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- Subject: Re: luasocket and selecting from files.
- From: Jorge <xxopxe@...>
- Date: Wed, 01 Jul 2015 10:22:40 +0200
On 01/07/15 04:29, Sean Conner wrote:
From files, like '/usr/local/include/lua.h' or from any type of device
that uses a file handle? I only ask this because using select() on an
actual file (like '/usr/local/include/lua.h') will *always* be
readable and writable---i.e. there's just no use in using select() for
files  as Linux does some aggressive memory caching. select() 
works much better for sockets and character devices like /dev/tty.
Yes, is for device files that block reads when there is no data. And for
plain files too.
To get the underlying file descriptor from a FILE *, you need to use
the C function fileno().
I see... Then luasocket can not be used on it's own for this purpose, I
need another chunk o C code somewhere. I my environment luasocket is the
only external library available, so some rethinking is needed.
Is there any working code out there doing this?
For files? I don't know, but it would be similar with files (as sockets
are file handles).
I was thinking code preparing a file handle for serving with luasocket.
There seems to be some weird dancing involved with creating a connected
socket, replacing its fd, then invalidating something setting a fd of