setgroups() moved?

[Kjartan Maraas]

Hi.

It looks like this function moved? The man page says:

SYNOPSIS
       #include <sys/types.h>
       #include <unistd.h>

but it seems like it's really living in <grp.h>:

[kmaraas at localhost xpl]$ grep setgroups /usr/include/*.h
/usr/include/grp.h:extern int setgroups (size_t __n, __const __gid_t
*__groups) __THROW;

What's the right way of getting at this function? Preferrably in a way
that works with other distros/OSes?

Cheers
Kjartan