positive or negative error values from vendor library for immediate errors?

Devesh Sharma
2014-12-08T10:47:10Z

Hello list,

While reviewing some the vendor library source I found that Mellanox and Pathscale user-space provider library returns positive error number if any immediate error is encountered.
However, other vendor user-space libraries return negative error numbers.

Is there any guideline on this topic. If not, what is the correct way to do this.
Taking reference of glibc implementation, I found that it expects negative integer as return value.

Any pointer/reference/guideline will be a great help.

-Regards
Devesh
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