Dear Adarsh Babu Kalepalli,
In message
you wrote:
>
> When we type "help shell_command" at u-boot console.
> The syntax for the command usage is displayed.
>
> In most of the cases I noticed parameters enclosed in '[]' or/and '<>'
> or just the sub-command string is provided.
>
> From the help of most of the commands, and on using them I observed that
> parameters enclosed in
> -'[]' could be optional
> -'<>' could be mandatory
>
> In some cases, the mandatory parameters were not enclosed in "<>" .
> For ex.
> env ask name [message] [size] - ask for environment variable
> env edit name - edit environment variable
> env exists name - tests for existence of variable
>
> in the above case "name" seems to be a mandatory parameter.
>
> Could you please let me know the notation we follow to indicate the
> mandatory and optional input parameters for shell commands in their syntax
> (displayed through help) ??
In general we try to follow the SYNOPSIS style of UNIX™ man pages,
see [1]:
For commands, this shows the syntax of the command and its
arguments (including options); boldface is used for as-is
text and italics are used to indicate replaceable arguments.
Brackets ([]) surround optional arguments, vertical bars (|)
separate choices, and ellipses (...) can be repeated.
Only we don't have bold or italic fonts, so bold is often omitted
and in some cases we may write .
But note that these texts have been written buy a large number of
developers, so don't expect strict consistency. But as usual:
patches for cleanup are always welcome.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
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