Am Wed, 2 Jun 2021 08:30:08 +0200
schrieb Juergen Gross <jgross@suse.com>:

> On 01.06.21 18:10, Olaf Hering wrote:
> > +int readv_exact(int fd, const struct iovec *iov, int iovcnt)

> > +        if ( len <= 0 )
> > +        {
> > +            rc = -1;  
> Is EOF really an error?

I think yes, that's what "exact" implies IMO.


> This will stop the loop, even if idx hasn't reached iovcnt.

Yes, it will trigger yet another readv().

The "while" might be a leftover from a variant which used repeated read_exact to finish the function. It should become a "if", and the "len = 0" can be removed.

Olaf