4.3BSD - /usr/man/cat2/setgroups.0

SETGROUPS(2)                                                      SETGROUPS(2)


NAME
       setgroups - set group access list

SYNOPSIS
       #include <sys/param.h>

       setgroups(ngroups, gidset)
       int ngroups, *gidset;

DESCRIPTION
       Setgroups  sets  the  group  access  list  of  the current user process
       according to the array gidset.  The  parameter  ngroups  indicates  the
       number  of  entries  in  the array and must be no more than NGROUPS, as
       defined in <sys/param.h>.

       Only the super-user may set new groups.

RETURN VALUE
       A 0 value is returned on success, -1 on error, with a error code stored
       in errno.

ERRORS
       The setgroups call will fail if:

       [EPERM]        The caller is not the super-user.

       [EFAULT]       The  address specified for gidset is outside the process
                      address space.

SEE ALSO
       getgroups(2), initgroups(3X)

BUGS
       The gidset array should be of type gid_t, but remains integer for  com‐
       patibility with earlier systems.


4.2 Berkeley Distribution        May 13, 1986                     SETGROUPS(2)