RFR: 8229872: (fs) Increase buffer size used with getmntent

[Alan Bateman]

On 23/08/2019 15:41, Vladimir Kempik wrote:
> Hello
>
> please review v3 version of patch
>
> http://cr.openjdk.java.net/~vkempik/8229872/webrev.03/
>
> no locks required now
> getline is used in reduced form, to only return linelen, nice comment 
> about that in code included:
I think the approach is reasonable but a few things need to be moved 
around to be consistent with the other code in this area.

Can you move rewind to UnixNativeDispatcher so that it's with the other 
FILE* functions? I'm pretty sure you have to set errno to 0 before 
calling it and it will set it if there is an error.

I think UnixNativeDispatcher should also define getline to wrap the libc 
function rather that getlinelen.

I think we should change getmnent to take both a buffer and buffer 
length. If you look at the other wrapper methods you'll see how they use 
NativeBuffer to avoid the malloc in native code.

-Alan