gr_add
return (gr_add(gr, NULL));
gr_add(const struct group *_gr, const char *_newmember);
const struct nhgrp_object *gr_add, int *perror)
add_priv = NHGRP_PRIV_CONST(gr_add);
*grp = gr_add(*grp, pwd->pw_name);
grp = gr_add(grp, pwd->pw_name);
grp = gr_add(grp, pwd->pw_name);