POSIXfy readlink() call

[John Baldwin]

On Monday 11 May 2009 2:33:09 pm Kostik Belousov wrote:
> On Mon, May 11, 2009 at 02:05:07PM -0400, John Baldwin wrote:
> > On Friday 28 September 2007 10:39:56 pm Ighighi wrote:
>                         ^^^^^

Yes, I had this stuck in the back of my head from when it first appeared.

> > > The POXIX prototype for readlink(2) is:
> > > ssize_t readlink(const char *restrict path, char *restrict buf, size_t 
> > > bufsize);
> > 
> > It can't simply be corrected as it would change the ABI and thus requires 
a 
> > new system call, etc.  However, do you really expect a symlink to be 
longer 
> > than 2^31 on a 64-bit machine?
> 
> Yes, I agree that this is ABI change.
> 
> Meantime,
> r176215 | ru | 2008-02-12 22:09:04 +0200 (Tue, 12 Feb 2008) | 5 lines
> 
> Change readlink(2)'s return type and type of the last argument
> to match POSIX.
> 
> Prodded by:     Alexey Lyashkov
> 
> I tried to convince ru@ that ABI breakage is not good, but has not
> succeeded.

Ugh, is this only in HEAD?  If so, I will back it out for 8.0.  If this made 
it into a release then this is a far bigger mess.  Oh, good, this is only in 
8.  I will fix this ASAP.  I can just add the new syscall I guess.

-- 
John Baldwin