#include <unistd.h>

int setgroups(int ngroups, const gid_t *grouplist) {
	int i,j;
	gid_t *grouplist2 = (gid_t *)grouplist;

	for (i=0; i < ngroups; i++)
		if (grouplist2[i] == -1) {
			for (j=i; j < ngroups-1; j++)
				grouplist2[j] = grouplist2[j+1];
			ngroups--;
		}
			
	return _setgroups(ngroups, (const gid_t *)grouplist2);
}