In this case, Linux (at least, Ubuntu 13.10, x86-64 kernel 3.11.0-14-generic)
sets POLLHUP and gives no other error notification.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

A zero-length read should complete immediately, even if the fd isn't readable.
Wire this up, and expose it for callers to use.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

For now, we'll just have this and later on I'll make it support
writing it also using cpuid_write_info.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

This code provides some macros to check arguments for valid value ranges.
Consider this a mild version of assert(3), because all it does is to log
a message and continue.

These macros don't replace error handling, but they are useful in
situations where an error is unexpected but not common, i.e.
this shouldn't happen but if it does let me know".
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

And add test for that which also tests duplex case.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

This reverts commit 490b6385.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Conflicts:
	ccan/io/io.c

This function writes CPU information to a file.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Turns out to be useful for complex cases.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Especially where we have just done a read and spin off a duplex to do a read
as well.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

eax/ebx/ecx/edx are 32-bit registers, and we need 8 bits from most
significand bits so there is no need to mask out 0xFF.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Otherwise, it's a PITA to close a duplexed connection.  If necessary we
can introduce a half-close to de-deplex later.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Also take out additional feature information from processor information
and feature bits since they can be tested using cpuid_test_feature() and
cpuid_has_feature()
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

For now, we will just test for normal features, later on it'll be added
back.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Both run-set_alloc and run-15-timeout used the same port, so they sometimes
got stuck when running in parallel.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Apparently init --user adopts orphans.  To quote the author
Stewart Smith:

  As much as one can be happy in Ubuntu breaking something that has been
  true for what must be approaching 40 years, yep, I'm happy for you to
  make the changes.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Trivial, but they make coding easier and more predictable.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

MSVC only supports inline assembly and does not support the keyword
volatile for assembly.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

This is a much more cleaner way to do it and _should_ be easier for people
to use.
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>

Useful for getsockname().
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

I really wanted an array of bytes in there, so make it more flexible.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Not a perfect solution (we'd ideally want to go to another plan
immediately, but that would involve a malloc).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>