para>Example: <literal>Set(foo=${SHELL(echo \bar\)})</literal></para>
<note><para>When using the SHELL() dialplan function, your \SHELL\ is /bin/sh, <note><para>The command supplied to this function will be executed by the
which may differ as to the underlying shell, depending upon your production system's shell, typically specified in the SHELL environment variable. There
platform. Also keep in mind that if you are using a common path, you should are many different system shells available with somewhat different behaviors,
be mindful of race conditions that could result from two calls running so the output generated by this function may vary between platforms.</para></note>
SHELL() simultaneously.</para></note>
</description> </description>
</function> </function>
***/ ***/
static struct ast_custom_function shell_function = { static struct ast_custom_function shell_function = {
@@ -113,5 +112,4 @@ static int load_module(void)
return ast_custom_function_register(&shell_function); return ast_custom_function_register(&shell_function);
} }
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Returns the output of a shell command"); AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Collects the output generated by a command executed by the system shell");