Re: [Xen-devel] [PATCH] docs: document handling of metacharacter escape in xl disk format

[Jim Fehlig <jfehlig@xxxxxxxx>]

Ian Campbell wrote:
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Jim Fehlig <jfehlig@xxxxxxxx>
> ---
>  docs/misc/xl-disk-configuration.txt | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/docs/misc/xl-disk-configuration.txt 
> b/docs/misc/xl-disk-configuration.txt
> index 6a2118d..a03ad10 100644
> --- a/docs/misc/xl-disk-configuration.txt
> +++ b/docs/misc/xl-disk-configuration.txt
> @@ -48,6 +48,24 @@ positionally or explicitly).
>  
>  Whitespace may appear before each parameter and will be ignored.
>  
> +Metacharacters in a <diskspec> may be escaped using a backslash:
> +
> +    Escape      HEX     Description
> +    ------      ---     -----------
> +    \a          0x07    Bell
> +    \b          0x08    Backspace
> +    \t          0x09    Horizontal Tab
> +    \n          0x0A    New Line / Line Feed
> +    \f          0x0C    Form Feed
> +    \r          0x0D    Carriage Return
> +    \v          0x0B    Vertical Tab
> +    \"          0x22    A literal double quote
> +    \'          0x27    A literal single quote
> +    \\          0x5C    A literal backslash
> +    \xXX                Character XX in hexadecimal
> +    \OOO                Character OOO in octal

Do you know how any of these would be useful in a diskspec? I guess I'm
struggling to understand when a 'Bell' would be needed :-).

Regards,
Jim

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