Messages in this thread | | | Date | Fri, 27 Mar 2015 09:49:32 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] Add preadv2/pwritev2 documentation. |
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On Mon, 16 Mar 2015 14:32:26 -0400 Milosz Tanski <milosz@adfin.com> wrote:
> +.BR pwritev2 () > can also fail for the same reasons as > .BR lseek (2). > -Additionally, the following error is defined: > +Additionally, the following errors are defined: > +.TP > +.B EAGAIN > +The operation would block. This is possible if the file descriptor \fIfd\fP refers to a socket and has been marked nonblocking > +.RB ( O_NONBLOCK ), > +or the operation is a > +.BR preadv2 > +and the \fIflags\fP argument is set to > +.BR RWF_NONBLOCK.
Can you please expand on this to describe the circumstances in which pread2() returns -EAGAIN? Let's fix up the short-read confusion.
And let's have a think about EAGAIN vs EWOULDBLOCK.
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