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> > What kind of copy, memcpy()? And just for simplicity?
> Yes. Handling strings is a matter of last resort.
Okay, I can see that.
> > > + while (bytes_read < IMGSIZE) {
> Because you don't want frustrated users hitting ctrl-c and
> nothing happens. Especially with an imperfectly understood
> device.
Also fine with me. Can you give me a hint on how to do so?
I suppose the while() needs an additional signal condition..
> The simplest way to do this is to issue the IO operation on
> read if the buffer is empty. Now you are returning zero bytes
> on a normal read(). That's a violation of POSIX.
OK, seems reasonable, too, but where does read() return zero
bytes (except at end-of-file, where POSIX requires this)?
To issue a read(), the device has to be open()ed first,
hasn't it?
Yours, Florian
- --
Homo homini lupus.
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