On Sun, Oct 06, 2024 at 02:48:56PM -0300, Gustavo Rios wrote:
> Hi folks!
>
> I am programming in obsd using the c coding language. I have a doubt
> related to parameters and return value of write. My doubt is related to the
> fact that write has a parameter of the number of bytes to write in
> non-negative value. But it returns a signed value. Lets suppose i specify
> as the parameter a number of bytes to write with the size of 2 ^ 31 - 100;
> the internal represetation of signed and unsigned is the same, for
> instance, -100 and 2^31 - 100 is the same value.
>
> In this scenario, how to handle a negative value of the return that is not
> a error as signess result but is negative.
>
> How do you handle this?
>
> Thanks.
>
> PS: sorry for my poor english.
look at the man page: write will fail if the argument give is too large:
[EINVAL] nbytes was larger than SSIZE_MAX.
So it *is* an error to pass a too large size.
-Otto
