Implementation of strtok

[Florian Weimer]

* Jayakrishna Vadayath:

> The man page of strtok mention that strtok returns a pointer to the
> next token or NULL if there are no more tokens :
> https://man7.org/linux/man-pages/man3/strtok.3.html I can see how the
> "no more tokens" would apply in this case, but it seems like not many
> people are aware of this case.
>
> Can you list the descriptions of strtok that explain this behavior ?

This part is quite clear to me:

| The first call to strtok() sets this pointer to point to the first
| byte of the string.  The start of the next token is determined by
| scanning forward for the next nondelimiter byte in str.  If such a
| byte is found, it is taken as the start of the next token.  If no such
| byte is found, then there are no more tokens, and strtok() returns
| NULL.

The last sentence is really unambiguous.  Maybe it's the double
negation?

Thanks,
Florian