[U-Boot] [PATCH] tools: mkimage can read input on /dev/stdin

[Wolfgang Denk <wd@denx.de>]

Dear Julien,

In message <CADF714bJ6-WvjBSd1u8UA-zT+H0TUO5vqO3_-6Q34yUjvbkVxw@mail.gmail.com> you wrote:
> On Sat, Sep 27, 2014 at 2:54 PM, Wolfgang Denk <wd@denx.de> wrote:
> > What would be the benefit of doing so?  Do you have an example for a
> > practical use case where this makes sense?
> 
> In my case, I have a TFTP server that dyncamically generates uboot
> bootfiles when a specific file is requested. The input template file
> being generated, I need to create a temporary file to store it before
> calling mkimage. Except the mmap, there's no technical restriction for
> mkimage to be able to read on a pipe.

Sorry, but I don't understand this.   Where are the image(s) coming
from, then?  Who or what is feeding the pipe?

> > What is the size and performance impact of the suggested change for
> > typical use cases?
> 
> None. The behaviour is exactly the same.

I don't believe you.  Sizes rare certainly not identical, and neither
is the performance.  Did you do any real measurements?

Best regards,

Wolfgang Denk

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