On 2007-04-04, Thomi Aurel RUAG A <[EMAIL PROTECTED]> wrote:
> I'm using Python 2.4.2 on an ARM (PXA-270) platform (linux-2.6.17).
> My Goal is to write a list of bytes down to a file (opened in binary
> mode) in one cycle. The crux is that a '0x0a' (line feed) will break the
> cycle of one writing into several pieces.
Says who? I've never experienced this...
> Writing to a "simple" file, this wouldn't cause any problem.
>
> Assuming - without questioning ;-) - that a device file (/dev/*) has to
> be written in one cycle because one write call will be interpreted as
> one "transaction".
I've never seen a write() on a file descriptor broken up by
Python. What makes you think this is an issue?
> The write behaviour on line feed's isn't really usefull
What write behavior?
> because such "transactions" would be broken up into serveral
> pieces and therefore for the device into several
> "transactions".
>
> Is there a possibility to write a list of bytes "en bloc" to a
> binary file? (without the interpreting of the line feed's)
> Opening a file i binary mode (i.e "wb") seems not to be
> enough.
It sounds like you're using open() and Python file objects.
You probably ought to use os.open() an os.write().
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