Implementation errors in strtol()

[Andrey Chernov]

On Mon, Jan 24, 2005 at 12:16:30AM +0200, Giorgos Keramidas wrote:
> If errno is explicitly set (i.e. zeroed) by the calling program
> immediately before strtol(), can we not be sure that it was, in fact,
> strtol() that set it to any non-zero value?

Portable application can't be sure to not get surprise errno values. 
POSIX-conformant application, contrarily, can. Portability and standards 
conformance are different things.

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